G or G1 controls your HVAC fan. O/B. On heat pump systems, O/B controls the reversing valve, which tells your compressor to switch between heating and cooling. E. Some thermostats for heat pumps have an E terminal, which toggles emergency heat on or off.
What does OB mean on thermostat?
The O/B terminal is for heat pump systems and is used for the reversing valve. When the “O” option/position is selected the reversing valve defaults to the heating mode. If the “B” option/position is selected the reversing valve defaults to the cooling mode.
What is W1 O B on thermostat?
W, W1, W2: Just like the Y wire, the W wire(s) control the heating aspect of your system. O, B, O/B: These wires are responsible for switching the changeover valve in a heat pump system. The O wire reverses the valve from heating to cooling, and the B wire switches the valve from cooling to heating.
How do I set my ecobee to emergency heat?
While on this system mode, the ecobee will display two set pointsone for heating and one for cooling. The cooling set point is blue while the heating set point is orange. To enable this system mode, go to Main Menu > Settings > Installation Settings > Thresholds > Auto Heat/Cool and select Enable.
How do I turn off ecobee auxiliary heat?
Turn off the Aux Heat Runtime Alerts
- Open the Web UI.
- Go to Reminders & Alerts.
- Select Preferences.
- Go to Aux Heat Runtime Alert.
- Here you can disable the alerts or change the alerts threshold.
What is OB in wiring?
The wires are used to switch the changeover valve in a heat pump system. The O and B wires switch the valve from cooling to heating. It could be a single O/B wire.
What color is ob?
European OB Full Color Code Chart
| Core # | Color |
|---|---|
| 93 | brown/white/red |
| 94 | violet/white/red |
| 95 | pink/white/red |
| 96 | orange/white/red |
Why is my Ecobee thermostat not cooling?
Your ecobee thermostat is powered off or is frequently rebooting. Water leakages, puddles of water, or signs of moisture around the air conditioning unit. An overflowing or full condensate drain pan. Signs of water damage around the drain pan or condensate drain line.
Is Rh the same as R on thermostat?
Understanding what RC stands for means, you can probably take an educated guess as to the meaning of RH. The “R” still indicates it’s a hot wire and terminal connection, and the “H” simply means heating. The RH wire connects to the RH terminal and controls the heating part of the thermostat.
Can Ecobee run humidifier without heat?
2) You have to know that when you set up your humidifier with Ecobee, you have to tell it that it’s a “steam” humidifier, NOT an evaporative one. This is not true, but it will allow the Ecobee to call for humidity even without heat blowing.
Does Ecobee automatically switch heat and cool?
2 Set Auto Mode
You can have your ecobee Smart Thermostat switch from heat to cool or from cool to heat automatically without having to do it manually.
How is your OB reversing valve energized?
The reversing valve has two states, relaxed (unactivated) versus energized. The energized state is typically achieved by applying 24 volts AC, which is commonly used in HVAC equipment. The heat pump can be designed by the manufacturer to produce either cooling or heating with the reversing valve in the relaxed state.
Is it bad if auxiliary heat comes on?
It does need to be noted, if your thermostat stays in Aux Heat even when temperatures outside rises, you should call to have it serviced. Auxiliary heat uses electric resistance heating, which is much less efficient than your heat pump. Therefore, a heating system stuck in AUX heat will run up an energy bill.
How often should auxiliary heat come on?
When should my auxiliary heat come on? When outside temperatures drop below 40 degrees. While undergoing the defrost cycle. When there is a 3 degree difference or more in the current temperature in your home and the thermostat setting.
When should you turn on auxiliary heat?
When the temperature inside your home drops about two or three degrees below the temperature the thermostat is set to, auxiliary heating kicks on to help warm your home more quickly.
What color is the OB wire on a thermostat?
orange wire
The orange wire connects to terminal O on your thermostat. The orange wire only applies to homeowners with an air-source heat pump.
What color is ob wire?
Orange Wire for O and Dark Blue Wire for B, depending on the installer of the heat pump and the manufacturer.
What is Rh on a thermostat?
Rh stands for Red-Heat and Rc stands for Red-Cool. If you only have a single red wire the jumper between Rh and Rc are required for some heating and cooling hybrid systems depending on your thermostat. Yellow/Y is the AC compressor. White/W is the Heating element. Green/G runs the fan.
What happens if you wire a thermostat wrong?
Potential consequences of improper installation could include: Electric shock. Blowing a circuit breaker. Damaging the thermostat unit, the electrical system or even the AC/furnace unit itself.
What are the 5 thermostat wires?
5 Wire Thermostat Wiring (Any HVAC Device Air Conditioners, Heat Pumps, Furnaces, etc.)
- Red wire for power (24V).
- White wire for heating (connected to W or W1 terminal).
- Green wire for fans.
- Blue or yellow wire for cooling (connected to Y).
- Black wire for C or Common wire.
How do you test a thermostat?
Checking your car’s thermostat
- Have your car on level ground and make sure the engine and radiator are cool.
- Open the car hood and find the thermostat.
- Next, you will need to test your car thermostat.
- If you find the coolant is flowing, it means the thermostat valve is open.
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