Heat Controller DMC24DB 1 User Manual

HEAT CONTROLLER, INC.  
Wall Mounted  
Multi-Split System  
Air Conditioning/Heat Pump  
DMC24DB-1  
DMH24DB-1  
Before servicing the unit, read the  
“safety precautions” in this manual.  
Only for authorized service personnel.  
Combination table  
Combination table  
Cooling  
Heating  
Combination of Indoor Unit(kBtu/h)  
Operation  
Each Capacity  
Total Capacity  
Each Capacity  
Total Capacity  
Unit-A  
12  
Unit-B  
12  
Total  
12  
UNIT-A(Btu/h) UNIT-B(Btu/h)  
Btu/h  
12000  
kW  
UNIT-A(Btu/h) UNIT-B(Btu/h)  
Btu/h  
12000  
kW  
12000  
12000  
-
3516  
7033  
12000  
12000  
-
3516  
1 Unit  
2 Unit  
12  
24  
12000  
24000  
12000  
24000  
7033  
Notes :  
1.Cooling Capacity is based on : indoor temp. 26.7°C(80.1°F)DB, 19.4°C(66.9°F)WB; outdoor temp. 35°C(95°F)DB, 23.9°C(75°F)WB  
2.Heating Capacity is based on : indoor temp. 21.1°C(70°F)DB, 15.6°C(60.1°F)WB; outdoor temp. 8.3°C(46.9°F)DB, 6.1°C(43°F)WB  
3.The total ability of connected a indoor unit is up to 24k Btu/h  
Symbols Used in this Manual  
This symbol alerts you to the risk of electric shock.  
This symbol alerts you to hazards that could cause harm to the  
air conditioner.  
NOTICE  
This symbol indicates special notes.  
Service Manual 3  
Safety Precautions  
Safety Precautions  
To prevent injury to the user or other people and property damage, the following instructions must  
be followed.  
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  
CAUTION This symbol indicates the possibility of injury or damage to properties only.  
Meanings of symbols used in this manual are as shown below.  
Be sure not to do.  
Be sure to follow the instruction.  
WARNING  
Installation  
Do not use a defective or under-  
rated 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 cir-  
cuit and breaker.  
Use the correctly rated break-  
er or fuse.  
• There is risk of fire or electric  
shock.  
• Improper wiring or installation may • There is risk of fire or electric  
cause fire or electric shock shock.  
4 Multi type Air Conditioner  
Safety Precautions  
Do not install, remove, or re-  
install the unit by yourself  
(customer).  
Be cautious when unpacking  
and installing the product.  
For installation, always con-  
tact the dealer or an  
Authorized Service Center.  
• There is risk of fire, electric shock, • Sharp edges could cause injury.  
• There is risk of fire, electric shock,  
explosion, or injury.  
explosion, or injury.  
Be especially careful of the case  
edges and the fins on the con-  
denser and evaporator.  
Do not install the product on a Be sure the installation area  
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.  
defective installation stand.  
does not deteriorate with age.  
• It may cause injury, accident, or  
damage to the product.  
• If the base collapses, the air condi- • Moisture may condense and wet or  
tioner could fall with it, causing  
property damage, product failure,  
and personal injury.  
damage furniture.  
Do not allow water to run into  
electric parts.  
Do not store or use flammable Do not use the product in a  
gas or combustibles near the  
product.  
tightly closed space for a long  
time.  
• It may cause There is risk of fire,  
failure of the product, or electric  
shock.  
• There is risk of fire or failure of  
product.  
• Oxygen deficiency could occur.  
Gasolin  
Service Manual 5  
Safety Precautions  
When flammable gas leaks,  
turn off the gas and open a  
window for ventilation before  
turn the product on.  
If strange sounds, or smoke  
comes from product. Turn the  
breaker off.  
Stop operation and close the  
window in storm or hurricane.  
If possible, remove the prod-  
uct from the window before  
the hurricane arrives.  
• Do not use the telephone or turn  
switches on or off. There is risk of  
explosion or fire  
• There is risk of electric shock or  
fire.  
• There is risk of property damage,  
failure of product, or electric shock.  
Do not open the inlet grill of the product  
during operation. (Do not touch the elec-  
trostatic filter, if the unit is so equipped.)  
When the product is soaked  
(flooded or submerged), contact not enter the product.  
an Authorized Service Center.  
Be cautious that water could  
• There is risk of physical injury,  
electric shock, or product failure.  
• There is risk of fire or electric  
shock.  
• There is risk of fire, electric shock,  
or product damage.  
