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POWER AND RESET OPTIONS
The thermostat is powered from 24VAC In the case of power loss, the thermostat will maintain
the clock for 2 hours The thermostat has a memory backup that saves the thermostat settings
in case of power interruption The thermostat can be set back to factory defaults from the
installer settings menu See Installer System Settings section for details
The factory reset does not clear thermostat account information from the AprilAire Wi-Fi
Thermostat App To clear this information, remove the thermostat from the app or use the
unregister option from the thermostat's Wi-Fi settings
WIRING TERMINAL
WIRE SPECIFICATIONS:
• 18-24 gauge thermostat wire
INSTALLATION NOTES:
• Ensure power at the HVAC equipment is off
• Loosen screw terminals, insert stripped wire and re-tighten
• Push the excess wire back into the opening and plug the wall opening to prevent drafts
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RH
24VAC supply heating*
RC
24VAC supply cooling*
First stage heat (conventional) /
W
First stage auxiliary (heat pump)
First stage cooling (conventional) /
Y
First stage compressor (heat pump)
G
Fan
C
Common
O/B
Reversing valve
System fault indicator (optional)
L
(heat pump only)
Second stage heat (conventional) /
W2
Second stage auxiliary (heat pump)
Second stage cooling (conventional) /
Y2
Second stage compressor
(heat pump)
T1 & T2
Outdoor/remote temperature sensor
I1 & I2
Indoor Air Quality control output
* Jumper between RC & RH is used in single
transformer systems (see wiring diagrams).
FIGURE 4 – WIRING TERMINALS
90-2564
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