Midea MSY-09HRDN1-QC2, Service Manual

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7. Installation details
7.1 Wrench torque sheet for installation
Outside diameter Torque
mm inch Kgf.m
Ф 6.35 1/4 1.8
Ф 9.52 3/8 4.2
Ф 12.7 1/2 5.5
7.2 Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Grade
Unit 9K 12K 18K
mm
2
1.5 1.5 2.5
7.3 Pipe length and the elevation
Pipe size
Capacity
Btu/h
Gas Liquid
Standard
length
(m) Max.
Elevation
B (m) Max.
Length
A (m) Additional
refrigerant
(g/m)
9k 3/8 ’’ ( Ф 9.52) 1/4 ’’ ( Ф 6.35) 5 8 20 30
12k 1/2 ’’ ( Ф 12.7) 1/4 ’’ ( Ф 6.35) 5 10 25 30
18k 1/2 ’’ ( Ф 12.7) 1/4 ’’ ( Ф 6.35) 5 10 25 30
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.