Heat Controller Inc Air Conditioner MMC18DA 1 User Manual

HEAT CONTROLLER, INC.  
Wall Mounted Multi-Zone Split System  
MMC18DA-1 MMH18DA-1  
MMC24DA-1 MMH24DA-1  
MMC36TA-1 MMH36TA-1  
Air Conditioning / Heat Pump  
Installation Parts Provided  
Installation Parts Provided  
Standard Type  
Installation plate  
Type "A" screws and plastic anchors  
Remote Control Holder  
Type "B" screws  
18/24K BTU/h  
Air Intake  
(side, rear)  
more than 30 cm  
(11.8 inch)  
more than  
30 cm  
(11.8 inch)  
Control cover  
Connecting wire  
Connection pipe  
Drain hose  
more than  
more than  
70 cm  
60 cm  
(27.6 inch)  
(23.6 inch)  
Air Outlet  
36K BTU/h  
Air Intake  
(side, rear)  
more than 30 cm  
(11.8 inch)  
more than  
30 cm  
(11.8 inch)  
Control cover  
Connecting wire  
Connection pipe  
Drain hose  
more than  
more than  
70 cm  
60 cm  
(27.6 inch)  
(23.6 inch)  
Air Outlet  
Installation Manual  
3
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 instructions 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 electrically ground  
the product.  
There is risk of fire or electric Do not disassemble or repair  
There is risk of fire or electric  
shock.  
the product. There is risk of  
fire or electric shock.  
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 Improper wiring or installation There is risk of fire or electric  
shock.  
may cause fire or electric  
shock.  
shock.  
4
Wall Mounted Multi-Zone Split System Air Conditioner  
Safety Precautions  
For installation, always  
contact the dealer or an  
Authorized Service Center.  
Do not modify or extend the  
power cable.  
Be cautious when  
unpacking and installing  
the product.  
There is risk of fire or electric  
Sharp edges could cause  
There is risk of fire, electric  
shock.  
injury. Be especially careful of  
the case edges and the fins on  
the condenser and evaporator.  
shock, explosion, or injury.  
Do not install the product  
on a defective installation  
stand.  
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.  
Be sure the installation area  
does not deteriorate with age.  
It may cause injury, accident,  
or damage to the product.  
Moisture may condense and  
dampen or damage furniture.  
If the base collapses, the air  
conditioner could fall with it,  
causing property damage, product  
failure, and personal injury.  
Install the indoor unit on the wall where the  
height from the floor is more than 8 ft. (2.4m).  
Do not handle the pipe by yourself(customer)  
There are sharp moving parts that could cause  
personal injury.  
High-Pressure refrigent may cause personal  
injury.  
8ft(2.4m)  
Installation Manual  
5
Safety Precautions  
I Operation  
Do not store or use flammable gas or  
combustibles near the product.  
There is risk of fire or failure of product.  
Gasolin  
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.  
Keep level even when  
installing the product.  
Low refrigerant levels may  
A bad connection may cause  
To avoid vibration or water  
cause failure of product.  
water leakage.  
leakage.  
90°  
Do not install the product  
where the sound or hot air  
from the outdoor unit could  
be offensive to neighbors.  
Use two or more people to  
lift and transport the  
product.  
Do not install the product  
where it will be exposed to  
salt spray directly.  
It may cause a problem for  
your neighbors.  
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.  
6
Wall Mounted Multi-Zone Split System Air Conditioner  
Installation of Indoor, Outdoor Unit  
Installation of Indoor, Outdoor Unit  
Read completely, then follow step by step.  
Select the best location  
Indoor unit  
Indoor Unit  
1. Does not have any heat or steam near the  
unit.  
2. Select a place where there are no obstacles  
More than 10 cm  
(3.9 inch)  
More than 20 cm  
(7.9 inch)  
in front of the unit.  
3. Make sure that condensation drainage can be  
conveniently routed away.  
4. Do not install near a doorway.  
More than 2.4m  
5. Ensure the unit is unobstructed, allow proper  
space on all sides according to the arrows  
and distance measurements in the figures.  
6. Use a stud finder to locate studs to prevent  
unnecessary damage to the wall.  
(8 ft)  
More than 10 cm  
(3.9 inch)  
CAUTION: Install the indoor unit  
on the wall where the height from  
the floor is more than 2.4 m (8 ft).  
