Nordyne M7 - Honeywell th8321 and Pellet Stove

Problems related to residential installations.

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Nordyne M7 - Honeywell th8321 and Pellet Stove

Post by HisKid1973 » Mon Nov 20, 2017 8:12 pm

I am finishing up enclosing a sun porch. I installed a pellet stove to warm it and the overflow to warm my m/h with two fans.I have HWth8321 which will use the furnace fan for ventilation as you know. Right now it is set for "furnace to control fan". I tried that and " stat controls fan" but the fan does not start. The furnace is an M7 Nordyne two stage. It has two separate terminal blocks on the board. The r,w, c,and black for the 2nd stage. The terminal block below has g, y1,y2. I'm wondering if that g will only work with
24v getting to y. I'm retired and did hvac in the past but this Nordyne has me wondering. I lived in m/h's
previously that had simpler methods to control/use the fans.
Thank you GBY

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