Additional Charge Of Refrigerant - Daikin VRV Plus Series General Information Manual

Si33-003.book Page 97 Monday, June 25, 2001 9:06 AM
SiE33-003
7.4

Additional Charge of Refrigerant

Notes: 1. Refrigerant must be replenished for the R-407C VRV PLUS Series just as with past VRV Series.
2. If refrigerant is not replenished, the system will not operate properly.
3. For information on how to calculate the amount of refrigerant to be added, see next page.
Heat Pump System Example
Work points
1. Select a level spot to place the scale.
2. Invert the refrigerant cylinder and refill in liquid state.
3. Be careful not to get frostbitten by refrigerant when purging air from the charge hose.
4. Refill from liquid pipe and pressure equalizing pipe simultaneously.
5. You don't have to replenish refrigerant for each system. (You must check if the system need additional
6. Be sure to record the amount of refrigerant added on the label provided on the outdoor unit for that
You must add refrigerant according to the length of piping in the field just as with previous VRV Series. It
may be convenient to record the length of the piping after installation on the outdoor unit's label. When you
are finished vacuuming the system, add refrigerant before opening the outdoor unit's stop valve. Amount of
refrigerant is calculated according to the length of the liquid pipe.
General Information
Main Unit
(About –50˚C in atmosphere for R-407C)
refrigerant charge before proceeding.)
purpose as a reference for service or maintenance later on.
Sub Unit
Charge hose
Scale
: http://splitoff.ru/tehn-doc.html
Appendix
Gauge manifold
(V1056)
97