– 19 –
Cap tightening torque
■
Replenishing refrigerant
This model is a 20 m* charge-less type that does not
need to have its refrigerant replenished for refrigerant
pipes up to 20 m
*
. When a refrigerant pipe longer than
20 m* is used, add the specified amount of refrigerant.
* GP80 : 30 m
Refrigerant replenishing procedure
1. After vacuuming the refrigerant pipe, close the
valves and then charge the refrigerant while the air
conditioner is not working.
2. When the refrigerant cannot be charged to the
specified amount, charge the required amount of
refrigerant from the charge port of the valve on the
gas side during cooling.
Requirement for replenishing refrigerant
Replenish liquid refrigerant.
When gaseous refrigerant is replenished, the
refrigerant composition varies, which disables normal
operation.
Cap tightening torque
Valve type
Valve
size
Dia.6.4mm
(GP56)
14 to 18 N•m
(1.4 to 1.8 kgf•m)
Service
valve
Dia.9.5mm
(GP80)
14 to 18 N•m
(1.4 to 1.8 kgf•m)
Service
valve
Dia.12.7mm
(GP56)
33 to 42 N•m
(3.3 to 4.2 kgf•m)
Service
valve
Dia.15.9mm
(GP80)
33 to 42 N•m
(3.3 to 4.2 kgf•m)
Service
valve
Charge port
14 to 18 N•m
(1.4 to 1.8 kgf•m)
Service
valve
To charge additional refrigerant
Formula for calculating the amount of additional refrigerant
(Formula will differ depending on the diameter of the liquid connecting side pipe.)
*
1
to
3
are the lengths of the pipes shown in the figures above (unit: m).
Single
Simultaneous twin
Diameter of connecting pipe
(liquid side)
Amount of additional
refrigerant per meter (g/m)
Amount of additional refrigerant (g) =
Amount of refrigerant charged for main pipe
α
Dia.6.4
20
α
× (
- 20)
(*1)
Dia.9.5
35
α
× (
- 30)
(*1)
Outdoor
unit
Diameter of connecting pipe
(liquid side)
Amount of
additional
refrigerant per
meter (g/m)
Amount of additional refrigerant (g) =
Amount of refrigerant charged for main pipe +
amount of refrigerant charged for branch
piping
1
2
3
α
β
GP80
Dia.9.5
Dia.6.4
Dia.6.4
35
20
α
× (
1
- 28) +
β
× (
2
+
3
- 4)
(*1)
(*1) Even if the calculation result is less than 0, it is not necessary to decrease the amount of refrigerant.
2
3
1
Figure of single
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Figure of simultaneous twin
37-EN
38-EN
Summary of Contents for RAV-GP561ATW-E
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