How do I know if my heat pump is O or B?
Check the configuration. The heat pump is ‘O’ if it energizes in cooling and ‘B’ if it energizes on heating. Thermostats use the B terminal in systems with a reversing valve that turns on with heat mode. The system uses the O terminal if the reversing valve turns on while running cooling mode.
How many thermostat wires do I need for a heat pump?
8 wires
In heat pump system, there are at least 8 wires that need to be connected to the thermostat for proper operation.
Can you use any thermostat with a heat pump?
Yes! A majority of TSTAT systems are produced to operate with heat pumps. There are several 2020 Nest, Ecobee, and Lux smart/programmable thermostats models on the market that work well with heat pumps. These particular 2020 models below have aux and em heat features.
Does a heat pump require a special thermostat?
You need a special thermostat for a heat pump because it needs to be able to communicate with the reversing valve when changing from heating to cooling. Heat pumps rely on outside air and electricity. Heat pump thermostats will typically have a fifth wire explicitly for the reversing valve.
What wires are for heat on a thermostat?
FIVE WIRES The wires are typically arranged as follows: red for 24-volt hot, white for heat, yellow for cooling, green for the fan, and blue for common (although the common wire may be a different color).
Does heat pump use O or B wire?
The O and B terminals are for heat pumps; the B terminal is used in conjunction with Rheem, Ruud, or any other manufacturer that energizes the reversing valve in the heat pump’s heating mode. Most other manufacturers of heat pumps will utilize the reversing valve for cooling including the O thermostat.
Do I have O or B wire?
If your thermostat doesn’t have a separate connector labeled C and you’re not sure what type of system you have: A brown wire is mostly likely a heat pump wire and should be connected to the O/B connector on the Nest thermostat. If the B wire is blue, it should most likely be connected to the C connector.
Can you use a Honeywell thermostat with a heat pump?
Honeywell RTH5100B 1025 Deluxe Manual Thermostat The set temperature is maintained even when the thermostat restarts after a power outage. It is compatible with Works on all central heating and cooling systems including heat pumps without an auxiliary heat source.