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by alleyjr
Sat Sep 21, 2019 4:11 pm
Forum: Help and Advice
Topic: REplace HAI RC-80 Thermostat with Nest Gen3
Replies: 1
Views: 8128

REplace HAI RC-80 Thermostat with Nest Gen3

We're looking to replace 3 HAI Omnistat RC-80 Thermostats with Nest. We have a Single-Stage Gas furnace with the NCM 300 Zone Control system with 3 zones. I can see where to plug in the Thermostat with the 5 existing wires, but don't find what the wires are that control the damper for the zone. And ...