LG Electronics Air Conditioner 3828A20025U User Manual

P/No.: 3828A20025U  
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Floor Standing Type Air Conditioner Installation Manual  
TABLE OF CONTENTS  
OUT-LINE OF INSTALLATION  
..........................................................................................  
Safety Precautions  
3
6
..............................................................  
Installation of Indoor, Outdoor Unit  
1) Selection of the best location.................................................................................................................................6  
2) Indoor Unit Installation ...........................................................................................................................................8  
3) Outdoor unit installation .........................................................................................................................................8  
4) Refrigerant amount ................................................................................................................................................8  
5) Installation guide at the seaside ............................................................................................................................9  
6) Installation method procedure..............................................................................................................................10  
7) Preparation of installation parts and tools ...........................................................................................................11  
8) Preparation of piping............................................................................................................................................12  
9) Connection of piping ............................................................................................................................................13  
10) Precautions in bending ......................................................................................................................................13  
11) Connecting the cable to the indoor unit.............................................................................................................14  
12) Connecting the piping to the outdoor unit..........................................................................................................15  
13) Connecting the cable to the outdoor unit...........................................................................................................15  
14) Power supply and wiring....................................................................................................................................16  
15) Vacuum drying of the connecting pipes and the indoor unit..............................................................................17  
16) Form the pipe.....................................................................................................................................................18  
Final Check and Test Run..........................................................................................19  
2
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Safety Precautions  
Safety Precautions  
To prevent injury to the user or other people and property damage, the following instructions  
must be followed.  
I
Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness  
is classified by the following indications.  
This symbol indicates the possibility of death or serious injury.  
WARNING  
This symbol indicates the possibility of injury or damage.  
CAUTION  
I Meanings of symbols used in this manual are as shown below.  
Be sure not to do.  
Be sure to follow the instruction.  
WARNING  
I Installation  
Do not use a defective or  
underrated circuit breaker. Use  
this appliance on a dedicated  
circuit.  
For electrical work, contact the  
dealer, seller, a qualified  
electrician, or an Authorized  
Service Center.  
Always ground the product.  
• There is risk of fire or  
electric shock.  
Do not disassemble or repair  
the product. There is risk of  
fire or electric shock.  
• There is risk of fire or  
electric shock.  
Install the panel and the cover of  
control box securely.  
Always install a dedicated  
circuit and breaker.  
Use the correctly rated breaker  
or fuse.  
• There is risk of fire or  
electric shock.  
• Improper wiring or  
installation may cause fire or  
electric shock  
• There is risk of fire or  
electric shock.  
Installation Manual  
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3
Safety Precautions  
Do not modify or extend the power cable.  
Be cautious when unpacking and installing the  
product.  
• There is risk of fire or electric shock.  
Sharp edges could cause injury. Be especially  
careful of the case edges and the fins on the  
condenser and evaporator.  
For installation, always contact the dealer or an  
Authorized Service Center.  
Do not install the product on a defective  
installation stand.  
• There is risk of fire, electric shock, explosion,  
or injury.  
• It may cause injury, accident, or damage to  
the product.  
Be sure the installation area does not  
deteriorate with age.  
Do not let the air conditioner run for a long time when  
the humidity is very high and a door or a window is  
left open.  
If the base collapses, the air conditioner could fall with  
it, causing property damage, product failure, and  
personal injury.  
• Moisture may condense and wet or damage  
furniture.  
I Operation  
Do not store or use flammable gas or combustibles  
near the product.  
• There is risk of fire or failure of product.  
Gasolin  
4
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Safety Precautions  
CAUTION  
I Installation  
Always check for gas (refrigerant) leakage after  
installation or repair of product.  
Install the drain hose to ensure that water is  
drained away properly.  
• Low refrigerant levels may cause failure of  
product.  
• A bad connection may cause water leakage.  
Keep level even when installing the product.  
Do not install the product where the noise or hot air  
from the outdoor unit could damage the  
neighborhoods.  
To avoid vibration or water leakage.  
• It may cause a problem for your neighbors.  
90˚  
Use two or more people to lift and transport the  
product.  
Do not install the product where it will be  
exposed to sea wind (salt spray) directly.  
• Avoid personal injury.  