Ventilate the product from time to time when  
operating it together with a stove, etc.  
Turn the main power off when cleaning or  
maintaining the product.  
• There is risk of fire or electric shock.  
• There is risk of electric shock.  
6 Multi type Air Conditioner  
Safety Precautions  
When the product is not to be used for a long time,  
disconnect the power by turning off the breaker.  
Take care to ensure that nobody could step on  
or fall onto the outdoor unit.  
• There is risk of product damage or failure, or unintend- • This could result in personal injury and product dam-  
ed operation.  
age.  
CAUTION  
Installation  
Always check for gas (refrigerant) leak-  
age 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 cause  
failure of product.  
• A bad connection may cause water • To avoid vibration or water leak-  
leakage.  
age.  
90°  
Do not install the product  
where the noise or hot air  
from the outdoor unit could  
oftend neighbors.  
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.  
• 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.  
Service Manual 7  
Safety Precautions  
Operational  
Do not expose the skin direct-  
ly to cool air for long periods  
of time.  
Do not use the product for  
special purposes, such as  
preserving foods, works of  
art, etc. It is a consumer air  
conditioner, not a precision  
refrigeration system.  
Do not block the inlet or outlet  
of air flow.  
(Don't sit in the draft.)  
This could harm to your health.  
There is risk of damage or loss of  
It may cause product failure.  
property.  
Use a soft cloth to clean. Do  
not use harsh detergents, sol-  
vents, etc.  
Do not touch the metal parts of Do not step on or put anyting  
the product when removing the on the product. (outdoor  
air filter. They are very sharp!  
units)  
There is risk of fire, electric shock, There is risk of personal injury.  
or damage to the plastic parts of  
There is risk of personal injury and  
failure of product.  
the product.  
Always insert the filter secure- Do not insert hands or other  
Do not drink the water drained  
ly. Clean the filter every two  
weeks or more often if neces-  
sary.  
objects through the air inlet or from the product.  
outlet while the product is  
operated.  
A dirty filter reduces the efficiency of There are sharp and moving parts It is not sanitary and could cause  
the air conditioner and could cause  
product malfunction or damage.  
that could cause personal injury.  
serious health issues.  
8 Multi type Air Conditioner  
Safety Precautions  
Use a firm stool or ladder when cleaning or  
maintaining the product.  
Replace the all batteries in the remote control  
with new ones of the same type. Do not mix  
old and new batteries or different types of bat-  
teries.  
Be careful and avoid personal injury.  
There is risk of fire or explosion  
Do not recharge or disassemble the batteries.  
Do not dispose of batteries in a fire.  
If the liquid from the batteries gets onto your  
skin or clothes, wash it well with clean water.  
Do not use the remote if the batteries have  
leaked.  
They may burn or explode.  
The chemicals in batteries could cause burns or other  
health hazards.  
Service Manual 9  
Dimensions  
Dimensions  
Indoor Unit  
Split Type Indoor  
H
D
W
Installation plate  
Model  
Split Type(SE)  
12 kBtu/h  
Dimension  
W
H
mm(in)  
mm(in)  
mm(in)  
895(35.2)  
282(11.1)  
165(6.5)  
D
10 Multi type Air Conditioner  
Dimensions  
Outdoor Unit  
W
L6  
L5  
L7  
MODEL  
UE1  
24kBtu/h  
DIM  
W
mm(in)  
870(34.3)  
800(31.5)  
320(12.6)  
370(14.6)  
25(1.0)  
H
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
D
L1  
L2  
L3  
L4  
L5  
L6  
L7  
775(30.5)  
25(1.0)  
546(21.5)  
160(6.3)  
160(6.3)  
Service Manual 11  
Product Specifications  
Product Specifications  
DMC24DB-1  
Operation  
Unit  
Remarks  
1-Unit On  
2-Unit On  
Item  
23,600/24,000  
11,800/12,000  
208/230V  
Cooling Capacity  
Heating Capacity  
Moisture Removal  
Power Source  
Btu/h  
-
-
/h(ft3/h)  
2.4(0.085)  
1.2(0.042)  
at 230V  
1Ø, 208/230V, 60Hz  
ø, V, Hz  
Indoor  
9.4(331.9)  
36/32/29  
3
Air Circulation  
m /min(ft3/min)  
Outdoor  
Indoor  
53(1871.8)  
54  
Noise Level  
( Hi / Med / Low )  
dB(A)  
at 230V  
Outdoor  
Cooling  
2,390/2,390  
1,420/1,420  
Input  
W
A
Heating  
Cooling  
Heating  
Cooling  
Heating  
-
-
10.1/10.1  
6.3/6.3  
Runnig  
Current  
E.E.R.  
