EMI CAC_36, Инструкция по установке, эксплуатации и обслуживанию

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Cassette Air Handler
10
fresh Air
Knockout
branch Duct Knockout
Cassette 12
CASSETTE 24 & 36
NOTES:
The number of knock-outs varies de-
pending on unit size.
• Branch duct knock-outs are 5¼” (133mm) round
• fresh air knock-outs are 1¼” x 2½” (32 x 64mm)
rectangular on Cassette 12 and 3” (76mm) square
on Cassette 24 & 36.
Recommendation:
no more than 10’
(3m) of branch duct or fresh air duct should
be installed.
CONdENSATE pIpINg ANd dUCT CONNECTIONS
The unit can now be piped up in ac
-
cordance with good refrigeration and/or
plumbing practices.
The Cassette is supplied with a 1/2”
I.D. flexible PVC hose for connection to
copper or plastic drain pipework. When
installing the Cassette the following points
should be noted:
1. Maximum pump lift is 36” (0.9m).
2. The highest point in the condensate
pipework should be as close to the unit
as possible. This prevents a large vol
-
ume 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 mini-
mize any issues should the check valve be-
come stuck open from airborne debris.
Correct
Incorrect
Condensate Drain Connection
3. Condensate pipe-work should slope
downwards in the direction of water flow
with a minimum gradient of 1” per 10’
(8mm/1m). There must not be any up
-
hill gradients other than in the first 36”
(0.9m) of pipe-work from the Cassette.
4. When multiple Cassettes are connected
to a common condensate drain, ensure
the drain is large enough to handle the
volume of condensate from several
Cassettes. It is also recommended to
have an air vent in the condensate pipe
work to prevent any air locks.
Duct collars:
Branch duct and fresh air
duct collars can be attached to the Cas
-
sette chassis by following the steps below:
1. Locating the knock-out holes.
NOTE:
A drain line vent may be required to
prevent siphoning of water from the drain pan
and associated noise.