Venting Of Furnace For Indoor Installations - Trane Horizon OABE/F Installation, Operation And Maintenance Manual

Installation
Figure 52.
6. Attach the heater flue to the inducer blower on the
heater and secure with (2) stainless steel self-drilling
screws provided, as shown in
Figure 53.
7. Install the heater door on the unit, as shown in
Figure 54, p. 42, ensuring that the heater flue extends
through the flue opening in the door.
42
Figure 53.
Figure 54.

Venting of Furnace for Indoor Installations

All furnace modules must be vented outside of the heated
space. Vents must be designed and installed in accordance
with ANSI Z223.1. Beyond an equivalent length of 15 feet,
the extension may require power venting. Please refer to
ANSI Z223.1.
Units with dual burners will require separate vents. Dual
burners are included in any cabinet with a 700–1000 MBh
gas heater section, as well as OAK and OAN cabinets with
a 600 MBh gas heater section.
Horizon™ units with gas heat are not designed for sealed
combustion. The unit air intake must be open to
atmosphere for combustion air entering the unit. The unit
should not be placed in a sealed room with ducted outside
air for combustion.
The furnace must be connected to a vent complying with
a recognized standard, or a masonry or concrete chimney
lined with a material acceptable to the authority having
jurisdiction.
The furnace modules will be classified in accordance with
ANSI standards as follows:
• Category I—Non-condensing appliance with negative
vent pressure
• Category III—Non-condensing appliance with positive
vent pressure
Vertically Vented Furnaces—Category I (Refer to
Figure 55)
1. Use single wall or double wall (Type B) vent pipe of a
diameter listed in the following table for the
appropriate model.
2. Maximize the height of the vertical run of vent pipe. A
minimum of 5 ft (1.5 m) of vertical pipe is required. The
top of the vent pipe must extend at least 2 ft (0.61 m)
above the highest point on the roof. Use Listed Type B
vent for external runs. An approved weatherproof vent
cap must be installed on the vent termination.
OAU-SVX004D-EN