Ariston Benchmark System A 30 RFF User Manual

System A 24 RFFI  
System A 30 RFFI  
SYSTEM A  
Installation and  
Servicing  
Instructions  
Type C Boilers  
G.C.N:  
G.C.N:  
47-116-14 (24 kW)  
47-116-15 (30 kW)  
LEAVE THESE  
INSTRUCTIONS WITH THE  
END-USER  
Country of destination  
GB  
IE  
Contents  
CUSTOMER CARE  
Page  
Guarantee ............................................................................................................................................................2  
Statutory Requirements .......................................................................................................................................2  
Contents ...............................................................................................................................................................3  
INTRODUCTION ..................................................................................................................................................4  
USER’S INSTRUCTION .......................................................................................................................................5  
1 CONTROL PANEL...........................................................................................................................................5  
2 HOW TO USE .................................................................................................................................................6  
Switching on ..........................................................................................................................................6  
Time setting ............................................................................................................................................6  
Heating ...................................................................................................................................................6  
Burner ON................................................................................................................................................6  
Stand by mode ........................................................................................................................................6  
Switch OFF .............................................................................................................................................6  
Anti freezing mode ..................................................................................................................................7  
3 MAINTENANCE ..............................................................................................................................................7  
4 GUARANTEE ..................................................................................................................................................7  
5 PRACTICAL INFORMATION...........................................................................................................................7  
6 SETTING THE TIME CLOCK ..........................................................................................................................8  
6.1  
6.2  
SETTING THE MECHANICAL CLOCKS .................................................................................8  
SETTING THE DIGITAL CLOCK..............................................................................................9  
INSTALLERS’ INSTRUCTIONS.........................................................................................................................11  
7 DESCRIPTION...............................................................................................................................................11  
8 DIMENSIONS ................................................................................................................................................12  
9 HYDRAULIC DATA .......................................................................................................................................12  
10 INSTALLATION REQUIREMENTS................................................................................................................13  
11 INSTALLING THE BOILER............................................................................................................................17  
12 CONNECTING THE FLUE.............................................................................................................................19  
12.1  
12.2  
12.3  
12.4  
FITTING THE COAXIAL FLUE .............................................................................................................20  
FITTING THE 5” FLUE ..........................................................................................................................20  
FITTING VERTICAL FLUE ....................................................................................................................22  
FITTING THE TWIN FLUE ....................................................................................................................23  
13 ELECTRICAL CONNECTIONS .....................................................................................................................26  
14 COMMISSIONING AND TESTING................................................................................................................32  
14.1  
14.2  
14.3  
14.4  
14.5  
14.6  
14.7  
14.8  
14.9  
INITIAL PREPARATION........................................................................................................................32  
INITIAL START-UP................................................................................................................................32  
ADJUSTING THE CO2..........................................................................................................................33  
GAS CONVERSION ..............................................................................................................................33  
ADJUSTING THE MAXIMUM HEATING POWER ................................................................................33  
FITTING THE EXTERNAL SENSOR.....................................................................................................33  
EXTERNAL SENSOR SET-UP..............................................................................................................34  
COMPLETION .......................................................................................................................................34  
OPERATIONAL CHECKS .....................................................................................................................34  
14.10 INSTRUCTING THE END USER...........................................................................................................35  
15 FITTING THE CASING ..................................................................................................................................36  
16 SEQUENCE OF OPERATION.......................................................................................................................37  
CENTRAL HEATING MODE .................................................................................................................37  
17 ADJUSTMENTS AND SETTINGS.................................................................................................................38  
3
SERVICING INSTRUCTIONS  
18 REPLACEMENT OF PARTS .........................................................................................................................45  
18.1  
To Gain General Access........................................................................................................................45  
18.1.1 Removing the front panel.......................................................................................................................45  
18.1.2 Lowering the control panel.....................................................................................................................45  
18.2  
Access to the Combustion Chamber .....................................................................................................46  
18.2.1 Removing the combustion chamber front panel ....................................................................................46  
18.2.2 Removing the burner .............................................................................................................................47  
18.2.3 Removing the detection electrode .........................................................................................................47  
18.2.4 Removing the ignition electrode.............................................................................................................47  
18.2.5 Removing the fan...................................................................................................................................48  
18.2.6 Removing the gas valve.........................................................................................................................48  
18.2.7 Removing the heat exchanger...............................................................................................................49  
18.2.8 Removing the spark generator...............................................................................................................49  
18.3  
ACCESS TO THE WATER CIRCUIT ....................................................................................................50  
18.3.1 Drain down.............................................................................................................................................50  
18.3.2 Removing the 3 way valve.....................................................................................................................50  
18.3.3 Removing the 3 way valve shutter.........................................................................................................50  
18.3.5 Removing the pump...............................................................................................................................51  
18.3.6 Removing the pressure relief valve ......................................................................................................51  
18.3.7 Removing the domestic expansion vessel.............................................................................................52  
18.3.8 Removing the overheat thermostat........................................................................................................52  
18.3.9 Removing the temperature sensors (NTC’s) .........................................................................................52  
18.3.10 Removing the pressure gauge...............................................................................................................53  
18.3.11 Removing the DHW flow switch.............................................................................................................53  
18.3.12 Removing & cleaning the condensate trap............................................................................................53  
18.4  
ACCESS TO THE CONTROL SYSTEM ...............................................................................................53  
18.4.1 Removing the PCB’s..............................................................................................................................53  
18.4.2 Removing the fuses...............................................................................................................................54  
18.5  
19  
20  
21  
22  
22.1  
22.2  
22.3  
23  
24  
25  
CONNECTING THE EXTERNAL SENSOR ..........................................................................................54  
INCORRECT FUNCTION......................................................................................................................55  
GAS CONVERSION .............................................................................................................................56  
INCORRECT FUNCTION......................................................................................................................56  
MAINTENANCE INSTRUCTIONS.........................................................................................................57  
GENERAL REMARKS...........................................................................................................................57  
CLEANING THE PRIMARY EXCHANGER...........................................................................................57  
OPERATIONAL TEST...........................................................................................................................57  
SHORT SPARES LIST ..........................................................................................................................58  
TECHNICAL DATA................................................................................................................................59  
BENCHMARK COMMISSIONING CHECKLIST....................................................................................61  
SERVICE INTERVAL RECORD............................................................................................................62  
26  
INTRODUCTION  
The System A is a fully automatic, wall mounted, low water content condensing system boiler. It is a room sealed,  
fan assisted, balanced flued appliance providing central heating. It has electronic ignition and is suitable for all  
modern electrical control systems. The boiler is designed for sealed systems only and a circulating pump,  
expansion vessel together with a pressure gauge and safety valve are included within the boiler.  
The standard horizontal flue kit is suitable for lengths 300 mm minimum to 600 mm maximum and includes an  
elbow adapter that can be rotated through 360 ° . The horizontal flue can extend up to 3 metres using 1 metre  
flue extension kits. 45 ° and 90° flue bends are also available as accessories.  
The System A Plus includes a diverter valve and so can provide central heating and hot water flow for an indirect  
cylinder.  
4
USER’S INSTRUCTIONS  
1. Control panel  
31  
27 26  
29  
30  
(System Plus only)  
Fig 1  
33  
32  
34  
35  
Control panel (fig. 1)  
Connecting bracket  
Taps shown in Open position (fig. 2)  
26.- Display  
27.- On/off push button and power on indicator light  
29.- Reset push button and red indicator locking light  
39 : Gas service tap  
40 : Cylinder return valve (System Plus only)  
30.- Cylinder Hot water start button  
and temperature  
and temperature setting  
setting (System Plus only)  
41 : Central heating flow isolating valve  
42 : Central heating return isolating valve  
43 & 44: Filling taps  
31.- Central Heating start button  
32.- Menu button  
33.- Reducing button  
34.- Increasing button  
35.- Setting button  
45 : Filling loop  
41  
40  
43  
42  
44  
39  
Fig. 2  
45  
5
2. How to Use  
Switching on and filling instructions  
1. Check the pressure in the central heating system is above 0.7 bar and below 1.5 bar with the pressure gauge 16 (fig.1),  
should it be neccessary to re-pressurise the system,ensure the filling loop 45 (fig. 2) is attached, open the filling taps 43 & 44,  
the pressure gauge will now start to rise, once the pressure reads 1.0 bar, close the filling taps and disconnect the filling loop.  
2. Check that the gas service tap is opened at the gas meter and the main power is on. Green  
indicator 27  
Power ON  
3. Open the gas tap 39 (fig.2).  
4. The boiler is now ready to use.  
NOTE:  
If the boiler is left off for a long time, some air in the gas pipe can hinder the first lighting  
attempts. (please refer to Section 19 Incorrect Function, page 47)  
OPEN  
CLOSED  
Time setting  
You can set the time by using the keys underneath the display.  
Press the setting key  
keys. To alter the minutes, press the setting key  
the or keys, once the correct time has been set, press the setting key  
for 5 seconds. The hour digits on the display will begin to flash. Set the correct time by using the  
again, the minute digits will begin to flash. Set the correct time by using  
once more to accept the time.  
or  
Note: This is not a timer for Central Heating control.  
To obtain heating  
Turn the Central heating knob (30 Fig.1) between mini and maxi.  
During the setting  
set to.  
flashes and displays the temperature the knob has been  
The flashing will continue for a while after the setting and the display will then  
indicate one of the following :  
- the heating temperature when the room thermostat is ON (Calling).  
- the time when the room thermostat is OFF (Satisfied).  
Room thermostat request  
pictogram  
Tank pre-heating mode (System plus only)  
Turn the control knob 30 between min and max. During the adjustment,  
flashes.  
The flashing goes on for a while after the adjustment, then the display indicates the time.  
When DHW is drawn, the display indicates the following:  
Heating mode  
Turn the control knob 31 between min and max. During the adjustment  
flashes.  
The flashing goes on for a while after the adjustment, the display will then indicate:  
- the central heating flow temperature if the room thermostat is calling for heat.  
- the time if the room thermostat is OFF.  
Room thermostat request symbol  
Flame digit  
BURNER ON and output level  
The flame digits will increase or decrease depending on the output.  
Burner ON  
"Programming" button:  
button not activated, the domestic hot water exchanger temperature holding function is  
activated permanently.  
"Yellow"  
button activated, the temperature holding function respects the programme (11 p.m. OFF, 6 a.m. ON, original  
setting). The display indicates the following  
6
Anti-freeze and anti-sieze modes  
Provided the ON/OFF button is on (green light), the water pressure is adequate and the boiler has not shut down due to an  
error, the anti-freeze and ant-sieze operations will remain active.  
When the anti-freeze comes on, one of two codes will be displayed with the snowflake pictogram  
.
The two possible codes are 05 (pump anti-freeze) or 06 (burner anti-freeze).  
05 (Pump anti-freeze):  
When the boiler senses a temperature of 8°C or lower, the pump will run for 2 minutes, the  
boiler will then check if the flow temperature is higher than 8°C. Should the temperature  
still be between 3°C and 8°C the above process will be repeated a maximum of 10 times,  
after this the burner will light and run until a temperature of 33°C is detected (see 06  
Burner anti-freeze below).  
06 (Burner anti-freeze):  
When the boiler senses a temperature of 3°C or lower, the boiler will fire at minimum power until a temperature of 33°C is  
achieved, the pump will run for 2 minutes after the burner is switched off.  
Anti-sieze mode  
The anti-sieze mode will activate the pump for 1 minute everytime the boiler has been inactive for 23 hours.  
Note: The anti-freeze and anti-sieze modes will be automatically overriden as soon as there is a demand for heaing from the  
room thermostat or cylinder thermostat.  
The anti-freeze functions will only protect the boiler from freezing, to protect the Central Heating system it will be necessary to  
leave the boiler powered, the Central Heating knob turned on and the room thermostat set to its anti-frost setting (usually  
between 5°C and 10°C).  
3. Maintenance  
As with your car, your boiler will work more reliably and efficiently if regularly serviced. We recommend an annual service  
check. The service history of the appliance will be marked in the Service Interval Record (Section 25).  
4. Guarantee  
The manufacturer`s guarantee is for 2 years from the date of purchase. The guarantee is voidable if the appliance is not  
installed in accordance with the recommendations made herein or in a manner not approved by the manufacturer. To assist us  
in providing you with an efficient after sales service, please return the guarantee registration card enclosed with the boiler with-  
out delay.  
5. Practical information  
Cleaning the casing and control panel  
Should it be necessary to clean the casing and control panel, do so only with a damp cloth, do not use any spray polishes or  
cleaners.  
Precaution to avoid freezing  
We recommend that you contact your installer or local service centre for further advice on the actions to be taken to avoid the  
system freezing (should the boiler be turned off at the mains isolator)  
• CH system  
Choose one of the following solution :  
- 1) Drain the Central Heating system completely  
- 2) Protect the Central Heating system with anti freeze chemical products and periodically check the concentration  
- 3) Leave the Heating mode switched on and set the room thermostat to anti-freeze mode (between 5 and 10°C)  
- 4) Leave your boiler in stand-by mode, the anti-freeze device will switch on the pump and the burner if necessary.  
• DHW system  
Turn off the main cold water supply and drain the cylinder.  
