12
BARD/JANITROL/TAPPAN/WILLIAMSON
! This terminal must be connected to transformer common.
# Leave factory-installed jumper in place.
$ Connect multiple second stage heating loads to W2 terminals.
% Thermostat is connected to either O or B terminal, but not

both.

Wiring
terminal
function
Existing
thermostat
wiring
New
thermostat
wiring
COMMON
POWER
COMPRESSOR
1ST STG.
HEAT
AUX. HEAT
FAN
C/O VALVE
HEAT
C/O VALVE
COOL
SYSTEM
MONITOR
EM. HEAT
MULTIPLE AUX.
HEAT LOADS
W1
W2 W2
G G
2
X XX1 or
Cor
1
E E
1
Y Y1
L L
B
O
W3 3
R RRCor
RHor
W1
Bor
3
4
4O