Outdoor unit  
18/24K BTU/h  
more than 30 cm  
(11.8 inch)  
1. If an awning is built over the unit to prevent  
direct sunlight or rain exposure, make sure  
that heat radiation from the condenser is not  
restricted.  
more than 30 cm  
(11.8 inch)  
2. Ensure the unit is unobstructed, allow proper  
space on all sides according to the arrows  
and distance measurements in the figures.  
more than 70 cm  
(27.6 inch)  
3. Do not place animals and plants in the path  
of the warm air.  
more than 60 cm  
(23.6 inch)  
4. Take the air conditioner weight into account  
and select a place where noise and vibration  
are minimum.  
more than 30 cm  
(11.8 inch)  
36K BTU/h  
5. Select a place so that the warm air and sound  
from the air conditioner does not disturb  
neighbors.  
more than 30 cm  
(11.8 inch)  
Rooftop Installations:  
If the outdoor unit is installed on a roof  
structure, be sure to level the unit. Ensure the  
roof structure and anchoring method are  
adequate for the unit location. Consult local  
codes regarding rooftop mounting.  
more than 70 cm  
(27.6 inch)  
more than 60 cm  
(23.6 inch)  
Installation Manual  
7
Installation of Indoor, Outdoor Unit  
Seaside Applications and Installation  
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  
in corrosion to the product. Particularly on the condenser and evaporator fins, could  
cause product malfunction or inefficient performance.  
3. If the outdoor unit is installed close to the seaside, ensure that it is not exposed directly to  
the sea wind.  
1. 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) To install the outdoor unit on the seaside, set up a windbreaker/barrier, to lessen the unit's exposure to sea air  
It should be strong enough (like concrete) to obstruct  
the wind from the sea.  
Windbreaker/Barrier  
The height and width should be more than 150% of  
the outdoor unit.  
Sea wind  
A minimum of 70cm (27.6inches)  
of space between outdoor unit and the windbreaker/  
barrier for easy air flow.  
3) Select a well-drained place.  
Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger  
using water is recommended.  
8
Wall Mounted Multi-Zone Split System Air Conditioner  
Installation of Indoor, Outdoor Unit  
Piping length and elevation  
Multi-Zone Piping Recommendations:  
Max total length Max length of  
Max Elevation  
Max elevation  
between each  
between indoor  
indoor unit and  
units (h2)  
Min length of  
each pipe  
(A/B/C)  
Capacity  
of all pipes  
each pipe  
(A/B/C)  
(A+B/A+B+C)  
outdoor unit (h1)  
18K BTU/h  
24K BTU/h  
36K BTU/h  
30 m (100 ft)  
30 m (100 ft)  
45 m (150 ft)  
15 m (50 ft)  
15 m (50 ft)  
15 m (50 ft)  
3 m (10 ft)  
3 m (10 ft)  
3 m (10 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
Pipe Size  
Indoor Capacity  
Additional  
Refrigerant  
Gas (Flare)  
Liquid (Flare)  
Standard Length  
9K BTU/h  
9.52 mm (3/8")  
9.52 mm (3/8")  
6.35 mm (1/4")  
6.35 mm (1/4")  
7.5 m (25 ft)  
7.5 m (25 ft)  
20 g/m (0.22 oz/ft)  
20 g/m (0.22 oz/ft)  
12K BTU/h  
36K BTU/h  
18/24K BTU/h  
A
A
h2  
h2  
h2  
B
B
h1  
h1  
C
h1  
h1  
h1  
B
CAUTION: Capacity is based on standard length and maximum allowance  
length based on reliability.  
Installation Manual  
9
Installation of Indoor, Outdoor Unit  
Mounting Installation Plate  
The wall you select should be strong and solid  
enough to prevent vibration  
Installation Plate  
1. Mount the installation plate on the wall with  
type "A" screws. If mounting the unit on a  
concrete wall, use anchor bolts.  
Mount the installation plate horizontally by  
aligning the centerline using a level.  
Chassis  
Hook  
Type "A" screw  
2. Measure the wall and mark the centerline. It  
is also important to use caution concerning  
the location of the installation plate-routing  
of the wiring to power outlets is through the  
walls typically.  
Distance mm (inch)  
CHASSIS  
(Grade)  
A
B
C
D
9K BTU/h  
50 (1.97) 105 (4.13) 59 (2.32) 105 (4.13)  
65 (2.56) 110 (4.33) 85 (3.35) 110 (4.33)  
12K BTU/h  
Installation plate  
B
D
A
C
Ø 70 mm  
Ø 2.75 inch  
Ø 70 mm  
Ø 2.75 inch  
Left rear piping  
Right rear piping  
Drilling the hole in the wall  
Drill the piping hole with a Ø 70 mm (Ø 2.75 inch) hole core drill. Drill the piping hole at either  
the right or the left with the hole slightly slanted to the outdoor side.  
