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4.4. Connection and installation of indoor, outdoor unit refrigerant pipe
1.Pipeline inspection
Before connecting the pipes, they must be checked, and be installed after meeting the following
requirements.
1) lnside the tube it must be clean and free of dirt.
2) Bell port and spiral port on bath ends must be intact.
2.Pipe connections
On operation of connecting the condenser tubes of the indoor unit, the operation is required to be done
quickly. During field installation, operation time for connecting two tubes should not exceed 5 minutes.
1) When connecting the connector on the bell port, be sure to make two pipes concentric and aligned,
and then nested the spiral port, and screwed it in, finally tightened with a wrench, shown in figure
below:
Fix
Connect the solid brass, before operation, regulate the torque wrench according to tightening force
parameters listed in Table below.
Pipe diameter(mm)
4.lnstallation of unit
Notes:
Use two wrenches, ordinary wrench, torque wrench
each one.
6.35
9.52
12.7
15.88
19.05
16
Tightening force (kgf • m)
1.4~1.7
1.4~1.7
4.8 ~6.2
4.8 ~6.2
6.9 ~9.9
Table 4.5
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