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30
10.9.1
ROUTING OPTIONS
This furnace must be installed in the upfl ow position only. Figure 22 on the following page shows the three vent
installation positions. The installer must consider the following services: gas pipe, electrical power, drain trap,
intake and exhaust vents. Also consider the air conditioning connections and drain, access to
fi lter(s) and access to furnace and a/c for repair. Drains and traps of furnaces installed in spaces
subjected to freezing temperature must also be protected against freezing.
The combustion air inlet fi tting is a 2" PVC Socket to Pipe Thread adapter. Choose the intake
location and remove the appropriate plastic cap. Install the adapter to the exterior panel using the
gasket (on the outside of the panel and the locknut on the inside of the panel).
10.9.2
EXHAUSTER ROTATION INSTRUCTIONS & PRESSURE SWITCH
MOUNTING
1. Disconnect exhauster wire connection.
2. Remove the 3 exhauster screws.
3. Remove pressure switch assembly (switches) and front manifold cover pressure sensing hose.
4. Remove exhauster.
5. Reverse the bands on the rubber drain coupling so the screws are accessible if necessary. (Do not
reverse the drain coupling.) Confi rm that directional arrow on drain coupling points away from exhauster.
6. Remove the appropriate plastic cap on the side panel. Install cap on vent opening not in use.
7. Reinstall the exhauster and the pressure switch assembly in the correct orientation with the (3) exhauster
screws removed in step 2. Reinstall the pressure switches so that they are above the heat exchanger
drain, to eliminate the chance of condensate draining into the pressure switch sensing hose causing
erratic furnace operation. See Figure 22 for reference.
8. Rotate the drain coupling so the drain holes are angled downward 15° and tighten coupling band to
exhauster.
9. Complete the venting as installation requires.
Always secure or support the vent and intake to the fl oor joists or rafters to avoid sagging and possible fatigue
of venting materials. This ensures proper drainage and prevents spilling the products of combustion into the
building.
The blower compartment should be completely isolated from the burner compartment, and in tight rooms
with other combustion devices, be completely isolated from the room (unless indirect vent). Ensure that the
combustion door gasket is in good condition.
IMPORTANT:
KEEP PRESSURE SWITCH HOSES ABOVE HEAT
EXCHANGER DRAIN, AND CUT TO APPROPRIATE
LENGTH TO PREVENT ANY SAGS OR TRAPS
FORMING IN THE HOSES.
TABLE 5
ORIENTATION
FURNACE
FLUE
Up
Left
Up
Right
Up
Vertical
W415-1064 / 11.11.11
ROTATE
SEE FIGURE 22
EXHAUSTER
FOR
Y
RECOMMENDED
Y
MOUNTING
N
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