• It may cause corrosion on the product.  
Corrosion, particularly on the condenser and  
evaporator fins, could cause product  
malfunction or inefficient operation.  
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5
Installation of Unit  
Installation of Unit  
Selection of the best location  
1. Indoor unit  
There should not be any heat source or  
steam near the unit.  
There should not be any obstacles to  
prevent the air circulation.  
A place where air circulation in the room  
will be good.  
A place where drainage can be easily  
obtained.  
5cm  
40cm  
40cm  
100cm  
A place where noise prevention is taken  
into consideration.  
Do not install the unit near the door way.  
Ensure the spaces indicated by arrows  
from the wall, ceiling, or other obstacles.  
The indoor unit must keep the  
maintenance space.  
2. Outdoor unit  
If an awning is built over the unit to prevent  
direct sunlight or rain exposure, be careful  
that heat radiation from the condenser is  
not restricted.  
There should not be any animals or plants  
which could be affected by hot air  
discharged.  
Sunr  
oof  
More than  
50cm  
More than  
350cm  
Ensure the spaces indicated by arrows  
from the wall, ceiling, fence or other  
obstacles.  
More  
than 50cm  
Fence or  
obstacles  
More than 100cm  
6
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Installation of Unit  
3. Piping length and the elevation  
Max.  
Length  
A (m)  
Max.  
Elevation  
B (m)  
PIPE SIZE  
MODEL  
(BTU/h)  
GAS SIDE  
LIQUID SIDE  
20k  
28k/30k/40k  
44k/50k  
80k  
5/8"  
5/8"  
3/4"  
1"  
1/4"  
3/8"  
3/8"  
5/8"  
25  
30  
40  
50  
15  
20  
25  
30  
Indoor unit  
A
Outdoor unit  
B
CAUTION:  
Capacity is based on standard length and maximum allowance length is on  
the basis of reliability.  
Oil trap should be installed every 5~7 meters.  
Installation Manual  
7
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Installation of Unit  
The Indoor Unit Installation  
Wall  
Core Drill  
200mm  
70mm  
70mm  
1. The mounting floor should be strong and solid  
enough to prevent it from vibration.  
INSIDE  
OUTSIDE  
Wall  
2. Drill the piping hole with 70mm diameter hole-  
core drill at either the right or the left of indoor  
unit. The hole should be sightly slant to the  
outdoor side.  
Plastic tube  
(Bushing)  
Tilt  
3. Insert the plastic tube through the hole.  
4. Cut the extruded outside part of the plastic  
tube, if necessary.  
Cut if necessary  
More than 15mm  
Outdoor unit Installation  
1. Install the outdoor unit on the concrete or any solid base securely and horizontally by securing it  
with bolts (Ø12mm) and nuts.  
2. If there is any vibration transmitted to the building, mount the rubber underneath the outdoor unit.  
Refrigerant amount  
Before shipment, this air conditioner is filled  
REFRIGERANT CHARGE  
30g/m (1.06oz/m)  
MODEL  
with the rated amount of refrigerant including  
additional amount required for air-purging,  
subject to 7.5m piping length. (The rated  
amount of refrigerant is indicated on the name  
plate.) But when the piping length exceeds 7.5  
meters, additional charge is required according  
to the following table.  
20k/28k/30k/40k  
(BTU/h)  
44k/50k  
(BTU/h)  
40g/m (1.41oz/m)  
80g/m (2.82oz/m)  
80k  
(BTU/h)  
Example) 28K/30K  
In case of 10m long pipe(one-way), the amount  
of refrigerant to be replenished is:  
(10-7.5) x 30 = 75g  
(10-7.5) x 1.06 = 2.65oz  
8
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Installation of Unit  
Installation guide at the seaside  
CAUTION  
1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.  
2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion  
on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunc-  
tion or inefficient performance.  
3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind. Otherwise it  
needs additional anticorrosion treatment on the heat exchanger.  
Selecting the location(Outdoor Unit)  
1. If the outdoor unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided.  
Install the outdoor unit on the opposite side of the sea wind direction.  
Sea wind  
Sea wind  
2. In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to the sea wind.  
It should be strong enough like concrete to prevent  
the sea wind from the sea.  
