DC INVERTER MULTI VRF INSTALLATION
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wrench. as shown in fig.3.
☆ When connect, smear both inside and outside of the flare 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 fig.3.
☆ Only use median sponge to entwine the wiring interface of the gas pipe and heat preservation sheath of
the gas collection tube.
Heat preservation
sheath of gas collection
tube (attachment)(for
gas tube)
Heat preservation
sheath of liquid inlet
tube (attachment) (for
liquid tube)
Flare nut
Wiring interface
Spanner
Liquid inlet tube
Gas collection tube
Torque wrench
Median sponge (attachment)
(entwine the wiring interface
with seal mat)
Thread fasten(x4)
Smear freeze motoroil
here
Fig.3
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
1. Install the drain hose
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