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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22472
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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I have anew w.r. 36co3 333 propane valve I do not understand

Customer Question

I have anew w.r. 36co3 333 propane valve I do not understand where to hook the thermostat wire to . The gas valve has 3-terminals th ( th-tr) tr.. My unit the thermostat is hooked to relight on a weil mclain vhe-5 can you help me?
Submitted: 1 year ago.
Category: HVAC
Expert:  BillyHvac replied 1 year ago.


The TR and TH are the 2 terminals to power....TH/TR is a dummy terminal to put wires like a wire nut.

How many wires are to your valve?

Customer: replied 1 year ago.
2 wires from thermostat off relight t-1 t-2 one is common
Customer: replied 1 year ago.
common would go to the TR spade
Expert:  BillyHvac replied 1 year ago.

Th is from thermostat...or 24v supply

so if 2 wires to tr and one to th

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