CACH/CAHH/CAHJ & CACH/CAHH/CAHK
Air Handlers
• Installation, Operation and Maintenance Manual •
P/N 240008108, Rev. G [07/08/10]
13
Condensate Piping
Th
e unit can now be piped up in accordance
with good refrigeration and/or plumbing
practices.
The Cassette is supplied with a 1/2” I.D.
fl exible PVC hose for connection to copper
or plastic drain piping.
When installing the cassette, consider the
following:
Maximum pump lift is 36” (0.9m).
1.
The highest point in the condensate
2.
piping should be as close to the unit as
possible. Th
is prevents a large volume of
water draining back into the unit when it
is switched off .
NOTICE
Th
ere is a check valve at the pump dis-
charge to prevent water from draining
back into the unit. Th
is piping technique
will minimize any issues should the
check valve become stuck open from
airborne debris.
Condensate pipe-work should slope
3.
downwards in the direction of water fl ow
with a minimum gradient of 1” per 10’
(8mm/1m). There must be no uphill
gradients other than in the fi rst 36” (0.9m)
of pipe-work from the cassett e.
When multiple cassett es are connected to
4.
a common condensate drain, ensure the
drain is large enough to handle the total
volume of condensate.
NOTICE
A drain line vent may be required to pre-
vent siphoning of water from the drain
pan and associated noise.
The highest point of the con-
Figure 10
densate piping should be as
close to unit as possible
Correct
Correct
Incorrect
Incorrect
Condensate drain
Figure 11
Condensate Drain Connection