7
6. Setting the time clock  
6.1  
Setting the mechanical clock  
12  
9
3
6
Fig. 3  
A
1
2
4
2
3
2
2
4
12  
2
1
C
6
I
8
1
7
B
1
6
6
0
1
1
1
1
4
3 1 3  
Fig. 4  
1. General layout  
The mechanical clock covers a 24 hour period. Each tappet represents 15 minutes A (Fig. 4). An override switch is located on  
the clock B (Fig 4).  
2. To set the time  
To set the time of day, grasp the outer edge of the dial and turn slowly clockwise until the correct time is lined up with the arrow  
C (Fig. 4).  
3. To Set the "On" and "Off" times  
The clock uses a 24hours system. e.g. 8 = 8.00 am and  
18 = 6.00 pm "ON" periods are set by sliding all tappets between the "ON" time and the "OFF" time to the outer edge of the  
dial.The tappets remaining at the centre of the dial are the "OFF" periods.  
4. For operation  
Put the selector switch B to the  
symbol to control the central heating by the clock. Put the switch B to «I» to select  
permanent operation or to «0» to turn the central heating off permanently.  
8
6. Setting the time clock (continued)  
6.2  
Setting the Digital Clock  
Manual switch  
Summer and  
winter time  
setting  
Reset  
Enter  
switching  
times  
Enter  
the hours  
Week-  
days  
flash  
Imput  
time  
Enter  
minutes  
Day  
Enter  
weekday/s  
Automatic  
Operation  
Manual  
Operation  
Continuous  
Operation  
= ON  
= ON  
= Continuously ON  
= Continuously OFF  
You can only  
return to automatic  
mode from the  
continuously-ON  
and continuously-  
= OFF  
= OFF  
The switching  
times corres-  
pond to the  
program  
If the current  
switching mode is  
changed manually,  
the next switching  
time will be  
entered.  
carried out auto-  
matically again  
according to the  
entered switching  
program.  
OFF  
modes by  
pressing the "  
key.  
switching  
"
Operating the time switch  
The steps marked with the symbol “  
” are necessary to carry out a switching program.  
Preparing for Operation  
Activate the “Res” switch (=RESET) to reset the time switch to its default setting (activate using a pencil or similar pointed  
instrument). Do this:  
- every time you wish to “reset” the time switch  
- to erase all switching times and the current time of day.  
After approximately two seconds the following display appears:  
Enter current time and weekday  
- Keep the “ ” button pressed down  
During the summer time period press the +/- 1h button once.  
Enter the hour using the “h” button  
Enter the minutes using the “m” button  
Enter the day using the “Day” button  
1 = “Monday”..............7 = Sunday  
- Release the “ ” button.  
9
6. Setting the time clock (continued)  
Entering the switching times  
You have 20 memory Iocations available. Each switching time takes up one memory location.  
Keep pressing the “Prog” button until a free memory location is shown in the display “– –:– –”.  
Programme ON or OFF with the “  
”= OFF; “ ”= ON  
” button:  
Enter the hour using “h”  
Enter the minutes using “m”  
If a switching command is to be carried out every day (1 2 3 4 5 6 7) then store using the “ ” button, otherwise select the  
day(s) it is to be carried out by using the “Day” button.  
When the day seIection is left bIank, the programmed switching instruction operates at the  
1 2 3 4 5 6 = Monday – Saturday  
same time every day  
1 2 3 4 5  
6 7  
= Monday – Friday  
=Saturday – Sunday  
Selection of single days: 1 = Mon. .............. 2 =Tues.  
Save the switching time with the “ ” button.  
The time switch enters the automatic operating mode and displays the current time of day.  
Begin any further entry of a switching time with the “Prog” switch. If your entry is incomplete, the segments not yet selected  
will blink in the display. After programming is completed, and you return the time clock to the current time display with the “  
” button, the time clock will not activate any switching instruction required for the current time. You may need to manually  
select the desired switching state with the “  
” button. Thereafter, as the unit encounters further switching instructions in  
the memory in real time, it will correctly activate all subsequent switching instructions.  
Manual Override Switch “  
With the “ ” you can change the current setting at any time. The switching program already entered is not altered.  
Reading the programmed switching times  
Pressing the “Prog” button displays the programmed switching times until the first free memory location appears in the display “–  
– : – –”.  
If you now press the “Prog” button once again, the number of free memory Iocations will be displayed, e.g. “18”. If all memory  
locations are occupied, the display “00” appears.  
Changing the programmed switching times  
Press the “Prog” button repeatedly until the switching time you want to change is displayed. You can now enter the new data. See  
point “Entering the switching times”.  
Notes on storing switching times:  
If you end your entry of the switching times by pressing the “Prog” button, then the switching time you have entered will be stored  
and the next memory location displayed.  
In addition, a complete switching command is stored automatically after around 90 seconds provided no other button is  
pressed. The time switch then enters the automatic operating mode and displays the current time again.  
Deleting individual switching times  
Press the “Prog” button repeatedly until the switching time you wish to delete is shown in the display. Then set to “– –” using the  
“h” or “m” button and keep the “ ” button pressed down for around 3 seconds. The switching time is now erased and the current  
time is displayed.  
AM / PM time display  
If you press the “+/-1h” and “h” buttons at the same time, the time display switches into the AM/PM mode.  
10  
INSTALLER’S INSTRUCTIONS  
7. Description  
1.- Steel chassis complete with expansion vessel  
2.- Sealed chamber  
1
3.- Burner and heat exchanger assembly  
4.- Air / gas connection  
5.- 24 V modulating fan  
6.- Gas valve  
24  
25  
7.- Ignition electrode  
10  
8.- Ionisation probe  
9.- Ignitor  
10.- Combustion products manifold  
11.- Siphon  
12.- Silencer  
13.- Electrical box  
14.- Pump  
2
3
9
7
16.- Pressure gauge  
17.- Three way valve  
8
18.- Automatic air separator and automatic vent  
20.- Main exchanger inlet thermistor  
21.- Main exchanger outlet thermistor  
22.- Overheat sensor  
23.- Central heating pressure relief valve  
24.- Manual air vent with pipe  
25.- Thermo fuse  
20  
4
5
22  
21  
12  
6
42  
17  
18  
13  
16  
23  
11  
14  
Fig. 5  
Fig. 6  
31  
27  
26  
29  
(System Plus only)  
30  
26.- Display  
27.- On/off push button and power on  
indicator light  
29.- Reset push button and red indicator  
locking light  
30.- DHW control knob  
and temperature  
setting (System Plus only)  
31.- Central Heating control knob  
temperature setting  
and  
32.- Menu button  
33.- Reducing button  
34.- Increasing button  
35.- Setting button  
Fig. 7  
33  
32  
34  
35  
11  
8. Dimensions  
All dimensions in mm  
I
Safety valve C/H and condensate  
Heating flow  
J
K
L
M
N
Cylinder return (System Plus only)  
Gas supply  
289  
Cold water supply  
21  
162  
Heating return  
With packaging :  
24 kW : 34 kg  
30 kW : 37 kg  
172,5  
I
121,5  
J K L M N  
4,7  
I
minimum space required 450  
32  
296  
296 (24 kW)  
360 (30 kW)  
4
390  
54 54 54 54  
J
K
L M N  
Fig. 8  
9. Hydraulic data  
The boiler is fitted with an automatic by-pass as standard.  
Pump Head Graph (15/50 & 15/60)  
0.45  
0.4  
The graph (Fig. 9) shows the development of the pressure  
available in relation to flow (on exit from the boiler T  
20°C).  
0.35  
0.3  
To ensure correct operation, the minimum flow of the  
appliance must be 300 l/h. (Thermostatic taps closed).  
30 kW  
0.25  
0.2  
Capacity of the installation.  
The water heater is fitted with a pressurised expansion  
vessel.  
0.15  
0.1  
24 kW  
Volumes :  
6 litres  
0.05  
Pressure: 0,7 bar.  
0
0
200  
400  
600  
800  
1000  
1200  
1400  
The volume of the expansion vessel in a pressurised  
appliance varies according to:  
flow rate (l/hr)  
Fig. 9  
- the average operating temperature in °C  
- the static height, which is the difference in metres  
between the highest point of the appliance and the  
expansion vessel axis).  
Pf  
t f(r
Central heating initial pressure when cold (in bar)  
2,0  
1,9  
1,8  
The minimum cold filling pressure of the appliance is 1 bar  
(recommended pressure between 1.2 and 1.7 bar).  
40°C  
1,7  
1,6  
1,5  
1,4  
1,3  
The pressure of the expansion vessel should always be  
greater than the static height (in metres) divided by 10.  
50°C  
60°C  
70°C  
1,2  
80°C  
1,1  
1,0  
20  
40  
60  
80  
100 120  
140  
160 180 200  
220 240 260  
280  
System capacity chart  
C litre  
Fig. 10  
12  
10. Installation Requirements  
Reference Standards  
such as an outhouse or closed lean-to.  
In the United Kingdom, the installation and initial start up of  
the boiler must be by a CORGI Registered installer in  
accordance with the installation standards currently in effect,  
as well as with any and all local health and safety standards  
i.e. CORGI.  
Condensing boilers have a tendency to form a plume of water  
vapour from the flue terminal due to the low temperature of the  
flue gasses. The terminal should therefore be located with due  
regard for the damage or discolouration that might occur to  
buildings in the vicinity and consideration must also be given to  
adjacent boundaries, openable windows should also be taken  
into consideration when siting the flue.  
In the Republic of Ireland the installation and initial start up of  
the appliance must be carried out by a Competent Person in  
accordance with the current edition of I.S.813 “Domestic Gas  
Installations” and the current Building Regulations, reference  
should also be made to the current ETCI rules for electrical  
installation.  
The minimum acceptable clearances are shown below:  
The installation of this appliance must be in accordance with  
the relevant requirements of the Local Building Regulations,  
the current I.E.E. Wiring Regulations, the by-laws of the local  
water authority, in Scotland, in accordance with the Building  
Standards (Scotland) Regulation and Health and Safety  
document No. 635, “Electricity at Work Regulations 1989”  
and in the Republic of Ireland with the current edition of I.S.  
813 and the Local Building Regulations (IE).  
E
E
For detailed information on the installation of Condensing  
boilers, reference should be made to the ODPM Guide to  
the Condensing Boiler Assesment Procedure for  
Dwellings.  
Fig. 11  
A - Directly below an open window or other opening 300  
C.O.S.H.H.  
Materials used in the manufacture of this appliance are non- B - Below gutters, solid pipes or drain pipes  
75  
200  
75  
hazardous and no special precautions are required when  
servicing.  
C - Below eaves  
D - From vertical drain pipes and soil pipes  
E - From internal or external corners  
F - Above ground on a public walkway or patio  
G - From a surface facing a terminal  
H - From a terminal facing a terminal  
I - Vertically from a terminal in the same wall  
J - Horizontally from a terminal in the same wall  
K - Horizontally from an opening window  
L - Fixed by vertical flue terminal  
300  
Codes of Practice  
2100  
2500  
2500  
1500  
300  
Installation should also comply with the following British  
Standards Codes of Practice:  
BS 7593:1992  
Treatment of water in domestic hot  
water central heating systems  
BS 5440-1:2000 Flues  
BS 5440-2:2000 Air Supply  
300  
BS 5449:1990  
BS 6798:2000  
Forced ciculation hot water systems  
NOTE: THE FLUE MUST NOT BE INSTALLED IN A PLACE LIKELY TO  
CAUSE A NUISANCE.  
Installation of gas fired hot water  
boilers of rated input not exceeding  
70kW  
It may be necessary to protect the terminal with a guard, if this is  
the case it will be necessary to purchase a stainless steel terminal  
guard. Reference should be made to the Building Regulations for  
guidance.  
BS 6891:1998  
Installation of low pressure gas pipe up  
to 28mm  
IEE Wiring Regulations  
Specification for expansion vessels  
Installation of L.P.G.  
BS 7671:2001  
BS 4814:1990  
BS 5482:1994  
Ventilation  
and in the Republic of Ireland in accordance with the  
following codes of practice  
The room in which the boiler is installed does not require specific  
ventilation. If it is installed in a cupboard or compartment  
permanent ventilation is not required for cooling purposes.  
I.S. 813  
Domestic Gas Installations  
Gas Supply  
Avoid installing the boiler where the air inlet can be polluted  
by chemical products such as chlorine (swimming pool area),  
or ammonia (hair-dresser), or alkaline products (launderette)  
The gas installation and soundness testing must be in  
accordance with the requirements of BS 6891. Ensure that  
the pipe size is adequate for demand including other gas  
appliances on the same supply.  
Flue  
Detailed information on flue assembly can be found in Section  
12 “Connecting the flue”.  
The boiler must be installed so that the flue terminal is  
exposed to the free passage of external air at all times and  
must not be installed in a place likely to cause nuisance. It  
must not be allowed to discharge into another room or space  
Electrical Supply  
The appliance requires an earthed 230V - 50 Hz supply and  
must be in accordance with current I.E.E. regulations.  
