CONDENSATE PIPING
The unit can now be piped up in accor- dance 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 pipework. When installing the Cassette the following points should be remembered:
1.Maximum pump lift is 36”.
2.The highest point in the condensate pipework should be as close to the unit as possible. This prevents a large volume of water draining back into the unit when it is switched off.
NOTE: There is a check valve at the pump discharge to prevent water from draining back into the unit. This piping technique will minimize any is- sues should the check valve become stuck open from airborne debris.
Duct collars: Branch duct and fresh air duct collars can be attached to the Cas- sette chassis by following the steps below:
Condensate Drain Connection
1.Locating the
Branch Duct Knockout
Correct
Incorrect
3.Condensate pipework should slope downwards in the direction of water fl ow with a minimum gradient of (1” per 10’). There must not be any uphill gradients other than in the fi rst 36” of pipework from the Cassette.
4.When multiple Cassettes are connect- ed to a common condensate drain, ensure the drain is large enough to handle the volume of condensate from several Cassettes. It is also rec- ommended to have an air vent in the condensate pipe work to prevent any air locks.
Small Unit
Medium &
Large Units
Fresh Air
Knockout
Notes: The number of
•Branch duct
•Fresh air
Recommendation: No more then 10’ of branch duct or fresh air duct should be installed.
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