Install Instructions

2
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)
OPERA
TION
Maxim
um Pressure:
150 psi (10.5 kg/cm
2
)
Settings and Diff
erential Pressures
V
alues are ± 8” (3.2mm).
Series 150S,
157S
150 psi (10.5 kg/cm
2
) Levels
150 psi (10.5 kg/cm
2
) Le
vels
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
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)
Enclosure rating: NEMA 1 General Purpose
PumpCircuit Rating (Amperes)
V
oltage Full Load Locked Rotor Pilot Duty
120 V
AC 7.4 44.4
345 V
A at
240 V
AC 3.7 22.2
120 or 240 V
AC
Electrical Ratings
Alarm Circuit Rating
V
oltage Amps
120 V
AC 1
240 V
AC 1/2
Motor Horsepower
V
oltage Hp
120 V
AC
1/3
240 V
AC 1/3
CAUTION:
A more frequent replacement interval may be necessary based on the condition of
the unit at time of inspection. McDonnell Miller s warranty is one (1) year from date
of installation or two (2) years from the date of manufacture.
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