Change 1F89-273 White-Rodgers to Honeywell Pro 3000 wiring help

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Old 12-31-15, 10:43 AM
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Change 1F89-273 White-Rodgers to Honeywell Pro 3000 wiring help

I have the following wiring terminals and old connections to the WR thermostat. Which wires go where on the Honeywell?

W-R Wire PRO
R brown R
G green G
O orange O
Y white/green Y
C blue C
L (none) L
W2 white/brown B
E white/blue E
AUX
Thanks.
 
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Old 12-31-15, 11:00 AM
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Welcome to the forums.

The wiring you are describing is data/phone cable. Eight conductor cable like CAT 5 computer cable.
That cable is #24 wire when #18 thermostat cable is suggested/required.
A short run is passable but it makes the wiring confusing.

I'll be back with the wiring code.
 
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Old 12-31-15, 11:15 AM
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PRO 3000 is the product category not the model number.

From what I see you cannot use a stat in this series. You need a stat that can control a heatpump system with back up electric heating.
 
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Old 12-31-15, 07:52 PM
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You cannot connect anything to the B terminal on the new thermostat.
The old W2 is the new Aux.


https://customer.honeywell.com/resou...0s/69-1775.pdf

I recommend pulling new stat wire or using a redlink TH8321R thermostat with an EIM so that you can lose that cat 5 wire.
 
 

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