Heat Insulation - Toshiba RAV-SM562XT-E Manuel D'installation

7
EVACUATING

Heat insulation

1. Provide heat insulation on the refrigerant piping on
both the liquid side and gas side separately, and
ensure that all joints in the insulation are completely
sealed (without gap).
2. Since the temperature of the piping on the gas side
increases during heating operations, the heat
insulating material used must be able to withstand
temperatures of more than 120°C.
3. Use the pipe insulation supplied in the accessory
pack to insulate the piping connecting section on the
indoor unit side.
Packed v alve handling precautions
• Open the valve stem all the way out; do not try to
open it beyond the stopper.
• Securely tighten the valve stem cap in torque as
follows:
Gas side (12.7 mm (diam.))
Liquid side (9.52 mm (diam.))
Liquid side (6.35 mm (diam.))
Service port
<For RAV-SM802AT-E model>
• As shown in the figure, be sure to use a double
spanner to loosen or tighten the flare nut of the valve
at gas side. If using a single spanner, the nut cannot
be tightened with necessary tightening torque.
SM802 type v alve at gas side
Cap
Loosened
50 to 62 N•m (5.0 to 6.2 kgf•m)
33 to 42 N•m (3.3 to 4.2 kgf•m)
14 to 18 N•m (1.4 to 1.8 kgf•m)
14 to 18 N•m (1.4 to 1.8 kgf•m)
Hexagonal wrench is required.
Cover
Piping valve
Tightened
Flare nut
• On the contrary, use a single spanner to loosen or
tighten the flare nut of the valve at liquid side.
Charge port
Position of grooves f or driver
Closed completely
*1. When opened fully, do not apply an excessive torque
after the screwdriver hit the stopper; other-wise a
trouble may be caused on the valve. (5 N•m or less)
14
Cover
Do not put the spanner or
torque wrench, etc. on the
cover.
The valve may be broken.
Valve unit
Using a minus
screwdriver, turn it
counterclockwise by
90° until it hits the
stopper. (Full open)
Flare nut
Grooves for driver
Opened fully