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Old 09-28-2010, 10:24 AM   #1
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Honeywell HR200B Unit Fan Interlock

I just installed a Honeywell Ventilation Unit HR200B. I would like to have it come on with the fan on the furnace. I've tried to do the Fan interlock as shown in the manual, but it still doesn't work. I'm pretty sure I need a isolation relay to accomplish this, If so what type of relay and the wire up config.

Here is a link to the manual http://customer.honeywell.com/Honeyw...=68-0171EF.pdf
Fig 15 on page 16.

thermostat is a Honeywell 8500D

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