C.O.P.  
208/230V  
-
-
.
Btu/h w  
9.9/10.1  
-
8.3/8.5  
-
-
Indoor  
895 x 282 x 165(35.2x11.1x6.5)  
Dimensions(W x H x D)  
Net. Weight  
mm(in)  
Outdoor  
Indoor  
Outdoor  
Liquid  
Gas  
870 x 800 x 320(34.2x31.5x12.6)  
9.5  
kg(lb)  
69  
6.35(1/4)  
Service Valve  
mm(In)  
g(lb)  
9.52(3/8)  
Refrigerant(R-410A)  
1,600(3.5)  
at 7.5m  
Airflow Direction Control(Up & Down)  
Remote Controller Type  
Sleeping Operation  
O
L.C.D Wireless  
O
O
Drain Hose  
12 Multi type Air Conditioner  
Product Specifications  
DMH24DB-1  
Operation  
Unit  
Remarks  
1-Unit On  
2-Unit On  
Item  
23,600/24,000  
23,600/24,000  
2.4(0.085)  
11,800/12,000  
11,800/12,000  
1.2(0.042)  
208/230V  
at 230V  
Cooling Capacity  
Heating Capacity  
Moisture Removal  
Power Source  
Btu/h  
/h(ft3/h)  
1Ø, 208/230V, 60Hz  
ø, V, Hz  
Indoor  
9.4(331.9)  
36/32/29  
3
Air Circulation  
m /min(ft3/min)  
Outdoor  
Indoor  
53  
54  
Noise Level  
( Hi / Med / Low )  
dB(A)  
at 230V  
Outdoor  
Cooling  
2,390/2,390  
1,420/1,420  
1,620/1,620  
6.3/6.3  
Input  
W
A
Heating  
Cooling  
Heating  
Cooling  
Heating  
2,440/2,440  
10.1/10.1  
9.8/9.8  
Runnig  
Current  
E.E.R.  
C.O.P.  
208/230V  
7.2/7.2  
.
Btu/h w  
9.9/10.1  
8.3/8.5  
-
2.83/2.88  
2.13/2.17  
Indoor  
895 x 282 x 165(35.2x11.1x6.5)  
Dimensions(W x H x D)  
Net. Weight  
mm(in)  
Outdoor  
Indoor  
Outdoor  
Liquid  
Gas  
870 x 800 x 320(34.2x31.5x12.6)  
9.5  
kg(lb)  
69  
6.35(1/4)  
Service Valve  
mm(In)  
g(lb)  
9.52(3/8)  
Refrigerant(R-410A)  
1,600(3.5)  
at 7.5m  
Airflow Direction Control(Up & Down)  
Remote Controller Type  
Sleeping Operation  
O
L.C.D Wireless  
O
O
Drain Hose  
Service Manual 13  
Installation  
Installation  
Read carefully, and then follow step by step.  
Installation Parts  
Installation plate  
Type "A" screw and plastic anchor  
Remote Control Holder  
Type "B" screw  
Installation Tools  
Figure  
Name  
Figure  
Name  
Screw driver  
Electric Drill  
Ohmmeter  
Hexagonal wrench  
Measuring Tape, Knife  
Hole Core Drill  
Ammeter  
Gas Leak Detector  
Thermometer,  
Level  
Spanner  
Torque wrench  
Flaring Tool Set  
14 Multi type Air Conditioner  
Installation  
Select the best location  
Indoor unit  
1. Do not have any heat or steam near the unit.  
More than 5cm  
(2.0 inch)  
2. Select a place where there are no obstacles in front  
of the unit.  
More than 5cm  
(2.0 inch)  
3. Make sure that condensation drainage can be conve-  
niently routed away.  
More than 2.3m  
(90.6 inch)  
4. Do not install near a doorway.  
5. Ensure the spaces indicated by arrows from the wall,  
ceiling, fence or other obstacles.  
More than 5cm  
(2.0 inch)  
6. Use a stud finder to locate studs to prevent unneces-  
sary damage to the wall.  
CAUTION: Install the indoor unit  
on the wall where the height from  
the floors more than 2.3m(7.5ft).  
Outdoor unit  
1. If an awning is built over the unit to prevent direct  
sunlight or rain exposure, make sure that heat radia-  
tion from the condenser is not restricted.  
more than 20cm  
(7.9 inch)  
2. Ensure that the spaces indicated by arrows around  
front, back and side of the unit.  
more than 20cm  
(7.9 inch)  
3. Do not place animals and plants in the path of the  
warm air.  