WALL  
Indoor  
Outdoor  
10 Wall Mounted Multi-Zone Split System Air Conditioner  
Flaring Work and Connection of Piping  
Flaring Work and Connection of Piping  
Flaring work  
Main cause for gas leakage is due to defect in flaring work. Carry out the correct flaring work by  
using the following procedures.  
Cut the pipes  
1. Use the piping kit accessory or the pipes  
purchased locally.  
Copper  
pipe  
Slanted Uneven Rough  
2. Measure the distance between the indoor and  
the outdoor unit.  
90°  
3. Cut the pipes a little longer than measured  
distance.  
4. Cut the cable 1.5 m (5.0 ft) longer than the pipe  
length.  
Pipe  
Burrs removal  
Reamer  
1. Completely remove all burrs from the cut cross  
section of pipe/tube.  
Point down  
2. Put the end of the copper tube/pipe in a  
downward direction as you remove burrs in  
order to avoid dropping burrs into the tubing.  
Flare nut  
Putting flare nuts on  
1. Remove flare nuts attached to indoor and  
outdoor unit, then put them on pipe/tube having  
completed burr removal.  
Copper tube  
(not possible to put them on after flaring work)  
Flaring work  
1. Carry out flaring work using flaring tool as  
shown below.  
2. Firmly hold copper pipe in a bar in the  
dimension shown in the table below.  
Handle  
Yoke  
Bar  
Bar  
Cone  
Outside diameter  
A
mm  
Ø6.35  
Ø9.52  
inch  
1/4  
3/8  
mm  
1.1~1.3  
1.5~1.7  
inch  
0.4 - 0.5  
0.6 - 0.7  
Copper pipe  
Clamp handle  
Red arrow mark  
Installation Manual 11  
Flaring Work and Connection of Piping  
Check  
Smooth all round  
1. Compare the flared work with the figure on  
the right.  
Inside is shiny without scratches  
2. If a flared section is defective, cut it off and  
repeat the flaring process again.  
= Improper flaring =  
Inclined Surface Cracked Uneven  
damaged  
thickness  
Even length  
all round  
Connecting the Piping  
Indoor  
1. Prepare the indoor unit's piping and drain hose for installation through the wall.  
2. Remove the plastic tubing retainer(see the  
illustration on the right) and pull the tubing  
and drain hose away from chassis.  
For right rear piping  
1. Route the indoor tubing and the drain hose in  
the direction of rear right.  
2. Insert the connecting cable into the indoor unit  
from the outdoor unit through the piping hole.  
Do not connect the cable to the indoor unit.  
Make a small loop with the cable for easy  
Drain hose  
connection later.  
3. Tape the tubing, drain hose, and the  
connecting on cable. Be sure that the drain  
hose is located on the lowest side of the  
bundle. Locating on the upper side can cause  
the condensation to overflow in the drain pan  
inside the indoor unit.  
If the drain hose is routed inside the room,  
insulate the hose with an insulation material*  
so that dripping from "sweating"(condensation)  
will not damage furniture or floors.  
*Foamed polyethylene or equivalent is  
recommended.  
Tape  
Connecting  
pipe  
Drain hose  
Connecting cable  
12 Wall Mounted Multi-Zone Split System Air Conditioner  
Flaring Work and Connection of Piping  
4. Indoor unit installation  
Hook the indoor unit onto the upper portion of  
the installation plate.(Engage the two hooks  
of the rear top of the indoor unit with the  
upper edge of the installation plate.) Ensure  
that the hooks are properly seated on the  
installation plate by moving it left and right.  
Connecting  
cable  
Drain hose  
Press the lower left and right sides of the unit  
against the installation plate until the hooks  
engage into their slots(clicking sound).  
Connecting the piping to the indoor unit and  
drain hose to drain pipe.  
1. Align the center of the pipes and sufficiently  
tighten the flare nut by hand.  
Indoor unit tubing  
Flare nut Pipes  
2. Tighten the flare nut with a wrench.  
Open-end wrench (fixed)  
Outside diameter  
Torque  
mm  
Ø6.35  
Ø9.52  
inch  
1/4  
3/8  
kgf.m (lbf-ft)  
1.8 ~ 2.5 (13)  
3.4 ~ 4.2 (20)  
Flare nut  
Wrench  
Connection pipe  
Indoor unit tubing  
3. Next, extend the indoor unit's drain hose.  
Then attach the drain pipe.  
