Trane Horizon OABD, Installation, Operation And Maintenance Manual

Page: 23 / 64

Installation
OAU-SVX02F-EN 23
OAB and OAG IF Heater Air Inlet Hood and
Flue Assembly Instructions
Unit is shipped with the IF heater air inlet hood and flue
cover stowed in the blower compartment.
Important: Assemble the inlet hood and flue cover to
the heater door
before attempting any unit
startup.
1. Open the blower compartment and remove the flue
cover, wind screen, and heater air inlet hood.
2. Open the control panel door and remove the heater
door shown in Figure 19 .

Assemble and install the roof curb (if applicable).
Refer to the latest edition of the curb installers guide
that ships with each curb kit. Check curb for level
installation; if not level, shim as required.

Convert unit to horizontal discharge and/or horizontal
return if necessary (Refer to
“OAB and OAG IF Heater
Air Inlet Hood and Flue Assembly Instructions,” p. 23 ).

Rigging unit (refer to “Unit Weight and Rigging,”
p. 19 ).

Set the unit onto the curb; check for level.

Ensure unit-to-curb seal is tight and without buckles
or cracks.

Install and connect proper condensate drain line to
the evaporator condensate pan drain connection (see
Figure 24, p. 25 ).

Assemble indirect fired heater air inlet hood and flue
assembly (refer to
“OAB and OAG IF Heater Air Inlet
Hood and Flue Assembly Instructions,” p. 23 .)
Figure 16. Flue cover
Figure 17. Wind screen
Figure 18. Heater air inlet hood
Figure 19.
Control
panel
door
Heater
door