508033-02Issue 2135Page 34 of 48
Gas Valve
Air Intake Assembly
*Air Fuel Plenum
Gasket
(replace)
Debri Screen
Air Fuel Plenum
Burner
Heat Exchanger
* Re-install screws per the numbered sequence shown
Gasket
Gasket
Heat Exchanger and Burner Assembly Removal
Figure 21.
Wiring and Sequence of Operation
When there is a call for heat, the Comfort Sync
®
enabled
integrated control runs a self check. The control checks for
S10 primary limit and S47 rollout switch normally closed
contacts. The control also checks for S102 high heat
and S128 low heat prove switch normally open contacts.
Once self check is complete and all safety switches are
operational, heat call can continue.
NOTE: The ignition control thermostat selection DIP switch
is factory-set in the “TWO-STAGE” position.
Electric Shock Hazard. Can cause injury or
death. Unit must be properly grounded in
accordance with national and local codes.re
attempting to service motor. Failure to wait
may cause personal injury or death.
WARNING
Fire Hazard. Use of aluminum wire with this product
may result in a re, causing property damage, severe
injury or death. Use copper wire only with this product.
WARNING
Failure to use properly sized wiring and circuit breaker
may result in property damage. Size wiring and circuit
breaker(s) per Product Specications and unit rating
plate.
CAUTION
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