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Old 02-10-2010, 08:03 AM   #16
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


Thanks. That is good to know that removing the W wire won't harm anything. Plus I can always hook it back up if I think it gets to cold during defrost.

Yes I can get it into the air handler with no problem. If I read the manual right it needs 2 wires for the sensor and connect it to S1 and S2 at the tstat? I would need to run 2 wires from the t-stat to the air handler but that is no problem. So basically the 2 wires from the sensor connect to my new 2 wire t stat wire and connect to S1 and S2 at t stat?
Also if I do wire in the sensor would I go into 340 and set it to #2 (outdoor control sensor, select heat pumps)?

What in your opinion is the best solution? 1. Getting the IAQ when I can afford it and turning off the aux. heat (by selecting 1h/1c no aux) and defrost (disconnect W wire) until I can change t-stats?

2. Keeping the 8320 and wiring in the sensor in the return air and setting it for 60 and I would still disconnect the W wire at the outside unit to stop the aux. in defrost.

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Old 02-10-2010, 09:04 AM   #17
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


When you install the sensor. Don't run the stat wire for it near any high voltage wires, it will interfere with the stat.

I would keep the 8320. Unless you have a VS blower.

340 gets set to 2.

If you find that having the sensor in the duct, and the lock out set to 60 allows your house to get too cold.

Then lie to the stat. By adding a 1500OHM resistor in series with the temp sensor, and it will think its 60 when its 65. Or add a 2000OHM, and it will think its 60 when its 67.
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Old 02-10-2010, 11:51 AM   #18
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


Thanks. That is excellent info.

Would you wire the resistor inline on 1 wire going to S2 or would I need to wire in 2 resistors one in each line. 1 for S1 and 1 for S2.

Does my wiring look correct? Thanks Again.
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Old 02-10-2010, 01:54 PM   #19
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


Thats the correct way in he drawing.
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Old 02-10-2010, 03:15 PM   #20
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


Great. Thanks. I appreciate it. I went home for a minute and checked the t-stat settings.

0170 is set to : 7
0200 : 0
0220 : 3
0240 for some reason wasn't listed
0250 : 9
0270 : 9

So I think I need to change 0270 to 2 and 0250 to 4 right?

When I removed the t-stat I couldn't find a W3. I have a W2 that my Aux is on. Is there another letter it could be or another place to switch it to?

So, my plan is to take your advice and get the outside sensor, put it in the return air and continue to use my 8320.
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Old 02-10-2010, 03:24 PM   #21
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


240 is if you have a dual fuel system.
You can set 220 to 3 or 4. 4 won't bring in aux as quick as 3.
set 250 to 2
270 to 3

Ooops. The 8320 doesn't have W3. The IAQ does.
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Old 02-10-2010, 03:33 PM   #22
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


220 says 1st stage compressor cyc. rate : is that for the compressor when it is on air conditioning or does that include heat also for heat pump?

250 says second stage heat cycle rate so is this my heat pump cycles or aux cycles?

270 is emergency heat cycle this is aux heat strips cycle?

I just want to make sure I got this 100%. '

Is there any place else to move the aux heat or just leave it on W2? Thanks AGain.
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Old 02-10-2010, 03:42 PM   #23
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


Quote:
Originally Posted by twilightcall View Post
220 says 1st stage compressor cyc. rate : is that for the compressor when it is on air conditioning or does that include heat also for heat pump?

For both heat and cooling.

250 says second stage heat cycle rate so is this my heat pump cycles or aux cycles?

Aux heat. Your first stage heat is your heat pump.

270 is emergency heat cycle this is aux heat strips cycle?

Although they are one in the same heat strips in the air handler. They can be set for different cycle rates. Since emergency heat is done/controlled from the E terminal.

I just want to make sure I got this 100%. '

Is there any place else to move the aux heat or just leave it on W2? Thanks AGain.
No other place on that stat.
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Old 02-10-2010, 03:51 PM   #24
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


Ok so 250 and 270 are the same but you can set them for different cycles but they still run the aux. heat?

Do you have any special resistor you like to use or is radio shack etc. fine?
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Old 02-10-2010, 04:02 PM   #25
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


250 controls aux/W2 terminal.
270 controls the E terminal.

If you don't have a wire on the E terminal(or a jumper from aux to E), you don't have emergency heat.

No special resistor needed. Radio Shack is fine.
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Old 12-27-2010, 07:19 PM   #26
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


I've been having the same issue with my heat pump. The aux heat comes on too much and is jacking up my electric bill. I have an Armana heat pump and a Honeywell RTH2510 stat. I'm trying to figure out how to use the aux heat less. My aux heat is attached to W on the t-stat. Can I just disconnect this and eliminate the aux heat?
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Old 12-27-2010, 07:38 PM   #27
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


Quote:
Originally Posted by wkumtrider View Post
I've been having the same issue with my heat pump. The aux heat comes on too much and is jacking up my electric bill. I have an Armana heat pump and a Honeywell RTH2510 stat. I'm trying to figure out how to use the aux heat less. My aux heat is attached to W on the t-stat. Can I just disconnect this and eliminate the aux heat?
If you want to, sure. The heat pump alone might or might not heat your house to the desired temp when it gets cold out though.
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Old 12-27-2010, 08:04 PM   #28
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


Wku, Before you unhook your aux. heat I would compare usage to last year. Elec. rates have went up. JMO
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Old 12-27-2010, 08:31 PM   #29
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


Quote:
Originally Posted by wkumtrider View Post
I've been having the same issue with my heat pump. The aux heat comes on too much and is jacking up my electric bill. I have an Armana heat pump and a Honeywell RTH2510 stat. I'm trying to figure out how to use the aux heat less. My aux heat is attached to W on the t-stat. Can I just disconnect this and eliminate the aux heat?
Are you setting the temp back at night, and or when you go to work, and then having it recover to a higher temp. Don't do that with a heat pump.

Or is it just coming on during normal heat calls?

Could be your heat pump can't maintain temp at your current outdoor temps.
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Old 12-27-2010, 09:21 PM   #30
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How to stop auxillary heat from coming on defrost cycle and limit auxillary heat use?


Right now I do have the t-stat programmed to change throughtout the day. At night it goes down to 62, stays that way all day while we are gone, and jumps up to 67 around 6:00 Pm when we return home. However, aux heat always comes on during normal heat calls. Temps right now are around 20 at night and 30-31 during the day. The bill is much higher than last year. Last year I also had a Rite Temp t-stat that did not use the aux heat nearly as much as the current honewell. Replaced the Ritetemp because touch screen went out.

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