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Installation of Return Air Filter Cabinet on Rear or Side of Heater (Option CW8, CW9, or CW10,
Unit Size 150 or 200 Rear Inlet Only)—Continued
EXISTING
SCREWS
FILTER
SUPPORT
CHANNEL
4. Slide filters into filter rack channels.
5. Install door assembly on open end of filter cabinet and secure using sheet metal screws. Fasten door latches.
6. Connect ductwork (refer to
Installation of Bottom Return Air Filter Cabinet (Option CW13, CW14, CW15, or CW16)
NOTE: Options CW13, CW14, CW15, and CW16 are for bottom return air inlet. The cabinets are
shipped separately for field-assembly and installation. The bottom return air filter cabinet supports
the heater and provides a filtered path for vertical return air.
Figure 19. Option CW13, CW14, CW15, and CW16 Configuration
NOTE: Ensure that inlet air opening has been cut in bottom of the heater before it is placed on the
filter cabinet. The cabinet's filter access doors may face either to the front or rear of the heater.
14
INSTALLATION—CONTINUED
TOP PANEL
SHEET METAL SCREWS
Figure 18. Install Rear Inlet Filter Cabinet on Heater
RETURN AIR FILTER CABINET DIMENSIONS
ANY VIEW
INSTALLED ON BOTTOM
(ALL UNIT SIZES)
FILTER SUPPORT CHANNEL
section for duct flange dimensions).
CAUA-CW4-CW16 (02-25) 166162-E
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