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Base plate
Tube to the tight
Tube to the back
Access hole cover
M4
M6
Tube fixing
panel
Tube to the left
Tube to the left
Tube to the tight
Fig.1 Outdoor unit below the indoor unit. Fig. 2 Outdoor unit is above the indoor unit
indoor unit
outdoor unit
Liquid check-ring
outdoor unit
indoor unit
Accumulator ( a set
per 6 meters)
5. Outdoor unit pipelines connection
According to the pipeline connection method, connect the distribute pipes and inlet & outlet liquid pipes.
(6)During welding, the gas pipe valve must be cooled down with a wet cotton cloth.
(7)The maximum connnection pipe is 50 meters, the maximum drop difference between indoor unit and outdoor unit is 30
meters.
(8)It should install the liquid check-ring and accumulator according to the outdoor unit and indoor unit position.(see the
following figures)
(1).In case of brazing weld of joint, nitrogen must be filled in the pipe to prevent oxidization.
(2).The refrigerant pipe should be newly-made and clean. During installation, do not let water and other substance into the pipe.
(3).Use two spanners to tighten the connecting nut. One spanner will make loose connection.
(4).The torque moment should conform to the specified value. (Refer to the below)
Torque moment for tightening the nut
4. Connection of refrigerant pipe
During installation, if refrigerant leakage occurs, ventilation measures must be taken. When refrigerant meets with fire,
hazadous gas will be produced.
After installation, make sure that there is no refrigerant leakage. Refrigerant, if meeting with heaters and stoves, ect. in
the room, may produce hazardous gas.
Connection of refrigerant pipe
(1)The joints of the refrigerant pipe are inside the unit. Take off the access
hole cover in front of the unit.
(2)The pipe can be connected from the front or bottom of the outdoor unit.
(3)Remove the L-shaped pipe from the valve by welding and connect the
accessory pipe to the valve.
(4)In the case of front connection, cut the accessory pipe at the height of the
fixing panel. Then join the pipe with an elbow and let it go through the fixing
panel. For the convenience of maintenance, bend the pipe down (once) and
then connect pipe to the right or left.
(5)In the case of bottom connection, join the pipe with accessory pipe through
the holes in the base plate of the outdoor unit, and connect pipe the left or
right or the back.
Warning
Installation Precedure
21
During welding of the distribution pipe
Tube diameter (mm)
Torque moment for
pre-installation (N.m)
12.70
Torque moment for
tightening up (N.m)
49.0(5.0kgf
.
m)
53.9(5.5kgf
.
m)
Outdoor Unit