Windbreak  
The height and width should be more than 150% of  
the outdoor unit.  
Sea wind  
It should be keep more than 70 cm of space  
between outdoor unit and the windbreak for easy  
air flow.  
3. Select a well-drained place.  
1. If you cant meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment.  
2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water  
Installation Manual  
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9
Installation of Unit  
Installation Method  
No.  
1
Installation works  
Preparation of tools and installation parts  
Flaring the pipes  
Descriptions  
Preparation of installation  
2
To insert the flare nuts, mounted on the  
connection parts of both indoor and  
outdoor unit, onto the copper pipes.  
3
4
Pipe bending  
To reduce the flow resistance of refrigerant.  
Connection of long piping  
Connection of installation parts  
(elbows, socket etc)  
5
6
7
8
Tighten the flare nut (outdoor)  
Blowing the pipings  
Connecting the pipings of the outdoor unit.  
To remove dust and scale in working.  
Connecting the pipings of the indoor unit.  
Tighten the flare nut (indoor)  
Check a gas-leakage of the connecting  
part of the pipings.  
9
Vacuum drying of the piping and indoor unit  
The air which contains moisture and which  
remains in the refrigeration cycle may cause a  
malfunction on the compressor  
10  
Open the 3-way (liquid side) and  
3-way (gas side) valves.  
11  
12  
13  
Form the pipings  
To prevent heat loss and sweat  
Checking the drainage (indoor unit)  
To ensure if water flow drain hose of indoor unit.  
Preparation of the operating  
Connecting the cable between outdoor  
and indoor unit  
14  
15  
Connecting the main cable to outdoor unit  
Supply the power to the crankcase heater  
(Before the operating the unit)  
To prevent the liquid back to the compressor.  
(Heat pump only)  
16  
Cooling operation  
(Use the remote control or display of the  
indoor unit)  
10 Floor Standing type Air Conditioner  
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Installation of Unit  
Preparation of installation parts and tools  
No.  
1
Installation Parts, Tools  
Flaring tool (Ø 6.35 - Ø 19.05)  
Remear  
Use  
Flaring the pipes  
2
Remove burrs from cut edges of pipes.  
Cutting the pipings  
3
Pipe cutter (MAX 35mm Copper pipe)  
Wrench (H5, H4 hexagonal wrench)  
Pipe bender  
4
To open the service valve  
Bending the pipings  
5
6
Leak detector  
Check a gas-leakage of connecting part  
of the pipings  
7
8
Manifold gauge  
To measure the pressure, to charge the refrigerant  
To connect the bombe  
Charge-nipple  
9
Vacuum pump  
To remove the air in the pipe.  
10  
11  
Charge cylinder balance  
Bombe (Freon-22)  
To measure the refrigerant amount  
Gas charge  
Cleaning the pipe  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
Spanner  
To tighten the connecting parts of the pipings  
Monkey spanner  
Driver(  
,
)
Benchi (150mm)  
Tapeline  
Cutting the wires  
To measure the length  
Core drill  
To make holes through the concrete wall and blocks  
To measure the current and voltage  
To measure the insulation resistance  
To measure the intake and outlet air temperature of the indoor unit  
To use the connecting pipings  
To cover the connecting pipings  
To finish the connecting pipings  
To shut off the main power  
Voltmeter, Amperemeter, Clampmeter  
Insulation resistance tester  
Glass thermometer  
Copper tubes  
Insulation material  
Tape  
Electrical Leakage Breaker  
Cable  
To connect the cable from outdoor unit to indoor unit  
To remote the condensing water  
Drain hose sockets, elbows  
Installation Manual 11  
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Installation of Unit  
Preparation of Piping  
Main cause of gas leakage is defect in flaring  
work. Carry out correct flaring work in the  
following procedure.  
Copper  
tube  
Slanted Uneven Rough  
90°  
1. Cut the pipes and the cable.  
Use the accessory piping kit or the pipes  
purchased locally.  
Measure the distance between the indoor  
and the outdoor unit.  
Cut the pipes a little longer than measured  
distance.  
Pipe  
Reamer  
Cut the cable 1.5m longer than the pipe  
length.  
Point down  
2. Burrs removal  
Completely remove all burrs from the cut  
cross section of pipe/tube.  
