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PART 3. GAS CONNECTION
8
WARNING
Failure to follow all precautions could result in fire, explosion or death!
ELECTRICAL / GAS CONNECTION
Figure 2-3: For circulator amp loads greater
than 4 amps (3 amps for “HA” models) use the
wiring diagram shown at left. The brown and
orange wires will not be used in this
application.
NORMALLY OPEN
T
T
GROUND
BUS
SWITCH JUNCTION BOX
120V 60 HZ
ELECTRICAL
SWITCH JUNCTION BOX
120V 60 HZ
ELECTRICAL
NORMALLY OPEN
THERMOSTAT
CONNECTION
WIRING DIAGRAM WITHOUT CONNECTION TO CIRCULATOR
GREEN
(GROUND)
GRAY
GRAY
CONNECTION
THERMOSTAT
(NEUTRAL)
WHITE
BLACK
(HOT)
GRAY
T
T
GRAY
WIRING DIAGRAM CONNECTING TO CIRCULATOR
BLACK
WHITE (NEUTRAL)
GREEN (GROUND)
DIAGRAM "A"
(HOT)
BLACK
GREEN
(GROUND)
(NEUTRAL)
WHITE
DIAGRAM "B"
BROWN (NEUTRAL)
ORANGE (HOT)
GREEN (GROUND)
ORANGE (HOT)
BROWN (NEUTRAL)
GREEN (GROUND)
IMPORTANT NOTE:
BE CERTAIN THAT THE ORANGE
WIRE IS SECURELY CAPED.
FAILURE TO DO SO COULD
RESULT IN INJURY OR FIRE
AND COULD DAMAGE THE CONTROL.
ORANGE
BROWN
GREEN
Figure 2-1: Connection Wiring Directly to
Central Heating Circulator
Figure 2-2: Connection Wiring without Wiring
Central Heating Circulator
Note to Electrical Contractor: The orange
wire is 120 Volt/4 Amp maximum for central
heating circulator only. Loads greater than 4
amps or 3 amps for HA models only will blow the
fuse on the board. The brown wire is the neu-
tral wire for the central heating pump only.
5
T
1
2
3
6
4
T
1K1 1K2
BOILER
"TT"
GRAY
ZONE
CIRCULATOR
120 VOLT
L1 HOT (BLACK)
GRAY
BOILER
"TT"
THERMOSTAT
ZONE
R845A
SWITCHING
RELAY ZONE
1K1
L2 NEUTRAL
(WHITE)