Power & Reset Options; Wiring Terminal - Aprilaire 8620 Instrucciones De Instalación Y Seguridad

INSTALLATION
POWER & RESET OPTIONS
The thermostat is dual power . It can either be AC or
battery powered, or both (to provide backup power for
the clock) . Batteries are optional if your thermostat was
wired to run on AC power when installed .
For heat pump systems the C terminal must be connected
to the common of the 24VAC transformer in order for the
system fault and emergency heat indicators to operate .
The thermostat has a memory backup that saves the
thermostat settings in case of a power interruption . The
system settings will be retained but the clock will reset
after 90 seconds with no battery or AC power .
The reset button located under the battery cover can
be used to reset the thermostat to factory defaults . The
system settings will also be reset to default .
Note: The reset button is disabled when the thermostat
is removed from the wall for programming .

WIRING TERMINAL

I2 C I1 O/B Y Y2 G RC R W2 W L S2 S1 T1
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 .
4 English
I1 & I2 – Indoor Air Quality control output
C – Common (optional when powered by batteries)
O/B – Reversing valve
T2
Y – 1st stage cooling / compressor
Y2 – 2nd stage cooling / compressor
G – Fan
RC – 24VAC supply cooling
1
R – 24VAC supply heating
1
W2 – 2nd stage heat / auxiliary
W – 1st stage heat / auxiliary
L – System fault indicator (optional) (heat pump only)
S1 & S2 – outdoor temperature sensor (included)
T1 & T2 – remote temperature sensor (optional)
1 Jumper between RC & R is used in single transformer systems
(see wiring diagrams).
INSTALLATION
CONVENTIONAL HEAT/COOL WIRING DIAGRAMS
SINGLE TRANSFORMER (USE JUMPER WIRE)
RESET
BUTTON
I2 C I1 O/B Y Y2 G
HEAT PUMP WIRING DIAGRAMS
SINGLE TRANSFORMER (USE JUMPER WIRE)
I2 C I1 O/B Y Y2 G
TWO TRANSFORMERS (REMOVE JUMPER WIRE)
RC R W2 W L S2 S1 T1 T2 I2 C I1 O/B
TWO TRANSFORMERS (REMOVE JUMPER WIRE)
I2 C I1 O/B
RC R W2 W L S2 S1 T1 T2
Y Y2 G RC R W2 W L S2 S1 T1 T2
Y Y2 G RC R W2 W L S2 S1 T1 T2
English 5