Internal Thermostat Wiring Diagram. I have the wireing diagrams from honey well and the heater company. Many technicians have great difficulty understanding how to properly wire a thermostat or how to replace a thermostat with a different thermostat.
If you have a two stage heat pump then you will also utilize terminal y2 for the second stage. See the diagram below for what each wire controls on your system. As i shown in the below electric water heater wiring diagram.
T87f thermostats provide temperature control for residential heating cooling or.
That is a basic honeywell thermostat wiring diagram for a single stage heat pump. 4 wire line voltage thermostat 120 v 15 a minimum l1 120 vac 15 a single pole circuit breaker l2 ckcktcns 120 vac units fig. Blue this is your common or c wire. 2 11 in which vector 1 is 120 degrees in advance of vector 2 and the phase sequence is 1 2 3.