13  
10. Installation Requirements (continued)  
It must also be possible to be able to completely isolate the  
appliance electrically. Connection should be via a 3 amp  
fused double-pole isolating switch with a contact separation  
of at least 3 mm on both poles. Alternatively, a fused 3 Amp.  
3 pin plug and unswitched socket may be used, provided it is  
not used in a room containing a bath or shower. It should  
only supply the appliance.  
MTS suggests the use of suitable anti-freeze products such  
as Fernox ALPHI 11, which will prevent rust and incrustation  
taking place.  
Periodically check the pH of the water/anti-freeze mixture of  
the boiler circuit and replace it when the amount measured is  
out of the range stipulated by the manufacturer ( 7 < pH < 8).  
DO NOT MIX DIFFERENT TYPES OF ANTI-FREEZE  
The boiler is suitable for sealed systems only. The maximum  
working pressure for the appliance is 6 bar. All fittings and  
pipework connected to the appliance should be of the same  
standard. If there is a possibility of the incoming mains  
pressure exceeding 6 bar, particularly at night, then a  
suitable pressure limiting valve must be fitted.  
In under-floor systems, the use of plastic pipes without  
protection against penetration of oxygen through the walls  
can cause corrosion of the systems metal parts  
(metal piping, boiler, etc), through the formation of oxides  
and bacterial agents.  
The boiler is designed to provide Central Heating on demand  
to a Central Heating system and to heat an Indirect Hot  
Water Storage Cylinder.  
To prevent this problem, it is necessary to use pipes with an  
“oxygen-proof barrier”, in accordance with standards DIN  
4726/4729. If pipes of this kind are not used, keep the  
system separate by installing heat exchangers of those  
with a specific system water treatment.  
Flushing and Water Treatment  
The boiler is equipped with a stainless steel heat exchanger.  
IMPORTANT  
The detailed recommendations for water treatment are given  
in BS 7593:1992 (Treatment of water in domestic hot water  
central heating systems); the following notes are given for  
general guidance;  
Failure to carry out the water treatment procedure will  
invalidate the appliance warranty.  
Location  
The boiler can be installed on any suitable internal wall.  
Provision must be made to allow the correct routing of the flue  
and siting of the terminal to allow the safe and efficient removal  
of the flue products. A compartment or cupboard may be used  
provided that it has been purpose-built or modified for the  
purpose. It is not necessary to provide permanent ventilation  
for cooling purposes. Detailed recommendations are given in  
BS 5440 pt 2. If it is proposed that it is installed in a timber  
framed building then reference should be made to British Gas  
Document DM2, or advice sought from CORGI.  
If the boiler is installed on an existing system, any  
unsuitable additives must be removed.  
Under no circumstances should the boiler be fired before the  
system has been thoroughly flushed; the flushing procedure  
must be in line with BS7593:1992.  
We highly recommend the use of a flushing detergent  
appropriate for the metals used in the circuit. These include  
cleansers produced by Fernox and BetzDearborn, whose  
function is to dissolve any foreign matter that may be in the  
system;  
Where a room sealed appliance is installed in a room  
containing a bath or shower, the appliance and any  
electrical switch or appliance control, utilising mains  
electricity should be situated specifically in accordance  
with current IEE Wiring Regulations.  
In hard water areas or where large quantities of water are in  
the system the treatment of the water to prevent premature  
scaling of the main heat exchanger is necessary.  
For unusual locations, special procedures may be necessary.  
BS 6798:2000 gives detailed guidance on this aspect.  
The formation of scale strongly compromises the efficiency of  
the thermic exchange because small areas of scale cause a  
high increase of the temperature of the metallic walls and  
therefore add to the thermal stress of the heat exchanger.  
Condensate Discharge  
The condensate discharge hose from the boiler must have a  
continuous fall of 2.5o and must be inserted by at least 50mm  
into a suitable acid resistant pipe - e.g. plastic waste or  
overflow pipe. The condensate discharge pipe must have a  
minimum diameter of 22mm, must have a continuous fall and  
preferably be installed and terminated to prevent freezing.  
The discharge pipe must be terminated in a suitable position:  
Demineralised water is more aggressive so in this situation it  
is necessary to treat the water with an appropriate corrosion  
inhibitor.  
Any treatment of water by additives in the system for frost  
protection or for corrosion inhibition has to be absolutely  
suitable for all the metals used in the circuit.  
i) Connecting into an internal soil stack (at least 450mm  
above the invert of the stack). A trap giving a water seal  
of at least 75mm must be incorporated into the pipe run,  
there also must be an air break upstream of the trap.  
The use of a corrosion inhibitor in the system such as Fernox  
MB-1, BetzDeaborn Sentinel X100 or Fernox System  
Inhibitor is recommended to prevent corrosion (sludge)  
damaging the boiler and system;  
ii) Connecting into the waste system of the building such as  
a washing machine or sink trap. The connection must be  
upstream of the washing machine/sink. If the connection  
is down stream of the waste trap then an additional trap  
giving a minimum water seal of 75mm and an air break  
must be incorporated in the pipe run, as above.  
If anti-freeze substances are to be used in the system, check  
carefully that they are compatible with the metals used in the  
circuit.  
14  
10. Installation Requirements (continued)  
iii) Terminating into a gully, below the grid level but above  
the water level.  
fall. The total length of external pipe used should not exceed  
3 metres.  
iv) Into a soakaway.  
Some examples of the type of condensate terminations can  
be found below.  
NOTE: If any condensate pipework is to be installed  
externally then it should be kept to a minimum and be  
insulated with a waterproof insulation and have a continuous  
1.  
Internal termination of condensate drainage pipe to internal stack  
2.  
External termination of condensate drainage pipe via internal discharge branch  
(e.g. sink waste) and condensate siphon  
15  
10. Installation Requirements (continued)  
3. External termination of condensate drainage pipe via internal discharge  
branch (e.g. sink waste - proprietary fitting)  
4. External termination of condensate drainage pipe via condensate siphon  
16  
11. Installing the Boiler  
Please check that you are familiar with the installation requirements before commencing work (Section 10).  
The installation accessories described in the following list are included in the boiler packaging:  
- Hanging bracket  
- A paper template (showing the dimensions of the boiler with 5 mm side clearances)  
- Connection tails and valves  
- Screws and washers  
- Connection washers  
- Installation, Servicing and Operating Instructions  
- Air Inlet Header (for use with twin flue pipe)  
- Guarantee Card  
Method of positioning the boiler on the wall.  
The paper template can be used to ensure the correct positioning of kitchen cabinets etc. It also details the commissioning  
instructions.  
The paper template has to be fixed to the wall and used to locate the position of the hanging bracket and the centre for the flue  
hole.  
Drill and plug the wall and secure the hanging bracket using the screws provided. Remove the boiler from its packaging as  
shown in Fig. 12, unscrew the clamp locking bolt A and remove the casing (Fig. 13).  
Place the boiler on the wall on the hanging bracket (Fig. 14).  
NOTE: THE APPLIANCE MUST NOT BE FITTED ON A COMBUSTIBLE WALL SURFACE.  
Connecting the boiler to the system  
-
-
Remove the boiler casing as described in Section 18.  
Push in the tabs “P” (Fig. 14) on either side of the boiler and pivot the electrical box forward to gain access to the valve  
connections  
-
Remove the caps and connect the valves to the boiler using the washers provided in the plastic bag.  
2 x fibre washers for the C/H flow and return.  
1 x rubber washer for gas connection  
Safety valve discharge  
The pressure relief valve tube is made of copper. It should terminate below the boiler safely outside the premises. Care should  
be taken that it does not terminate over an entrance or window or where a discharge of heated water could endanger  
occupants or passers by.  
Fill the Central Heating and DHW system and bleed air from the system as described in Section 14 .  
The system should be carefully checked for leaks, as frequent refilling could cause premature system corrosion or  
unnecessary scaling of the heat exchanger. The condensate pipe from the siphon (11 Fig. 6) should be connected to a drain  
as described in the relevant Brittish regulations.  
Pay special attention to not bend the plastic condensate drain pipe in such a way as to cause the flow to be interrupted. Please  
use exclusively drain pipe material compatible with condensate products. (refer to BS 6798 : 2000)  
The condensate flow can reach 2 litres / hour; because of the acidity  
of the condensate products (Ph close to 2), take care before  
operation.  
Fitting the Horizontal Flue  
Attention ! Before starting the boiler, the trap (11 Fig. 6) must be  
filled with water. Before fitting the flue onto the boiler, pour 1/4  
litre of water into the exhaust pipe as shown in Fig. 15 (page 19).  
Instructions on fitting the flue can be found in Section 12.  
IMPORTANT!!  
Use only the specific condensation flue kit supplied by MTS  
(GB) Limited.  
17  
11. Installing the Boiler (continued)  
A
A
Fig. 12  
1
2
Fig. 13  
P
P
Fig. 14  
Fig. 15  
18  
12. Connecting the Flue  
The boiler should only be installed with a flue system supplied by MTS (GB) Limited.  
These kits are supplied separately to the appliance in order to respond to different installation solutions. For more information  
with regard to the inlet/outlet accessories consult the accessory catalogue. The boiler is supplied ready for connection to a  
concentric flue system.  
NOTE: SEE PAGE 24 FOR MAXIMUM AND MINIMUM FLUE RUNS (TABLES A, B AND C)  
IMPORTANT!!  
BEFORE CONNECTING THE FLUE, ENSURE THAT 1/4 LITRE OF  
WATER HAS BEEN POURED INTO THE EXHAUST CONNECTION  
TO FILL THE CONDENSATE TRAP (FIG. 16). SHOULD THE  
TRAP BE EMPTY THERE IS A TEMPORARY RISK OF FLUE  
GASSES ESCAPING INTO THE ROOM.  
Fig. 16  
Important  
Warning  
Ensure that the flue is not blocked.  
Ensure that the flue is supported and  
assembled in accordance with these  
instructions.  
The exhaust gas ducts must not be in contact with or close to inflammable  
material and must not pass through building structures or walls made of  
inflammable material.  
When replacing an old appliance, the flue system must be changed.  
Ø 60/100 mm  
5
162  
Fig. 17  
Installation without extension  
150 mm  
Fig. 18  
Installation with extension  
slope  
*
*
sl  
o
pe
5
m
m
p
er metre
19  
12.1 Fitting the coaxial flue (Ø 60/100 Horizontal)  
CONTENTS:  
1X SILICONE O-RING (60mm)  
O
1X ELBOW (90 )  
2X WALL SEALS (INTERNAL & EXTERNAL)  
1X FLUE PIPE INCLUDING TERMINAL (1 METRE - 60/100)  
1X FLUE CLAMP  
1X SCREWS  
1x Seal  
Once the boiler has been positioned on the wall, insert the elbow into the socket and rotate to the required position. NOTE: It is  
possible to rotate the elbow 360o on its vertical axis.  
Using the flue clamp, seals and screws supplied (Fig 19) secure the elbow to the boiler.  
The 1 metre horizontal flue kit (3318073) supplied is suitable for an exact X dimension of 815mm.  
Measure the distance from the face of the external wall to the face of the flue elbow (X - Fig 17), this figure must now be  
subtracted from 815mm, you now have the total amount to be cut from the plain end of the flue.  
Draw a circle around the outer flue and cut the flue to the required length taking care not to cut the inner flue, next cut the inner  
flue ensuring that the length between the inner and outer flue is maintained. (Fig 19).  
e.g.  
X = 555mm  
815-555 = 260mm (Length to be cut from the plain end of the flue).  
Once cut to the required length, ensure that the flue is free from burrs and reassemble the flue. If fitting the flue from inside of  
the building attach the grey outer wall seal to the flue terminal and push the flue through the hole, once the wall seal has  
passed through the hole, pull the flue back until the seal is flush with the wall. Alternatively, the flue can be installed from  
outside of the building, the grey outer seal being fitted last.  
Clamp  
Screws  
Seal  
Fig. 19  
12.2 Fitting the 5” Flue (Ø 80 / 125 Horizontal/vertical)  
Should the flue require extending, the flue connections are push fit, however, one flue bracket should be used to secure each  
metre of flue.  
NOTE: SEE PAGE 24 FOR MAXIMUM AND MINIMUM FLUE RUNS.  
Once the boiler has been positioned on the wall, it is necessary to insert the Ø 80/125 adaptor (FIG. 20) for both horizontal and  
vertical flue runs into the boiler flue socket (not supplied with flue kit - Part No 3318095).  
Push the adaptor onto the boilers flue connection, grease the seals then add extensions or elbows as required, secure the  
adaptor, using the clamp and screws provided.  
To fit extensions or elbows it is first necessary to ensure that the lip seal is fitted correctly into the inner flue, once verified, it is  
simply necessary to push them together, no clamps are necessary to secure the flue components.  
Before proceeding to fit the flue, ensure that the maximum flue length has not been exceeded (See the tables on Page 23) and  
that all elbows and bends have been taken into consideration, the maximum flue length is 10 metres, for each additional 90o  
elbow 1 metre must be subtracted from the total flue length, and for each 45o 0.5 metres must be subtracted from the total flue  
length (the height of the vertical adaptor and a 45o bend can be seen in Fig. 21 and a 90o bend in Fig. 22).  
NOTE: DO NOT CUT THE VERTICAL FLUE KIT.  
