Drainage Pipe Installation - North American HVAC MOC-12HFN1-MS0W Service Manual

Drainage pipe installation

5.2.10 Set the wall conduit
5.2.11 Set the supporter for the pipe.
5.2.12 Locate the pipe and fix it by supporter
 For horizontal refrigerant pipe, the distance between supporters should not be exceed 1m.
 For vertical refrigerant pipe, the distance between supporters should not be exceed 1.5m.
5.2.13 Connect the pipe to indoor unit and outdoor unit by using two spanners.
 Be sure to use two spanners and proper torque to fasten the nut, too large torque will damage the
bellmouthing, and too small torque may cause leakage. Refer the following table for different pipe
connection.
Pipe Diameter
(kgf.cm)
1/4" (6.35) 144~176
3/8" (9.52) 333~407
1/2" (12.7) 504~616
5/8" (15.9) 630~770
3/4" (19) 990~1210
6 Drainage pipe installation
Install the drainage pipe as shown below and take measures against condensation. Improperly installation
could lead to leakage and eventually wet furniture and belongings.
6.1 Installation principle
 Ensure at least 1/100 slope of the drainage pipe
 Adopt suitable pipe diameter
 Adopt nearby condensate water discharge
6.2 Key points of drainage water pipe installation
6.2.1 Considering the pipeline route and elevation
 Before installing condensate water pipeline, determine its route and elevation to avoid intersection with
other pipelines and ensure slope is straight.
6.2.2 Drainage pipe selection
 The drainage pipe diameter shall not small than the drain hose of indoor unit
 According to the water flowrate and drainage pipe slope to choose the suitable pipe, the water flowrate
is decided by the capacity of indoor unit.
Relationship between water flowrate and capacity of indoor unit
Capacity (x1000Btu)
According to the above table to calculate the total water flowrate for the confluence pipe selection.
For horizontal drainage pipe (The following table is for reference)
PVC pipe Reference value of inner
98
Torque
(N.cm)
1420~1720
3270~3990
4950~6030
6180~7540
9270~11860
12
18
24
30
36
42
48
60
Allowable maximum water flowrate (l/h)
Sketch map
Water flowrate (l/h)
2.4
4
6
7
8
10
12
14
Remark
Installation