4. Take the air conditioner weight into account and  
select a place where noise and vibration are mini-  
mum.  
more than 70cm  
(27.6 inch)  
5. Select a place so that the warm air and sound from  
the air conditioner do not disturb neighbors.  
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.  
Service Manual 15  
Installation  
Piping length and elevation  
Multi Piping Type  
Max Elevation  
between each  
indoor unit and out-  
door unit (h1)  
Max elevation  
between indoor  
units (h2)  
Max total length of Max length of each Min length of each  
Capacity(Btu/h)  
24k  
all pipes (A+B)  
pipe (A/B)  
pipe (A/B)  
3m(10ft)  
Pipe Size  
30m(100ft)  
15m(50ft)  
7.5m(25ft)  
7.5m(25ft)  
Indoor Capacity  
(Btu/h)  
Gas  
3/8"  
Liquid  
Standard Length  
Additional Refrigerant  
20g/m(0.32oz/ft)  
12K  
1/4"  
7.5m(25ft)  
24k  
A
B
h1  
h1  
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 (16.4~23.0ft).  
16 Multi type Air Conditioner  
Installation  
Fixing Installation Plate(Standard Type)  
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. Drilling the hole through the  
wall for piping connections must be done safely.  
Installation plate  
B
Distance (mm)  
CHASSIS  
D
(Grade)  
A
B
C
D
A
C
Ø70mm  
Ø70mm  
Left rear piping  
Right rear piping  
SE  
65  
110  
85  
110  
Service Manual 17  
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 correct flaring work in the following procedure.  
Cut the pipes and the cable.  
1. Use the piping kit accessory or the pipes purchased locally.  
2. Measure the distance between the indoor and the outdoor  
unit.  
Copper  
pipe  
Slanted Uneven Rough  
90°  
3. Cut the pipes a little longer than measured distance.  
4. Cut the cable 1.5m (5.0ft) longer than the pipe length.  
Burrs removal  
1. Completely remove all burrs from the cut cross section of  
pipe/tube.  
Pipe  
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.  
Reamer  
Point down  
Putting nut on  
Remove flare nuts attached to indoor and outdoor unit, then  
put them on pipe/tube having completed burr removal.  
(not possible to put them on after flaring work)  
Flare nut  
Copper tube  
Flaring work  
Carry out flaring work using flaring tool as shown below.  
Firmly hold copper pipe in a die in the dimension shown in the  
table above.  
Outside diameter  
A
Handle  
Yoke  
mm  
Ø6.35  
Ø9.52  
inch  
1/4  
mm  
0~0.5  
0~0.5  
Bar  
Bar  
3/8  
Cone  
Copper pipe  
Clamp handle  
Red arrow mark  
18 Multi type Air Conditioner  
Flaring Work and Connection of Piping  
Check  
1. Compare the flared work with the figure by.  
Smooth all round  
Inside is shiny without scratches  
2. If a flared section is defective, cut it off and do flaring work  
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 by)  
and pull the tubing and drain hose away from chassis.  
3. Replace only the plastic tubing holder 1, not the holder 2 in  
the original position.  
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 out-  
door unit through the piping hole.  
Do not connect the cable to the indoor unit.  
Make a small loop with the cable for easy connection later.  
3. Tape the tubing, drain hose, and the connecting cable. Be  
sure that the drain hose is located at the lowest side of the  
bundle. Locating at the uper side can cause drain pan to  
overflow inside the unit.  
Drain hose  
If the drain hose is routed inside the room, insulate the hose  
with an insulation material* so that dripping from "sweat-  
ing"(condensation) will not damage furniture or floors.  
*Foamed polyethylene or equivalent is recommended.  
Tape  
Connecting  
pipe  
Drain hose  
Connecting cable  
Service Manual 19  
Flaring Work and Connection of Piping  
4. Indoor unit installation  
Hook the indoor unit onto the upper portion of the installa-  
tion 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 installa-  
tion 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.  
Outside diameter  
Torque  
Open-end wrench (fixed)  
.
mm  
Ø6.35  
Ø9.52  
inch  
1/4  
kg m  
lbf.in  
156.2  
364.5  
1.8  
4.2  
Flare nut  
3/8  
Wrench  
Connection pipe  
3. When extending the drain hose at the indoor unit, install  
the drain pipe.  
Indoor unit tubing  
Drain pipe  
Indoor unit drain hose  
Vinyl tape(narrow)  
Wrap the insulation material around the connecting por-  
tion.  