20  
162  
Fig. 20  
Fig. 21  
Fig. 22  
21  
12.3 Fitting the Coaxial Flue (Ø 60 / 100 Vertical)  
NOTE: SEE PAGE 24 FOR MAXIMUM AND MINIMUM FLUE RUNS.  
CONTENTS:  
1X SILICONE O-RING (60mm)  
1X CONICAL ADAPTOR (60/100mm)  
1X VERTICAL FLUE KIT (80/125mm)  
3X SCREWS  
The vertical flue kit is supplied with a specially designed weather proof terminal fitted, it can be used either with a flat roof or a  
pitched roof.  
The Vertical flue kits useable lengths with the pitched roof flashings are indicated in Fig. 23.  
Before proceeding to fit the flue, ensure that the maximum flue length has not been exceeded (See the tables on Page 24) and  
that all elbows and bends have been taken into consideration, the maximum flue length is 4 metres, for each additional 90o  
elbow 1 metre must be subtracted from the total flue length, and for each 45o 0.5 metres must be subtracted from the total flue  
length (the height of the vertical adaptor and a 45o bend can be seen in Fig. 24).  
Mark the position of the flue hole in the ceiling and/or roof (see Fig. 23 for the distance from the wall to the centre of the flue).  
Cut a 120 mm diameter hole through the ceiling and/or roof and fit the flashing plate to the roof.  
DO NOT cut the vertical flue kit.  
To connect the vertical flue kit directly to the boiler, place the vertical starter kit (Part No. 3318079) (see Figs. 23 and 24) onto  
the exhaust manifold and secure with the clamp, fit the vertical adaptor onto the vertical starter kit (note: there is no need to  
use a clamp to secure this as it is a push fit connection), the vertical flue kit must then be inserted through the roof flashing, this  
will ensure that the correct clearance above the roof is provided as the terminal is a fixed height.  
Should extensions be required, they are available in 1 metre (Part No. 3318077), 500mm (Part No. 3318078) and 160mm  
lengths, they must be connected directly to the vertical starter kit before connecting the adaptor to allow the vertical flue kit to  
be fitted. In the event that extension pieces need to be shortened, they must only be cut at the male end and it must be  
ensured that the inner and outer flue remain flush.  
When utilising the vertical flue system, action must be taken to ensure that the flue is supported adequately to prevent the  
weight being transferred to the appliance flue connection by using 1 flue bracket per extension.  
When the flue passes through a ceiling or wooden floor, there must be an air gap of 25 mm between any part of the flue  
system and any combustible material. The use of a ceiling plate will facilitate this. Also when the flue passes from one room  
to another a fire stop must be fitted to prevent the passage of smoke or fire, irrespective of the structural material through  
which the flue passes.  
162  
Fig. 24  
Fig. 23  
22  
12. Connecting the flue (continued)  
12.4 Fitting the twin pipe (Ø80/80)  
NOTE: SEE PAGE 24 FOR MAXIMUM AND MINIMUM FLUE RUNS (TABLE C)  
Where it is not possible to terminate the flue within the distance permitted for coaxial flues, the twin flue pipe can be used by  
fitting a special adaptor to the flue connector and using the aperture for the air intake located on top of the combustion  
chamber.  
Always ensure that the flue is adequately supported, avoiding low points. (MTS supply suitable clamps as Part No. 705778).  
To utilise the air intake it is necessary to:  
1) Take the air intake cover off  
2) Assemble the flange on the header supplied with the boiler  
3) Insert the restrictor if necessary, on the tube or the elbow  
4) Insert the header on the tube or the elbow up until the lower stop  
(you do not have to use the washer).  
5) Insert the elbow/header in the boiler air intake hole and fasten it with screws  
The twin flue pipes can be fitted with or without additional elbows and need no clamps, simply ensure that the red o-ring is  
inserted in the female end of the flue pipe and push the extension piece fully into the previous section of flue pipe or elbow,  
check that the o-ring is not dislodged when assembling the flue.  
Twin pipe can also be converted back to Coaxial flue to enable vertical termination with a coaxial kit by using the pipe bridge  
(Twin - Coaxial Adaptor - Part No. 705767). When running the twin flue pipe vertically.  
It is not recommended that the pipe bridge for horizontal termination, however in the unlikely event that this proves to be a  
necessity it is extremely important that the entire flue has a fall of 5mm in every metre back to the boiler, and where the 60mm  
inner flue of the concentric terminal connects to the pipe bridge, this point must be adequately sealed with silicone sealant to  
avoid condense leakage at this point.  
When siting the twin flue pipe, the air intake and exhaust terminals must terminate on the same wall, the centres of the  
terminals must be a minimum of 280 mm apart and the air intake must not be sited above the exhaust terminal. The air intake  
pipe can be run horizontally, however, the terminal and the final 1 metre of flue must be installed with a fall away from the  
boiler to avoid rain ingress.  
It is also strongly recommended that the air intake pipe run be constructed of insulated pipe to prevent condense forming on  
the outside of the tube.  
The maximum permissible flue length for twin flue is dependent on the type of run used.  
For flue runs with the intake and exhaust pipes under the same atmospheric conditions (TYPE 4) the maximum length is 60  
metres (24kW and 30kW), for runs with the terminals under different atmospheric conditions (TYPE 5) the exhaust terminal  
must extend 0.5 metres above the ridge of the roof (this is not obligatory if the exhaust and air intake pipes are located on the  
same side of the building). For TYPE 5 also, the maximum permissible combined length is 60 metres (24kW and 30kW).  
The maximum length is reached by combining the total lengths of both the air intake and exhaust pipes. Therefore a maximum  
length of 60 metres for example, will allow a flue run of 30 metres for the air intake and 30 metres for the exhaust pipes, also  
for each 90o elbow 2.2 metres must be subtracted from the total length and for each 45o elbow 1.4 metres must be subtracted  
from the total flue length.  
Some of the acceptable flue configurations are detailed page 24.  
For further information relating to flue runs not illustrated, please contact the Technical Department on 0870 241 8180.  
B23  
162  
162  
123,5  
C53  
Fig. 25  
Fig. 26  
23  
12.4 Fitting the twin pipe flue (Ø80/80) (continued)  
123,5  
25  
Fig. 27  
Fig. 28  
60 mm  
In the event that twin flue pipes are used, and the boiler has a side clearance of less than 60mm from the wall, it is necessary  
to cut a larger diameter hole for the flue pipe, this should be ø10 cm, this will then allow for easier assembly of the air intake  
elbow and the tube outside the wall (see Fig. 28).  
Concentric outlet  
60/100  
24 , 30 kW  
(Type 1, Type 2, Type 3)  
Length  
equivalency for  
Min length  
0.3 m  
Max. length  
10m  
45o  
TABLE  
A
0.5 m  
elbow  
90o  
1 m  
elbow  
Concentric outlet  
80/125  
Min length  
0.3 m  
Max. length  
30 m  
24 , 30 kW  
(Type 1)  
24 , 30 kW  
45o  
0.5 m  
elbow  
TABLE  
B
90o  
elbow  
0.3 m  
35 m  
1 m  
(Type 2, Type 3)  
Twin flue outlet  
24 , 30 kW  
Min length  
10 m  
Max. length  
45o  
TABLE  
C
Type 4  
80/80  
Type 5  
80/80  
70 m  
1.4 m  
elbow  
(35m air / 35m exhaust)  
70 m  
90o  
10 m  
2.2 m  
elbow  
(35m air / 35m exhaust)  
For coaxial systems, the maximum development value, mentioned in the table above also takes into account an elbow.  
For twin flue systems the maximum development value, mentioned in the table includes the exhaust gas/air intake terminal.  
Type 5 outlets should respect the following instructions:  
1- Use the same ø 80 mm flue pipes for the gas intakes and exhaust gas ducts.  
2- If you need to insert elbows in the gas intake and exhaust gas ducts, you should consider for each one the equivalent length  
to be included in the calculation of developed length.  
3- The exhaust gas duct should jut above the roof by at least 0.5 m.  
4- The intake and exhaust gas ducts in Type 5 must be installed on the same wall, or where the exhaust is vertical and the air  
intake horizontal, the terminals must be on the same side of the building.  
24, 30 & 35 FF  
70  
60  
50  
140  
120  
100  
Twin flue length diagram  
(24 and 30 kW)  
40  
30  
20  
10  
0
80  
60  
40  
20  
0
Working area  
0
10  
20  
30  
40  
50  
60  
Air inlet length in meter  
24  
12.4 Fitting the twin pipe flue (Ø80/80) (continued)  
TYPE 1  
TYPE 2  
TYPE 3  
TYPE 4  
TYPE 5  
NOTE: DRAWINGS ARE INDICATIVE OF FLUEING OPTIONS ONLY.  
AIR INTAKE MUST NOT BE  
FITTED ABOVE THE EXHAUST  
AIR INTAKE  
EXHAUST  
AIR INTAKE  
Fig. 29  
25  
13. Electrical connections  
Making the Electrical Connections  
Hinge down the electrical box to gain access to the  
electrical connections. Push in the tabs P (Fig. 30)  
on either side of the boiler and pivot the box for-  
ward.  
Remove the PCB cover (see Section 18.4).  
Connect the live neutral and earth wires to the main  
cable.  
P
If using a room thermostat or other external control,  
they can be connected in place of the link on the ter-  
minal block (Diagram A- Fig. 32).  
Note: Use only controls designed for voltage free  
switching or 24V supply. Do not connect to a 230V  
supply, and do not run 230v cables alongside the  
low voltage cables.  
P
Fig. 30  
All necessary settings for room thermostat opera-  
tions are described in Section 17 ADJUSTMENTS  
AND SETTINGS.  
System A Plus  
System A  
Cylinder  
thermistor  
S
S
F
D
J1  
Cable 230 V 2P + T  
J12  
System A Plus  
change the EEPROM on PCB  
J12  
T
J1  
26  
4
1
LEGEND  
1
NTC Connectors  
2
3
4
5
6
7
8
9
Display Connectors  
EEPROM Button  
24V DC Supply  
Fan Connector  
Flame Detection Connector  
Fuses 2A 230V (X2)  
230V Connector  
3
2
Auxillary 230V Connector  
10 Actuators 230V Connector  
11 Time Clock Connector (Internal)  
12 Room Thermostat Connector  
13 Remote Control Connector  
14 Under Floor Heating Connector  
15 Not Used  
15  
Fig. 31  
5
14  
10  
6
7 9  
8
12  
11  
13  
-
-
If a remote time clock is to be fitted, using a volt-free switching time clock, remove the link wire and connect the  
switching wires from the time clock following points above (see also Diagram B Fig. 32).  
If using an external time clock and room thermostat, remove the link wire and connect in series as above (see also  
Diagram C Fig. 32).  
Live and Neutral connections to operate the clock motor must be taken from a suitable source.  
Connector 11 (Fig. 31), is provided for connecting an optional integral time clock or programmer, for fitting instructions, please  
refer to those provided with the clock or page 8 of this manual.  
CONNECTOR 12  
CONNECTOR 12  
CONNECTOR 12  
Fig. 32  
27  
13. Electrical connections (continued)  
13.1 Fitting the mechanical and digital time clocks  
To fit the integral time clock it is necessary to proceed as  
follows;  
-
-
-
Isolate the electical supply to the appliance;  
Remove the front panel as described in Section 18.1.1;  
Remove the plastic cover on the right hand side (Fig. 33)  
and pull out the 4 wires (Fig. 34);  
-
Connect the time clock wires as follows;  
MECHANICAL MODEL (Fig. 44)  
Red Wire  
Black Wire  
Black Wire  
Grey Wire  
-
-
-
-
Contact 1  
Contact 2  
Contact 3  
Contact 5  
Fig. 33  
NOTE: THE TWO BLACK WIRES ON CONTACTS 2 & 3 CAN BE REVERSED  
DIGITAL MODEL (Fig. 36)  
Red Wire  
Black Wire  
Grey Wire  
-
-
-
Contact 1  
Contact 2  
Contact 3  
NOTE: SECOND BLACK WIRE IS NOT CONNECTED.  
-
Push the clock back into the panel and refit the casing  
panel (Fig. 37).  
Fig. 34  
Fig. 35  
5
4 3  
1
2
G
R
B
3
1
2
G
R
B
Fig. 36  
Fig. 37  
28  
13. Electrical Connections (continued)  
13.2 Connecting Zone Valves (System A)  
The boiler can be connected to a central heating system that uses  
two zone valves to allow connection to an indirect storage cylinder.  
There are two wiring diagrams shown, one for the connection to an  
Unvented Cylinder (Diagram. A) and one for connection to an open  
vented cylinder (Diagram B).  
In both cases the boiler connection is shown as ROOM, which  
relates to the terminal on the PCB for external controls (see 12 FIG.  
31).  
When connecting the boiler to an external cylinder do not run 240V  
cables and the cables for the ROOM terminal (Fig. 38) together, use  
separate cables to prevent induced voltage on the low voltage  
switching circuit.  
*
NOTE: THE USE OF A ‘Y’ PLAN SYSTEM IS NOT POSSIBLE WITH THE  
SYSTEM A BOILER DUE TO THE LOW VOLTAGE SWITCHING OF THE  
APPLIANCE.  
