Daikin VRV Plus Series General Information Manual page 36

Si33-003.book Page 32 Monday, June 25, 2001 9:06 AM
Installation
Vacuum Drying
There are two vacuum drying methods and the appropriate one should always be chosen to conform with
Procedure individual local conditions.
[Normal vacuum drying]........The standard method
[Operational steps]
1. Vacuum drying (1st time): Connect a manifold gauge to the service port of the liquid or gas pipe and
2. Carry out maintained vacuum test.
3. Additional charge of refrigerant.
4. Open stop valve to the full.
Note: Vacuums should be produced in both the liquid and the gas pipes.
(Because there are a large number of functional components in the indoor unit which cut off the vacuum
mid–way through)
32
operate the vacuum pump for at least 2 hours.
(The degree of vacuum produced should be in excess of 5 mmHg)
If after 2 hours the vacuum produced has not exceeded 5 mmHg then either there is moisture in the
pipe or there is a leak. Operate the vacuum pump for a further hour.
If, even after 3 hours, the vacuum has not reached 5 mmHg then check the system for a leak.
Produce a vacuum in excess of –755 mmHg and do not release it for an hour or more. Check the
vacuum gauge to make sure that it has not risen. (If the gauge does rise then there is still moisture in
the pipe or there is a leak somewhere.)
Connect the charging cylinder to the liquid pipe service port and charge with the required amount of
refrigerant.
Open the stop valves on the liquid and the gas pipes to the full.
: http://splitoff.ru/tehn-doc.html
SiE33-003
General Information