Help replacing old Janitrol thermostat with new LUX


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Old 02-15-11, 01:04 PM
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Help replacing old Janitrol thermostat with new LUX

I have a Janitrol HPT18-60 that I am wanting to replace with a new LUX TX9000TS. I'm having some issues with the conversion.

Currently the Janitrol has:

Y
G
R
O
W2
E
C
(all have wires attached with one additional wire not being used, and there are NO jumpers)



The new LUX has:

W
Y
G
B
O
RC
RH
C
(here the RC is jumped over to the RH)



I don't know if the LUX I bought is not compatible or what, as the more I research this I'm getting the feeling I have a two stage heat pump because of the emergency heat switch? Whereas this LUX model is only for single stage heat pumps.

If more information is needed please let me know and I'll try to get that back to you.

Thanks in advance.
 

Last edited by MG2011; 02-15-11 at 02:55 PM.
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Old 02-15-11, 04:35 PM
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you do not have the correct stat as you were thinking, you need a 2 heat 1 cool thermostat (heat pump with aux[back-up] heat)
 
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Old 02-15-11, 08:15 PM
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As said, this won't work.

Also, when you return this, get a real stat like Honeywell RTH7500 or RTH7600.
 
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Old 02-15-11, 08:30 PM
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Thanks for the replies and advice. So Honeywell is the way to go? The only reason I got the LUX was because of Consumer Reports recommendation.

I will defer to your advice, but out of curiosity why? Just from your experiences?

Is the only difference between the 2 that one is touchscreen and one isn't?

Thanks again, both of you who responded.
 
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Old 02-15-11, 08:39 PM
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Yes. Honeywell been making t-stat for a very long time, and they know what they are doing.

Lux is "cheap" and you can't always trust CR.

Yes, one is touch, and other is not.
 
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Old 02-15-11, 08:47 PM
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Ok, one other question. While doing some research I read some things about units that are capable of switching from heat to cool automatically, and vice versa, and that feature being not so economical as it could constantly fight against itself. Is this real, imagined, or a non-factor when it comes to one of your advised units?
 
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Old 02-16-11, 04:01 AM
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I do not like auto changed over.... In order for this to work there is what is called deadband. Deadband is the difference that must be between the temp setting for heating and cooling. Where it becomes a hassle is when you change one temp, depending which one and which way you are changing it up or down, it will change the other temp as well. This function generates a lot of thermostat calls to our office, so we disable that function whenever possible.
 
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Old 02-16-11, 04:20 AM
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Right, and I don't want this feature. Does the Honeywell RTH7500 or RTH7600 have that feature, because I can't see any description online that says it does or don't.
 
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Old 02-16-11, 04:31 AM
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I don't believe so and if they do, you can typically disable it on HW stats
 
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Old 02-16-11, 05:23 AM
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I agree, I'm not crazy about it.. Guess I'm these person who opens the window when you have that in between temps.

The stat has this "AUTO" options. but you have to turn it on if you want it. So just leave it on the default "Off".
 
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Old 03-07-11, 02:08 PM
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Hi guys, I received the RTH7600 and hooked it up. It is functioning properly, thanks for the help. Did I see somewhere that there is the ability to hook it up to save settings without the usage of battery if I have an unused wire available?
 
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Old 03-07-11, 03:47 PM
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you must have C hooked up for that
 
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Old 03-07-11, 04:30 PM
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Can you be more specific? I have one available wire, how can I know it goes where it needs to be on the other end?
 
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Old 03-07-11, 04:33 PM
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follow the wires into your furnace or Air Handler and find that extra wire. Do you have anything hooked to C on the stat currently?! C is common or ground of your air handler or furnace.
 
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Old 03-07-11, 04:43 PM
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Yes, I'm sorry. I currently have a wire hooked into C.
 
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Old 03-07-11, 05:18 PM
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then you should be good to go, remove batteries and see if thermostat still works.......
 
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Old 03-07-11, 06:58 PM
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Ok, got it. It does work without the batteries. I think I'll use batteries though as the manual says nothing about the internal lithium battery holding the settings if power is ever lost.

One other curiosity. Why would someone want to run the system fan "On" full-time?
 
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Old 03-07-11, 08:05 PM
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evens temps throughout the home. it constantly filters the air.
 
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Old 03-07-11, 08:25 PM
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Well thanks for all the replies. I think I'm all set!
 
 

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