Hydrolevel 724 Series - Manual (Page 2)

WIRING METHOD A:
SAME POWER SOURCE FOR CONTROL AND BURNER CIRCUIT.
WIRING METHOD B:
SEPARATE POWER SOURCE FOR CONTROL AND BURNER CIRCUIT.
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A1 Connect input voltage (24 VAC, 60HZ)
to terminals 1 and 2. 24 VAC, 60HZ
must be supplied to terminals 1 and 2 for internal
operation of the control.
Install a jumper between terminal 2 A2
and terminal P(1). Power from terminal
P(1) is supplied to terminal P(2) when water
reaches the upper probe. Power to terminal P(2)
is removed when water falls below the bottom
probe.
A3 Connect terminal 1 to burner circuit
neutral. Connect terminal P(2) 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 1. Connect feeder
hot to terminal V. Whenever water falls below the
lower probe, power is supplied to the feeder ter-
minal V. When water reaches the upper probe,
power to the feeder is removed.
B1 Connect input voltage (24 VAC, 60HZ)
to terminals 1 and 2. 24 VAC, 60HZ
must be supplied to terminals 1 and 2 for internal
operation of the control.
Connect hot lead from burner B2
control circuit to terminal P(1).
This terminal supplies power to terminal P(2) 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 P(2) 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 1. Connect
feeder hot to terminal V. Whenever water falls
below the lower probe, power is supplied to the
feeder terminal V. 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