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Description
The Series PSE-800-M Manual Reset LWCO is a new addition to the McDonnell & Miller probe type low water cut-off group of products. These controls are used as the secondary LWCO on steam boilers and can be used as the primary LWCO on hot water heating boilers.

With a self-cleaning probe, available only on McDonnell & Miller probe type controls, which reduces probe maintenance to once every five years instead of annually. Manual reset models meet requirements of ASME Standard CSD-1.

Features
  • Lockout Delay
    • If a low water condition occurs (water off probe), the burner will turn off and the red LED will begin to blink. If the water level is not restored to a level above the probe with-in 60 seconds, the control will lock out. The reset button will need to be pressed when water level is restored to a level above the probe.
  • CSD-1 Code Compliance
    • If the control is in a low water condition (water off probe) when there is an interruption of power, the control will remain in a low water condition when power is restored. The reset button will have to be pressed when the water level is restored to a level above the probe.
  • Power Interruption
    • If there is a loss of power, the control will automatically reset if there was water on the probe before the loss of power AND there is water on the probe when the power is restored.
  • Self-cleaning Probe
    • This is available only on McDonnell & Miller probe type controls which reduces probe maintenance to once every five years instead of annually.
  • Test Button
    • Standard on all controls to allow the control to be tested without draining the boiler or system.
  • 'Green' Power On & 'Red' LWCO LED's
    • Standard on all units to give visual indication that the unit is powered up and when a low water condition is detected.
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Specs
Application:
Steam Boilers
Hot Water Boilers
Type:
Electronic
Reset Type:
Manual
Max Pressure (PSI):
15 psi (Steam)
160 psi (Hot Water)
Max Temp (F):
250°F
Voltage:
120v
Sensitivity:
7000 ohms
Electrical Ratings (AFL):
3.75 A @ 240 VAC
7.5 A @ 120 VAC
Electrical Ratings (ALR):
43.2 A @ 120 VAC
21.6 A @ 240 VAC
Max Ambient Temp (°F):
135°F
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