Invest MSC-24/QD FP, Service Manual

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7. Installation details
7.1 Wrench torque sheet for installation
Outside diameter Torque
mm inch Kgf.m
Ф 9.52 3/8 4.2
Ф 16.0 5/8 6.6
7.2 Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Grade
Unit 9K 12K 18K 24K
mm
2
1.5 1.5 2.5 2.5
7.3 Pipe length and the elevation
Pipe size
Additional Max. Max.
Capacity
Btu/h
Gas Liquid
Standard
length refrigerant Length Elevation
(g/m) A (m) B (m) (m)
24K 5/8’’ ( Ф 16.0) 3/8’’ ( Ф 9.52) 5 10 25 40
Caution:
Capacity is based on standard length and maximum allowance length is base of reliability.
Oil trap should be installed per 5-7 meters.
7.4 Air purging of the piping and indoor unit
Required tools:
Hexagonal wrench; adjustable wrench; torque wrenches, wrench to hold the joints and gas leak detector.
Note:
The air in the indoor unit and in the piping must be purged. If air remains in the refrigeration piping, it will affect
the compressor, reduce the cooling capacity, and could lead to a malfunction of unit.
Be sure, using a torque wrench to tighten the service port cap (after using the service port), so that it prevents