Drain pipe  
Indoor unit drain hose  
Vinyl tape(narrow)  
Adhesive  
Wrap the insulation material around all  
connections.  
Plastic bands  
Insulation material  
1. Overlap the connection pipe insulation  
material and the indoor unit pipe insulation  
material. Bind them together with vinyl tape  
so that there is no gap.  
Indoor unit pipe  
Wrap with vinyl tape  
Connection pipe  
Vinyl tape (wide)  
2. Wrap the area which accommodates the rear  
piping housing section with vinyl tape.  
Connecting cable  
Pipe  
Vinyl tape(narrow)  
3. Bundle the piping and drain hose together by  
wrapping them with vinyl tape for enough to  
cover where they fit into the rear piping  
housing section.  
Wrap with vinyl tape  
Pipe  
Vinyl tape(wide)  
Drain hose  
Installation Manual 13  
Flaring Work and Connection of Piping  
For left rear piping  
1. Route the indoor tubing and the drain hose to  
the required piping hole position.  
Connecting  
cable  
2. Insert the piping, drain hose, and the  
connecting cable into the piping hole.  
3. Insert the connecting cable into the indoor unit.  
Don't connect the cable to the indoor unit.  
Make a small loop with the cable for easy  
connection later.  
Drain pipe  
4. Tape the drain hose and the connecting  
cables.  
5. Indoor unit installation  
Hang the indoor unit from the hooks at the  
top of the installation plate.  
Indoor unit  
Spacer  
Insert the spacer between the indoor unit  
and the installation plate and separate the  
bottom of the indoor unit from the wall.  
Installation plate  
8 cm  
(3.15 inch)  
Connecting the piping to the indoor unit and  
the drain hose to drain pipe.  
1. Align the center of the pipes and sufficiently  
tighten the flare nut by hand.  
Indoor unit tubing  
Flare nut Pipes  
2. Tighten the flare nut with a wrench.  
Open-end wrench (fixed)  
Outside diameter  
Torque  
mm  
Ø6.35  
Ø9.52  
inch  
1/4  
3/8  
kgf.m (lbf-ft)  
1.8 ~ 2.5 (13)  
3.4 ~ 4.2 (20)  
Flare nut  
Wrench  
Connection pipe  
Indoor unit tubing  
3. Next, extend the indoor unit's drain hose.  
Then attach the drain pipe.  
Drain hose  
Indoor unit drain hose  
Vinyl tape (narrow)  
Adhesive  
14 Wall Mounted Multi-Zone Split System Air Conditioner  
Flaring Work and Connection of Piping  
Wrap the insulation material around the  
connecting portion.  
Plastic bands  
Insulation material  
1. Overlap the connection pipe insulation and  
the indoor unit pipe heat insulation material.  
Bind them together with vinyl tape so that  
there is no gap.  
Indoor  
unit piping  
2. Wrap the area which accommodates the rear  
piping housing section with vinyl tape.  
Connection  
pipe  
Vinyl tape  
(wide)  
Wrap with vinyl tape  
Pipe  
Vinyl tape(narrow)  
Connecting cable  
Drain hose  
Pipe  
3. Bundle the piping and drain hose together by  
wrapping them with vinyl tape over the range  
within which they fit into the rear piping  
housing section.  
Vinyl tape(narrow)  
Wrap with  
vinyl tape(wide)  
Reroute the piping and the drain hose  
across the back of the chassis.  
Piping for  
passage through  
piping hole  
Indoor unit installation  
1. Remove the spacer.  
Connecting  
cable  
2. Ensure that the hooks are properly seated on  
the installation plate by moving it left and  
right.  
Drain hose  
3. Press the lower left and right sides of the unit  
against the installation plate until the hooks  
engage into their slots(clicking sound).  
Installation Manual 15  
Flaring Work and Connection of Piping  
Installation Information. For left piping. Follow the instruction below.  
Best Practice  
Press on the upper side of clamp and unfold the tubing to slowly downward.  
Worst Practice  
Bending the pipe from right to left may cause damage to the tubing.  
16 Wall Mounted Multi-Zone Split System Air Conditioner  
Flaring Work and Connection of Piping  
Outdoor  
Align the center of the piping and sufficiently  
tighten the flare nut by hand.  
Finally, tighten the flare nut with a torque  
wrench until the wrench clicks.  
