Vii- Wiring And Sequence Of Operation - Lennox SL280UHNV Series Manual

VII- Wiring and Sequence of Operation

When there is a call for heat, the iComfort® enabled in-
tegrated 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 opera-
tional, 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.
Fire Hazard. Use of aluminum wire with this product may
result in a fi re, causing property damage, severe injury
or death. Use copper wire only with this product.
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WARNING
WARNING