GE CC-SCSTAT Manuel d'utilisateur télécharger pdf (Page 37)

HVAC system testing

If you have difficulty with the HVAC system operation, you can do the following test to verify the HVAC

system is operational.

Thermostats, like the SmartCommand thermostat, are just switches to the HVAC system as shown in the

Figure 20. This is a simplified example of a thermostat and a standard HVAC wiring diagram. You can test the

HVAC system operation by duplicating the thermostat switch operation by shorting across the thermostat

terminals on the HVAC system.

Figure 20. HVAC system wiring example

Note: The HVAC system and thermostat connection voltage is 24 VAC. This is a safe voltage to work with, but be careful to

avoid shorting the 24 VAC common (C) and 24 VAC return (R) terminals. This may blow a fuse in the HVAC system.

Typical thermostat

HVAC system (standard gas/AC)

Fan

Heat

Comp

Thermostat

connection

C 24 VAC common

R 24 VAC hot

G Fan

W Heat

Y Comp

24 VAC

Fan relay

Gas valve

Comp relay

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 43 44

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GE CC-SCSTAT Manuel d'utilisateur Page 37