Daikin REYQ8-48PY1B, Service Manual

Page: 179 / 477

SiBE37-701_B Test Operation
Test Operation 168
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” on page 446.
3. Open the valve B ( See figure below. The valve A, C and the liquid pipe, suction gas pipe,
HP/LP gas pipe stop valves must be left closed), and charge the refrigerant of the “additional
charging amount” from the liquid side shutout valve service port.
REYQ8~16PY1B
4. If the “additional charging amount” was charged fully, close the valve B and go to step 6.
If the “additional charging amount” was not charged fully, close the valve B and go to step 5.
5. Perform the refrigerant charging following [Automatic refrigerant charging operation
procedure] as shown below. And charge the remaining refrigerant of the “additional charging
amount”.
Note:
z
For performing the automatic refrigerant charging operation, the push button on the PCB
(A1) of outdoor unit are used. (See page 167.)
And the refrigerant are charged from the refrigerant charge port via the valve A. (See above
figure.) For operating the push button and opening or closing the valves, follow the
procedure.
z
During Automatic refrigerant charging operation, the system will select charging mode
(cooling mode or heating mode) by the temperature condition as follows.
When charging in cooling mode, the system will stop operation when the required amount of
refrigerant is charged.
During charging in heating mode, a person must manually close valve A and stop operation.
Beforehand, check the remaining refrigerant that is needed to charge based on the
“additional charging amount” in step 2 and the charged amount in step 3.
z
The refrigerant will be charged about 30kg in one hour at outdoor temp. 30°C DB (about
12kg at outdoor temp. 0°C DB).
z
During Automatic refrigerant charging operation, you can stop the operation forcedly by
pushing MODE button (BS1).
REYQ8~16PY1B
Charge hose
Measuring device
R-410A tank (with siphon)
: Field pipings
: Refrigerant flow
Valve C
Valve A
Valve B
Refrigerant charge port
HP/LP gas pipe stop valve
Suction gas stop valve
Liquid pipe stop valve
Outdoor
unit
To BS,
indoor unit
: Stop valve
( : Service port )
Outdoor temp. : 0°C DB ~ 43°C DB
Indoor temp. :
10°C DB ~ 32°C DB
Less than above range
Cooling mode
Heating mode
: Field pipings
: Refrigerant flow when charging
R-410A tank (with siphon)
Measuring device
Charge hose
: Stop valve
( : Service port )
Refrigerant charge port
HP/LP gas pipe stop valve
Suction gas stop valve
Liquid pipe stop valve
Valve B
Valve C
Valve A
Outdoor
unit
To BS, indoor unit