Replenishing Refrigerant - Toshiba RAV-SM2244AT7 Installation Manual

Digital Inverter
How to Open the Valve
Open or close the valve.
Liquid side
Open the valve with a 4 mm hexagon wrench.
Gas side
Charge port
Closed completely
Main stopper
• 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
Valve size
Charge port
EN
Valve unit
Using a minus screwdriver,
turn it counterclockwise by
90° until it hits the stopper.
(Full open)
Flare nut
Handle position
Opened fully
Stopper pin
Movable part of valve (Stem)
50 to 62 N•m
Ø12.7 mm
(5.0 to 6.2 kgf•m)
20 to 25 N•m
Ø19.1 mm
(2.0 to 2.5 kgf•m)
14 to 18 N•m
(1.4 to 1.8 kgf•m)
Insulating the Pipes
• The temperatures at both the liquid side and gas side will
be low during cooling so in order to prevent
condensation, be sure to insulate the pipes at both of
these sides.
• Insulate the pipes separately for the liquid side and gas
side.
• Insulate the branch pipes by following the instructions in
the installation manual provided with the branch pipe kit.
• Use the insulating material provided as an accessory to
insulate the Ø19.1 mm pipe at the gas side.
• Seal the area where the Ø19.1 mm pipe and Ø22.2 to
Ø28.6 mm pipe are connected so that no gaps are left.
REQUIREMENT
Be sure to use an insulating material which can withstand
temperatures above 120°C for the gas side pipe since this
pipe will become very hot during heating operations.

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.
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