Outdoor unit  
18/24K BTU/h  
When tightening the flare nut with the torque  
wrench, ensure the direction for tightening  
follows the arrow on the wrench.  
A-UNIT  
Gas side piping  
Outside diameter  
Torque  
mm  
Ø6.35  
Ø9.52  
inch  
1/4  
3/8  
kgf.m (lbf-ft)  
1.8 ~ 2.5 (13)  
3.4 ~ 4.2 (20)  
B-UNIT  
Liquid side piping  
Torque wrench  
Outdoor unit  
36K BTU/h  
A-UNIT  
Gas side piping  
B-UNIT  
Liquid side piping  
C-UNIT  
Torque wrench  
Installation Manual 17  
Connecting the Cable between Indoor Unit and Outdoor Unit  
Connecting the Cable between Indoor Unit and Outdoor Unit  
Connect the cable to the Indoor unit  
Connect the cable to the indoor unit by connecting the wires to the terminals on the control  
board individually according to the outdoor unit connection. (Ensure that the color of the wires  
of the outdoor unit and the terminal No. are the same as those of the indoor unit.)  
The ground wire should be longer than the common wires.  
The circuit diagram is subject to change without notice.  
When installing, refer to the electrical diagram behind the front panel of Indoor Unit.  
The wiring for the outdoor unit can be found on the inside of the Outdoor Unit control cover.  
RECOMMENDATION:  
• The circuit diagram is subject to change without notice.  
• Be sure to connect wires according to the wiring diagram.  
• Connect the wires firmly, so that they can not be pulled out easily.  
• Connect the wires according to color codes by referring to the wiring diagram.  
RECOMMENDATION:  
Main power source  
Provide a  
circuit breaker between power  
source and the outdoor unit as  
Air  
Circuit Breaker  
Use a circuit breaker  
or time delay fuse.  
shown below.  
Conditioner  
RECOMMENDATION: The power cord connected to the outdoor unit should  
comply with the following specifications: ETL recognized and CSA certified.  
AWG12 (Allowable temperature  
to the wire rated at least 90C˚)  
18 / 24K BTU/h  
36K BTU/h  
AWG14  
Line voltage (208~230V)  
Line voltage (208~230V)  
The power connecting cable connected to the indoor and outdoor unit  
should be comply with the following specifications: ETL recognized and  
CSA certified.  
AWG18  
Low voltage (below 40V)  
RECOMMENDATION: When using the separate wires as the power cord, please secure  
the separate wires into the control box panel using tie wraps to hold all wires  
together in place.  
18 Wall Mounted Multi-Zone Split System Air Conditioner  
Connecting the Cable between Indoor Unit and Outdoor Unit  
Connect the cable to the Outdoor unit  
1. Remove the control cover from the unit by  
loosening the screws.  
Outdoor unit  
Connect the wires to the terminals on the  
control board individually per the following.  
Terminal block  
Over 5 mm  
(0.2 inch)  
2. Secure the cable onto the control board with  
the holder (clamper).  
Holder for  
power supply  
cord  
3. Re-attach the control cover to the original  
position using the screws.  
18K BTU/h  
Power supply  
cable  
Teminal on the Indoor Unit  
A-UNIT  
Teminal on the Indoor Unit  
B-UNIT  
1
2
3
4
1
2
3
4
Control cover  
Connecting cable(Low voltage)  
Connecting  
cable  
L1  
L2  
1
2
3
4
1
2
3
4
Teminal on the Outdoor Unit  
Teminal on the Outdoor Unit  
A Indoor  
B Indoor  
Power Source  
208/230V AC  
(High voltage)  
24K BTU/h  
Teminal on the Indoor Unit  
A-UNIT  
Teminal on the Indoor Unit  
B-UNIT  
1
1
2
3
4
1
2
3
4
Connecting cable(Low voltage)  
2
3
4
1
2
3
4
L1  
L2  
Teminal on the Outdoor Unit  
Teminal on the Outdoor Unit  
Teminal on the Outdoor Unit  
A Indoor  
B Indoor  
Power Source  
208/230V AC  
(High voltage)  
36K BTU/h  
Teminal on the Indoor Unit  
A-UNIT  
Teminal on the Indoor Unit  
B-UNIT  
Teminal on the Indoor Unit  
C-UNIT  
1
1
2
3
4
1
2
3
4
1
2
3
4
Connecting cable(Low voltage)  
2
3
4
1
2
3
4
1
2
3
4
L1  
L2  
Teminal on the Outdoor Unit  
Teminal on the Outdoor Unit  
Teminal on the Outdoor Unit  
Teminal on the Outdoor Unit  
A Indoor  
B Indoor  
C Indoor  
Power Source  
208/230V AC  
(High voltage)  
NOTICE  
:
