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Two Stage gas furnace. No literature. What is sequence of operation for staging? Notes on diagram state w1, w2 jumpered brings high fire after 10 min. Is there a dip for 1 or 2 stage operation? m/n TUD120A960A1
 

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there are dip switch settings for 2 stage operation through a thermostat, i don't have them though.

Also, if W1 and W2 are energized at the same time even when set for using a 2 stage thermostat, it will wait 10 minutes before going to second stage.
 
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