* IMPORTANT!!  
ENSURE THAT A BALANCING VALVE IS FITTED ON THE  
CYLINDER RETURN AND BALANCED CORRECTLY AT  
COMMISSIONING STAGE.  
FIG. 38  
29  
WIRING DIAGRAM FOR CONNECTION TO AN  
OPEN VENTED CYLINDER  
DIAGRAM B  
30  
WIRING DIAGRAM FOR CONNECTION TO AN MTS  
UNVENTED CYLINDER  
DIAGRAM A  
31  
14. Commissioning and Testing  
14.1 Initial preparation  
MTS (GB) Limited support the  
Sections 24 and 25 (pages 60 and 61) of this manual the  
The detailed recommendations for water treatment are given  
in BS 7593:1992 (Treatment of water in domestic hot water  
central heating systems); the following notes are given for  
general guidance;  
initiative. In  
Commissioning Checklist and Service Interval  
Record can be found. It is important that this is completed in  
the presence of your customer, they are shown how to use it,  
and it is signed by them. Please instruct your customer that  
they must have this manual with them whenever they contact  
a service engineer or us.  
If the boiler is installed on an existing system, any unsuitable  
additives must be removed;  
Under no circumstances should the boiler be fired before the  
system has been thoroughly flushed; the flushing procedure  
must be in line with BS7593:1992.  
Preliminary electrical system checks to ensure electrical  
safety must be carried out by a competent person i.e.  
polarity, earth continuity, resistance to earth and short circuit.  
Firstly fill the central heating system with the power off, and  
flush through cold, fill the central heating system again,  
adding a flushing detergent, run the boiler on central heating  
until it reaches its operating temperature and flush the  
system, refill the system with a suitable corrosion inhibitor,  
FILLING THE HEATING SYSTEM:  
Remove the front casing panel and lower the control panel as  
described in Section 18.1 (page 41).  
Open the central heating flow and return cocks supplied with  
the connection kit;  
Unscrew the cap on the automatic air release valve one full  
turn and leave open permanently;  
Close all air release valves on the central heating system;  
Gradually open the valves at the filling point (filling loop) until  
water is heard to flow, do not open fully;  
NOTE: FAILURE TO CARRY OUT THE FLUSHING PROCEDURE WILL  
RESULT IN THE WARRANTY BECOMING VOID.  
The checks to be run before initial start-up are as  
follows:  
Open each air release tap starting with the lowest point and  
close them only when clear water free of air is visible;  
Purge the air from the pump by unscrewing the pump  
plug anti-clockwise, also manually rotate the pump shaft  
in the direction indicated by the pump label to ensure the  
pump is free;  
Refit the pump plug;  
Continue filling the system until at least 1.5 bar registers on  
the pressure gauge;  
14.2 Initial start-up  
1. Make sure that:  
- The screw on the automatic air valve has been loosened  
when the system is full;  
- CAUTION: It is very important to fully bleed the main heat  
exchanger of air when filling the boiler.  
You must continue to bleed the heat exchanger from the  
manual vent 24 (on the top of the heat exchanger), and  
pump through the automatic air vent 18 fig.6, through  
several central heating and hot water cycles to ensure the  
air is fully bled from the system.  
Inspect the system for water soundness and remedy any  
leaks discovered.  
FILLING OF THE DHW SYSTEM:  
Close all hot water draw off taps;  
Close the manual vent after bleeding.  
Open the cold water inlet cock supplied with the connection  
kit;  
Slowly open each draw off tap and close them only when  
clear water, free of bubbles, is visible.  
24  
GAS SUPPLY:  
Inspect the entire installation including the gas meter and test  
for soundness. The entire installation should be in  
accordance with the relevant standards. In GB this is BS  
6891 and in IE this is the current edition of I.S.813.  
- If the water pressure in the system is below 1.5 bar, bring  
it up to the appropriate level;  
- Ensure that the gas cock is closed;  
The connection on the the appliance is a 15mm copper tail  
located at the rear of the gas service cock (39 Fig. 2 - page  
5)  
- Make sure that the electrical connection has been made  
properly and that the earth wire is connected to an  
efficient earthing system;  
- Supply power to the boiler by pushing the on/off button 27  
(Fig. 1) the green led indicator light will illuminate;  
- Turn the central heating control knob 30 (Fig. 1) to  
maximum and switch the time clock (if fitted) to constant  
and turn up the room thermostat (where fitted);  
- After 7 seconds, the boiler will signal a shutdown due to  
ignition failure. Leave the boiler as it is until all the air has  
been bled from the system;  
If the gas supply serves other appliances, ensure that an  
adequate supply is available both to the boiler and the other  
appliances when they are in use at the same time.  
Pipe work must be of an adequate size. Pipes of less than  
22mm should not be used.  
Open the gas cock (supplied with the connection kit) to the  
appliance and check the gas connection on the appliance for  
leaks.  
- Loosen the cap on the head of the pump to eliminate any  
air pockets;  
- Repeat the procedure for bleeding the radiators of air;  
- Open the hot water taps for a short period;  
- Check the system pressure and , if it has dropped, open  
the filling loop again to bring the pressure back up to 1.5  
bar;  
WATER TREATMENT:  
The boiler is equipped with a stainless steel heat exchanger.  
32  
14. Commissioning and testing (continued)  
14.4 Gas Conversion  
14.3 Adjusting the CO2  
To convert from Natural Gas (G20) to LPG (G31), it is  
necessary to insert a diaphragm and restrictor between the  
gas valve and air/gas arm.  
2. Make sure that all radiator valves are open;  
3. Turn on the gas cock and check the seals on the  
connections with any approved soap solution and  
eliminate any leaks;  
Once the conversion has been made, the CO2 setting will  
need to be checked as described in Section 14.3, for LPG  
the CO2 reading should be 10% +/- 0.2% with the front case  
fitted).  
4. Press the reset button 29 (Fig. 1) the boiler will re-attempt  
ignition. If the burner does not light the first time, wait 1  
minute and repeat the procedure;  
5. Check the minimum and maximum CO2 values and gas  
rates;- Adjust if necessary as indicated in Section 14.3  
(page 29).  
To convert from LPG (G31) to Natural Gas (G20), it is  
necessary to remove the diaphragm and restrictor from  
between the gas valve and air/gas arm.  
Once the conversion has been made, the CO2 setting will  
need to be checked as described in Section 14.3, for NG the  
CO2 reading should be 9.2% +/- 0.2% (with the front case  
fitted).  
14.3 Adjusting the CO2  
1. Remove the casing panel as described in Section 18.1  
(page 41);  
2. Connect a manometer to the inlet test nipple on the gas  
valve, turn on a hot tap and ensure the inlet working  
pressure is 20mbar. If correct proceed as follows;  
3. Turn on the combustion analyser, remove the combustion  
test point plug Q (Fig. 39) and insert the analyser probe  
into the test point;  
Adjustment screw  
4. Turn on a hot tap and ensure that the boiler is firing.  
5. Access the setting menu by pressing the  
and  
keys for 5 seconds the  
display;  
icon will be shown in the  
6. Press the menu button  
and press the  
four times to access Menu 5  
setting button once to switch the  
output of the boiler to maximum (two digits will be flashing  
indicating the temperature of the boiler). There will be a  
cursor at the top of the display indicating the boiler is at  
maximum output. If the cursor is at the bottom of the  
Fig. 40  
14.5 Range rating the maximum heating  
power  
display (indicating minimum output) press the  
the change to maximum output;  
button  
7. If necessary adjust the screw on the gas valve (Fig. 40) to  
set the CO2 to 8.9% +/- 0.2% (NG) or 9.7% +/- 0.2%  
(LPG);  
To adjust the maximum heating power it is necessary to  
access the settings menu by pressing  
the  
and  
buttons together for five seconds, and proceed as follows;  
8. Press the setting button  
once to set the combustion  
control rate mode to minimum, and, if necessary, adjust  
the screw on the gas valve to set the CO2 to 8.9% +/-  
0.2% (NG) or 9.7% +/- 0.2% (LPG);  
1. Press the menu button  
2. Press the button to access Menu 4.9;  
3. The value is adjustable between 0 and 10, 0 being the  
minimum output and 10 being the maximum, please refer  
to the chart on page 32 (Fig. 43) for the required setting;  
4. The maximum central heating output can now be  
3 times to access Menu 4;  
9. Press the setting button  
again to set the combustion  
rate control mode to maximum and if necessary adjust  
the screw on the gas valve to set the CO2 to 8.9% +/-  
0.2% (NG) or 9.2% +/- 0.2% (LPG);  
adjusted by pressing the setting button  
;
10. Reassemble in reverse order.  
5. To exit the setting mode, do not press any buttons for 1  
minute, the boiler will automatically exit the Setting Menu.  
14.6 Fitting the external sensor  
The external sensor should be fitted 1.5 meters above the  
floor on a North to North West facing wall.  
To connect the external sensor, it is first necessary to  
remove the casing panel as described in Section 18 (page  
41);  
Q
Fig. 39  
Remove the PCB cover as described in Section 18.4 and  
connect the external sensor as described in Section 18.5  
(page 50).  
33  
14.7 External sensor and ambient sensor set-up (where fitted)  
N.B.  
To ensure that these parameters are set correctly, consult the  
"thermo-regulation help" document enclosed with the  
documentation folder.  
14.8 Completion  
For the Republic of Ireland it is necessary to complete a  
“Declaration of Conformity” to indicate compliance to I.S.813. An  
example of this is given in the current edition of I.S.813. In  
addition it is necessary to complete the  
Commissioning Checklist in Section 24 of this manual (Page 60).  
14.9 Operational checks  
1. The system must be visually checked for soundness;  
1
2
2. Fill the condensate trap with water, by pouring /  
litre of water into the exhaust flue connector (see  
Fig. 39). N.B. In the event of a prolonged period of  
system shutdown, the condensate trap should be  
filled before any renewed use. A shortage of water  
in the trap could possibly lead to a temporary  
leakage of fumes into the air, until it refills itself;  
3. Ensure that the flue is fitted correctly;  
4. Allow the central heating system to warm up and adjust  
the central heating temperature control knob 31 (Fig.1),  
check the burner modulates between the high and low  
settings;  
Fig. 41  
5. Range rate the thermal power for central heating as  
detailed in Section 14.5. To adjust the maximum heating  
power it is necessary to follow the steps in Section 14.5  
Menu 4. and adjust in relation to the chart on Page 35  
(Fig. 42);  
6. Check the gas rate;  
7. Record the finding in the Benchmark Commissioning  
Checklist (Page 59);  
8. Run the domestic hot water and adjust to the correct  
water flow rate, adjust the domestic hot water  
temperature control knob 30 (Fig.1) to ensure the burner  
modulates between the high and low settings;  
9. Balance the central heating system until all return  
temperatures are correct and equal;  
10. Turn the boiler off by pressing the On/Off button 27  
(Fig.1) to OFF, disconnect the gas pressure gauge,  
retighten the screw and relight the boiler;  
11. Re-examine the central heating, domestic hot water and  
old water supplies for soundness;  
12. If external controls have been disconnected, reconnect  
and test;  
13. Refit the boiler casing.  
34  
14. Commissioning and testing (continued)  
14.10 Instructing the end user  
1. Hand over these instructions and explain how to use the  
time clock and room thermostat (if fitted) and explain how  
to register the guarantee;  
2. Show the end user how to switch the appliance off  
quickly, and indicate the position of the electric supply  
isolator;  
3. Inform the end user of the location of all drains, isolating  
valves and air vents;  
4. Explain how to turn the appliance off for both short and  
long periods and advise on the precautions necessary to  
prevent damage in the event that the appliance is  
inoperative when freezing conditions occur;  
5. Instruct the end user on the correct procedure for  
checking and refilling the boiler;  
6. Finally advise the end user that, for continued safe and  
efficient operation, the appliance must be serviced by a  
competent person at least once a year and the service  
logged in the Service Interval Record (Page 60).  
30 kW  
24 kW  
23 29  
21.2 26,8  
19.4 24,6  
17.6 22,4  
15.8 20,2  
14 18  
12.2 15,8  
10.4 13,6  
8.6 11,4  
6.8 9,2  
5
7
5
6
0
10  
1
2
3
4
7
8
9
Steps (Value P min - P max - Menu 4)  
Fig. 42  
35  
15. Fitting the casing  
Fitting the casing  
Remove the protective film on the casing:  
- Locate the lower clips into the slots in the chassis  
- Engage hooks N on the casing in notches R on the side panels M operation (Fig. 43)  
- Fit the top of the panel in place  
- Close the panel mounting clamps (Fig. 44)  
- Screw in the two clamp locking bolts A  
Note: it is essential to refit both locking bolts A  
A
M
1
R
Fig. 44  
Fig. 43  
N
36  
16. Sequence of operation  
Central Heating Mode  
Activation of the time clock and/or room thermostat starts the boiler. The display panel indicates the flow temperature s in central  
heating as illustrated below:  
Central heating  
mode ON  
Room thermostat  
contact ON  
With the boiler in rest, the diverter valve is in the domestic hot water position, activation of the central heating changes the  
position of the motorised valve head, moving the diverter valve into the central heating position.  
