Installation Details - Carrier 42QHF009DS Service Manual

10.Installation Details

10.1 Wrench torque sheet for installation
Outside diameter
mm
Ф6.35
Ф9.52
Ф12.7
10.2 Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Rated current of appliance
The cable size and the current of the fuse or switch are determined by the maximum current indicated on the
nameplate which located on the side panel of the unit. Please refer to the nameplate before selecting the
cable, fuse and switch.
10.3 Pipe length and the elevation
Maximum piping length and height difference
Max. length for all rooms (m)
Max. length for one IU (m)
Max. height difference
between IU and OU (m)
Max. height difference between IUs (m)
Charge less length(m)
Additional refrigerant charge(R410A) = ( Max. length for all rooms- Charge less length)*15 g/m
Note: When the pipe length is longer than charge less legth, the additional refrigerant should be added
according to the pipe length.
Caution:
● Refrigerant pipe diameter is different according to indoor unit to be connected. When using the extension
pipe, refer to the tables below.
● When refrigerant pipe diameter is different from that of outdoor unit union (for 18K indoor unit), additional
transfer connector needs to be used on outdoor unit union.
1500(153kgf.cm)
2500(255kgf.cm)
3500(357kgf.cm)
>3 and ≤6
>6 and ≤10
>10 and ≤16
>16 and ≤25
OU higher than IU
OU lower than IU
Torque
N.cm
Nominal cross-sectional area (mm² )
1 drive 2 1 drive 3
30 45
20 25
10 10
15 15
10 10
10 15
30 / 78
Additional tightening torque
N.cm
1600(163kgf.cm)
2600(265kgf.cm)
3600(367kgf.cm)
0.75
1
1.5
2.5
1 drive 4
60
30
10
15
10
20