McQuay MDS030AR Applications Manual page 95

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.
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
Condensate
water collector
Indoor unit
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).
Condensate pipe group of multiple units
2HP
25
30 or more
4HP
25
Metal clip
Heat insulation part (binding)
Maximize the
pipe diameter
Design & installation Guide For McQuay MDS Multi System
2HP
25
Pipe mouth facing downward
to prevent foreign matters
Air vent pipe
Auxiliary
condensate pipe
Heat insulation
part (condensate pipe)
hanging interval
1:100 or greater slope
Heat insulating material
1.5-2m
Pole
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