1. Separately wire the high and low voltage lines.  
2. Use heat resistant electrical wiring capable of withstanding temperatures up to 75°C(167°F).  
3. Use outdoor waterproof connection cable rated for at least 300V for the connection between  
indoor and outdoor unit. (For example, Type SJO-WA)  
WARNING:  
Be sure to comply with local and national codes while running the wire from the  
indoor unit to the outdoor unit(size of wire and wiring method, etc).  
Every wire must be connected firmly.  
No wire should be allowed to touch refrigerant tubing, the compressor or any  
moving parts.  
Installation Manual 19  
Connecting the Cable between Indoor Unit and Outdoor Unit  
Methods of connecting the cable  
(1) Remove two-caps on the conduit panel.  
(for low voltage line)  
(2) Pull the connection cable through conduit.  
(3) After conduit is through the panel, secure the nut  
on the opposite side of panel.  
Terminal  
block  
(4) Pass the connection cable through the hole.  
(5) Properly connect the cable onto the terminal  
block.  
Cord clamp  
Cap(Reuse)  
G
Lock nut  
(6) Secure the connection cable with cord clamp  
provided on the unit to reduce strain at the  
terminal when the connection cable is pulled  
outside up to a 35 pound weight  
Hole  
(for low voltage line)  
Cap(Remove)  
Taping  
(for sealing)  
WARNING: Loose wiring may cause  
the terminal to overheat or result in  
unit malfunction. A fire hazard may  
also exist. Therefore, be sure all  
wiring is tightly connected.  
Power supply line Conduit panel  
(1ø, 230/208V)  
Low voltage line  
(connecting cable)  
When connecting each power wire to the  
corresponding terminal, follow instructions "How  
to connect wiring to the terminals" and fasten the  
wire tightly using the screw on of the terminal  
plate.  
How to connect wiring to the terminals  
High voltage  
For strand wiring  
(1) Cut the wire end with a wire cutter or wire-  
cutting pliers, then strip the insulation to  
expose the strand wiring about 10 mm(3/8").  
(2) Using a screwdriver, remove the terminal  
screw(s) on the terminal plate.  
Strand wire  
Round  
terminal  
(3) Using a round terminal fastener or pliers,  
securely clamp each stripped wire end with a  
round terminal.  
(4) Position the round terminal wire, and replace  
by tightening the terminal screw using a  
screwdriver.  
Low voltage  
Loosening the  
terminal block  
screw  
Fastening the  
wire tightly  
Connecting cable  
20 Wall Mounted Multi-Zone Split System Air Conditioner  
Connecting the Cable between Indoor Unit and Outdoor Unit  
CAUTION: Provide a circuit breaker between power source and the unit  
as shown below.  
Main power source  
Fuse or breaker  
Model  
Power source  
Capacity  
Air  
18K BTU/h 1Ø, 230 / 208V  
24K BTU/h 1Ø, 230 / 208V  
36K BTU/h 1Ø, 230 / 208V  
20 A  
25 A  
40 A  
Circuit Breaker  
Use a circuit  
breaker or time  
delay fuse.  
Conditioner  
Connect the cable to the indoor unit  
1. Connect the wires to the terminals on the  
control board individually according to the  
outdoor unit connection.  
Ensure that the color of the wires of outdoor  
unit and the terminal No. are the same as  
those of indoor unit respectively.  
Connecting cable  
2. Attach the Grille onto the cabinet.  
Grasp the lower left and right side of the  
Grille and engage four tabs on the top inside  
edge of the chassis.  
Press the Grille toward the chassis until it  
goes back into place.  
Installation Manual 21  
Checking the Drainage, Insulating the Pipe and Special Piping Applications  
Checking the Drainage, Insulating the Pipe and Special Piping Applications  
Checking the drainage  
To check the drainage.  
1. Pour a glass of water into the evaporator.  
2. Ensure the water flows through the drain  
hose of the indoor unit without any leakage  
and goes out through the drain exit.  
Drain piping  
1. The drain hose should point downward for  
optimum drainage.  
