Daikin VRV III REYQ8PY1 Service Manual page 161

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.
150
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 REYQ8-16PY1
Model REYQ18-20PY1
Model REYQ22-24PY1
Model REYQ26PY1
Model REYQ28-30PY1
Model REYQ32-40PY1
Model REYQ42PY1
Model REYQ44-46PY1
Model REYQ48PY1
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, "turn ON the power supply" following the
information on the page 154 ~.
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.
Liquid-pipe
stop valve
Open
Total length of
φ19.1-mm
× 0.26
liquid pipe)
Total length of
φ9.5-mm
× 0.059
liquid pipe)
Correction amount with a total capacity of indoor units
Correction
amount
Ratio of total capacity of the
3.6 kg
connected indoor units to
1.0kg the rated capacity of the
outdoor unit (A)
1.5kg
2.0kg
+
2.5kg 100%<A
3.0kg 120%<A
3.5kg
4.0kg
4.5kg
Equalizing pipe Dual pressure gas
stop valve pipe stop valve
Open
Total length of
φ15.9-mm
× 0.18
liquid pipe)
Total length of
φ6.4-mm
× 0.022
liquid pipe)
Correction amount
Model
REYQ18 -
32PY1
≤ %
120 0.5kg
≤ %
130 0.5kg
Suction pipe
stop valve
Open
Open
Si37-701
× 1.02
Model
REYQ34 -
48PY1
1.0kg
Test Operation