Daikin RXYQ96PYDN Service Manual page 89

Test Operation
Check on amount of refrigerant
charge
• Calculate a necessary additional refrigerant charging amount according to the procedure for
*
• If there is a refrigerant shortage after completion of vacuum drying, close the liquid and gas stop
• If the refrigerant charging is still insufficient, turn ON the power supply following the
Check the status of the
stop valves
74
calculation shown below.
Procedure for calculating additional refrigerant charging amount (Unit: 0.1 kg)
(Total length (ft)
R = of liquid piping
size at φ7/8)
(Total length (ft)
of liquid piping
size at φ5/8)
(Total length (ft)
of liquid piping
size at φ3/8)
HEAT PUMP SYSTEM
MODEL NAME
RXYQ72 ~ 120PYDN
RXYQ72 ~ 120PTJU
RXYQ144PTJU
RXYQ144 ~ 192PYDN
RXYQ168 ~ 192PTJU
RXYQ216 ~ 240PYDN
RXYQ216 ~ 240PTJU
valves and charge liquid refrigerant through the stop valve service port.
information on the page 75 ~.
Has the additional refrigerant charging amount been
recorded on the Precautions for Servicing label?
Check to be sure the following stop valves are open:
Liquid-pipe
stop valve
Open
Is a correct quantity of refrigerant charged?
The following method is available for additional charging of
refrigerant.
(1) Calculate additional refrigerant quantity.
(Total length (ft)
0.249
of liquid piping
size at φ3/4)
(Total length (ft)
0.121
of liquid piping
size at φ1/2)
(Total length (ft)
0.040
of liquid piping
size at φ1/4)
THE AMOUNT OF
REFRIGERANT AMOUNT FOR EXCEEDING
REFRIGERANT CONNECTION CAPACITY OF INDOOR UNIT
INDOOR
—
CONNECTION
CAPACITY
7.9 lb
MORE THAN 100%
2.2 lb
120% OR LESS
MORE THAN 120%
3.3 lb
130% OR LESS
Equalizing pipe Dual pressure gas
stop valve pipe stop valve
Open
0.175
0.081
0.015
MODEL NAME
RXYQ72 ~ 240PYDN
RXYQ72 ~ 240PTJU
1.1 lb
1.1 lb
Suction pipe
stop valve
Open
Open
VRVIII R-410A Heat Pump 60Hz
SiUS34-801A_b