Operation – Xylem MM 221G Models 157S RBP MD Low Water Cut-Offs/Pump Controllers User Manual
Page 2
Pump or Motorized Valve
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
5
1
/
2
(140)
1
1
/
2
(38)
Pump On
4
(102)
Pump Off
15
/
16
(24)
3
/
8
(16)
Pump On
9
/
16
(14)
Burner Off
0
N/A
Pump Off
1
7
/
16
(37)
3
/
4
(19)
Pump On
11
/
16
(17)
Burner Off
-
3
/
8
(-16)
N/A
2
PUMP OFF
CAST LINE
3
/
8
"
(35mm)
9
/
16
"
(16mm)
PUMP ON
BURNER OFF
CASTING LINE
PUMP ON
PUMP OFF
;
;
;
;
;;
;;
;;
1
1
/
2
"
(38mm)
4"
(102mm)
OPERATION
Maximum Pressure: 150 psi (10.5 kg/cm
2
)
Electrical Ratings
Float Control
Probe Control (750BM-P-120-CI)
157S-RBP-MD
Settings and Differential Pressures:
Probe Sensitivity:
- 26,000 ohms
Probe Input Power
- 120 volts
Pump or Motorized Valve
Circuit Rating (Amperes)
Voltage
Full Load
Locked Rotor
120 VAC
7.2
43.2
240 VAC
3.75
21.6
Probes Any
Pressure
Float
0 psi
(0 kg/cm
2
)
Float
150 psi
(10.5 kg/cm
2
)
Pressure
Alarm Circuit Rating
Voltage
Amps
120 VAC
1
240 VAC
1/2
Motor Horsepower
Voltage
Amps
120 VAC
1/3
240 VAC
1/3
* Values are ±
8" (3.2mm).
Probe Settings
Float Settings (0 psi)