Difference between revisions of "Indoor Thermostat"

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Line 6: Line 6:
  
 
W : White Wire : Heat
 
W : White Wire : Heat
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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 19:33, 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