Downward slope  
2. Incorrect Installation Examples:  
Accumulated  
drain water  
Air  
Do not raise  
Less than  
50mm gap  
Tip of drain hose  
dipped in water  
Water  
leakage  
Water  
leakage  
Water  
leakage  
Kinking  
Ditch  
22 Wall Mounted Multi-Zone Split System Air Conditioner  
Checking the Drainage, Insulating the Pipe and Special Piping Applications  
Insulating the Pipe and Special Piping Applications  
Insulate the piping by wrapping the  
connecting portion of the indoor  
unit with insulation material and  
secure it with two kinds of vinyl  
Seal a small  
opening around  
the pipings with  
gum type sealant.  
Taping  
Drain hose  
tape.  
If you want to connect an additional drain  
hose, the end of the drain outlet should be  
Plastic  
routed above the ground. Secure the drain  
hose appropriately.  
Pipings  
band  
Connecting  
cable  
In cases where the outdoor unit is  
installed below the indoor unit  
perform the following:  
Power supply  
cord  
1. Tape the piping, drain hose and connecting  
cable from down to up.  
2. Secure the taped piping along the exterior  
wall using saddle or equivalent.  
Trap is required to prevent water from entering  
into electrical parts.  
In cases where the Outdoor unit is  
installed above the Indoor unit  
perform the following.  
1. Tape the piping and connecting cable from  
down to up.  
Seal a small opening  
around the pipings  
with gum type sealant.  
Trap  
2. Secure the taped piping along the exterior  
wall. Form a trap to prevent water entering  
the room.  
3. Secure the piping onto the wall using a  
saddle or equivalent.  
Trap  
Installation Manual 23  
Air Purging and Evacuation  
Air Purging and Evacuation  
Air and moisture remaining in the refrigerant system have undesirable effects as indicated below.  
1. Pressure in the system rises.  
2. Operating current rises.  
3. Cooling(or heating) efficiency drops.  
4. Moisture in the refrigerant circuit may freeze and block capillary tubing.  
5. Water may lead to corrosion of parts in the refrigeration system.  
Therefore, the indoor/outdoor unit and connecting tube must be checked for leaks and vacuumed  
to remove incondensible gas and moisture in the system.  
Leak Checking  
1. Do a leakage test of all joints of the  
tubing(both indoor and outdoor) and both gas  
and liquid side service valves with soap  
bubbles.  
Bubbles indicate a leak. Be sure to wipe off  
the soap with a clean cloth.  
Preparation  
Check that each tube(both liquid and gas side  
tubes) between the indoor and outdoor units have  
been properly connected and all wiring for the test  
run has been completed. Remove the service  
valve caps from both the gas and the liquid sides  
on the outdoor unit. Check that both the liquid and  
the gas side service valves on the outdoor unit  
are kept closed at this stage.  
2. After the system is found to be free of leaks,  
relieve the nitrogen pressure by loosening the  
charge hose connector at the nitrogen  
cylinder. When the system pressure is  
reduced to normal, disconnect the hose from  
the cylinder.  
Leakage test  
Connect the manifold valve(with pressure gauges)  
and dry nitrogen gas cylinder to this service port  
with charge hoses.  
Indoor unit  
CAUTION: Be sure to use a  
manifold valve for leak testing.  
The high side manifold valve must  
always be kept closed.  
Outdoor unit  
Pressurize the system to no more than 150  
P.S.I.G. with dry nitrogen gas and close the  
cylinder valve when the gauge reading  
reached 150 P.S.I.G. Next, test for leaks with  
liquid soap.  
Manifold valve  
Pressure  
CAUTION: To avoid nitrogen  
entering the refrigerant system in a  
liquid state, the top of the cylinder must be  
higher than its bottom when you pressurize  
the system. Usually, the cylinder is used in  
a vertical standing position.  
Lo  
Hi  
gauge  
Charge hose  
Nitrogen gas  
cylinder(in vertical  
standing position)  
NOTICE  
:
Leakage testing should be done  
for each indoor unit connection set,  
separately.  
24 Wall Mounted Multi-Zone Split System Air Conditioner  
Air Purging and Evacuation  
Evacuation  
1. Connect the charge hose end described in  
the preceding steps to the vacuum pump to  
evacuate the tubing and indoor unit.  
Confirm the "Lo" knob of the manifold valve is  
open. Then, run the vacuum pump.  
Indoor unit  
The operation time for evacuation varies with  
tubing length and capacity of the pump.  
[Each Room] The vacuum pump must be  
operated less than 0.8torr (0.015 psi) of the  
gage pressure.  
Outdoor unit  
2. When the desired vacuum is reached, close  
the "Lo" knob of the manifold valve and stop  
the vacuum pump.  
