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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
1
ST
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
C
or
1
E E
1
Y Y1
L L
B
O
W3
3
R RRC
or
RH
or
W1
B
or
3
4
4
O