Install Instructions

Motor Switch Rating (Amperes)
Model Voltage Full Load Locked Rotor Pilot Duty
120 VAC 7.2 43.2
125 VA at
120 VAC
240 VAC 3.6 21.6
120 or 240 VAC
50 or 60 Hz
2
5-1/2"
Test
Green
Power On
Red
High
Water
Reset Button
Model 750-HW-MT-120
Probe Type High Water
Control Unit
SPECIFICATIONS
Control Unit
Temperature Ratings:
Storage: -40˚F to 135˚F (-40˚C to 57˚C)
Ambient: 32˚F to 135˚F (0˚C to 57˚C)
Humidity: 85% (non-condensing)
Electrical Enclosure Rating: NEMA 1 General Purpose
RS-1-BR1 Remote Sensor
Maximum Steam Pressure: 250 psi (17.6 kg/cm
2
)
Maximum Water Pressure: 250 psi (17.6 kg/cm
2
)
Maximum Water Temperature: 406˚F (208˚C)
Electrical Enclosure Rating: NEMA 1 General Purpose
Connection Size: 1” NPT
RS-1-LP
Maximum Steam Pressure: 15 psi (1.0 kg/cm
2
)
Maximum Water Pressure: 160 psi (11.2 kg/cm
2
)
Maximum Water Temperature: 250˚F (121˚C)
Electrical Enclosure Rating: NEMA 1 General Purpose
Connection Size: 3/4” NPT
Electrical Specifications
Manual Reset
If a high water condition occurs (water on probe), the
manual reset button must be pressed once the water
level is restored to a level below the probe.
The Model 750-HW-MT-120 control provides continuous protection
against a high water condition in steam boilers. It can be used to
interrupt the burner circuit to turn off the burner, interrupt the feed-
water pump circuit to turn off the pump, or both. The control can
also be used to provide an alarm (light, horn or both) when a high
water condition occurs. The manual reset function will require that
the unit be reset after water has dropped below the level of the
probe.
Control Voltage: 120 VAC
Hz: 50/60
Control Power Consumption: 3 VA (max.)
Probe Sensitivity: 20,000 ohm