Daikin VRV III, Руководство по обслуживанию, Страница: 236 / 567

SiUS34-801A_b Test Operation
VRVIII R-410A Heat Recovery 60Hz 221
•
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 lb)
Correction amount with indoor unit Correction amount with a total capacity of indoor units
•
If there is a refrigerant shortage after the completion of vacuum drying, charge liquid refrigerant
through the stop valve service port with the liquid and gas stop valves closed. .
•
If the refrigerant charging is still insufficient, turn ON the power supply following the
information on the page 222.
Check on amo u nt of refrigerant
charge
Is the correct qu antity of refrigerant charged?
The follo w ing method is a v aila b le for additional charging of
refrigerant.
(1) Calc
u late additional refrigerant qu antity.
+
HEAT RECOVER SYSTEM
+
REFRIGERANT AMOUNT FOR EXCEEDING
CONNECTION CAPACITY OF INDOOR UNIT
MODEL NAME
THE AMOUNT OF
REFRIGERANT
INDOOR CONNECTION
CAPACITY
MODEL NAME
REYQ72 ~ 120PYDN
7.9 lb
REYQ72 ~ 240PYDN
REYQ72 ~ 240PTJU
REYQ72 ~ 144PTJU
REYQ144 ~ 192PYDN
2.2 lb
MORE THAN 100%
120% OR LESS
1.1 lb
REYQ168 ~ 192PTJU
REYQ216 ~ 240PYDN
3.3 lb
MORE THAN 120%
130% OR LESS
1.1 lb
REYQ216 ~ 240PTJU
R =
(Total length (ft)
of liquid piping
size at
φ
7/8)
(Total length (ft)
of liquid piping
size at
φ
5/8)
(Total length (ft)
of liquid piping
size at
φ
3/8)
(Total length (ft)
of liquid piping
size at
φ
3/4)
(Total length (ft)
of liquid piping
size at
φ
1/2)
(Total length (ft)
of liquid piping
size at
φ
1/4)
0.249
0.121
0.040
0.175
0.081
0.015
1.02
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