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6

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

1) Do not mix any substance other than the specified refrigerant (R410A) into the refrigeration cycle.
2) When refrigerant gas leaks occur, 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.

• 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 (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 –0.1MPa (–76cmHg)*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 15 metres

More than 15 metres

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

01_EN_3P192882-1C.fm  Page 6  Tuesday, March 6, 2007  4:53 PM

Содержание RX20E2V1B

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Страница 2: ...RQ EMC97 4957 Daikin TCF 015 74736 KRQ EMC97 4957 Daikin TCF 015 74736 KRQ EMC97 4957 Daikin TCF 015 74736 KRQ EMC97 4957 Daikin TCF 015 74736 KRQ EMC97 4957 Daikin TCF 015 74736 KRQ EMC97 4957 Daikin...

Страница 3: ...y do not put undue force on the electrical covers or panels Install covers over the wires Incomplete cover installation may cause terminal overheating electrical shock or fire If any refrigerant has l...

Страница 4: ...ing on radio wave conditions 8 In coastal areas or other places with salty atmosphere of sulfate gas corrosion may shorten the life of the air conditioner 9 Since drain flows out of the outdoor unit d...

Страница 5: ...t required for refrigerant pipe exceeding 10m in length Be sure to add the proper amount of additional refrigerant Failure to do so may result in reduced perfomance The suggested shortest pipe length...

Страница 6: ...t Installation 1 Installing outdoor unit 1 When installing the outdoor unit refer to Precautions for Selecting the Location and the Outdoor Unit Installation Draw ings 2 If drain work is necessary fol...

Страница 7: ...ches Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and escaping gas 2 To prevent gas leakage apply refrigeration machine oil on both inner and outer surfaces o...

Страница 8: ...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...

Страница 9: ...Gas pipe thermal insulation Liquid pipe thermal insulation O D 9 5mm O D 6 4mm I D 12 15mm I D 8 10mm Thickness 0 8mm Thickness 10mm Min Filling a cylinder with an attached siphon Stand the cylinder...

Страница 10: ...press the operation stop button CAUTION 1 When pressing the switch do not touch the terminal block It has a high voltage so doing so may cause electric shock 2 After closing the liquid stop valve clos...

Страница 11: ...e recommend a flathead screwdriver be used to tighten the screws The screws are packed with the terminal board Observe the notes mentioned below when wiring to the power supply ter minal board Precaut...

Страница 12: ...ems with the work may cause heat and fires 3 Pull the wire and make sure that it does not disconnect Then fix the wire in place with a wire stop Strip wire end to this point Excessive strip length may...

Страница 13: ...turned off 1 3 Carry out the test operation in accordance with the operation manual to ensure that all functions and parts such as louver movement are working properly The air conditioner requires a...

Страница 14: ...0704 HT 3P192882 1C M06B162B Two dimensional bar code is a code for manufacturing 00_CV_3P192882 1C fm Page 2 Tuesday March 6 2007 4 41 PM...

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