Install Instructions

Pump Circuit 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 1
3
/8 (35)
3
/4 (19)
Pump On
5
/8 (16)
Burner On
7
/8 (22)
7
/8 (22)
Burner Off 0 (0)
NORMAL BOILER
WATER LINE
BURNER
CUT-OFF LEVEL
AT CAST LINE
7/8" (22 mm)
BURNER ON
BURNER OFF
CUT-OFF
LEVEL
NORMAL BOILER
WATER LINE
PUMP
OFF
BURNER
OFF
BURNER
CUT-OFF LEVEL
AT CAST LINE
1 3/8" (35mm)
CUT-OFF
LEVEL
NORMAL BOILER
WATER LINE
CUT-OFF
LEVEL
PUMP OFF
PUMP ON
3/4" (19mm)
OPERATION
Maximum Pressure: 50 psi (3.5 kg/cm
2
)
Electrical Ratings
Settings and Differential Pressures
Values are ± 8” (3.2mm).
Series 42S
50 psi
(3.5 kg/
cm
2
)
Pressure
2
Motor Horsepower
Voltage Hp
120 VAC
1/3
240 VAC 1/3