Operation – Xylem MM 244B Series 42S Replacement Snap Switch Assembly User Manual
Page 3
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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)
BURNER
ON
BURNER
OFF
NORMAL BOILER
WATER LINE
BURNER
CUT-OFF LEVEL
AT CAST LINE
7/8
"
(22mm)
PUMP
OFF
BURNER
OFF
NORMAL BOILER
WATER LINE
BURNER
CUT-OFF LEVEL
AT CAST LINE
1 3/8
"
(35mm)
PUMP
OFF
PUMP
ON
NORMAL BOILER
WATER LINE
3/4
"
(19mm)
OPERATION
3
Maximum Pressure: 50 psi (3.5 kg/cm
2
)
Electrical Ratings
Settings and Differential Pressures
Values are ±
1
/
8
” (3.2mm).
Series 42S
50 psi
(3.5 kg/
cm
2
)
Pressure
Motor Horsepower
Voltage
Hp
120 VAC
1/3
240 VAC
1/3
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