Original message
| csmpez
 |  "Trane XR90 Gas Furnace & Honeywell 8320 Stat."
, posted Wed 16 Jan 16:29  
I recently replaced the builder's generic first floor T-Stat with a Honeywell 8320 and I really like it. The first floor has a Trane XR90 gas furnance that supplies the heat and I've been letting the T-Stat do its thing with the preprogrammed schedules (wake 68, leave 60, return 68, sleep 60), however, I've noticed that we I get home at 7pm the heat is still running and the temperature is only 64-65 degrees. This is after the system switches over to 68 degrees at 6pm. Now I do have a pretty large home, but I don't think it should take 2 hours of constant run time to go from 60 to 68 degrees. I took a temperature reading of the air coming out of some of the registers and it was 98 degrees. One room in particular gets warmer then most, which is the side sunroom, which has six registers. I heard it is not a good idea to shut registers with a heat pump system... is this true? Should I just set the temperature to 68 degrees all the time and just leave it? When I think of it, to have the heat run during short spurts, is this more economical then having it low during the day and then kicking up to say 68 degrees a couple hours before we get home. The difference, short spurts during the day -vs- a long run time in the evening to get up to comfortable temperature. I want to keep the home warm, but at the same time I want to conserve my Liquid propane useage. Any suggestions? Thanks.
Scott
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Replies:
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| acefurnacefxr
| "Re(1):Trane XR90 Gas Furnace & Honeywell 8320" , posted Thu 17 Jan 07:32
The stat has "adaptive intellegent recovery" It achives the 60 to 68 in incriments instead of all at once, thats why its taking so long. It can be turned off in the bios settings.
HVAC REPAIR IS NOT A DIY WEEKEND PRODJECT
I have been performing HVAC repairs for 23 years
http://www.hillaryclinton.com
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| | csmpez
| "Re(2):Trane XR90 Gas Furnace & Honeywell 8320" , posted Thu 17 Jan 13:36
Incriments??? I understand adaptive intelligent recovery, but I thought that was a function of the T-Stat where it adapts to when you want a certain temp and a certain time. Basically, it comes on earlier to ensure the temp is at the set point by its scheduled time... am I missing something? I'm not sure I understand the "incriments" theory, as the heat stays on until it reaches its set temp point for its set time (6:00pm)... but I've come home at 7:30pm and it still has not reached its set point for 6:00pm of 68 degrees. Seems odd to me.
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| | acefurnacefxr
| "Re(3):Trane XR90 Gas Furnace & Honeywell 8320" , posted Thu 17 Jan 19:40
my defanition musta been over your head, for that i am sorry
HVAC REPAIR IS NOT A DIY WEEKEND PRODJECT
I have been performing HVAC repairs for 23 years
http://www.hillaryclinton.com
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| | csmpez
| "Re(4):Trane XR90 Gas Furnace & Honeywell 8320" , posted Tue 22 Jan 12:44:
No, but the definition you gave for Adaptive Intelligent Recovery is different then what's in the User's Manual. It states: This feature allows the thermostat to "learn" how long the furnace and air conditioner take to reach programmed temperature settings, so the temperature is reached at the time you set. For example, set the wake time to 6am, and the temperature to 70 degrees. The heat will come on BEFORE 6am, so the temperature is 70 degrees by the time you wate at 6am. The message "Recovery" is displayed when the system is activated before a scheduled time period. Hopefully this isn't over your head.
What does this have to do with incriments? The heat doesn't go off and on in incriments to reach the set temperature point, it stays on continuously until the set temperature point is reached. I was just inquiring into why it is taking so long to reach. If you were referring to incriments as 62, 63, 64, 65, 66, 67 degrees and so on, in incriments yeah, I got that all thermostats do that. ;)
[this message was edited by csmpez on Tue 22 Jan 12:49] |
| | static
| "Re(3):Trane XR90 Gas Furnace & Honeywell 8320" , posted Thu 17 Jan 17:19
Did you say heat pump?
Maybe the thermostat is trying to recover with first stage (heat pump) and trying to avoid calling for the back-up.
Eight degrees is an awful deep setback for a heat pump. Three or four is probably the most a heat pump would be able to recover from without several hours of runtime.
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| | csmpez
| "Re(4):Trane XR90 Gas Furnace & Honeywell 8320" , posted Tue 22 Jan 12:51
It's a LP gas furnance, no back up.
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