Air tightness test, vacuuming and adding refrigerant
Air tightness test
Notes:
After completion of the construction of fi tting pipe, air tightness test should be done for the
•
indoor unit and fi tting pipe.
Be sure not to take the infl ammable gas or air (oxygen) as the boosting gas, otherwise fi re or
•
explosion will be produced; only nitrogen can be used.
Operation procedures:
Step 1:
pressurize to 3.0MPa from the pipe at liquid side and air side (not exceed 3.0MPa).
Step 2:
keep this pressure for 24h and check whether it drops.
when temperature during pressurizing is different from that during observation, it shall
Note:
be corrected with the following formula: actual value = pressure during pressu
(temperature during observation – temperature during pressurizing) X 0.01Mpa
Step 3:
check whether there is leakage if pressure drops;
Step 4:
carry out air tightness test again after the leakage is repaired, release nitrogen after no
leakage is confi rmed.
nitrogen cylinder
hose 3
compound pressure
gauge
to indoor unit
outdoor unit
access valve
liquid valve
air value
hose 2
hose 1
26
AMS-SVX01A-EN
Содержание TX536
Страница 9: ...System diagram AMS SVX01A EN 9 ...
