Installation Manual

Connecting the Cables
Indoor unit
Connect the cable to the indoor unit by con-
necting the wires to the terminals on the con-
trol 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.)
Insert the connecting cable through the bot-
tom side of indoor unit and connect the cable.
(1) Open the Decor.
(2) Unscrew the screw of C/Box.
(3) Slide up the Metal Plate Cover.
(4) Connect the connecting cable.
(5) After complete connecting the cables,
should assemble the Metal Plate Cover by
screw.
* The feature can be changed according a
type of model.
Decor
Power
connecting cable
Power
connecting cable
1(L1) 2(L2) 3
CAUTION
- The circuit diagram is a subject to
change without notice.
- The earth wire should be longer than the
common wires.
- When installing, refer to the circuit
diagram on the chassis cover.
- Connect the wires firmly so that they
may not be pulled out easily.
- Connect the wires according to color
codes, referring to the wiring diagram.
Circuit Breaker
Between the power and the appliance, install a
certified circuit breaker. The interrupting device
should be equipped to properly block all power
sources.
Air
Conditioner
Main Power Source
Circuit
Breaker
Circuit Breaker
Capacity (kBtu/h)
18 / 24 18 / 24
15 A 30 A
NOTE
• Check whether the current capacity of the
selected cable and wiring exceeds the
rated capacity of the recommended circuit
breaker.
Connecting the Wires
• The distance between wires should be more
than 0.2 inches (5 mm).
0.2 (5)
Unit: inch (mm)
• Connect the wire after inserting the circular
terminal.
Circular Terminal
Wire
Air Purging
The 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, after evacuating the system, take a
leak test for the piping and tubing between
the indoor and outdoor unit.
Air purging with vacuum pump
1 Preparation
- Check that each tube(both liquid and gas
side tubes) between the indoor and out-
door 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 side
on the outdoor unit. Note that both the
liquid and the gas side service valves on
the outdoor unit are kept closed at this stage.
- Do a leak 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.
- 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.
* The feature can be changed according
a type of model.
2 Leak test
- Connect the manifold valve(with pressure
gauges) and dry nitrogen gas cylinder to
this service port with charge hoses.
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.
There is a risk of fire and explosion.
- Inert gas (nitrogen) should be
used when you check plumbing
leaks, cleaning or repairs of pipes etc.
If you are using combustible gases includ-
ing oxygen, product may have the risk of
fires and explosions.
!
Be sure to use a manifold valve for air
purging. If it is not available, use a stop
valve for this purpose. The knob of the
3-way valve must always be kept close.
- Pressurize the system to maximum
250 P.S.I.G. (17.6 kgf/cm
2
G) (R22 model)
or 400 P.S.I.G. (28.1 kgf/cm
2
G) (R410A
model) with dry nitrogen gas and close
the cylinder valve when the gauge
reading reaches 250 P.S.I.G. (17.6
kgf/cm
2
G) (R22 model) or 400 P.S.I.G.
(28.1 kgf/cm
2
G) (R410A model). Next
step is leak test with liquid soap.
It may cause explosion or injury.
- After pump down, power
must be turned off before
removing the pipe. When operating this
product without connecting the pipe,
there will be high pressure inside the
compressor due to the entry of air, possi-
bly causing explosion or injury.
!
CAUTION
Charge hose
Nitrogen gas
cylinder(in vertical
standing position)
Indoor unit
Outdoor unit
Lo Hi
Manifold valve
Pressure
gauge
CAUTION
- Remove the caps from the 2-way and 3-way
valves.
- Remove the service-port cap from the 3-way
valve.
- Apply a soap water or a liquid neutral deter-
gent on the indoor unit connection or out-
door unit connections by a soft brush to
check for leakage of the connecting points of
the piping.
- If bubbles come out, the pipes have leakage
Soap water method
Test Running
- Check that all tubing and wiring are properly
connected.
- Check that the gas and liquid side service
valves are fully open.
- If you press and hold the On/Off button for
3 – 5 seconds instead of 6 seconds, the unit
will switch to the test operation.
- In the test operation, the unit blows out
strong air for cooling for 18 minutes and then
returns to the factory default settings.
Test operation
NOTE
If the actual pressure is higher than
shown, the system is most likely over-
charged, and charge should be removed.
If the actual pressure are lower than
shown, the system is most likely under-
charged, and charge should be added.
Operation ranges
The table below indicates the temperature ranges the air conditioner can be Operated within.
* With wind baffle installed, the minimum temperature will be 0 °F D.B. in cooling.
Check test items
Mode Indoor temperature Outdoor temperature
Cooling 64 ~ 90 °F 14 [0*] ~ 118 °F
Heating 61 ~ 86 °F -4 ~ 75 °F
Test Items Check
1 Indoor unit is hooked to the installation plate properly.
2 The gas and liquid service valves are fully opened.
3 There is no refrigerant gas leakage.
4 System is properly grounded.(No electrical leakage)
5 The connection cable is clamped firmly.
6 Indoor unit receives remote control commands and operates properly.
7 Cooling/Heating operation is normal.
8 There is no abnormal sound.
9 There is no water leakage.
Precautions about installation in regions with
extreme snowfall and cold temperatures
To ensure the outdoor unit operates properly, certain measures are required in locations where there
is a possibility of heavy snowfall or severe wind chill or cold :
1 Prepare for severe winter wind chills and heavy snowfall, even in areas of the country where these
are unusual phenomena.
2 Position the outdoor unit so that its airflow fans are not buried by direct, heavy snowfall.
If snow piles up and blocks the airflow, the system may malfunction.
3 Remove any snow that has accumulated 4 in or more on the top of the outdoor unit.
4 Place the outdoor unit on a raised platform at least 20 in higher than the aver- age annual snowfall
for the area. If the frame width is wider than the outdoor unit, snow may accumulate.
5 Install a snow protection hood.
6 To prevent snow and heavy rain from entering the outdoor unit, install the suction and dis- charge
ducts facing away from direct winds.
7 Additionally, the following conditions should be taken into consideration when the unit operates in
defrost mode:
- If the outdoor unit is installed in a highly humid environment (near an ocean, lake, etc.), en- sure
that the site is well-ventilated and has a lot of natural light. (Example: Install on a rooftop.)
2022
CONNECTING THE CABLE INDOOR UNIT