Daikin RTSQ20PY1 Service Manual page 142

Test Operation
Check on amount of refrigerant
charge
•
* Procedure for calculating additional refrigerant charging amount (Unit: 0.1 kg)
+
•
•
Check the stop valves for
conditions.
131
Is a proper quantity of refrigerant charged?
The following method is available for additional charging of
refrigerant.
(1) Calculate additional refrigerant quantity.
Calculate a necessary additional refrigerant charging amount according to the procedure for
calculation shown below.
Total length of
φ22.2-mm
R × 0.37
liquid pipe)
Total length of
φ12.7-mm
× 0.12
liquid pipe)
Correction amount with indoor unit
System name
Model RTSYQ10PY1
Model RTSYQ14PY1
Model RTSYQ16PY1
Model RTSYQ20PY1
If there is a refrigerant shortage, charge a liquid refrigerant through the stop valve service
port with the stop valves of liquid and those of gas closes after the completion of vacuum
drying.
If the refrigerant charging is still insufficient, "Additional Refrigerant Charge and Check
Operation" following the information on P.134~.
Has the additional refrigerant charging amount been
recorded on the "Precautions for servicing" label?
Check to be sure the stop valves are under the following
conditions.
System Name
RTSYQ10~16P
RTSYQ20P
Total length of
φ19.1-mm
× 0.26
liquid pipe)
Total length of
φ9.5-mm
× 0.059
liquid pipe)
Correction
amount
—
1.3kg
2.3kg
—
Name Liquid-pipe stop Equalizing pipe
valve
Open
Open
Total length of
φ15.9-mm
× 0.18
liquid pipe)
Total length of
φ6.4-mm
× 0.022
liquid pipe)
Gas pipe stop
stop valve valve
— Open
Open Open
SiBE31-801_C
× 1.02
Test Operation