© 1995-2009 Energy Saving Products Ltd.
Module RAI
Return Air Installation (2/2)
Module RAI Return Air Installation (2/2)
The return air base comes complete with a one-inch
(25mm)
filter and one-inch
(25mm)
filter rack. The filter is
a 3 medium filter approximately 14% efficient, and can
be replaced with any aftermarket filter. All the Return
Air bases come acoustically lined with half-inch sound
absorbing insulation.
Table 03 – Return Air Base dimensions
A
B
C
D
E
HE-50/51/52
24”
(610mm)
18
1
⁄
2
”
(470mm)
14
1
⁄
2
”
(368mm)
1
1
⁄
8
”
(28.6mm)
21
3
⁄
4
”
(552mm)
HE-70/71
24”
(610mm)
18
1
⁄
2
”
(470mm)
19
1
⁄
2
”
(495mm)
1
1
⁄
8
”
(28.6mm)
21
3
⁄
4
”
(552mm)
HE-100/101
24”
(610mm)
18
1
⁄
2
”
(470mm)
25
1
⁄
2
”
(648mm)
1
1
⁄
8
”
(28.6mm)
21
3
⁄
4
”
(552mm)
Energy Saving Products manufactures a return air
base with a built in filter rack that matches up to the fan
coil units.
Return Air Base
For installation of Heating and Cooling Add-Ons, Refer
to:
• Module RPM - Refrigerant Module Installation
• Module HWC - Hot Water Coil Installation
• Module WCM - Chilled Water Coil Installation
• Module ESH - Electric Strip Coil Installation
These manuals are included with the coils, and are also
available online at www.hi-velocity.com.
1
1
⁄
8
” Opening
Two 1
1
⁄
8
”
(28.58mm)
Rails (D) for fan coil
placement and Filter Holder
A
E
C
B
D
Fig. 03 - Return Air Design
(28.58mm)
For filter options and other Add-Ons available from
Energy Saving Products, see
Module OPT - Options
and Add-Ons
.
Once the return air has been cut out, a transition will be
needed to attach the return air duct to the fan coil
(Fig. 03)
.
Fig. 02 – Return Air using a transition
A round or square return air duct can be used; they must
be sized for the Hi-Velocity Systems according to
Table
01
. Before the return air can be attached to the transition,
the first five feet (from the fan coil) is to be acoustically
lined for sound absorption.
When mounting additional components onto the back of
the unit, (Filter Rack, Return Air Base etc.) the hex head
(a)
screws (4 or 6 depending on unit size) can be replaced with
flat head
(b)
screws for a flush fit.
Mounting Additional Components
