EDUS041016
Installation Manual
Room Air Conditioners J-Series
43
7
5.
Purging air and checking gas leakage
• When piping work is completed, it is necessary to purge the air and check for gas leakage.
WARNING
• Do not mix any substance other than the specified refrigerant (R410A) into the refrigeration cycle.
• When refrigerant gas leaks occur, ventilate the room as soon and as much as possible.
• R410A, as well as other refrigerants, should always be recovered and never be released directly into the environment.
• Use a vacuum pump for R410A exclusively. Using the same vacuum pump for different refrigerants may damage the vacuum
pump or the unit.
• If using additional refrigerant, perform air purging from the refrigerant pipes and
indoor unit using a vacuum pump, then charge additional refrigerant.
• Use a hexagonal wrench (3/16 inch (4mm)) to operate the stop valve rod.
• All refrigerant pipe joints should be tightened with a torque wrench at the specified
tightening torque.
*1. Pipe length vs. vacuum pump run time.
*2. If the compound 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).
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 compound pressure gauge reads –29.9inHg (–0.1MPa).*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 compound pressure gauge pointer does not swing back.)*2.
5) Remove 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.
Pipe length
Up to 49.2ft (15m)
Run time
Not less than 10 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 J Series
Page 1: ...EDUS041016 J Series Cooling Only Heat Pump SEER 13 Models ...
Page 53: ...Operation Manual EDUS041016 52 Room Air Conditioners J Series 12 2 Operation Instructions ...
Page 54: ...EDUS041016 Operation Manual Room Air Conditioners J Series 53 ...
Page 55: ...Operation Manual EDUS041016 54 Room Air Conditioners J Series ...
Page 56: ...EDUS041016 Operation Manual Room Air Conditioners J Series 55 ...
Page 57: ...Operation Manual EDUS041016 56 Room Air Conditioners J Series ...
Page 58: ...EDUS041016 Operation Manual Room Air Conditioners J Series 57 ...
Page 59: ...Operation Manual EDUS041016 58 Room Air Conditioners J Series ...
Page 60: ...EDUS041016 Operation Manual Room Air Conditioners J Series 59 ...
Page 61: ...Operation Manual EDUS041016 60 Room Air Conditioners J Series ...
Page 62: ...EDUS041016 Operation Manual Room Air Conditioners J Series 61 ...
Page 63: ...Operation Manual EDUS041016 62 Room Air Conditioners J Series ...
Page 64: ...EDUS041016 Operation Manual Room Air Conditioners J Series 63 ...
Page 65: ...Operation Manual EDUS041016 64 Room Air Conditioners J Series ...
Page 66: ...EDUS041016 Operation Manual Room Air Conditioners J Series 65 ...
Page 67: ...Operation Manual EDUS041016 66 Room Air Conditioners J Series ...
Page 68: ...EDUS041016 Operation Manual Room Air Conditioners J Series 67 ...
Page 69: ...Operation Manual EDUS041016 68 Room Air Conditioners J Series ...
Page 70: ...EDUS041016 Operation Manual Room Air Conditioners J Series 69 ...
Page 71: ...Operation Manual EDUS041016 70 Room Air Conditioners J Series ...
Page 72: ...EDUS041016 Operation Manual Room Air Conditioners J Series 71 ...
Page 73: ...Operation Manual EDUS041016 72 Room Air Conditioners J Series ...
Page 74: ...EDUS041016 Operation Manual Room Air Conditioners J Series 73 ...
Page 75: ...Operation Manual EDUS041016 74 Room Air Conditioners J Series ...
Page 76: ...EDUS041016 Operation Manual Room Air Conditioners J Series 75 ...
Page 77: ...Operation Manual EDUS041016 76 Room Air Conditioners J Series 3P253185 2 ...