Proportional Band Width


  #1  
Old 12-04-02, 01:13 PM
Simon Luce
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Question Proportional Band Width

Hi

I've just installed a Honeywell CM67 room thermostat. Does anyone know how to set the Proportional Band Width parameter?
It says in the manual that it provides better temperature control and ranges from 1.5 to 3.0 degrees C, but it doesn't say in any detail on setting this up.

Any ideas?
 
  #2  
Old 12-04-02, 02:26 PM
bigjohn
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Recheck the number. Honeywell thermostat model numbers begin with a T. Proportional band width is probably a fancy way to say differential. If you can get me the right number, I can get the literature from Honeywells' website and come up with an answer. I tried CM67 and got no results.
 
  #3  
Old 12-04-02, 02:30 PM
Simon Luce
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Hi

It's a T6667b1069
 
  #4  
Old 12-04-02, 03:06 PM
bigjohn
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I'm afraid I've drawn a blank with that number. It's not at the literature website or in the catalog. The first 6 would indicate that it's line voltage, single pole/double throw. Which continent are you on?
 
  #5  
Old 12-04-02, 06:56 PM
GregH's Avatar
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Thumbs up Nice thermostat!

Simon Luce:

Your numbers are all correct.

Where do you live?
You have a European thermostat.

http://europe.hbc.honeywell.com/home/roomandzone/chronotherm.htm

I have only seen bandwidth adjustments on DDC controllers and advanced commercial equipment.

It probably would act like a differential control on your thermostat.

The lower the number, the shorter the cycles = tighter control but more on/off cycling.
 
  #6  
Old 12-05-02, 10:33 AM
Simon Luce
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Thanks for the info guys, now I know what that does. It is a european model, I'm in England.
 
  #7  
Old 12-05-02, 11:17 AM
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Glad to have helped.

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