Connect Thermostat to Gas Fireplace (Millivolt)


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Old 10-31-17, 07:06 AM
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Connect Thermostat to Gas Fireplace (Millivolt)

Hello,

I am kindly seeking assistance/confirmation with connecting a thermostat to my gas fireplace:
Napoleon Direct Vent Gas Fireplace (Model: B36NTR) with a millivolt operating system and a blower is also connected to the fireplace)

Currently it is connected to a light switch via 4 conductor wire per the following:
  • Yellow/Green wires are intertwined and connected to the > TP/TH terminal on the fireplace
  • Red/Black wires are intertwined and connected to the > TH terminal on the fireplace


1. Which terminals do I connect these wires to on the thermostat?

Terminals on Thermostat (White Rodgers Digital Thermostat Model: 1F78):
RC, RH, W, Y, O, B, G (there is a jumper between RH and RC)


I assume:
TH (red/black wires) > W
TP/TH (yellow/green wires) > RH

2. If so, do I need to remove the jumper?

3. Also there is a Electric Gas switch, which setting do I choose? (I assume "Electric" to turn it over to battery only power?)

Manuals for reference:
Fireplace - https://napoleonproducts.com/downloa.../W415-1678.pdf
Thermostat Wiring Diagrams - http://www.emersonclimate.com/Docume..._06_pg0190.pdf

Thank you for your time and assistance!
 
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Old 10-31-17, 08:54 AM
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It will not change anything in your application if you leave the jumper in or remove it as long as you connect to RH and W. ( But I would remove it)

The electric or gas switch controls the G terminal output to a fan control. Since you are not using a fan you can leave it in any position.
 
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Old 10-31-17, 11:24 AM
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Great thanks for the confirmation.

I will remove the jumper and connect TH (red/black wires) > W TP/TH (yellow/green wires) > RH.

Thanks!
 
 

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