Adhesive  
1. Overlap the connection pipe insulation material and the  
indoor unit pipe insulation material. Bind them together  
with vinyl tape so that there may be no gap.  
Plastic bands  
Insulation material  
2. Wrap the area which accommodates the rear piping hous-  
ing section with vinyl tape.  
Indoor unit pipe  
Wrap with vinyl tape  
Connection pipe  
Vinyl tape (wide)  
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.  
Connecting cable  
Pipe  
Vinyl tape(narrow)  
Wrap with vinyl tape  
Pipe  
Vinyl tape(wide)  
Drain hose  
20 Multi type Air Conditioner  
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.  
1
2
2. Insert the piping, drain hose, and the connecting cable into  
the piping hole.  
Connecting  
cable  
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.  
Insert the spacer etc. between the indoor unit and the  
installation plate and separate the bottom of the indoor  
unit from the wall.  
Indoor unit  
Spacer  
Installation plate  
8cm  
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.  
Outside diameter  
Torque  
.
mm  
Ø6.35  
Ø9.52  
inch  
1/4  
3/8  
kg m  
lbf.in  
156.2  
364.5  
1.8  
4.2  
Open-end wrench (fixed)  
Flare nut  
Wrench  
Connection pipe  
3. When extending the drain hose at the indoor unit, install  
the drain pipe.  
Indoor unit tubing  
Drain hose  
Indoor unit drain hose  
Vinyl tape (narrow)  
Adhesive  
Service Manual 21  
Flaring Work and Connection of Piping  
Wrap the insulation material around the connecting por-  
tion.  
Plastic bands  
Insulation material  
1. Overlap the connection pipe heat insulation and the indoor  
unit pipe heat insulation material. Bind them together with  
vinyl tape so that there may be no gap.  
2. Wrap the area which accommodates the rear piping hous-  
ing section with vinyl tape.  
Indoor  
unit piping  
Connection  
pipe  
Vinyl tape  
(wide)  
Wrap with vinyl tape  
Pipe  
Vinyl tape(narrow)  
Connecting cable  
3. Bundle the piping and drain hose together by wrapping  
them with cloth tape over the range within which they fit  
into the rear piping housing section.  
Pipe  
Drain hose  
Vinyl tape(narrow)  
Wrap with  
vinyl tape(wide)  
Reroute the pipings and the drain hose across the back  
of the chassis.  
Indoor unit installation  
1. Remove the spacer.  
Piping for  
passage through  
piping hole  
2. Ensure that the hooks are properly seated on the installa-  
tion plate by moving it left and right.  
3. Press the lower left and right sides of the unit against the  
installation plate until the hooks engage into their  
slots(clicking sound).  
Connecting  
cable  
Drain hose  
22 Multi type Air Conditioner  
Flaring Work and Connection of Piping  
REMOTE CONTROL PREPARATION(OPTIONAL)  
HOW TO MOUNT ONTO A WALL  
HOW TO INSERT BATTERIES  
Remove the battery cover from the remote con-  
troller.  
Slide the cover according to the arrow direction.  
Do not use rechargeable batteries,  
such batteries differ from standard dry  
cells in shape, dimensions, and per-  
formance.  
Romove the batteries from the remote  
controller if the air conditioner is not  
going to be used for some long time.  
Insert the two batteries.  
Be sure that the (+) and (-) directions are correct.  
Be sure that both batteries are new.  
Re-attach the cover.  
Slide it back into position.  
Service Manual 23  
Flaring Work and Connection of Piping  
Outdoor  
Align the center of the pipings and sufficiently tighten the flare  
nut by hand.  
Finally, tighten the flare nut with torque wrench until the  
wrench clicks.  
Outdoor unit  
When tightening the flare nut with torque wrench, ensure  
the direction for tightening follows the arrow on the wrench.  
Outside diameter  
Torque  
A-UNIT  
Gas side piping  
.
mm  
Ø6.35  
Ø9.52  
inch  
1/4  
kg m  
lbf.in  
156.2  
364.5  
1.8  
4.2  
B-UNIT  
Liquid side piping  
3/8  
Torque wrench  
24 Multi type Air Conditioner  
Flaring Work and Connection of Piping  
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 earth wire should be longer than the common wires.  
The circuit diagram is not 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.  
WARNING:  
• The circuit diagram is not subject to change without notice.  
• Be sure to connect wires according to the wiring diagram.  
• Connect the wires firmly, so that not to be pulled out easily.  
• Connect the wires according to color codes by referring to the wiring diagram.  