Flare nut  
Put the end of the copper tube/pipe to  
downward direction as you remove burrs in  
order to avoid to let burrs drop in the tubing.  
Copper tube  
3. Putting nut on  
Remove flare nuts attached to indoor and  
outdoor units, than put them on pipe/tube  
having completed burr removal.  
(Not possible to put them on after flaring work)  
Handle  
Bar  
Bar  
4. Flaring work  
"A"  
Yoke  
Cone  
Carry out flaring work using dedicated  
flaring tool as shown below.  
Outside diameter  
A
Copper pipe  
mm  
inch  
1/4  
3/8  
1/2  
5/8  
3/4  
mm  
Clamp handle  
Ø6.35  
Ø9.52  
1.1~1.3  
1.5~1.7  
1.6~1.8  
1.6~1.8  
1.9~2.1  
Red arrow mark  
Ø12.7  
Ø15.88  
Ø19.05  
Smooth all round  
Inside is shining without scratches  
Firmly hold copper tube in a bar(or die) as  
indicated dimension in the table above.  
= Improper flaring =  
5. Check  
Inclined Surface Cracked Uneven  
Compare the flared work with figure below.  
damaged  
thickness  
Even length  
all round  
If flare is noted to be defective, cut off the  
flared section and do flaring work again.  
12 Floor Standing type Air Conditioner  
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Installation of Unit  
Connection of piping  
1. Move the indoor tubing and drain hose to the hole  
Remove tubing holder and pull the tubing out of the chassis.  
2. Replace the tubing holder into original position  
3. Route the tubing and the drain hose staight backwards.  
4. Insert the connecting cable into the indoor unit through the hole.  
Do not connect the cable to the indoor unit  
Make a small loop with the cable for easy connection later.  
5. Tape the tubing and the connecting cable.  
6. Indoor unit installation.  
7. Connecting the pipings to the indoor unit.  
Align the center of the pipings and suffciently  
tighten the flare nut with fingers.  
Finally, tighten the flare nut with troque  
wrench until the wrench clicks.  
When tightening the flare nut with troque  
wrench, ensure the direction for tightening  
follows the arrow on the wrench.  
Indoor unit tubing  
Flare nut Pipings  
Torque wrench  
PIPE SIZE  
1/4"  
TORQUE  
.
1.8~2.5 kgf m  
.
3/8"  
3.4~4.2 kgf m  
Spanner  
.
1/2"  
5.5~6.6 kgf m  
.
5/8"  
6.3~8.2 kgf m  
.
3/4"  
9.9~12.1 kgf m  
Precautions in bending  
1. If it is necessary to bend or stretch the  
tubing, use the spring which is attached to  
the tubing in stead of pipe bender.  
Please make a careful notice to make a  
smooth line.  
Hold the tubing with your two hands closely  
and then bend or stretch it slowly not to  
make any crack.  
Spring  
R70mm  
Remember that the radius (R) should not  
exceed 70mm (Refer to Fig. 1)  
(Fig. 1)  
2. Do not repeat the bending process to prevent  
the tubing from cracking or crushing.  
R
3. Keep in mind that the bending part should  
not be cracked and make the radius (R) as  
long as possible (Refer to Fig. 2)  
(Fig. 2)  
Installation Manual 13  
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Installation of Unit  
Connecting the Cable to Indoor Unit  
The inside and outside connecting cable can be connected after opening the side inlet grille.  
1. Open the side-inlet grille manually (Fig. 1)  
2. Open the panel (A) with driver ( ) (Fig. 2)  
3. Connect the connecting pipe (Fig. 3)  
4. Connect the cables (LG doesn't supply) to the terminal block in the front panel. (Fig. 3)  
5. Secure the panel (A) to the original position with the screw ( ).  
6. Insert the plastic tube (bushing) in small hole in order to prevent the connecting wires from  
being cut by sharp edge of the hole.(Fig. 4), America, Canada only.  
