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3. Installation Standards
3-1. Method of gas leak inspection after completing the tubing
1. Procedure
Connect the indoor unit, tubing, and outdoor unit, and check for gas leakage according to the following procedure (also
check the service valve and the sealing of spindle).
Refrigerant tubing work
(tube, indoor unit side)
2. Seal inspection
1) Pressurizing & standing time
Pressurize nitrogen gas from the narrow tube and wide tube of the charging port of service valve of each refriger-
ant tubing system.
1 Step 1
2 Step 2
2) Evaluation of leaks
5
1 In case of no pressure drop
2 In case of pressure drop
Check the leaking spots with soap water.
In case no leaking spot can be detected with soap water
Inspect with gas leak tester, after sealing freon gas.
However, if there is a difference in ambient temperature at the time of pressuring and pressure drop checking, invariably
evaluate by allowing for the compensation.
(The pressure changes by about 0.1 kg/cm
In case of a drop (check & rectify the leaking spot)
OK
In case of a drop (check & rectify the leaking spot)
2
Pressurize with 3 kg/cm
at first, and then 15 kg/cm
'
Check of large leaks possible
Pressurize with 30 kg/cm
2
: Leave standing for 24 hrs. or more
'
Check of fine leaks possible
OK
per 1 °C).
2
Pressurize nitrogen gas
(3
15 kg/cm G)
2
Check for pressure
drop
2
: Allow 5 min. or more each time
V - 12
Test Run and Others
Check for pressure
drop
Pressurize nitrogen gas
(30 kg/cm G)
2
1099_1143
TD831077
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- Technical Data
- Service Manual
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