Toshiba RAV-GP1101AT8-E Manuel D'installation page 83

Groove position
Groove to insert
a screwdriver
Closed completely Opened fully
• While the valve is fully opened, after the screwdriver
has reached the stopper, do not apply torque
exceeding 5 N•m. Applying excessive torque may
damage the valve.
Valve handling precautions
• Open the valve stem until it strikes the stopper.
It is unnecessary to apply further force.
• Securely tighten the cap with a torque wrench.
Cap tightening torque
Cap tightening torque
Valve Ø9.5 (H22)* 33 to 42 N·m Service valve
size (3.3 to 4.2 kgf·m)
Ø9.5 (H19)* 14 to 18 N·m Service valve
(1.4 to 1.8 kgf·m)
Ø15.9 20 to 25 N·m Ball valve
(2.0 to 2.5 kgf·m)
14 to 18 N·m Ball valve
Charge port
(1.4 to 1.8 kgf·m)
* The H dimension is the width across flats of
H
the cap.
EN-163
Replenishing Refrigerant
This model is a 30 m chargeless type that does not need
to have its refrigerant replenished for refrigerant pipes up
to 30 m. When a refrigerant pipe longer than 30 m is
used, add the specified amount of refrigerant.
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.
Valve type
Charging additional refrigerant
Figure of Single
Indoor Unit
Outdoor Unit Outdoor Unit
Formula for calculating the amount of additional refrigerant
(Formula will differ depending on the diameter of the liquid connecting side pipe.)
* to are the lengths of the pipes shown in the figures above (unit: m).
1 4
Single
Diameter of connecting pipe
(liquid side)
Ø9.5
Simultaneous twin
Diameter of connecting pipe
Outdoor
(liquid side)
unit
1 2
GP110 Ø9.5 Ø6.4
GP140
Ø9.5 Ø9.5
GP160
Simultaneous triple
Diameter of connecting pipe
Outdoor
(liquid side)
unit
1 2
GP160 Ø9.5 Ø6.4 Ø6.4
- 82 -
Figure of Simultaneous twin Figure of Simultaneous triple
Indoor Unit
Indoor Unit
Indoor Unit
Distributor
Outdoor Unit
3
2
1
Amount of additional
Amount of additional refrigerant (g) =
refrigerant per meter (g/m)
Amount of refrigerant charged for main pipe
40
Amount of
Amount of additional refrigerant (g) =
additional
Amount of refrigerant charged for main pipe +
refrigerant per
amount of refrigerant charged for branch
meter (g/m)
3
Ø6.4 40 20
× ( – 28) +
1
Ø9.5 40 40
Amount of Amount of additional refrigerant (g) =
additional Amount of refrigerant charged for main
refrigerant per pipe + amount of refrigerant charged for
meter (g/m)
3 4
Ø6.4 40 20 × ( – 28) +
1
Indoor Unit
Indoor Unit
4
2 3
Distributor
1
× ( –30)
piping
× ( + – 4)
2 3
branch piping
× ( + + – 6)
2 3 4
EN-164