Connecting The Indoor Unit - Huawei FusionModule800 Quick Manual

1. Connect the liquid pipe stop valve first, and then the gas pipe stop valve.
2. Tighten the liquid pipe stop valve using a 27# torque wrench to a torque of 35–37 N· m.
Tighten the gas pipe stop valve using a 36# torque wrench to a torque of 50–52 N· m
3. When tightening a stop valve using a torque wrench, secure the hex nut of the active
connector at the welded copper pipe to prevent the copper pipe from turning and further
deforming as the stop valve is being tightened.
4. Ensure that you tighten the valve to the specified torque. The failure torque for the nut of the
liquid pipe stop valve is 70 N· m and that for the nut of the gas pipe stop valve is 100 N· m.
The torque greater than the failure torque will damage the screw thread.
7.3

Connecting the Indoor Unit

Wrap the gas pipe stop valve, liquid pipe
stop valve and the pipes connected to the
stop valves with thermal insulation foam
(the thickness is 5 mm).
7.4
Connecting the Outdoor Unit
The outdoor
unit has been
charged
R410A
refrigerant
before
delivery. To
avoid
refrigerant
leaks, do not
open the
outdoor unit
stop valve
before
vacuumizing is
complete.
7.5
Installing Nuts
When installing a needle valve nut and rear cover
nut, use the torque specified in the following table.
Needle Valve Nut
Tightenin
Item
Nut
Size
Liquid
pipe stop 17#
valve
Gas pipe
17#
stop valve
Rear Cover Nut
Nut
g Torque
Size
(N· m)
10 19#
10 30#
Tightening
Torque
(N· m)
15–17
Needle
20–22
valve nut
18
Black plastic nut
Rear
cover nut