EDUS04-904
Installation Manual
Room Air Conditioners H-Series
49
Outdoor Unit Installation (2)
*1. Pipe length vs. vacuum pump run time
*2. If the vacuum pressure gauge pointer swings back, refrigerant may have water content or a loose pipe
joint may exists. Check all pipe joints and retighten nuts as needed, then repeat steps 2) through 4).
• If adding additional refrigerant, perform air purging from the
refrigerant pipes and indoor unit using a vacuum pump before
charging additional refrigerant.
• Use a hexagonal wrench (3/16”) to operate the stop valve rod.
• All refrigerant pipe joints should be tightened with a torque
wrench to the specified tightening torque.
5.
Purging Air and Checking for Gas Leakage
• When the piping work is completed, it is necessary to purge the air and check for gas leakage.
1) Connect projection side of charging hose (which comes from gauge manifold) to gas stop valve’s service port.
2) Fully open gauge manifold’s low-pressure valve (Lo) and completely close its high-pressure valve (Hi).
(High-pressure valve subsequently requires no operation.)
3) Do vacuum pumping and make sure that the vacuum pressure gauge reads – 29.9 inHg *1.
4) Close gauge manifold’s low-pressure valve (Lo) and stop vacuum pump.
(Keep this state for a few minutes to make sure that the vacuum pressure gauge pointer does not swing back.)*2.
5) Remove valve caps from liquid stop valve and gas stop valve.
6) Turn the liquid stop valve’s rod 90 degrees counterclockwise with a hexagonal wrench to open valve.
Close it after 5 seconds, and check for gas leakage.
Using soapy water, check for gas leakage from indoor unit’s flare and outdoor unit’s flare and valve rods.
After the check is complete, wipe all soapy water off.
7) Disconnect charging hose from gas stop valve’s service port, then fully open liquid and gas stop valves.
(Do not attempt to turn valve rod beyond its stop.)
8) Tighten valve caps and service port caps for the liquid and gas stop valves with a torque wrench at the specified torques.
1) Do not place any substance other than the specified refrigerant (R410A) into the refrigeration cycle.
2) When a refrigerant gas leak occurs, ventilate the room as soon and as much as possible.
3) R410A, as well as other refrigerants, should always be recovered and never be released directly into
the environment.
4) Use a vacuum pump for R410A exclusively. Using the same vacuum pump for different refrigerants
may damage the vacuum pump or the unit.
WARNING
Pipe length
Up to 50 feet
More than 50 feet
Run time
Not less than 10 min.
Not less than 15 min.
Compound
pressure gauge
Pressure
meter
High-
pressure
valve
Low-pressure
valve
Vacuum pump
Service port
Liquid
stop
valve
Valve caps
Gas stop valve
Charging
hoses
Gauge
manifold
Summary of Contents for H-Series
Page 1: ...EDUS 04 904 H Series Heat Pump SEER 13 Models ...
Page 63: ...Operation Manual EDUS04 904 62 Room Air Conditioners H Series 12 2 09 12 Class ...
Page 64: ...EDUS04 904 Operation Manual Room Air Conditioners H Series 63 Ground terminal ...
Page 65: ...Operation Manual EDUS04 904 64 Room Air Conditioners H Series ...
Page 66: ...EDUS04 904 Operation Manual Room Air Conditioners H Series 65 ...
Page 67: ...Operation Manual EDUS04 904 66 Room Air Conditioners H Series ...
Page 68: ...EDUS04 904 Operation Manual Room Air Conditioners H Series 67 ...
Page 69: ...Operation Manual EDUS04 904 68 Room Air Conditioners H Series ...
Page 70: ...EDUS04 904 Operation Manual Room Air Conditioners H Series 69 ...
Page 72: ...EDUS04 904 Operation Manual Room Air Conditioners H Series 71 ...
Page 73: ...Operation Manual EDUS04 904 72 Room Air Conditioners H Series operation center ...
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Page 85: ...Operation Manual EDUS04 904 84 Room Air Conditioners H Series fin fin fin ...
Page 87: ...Operation Manual EDUS04 904 86 Room Air Conditioners H Series 3P232717 1 ...
Page 88: ...EDUS04 904 Operation Manual Room Air Conditioners H Series 87 12 3 15 18 24 Class Fins For ...
Page 89: ...Operation Manual EDUS04 904 88 Room Air Conditioners H Series Ground terminal ...
Page 90: ...EDUS04 904 Operation Manual Room Air Conditioners H Series 89 ...
Page 91: ...Operation Manual EDUS04 904 90 Room Air Conditioners H Series INTELLIGENT EYE operation ...
Page 92: ...EDUS04 904 Operation Manual Room Air Conditioners H Series 91 ...
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Page 99: ...Operation Manual EDUS04 904 98 Room Air Conditioners H Series operation COMFORT AIRFLOW ...
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Page 109: ...Operation Manual EDUS04 904 108 Room Air Conditioners H Series odor ...
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Page 112: ...EDUS04 904 Operation Manual Room Air Conditioners H Series 111 ground neighboring ...
Page 113: ...Operation Manual EDUS04 904 112 Room Air Conditioners H Series cancels C 3P232717 2 ...
Page 123: ...Optional Accessories EDUS04 904 122 Room Air Conditioners H Series ...