-
223
-
When a vacuum air purge is completed, remove the valve rod cap nuts and open the service valves (both liquid and gas sides)
as illustrated below. After you have made sure that the valves are in the full-open position, lighten the cap nuts (for the valve
rods and charge ports).
Charge port
Vacuum
pump
Gas service valve
In-unit check joint
Charge hose
-101KPa (-755mmHg)
Compound pressure gauge
Pressure gauge
Gauge manifold
Handle Hi
Charge hose
Charge valve
Vacuum adapter
Handle Lo
Liquid service valve
(with a charge port)
• You can purge air with either liquid service valve or gas service valve.
(Example) If the FDCVA201 model is newly installed and the piping length is 40 m.
Additional Charge Amount: 0.2 kg = (40 – 30) m
×
0.020 kg/m
FDCVA151, 201
1.55
1.25
0.020
FDCVA251
1.75
1.45
Factory Charge Amount (for 30 m of pipe) (kg)
Standard Charge Amount (for 15 m of pipe) (kg)
Additional Charge Amount (for each 1 m of piping) (kg/m)
Item
Model
(4) Refrigerant
charge
(a) Please calculate a required refrigerant charge volume from the following table.
•
Models FDCVA151 ~ 251
•
If the system is recharged during servicing, etc., recharge in accordance with the following.
If the piping length is 15 m or less, recharge the system with the standard charge in the above table. If the piping length
is greater than 15 m, charge with the standard charge plus an additional charge amount corresponding to the length of
piping that exceeds 15 m.
(Example) If the model FDCVA201, with a piping length of 40 m is being recharged:
Recharge Amount: 1.75 kg = 1.25 kg + (40 – 15) m
×
0.020 kg/m
•
Models FDCVA302 ~ 1002
Formula to calculate the volume of additional refrigerant required
Additional charge volume (kg) = [Main length (m) - Factory charged volume 30 (m)]
×
0.06 (kg/m)
+ Total length of branch pipes (m)
×
0.06 (kg/m)
In the case of ø9.52 mm liquid piping
In the case of ø12.7 mm liquid piping
Model FDCVA302~602
Model FDCVA1002
Model
FDCVA802
Additional charge volume (kg) = [Main length (m) - Factory charged volume 30 (m)]
×
0.12 (kg/m)
+ Total length of branch pipes (m)
×
0.06 (kg/m)
1) A standard refrigerant charge volume means a refrigerant charge volume for an installation with 0 m long refrigerant
piping.
2) This unit contains factory charged refrigerant covering 30 m of refrigerant piping and additional refrigerant charge on
the installation site is not required for an installation with up to 30 m refrigerant piping. When refrigerant piping exceeds
30 m, please additionally charge an amount calculated from the pipe length and the above table for the portion in excess
of 30 m.
Notes (1) When an additional charge volume calculation result is negative, it is not necessary to charge refrigerant additionally.
Model
FDCVA302
FDCVA402
FDCVA502
FDCVA602
FDCVA802
FDCVA1002
Item
1.15
2.0
3.6
3.6
2.95
3.8
Standard refrigerant
charge volume (kg)
Additional charge volume (kg)
per meter of refrigerant piping
(liquid pipe)
Refrigerant volume
charged for shipment
at the factory (kg)
Installation's pipe length (m)
covered without additional
refrigerant charge
0.06
30
Liquid piping ø9.52 (mm) : 0.06
Liquid piping ø12.7 (mm) : 0.12
5.4
7.2