The start of the pump is delayed for 7 seconds to allow the movement of the diverter valve. The PCB checks the pressure of the  
primary circuit, if the pressure measured is 0.8 bar or lower, the boiler will lockout after 40 seconds. The error code E02 will  
appear on the LCD and the pump will stop.  
If the pressure measured is above 0.8 bar, the boiler ignition sequence will begin.  
At first, the fan starts and the speed increases to the required ignition speed (3460 rpm), once this speed has been achieved, the  
safety coil of the gas valve is supplied with 230V DC, after 8 seconds the boiler checks that the burner has lit, if the boiler does  
not sense that the burner has lit, the error code E04 will appear on the display, should this error occur, the boiler will attempt to  
relight two more times (20 seconds between each attempt). After this, should the boiler still not sense a flame, error code A03 will  
appear on the LCD. Should the boiler detect that the burner has lit, the boiler continues to regulate as follows.  
The NTC fitted on the outlet of the primary circuit exchanger is the only NTC to adjust the heat output of the boiler according to  
the adjustable setting point. This point is adjustable from 25°C to 85°C by the user. This NTC relays information to the PCB,  
which in turn modulates the burner by adjusting the speed of the fan.  
When the NTC senses that the set temperature has been achieved (+ 4°C to the temperature set by the user), the burner will go  
out. To avoid excessive burner lighting, an anti-cycle timer can be set between 0 to 7 minutes in menu 4 line 48 (see Section 17  
Adjustments and Settings).  
The speed of the pump can be set at two levels. The PCB controls the speed of the circulation pump depending on the speed set  
in menu 4 line 41. Setting 410 will cause the pump to operate continually at high speed, and setting 411 will cause the pump to  
modulate between high and low speed depending on the T between the inlet and the outlet. If the T is greater than 20°C the  
pump will run on high speed and if the T is less than 20°C the pump will run on low speed.  
NOTE: THE DEFAULT SETTING FOR THE PUMP IS HIGH SPEED.  
37  
17. Adjustments and settings  
The boiler is delivered with pre-set values described  
in menus 3 and 4.  
1
23  
3
3
22  
2
4
12  
5
I
9
All settings must only be changed by the installer or  
a qualified person. To gain access to the setting  
buttons please, open the front control panel cover  
P) and follow the instructions below.  
6
1
1 1  
1 4  
4
1 3  
P
On/Off push button  
Reset push button  
Menu button  
- button  
+ button Setting button  
3rd digit  
4th digit  
2nd digit  
1st digit  
DISPLAY  
Pressing the, comfort, reset, menu, +, -, or setting buttons will make the display light. The light will go out 30 seconds after the  
last button has been pressed.  
To gain access to the setting menus press  
and  
buttons together for 5 seconds.. Menu 1 is displayed on the 1st digit.  
Changing the menu :  
Press the Menu button  
menu  
. The menu number is displayed for 3 seconds. Press the menu button to change to the next  
Setting a parameter in a section :  
Press the  
or  
button to change from between sections.  
Note : When you arrive at the last section of a menu, pressing the  
button will change to the the 1st section. When  
button will change to the last section of the menu.  
you are at the first section, pressing the  
Changing section in a menu (available only for menu 3,4,5 and 6) :  
Press the setting button  
to enter the modification mode, The 3rd and 4th digits will be flashing, press the  
or  
button to select the correct value then press the setting button to select this modification and to exit the setting mode. The  
3rd and 4th digit stop flashing.  
Recalling the basic configuration :  
Select menu 3,4,5 or 6 then press the  
and  
buttons together for more than 5 seconds. The digits will flash CM for  
a while to indicate that the operation is completed.  
Clearing Menu 1 (default register) :  
Select menu 1 then press the  
and  
buttons together for more than 5 seconds. The digits will flash CM for a while  
to indicate that the operation is completed.  
Note : To exit install mode, press the Menu button  
returns to user mode.  
for at least 3s. If no button is pressed for about 1 minute, the display  
38  
ACTION  
CONFIGURATION  
DISPLAY  
Menu - 1 - Default register  
Record the last 10 defaults  
5 ”  
Section  
Digit 1  
Digit 2  
Digit 3 and 4  
Last default occured  
1
0
1
code from 01 to 99  
Last but one default occurred  
...  
1
1
code from 01 to 99  
...  
code from 01 to 99  
x times  
Last default occurred before the previous  
one  
1
9
code from 01 to 99  
Note -- is displayed if no default is recorded  
Menu - 2 - Boiler conditions  
Indicates the conditions or the configurations of the boiler  
once  
Section  
Digit 1  
Digit 2  
Digit 3 and 4  
Software version of display PCB  
2
0
code from 01 to 99  
Software version of main PCB  
Flue type  
2
2
2
1
2
3
code from 01 to 99  
4 : Condensation  
from 01 to 99  
x times  
Fan speed (in hundreds of rpm)  
0 : DHW  
1 : CH  
Theoretical position of the 3 way valve  
System plus only  
2
4
DHW flow temperature in °C  
CH flow temperature in °C  
CH return temperature in °C  
Outside temperature in °C  
2
2
2
2
5
7
8
9
from 01 to 99  
from 01 to 99  
from 01 to 99  
from 01 to 99  
39  
ACTION  
CONFIGURATION  
DISPLAY  
Menu - 3 - Boiler options  
once  
Rubrique  
Elément 1 Elément 2  
Elément 3 et 4  
--  
Inactive  
3
0
0 : non  
DHW thermostatic kit  
fitted to boiler?  
3
1
x times  
(fix DHW temp to 65°C)  
1 : oui  
0: on heating and  
reheating of tank  
Optional programmer action  
3
2
1: on reheating of tank  
2: on the heating  
Inactive  
Inactive  
3
3
3
3
3
4
5
7
--  
--  
DHW Delay (time before CH relight  
after a DHW cycle)  
0 to 5 mn by step  
0,5 mn  
Inactive  
--  
40  
ACTION  
CONFIGURATION  
DISPLAY  
Menu - 4 - Boiler settings  
once  
Section  
Digit 1  
Digit 2  
Digit 3 and 4  
0 : no  
Stop pump after burner stops  
4
0
1 : yes  
x times  
0 : High speed  
Pump speed  
4
1
1 : Adaptive  
0 to 5 min by step  
Pump post circulation duration  
Inactive  
4
4
4
2
3
4
0.5 min  
50° to 85°  
Maximum Central Heating flow  
temperature  
by steps of 1°  
25° to 50°  
Minimum Central Heating flow  
temperature  
4
5
by steps of 1°  
Inactive  
Inactive  
4
4
6
7
0 to 7 min by step  
CH anti-cycling delay  
4
4
8
9
0.5 min  
Value from 0 to 10  
Pmin & Pnominal  
CH maximum output (range rating)  
41  
ACTION  
CONFIGURATION  
DISPLAY  
Menu - 5 - Combustion rate control mode  
Effect  
Display  
once  
Combustion rate control mode OFF  
Combustion rate control mode ON  
The main exchanger temperature  
appears on the display.  
The digit - on the display shows the gas  
output level.  
(Top = maxi, bottom = mini).  
once  
Gaz output setting  
To modify the gas output use + and -  
buttons.  
x times  
To cancel the combustion rate control mode press button “Menu”.  
The combustion rate control mode will be inactive when :  
- boiler is in stand by mode  
- heating mode with room thermostat and initial heating temperature reaches max. heating recommendation  
- boiler in lockout mode  
- after the default settings have been restored or if the main supply fails (power cut)  
- if the operator exits the 5th menu  
- after 5 minutes if no buttons are pressed  
Note : As soon as the combustion rate control mode is active, the Central Heating and Domestic Hot Water  
control knobs become inactive.  
42  
ACTION  
CONFIGURATION  
DISPLAY  
Menu - 6 - Thermo-regulation settings  
once  
Section  
Digit 1  
Digit 2  
Digit 3 and 4  
0: Heating setting can be  
adjusted by the user  
1: Variable heating setting  
depending on the external  
temperature  
x times  
2: Variable heating setting  
depending on the room  
Type of control  
6
0
temperature (Clima Manager)*  
3: Variable heating setting  
depending on the external and  
room temperatures (Clima  
Manager)*  
If  
or  
Compensation  
6
6
6
1
2
3
00 to 20 in intervals of 1  
If  
or  
0.3  
0.5  
1.0  
1.2  
1.5  
2.0  
2.5  
3.0  
Slope  
If  
or  
Parallel shift  
from - 20 to 20 in intervals of 1  
Inactive  
Inactive  
Inactive  
Inactive  
Inactive  
Inactive  
6
6
6
6
6
6
4
5
6
7
8
9
--  
0
--  
--  
--  
--  
* Available only with Clima Manager  
N.B.  
To ensure that these parameters are set correctly, consult the "thermo-regulation help" document enclosed with the  
documentation folder.  
43  
17. Adjustements and Setting (continued)  
CH anti cycling delay setting :  
If you would like to change the setting of CH anti cycling delay, if you want 3 mn ,please proceed as follow :  
(note : the factory setting is 2 mn 30 seconds and the following explanation refer to menu 4 section 8)  
Display  
1
Switch to installer mode, press button  
and for 5 seconds, the  
5 ”  
1
2
display shows :10=0 if there is no  
default in the default register.  
Press 3 times on menu button  
gain access to menu 4, the display  
shows : 40=0 or 40=1  
to  
2
x 3  
or  
Change for section 8 (CH anti cycling  
delay), press on button side  
3
3
x 8  
times , the display shows :48=2.5  
(factory setting 2 mn 30 s)  
4 = menu 4  
8 = section 8  
2.5 = 2,5 mn (2 mn 30 secondes)  
4
Press on setting button  
one time,  
4
the 3rd and 4th digits flash together,  
Then press on  
to change the CH  
anti cycling delay, the display shows :  
48=3.0 press on setting button  
to confirm the value. The display  
stops flashing.  
Setting procedure is finished.  
To exit from setting mode, leave the  
boiler for approx. 1 minute then the  
computer will switch back to user  
mode.  
After programming please close the  
door P (fig. 48)  
44  
SERVICING INSTRUCTIONS  
A
To ensure efficient safe operation, it is recommended that the  
boiler is serviced annually by a competent person, refer to  
Section 20 (page 53) for the Servicing Schedule.  
Before starting any servicing work, ensure both the gas and  
electrical supplies to the boiler are isolated and the boiler is  
cool.  
Before and after servicing, a combustion analysis should be  
made via the flue sampling point.  
After servicing, preliminary electrical system checks must be  
carried out to ensure electrical safety (i.e. polarity, earth  
continuity, resistance to earth and short circuit).  
IMPORTANT!  
AFTER AN ANNUAL SERVICE, THE SERVICE INTERVAL RECORD (SECTION  
25, PAGE 60) MUST BE COMPLETED.  
Fig. 45  
18. Replacement of parts  
The life of individual components vary and they will need  
servicing or replacing as and when faults develop.  
The fault finding sequence chart in Section 19 will help to locate  
which component is the cause of any malfunction, and  
instructions for removal, inspection and replacement of the  
individual parts are given in the following pages.  
Fig. 46  
18.1 To Gain General Access  
All testing and maintenance operations on the boiler require the  
control panel to be lowered. This will also require the removal of  
the casing.  
18.1.1 Removing the front panel :  
1. Remove the security screw and unlock the two case  
locking catches A (see Figs. 45 & 46);  
2. Remove the front panel from the rest of the casing (see  
Fig. 47).  
18.1.2 Lowering the control panel :  
Fig. 47  
1. Remove the front panel;  
2. Unlock the two clamps locking and pivot the electrical  
box downward (see Fig. 48).  
Fig. 48  
45  
18.2 Access to the Combustion Chamber  
18.2.1 Removing the air gas assembly  
5. Remove the earth cable from the  
ignition electrode (Fig. 51), and  
remove the ignition electrode cable  
from the ignitor (Fig. 52)  
1. Isolate the gas supply to the boiler;  
2. Carry out step 18.1.1;  
4. Disconnect the detection electrode  
cable (Fig. 50);  
3. Remove the silencer (Fig. 49);  
Fig. 51  
Fig. 50  
Fig. 49  
6. Unplug the gas valve and fan connectors (Figs. 53 and 54);  
Fig. 52  
Fig. 54  
Fig. 53  
9. Remove the air gas assembly and  
combustion chamber front (Fig. 57);  
10. Reassemble in reverse order.  
7. Unscrew the 4 nuts D on the  
8. Unscrew the gas valve nut E  
combustion chamber (Fig. 55);  
(Fig. 56);  
E
D
Fig. 55  
Fig. 56  
Fig. 57  
46  
18.2.2 Removing the burner  
Do not remove the burner unless absoluly necessary.  
4. Reassemble in reverse order and  
checking all seals are undamaged  
and the burner is positioned  
correctly (Fig. 60).  
1. Carry out step 18.1.1 and 18.2.1  
(without removing the 4 nuts D);  
2. Remove the 3 screws F from the  
air/gas manifold (Fig. 58);  
3. Slide the burner out from the front,  
taking care not to damage the  
insulation (Fig. 59a 24 kW & 59b  
30 kW);  
If necessary, replace the insulation  
too.  
