Daikin RXYQ96PYDN Service Manual page 99

Test Operation
4. If the additional charging amount was charged fully, close valve B and go to step 6.
5. Perform the refrigerant charging following [Automatic refrigerant charging operation procedure]
Note:
84
Measuring device
R-410A tank (with siphon)
: Field pipings
: Refrigerant flow
If the additional charging amount was not charged fully, close valve B and go to step 5.
as shown below. Charge the remaining refrigerant of the additional charging amount.
For performing the automatic refrigerant charging operation, the push buttons on the PC-board
(A1) of outside units are used. (See figure 29.)
Refrigerant is charged from the refrigerant charge port via valve A. (See figure 31.) For
operating the push button and opening or closing the valves, follow the procedure.
During Automatic refrigerant charging operation, the system will select charging mode (cooling
mode or heating mode) by the following temperature condition:
Outdoor temp. : 32˚F DB ~ 109˚F DB
Indoor temp. :
Less than above range
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.
The refrigerant will be charged about 66 lb in one hour at outdoor temp. 86°F DB (about 26 lb at
outdoor temp. 32°F DB).
During Automatic refrigerant charging operation, you can force the operation to stop by pushing
MODE button (BS1).
Charge hose
Refrigerant charge port
Gas pipe shutoff valve
Liquid pipe shutoff valve
Valve B
Valve C
Valve A
< RXYQ144PTJU Only >
fig. 30
50˚F DB ~ 90˚F DB
SiUS34-801A_b
Outside unit A
: Shutoff valve
Indoor unit
(
: Service port
Cooling mode
Heating mode
VRVIII R-410A Heat Pump 60Hz
)