Finishing the job  
1. With a service valve wrench, turn the valve  
stem of liquid side valve counter-clockwise to  
fully open the valve.  
Manifold valve  
Pressure  
gauge  
Lo  
Hi  
2. Turn the valve stem of gas side valve  
counter-clockwise to fully open the valve.  
3. Loosen the charge hose connected to the  
gas side service port slightly to release the  
pressure, then remove the hose.  
Open  
Close  
4. Replace the flare nut and its bonnet on the  
gas side service port and fasten the flare nut  
securely with an adjustable wrench. This  
process is very important to prevent leakage  
from the system.  
Vacuum pump  
5. Replace the valve caps at both gas and liquid  
side service valves and fasten them tight.  
This completes air purging with a vacuum  
pump.  
The air conditioner is now ready for test  
running.  
NOTICE  
: Repeat evacuation procedure for each  
indoor unit.  
Installation Manual 25  
Charging  
Charging  
I
Each outdoor unit is factory charged (see rating plate) for the evaporator as well as a 7.5 m (25 ft) line  
set for each indoor line.  
Any time total line set is used either shorter or longer then the nominal, which is for Single Zone  
= 7.5m, Dual Zone = 15m, and Tri-Zone = 22.5 (Single Zone = 25ft, Dual Zone = 50ft, and Tri  
Zone = 75 ft), the line set length the refrigerant charge has to be adjusted.  
I Whether the line set is made shorter or longer you must adjust the charge based on how many ft  
of tubing are either added or removed based on 20 g (0.22 oz) of R410A per meter(foot).  
Max Elevation  
between each  
indoor unit and  
outdoor unit (h1)  
Max elevation  
between  
indoor units  
(h2)  
Max total  
length of all  
pipes (A+B+C)  
Max length of Min length of  
Additional  
Refrigerant  
Capacity  
each pipe  
(A/B/C)  
each pipe  
(A/B/C)  
18K BTU/h  
24K BTU/h  
36K BTU/h  
30 m (100 ft)  
30 m (100 ft)  
45 m (150 ft)  
15 m (50 ft)  
15 m (50 ft)  
15 m (50 ft)  
3 m (10 ft)  
3 m (10 ft)  
3 m (10 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
20 g/m (0.22 oz/ft)  
20 g/m (0.22 oz/ft)  
20 g/m (0.22 oz/ft)  
Example: A 80 ft line set is used for tri - zone 5 additional ft X 0.22 ounces per foot= add 1.1  
ounces of R410A  
Important:  
If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge using  
the charge amount specified on the unit's rating plate, adjusting for line sets longer or shorter than  
7.5 m(25 ft) for each indoor unit.  
26 Wall Mounted Multi-Zone Split System Air Conditioner  
Test Running  
Test Running  
1. Check that all tubing and wiring have been properly connected.  
2. Check that the gas and liquid side service valves are fully open.  
Prepare remote control  
Remove the battery cover by pulling it according  
to the arrow direction.  
Insert new batteries making sure that the (+) and  
() of battery are installed correctly.  
Reattach the cover by pushing it back into  
position.  
Bolt  
NOTICE  
:
Use 2 AAA(1.5volt) batteries. Do not use  
rechargeable batteries.  
Remove the batteries from the remote control if  
the system is not going to be used for a long  
time.  
Tubing connection  
Evaluation of the performance  
Operate all indoor units for 15~20 minutes, then  
check the system refrigerant charge:  
Intake temperature  
1.Measure the pressure of one of the gas side  
service valves.  
Discharge air  
2. Measure the temperature of the intake and  
discharge of air.  
3. Ensure the difference between the intake air  
temperature and the discharge air is more  
than 8°C(14.4°F).  
4. For reference, optimum gas pressure for  
cooling is shown below.  
Discharge  
temperature  
Outside ambient  
TEMP.  
The pressure of the gas side  
service valve.  
Refrigerant  
R410A  
35°C (95°F) 8.5 ~ 9.5 kg/cm2G (120 ~ 135 P.S.I.G)  
NOTICE  
:
If the actual pressure is higher than  
shown, the system is most likely over-charged, and  
charge should be removed. If the actual pressure is  
lower than shown, the system is most likely  
undercharged, and charge should be added.  
Important:  
Individual zones should be all in the same  
operation mode (Heating or Cooling mode)  
Installation Manual 27  
Specifications and performance data subject to change without notice.  
03-18-08  
P/No. : MFL39059502  

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