Support
frame
Support
frame
Support frame
Support
frame
63-5/8"
2-11/16"
A
B
2-1/4"
C
E
D
1-1/4"
F
1-1/4"
D
E
3"
Throwaway
filter
Swage
Front view
3-1/2"
3"
57-1/8"
88"
104" -115"
2-11/16"
5"
1-3/8"
5"
1-1/4"
18"
37 1/2"
5-3/4"
55-3/16"
(Door 53-3/4")
13" - 24"
Piping
range
Control
box
Front
access
panel
“P” trap
Outside
air damper
Motor
blower
Valve
package
Cooling/
heating coil
Heating coil
Drain pan
Side view
5/8" Type “X”
drywall
4-3/8"
4-3/8"
2-1/2"
2-1/2"
2-9/16"
1-9/16"
2-3/8"
Hr
Hs
D
Cr
Cs
4-pipe system
5/8" Type “X” drywall
2-9/16"
6"
F
C
1-9/16"
2-3/8"
5/8" Type “X” drywall
2-pipe system
R
D
S
42"
G
C
Dimensions and data
Model FVA/FVB: Back to back
Dimensional data
Unit Size
A
B
C
D
E
F
G
03, 04, 06
18 12-1⁄2 14
12
6
2
2
08, 10, 12
24 18-1⁄2 16
14
7
4
1
Acceptable riser combinations
Supply & Return
(Insulation)
Condensate
(Insulation)
≤2-1⁄2" (1⁄2")
≤3⁄4" (1⁄2")
≤2" (1⁄2")
≤1" (1⁄2")
≤2" (1⁄2")
≤1-1⁄2" (1⁄2")
≤1-1⁄2" (3⁄4")
≤3⁄4" (1⁄2")
≤1-1⁄4" (3⁄4")
≤1" (1⁄2")
≤1" (3⁄4")
≤1-1⁄4" (1⁄2")
≤1-1⁄4" (3⁄4")
≤3⁄4" (3⁄4")
≤1" (3⁄4")
≤1" (3⁄4")
Notes:
All dimensions are in inches
All dimensions are +/- 1/4"
Wiring from electrical entry point to control enclosure is furnished
and installed by others in field
Risers available from 3/4" to 2-1/2" diameter with 1/2" or 3/4" thick
insulation
Riser length is 104"-115" standard
Back riser location shown. See arrangement drawings for available
unit configurations.
Factory mounted risers shown
Outside air damper opening is located on left or right side of unit
All listed dimensions are approximate and are subject to change
without notice. Modifications to the product specifications must be
accepted by Zehnder Rittling at its base office.
Left: 08-12 blower/motor,
viewed from front
Above: 03-06 blower/motor,
viewed from front
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