D
Fig. 59a  
F
Fig. 59b  
Fig. 58  
Fig. 60  
18.2.3 Removing the detection electrode  
1. Carry out step 18.1.1;  
2. Disconnect the detection electrode  
4. Pull the electrode from the  
combustion chamber (Fig. 63);  
3.Remove the 2 screws G from the  
cable (Fig. 61);  
5. Reassemble in reverse order.  
electrode manifold (Fig. 62);  
G
Fig. 61  
Fig. 62  
Fig. 63  
18.2.4 Removing the ignition electrode  
1. Carry out step 18.1.1;  
2. Remove the earth cable from the  
electrode (Fig. 64);  
3. Remove the electrode cable H from  
4. Unscrew the 2 screws I on the  
the ignitor (Fig. 65);  
electrode (Fig. 66);  
H
I
Fig. 64  
Fig. 65  
Fig. 66  
47  
18.2.5 Removing the fan  
1. Carry out step 18.1.1;  
2. Remove the air gas manifiold as in  
step 18.2.1 (Fig. 67);  
3. Unscrew the two screws from the  
venturi J and remove with the gas  
valve (Fig. 68);  
4. Unscrew the three screws K on the  
air/gas pipe and remove (Fig. 69);  
5. Reassemble in reverse order.  
K
J
Fig. 67  
Fig. 68  
Fig. 69  
18.2.6 Removing the gas valve  
1. Carry out step 18.1.1;  
2. Remove the air gas manifiold as in  
18.2.1 (Fig. 70);  
3. Unscrew the three screws L on the  
4. Unscrew the three screws holding  
the gas valve on the venturi (Fig.  
72);  
air/gas pipe and remove (Fig. 71);  
L
Fig. 70  
Fig. 71  
Fig. 72  
5. Remove the gas valve from the  
venturi. (Fig. 73);  
6. Reassemble in reverse order;  
7. The gas valve settings will need to  
be adjusted (see Section 14.3 page  
28);  
8. Reinstate the gas supply and test for  
tightness on reassembly.  
Fig. 73  
48  
18.2.7 Removing the heat exchanger  
1. Carry out step 18.1.1;  
2. Remove the air gas manifiold as in  
18.2.1 (Fig. 74);  
3. Remove the flow pipe clip and  
unscrew the pump nut (Fig. 75a &  
75b);  
4. Remove the flow and return pipes  
and the condense drain pipe from  
the heat exchanger. (Fig. 75c);  
Fig. 75a  
Fig. 75b  
Fig. 74  
Fig. 75c  
6. Remove the screw M2; then rotate  
7. Remove the heat exchanger by  
slightly rotating. (Fig. 78);  
8. Reassemble in reverse order.  
5. Remove the two bolts securing the  
clockwise the bearing frame (Fig. 77);  
exchanger (Fig. 76);  
M2  
M1  
Fig. 76  
Fig. 77  
Fig. 78  
18.2.8 Removing the spark generator  
3. Remove the screw N from the ignitor  
and remove (Fig. 80);  
4. Reassemble in reverse order.  
1. Carry out step 18.1.1;  
2. Disconnect the ignition electrode,  
live, neutral and earth cables from  
the ignitor (Fig. 79);  
N
Fig. 80  
Fig. 79  
49  
18.3 Access to the Water Circuit  
Important! Before any component is removed, the boiler must be drained of all water.  
18.3.1 Drain down  
Close the flow and return isolating valve and open the pressure relief valve.  
18.3.2 Removing the 3 way valve  
1. Carry out step 1.2.1 and 1.2.3;  
2. Remove the clip “Q1” from the by-pass tube (see fig. 87);  
3. Remove the clip “Q2” and “Q3” from the heating return and the pump (see fig. 88 & 89);  
4. Remove the two T25 screws “P1(see fig. 87);  
5. Remove the 3 way valve body pulling it toward you (see fig. 90);  
6. Reassemble in reverse order;  
P1  
Q2  
Q1  
Fig. 87  
Fig. 88  
Q3  
Fig. 90  
Fig. 86  
Fig. 89  
18.3.3 Removing the 3 way valve shutter  
1. Carry out step 1.2.1 and 1.2.3;  
2. Unscrew the two CHC screws  
R(see fig. 91);  
3. Remove the 3 way valve shutter  
pulling it up (see fig. 92)  
4. Reassemble in reverse order;  
R
fig. 91  
fig. 92  
50  
18.3.5 Removing the pump  
1. Carry out step 18.1.1;  
2. Lower the electrical box cover as in step 18.1.2;  
3. Remove the PCB cover;  
4. Unscrew the pump nut (see Fig. 94);  
4. Remove the pump plug from the control board and  
earth plug from earth socket (see Fig. 93);  
Fig. 93  
Fig. 94  
6. Pull the pump toward you and remove the clip S3  
securing the pressure gauge (see Fig. 96);  
7. Reassemble in reverse order.  
5. Remove the clip S2 on the pump volute (see Fig. 95);  
S2  
S3  
Fig. 96  
Fig. 95  
18.3.6 Removing the pressure relief valve  
1. Carry out step 18.1.1 and 18.3.1;  
2. Remove the clip securing the valve (see Fig. 97) and  
pull it toward you;  
3. Reassemble in reverse order; take care to ensure  
the valve is in the correct position;  
Fig. 97  
51  
18.3.7 Removing the expansion vessel  
1. Carry out step 18.3.1;  
2. Isolate the gas supply and disconnect all  
pipe connections;  
5. Pull the expansion vessel to remove it (see Fig. 99);  
6. Reassemble in reverse order.  
3. Remove the boiler from the wall  
4. Unscrew the nut U (see Fig. 98);  
U
Fig. 99  
Fig. 98  
18.3.9 Removing the temperature sensors (N.T.C’s)  
18.3.8 Removing the overheat thermostat  
1. Remove the casing as in step 18.1.1;  
2. Pull off the NTC connections. Then  
remove the NTC from the pipe by  
releasing it’s securing clip (see Fig. 101).  
1. Remove the casing as in step 18.1.1;  
2. Pull off the thermostat connections. Then  
remove the thermostat from the pipe by  
releasing it’s securing clip (see Fig. 100).  
Fig. 101  
Fig. 100  
52  
18.3.10 Removing the pressure gauge  
18.3.11 Removing the water pressure switch  
1. Carry out step 18.4.6;  
2. Remove the pressure gauge by releasing the two clips  
V and pulling the pressure gauge out. (see Fig. 102)  
1. Remove the casing as in step 18.1.1;  
2. Pull off the connections. Then remove the pressure  
switch by releasing it’s securing clip (see Fig. 103).  
V
Fig. 102  
Fig. 103  
2. Empty the condensate products and rinse the  
condensate trap with clean water (see Fig. 105)  
3. Reassemble in reverse order and fill the condensate  
trap with 1/2 litre of water before restarting the boiler.  
18.3.12 Removing & cleaning the condensate trap  
1. Unscrew the cap of the condensate trap (see Fig. 104)  
Fig. 105  
Fig. 104  
18.4 Access to the Control System  
18.4.1 Removing the P.C.B.s  
1. Carry out steps 18.1.1 and 18.1.2;  
2. Remove the screw W1 from the electrical box (see  
Fig. 106);  
3. Release the three clips W2 and remove the  
electrical box cover (see Fig. 107);  
W1  
W2  
Fig. 106  
Fig. 107  
53  
4. Remove the two screws W3 from the front control  
panel and lower the front control panel (see Fig.  
108);  
5. Remove all electrical connections from the display  
PCB (see Fig. 109;  
W3  
Fig. 108  
Fig. 109  
6. To remove the display PCB, remove the two  
screw W3 and lift the PCB out (see Fig. 110);  
7. Reassemble in reverse order;  
8. To remove the main PCB disconnect all electrical  
connections and remove the two screws W5 (see  
Fig. 111);  
Do not forget to swap the EEPROM button when  
removing the old PCB in order to replace it on the  
new one.  
9. Reassemble in reverse order.  
W4  
W5  
Fig. 110  
Fig. 111  
18.4.2 Removing the fuses  
18.5 Connecting the external sensor  
1. Reach to the main PCB as in step 18.4.1;  
2. Install the interface module supplied in the kit  
on the main PCB (see Fig. 113)  
3. Connect the wires between the external  
sensor and the interface (see Fig. 113).  
1. Carry out step 18.4.1;  
2. Remove the fuses “X(see Fig. 112)  
3. Reassemble in reverse order.  
NOTE: FUSE RATING = 2AMP FAST FUSE  
X
Fig. 112  
Fig. 113  
54  
19. Incorrect function  
In case of problem, or when the boiler has displayed an error code, the display flashes 2 digits. Please refer to the table below  
to diagnose the fault.  
For faults 01 and 03, A appears on the display, the boiler is locked and the reset button illuminates (28). To reset the boiler  
press the reset button 29.  
29  
Overheating lock out  
FAULT  
Fig. 114  
Code  
Fault description  
A 01  
Overheating lock out / Heat exchanger thermo fuse  
A 03  
No flame after safety timer  
A 18  
3 "flames in progress" disappearances in 1 operating cycle  
A 37  
CPU fault  
A 39  
MCU fault 1  
A 40  
MCU fault 2  
A 41  
Fan error  
E 02  
Pump protect (display after 40s.)  
E 04  
No flame detection  
E 05  
Anti freezing system, pump on  
E 06  
Anti freezing system, pump and burner on  
E 07  
No water circulation in primary circuit  
E 08  
No water in the primary circuit  
E 09  
DHW sensor open circuit  
E 10  
DHW sensor short circuit  
E 11  
Flow sensor open circuit  
E 12  
Flow sensor short circuit  
E 13  
Return sensor open circuit  
E 14  
Return sensor short circuit  
E 15  
Outdoor sensor open circuit (if fitted)  
E 16  
Outdoor sensor short circuit (if fitted)  
E 18  
Flame lift  
E 20  
Flame detect with gas valve off  
E 29  
Communication problem with offset unit  
E 30  
Communication problem with offset unit  
E 33  
Floor heating thermostat open circuit (if fitted) (ROOM THERMOSTAT FLOOR)  
E 37  
Communication problem with the main PCB  
E 38  
Reset button pressed 5 times in 15 minutes  
55  
20. Gas conversion  
If the boiler is not set for the gas type, converson kits are available. To convert the boiler, please use exclusively MTS parts and  
proceed as it is mentioned in the instruction manual provided with the conversion kit.  
21. Incorrect function  
Fault  
Cause  
Solution  
Control gas, water and electrical  
supply, fuses…  
No gas, no water or no  
electricity  
The boiler doesn’t start  
Air in the gas pipe  
Purge the air from the gas pipe  
Turn the room thermostat up  
Room thermostat switched off  
Wait for a few minutes  
Overheat lockout (A01)  
Press the reset button 29 (Fig. 114) the red led goes out  
Red indicator alight  
Noises in CH system  
No flame after safety time (A03) and the boiler attempts to re-light.  
No flame detected (E04)  
Flame lift (E18)  
If the red indicator lights too frequently, please call your  
local service centre.  
Air presence in CH system or. Purge the system of air (Section 14.2, page 28) and  
Insufficient pressure  
increase the system pressure (Section 2, page 6)  
Radiators rise in temperature  
During summer season  
Close the heating flow isolating valve (41 Fig. 2, page 5).  
Don’t forget to open it again before starting the heating.  
Gravity effect in the CH system  
Check the thermo fuse on the right top on the heat  
exchanger. With an open thermo fuse, a replacement of  
all the heat exchanger is required.  
If after A01 fault and with cold  
boiler, The boiler doesn’t start  
Overheat lockout (A01)  
If these solutions do not cure the fault, call a qualified professional  
56  
22. Maintenance Instructions  
22.1 General remarks  
22.2 Cleaning the primary exchanger  
It is recommended that the following inspections be carried  
out on the boiler at least once a year;  
Cleaning the exhaust side  
Remove the air gas assembly (Section 18.2.1). Check that  
the exhaust passages are free, if there are deposits present,  
clean the exchanger with compressed air or wash with water  
or a vinegar based detergent.  
1. Check the seals in the water group, and if necessary,  
replace the gasket and restore the seal to perfect working  
order;  
2. Check the seals in the gas group, and if necessary  
replace the gaskets and restore the seal to perfect  
working order;  
Cleaning the water side  
Use detergents that dissolve CaCO3. Leave to act for a  
short time and then rinse.  
3. Visually check the overall condition of the boiler;  
22.3 Operational test  
4. Visually check the combustion, and if necessary,  
disassemble and clean the burner;  
Make sure that the detergent does not remain inside the  
exchanger.  
5. Following inspection 3, disassemble and clean the  
combustion chamber as necessary;  
Unscrew the lower part of the condensate trap and clean it.  
Fill it with water and replace.  
6. Following inspection 4, disassemble and clean the  
injector, if necessary;  
After carrying out the maitenance operation, fill the heating  
circuit to a pressure of approximately 1.5 bar and release the  
air from the system. Also fill the domestic hot water system.  
7. Clean the primary heat exchanger. (see Section 22.2);  
2
8. Check and adjust the CO emissions as necessary (see  
Section 14.3);  
-
-
Place the boiler in operation.  
