McQuay MDS080BR Guia de Instalação Página 96

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Design & installation Guide For McQuay MDS Multi System
4.4.5 The Main Drainage Pipe of Multiple Indoor Units
The pipe should be mounted from the upstream, and the diameter of the downstream connecting
pipe should be as long as possible.
The pipe should be as short as possible and the number of the indoor units must be as small as
possible.
Condensate pipe group of multiple units
25
1
/1
0
0
4HP
2HP
25
30 or more
2HP
25
Pipe mouth facing downward
to prevent foreign matters
Air vent pipe
4.4.7 Key Points
The diameter of the condensate pipe should be more than or equal to that of the drainage
pipe.
The condensate pipe should be insulated.
The lift pipe of the condensate pipe should be installed before the indoor unit. When the unit
is running, if there is water in the condenser collector, please check whether the condensate
pump is working properly.
All the connecting wiring should be solid (especially the PVC pipe).
4.4.6 Accessory Condensate Pipe (Hose)
If the condensate collector is made of polystyrene, it should use the hose. The condensate pipe
box can easily connect with the condensate pipe to prevent the condensate coil distorted
Indoor unit
Heat insulation part (binding)
Condensate
water collector
Metal clip
Auxiliary 
condensate pipe
Indoor unit
Maximize the
pipe diameter
Heat insulating material
1:100 or greater slope
hanging interval
1.5-2m
Pole
Heat insulation 
part (condensate pipe)
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