WARNING: Provide a circuit breaker  
Main power source  
between power source and the outdoor  
unit as shown below.  
Air  
Circuit Breaker  
Conditioner  
Use a circuit breaker  
or time delay fuse.  
WARNING: The power cord connected to the outdoor unit should be complied with the following speci-  
fications (ETL recognized and CSA certified).  
Wire gauge per  
MCA on unit name plate  
Line voltage (208~230V)  
and local and national code.  
The power connecting cable connected to the indoor and outdoor unit should be complied with the fol-  
lowing specifications (ETL recognized and CSA certified).  
AWG18  
Low voltage (below 40V)  
WARNING: When using the separate wire as the power cord, please fix the separate wire into the con-  
trol box panel by using tie wrap as the fixture.  
Service Manual 25  
Connecting the Cable between Indoor Unit and Outdoor Unit  
Connect the cable to the Outdoor unit.  
1. Remove the cover control from the unit by loosening the  
screw.  
Outdoor unit  
Connect the wires to the terminals on the control board  
individually as the following.  
Terminal block  
Over 5mm  
2. Secure the cable onto the control board with the holder  
(clamper).  
Holder for  
power supply  
cord  
3. Refix the cover control to the original position with the  
screw.  
Power supply  
cable  
24k Outdoor side  
A-UNIT  
B-UNIT  
1
2
3
4
1
2
3
4
Cover control  
Connecting  
cable  
Connecting cable(Low voltage)  
L
N
1
2
3
4
1
2
3
4
Terminal BLOCK  
Terminal BLOCK  
Power Source  
208/230V AC  
(High voltage)  
Indoor A-UNIT  
Indoor B-UNIT  
NOTICE  
:
1. Separately wire the high and low voltage line.  
2. Use heat-proof electrical wiring capable of withstanding temperature up to 75°C(167°F).  
3. Use outdoor and waterproof connection cable rated more than 300V for the connection between indoor and outdoor unit.  
(For example, Type SJOW)  
WARNING:  
Be sure to comply with local 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.  
26 Multi type Air Conditioner  
Connecting the Cable between Indoor Unit and Outdoor Unit  
Connection method of the connecting cable(Example)  
(1) Remove two-caps on the conduit panel.  
(2) Make a hole appropriate for the passage of connection cable  
through on cap by tool.  
(for low voltage line)  
Terminal  
block  
(3) Pass the connecting cable through the hole.  
(4) Properly connect the cable on the terminal block.  
(5) Fix the connection cable with cord clamp provided on the unit  
not to have strain at the terminal when the connection cable is  
pulled outside up to a 35 pound weight.  
(6) Wind the vinyl tape round the connecting cable for sealing  
between the surface of the connection cable and cap.  
(7)Finally, Fix the cap to the conduit panel.  
Cord clamp  
Cap(Reuse)  
G
Lock nut  
Hole  
(for low voltage line)  
Cap(Remove)  
Taping  
WARNING: Loose wiring may cause the termi-  
nal to overheat or result in unit malfunction. A  
fire hazard may also exist. Therefore, be sure  
all wiring is tightly connected.  
(for sealing)  
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 with the fixing screw of the terminal plate.  
High voltage  
Strand wire  
How to connect wiring to the terminals  
For strand wiring  
Round  
terminal  
(1) Cut the wire end with a wire cutter or wire-cutting pliers,  
then strip the insulation to expose the strand wiring about  
10mm(3/8").  
(2) Using a screwdriver, remove the terminal screw(s) on the  
terminal plate.  
(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 and tighten  
the terminal screw using a screwdriver.  
Low voltage  
Loosening the  
terminal block  
screw  
Fastening the  
wire tightly  
Connecting cable  
Service Manual 27  
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  
Air  
Fuse or breaker  
Model  
24k  
Power source  
Circuit Breaker  
Use a circuit  
breaker or time  
delay fuse.  
Conditioner  
Capacity  
Per max. fuse size  
on unit name plate  
1Ø, 230/208V  
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 respec-  
tively.  
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 will be back into  
place.  
28 Multi type Air Conditioner  
Checking the Drainage, Forming the Pipings and Long Pipe Setting  
Checking the Drainage, Forming the Pipings and Long Pipe Setting  
Checking the drainage  
To check the drainage.  
1. Pour a glass of water on the evaporator.  
2. Ensure the water flows through the drain hose of the  
indoor unit without any leakage and goes out the drain exit.  
