Midea MV5-X500W/V2GN1-AU - Concentrated Drainage Pipe; Lifting of Drainage Pipe (for the Unit with Lift Pump)

R410A All DC Inverter V5 X Series 50Hz MCAC-VTSM-2015-10
110 Installation
5.3 Concentrated drainage pipe
5.3.1 Concentrated drainage piping diameter
Select drainage pipe diameter according to indoor unit’s combined flow volume.
E.g. If one 1HP unit with 2L/h condensation discharge, the calculation of the combined flow volume of three
2HP units and two 1.5HP units is: 2HPx2L/hx3+1.5HPx2L/hx2 =18L
5.3.2 Relation between horizontal piping diameter and permitted displacement of condensation
PVC
piping
Inner diameter of
piping(reference value: (mm))
Inner diameter
of piping (mm))
Permitted displacement(1/h)
Remark
Slope 1:50
Slope 1:100
PVC25
19
20
39
27
(Reference value)could not be
used for confluence pipe
PVC32
27
25
70
50
PVC40
34
31
125
88
Could be used for confluence
pipe
PVC50
44
40
247
175
PVC63
56
51
473
334
Attention: joints require PVC40 or larger piping.
5.3.3 Relation between vertical piping diameter and displacement of condensation.
PVC
piping
Inner diameter of
piping(reference value: (mm))
Inner diameter of
piping (mm)
Permitted
displacement(1/h)
Remark
PVC25
19
20
220
(Reference value)could not be
used for confluence pipe
PVC32
27
25
410
PVC40
34
31
730
Could be used for confluence
pipe
PVC50
44
40
1440
PVC63
56
51
2760
PVC75
66
67
5710
PVC90
79
77
8280
Attention: joints require PVC40 or larger piping.
5.3.4 Operation process of concentrated drainage
Install indoor unit → connect drainage pipe → water pass test and overflow water test → thermal insulation of
drainage pipe
Caution:
1) Increase drainage point as much as possible and reduce quantity of connected indoor units, to ensure
horizontal main drainage pipe is not too long.
2) Units with drainage pump and natural drainage shall have separate drainage systems..
3) Add two elbows at air outlet, and make sure its mouth faces down to prevent dirt from entering and creating
blockages.
5.4 Lifting of drainage pipe (for the unit with lift pump)
Installation of lift pipe
1. When connecting drainage pipe with indoor unit, use pipe clamp shipped with unit to fix. Glue splicing is not
permitted for ensuring convenience in repairing.
2. To ensure 1/100 slope, total lift height of drainage pipe (H) shall depend on indoor unit’s pump, and do not
set vent pipe on the lifting pipe section. After lifting vertically, immediately place down inclined, otherwise it will
cause error operation of switch at water pump. The connecting method is shown as follows:
Gradient of drain pipe should be more than 1/100
Vent