Toshiba RAV-GP801AT-E Manual De Instalación página 83

Vacuum pump
As shown in the figure, connect the charge hose after
the manifold valve is closed completely.
Attach the connecting port of the charge hose with a
projection to push the valve core (setting pin) to the
charge port of the set.
Open Handle Low fully.
Turn ON the vacuum pump. (*1)
Loosen the flare nut of the packed valve (Gas side) a
little to check that the air passes through. (*2)
Retighten the flare nut.
Execute vacuuming until the compound pressure
gauge indicates –101 kPa (–76 cmHg). (*1)
Close Handle Low completely.
Turn OFF the vacuum pump.
Leave the vacuum pump as it is for 1 or 2 minutes, and
check that the indicator of the compound pressure
gauge does not return.
Open the valve stem or valve handle fully. (First, at
liquid side, then gas side)
Disconnect the charge hose from the charge port.
Tighten the valve and caps of the charge port securely.
EN-163
*1
Use the vacuum pump, vacuum pump adapter, and gauge
manifold correctly referring to the manuals supplied with
each tool before using them.
Check that the vacuum pump oil is filled up to the specified
line of the oil gauge.
*2
When air is not charged, check again whether the connecting
port of the discharge hose, which has a projection to push
the valve core, is firmly connected to the charge port.
How to Open the Valve
Fully open the valves of the outdoor unit. (First fully open
the valve on the liquid side, and then fully open the valve
on the gas side.)
* Do not open or close the valves when the ambient
temperature is -20°C or less. Doing so may damage
the valve O-rings and result in refrigerant leakage.
Liquid side
Open the valve with hexagon wrench.
Model Hexagon wrench size
GP80
4 mm
GP110
GP140
Gas side
<GP80>
Service valve
Open the valve with hexagon wrench.
Hexagon wrench size : 5 mm
Charge port
Valve stem
Valve stem
Valve unit
cap
Flare nut
<GP110, GP140>
Ball valve
Charge port
(1)
(2)
Groove position
Groove to insert
a screwdriver
Closed completely
• 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.
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Cap tightening torque
Cap tightening torque
Valve unit
Valve Ø9.5 (H22)* 33 to 42 N·m
size (3.3 to 4.2 kgf·m)
Ø9.5 (H19)* 14 to 18 N·m
(1.4 to 1.8 kgf·m)
Using a minus
Ø15.9 33 to 42 N·m
screwdriver, turn it
(3.3 to 4.2 kgf·m)
counterclockwise
Ø15.9 20 to 25 N·m
by 90° until it hits
the stopper. (Full (2.0 to 2.5 kgf·m)
open)
14 to 18 N·m
Charge port
(1.4 to 1.8 kgf·m)
Flare nut
* The H dimension is the width across flats of
H
the cap.
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.
Opened fully
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
Service valve
Service valve
Service valve
Ball valve
Service valve,
ball valve
EN-164