(© Oct, 2007)
Air Technology Systems, Inc.
Compact CW Series Installation, Operation & Maintenance Manual
2-3
raised floor to match blower discharge opening(s) and
any required piping and wiring holes. Refer to the
installation drawing supplied with the unit for dimen-
sional information.
NOTE
Equipment must be level to operate properly.
2.5
Air Distribution Connection
2.5.1
Downflow Configuration Air Patterns
In a downflow configured unit, the conditioned supply
air discharges through the bottom of the unit into a
raised floor. There are two basic return air patterns: top
free return and top ducted return (see Figure 7).
When determining ducting requirements, always
consult your local or state codes. The duct system
should be designed to allow the air to move with as
little resistance as possible.
The return inlet is provided with a turned-in flange on
top of the unit for connection of the ductwork. Refer to
the installation drawing provided with the unit. The
connection of ductwork to the unit may be made with
either pop rivets or self-tapping screws.
2.5.2
Upflow Configuration Air
Patterns
In an upflow configured unit, the conditioned supply air
has two methods of discharge: ducted or through a 2
or 3-way grilled plenum box. There are two basic return
air patterns: front free return and rear ducted return
(see Figures 8 and 9).
The supply air outlet and the rear ducted return air inlet
are provided with a flange for connection of the
ductwork (refer to the installation drawing provided with
the unit). The connection of ductwork to the unit may
be made with either pop rivets or self-tapping screws.
TOP FREE RETURN
TOP DUCTED RETURN
RETURN
AIR INLET
SUPPLY
AIR OUTLET
RETURN
AIR INLET
SUPPLY
AIR OUTLET
Figure 7- Downflow Configuration Typical Air Patterns
