Indoor Thermostat: Difference between revisions
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| Line 6: | Line 6: | ||
W : White Wire : Heat | W : White Wire : Heat | ||
Y : Yellow or Black Wire : Cool | Y : Yellow or Black Wire : Cool | ||
G : Green : Fan | G : Green : Fan | ||
R : Red : 24v | R : Red : 24v | ||
| Line 14: | Line 17: | ||
Jump G + R to force the fan to turn on | Jump G + R to force the fan to turn on | ||
Honeywell's round mechanical mercury thermostat "The Round" has 6 connectors. Only 4 are necessary for a typical HVAC system. | |||
B : black | |||
G : green : Fan | |||
Y : yellow : Cool | |||
W : white : Heat | |||
R : red : 24v | |||
O : orange | |||
Revision as of 17:33, 10 February 2009
A building thermostat is a device to control the heating and air-conditioning systems in a home, office, or other indoor environment.
The majority of modern heating/cooling/heat pump thermostats operate on 24 volts A/C.
4 Wire 24V HVAC Thermostat Wire Diagram
W : White Wire : Heat
Y : Yellow or Black Wire : Cool
G : Green : Fan
R : Red : 24v
Jump W + R will turn on heater on a gas operated HVAC system. On the gas system the fan is triggered automatically at the heater when a certain temperature is reached.
Jump G + R to force the fan to turn on
Honeywell's round mechanical mercury thermostat "The Round" has 6 connectors. Only 4 are necessary for a typical HVAC system.
B : black
G : green : Fan
Y : yellow : Cool
W : white : Heat
R : red : 24v
O : orange