If necessary, release the air again from the heating  
system.  
Check the settings, seals and the correct functioning of  
the system for expelling the products of combustion and  
drawing combustion air.  
Check the settings and correct operation of all the  
control, regulation and monitoring components.  
Check that the burner ignites properly and carry out a  
visual check of the burner flame.  
9. Check the correct operation of the heating safety devices:  
- Overheat thermostat  
-
10. Check the correct operation of the flow switches;  
11. Check the correct operation of the low pressure switch;  
12. Check the diverter valve movement;  
-
-
-
-
Check that the 3 bar safety valve is operating correctly.  
Check the operation of the time control and room  
thermostat (if fitted).  
13. Check the correct operation of the gas group safety  
devices:  
- absence of gas or flame safety device (ionisation);  
NOTE: THESE CHECKS ARE NOT EXHAUSTIVE  
14. Check that the electrical connections are correct (as  
described in Section 13);  
15. Check the efficiency of the production of domestic hot  
water (test the flow rate and temperature rise);  
16. Carry out a general inspection of the boiler;  
17. Check the flue and termination point;  
18. Remove any oxide from the detection electrode by using  
an emery cloth.  
57  
23. Short spares list  
103  
101  
539  
543  
615  
624  
110  
112  
502  
506  
111  
616  
554  
537  
531  
532  
649  
401  
407  
538  
24 30  
Manf. date  
from to  
Key N  
Description  
Type  
Manf. Pt. N  
Other  
FF FF  
0100 BURNER ASSEMBLY  
0101 BURNER 24KW  
.
60000292  
.
..  
..  
..  
..  
BURNER 30KW  
60000293  
60000295  
61317432  
60000312  
61314753  
0103 SOUPAPE  
0110 IGNITION ELECTRODE  
0111 IONIZATION ELECTRODE  
0112 GASKET D:85-66.5-2.5  
0400 GAS SECTION  
0401 GAS VALVE  
GAS VALVE  
.
61307584  
61310129  
61314434  
NAT  
NAT  
.
..  
0407 FAN ASSY  
0500 HYDRAULIC BLOCK  
..  
..  
..  
..  
..  
..  
..  
..  
..  
..  
0502 MOTOR - THREE-WAY VALVE  
0506 VALVE KIT  
61302483  
61311597  
61304608  
61304618  
61312668  
61301964  
61303461  
61010572  
61311745  
61310364  
0531 AIR SEPARATOR HEAD ASSEMBLY  
0532 GASKET KIT  
0537 PRESSURE RELIEF VALVE  
0538 PUMP + AIR SEPARATOR 15/50  
PUMP + AIR SEPARATOR 15/60  
0539 OVERHEAT THERMOSTAT 100°C  
0543 STOPPED WATER THROTTLE  
0554 PRESSURE SENSOR 0.8b  
277783  
0600 ELECTRICAL BOX  
..  
..  
..  
..  
0615 PRINTED CIRCUIT BOARD  
0616 PRINTED CIRCUIT BOARD  
0624 PRINTED CIRCUIT BOARD  
0649 PRESSURE GAUGE  
60000284  
60000176  
61314958  
61313561  
58  
24. Technical data  
24 kW  
1312-BP-4083  
****  
30 kW  
1312-BP-4084  
****  
Model  
CE certificate  
Performance category  
NoX class  
5
5
Category  
II2H3P  
5 to 21  
6 to 23  
25,1  
II2H3P  
6 to 27  
7 to 29  
30,2  
Heating output  
Heating output  
80°C/60°C  
50°C/30°C  
kW  
kW  
Variable cylinder heating power  
PN max  
kW  
Nominal gas flow rate (15°C-1013 mbar)  
min  
max  
min  
max  
Central Heating and cylinder heating (gas flow rate) Qn  
kW  
m3/h  
kg/h  
5,5  
22  
25  
6,5  
28  
30  
G20 (NG H - Lacq) 34,02 MJ/m3 under 20 mbar  
G31 (propane) 46,4 MJ/kg under 37 mbar  
Vr  
Vr  
0,58  
0,43  
2,33  
1,71  
2,65  
1,94  
0,69  
0,50  
2,96  
2,17  
3,17  
2,33  
Membrane Diameter (mm)/marking  
G20  
mm  
mm  
without  
without  
G31 propane  
4,4  
4,6  
Adjustable heating outlet temperature  
Central heating minimum flow rate  
°C  
l/h  
25 to 85  
25 to 85  
300  
3
300  
3
Central heating circuit maximum pressure Pw max  
Central heating expansion vessel capacity  
bar  
L
6
8
Expansion vessel inflation pressure  
Electric voltage  
bar  
0,7  
0,7  
230 volt, single phase-50 Hz 230 volt, single phase-50 Hz  
Electrical input power  
Electrical protection  
W
150  
150  
IP 44  
IP 44  
Mass flow rate for combustion products  
Fume temperature (60-80)  
Fume temperature (30-50)  
CO2 G20  
11,5  
13,5  
°C  
°C  
%
67  
67  
60  
60  
9
9
CO2 G31  
%
10  
10  
Flue duct type  
C13 C33 C43 C53 B23  
C13 C33 C43 C53 B23  
59  
60  
25. Benchmark Commissioning Checklist  
BENCHMARK No.  
GAS BOILER COMMISSIONING CHECKLIST  
BOILER SERIAL No.  
NOTIFICATION No.  
CONTROLS To comply with the Building Regulation, each section must have a tick in one or other of the boxes  
TIME & TEMPERATURE CONTROL TO HEATING  
ROOM T/STAT & PROGRAMMER/TIMER  
PROGRAMMABLE ROOMSTAT  
COMBI BOILER  
TIME & TEMPERATURE CONTROL TO HOT WATER CYLINDER T/STAT & PROGRAMMER/TIMER  
FITTED  
FITTED  
FITTED  
FITTED  
HEATING ZONE VALVES  
NOT REQUIRED  
HOT WATER ZONE VALVES  
NOT REQUIRED  
THERMOSTATIC RADIATOR VALVES  
AUTOMATIC BYPASS TO SYSTEM  
NOT REQUIRED  
FOR ALL BOILERS CONFIRM THE FOLLOWING  
THE SYSTEM HAS BEEN FLUSHED IN ACCORDANCE WITH THE BOILER MANUFACTURER’S INSTRUCTIONS?  
THE SYSTEM CLEANER USED  
THE INHIBITOR USED  
FOR THE CENTRAL HEATING MODE, MEASURE & RECORD  
GAS RATE  
m3/hr  
N/A  
ft3/hr  
mbar  
°C  
BURNER OPERATING PRESSURE ( IF APPLICABLE)  
CENTRAL HEATING FLOW TEMPERATURE  
CENTRAL HEATING RETURN TEMPERATURE  
°C  
FOR COMBINATION BOILERS ONLY  
HAS A WATER SCALE REDUCER BEEN FITTED?  
YES  
NO  
WHAT TYPE OF SCALE REDUCER HAS BEEN FITTED  
FOR THE DOMESTIC HOT WATER MODE, MEASURE & RECORD  
GAS RATE  
m3/hr  
N/A  
ft3/hr  
mbar  
°C  
MAXIMUM BURNER OPERATING PRESSURE (IF APPLICABLE)  
COLD WATER INLET TEMPERATURE  
HOT WATER OUTLET TEMPERATURE  
WATER FLOW RATE  
°C  
Its/min  
FOR CONDENSING BOILERS ONLY CONFIRM THE FOLLOWING  
THE CONDENSATE DRAIN HAS BEEN INSTALLED IN ACCORDANCE WITH  
THE MANUFACTURER’S INSTRUCTIONS?  
YES  
FOR ALL INSTALLATIONS CONFIRM THE FOLLOWING  
THE HEATING AND HOT WATER SYSTEM COMPLIES  
WITH CURRENT BUILDING REGULATIONS  
THE APPLIANCE AND ASSOCIATED EQUIPMENT HAS BEEN INSTALLED AND COMMISSIONED  
IN ACCORDANCE WITH THE MANUFACTURER’S INSTRUCTIONS  
IF REQUIRED BY THE MANUFACTURER, HAVE YOU RECORDED A CO/CO2 RATIO READING? N/A  
THE OPERATION OF THE APPLIANCE AND SYSTEM  
YES  
CO/CO2 RATIO  
CONTROLS HAVE BEEN DEMONSTRATED TO THE CUSTOMER  
THE MANUFACTURER’S LITERATURE HAS BEEN LEFT WITH THE CUSTOMER  
COMMISSIONING ENG’S NAME  
PRINT  
SIGN  
CORGI ID N .  
°
DATE  
26. Service Interval Record  
SERVICE INTERVAL RECORD  
It is recommended that your heating system is serviced regularly  
and that you complete the appropriate Service Interval Record Below.  
Service Provider. Before completing the appropriate Service Interval Record below, please ensure you have carried out the service  
as described in the boiler manufacturer’s instructions. Always use the manufacturer’s specified spare part when replacing all controls  
SERVICE 1 DATE  
ENGINEER NAME  
COMPANY NAME  
TEL No.  
SERVICE 2 DATE  
ENGINEER NAME  
COMPANY NAME  
TEL No.  
CORGI ID CARD SERIAL No.  
COMMENTS  
CORGI ID CARD SERIAL No.  
COMMENTS  
SIGNATURE  
SIGNATURE  
SERVICE 3 DATE  
ENGINEER NAME  
COMPANY NAME  
TEL No.  
SERVICE 4 DATE  
ENGINEER NAME  
COMPANY NAME  
TEL No.  
CORGI ID CARD SERIAL No.  
COMMENTS  
CORGI ID CARD SERIAL No.  
COMMENTS  
SIGNATURE  
SIGNATURE  
SERVICE 5 DATE  
ENGINEER NAME  
COMPANY NAME  
TEL No.  
SERVICE 6 DATE  
ENGINEER NAME  
COMPANY NAME  
TEL No.  
CORGI ID CARD SERIAL No.  
COMMENTS  
CORGI ID CARD SERIAL No.  
COMMENTS  
SIGNATURE  
SIGNATURE  
SERVICE 7 DATE  
ENGINEER NAME  
COMPANY NAME  
TEL No.  
SERVICE 8 DATE  
ENGINEER NAME  
COMPANY NAME  
TEL No.  
CORGI ID CARD SERIAL No.  
COMMENTS  
CORGI ID CARD SERIAL No.  
COMMENTS  
SIGNATURE  
SIGNATURE  
SERVICE 9 DATE  
ENGINEER NAME  
COMPANY NAME  
TEL No.  
SERVICE 10 DATE  
ENGINEER NAME  
COMPANY NAME  
TEL No.  
CORGI ID CARD SERIAL No.  
COMMENTS  
CORGI ID CARD SERIAL No.  
COMMENTS  
SIGNATURE  
SIGNATURE  
TERMS AND CONDITIONS OF GUARANTEE  
Please read these terms and conditions which are in manufacturer’s guarantee has been withdrawn.  
addition to any terms and conditions detailed in this book On the 12 month anniversary of the appliance  
or any registration card supplied with your appliance.  
installation, you must have it serviced to continue any  
guarantee offered into the following year. Failure to do  
so will invalidate your guarantee and should an MTS  
engineer be required to attend and no proof of service  
documentation is made available, then MTS will charge.  
A charge will be made to the owner of the appliance if:  
The reason for any service visit is as a direct result  
of a failure to install the appliance in accordance  
with the manufacturer’s instructions.  
As part of the commissioning process, it is a legal  
requirement to register all boiler installations or  
replacements with CORGI. Upon registration a  
“Certification Number” will be issued followed by a  
“Declaration of Safety” Certificate. MTS (GB) Ltd cannot  
be called upon to carry out any work under the  
manufacturer’s guarantee without proof of registration.  
The registration number must be quoted when  
requesting a service visit, and the “Declaration of Safety”  
Certficate subsequently shown to the service engineer.  
If the certificate is not made available, the engineer will  
not work on the appliance and a wasted call charge will  
be made.  
Your installer does not complete the necessary  
commissioning process and procedure as detailed in  
the Installation and Operating Instructions.  
Your appliance is not serviced on or before the 12  
month anniversary of installation - this only applies to  
appliances with a 2 and 5 year guarantee.  
Our service engineer calls as requested and the  
failure is a non-manufacturing defect.  
Failure to pay an invoice for any such occurence will be  
assumed by MTS that you accept that your appliance  
has not been installed correctly and understand that any  
If you have a problem with commissioning on installation, please contact our  
Technical Department on 0870 241 8180  
63  
Chaffoteaux & Maury are continuously improving their products and therefore reserve the right to change specifications without  
prior notice and accepts no liability for any errors or omission in the information contained in this document.  
Manufacturer:  
MTS (SA) - France  
Commercial subsidiary: MTS (GB) Lim ited  
MTS Building  
Hughenden Avenue  
High Wycombe  
Bucks HP13 5FT  
Telephone: (01494) 755600  
Fax: (01494) 459775  
E-mail: info@mtsgroup.com  
Technical Sup p ort Help Line: 0870 241 8180  
Custom er Service Help Desk: 0870 600 9888  
64  

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