WIRING METHOD A:
SAME POWER SOURCE FOR CONTROL AND BURNER CIRCUIT.
WIRING METHOD B:
SEPARATE POWER SOURCE FOR CONTROL AND BURNER CIRCUIT.
BURNER
POWER
SOURCE
24VAC
60HZ
NEUTRAL
HOT
DISCONNECT
SWITCH
BURNER
POWER
SOURCE
24VAC
60HZ
BURNER
POWER
SOURCE
24VAC
60HZ
NEUTRAL
HOT
+
0
LIMIT
CONTROLS
BURNER
POWER
SOURCE
24VAC
60HZ
+
0
FEEDER VALVE
CONTROL
POWER
SOURCE
24VAC
60HZ
NEUTRAL
HOT
DISCONNECT
SWITCH
CONTROL
POWER
SOURCE
24VAC
60HZ
NEUTRAL
HOT
BURNER
CIRCUIT
DISCONNECT
SWITCH
CONTROL
POWER
SOURCE
24VAC
60HZ
+
0
LIMIT
CONTROLS
BURNER
CIRCUIT
CONTROL
POWER
SOURCE
24VAC
60HZ
+
0
LIMIT
CONTROLS
BURNER
CIRCUIT
FEEDER VALVE
A1
Connect input voltage (24 VAC, 60HZ)
to terminals 2 and 1. 24 VAC, 60HZ
must be supplied to terminals 2 and 1 for internal
operation of the control.
Install a jumper between terminal 1
A2
and terminal P1. Power from terminal
P1 is supplied to terminal P2 when water reaches
the upper probe. Power to terminal P2 is removed
when water falls below the bottom probe.
A3
Connect terminal 2 to burner circuit
neutral. Connect terminal P2 to
burner circuit in series with other limit controls.
Consult boiler manufacturer’s instructions for
proper terminal connections. NOTE: Control is
wired in series with and before other limits.
Feeder Connection: Connect feeder
A4
common to terminal 2. Connect feeder
hot to terminal A. Whenever water falls below the
lower probe, power is supplied to the feeder ter-
minal A. When water reaches the upper probe,
power to the feeder is removed.
B1
Connect input voltage (24 VAC, 60HZ)
to terminals 2 and 1. 24 VAC, 60HZ
must be supplied to terminals 2 and 1 for internal
operation of the control.
Connect hot lead from burner
B2
control circuit to terminal P1.
This terminal supplies power to terminal P2 in
normal operating conditions when water is at the
probe. Connect neutral to burner circuit.
NOTE: Consult boiler manufacturer’s instructions
for proper terminal connections.
B3
Connect terminal P2 to burner circuit
in series with other limit controls.
Consult boiler manufacturer’s instructions for
proper terminal connections. NOTE: Control is
wired in series with and before other limits.
Feeder Connection: Connect feeder
B4
common to terminal 2. Connect
feeder hot to terminal A. Whenever water falls
below the lower probe, power is supplied to the
feeder terminal A. When water reaches the upper
probe, power to the feeder is removed.
NOTE:
All schematic diagrams show all systems in
the off position. No power applied.
A1
A3
A4
B1
B2
B3
B4
A2
3
