Changing thermostat by your self with out a Denver HVAC technician could be fairly harrowing if you don’t hook up the wiring appropriately. Within the thermostat there are a number of terminals which should hook up with the suitable wires. The R-terminal is the thermostat’s energy. R means Crimson, the Colorado heating repairman ought to have crimson wires going to this terminal. This energy comes from the transformer. The transformer is often within the condensing unit or the air handler in a cut up system. As a result of they’re supplying energy, it’s a good suggestion to kill the ability to each the condenser and the air handler earlier than engaged on the thermostat.

The RC terminal is the ability for cooling. Some giant HVAC techniques have two transformers, one for cooling and one for warmth. In such a case, the ability from the ac system goes to the thermostat terminal. A jumper could be put in between RC and RH for a single transformer heating and cooling system. The RC terminal can also be crimson.

The RH terminal is the heating power-in. That is additionally crimson and could be jumped to the RC.

The Y terminal is yellow and goes to the compressor relay. Some Denver HVAC specialists use a terminal board strip on the air handler management board which makes splices not wanted. Y2 is often mild blue and is the hex code for a second stage cooler. For those who do have two compressors, each ought to work off the identical thermostat. Most Denver heating and air corporations don’t want the cooling of a two stage firm.

W is the heating terminal. W is for white terminal. This could go on to your heating supply, whether or not it’s a furnace or boiler. W2 is for second stage warmth and is often brown. That is for fuel furnaces with high and low settings. Warmth pumps use W2 for auxiliary warmth.

G is for inexperienced and goes to the indoor blower fan relay.

C is for Widespread, and doesn’t have a selected coloration though black is seen often. For digital thermostats that eat energy, the frequent wire is important to finish the 24 volt circuit.

Orange “O” and “B” Blue are for warmth pumps. Rheem and Ruud warmth pumps use the B terminal for the cooling reversing valve. Different HVAC producers use the O terminal. Trane, Lennox, Goodman, Ducane, Heil, Service, Fedders, Amana, and Janitrol are usually hooked as much as the O terminal by HVAC contractors in Denver.

E is for emergency heating. This has no commonplace coloration however ought to be wired to the heating relay or E terminal strip board.

S1 and S2 are for out of doors air sensors. This has no commonplace coloration, however ought to use a shielded wire to scale back interference and the potential of water harm from outdoors. Warning: These colours are the defaults. The individual wiring the thermostat may have used unconventional coloration coding.