Daikin VRV III REYQ10PY1B, Service Manual

Page: 167 / 472

Test Operation SiBE37-701
156 Test Operation
•
Calculate a necessary additional refrigerant charging amount according to the procedure for
calculation shown below.
* Procedure for calculating additional refrigerant charging amount (Unit: 0.1 kg)
Correction amount with indoor unit Correction amount with a total capacity of indoor units
•
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 160 ~.
Check on amount of refrigerant
charge
Is a proper quantity of refrigerant charged?
The following method is available for additional charging of
refrigerant.
(1) Calculate additional refrigerant quantity.
System name
Correction
amount
Ratio of total capacity of the
connected indoor units to
the rated capacity of the
outdoor unit (A)
Correction amount
Model REYQ8-16PY1B 3.6 kg
Model REYQ18-20P7Y1B 1.0kg Model
REYQ18 -
32P7Y1B Model
REYQ34 -
48P7Y1B
Model REYQ22-24P7Y1B 1.5kg
+
Model REYQ26P7Y1B 2.0kg
+
Model REYQ28-30P7Y1B 2.5kg 100%<A
≤
120
%
0.5kg
Model REYQ32-40P7Y1B 3.0kg 120%<A
≤
130
%
0.5kg 1.0kg
Model REYQ42P7Y1B 3.5kg
Model REYQ44-46P7Y1B 4.0kg
Model REYQ48P7Y1B 4.5kg
R
× 1.02
Total length of
φ
22.2-mm
liquid pipe)
× 0.37
Total length of
φ
9.5-mm
liquid pipe)
× 0.059
Total length of
φ
6.4-mm
liquid pipe)
× 0.022
Total length of
φ
19.1-mm
liquid pipe)
× 0.26
Total length of
φ
12.7-mm
liquid pipe)
× 0.12
Total length of
φ
15.9-mm
liquid pipe)
× 0.18
Check the stop valves for
conditions.
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 Open Open
Suction pipe
stop valve
Open
Equalizing pipe
stop valve
Dual pressure gas
pipe stop valve