12
11
All the electrical connections must be carried out by qualified installers and all the wirings must be
connected according to the wiring diagram.
Make ground connection prior to any other electrical connections.
All power sources must be turned off before wiring work and do not turn on the power until you have made
sure all the wirings have been safety checked.
A main switch and circuit breaker or fuse must be installed, the capacity should be above 1.5 times of
maximum current in circuit.
An individual branch circuit and single socket used only for this appliance must be available.
Wire cross section is depending on the rated current and national, state and local electrical wiring code.
Consult local building codes and National electrical code for special requirement.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly
qualified persons in order to avoid a hazard.
The unit must be connected to the main power supply by means of a circuit breaker or a switch with a
contact separation of at least 3mm in all poles. Installation of a residual current device (RCD) having a rated
residual operating current not exceeding 30mA is advisable.
This appliance incorporates an earth connection for functional purposes only.
CAUTION
After the piping work is finished, make sure to check the connection part of each refrigerant pipe and confirm that there is no gas leak by
applying soapy water to them or by using a leak detector specific for HFC refrigerants. Refer below picture for illustration.
A: Low pressure stop valve B: High pressure stop valve
C& D: Indoor unit flare nuts
Check-point of indoor unit
Check-point of outdoor unit
A
B
C
D
4.3 REFRIGERANT PIPE
4.4 AIR EVACUATION
Connect the charge hose from the manifold gauge to the service port of the gas side packed valve.
Connect the charge hose to the port of the vacuum pump.
Fully open the handle Loof manifold gauge.
Operate the vacuum pump to evacuate air from the system until -76cmHg.
Close the handle Loof manifold gauge.
Fully open the valve stem of the packed valves.
Remove the charging hose form the service port.
Securely tighten caps of packed valve.
-76 cmHg
Handle Lo
Handle Hi
Charge hose
Charge hose
Vacuum pump
Packed valve
Manifold valve
Compound gauge
Pressure meter
4.5 LEAKAGE TEST
* Please use tools for R410A system.
Liquid side:
φ
9.52mm
R410A*
Chargeless length
5m
Additional charge per meter
Liquid side:
φ
6.35mm
15g
30g
Minimum length
to reduce abnormal
vibration & noise
3m
NOTICE:
1. All power wires must be sized in according with national,state and local electrical wiring code. Consult local building codes and National Electrical Code for special
requirements.
2. The outdoor power cord and interconnecting cable type should be H07RN-F.
3. The rated current of appliance is indicated on the nameplate.
60mm
40mm
10mm
Power input cord
GND
60mm
40mm
10mm
GND
Connective Cable
38QHM009/38QHM012
38QHM018
38QHM024
11.0
16.0
18.5
17
25
30
Model
Rated Current(A)
Fuse Rating(A)
Power input cord
Connective Cable
3*1.5mm
3*1.5mm
3*2.5mm
5*1.5mm
5*1.5mm
5*2.5mm
(with Min. Crosse section)
(with Min. Crosse section)
4. REFRIGERANT PIPING WORK
5. WIRING
* Please use tools for R410A system.
Max. height difference(m)
Models
25
R410A Inverter
Max. pipe length(m)
10
30
20
40
20
QHM009/QHM012
QHM018
QHM024
NOTE
Extended pipe length will affect the capacity and energy efficiency of the unit.
The nominal efficiency is tested based on the pipe length of 5 meter.
When the pipe length is over 5m, the additional refrigerant should be added according to the pipe length.
The max. pipe length is recommended as below.
W
1
2
3
L
N
Power Input
To Indoor
W
1
2
3
L
N
Power Input
To Indoor
W
1
2
3
To outdoor
W
1
2
3
To outdoor
QHM009
QHM012
QHM018
QHM024
Outdoor Unit
Indoor Unit
Model
