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Combustion Air Filter
This heater is supplied with an integral combustion air filter. This filter will reduce the amount of particulates passed through the combustion system and heat exchanger but will not protect against chemical inside air contamination (See Appendix). The filter must be checked periodically to verify that adequate combus- tion air is being supplied to the heater. See the Maintenance section of this manual for information on checking the filter and establishing service intervals.
Direct Vent
If outside air is drawn through the intake pipe directly to the unit for combustion:
1.Convert the unit to draw air through an air intake duct at the rear of the cabinet. As shipped, XTherm heaters draw combustion air from inside the cabinet.
2.Turn off all power to the heater.
3.Ensure that the heater is cool to the touch before proceeding with the installation.
4.Remove both the left and right rear side access panels.
Inside Air Intake |
Opening |
Fig. 7: Remove the Rear-side Access Panels
5.From the
Inside Air Intake |
Cover Panel |
Fig. 8: Install the Inside Air Intake Cover Panel
6.
Condensate |
Drip Pan |
Fig. 9: Install the Condensate Drip Pan |
7.Remove the air intake cover panel by removing the 5 phillips head screws holding it in place.
Air Filter
Access
Panel
Air Intake
Cover Panel
Fig. 10: Remove the Air Intake Cover
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