7. Close the side-inlet grille.  
Fig. 1  
Fig. 2  
"A"  
Fig. 3  
Wiring Details(B)  
1 Cooling Model (America, Canada Only)  
1 2 3 4 5  
3(L1) 4(L2) 5 6 7  
To Outdoor Unit  
To Outdoor Unit  
2 Heat Pump Model  
"B"  
1 2 3 4 5  
To Outdoor Unit  
3 Heat Pump + Heater Model  
1 2 3 4 5  
1 2  
To Outdoor Unit  
Fig. 4  
Plastic tube  
(Bushing)  
14 Floor Standing type Air Conditioner  
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Installation of Unit  
Connecting pipings to the outdoor unit .  
1. Align the center of the pipings and  
sufficiently tighten the flare nut with fingers.  
2. Finally tighten the flare nut with torque  
wrench until the wrench clicks.  
When tightening the flare nut with torque  
wrench, ensure the direction for tightening  
follows the arrow on the wrench.  
Gas side piping  
Outdoor unit  
PIPE SIZE  
1/4"  
TORQUE  
Liquid side piping  
Torque wrench  
1.8~2.5 kgf·m  
3.4~4.2 kgf·m  
5.5~6.6 kgf·m  
6.3~8.2 kgf·m  
9.9~12.1 kgf·m  
3/8"  
1/2"  
5/8"  
3/4"  
Connecting the cables to the outdoor unit  
1. Open the control board cover from the  
outdoor unit by removing the screws.  
2. Connect wires to the terminals on the control  
board individually and secure the cables  
onto the control board with clamp.  
3. Secure the control board cover to the  
original position with the screws.  
CAUTION: Perform grounding  
This product should be grounded.  
Defective grounding could cause an  
electric shock.  
Terminal block  
Terminals on the indoor unit  
3(L1) 4(L2)  
5
5
6
7
Over 5mm  
(2")  
Conduit panel  
Connecting  
cable  
4(L2)  
3(L1)  
Terminals on the outdoor unit 1(L1) 2(L2)  
Power supply  
cord  
Cover control  
POWER INPUT  
(America, Canada Only)  
(America, Canada Only)  
Installation Manual 15  
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Installation of Unit  
Power Supply and Wiring  
The unit is completely wired internally at the  
factory according to general rule of electrical  
technology, but local rules, if they are required,  
should be complied with.  
Voltage  
Power source voltage  
working voltage  
1. Power supply  
Power source must fulfill the following  
conditions:  
Starting voltage  
Starting point  
Time  
The working voltage should be higher than  
90% and lower than 110% of the rated  
voltage marked on the name plate.  
The starting voltage should be higher than  
85% of the rated voltage marked on the  
name plate.  
2. Wiring  
After the confirmation of the above conditions, prepare the wiring as follows:  
Use the power supply cord(Rubber  
insulation, type Ho7RNF approved by HAR  
or SAA) suitable for the product's  
electriccal capacity.  
The screws which fasten the wiring in the  
casing of electrical fittings are liable to  
come loose from vibrations to which the  
unit is subjected during the course of  
transportation. Check them and make sure  
that they are all tightly fastened.  
UNIT  
(BTU/h)  
Conductor  
cross-sectional area  
VOLTS  
(If they are loose, it could give rise to burn-  
out of the wires.)  
H/P  
C/O  
H/P  
C/O  
H/P  
C/O  
450/750V  
450/750V  
450/750V  
450/750V  
450/750V  
450/750V  
4.0mm2  
4.0mm2  
5.5mm2  
5.5mm2  
8.0mm2  
8.0mm2  
20k/28k/  
30k/40k  
See to it that the starting voltage is  
maintained at more than 90 percent of the  
rated voltage marked on the name plate.  
44k/48k/  
50k  
80k  
The following troubles would be caused by  
voltage drop-down.  
Vibration of a magnetic switch, damage on  
the contact point there of, fuse breaking,  
disturbance to the normal function of a  
overload protection device.  
Provide a recognized circuit breaker as  
below between power source and unit.  
A disconnection device to adequately  
disconnect all supply lines must be fitted.  
(for service operations)  
*Separate main and heater power supply for  
Z model. (Do not connect together to the  
same power supply)  
UNIT (BTU/h)  
Circuit breaker capacity  
H/P  
C/O  
H/P  
C/O  
H/P  
C/O  
H/P  
C/O  
30A  
30A  
40A  
40A  
30A  
30A  
50A  
50A  
20k/28k/  
30k/40k  
Unit (BTU/h)  
Breaker  
30A  
Conductor  
3.5mm2  
20k/28k  
30k/40k  
44k/48k  
50k/60k  
80k  
1 Phase  
Heater  
Wiring  
Spec.  
