Thermostat - Can I change cycle times?

dncps

I have an older gas furnace with a new digital non-programmable Honeywell Thermostat. The thermostat comes default set at 4 (Four 15 minute per hour cycles). The problem is that I would like to adjust the furnace so that it turns-on less frequently than it currently does. The manual states for gas furnaces that 4 is the proper setting. Can I set it for "3" (20 minute cycles) so that the furnace does not turn-on as frequently? Could this cause furnace problems?

It's not clear to me the relationship between the cycle times selected and the set point chosen. Does the cycle time setting limit the # of times that the thermostat will turn on the heater within a 60 min period? Is this independent of set point? BTW this thermostat does not have a clock. It's very basic but does have the option to change cycle times.

Thank you

Kevin_in_Denver_2

Cycles per Hour vs. deadband

There's a thread on this subject already, and we're trying to figure out the answer to your question.

Chances are you won't see much difference in performance going to 3 cph from 4 cph. Try 1 cph or 2 cph, and tell us what you notice. The temperature swing should increase somewhat, and theoretically, the bigger the swing, the more efficient the system.

dncps

Thermostat - Can I change cycle times?

Thanks. Then, it's ok to try the different cycle settings.
I take it the CPH setting has no effect on the electrical ability of the thermostat to turn-on or turn-off the furnace, only on how often it does such.

Yes, when you obtain some information regarding the theory of operation: cph vs set point, etc., that would be great.