Layout The Drain Pipe - Midea Air Conditioner Installation Manual

Table: 4-2
Steel beam and girder structure
Set and use supportive angle steel.
Pendant bolt
New concrete roughcast
Set it with embedded bushes or embedded bolts.
Flap type inser Slide type inser

5. LAYOUT THE DRAIN PIPE

5.1 Install the drain pipe of indoor unit
1) The drainpipe can use PVC pipe (external diameter about 37～
39mm, inner diameter is 32mm).
2) Joint drainpipe connector to the end side of water pumping pipe,
and fix drainpipe together with water outflow pipe and thermal
insulation tube by clasp of water outflow pipe (attached).
CAUTION
Don't use forcing strength to crack the water-pumping pipe.
a
Suspended bolt
Supportive angle steel
Concrete iron
Embedded bolt
(With embedded
bolt in pipe)
0.8～1.0 m Gradient:
higher than 1/100
≤200mm
50~100mm
Connective assembly of water outlet
Drainpipes from many units confluent water to main drainpipe and discharge to cloacae.
3) Water-pumping pipe and drainpipe from main body must be
wrapped by insulation tube evenly, and bound by tighten band for
obstructing air getting in and coagulation.
4) Prevent from water backflow into unit inside during shutdown,
the drain pipe shall place down side and drain water to outdoor
(drain side), the gradient of the drain pipe should be higher than
(1/100), without salient and water remain.(Refer to Fig.5-1 a)
5) When connecting drainpipe, don't drag the pipe that would pull
the main unit. For this, please arrange bearing points every 0.8 to
1.0 meter to avoid pipe be bended (See Fig.5-1 b).
6) When connect a lengthen drainpipe, apply protective tube to
wrap its indoor parts for ensuring the lengthen part connected
tightly.
7) In case the drainpipe outlet is higher than pumping connective
pipe of the main body, the drainpipe must be arranged upwards
vertically by using connective assembly of the water outlet for
vertical bending, and the height of the drainpipe shall set to the
defrosting pan surface no more than 1000mm, otherwise, too much
backflow while shutdown would leads to overflow (Refer to
Fig.5-2).
8) Base on the actual requirement to bend piping, and use
connective assembly of water outlet in terminal box for pipe layout.
The joints in drain system must be sealed to avoid water leakage.
9) The height from floor to the end of drainpipe or the bottom of
drain slot must more than 50 mm. Don't immerse the end of
drainpipe or the bottom of drain slot into water. When drain
condensate liquid to raceway, please bend the drainpipe to a
U-sharped hydroseal for avoiding stench transmitted by drainpipe
to indoor.
≤200mm
50~100mm
Main drainpipe
CAUTION
>1.0 m
b b
≤200mm
50~100mm
Gradient: 1/50~1/100
installation manual
Fig.5-1
Fig. 5-2
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