44k/48k/  
55k/60k  
40A  
50A  
5.5mm2  
8mm2  
44k/48k/  
50k/60k  
3 Phase  
80k  
16 Floor Standing type Air Conditioner  
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Installation of Unit  
Vacuum Drying of the Connecting Pipes and the Indoor Unit  
The air which contains moisture remaining in the refrigeration cycle may cause a malfunction on the  
compressor.  
1. Confirm that both the liquid side valve and the gas side valve are set to the closed position.  
2. After connecting the piping, check the joints for gas leakage with gas leak detector.  
3. Remove the service port nut, and connect the gauge manifold and the vacuum pump to the service  
port by the charge hose.  
4. Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below -  
76cmHg.  
5. Remove the valve stem nuts, and fully open the stems of the 2-way and 3-way valves with a hexagon  
wrench.  
6. Tighten the valve stem nuts of the 2-way valve and 3-way valve.  
7. Disconnect the charge hose and fit the nut to the service port.  
(Tightening torque: 1.8kg.m)  
Liquid side  
Indoor unit  
Closed  
Outdoor unit  
2-way valve/  
3-way valve  
Gas side  
3-way  
valve  
Closed  
Vaccum pump  
OPEN  
CLOSE  
Installation Manual 17  
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Installation of Unit  
Form the Piping  
1. Wrap the connecting portion of indoor unit  
with the insulation material and secure it with  
two Plastic Bands. (for the right piping)  
If you connect an additional drain hose,  
the end of the drain-outlet should be kept  
distance from the ground. (Do not dip it  
into water, and fix it on the wall to avoid  
swinging in the wind.)  
Gas side  
piping  
Main cable  
In case of the outdoor unit is installed below  
position of the indoor unit.  
2. Tape the Piping, and Connecting Cable from  
down to up.  
Tube PE  
Foam  
Connecting  
Cable  
3. Form the piping gathered by taping along the  
exterior wall and fix it onto the wall by saddle  
or equivalent.  
Connecting  
Cable  
(For heater)  
Trap is required to prevent the electrical parts  
from entering the water.  
In case of the outdoor unit is installed upper  
position of the indoor unit.  
Seal a small opening around  
the piping with gum type sealer.  
1. Tape the piping and connecting cable from  
down to up.  
Trap  
2. In order to prevent water from entering the  
room, form a trap and tape the piping.  
3. Fix the piping onto the wall with saddle or  
bracket.  
Drain water treatment of outdoor unit(Heat  
Pump Only)  
1. When using the drain elbow hose, use  
a mount of 3cm of higher.  
2. In the cold district (0°c(32°F) continued for 2~3  
day), the drain water is frozen and the fan fail  
to function, do not use the drain elbow.  
Drain elbow  
Hose(inner diameter ø20)  
Arrange the hose downward slope without waving.  
18 Floor Standing type Air Conditioner  
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Final Check and Test Run  
Final Check and Test Run  
After installing the unit, perform the final check  
and running test as follows:  
Running test should be accomplished as follows:  
Final check points  
Set operation switch at "FAN" and the fan  
will start. Check to ensure that the fan  
sounds normal.  
Is the unit securely mounted?  
Is the installation location adequate?  
Is the water piping work adequately and  
without leakage?  
Next, set it at "COOL" and the  
compressor will start. Check to ensure  
that the compressor sounds normal.  
Are trapped drain lines installed at  
condensate drain connections?  
Check discharge and suction pressure on  
the compound gauges.  
Has the refrigeration cooling cycle been  
kept sealed?  
Check working voltage, phase balance  
and running current.  
Is the electrical wiring adequate and are  
the screws tightened on terminals?  
Check to ensure that the thermistor  
functions properly.  
After the above final checkings, prepare the  
running test as follows:  
Check to ensure that the high pressure  
control switch functions correctly.  
Connect compound gauges to the check  
joints at discharge and suction sides of  
the compressor.  
Turn all switches "OFF".  
Turn the main switch "ON".  
Installation Manual 19  
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