- 1 What is a metal jumper on a thermostat?
- 2 What is the jumper wire for on a thermostat?
- 3 Do I need a jumper from R to RC?
- 4 Why is there a jumper between R and RC?
- 5 Does R go to RC or RH?
- 6 Do I need a jumper on my thermostat?
- 7 What’s the difference between RC and RH on a thermostat?
- 8 What is W on a thermostat?
- 9 Is RC same as C wire?
- 10 Is r the same as Rh?
- 11 What color is C wire?
- 12 What does RH stand for in HVAC?
What is a metal jumper on a thermostat?
A thermostat jumper wire is a short piece of wire connecting two terminals on the thermostat base. A jumper wire does not originate from behind the wall, but is unique to each thermostat.
What is the jumper wire for on a thermostat?
Most of your current thermostat’s wires will be connected to your thermostat and go through the wall to connect to your HVAC system. However, some thermostats will have a jumper wire that doesn’t go back through the wall to connect to your system. Instead, a short jumper wire connects two thermostat terminals together.
Do I need a jumper from R to RC?
If you have a wire in the R terminal, and another wire (not a jumper) in the RC terminal, you will not need to connect the R and RC terminals. See our Basic Wiring article for more info here.
Why is there a jumper between R and RC?
Effectively there isn’t a second RH wire, although there is an RH terminal. However, the heating still needs to be controlled, so a wire known as a jumper is connected between the RC and the RH terminals so that power gets to the heating control part of the thermostat. This wire is also known as the RH wire.
Does R go to RC or RH?
In a thermostat, the R wire is responsible for powering the entire HVAC system (through a transformer). If you have both an Rh (Red-heat for powering the heating) and an Rc (Red-cool for powering the cooling), then the R wire can be connected to either Rh or Rc.
Do I need a jumper on my thermostat?
If your HVAC system has both heating and cooling functions, you’ll need to connect both the Rc and Rh terminals with a red wire. Because many thermostats come with a pre-installed thermostat jumper wire that connects these terminals, you only need one red wire, which could be the thermostat Rc wire or the Rh wire.
What’s the difference between RC and RH on a thermostat?
The RH wire refers to “red heating” which means that this is the connection you need in order to power the heating system of your air conditioning unit. The RC wire, on the other hand, refers to “ red cooling ”. It’s the same with the RH wire in that it powers the thermostat. For the RC, it powers the cooling system.
What is W on a thermostat?
W wire – heat. R wire – heat power. W wire – heat. G wire – fan.
Is RC same as C wire?
Typically, the wires that give the power supply (usually termed as the ‘hot’ wires) are marked Rc (for cooling) and Rh (for heating). They give a 24-volt power supply from the HVAC system’s control panel. ‘ If your system has a common wire, it will be marked ‘C’ at most times.
Is r the same as Rh?
R, Rh, and Rc are all the same, but not. In general terms, the R terminal is where you connect the signal voltage source. In low voltage controlled systems, there will be a step down transformer that provides the power to the control circuitry.
What color is C wire?
The blue wire on the thermostat is the Common or “C” wire.
What does RH stand for in HVAC?
Relative humidity (RH) is a measure of the moisture in the air, compared to the potential saturation level. Warmer air can hold more moisture. When you approach 100% humidity, the air moisture condenses – this is called the dew point. Air temperature is a measure of the heat.