12
Cassette is supplied with 1/2” I.D. flexible PvC hose for
connection to copper or plastic drain piping.
Cassette installation considerations
1.
Maximum pump lift is 36” (0.9m) from base or bottom
of unit.
2.
Highest point in condensate piping should be as close
to unit as possible. Prevents large volume of water
draining back into unit when it is switched off.
3.
Check valve at pump discharge to prevent water from
draining back into unit. Piping technique minimizes
issues should check valve become stuck open from
airborne debris.
4.
Slope condensate pipe-work downward from highest
point in direction of water flow with minimum gradient
of 1” per 10’ (8mm/1m). No uphill gradients other than
in first 18” (0.45m) of pipe-work from cassette.
5.
When multiple cassettes are connected to common
condensate drain, insure drain is large enough to
handle total volume of condensate.
6.
Drain line vent may be required to prevent siphoning of
water from drain pan and associated noise.
figure 10 - Highest point of Condensate piping
Should Be As Close To Unit As possible
Correct
Incorrect
figure 11 - Condensate Drain
Condensate Drain Connection
COnDenSATe PIPIng
