I have an Omnistat2 RC-2000 thermostat controlling a HVAC system composed of a Carrier single-stage heat pump, dual-stage forced air furnace on a house with an Omni IIe control system. Temperature is programmed to 62F night/70F day. When outside temperature is below the lower balance setpoint (30 F), the auxiliary heat does not come on in the morning consistently and raise the temperature to the daytime setpoint, even though the setpoint on the thermostat shows the correct setpoint of 70F. However, the auxiliary heat comes on when I manually increase the setpoint to 73F, which seems to indicate the system is connected correctly and that the problem is with the thermostat settings. Likewise, temperature is maintained at the lower setpoint even when outside temps are cold, showing that it's able to maintain temperature with auxiliary heat. There are no problems when outside temperature is above the lower balance setpoint.
I've tried changing the EEC and anticipator controls, but haven't been able to resolve the problem. Any suggestions or troubleshooting advice would be appreciated. I've included the current settings below.
Thanks,
Tim
No internal programming
Cool min on - 7
Cool min off - 8
Heat min on - 7
Heat min off - 8
Cool stages - 1
Heat stages - 3
Heat eec - 4
Cool eec - 5
2nd stage differential - 1
start delay - 5 min
aux heat differential - 2
start delay - 15 min
Cool anticipator - 5
heat anticipator - 4
2nd/3rd stage extended on - on
balance setpoint - upper=70F, lower=30F
I've tried changing the EEC and anticipator controls, but haven't been able to resolve the problem. Any suggestions or troubleshooting advice would be appreciated. I've included the current settings below.
Thanks,
Tim
No internal programming
Cool min on - 7
Cool min off - 8
Heat min on - 7
Heat min off - 8
Cool stages - 1
Heat stages - 3
Heat eec - 4
Cool eec - 5
2nd stage differential - 1
start delay - 5 min
aux heat differential - 2
start delay - 15 min
Cool anticipator - 5
heat anticipator - 4
2nd/3rd stage extended on - on
balance setpoint - upper=70F, lower=30F