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5
Cassette Air Handler
STANDARD FEATURES
Continued
CASSETTE CONTROLS AND COMPONENTS
Continued
Fresh air connection: Fresh air may
be introduced to the unit by the addition
of ducts connected to the fresh air knock-
outs on the Cassette case. Recommend-
ed maximum length 10’ (3m) of 4” (0.1m)
diameter duct. The fresh air volume is ap-
proximately 7-10% of the unit’s published
maximum air ow (if more than 10% make
up air is needed, a fresh air booster fan is
required). Refer to Performance Data sec-
tion of this manual for further information.
The Cassette is best installed in new con-
struction or existing construction with a sus-
pended or false ceiling with enough clear-
ance to accommodate concealing the piping
and electrical connections to the unit.
PREPARATION FOR INSTALLATION
U The Cassette fascia and
main chassis are packaged together for
increased protection.
• Remove the banding straps and lift the
cardboard lid.
• Fascia is packed in bubble wrap and on
top of the chassis (fascia is not attached
to the chassis for shipping).
• Cardboard template is between the
chassis and the fascia (DO NOT throw
template away with packaging!).
• Lift the fascia and template from the box
and set aside.
• Remove the Cassette chassis from the
box utilizing the four corner brackets
for lifting. DO NOT use the drain or re-
frigerant connections for lifting.
• In order to protect the fascia from dirt
and damage, it should be returned to
the box until it is ready to be installed.
When branch ducting
is to be used, two polystyrene pieces for
blanking off fascia openings are Included
with the fascia packing. Up to two non-
adjacent sides may be blanked off.
DO NOT throw the two polystyrene blanking
off pieces out with packaging!
Electromechanical Operation (Stan-
An optional thermostat can be ob-
tained through EMI or your local distributor.
NOTE: make sure the thermostat is suitable for
unit operation (i.e., cooling only, cooling/electric
heat, heat pump.)
Filters: Metal framed lters are tted. These
are reusable and may be vacuum cleaned.
Condensate pump: A condensate
pump is designed to carry water out of
the unit. The pump is xed to a mounting
bracket which can be withdrawn from the
side of the chassis and incorporates an
inspection hole to allow a visual check of
the pump during operation. A oat switch
is tted to stop the cooling action (shut off
the compressor) should the pump become
blocked or fail.
IMPORTANT: Total lift for this pump is 36”
(0.9 m) or less.
Air vanes: Air outlet vanes are manual-
ly adjustable on the Cassette 12’s or driv-
en by an electric motor on the Cassette
24’s and 36’s. Where tted, the motorized
air vanes can be set to auto sweep or can
be stopped in a xed position.
Heating: The Cassette may be tted with
electric heaters which are equipped with
over-temperature limit switches. Consult fac-
tory for available models with electric heat.
System Options:
• Infrared Hand Held Controller
(CACB/CAHB only)
• 24V remote wall thermostat
• Electric Heat (@ 230V)
1.5 kW (Cassette 12’s)
3 kW (Cassette 24’s)
5 kW (Cassette 36’s)
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