Daikin VRV III REYQ8PY1 Service Manual page 170

Si37-701
1.2.5.2.1 Procedure of Adding Refrigerant charging
1. Make sure the following works are complete in accordance with the installation manual.
2. Calculate the "additional charging amount" using "How to calculate the additional refrigerant
3. Open the valve B (See next figure. The valve A,C and the liquid pipe, suction gas pipe, HP/
REYQ8~16PY1
REYQ18~48PY1
4. If the "additional charging amount" was charged fully, close the valve B and go to step 7.
5. Perform the refrigerant charging operation following [Refrigerant charging operation
Test Operation
Piping work
Wiring work
Air tight test
Vacuum drying
Installation work for BS, indoor unit
to be charged" in "6 Example of Connection".
LP gas pipe, equalizer pipe shutoff valves must be left closed), and charge the refrigerant of
the "additional charging amount" from the liquid side shutout valve service port.
Charge hose
Measuring device
R-410A tank (with siphon)
: Field pipings
: Refrigerant flow
HP/LP gas pipe shutoff valve
Measuring device
R-410A tank (with siphon)
: Field pipings
: Refrigerant flow
If the "additional charging amount" was not charged fully, close the valve B and go to step 5.
procedure] as shown below, and charge the remaining refrigerant of the "additional charging
amount". For performing the refrigerant charging operation the push button on the PC board
(A1P) of outdoor unit (In case of multi system, master unit) are use. (See the figure on the
previous page) In addition, the refrigerant are charged from the refrigerant charge port via
the valve A.
(See the next figure)
For operating the push button and opening and closing the valve, follow the work procedure.
Refrigerant charge port
HP/LP gas pipe shutoff valve
Suction gas shutoff valve
Liquid pipe shutoff valve
Valve B
Valve C
Valve A
Equalizer pipe shutoff valve
Suction gas
Charge hose
shutoff valve
Liquid pipe
shutoff valve
Refrigerant
charge port
Valve A
Valve B
Valve C
Test Operation
Outdoor
unit
: Shutoff valve
To BS,
( : Service port )
indoor unit
Outdoor Outdoor Outdoor
unit A unit B unit C
: Shutoff valve
To BS,
( : Service port )
indoor unit
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