WIRING METHOD A:
Same 120V Power Source for Control and Burner Circuit
WIRING METHOD B:
For use with Gas Boilers or Separate Power Source for Control and Burner Circuit
BURNER
POWER
SOURCE
120VAC
60HZ
NEUTRAL
HOT
DISCONNECT
SWITCH
BURNER
POWER
SOURCE
120VAC
60HZ
BURNER
POWER
SOURCE
120VAC
60HZ
NEUTRAL
HOT
BURNER
+
0
LIMIT
CONTROLS
BURNER
POWER
SOURCE
120VAC
60HZ
BURNER
+
0
FEEDER VALVE
CONTROL
POWER
SOURCE
120VAC
60HZ
NEUTRAL
HOT
DISCONNECT
SWITCH
CONTROL
POWER
SOURCE
120VAC
60HZ
HOT
BURNER
CIRCUIT
DISCONNECT
SWITCH
CONTROL
POWER
SOURCE
120VAC
60HZ
+
0
LIMIT
CONTROLS
BURNER
CIRCUIT
CONTROL
POWER
SOURCE
120V
120V
AC
60HZ
+
0
LIMIT
CONTROLS
BURNER
CIRCUIT
FEEDER VALVE
A1
Connect input voltage (120 VAC,
60HZ) to terminals 2 and 1. 120
VAC, 60HZ must be supplied to terminals 2
and 1 for internal operation of the control.
Install a jumper between terminal
A2
1 and terminal P1. Power from
terminal P1 is supplied to terminal P2 when
water reaches the upper probe. Power to ter-
minal 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 sup-
plied to the feeder terminal A. When water
reaches the upper probe, power to the feeder
is removed.
B1
Connect input voltage (120 VAC,
60HZ) to terminals 2 and 1. 120
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 instruc-
tions for proper terminal connections.
B3
Connect terminal P2 to burner cir-
cuit 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 sup-
plied 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
