Carrier 38QUS014DS2 series, Service Manual

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16 Installation Details
16.1.1 Wrench torque sheet for installation
Outside diameter Torque Additional tightening torque
mm N.cm N.cm
Ф6.35
1500(153kgf.cm) 1600(163kgf.cm)
Ф9.52
2500(255kgf.cm) 2600(265kgf.cm)
Ф12.7
3500(357kgf.cm) 3600(367kgf.cm)
16.1.2 Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Rated current of appliance Nominal cross-sectional area (mm²)
>3 and ≤6
0.75
>6 and ≤10
1
>10 and ≤16
1.5
>16 and ≤25
2.5
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.
16.1.3 Pipe length and the elevation
Maximum piping length and height difference
1 drive 2 1 drive 3 1 drive 4 1 drive 5
Max. length for all rooms (m)
30 45 60 75
Max. length for one IU (m)
25 30 35 35
Max. height difference between IU and OU (m)
15 15 15 15
Max. height difference between IUs (m)
10 10 10 10
Additional refrigerant charge
1 drive 2 1 drive 3 1 drive 4 1 drive 5
Chargeless pipe
length (m)
15 22.5 30 37.5
Additional
refrigerant charge
(g)
15 x (length for all
rooms - 15)
15 x (length for all
rooms
– 22.5)
15 x (length for all
rooms - 30)
15 x (length for all
rooms
– 37.5)
Caution:
●
Refrigerant pipe diameter is different according to indoor unit to be connected. When using the
extension pipe, refer to the tables below.