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Pump down process
1. Turn off the Air Conditioner system.
2. Connect the charge hose from the manifold valve to
the service port of the packed valve at gas side.
3. Turn on the Air Conditioner system in cooling
operation more than 10 minutes.
4. Check the operating pressure of the system should
be normal value.
(Ref. with product specification)
5. Release the valve rod cap of both service valves.
6. Use the Hexagon wrench to turning the valve rod of
Liquid side fully close.
(*Make sure no entering air into the system)
7. Continue operate Air Conditioner system until and
the gauge of manifold dropped into the range of
0.5 - 0 kgf/cm
2
8. Use the Hexagon wrench to turning the valve rod of
Gas side fully close.
And turn off the Air Conditioner system immediately
thereafter.
9. Remove the gauge manifold from the service port of
the packed valve.
10. Securely tighten the valve rod cap to the both
service valves.
CAUTION
Should be check the compressor operating condition
while pumping down process. It must not any
abnormal sound, more vibration. It is abnormal
condition appears and must turn off the Air Conditioner
immediately.
Triple Evacuation Method chart
EVACUATE
BREAK VACUUM WITH DRY NITROGEN
WAIT
EVACUATE
BREAK VACUUM WITH DRY NITROGEN
WAIT
EVACUATE
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS DEEP VACCUM)
RELEASE CHARGE INTO SYSTEM
23-EN
Final Tubing Check
IMPORTANT:
Check to be certain factory tubing on both indoor and
outdoor unit has not shifted during shipment. Ensure
tubes are not rubbing against each other or any sheet
metal. Pay close attention to feeder rubes, making sure
wire ties on feeder tubes are secure and tight.
Open service valves
Open or close the valve.
▼
Liquid side
Open the valve with a 0.16" (4 mm) hexagon wrench.
[Hexagonal wrench is required.]
• While the valve is fully opened, after the screwdriver
has reached the stopper, do not apply torque
exceeding 4 ft•lbs (5 N•m). Applying excessive
torque may damage the valve.
Valve handling precautions
• Open the valve stem until it reaches the stop.
It is unnecessary to apply further force.
• Securely tighten the cap with a torque wrench.
• Cap tightening torque
Ø1/4" (6.4 mm)
10 - 13 ft•lbs (14 - 18 N•m)
Valve size
Ø1/2" (12.7 mm) 24 - 31 ft•lbs (33 - 42 N•m)
Charge port
10 - 13 ft•lbs (14 - 18 N•m)
7
Electrical work
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in
personal injury or death.
• The unit cabinet must have an uninterrupted or
unbroken ground to minimize personal injury if an
electrical fault should occur. The ground may consist
of electrical wire or metal conduit when installed in
accordance with existing electrical codes.
• The appliance sahll be installed in accordance with
national wiring regulations.
• Before performing service or maintenance, be sure
main power switch is turned OFF.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in damage
or improper operation.
• Unit failure as a result of operation on improper line
voltage or excessive phase imbalance constitutes
abuse and may cause damage to electrical
components.
• Wrong wiring may cause a burn-out of some
electrical parts.
• Do not damage or scratch the conductive core or
inner insulator of the power and inter-connecting
wires when peeling them.
Valve cover
Field power
supply wires
System
interconnection wires
Conduit
� 12 �
Field wiring
The dashed lines show field wiring.
(System
(Field power
interconnection wires)
supply)
Input
L
L
L
1
1
1
power
L
L
L
2
2
2
208/230V~,
Remote
S
S
60 Hz
controller
circuit breaker
Outdoor unit
Indoor unit
ground
EN
24-EN
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