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Re: York Heat Pump and furnace both run at the same time..is this normal?

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Re: York Heat Pump and furnace both run at the same time..is this normal? kool 11-15-2007
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Posted by kool on November 15, 2007, 1:44 pm

>
> I have a York combination system with an oil fired furnace and a heat
> pump. Everything is working fine but I have a question about how the
> heat pump and furnace work together.
>
> The thermostat is a 2 stage, when the first stage calls for heat, the
> heat pump alone comes one. If the room temperature drops another
> degree or so, the second stage calls for heat also and the furnace
> then comes on. Here is where my question comes in. When the second
> stage calls for heat and the furnace comes on, the heat pump
> compressor still remains on. As the furnace heats up, the heat pump
> condenser input air is getting hotter and hotter. The heat pump is
> trying to heat air that has already been heated by the furnace. At
> some point when the furnace warms up enough, the heat pump does
> eventually shut off , but it seems that it is shutting off due to a
> high pressure safety or something and that the line pressure is very
> high at that point. I imagine I can hear the compressor straining to
> pump heat into the already heated air and I'm thinking this can't be
> good for the compressor.
>
> Is it normal for a dual system to be designed so that the heat pump
> and furnace both are operating at the same time or should the controls
> be wired to turn the heat pump off immediately when the furnace comes
> on for second stage?
>
> thanks
>
> Mark

It's wired wrong , they should NOT both run at the same time. Get the
installer back ASAP to correct the situation and shut off the HP until it's
fixed.Switch the T-stat to the Emerg.Heat position and leave the main power
on to the compressor



Radiant Heat 468x60
Posted by PrecisioNmachinisT on November 15, 2007, 3:00 pm

>
> >
> > I have a York combination system with an oil fired furnace and a heat
> > pump. Everything is working fine but I have a question about how the
> > heat pump and furnace work together.
> >
> > The thermostat is a 2 stage, when the first stage calls for heat, the
> > heat pump alone comes one. If the room temperature drops another
> > degree or so, the second stage calls for heat also and the furnace
> > then comes on. Here is where my question comes in. When the second
> > stage calls for heat and the furnace comes on, the heat pump
> > compressor still remains on. As the furnace heats up, the heat pump
> > condenser input air is getting hotter and hotter. The heat pump is
> > trying to heat air that has already been heated by the furnace. At
> > some point when the furnace warms up enough, the heat pump does
> > eventually shut off , but it seems that it is shutting off due to a
> > high pressure safety or something and that the line pressure is very
> > high at that point. I imagine I can hear the compressor straining to
> > pump heat into the already heated air and I'm thinking this can't be
> > good for the compressor.
> >
> > Is it normal for a dual system to be designed so that the heat pump
> > and furnace both are operating at the same time or should the controls
> > be wired to turn the heat pump off immediately when the furnace comes
> > on for second stage?
> >
> > thanks
> >
> > Mark
>
> It's wired wrong , they should NOT both run at the same time. Get the
> installer back ASAP to correct the situation and shut off the HP until
it's
> fixed.Switch the T-stat to the Emerg.Heat position and leave the main
power
> on to the compressor
>

Leave mains power to the compressor on ?

--



Posted by Noon-Air on November 15, 2007, 3:21 pm

>
>>
>> >
>> > I have a York combination system with an oil fired furnace and a heat
>> > pump. Everything is working fine but I have a question about how the
>> > heat pump and furnace work together.
>> >
>> > The thermostat is a 2 stage, when the first stage calls for heat, the
>> > heat pump alone comes one. If the room temperature drops another
>> > degree or so, the second stage calls for heat also and the furnace
>> > then comes on. Here is where my question comes in. When the second
>> > stage calls for heat and the furnace comes on, the heat pump
>> > compressor still remains on. As the furnace heats up, the heat pump
>> > condenser input air is getting hotter and hotter. The heat pump is
>> > trying to heat air that has already been heated by the furnace. At
>> > some point when the furnace warms up enough, the heat pump does
>> > eventually shut off , but it seems that it is shutting off due to a
>> > high pressure safety or something and that the line pressure is very
>> > high at that point. I imagine I can hear the compressor straining to
>> > pump heat into the already heated air and I'm thinking this can't be
>> > good for the compressor.
>> >
>> > Is it normal for a dual system to be designed so that the heat pump
>> > and furnace both are operating at the same time or should the controls
>> > be wired to turn the heat pump off immediately when the furnace comes
>> > on for second stage?
>> >
>> > thanks
>> >
>> > Mark
>>
>> It's wired wrong , they should NOT both run at the same time. Get the
>> installer back ASAP to correct the situation and shut off the HP until
> it's
>> fixed.Switch the T-stat to the Emerg.Heat position and leave the main
> power
>> on to the compressor
>>
>
> Leave mains power to the compressor on ?

yup.... compressor heater.



Posted by PrecisioNmachinisT on November 15, 2007, 3:51 pm

>
> >
> >>
> >>
> >> >
> >> > I have a York combination system with an oil fired furnace and a heat
> >> > pump. Everything is working fine but I have a question about how the
> >> > heat pump and furnace work together.
> >> >
> >> > The thermostat is a 2 stage, when the first stage calls for heat, the
> >> > heat pump alone comes one. If the room temperature drops another
> >> > degree or so, the second stage calls for heat also and the furnace
> >> > then comes on. Here is where my question comes in. When the second
> >> > stage calls for heat and the furnace comes on, the heat pump
> >> > compressor still remains on. As the furnace heats up, the heat pump
> >> > condenser input air is getting hotter and hotter. The heat pump is
> >> > trying to heat air that has already been heated by the furnace. At
> >> > some point when the furnace warms up enough, the heat pump does
> >> > eventually shut off , but it seems that it is shutting off due to a
> >> > high pressure safety or something and that the line pressure is very
> >> > high at that point. I imagine I can hear the compressor straining to
> >> > pump heat into the already heated air and I'm thinking this can't be
> >> > good for the compressor.
> >> >
> >> > Is it normal for a dual system to be designed so that the heat pump
> >> > and furnace both are operating at the same time or should the
controls
> >> > be wired to turn the heat pump off immediately when the furnace comes
> >> > on for second stage?
> >> >
> >> > thanks
> >> >
> >> > Mark
> >>
> >> It's wired wrong , they should NOT both run at the same time. Get the
> >> installer back ASAP to correct the situation and shut off the HP until
> > it's
> >> fixed.Switch the T-stat to the Emerg.Heat position and leave the main
> > power
> >> on to the compressor
> >>
> >
> > Leave mains power to the compressor on ?
>
> yup.... compressor heater.
>

Okay thx threw me off there a sec..

--




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