Install Instructions

2
Enclosure rating: NEMA 1 General Purpose
PumpCircuit Rating (Amperes)
Voltage Full Load Locked Rotor Pilot Duty
120 VAC 7.4 44.4
345 VA at
240 VAC 3.7 22.2
120 or 240 VAC
Approximate
Distance Above
Cast Line Differential
Setting In. (mm) In. (mm)
Pump Off
15
/16 (24)
5
/16 (8)
Pump On
5
/8 (16)
Burner On
5
/8 (16)
3
/8 (16)
Burner Off
1
/4 (6.4)
Pump Off 1
3
/8 (41)
3
/4 (19)
Pump On
5
/8 (16)
Burner On
7
/8 (22)
7
/8 (22)
Burner Off 0 (0)
OPERATION
Maximum Pressure: 150 psi (10.5 kg/cm
2
)
Electrical Ratings
Settings and Differential Pressures
Values are ± 8” (3.2mm).
Series 150S, 157S
150 psi (10.5 kg/cm
2
) Levels
150 psi (10.5 kg/cm
2
) Levels
0 psi
(0 kg/
cm
2
)
150 psi
(10.5 kg/
cm
2
)
Approximate
Distance Above
Cast Line Differential
Setting In. (mm) In. (mm)
Pump Off
15
/16 (24)
3
/
8
(16)
Pump On
9
/16 (14)
Burner Off 0 (0) N/A
Pump Off 1
7
/16 (37)
3
/
4
(19)
Pump On 11/16 (17)
Burner Off - 3/8 (-16)
N/A
Model 150S-MD, and 157S-MD
0 psi
(0 kg/
cm
2
)
150 psi
(10.5 kg/
cm
2
)
Pressure
Pressure
Alarm Circuit Rating
Voltage Amps
120 VAC 1
240 VAC 1/2
Motor Horsepower
Voltage Hp
120 VAC
1/3
240 VAC 1/3
BURNER OFF
BURNER ON
7
/8"
DIFFERENTIAL
(22mm)
PUMP
OFF
BURNER
OFF
NORMAL BOILER
WATER LINE
1
3
/8"
DIFFERENTIAL
(35mm)
PUMP OFF
PUMP ON
3
/4"
DIFFERENTIAL
(19mm)
PUMP OFF
PUMP ON
3
/4"
DIFFERENTIAL
(19mm)
PUMP
OFF
BURNER
OFF
NORMAL BOILER
WATER LINE
1
13
/16"
DIFFERENTIAL
(46mm)