Heat pump thermostat settings?

hunterdan

hunterdan

Well-Known Member
Joined
Apr 13, 2009
Location
Morganton,NC
I replaced the battery in my thermostat. While trying to remove trim that blocks battery door I accidentally knocked the thermo loose from its wired connection as d lost all settings.
Nothing got damaged....
I reinstalled the Honeywell 5000pro thermo and all is back connected.
My question is what cycles should I set it on?
In section one of the system programming there is a setting for 1 heat1cool, 2 heat 1 cool etc.

My heat pump is a Bosch bova 36 and it has an inverter compressor which ramps up and down as required.
I believe it's a 1st phase heat and cool and a second phase heat and cool with emergency heat strips.
That leads me to believe it should be on 2 heat 2 cool #6.
What say you guys? Which in attachment for #1 would you pick?
AC guy has me on his list to service whenever....

Thanks
 

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A Honeywell stat doesn't lose its settings with no power, but it can be one or two stage depending on how the installer wired the thermostat. If there's a w2 wire then set it for 2 stage heat. Also Bosch is one of the few mfrs that energize the reversing valve in heat instead of cool so you'll have to change setting 2 too or you won't have cold air.
 
braxton357 said:
A Honeywell stat doesn't lose its settings with no power, but it can be one or two stage depending on how the installer wired the thermostat. If there's a w2 wire then set it for 2 stage heat. Also Bosch is one of the few mfrs that energize the reversing valve in heat instead of cool so you'll have to change setting 2 too or you won't have cold air.
Click to expand...
Thanks for the help.
I forgot to mention this system is a dual zone with 2 blend doors.
I also forgot to mention that this thermostat has no setting above #8. I had it on #6 and the house is holding at 72 degrees.
After your comment I changed the #2 setting to heat valve changeover (in heat)
and set the system to 2 heat 1 cool (with auxiliary heat)
I don't know if this Bosch has need of phases as I think the board ramps up and slows motor automatically on demand? Anyway it's set on #5 for system (1)
 
Well....it's struggling again with outside temps.of 87-90. Thermo set at 72 and it reaches 74-75.
I had a fella look at the system.
Ok ...he says freon good and all checks out good except the unit is set at 2 ton.
There is a dip switch that has to be set for 2 or 3 ton. It's set for 3 ton but won't ramp up past 2 ton
Basically this inverter should go from like 10 percent ton110 percent when demanded.

Any ideas as to what would cause it to stay in 2 ton model?
Thanks
 
I have an old thermostat and I called my guy and he said its probably going bad and to put a good thermometer inside to get a good reading of actual temp. Seems its off about 3 degrees. I told him that it seems to take forever for the thermostat to trigger the system to start and he said it needs a hard start solenoid (I think that's what he called it) It's for older units.
I know this doesn't answer your question directly but maybe indirectly could help lead to a resolution.
 
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