Installation
40
WSHP-SVX13C-EN
Return-Air Ductwork
The equipment factory ships with the filter rail and filter(s)
installed for free return.
When a ducted return is required, a ducted filter rack or
ducted panel must be installed on the unit.When attaching
the field ductwork to the unit, provide a water tight flexible
connector at the unit to prevent operating sounds from
transmitting through the ductwork. See
Figure 22, p. 40
.
Elbows with turning vanes or splitters are recommended
to minimize air noise due to turbulence and to reduce static
pressure.
Note:
Installation of a return-air ducted panel or ducted
filter rack require the removal of the filter rails.
Return Air Ducted Panel
Ducted panel
The return-air arrangement may be easily converted from
a free return-air system to a ducted return-air system with
the addition of a return-air ducted panel. By replacing the
filter rail with the return-air panel, a complete seal from the
duct to the unit is possible.The 1-inch duct panel facilitates
ease of field connection to the mechanical system. This
accessory is typically used when the return air filter is
placed up stream of the unit or placed within a field
provided filter rack assembly.
Ducted Filter Rack
When it is necessary to have filter access at the unit in a
ducted return, a ducted filter rack is available.This option
allows access to the filter at the unit. Vertical unit filter
racks are available in right or left access configurations.
Horizontal units are available in side or bottom access
configurations.
Figure 21. Flexible supply-air connector (field provided)
Figure 22. Flexible return-air connector (field provided)
SUPPLY-AIR
RETURN
AIR
DUCT COLLAR
(FACTORY PROVIDED)
RETURN-AIR BOOT
(FIELD PROVIDED)
DUCT COLLAR
Figure 23. Ducted panel
Table 36. Return air ducted panel (horizontal only)
Unit
A B
Part
Number
024, 033
31.5”
19.2”
4476 0334 0100
042, 050, 060
51.1”
19.2”
4476 0335 0100
Figure 24. Ducted filter rack
Table 37. Ducted filter opening size
Unit
A B
C
VSH 024, 033
35.8”
20.2”
5.5”
VSH 042, 050, 060
54.8”
20.2”
5.5”
A
B
Содержание Axiom VSHE024
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