9
O/B - reversing valve
Y1 - Cooling
Low Stage
Rc - 24 VAC, from cooling equipment
Rh - 24 VAC, from heating equipment
W - Heating
C - Common 24 VAC
G - Fan
Y/Y2 - Cooling High or Single Stage
A09271
Fig.3 -- TerminalDesignations
ELECTRICAL OPERATION HAZARD
Failure to follow this caution may result in e quipment damage or
improperoperation.
Improper wiring or installation maydamage the th ermostat. Check to
make sure wiring is correct before proceedingwith installation or
turning on unit.
CAUTION!9. Push any excess wire into wall and against mounting base. Seal hole in wall
to preventair leaks. Leaks can affect operation.
10. Snap case back together. Attach thermostat tobackplate by inserting tab on
bottomedge and hinging up until top snap secures. See Fig.4