Drain piping  
1. The drain hose should point downward for easy drain flow.  
Downward slope  
2. Do not make drain piping.  
Accumulated  
drain water  
Do not raise  
Less than  
50mm gap  
Tip of drain hose  
dipped in water  
Air  
Water  
leakage  
Water  
leakage  
Water  
leakage  
Waving  
Ditch  
Service Manual 29  
Checking the Drainage, Forming the Pipings and Long Pipe Setting  
Forming the piping  
Form the piping by wrapping the con-  
necting portion of the indoor unit with  
insulation material and secure it with  
two kinds of vinyl tape.  
Seal a small  
opening around  
the pipings with  
gum type sealer.  
Taping  
Drain hose  
If you want to connect an additional drain hose, the end  
of the drain outlet should be routed above the ground.  
Secure the drain hose appropriately.  
Plastic  
band  
Pipings  
Connecting  
cable  
In cases where the outdoor unit is  
installed below the indoor unit perform  
the following.  
1. Tape the piping, drain hose and connecting cable from  
Power supply  
cord  
down to up.  
2. Secure the tapped piping along the exterior wall using  
Trap is required to prevent water from entering  
into electrical parts.  
saddle or equivalent.  
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.  
2. Secure the taped piping along the exterior wall. Form a  
trap to prevent water entering the room.  
Seal a small opening  
around the pipings  
with gum type sealer.  
Trap  
3. Fix the piping onto the wall by saddle or equivalent.  
Trap  
30 Multi type Air Conditioner  
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 leak tight, and vacuumed to remove incondensi-  
ble gas and moisture in the system.  
Checking method  
1. Do a leakage test of all joints of the tubing(both indoor and  
outdoor) and both gas and liquid side service valves.  
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 ser-  
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.  
vice valve caps from both the gas and the liquid side on the out-  
door unit. Check that both the liquid and the gas side service  
valves on the outdoor unit are kept closed at this stage.  
Leakage test  
Connect the manifold valve(with pressure gauges) and dry nitro-  
gen gas cylinder to this service port with charge hoses.  
CAUTION: Be sure to use a manifold  
valve for leak testing.  
Indoor unit  
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.  
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.  
Manifold valve  
Pressure  
Lo  
Hi  
gauge  
Charge hose  
NOTICE  
:
Leakage test shoud be done for each indoor  
unit connection set, separately.  
Nitrogen gas  
cylinder(in vertical  
standing position)  
Service Manual 31  
Checking the Drainage, Forming the Pipings and Long Pipe Setting  
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. The following table shows the  
time required for evacuation.  
Outdoor unit  
Required time for evacuation when 4 CFM vacuum  
pump is used  
If tubing length is longer  
than 10m (33 ft)  
If tubing length is less  
than 10m (33 ft)  
10 min. or more  
15 min. or more  
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  
2. Turn the valve stem of gas side valve counter-clockwise to  
fully open the valve.  
Pressure  
gauge  
Lo  
Hi  
3. Loosen the charge hose connected to the gas side service  
port slightly to release the pressure, then remove the hose.  
4. Replace the flare nut and its bonnet on the gas side ser-  
vice port and fasten the flare nut securely with an  
adjustable wrench. This process is very important to pre-  
vent leakage from the system.  
Open  
Close  
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.  
Vacuum pump  
NOTICE  
: Repeat evacuation procedure for each indoor  
unit.  
32 Multi type Air Conditioner  
Charging  
Charging  
Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a 7.5m(25ft) line set for each indoor  
line.  
Any time total line set is used either shorter or longer then the nominal 22.5m(75ft: for tri-zone) line set length the refrigerant  
charge has to be adjusted.  
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 20g(0.22oz) of R-410A per meter(foot).  
Max Elevation  
between each indoor  
each pipe (A/B) each pipe (A/B) unit and outdoor unit  
(h1)  
Max total length  
of all pipes  
(A+B)  
Max elevation  
between indoor  
units (h2)  
Additional  
Refrigerant  
Max length of  
Min length of  
Capacity (Btu/h)  
24k  
30m(100ft)  
15m(50ft)  
3m(10ft)  
7.5m(25ft)  
7.5m(25ft)  
20g/m(0.22oz/ft)  
Example: A 80ft line set is used for dual - zone 5 additional ft X 0.22 ounces per foot= add 1.1 ounces of R-410A  
Important:  
If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge using the unit nameplate charge  
adjusting for line sets longer or shorter than 7.5m(25ft) for each indoor unit. Unit is critically charged.  
Service Manual 33  
Test Running  
Test Running  
Split Type  
1. Check that all tubing and wiring have been properly con-  
Bolt  
nected.  
