Daikin VRV III REYQ8PY1, Service Manual

Page: 170 / 452

Si37-701 Test Operation
Test Operation 159
1.2.5.2.1 Procedure of Adding Refrigerant charging
1. Make sure the following works are complete in accordance with the installation manual.
„
Piping work
„
Wiring work
„
Air tight test
„
Vacuum drying
„
Installation work for BS, indoor unit
2. Calculate the “additional charging amount” using “How to calculate the additional refrigerant
to be charged” in “6 Example of Connection” .
3. Open the valve B ( See next figure. The valve A,C and the liquid pipe, suction gas pipe, HP/
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.
REYQ8~16PY1
REYQ18~48PY1
4. If the “additional charging amount” was charged fully, close the valve B and go to step 7.
If the “additional charging amount” was not charged fully, close the valve B and go to step 5.
5. Perform the refrigerant charging operation following [Refrigerant charging operation
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
Charge hose
Measuring device
R-410A tank (with siphon)
Valve A
Valve C
Valve B
Outdoor
unit
To BS,
indoor unit
: Field pipings
: Refrigerant flow
: Shutoff valve
( : Service port )
( : Service port )
: Field pipings
: Refrigerant flow
: Shutoff valve
Measuring device
R-410A tank (with siphon)
Charge hose
Valve A
Valve B
Valve C
Equalizer pipe shutoff valve
HP/LP gas pipe shutoff valve
Suction gas
shutoff valve
Liquid pipe
shutoff valve
Refrigerant
charge port
Outdoor
unit A
Outdoor
unit B
Outdoor
unit C
To BS,
indoor unit