Installation Guide
- 1
m'_ Power supply. Provide disconnect means and overload protection as required.
A Factory-installed jumper. Remove for 2-transformer systems only.
Optional 24VAC common connection.
,_, In Installer Setup, set system type to Heat Only.
,_ In Installer Setup, set system type to Heat Pump & changeover valve to O or B.
Typical heat-only system with ?an Heat=only system (Series 20)
L1 L1
L2 (HOT) L2 (HOT)
P0WERTOOPEN
ANDP0WERT0
CLOSE
MOTO£ 0RVALVE
(SERIES20)
A
G WC Y R Rc
O/B
_C
G WC Y R Rc
O/8
Typical cool-only system
Lt
L2 (HOT)
le®oo®o
G WC Y R RC
O/B
Heat-only system (normally open zone valve)
L1
L2 (HOT)
c
q NORMALLY
OPEN
ZONE VALVE
A
AA
_Jr_
b®oo®o
G we Y R Rc
O/B