Install Instructions

䊴
A1 Connect the hot lead of the input
voltage (24 VAC, 60 HZ) to terminal 1. Connect
the neutral lead to terminal 2. 24 VAC, 60 HZ
must be supplied to terminals 1 and 2 for inter-
nal operation of the control.
Connect terminal 2 to burner
A2
䊳
circuit neutral. Connect terminal P2 to burner
circuit in series with other limit controls.
Consult boiler manufacturer instructions for
proper terminal connections. Control should be
wired in series with and before other circuits.
P1 P2 A
+ 0
LIMIT
CONTROLS
BURNER
CIRCUIT
NEUTRAL
HOT
21
ALARM
P1 P2 A
HOT
BURNER
CIRCUIT
NEUTRAL
21
BURNER
POWER
SOURCE
(24 or
120VAC)
P1 P2 A
NEUTRAL
HOT
BURNER
+ 0
LIMIT
CONTROLS
21
2
P1 P2
A
BURNER
POWER
SOURCE
24 VAC
1
NEUTRAL
HOT
FACTORY
INSTALLED
JUMPER
1
P1 P2 A
ALARM
2
P2 A
24VAC
1
NEUTRAL
HOT
P1
P1 P2 A
+ 0
LIMIT
CONTROLS
BURNER
CIRCUIT
HOT
NEUTRAL
21
WIRING METHOD A: SAME POWER SOURCE FOR CONTROL AND BURNER CIRCUIT.
䊴
B1WARNING! Remove the jumper
between 1 and P1. Connect the hot lead of the
input voltage (24 VAC, 60 HZ) to terminal 1.
Connect the neutral lead to terminal 2. 24 VAC,
60 HZ must be supplied to terminals 1 and 2 for
internal operation of the control.
Connect hot lead from the 24 VAC
B2
䊳
or 120 VAC burner power source 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 instructions
for proper terminal connections.
䊴
A3 Optional alarm connection. Connect
alarm common to terminal 2. Connect alarm hot
to terminal A.
Upon completion of wiring, replace control
box cover.
䊴
B3 Connect terminal P2 to burner
circuit in series with and before other limit con-
trols.
Optional alarm connection. Connect
B4
䊳
alarm hot to terminal A. Connect alarm common
to neutral of the burner power source.
Upon completion of wiring, replace control
box cover.
A1
A2
A3
B1
B3
B2
B4
WIRING METHOD B: SEPARATE POWER SOURCE FOR CONTROL AND BURNER CIRCUIT.
WARNING: Be sure to
remove the jumper
between 1 and P1.