Finally there is the heat pump manufacturer cross reference including tips on how to use it. I need a wiring diagram for the bay28x138 or the bay28x140 i tried to change the thermostat but didnt know it was a answered by a verified hvac technician.
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Bay28x138 wiring diagram. A a mra bay28x153a 2 heat1 cool manualchangeover heatoffcoolsystemswitch autoonfan switch. C 24 vac common you might see blue purple or brown typically used for this wire. But here is a list of the most common wire color mappings as seen in many four wire t stat setups. The table above provides a more complete list of honeywell thermostat wiring colors and their uses. General information section are the internal schematics wiring diagrams and sequence of operation information for the electronic thermostats. Labeled terminal boardfor simplified wiring factory wiredfornon restrictedmode canbewiredforrestrictedmode replacement.
Honeywell thermostat wiring diagram 4 wire examples. The thermostat manufacturer cross reference is listed next. Bay28x138 a o m. Find your bay28x138 wiring diagram nest here for bay28x138 wiring diagram nest and you can print out. We use cookies to give you the best possible experience on our website. Search for bay28x138 wiring diagram nest here and subscribe to this site bay28x138 wiring diagram nest read more.
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