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Typical Furnace Wiring:
TR-TW Terminals
Located on
opposite side of
Control
(If applicable)
Figure 3 – 7505A (for replacement of R7184A)
● Interrupted ignition, no valve-on or motor-off delay
LIMIT
L1
L2 (VLV)
VALVE
L2
MOTOR
L2 (MTR)
L2 (IGN)
IGNITER
CAD
CELL
MOTOR
IGNITER
W
R
80
70
60
50
50
70
80
60
LIMIT
CAD CELL
THERMOSTAT
TR
TW
TR-TW
JUMPER
TR-TW TERMINALS
LOCATED ON OPPOSITE
SIDE OF CONTROL
BOILER CONTROL
B2 B1
T
T
L1
L2
L1
L2
TR-TW Terminals
Located on
opposite side of
Control
(If applicable)
Figure 4 – 7505B (for replacement of R7184B)
● Interrupted ignition, valve-on delay only (no motor-
off delay)
LIMIT
L1
L2 (VLV)
VALVE
L2
MOTOR
L2 (MTR)
L2 (IGN)
IGNITER
CAD
CELL
MOTOR
IGNITER
B2 B1
T
T
W
R
80
70
60
50
50
70
80
60
LIMIT
OIL VALVE
CAD CELL
THERMOSTAT
BOILER CONTROL
TR
TW
TR-TW
JUMPER
TR-TW TERMINALS
LOCATED ON OPPOSITE
SIDE OF CONTROL
L1
L2
L1
L2
TR-TW Terminals
Located on
opposite side of
Control
(If applicable)
Figure 5 – 7505P (for replacement of R7184P)
● Interrupted ignition, valve-on and motor-off delays
NOTE: To disable motor-off delay on a 7505P control,
jumper L1 and limit together and wire as shown in Fig. 4.
LIMIT
L1
L2 (VLV)
VALVE
L2
MOTOR
L2 (MTR)
L2 (IGN)
IGNITER
CAD
CELL
MOTOR
IGNITER
W
R
80
70
60
50
50
70
80
60
OIL VALVE
CAD CELL
THERMOSTAT
TR
TW
TR-TW
JUMPER
TR-TW TERMINALS
LOCATED ON OPPOSITE
SIDE OF CONTROL
BOILER CONTROL
B2 B1
T
T
L1
L2
L1
L2
TR-TW Terminals
Located on
opposite side of
Control
(If applicable)
Figure 6 – 7505A (for replacement of R8184G)
● Intermittent ignition, no valve-on or motor-off delays
SAFETY AND
OPERATING
LIMITS
LIMIT
L1
L2 (VLV)
VALVE
L2
MOTOR
L2 (MTR)
L2 (IGN)
IGNITER
CAD
CELL
MOTOR
IGNITER
W
R
80
70
60
50
50
70
80
60
CAD CELL
THERMOSTAT
TR
TW
TR-TW
JUMPER
TR-TW TERMINALS
LOCATED ON OPPOSITE
SIDE OF CONTROL
L1
L2
LIMIT
TR-TW Terminals
Located on
opposite side of
Control
Figure 7 – 7505A (for replacement of R7184A)
● Interrupted ignition, no valve-on or motor-off delay
SAFETY AND
OPERATING
LIMITS
LIMIT
L1
L2 (VLV)
VALVE
L2
MOTOR
L2 (MTR)
L2 (IGN)
IGNITER
CAD
CELL
MOTOR
IGNITER
W
R
80
70
60
50
50
70
80
60
CAD CELL
THERMOSTAT
TR
TW
TR-TW
JUMPER
TR-TW TERMINALS
LOCATED ON OPPOSITE
SIDE OF CONTROL
L1
L2
LIMIT
TR-TW Terminals
Located on
opposite side of
Control
Figure 8 – 7505B (for replacement of R7184B)
● Interrupted ignition, valve-on delay only (no
motor-off delay)
SAFETY AND
OPERATING
LIMITS
LIMIT
L1
L2 (VLV)
VALVE
L2
MOTOR
L2 (MTR)
L2 (IGN)
IGNITER
CAD
CELL
MOTOR
IGNITER
W
R
80
70
60
50
50
70
80
60
OIL VALVE
CAD CELL
THERMOSTAT
TR
TW
TR-TW
JUMPER
TR-TW TERMINALS
LOCATED ON OPPOSITE
SIDE OF CONTROL
L1
L2
LIMIT
TR-TW Terminals
Located on
opposite side of
Control
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