Hydrolevel 400 Series - Manual (Page 2)

A1
Connect input voltage (24 VAC, 60 HZ) to
terminals 1 and 2. 24 VAC, 60 HZ must be supplied
to terminals 1 and 2 for internal operation of the
control.
A3
Optional water feeder connection. Connect
feeder N to terminal 2. Connect Feeder H to termi-
nal 1. Connect feeder “FEED” or “W” to terminal A.
For water feeders with 2 leads, connect feeder
common to terminal 2 and feeder hot to terminal A.
Note: Use of a solenoid valve or McDonnell &
Miller Model 101A water feeder may cause flood-
ing and is not recommended for use with this low
water cut-off.
24VAC
HOT
COMMON
+ 0
LIMIT
CONTROLS
A P2 P1 1 2
BURNER
CIRCUIT
WATER
FEEDER
BURNER
POWER
SOURCE
24VAC
HOT
COMMON
BURNER
CIRCUIT
A P2 P1 1 2
BURNER
POWER
SOURCE
BURNER
POWER
SOURCE
24VAC
+ 0
LIMIT
CONTROLS
A P2 P1 1 2
HOT COMMON
BURNER
CIRCUIT
BURNER
POWER
SOURCE
24VAC
A P2 P1 1 2
FACTORY
INSTALLED
JUMPER COMMON
HOT
BURNER
POWER
SOURCE
24VAC
+ 0
LIMIT
CONTROLS
A P2 P1 1 2
BURNER
CIRCUIT
WATER
FEEDER
24VAC
A P2 P1 1 2
REMOVE
JUMPER
24VAC
+ 0
LIMIT
CONTROLS
A P2 P1 1 2
BURNER
CIRCUIT
HOT
COMMON
BURNER
POWER
SOURCE
P2
2
1
A P2 P1 1 2
A P2 P1 1 2
WATER
FEEDER
WIRING METHOD A: SAME POWER SOURCE FOR CONTROL AND BURNER CIRCUIT.
ᮤ
B1
Remove jumper between terminals 1
and P1. Connect input voltage (24 VAC, 60 HZ) to
terminals 1 and 2. 24 VAC 60 HZ must be supplied
to terminals 1 and 2 for internal operation of the
control.
Connect hot lead from the burner
B2
ᮣ ᮣ
control circuit to terminal P1. This terminal sup-
plies power to terminal P2 in normal operating
conditions when water is at the probe. Connect
common to burner circuit. Note: Consult boiler
manufacturer instructions for proper terminal con-
nections.
ᮤ
B3
Connect terminal P2 to burner circuit in
series with and before other limit controls.
Optional water feeder connection.
B4
ᮣ ᮣ
Connect feeder H to terminal 1. Connect feeder
“FEED” or “W” to terminal A. Connect terminal N to
common of the burner circuit supply. For feeders
with two leads, connect feeder hot to terminal A
and connect feeder common to common of the
burner circuit supply. Note: Use of solenoid valve
or McDonnell & Miller model 101A water feeder
may cause flooding and is not recommended for
use with this low water cut-off.
A2
Connect terminal 2 to burner circuit com-
mon. Connect terminal P2 to burner Circuit in
series with other limit controls. Consult boiler
manufacturer instructions for proper terminal con-
nections. Control should be wired in series with
and before other limit controls.
A1 A2 A3
B1
B3
C1
C2
B2
B4
WIRING METHOD B: SEPARATE POWER SOURCE FOR CONTROL AND BURNER CIRCUIT.
WIRING METHOD C: PLUG CONNECTOR.
ᮤ
C1
Plug wire harness connector into matching end on circuit board. IMPOR-
TANT: Factory installed jumper must be in place between
terminals 1 and P1.
ᮤ
C2
Optional water feeder connection. Connect feeder N to terminal 2.
Connect Feeder H to terminal 1. Connect feeder “FEED” or “W” to terminal A.
For water feeders with 2 leads, connect feeder common to terminal 2 and feeder hot
to terminal A. Note: Use of a solenoid valve or McDonnell & Miller Model 101A
water feeder may cause flooding and is not recommended for use with this low
water cut-off.