Additional Refrigerant Charge - Daikin VRV Plus Series General Information Manual

Si33-003.book Page 145 Monday, June 25, 2001 9:06 AM
SiE33-003
6.6

Additional Refrigerant Charge

Caution Refrigerant may only be charged after performing the leak test and the vacuum drying. (See above.)
When charging a system, care shall be taken that its maximum permissible charge is never exceeded, in
view of the danger of liquid hammer.
Charging with an unsuitable substance may cause explosions and accidents, so always ensure that the
appropriate refrigerant (R-407C) is charged.
Refrigerant containers shall be opened slowly.
Always use protective gloves and protect your eyes when charging refrigerant.
Notes:
1. After filling the refrigerant with the outdoor unit off (always fill the tank with the unit off, and then start it
2. Open up the gas side valves and valves for sub unit (both gas and liquid side).
1. Proceed to refrigerant adding mode by selecting "setting mode 2". (Refer to the "CAUTION on
2. Once the set amount of refrigerant has been filled, press the RETURN button on the A1P, and stop
3. Remove the refrigerant charge hose and be sure to open up the liquid side valve all the way.
Installation Manual
This outdoor unit is factory charged with refrigerant and depending on pipe sizes and pipe lengths some
systems require additional charging of refrigerant.
Charge the refrigerant to the liquid pipe in its liquid state. Since R-407C is a mixed refrigerant, its
composition changes if charged in a state of gas and normal system operation would no longer be
assured.
Before filling, check whether the tank has a siphon attached or not.
How to fill a tank with a siphon attached.
Fill with the tank upright.
There is a siphon tube
inside, so there is no need
to turn the tank upside-down.
Other ways of filling the tank
Fill with the tank upside-down.
Determine the weight of refrigerant to be charged additionally referring to the item "Additional
refrigerant to be charged" in chapter "Example of connection". And fill in the amount in the "Request for
the indication of additional refrigerant charging amount and installation date" attached to the unit.
After the vacuum drying is finished, charge the additional refrigerant in its liquid state through the liquid
stop valve service port. Taking into account following instructions:
1. Check that gas and liquid stop valves are closed.
2. Stop the compressor and charge the specified weight of refrigerant.
If the outdoor unit is not in operation and the total amount cannot be charged, follow the procedures for
additional refrigerant charge shown below.
Make sure to use installation tools you exclusively use on R-407C installations to withstand the
pressure and to prevent foreign materials from mixing into the system.
Procedure for filling added refrigerant (Connect the refrigerant charge hose as shown in the diagram in
next page.)
up, otherwise it may break), and then turn on the indoor and outdoor power.
Be sure to close the liquid side valve. (Otherwise filling will be impossible.)
OPERATION" on the PCboard (A1P) on the outdoor unit for settings. Operation will not be possible
immediately after power is turned on (until the LED H2P goes off: up to 12 minutes).
operation.
(It takes 30 minutes, but if filling is not completed in 30 minutes, re-set and start again.)
(V0903)
(V0904)
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Refrigerant Piping
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