MANUAL INSTALACION LE MANS - DIGITAL (U.I.).pdf

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 valve 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.)) 50 to 62 N•m (5.0 to 6.2 kgf•m)
Liquid side (9.52 mm (diam.)) 33 to 42 N•m (3.3 to 4.2 kgf•m)
Liquid side (6.35 mm (diam.)) 14 to 18 N•m (1.4 to 1.8 kgf•m)
Service port 14 to 18 N•m (1.4 to 1.8 kgf•m)
• 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.
Cap
SM802 type v alve at gas side
Loosened
Hexagonal wrench is required.
Cover
Tightened
Flare nut
Piping valve
14
Cover
Do not put the spanner or
torque wrench, etc. on the
cover.
The valve may be broken.
• On the contrary, use a single spanner to loosen or
tighten the flare nut of the valve at liquid side.
Charge port
Valve unit
Flare nut
Position of grooves for driver
Grooves for driver
Using a minus
screwdriver, turn it
counterclockwise by
90° until it hits the
stopper. (Full open)
Closed completely Opened fully
*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)