2. Check that the gas and liquid side service valves are  
fully open.  
1) Prepare remote controller  
Remove the battery cover by pulling it according to  
the arrow direction.  
Insert new batteries making sure that the (+) and ()  
Tubing connection  
of battery are installed correctly.  
Reattach the cover by pushing it back into position.  
4) Evaluation of the performance  
Operate unit for 15~20 minutes, then check the system  
refrigerant charge:  
1. Measure the pressure of the gas side service valve.  
2. Measure the temperature of the intake and discharge of  
air.  
3. Ensure the difference between the intake temperature  
and the discharge is more than 8°C(14.4°F) (Cooling) or  
reversely (Heating).  
Outside ambient  
TEMP.  
The pressure of the gas side  
service valve.  
Refrigerant  
R-410A  
NOTE:  
Use 2 AAA(1.5volt) batteries. Do not use rechargeable  
batteries.  
Remove the batteries from the remote controller if the sys-  
tem is not going to be used for a long time.  
35°C (95°F) 8.5~9.5kg/cm2G(120~135 P.S.I.G.)  
2) Precautions in test run  
Intake temperature  
The initial power supply must provide at least 90% of  
the rated voltage.  
Otherwise, the air conditioner should not be operated.  
Discharge air  
For test run, carry out the cooling operation firstly  
even during heating season. If heating operation is  
carried out firstly, it leads to the trouble of compres-  
sor. Then attention must be paid.  
Carry out the test run more than 5 minutes without  
fail. (Test run will be cancelled 18 minutes later auto-  
matically)  
Discharge  
temperature  
The test run is started by pressing timer cancel button  
five times continuously. (Room type)  
To cancel the test run, press any button.  
3) Settlement of outdoor unit  
Anchor the outdoor unit with a bolt and nut(ø10mm)  
tightly and horizontally on a concrete or rigid mount.  
When installing on the wall, roof or rooftop, anchor the  
mounting base securely with a nail or wire assuming the  
influence of wind and earthquake.  
In the case when the vibration of the unit is conveyed to  
the hose, secure the unit with an anti-vibration rubber.  
34 Multi type Air Conditioner  
Operation  
Operation  
Function of control  
1. MAIN UNIT FUNCTION  
DISPLAY  
Operation Indicator  
On while in appliance operation, off while in appliance pause  
Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on)  
Sleep Timer Indicator  
On while in sleep timer mode, off when sleep timer cancel or appliance operation pause  
Timer Indicator  
On while in timer mode (on/off), off when timer mode is completed or canceled  
Defrost Indicator  
Off except when hot start during heating mode operation or while in defrost control  
Cooling Mode Operation  
When the intake air temperature reaches 0.5°C(0.9°F) below the setting temp, the compressor and the outdoor  
fan stop.  
When it reaches 0.5°C(0.9°F) above the setting temp, they start to operate again.  
Compressor ON Temp  
Compressor OFF Temp  
Setting Temp+0.5°C(0.9°F)  
Setting Temp-0.5°C(0.9°F)  
While in compressor running, operating with the airflow speed set by the remote control. While compressor is  
off fan operates at low speed regardless of the setting.  
Soft Dry Operation Mode  
When the dehumidification operation input by the remote control is received, the intake air temperature is  
detected and the setting temp is automatically set according to the intake air temperature.  
26°C(78.8°F) Intake Air Temp  
■■ 25°C(77°F)  
24°C(75.2°F) Intake Intake Air Temp<26°C(78.8°F)  
18°C(64.4°F) Intake Intake Air Temp<24°C(75.2°F)  
Intake Air Temp<18°C(64.4°F)  
■■ Intake Air Temp-1°C(30.2°F)  
■■ Intake Air Temp-0.5°C(31.1°F)  
■■ 18°C(64.4°F)  
While compressor off, the indoor fan repeats low airflow speed and stop.  
While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification  
operation and 4-min compressor off repeat.  
Compressor ON Temp.  
Setting Temp+0.5°C(0.9°F)  
Compressor OFF Temp. Setting Temp-0.5°C(0.9°F)  
In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.  
Heating Mode Operation  
When the intake air temp reaches +3°(37.4°F)above the setting temp, the compressor is turned off. When  
below the setting temp, the compressor is turned on.  
Compressor ON Temp.  
Setting Temp.  
Compressor OFF Temp. Setting Temp.+3°C(37.4°F)  
While compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C(68°F), when above  
27°C(80.6°F) , it operates with the low or setting speed. When the indoor pipe temp is between 20°C(68°F) and  
Service Manual 35  

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