Service manual

47
◆
When connect, smear both inside and outside of the are nut with freeze motor oil, screw it by hand and then
tighten it with spanner.
◆
Refer to form 1 to check if the wrench had been tightened (too tight would mangle the nut and lead leakage).
◆
Examine the connection pipe to see if it had gas leakage, then take the treatment of heat insulation, as shown in
the g.5.
◆
Only use median sponge to entwine the wiring interface of the gas pipe and heat preservation sheath of the gas
collection tube.
Smear freeze motoroil
here
Spanner
Thread fasten(x4)
Median sponge (attachment)
(entwine the wiring interface
with seal mat)
Gas collection tube
Liquid inlet tube
Heat preservation
sheath of liquid inlet
tube (attachment) (for
liquid tube)
Heat preservation
sheath of gas collection
tube (attachment)(for
gas tube)
Flare nut
Wiring interface
Torque wrench
Form 1: The tightening torque needed for tightening nut
Diameter
（
Inch
）
Surface thickness
（
mm
）
Tightening torque (N
·
m)
φ1/4’’
≥
0.5 15-30 (N
·
m)
φ3/8’’
≥
0.71 30-40 (N
·
m)
φ1/2’’
≥
1 45-50 (N
·
·m)
φ5/8’’
≥
1 60-65 (N
·
m)
φ3/4’’
≥
1 70-75 (N
·
·m)
★
Drainage hose
a. Install the drain hose
◆
The diameter of the drain hose should be equal or bigger than the connection pipe’s. ( The diameter of polythene
pipe: Outer diameter 25mm Surface thickness
≥
1.5mm)
◆
Drain hose should be short and drooping gradient should at less 1/100 to prevent the formation of air bubble.
◆
If drain hose cannot has enough drooping gradient, drain raising pipe should be added.
◆
To prevent bent of the drain hose, the distance between hoisting stand should is 1 to 1.5m.
◆
Use the drain hose and clamp attached. Insert the drain hose to the drain vent, and then
tighten the clamp.
◆
Entwine the big sponge on the clamp of drain hose to insulate heat.
◆
Heat insulation should be done to indoor drain hose.
45