McDonnell & Miller FPC-1000-U Control

ELEC LWCO W/EXTEND BARL PROBE

FPC-1000-U is the cross of PSE-802-U-24

McDonnell & Miller FPC-1000-U Electronic Low Water Cut-Off – Extended Barrel Probe (MPN 144706)

Protect your boiler system with the Xylem McDonnell & Miller FPC-1000-U, a universal, field-configurable electronic low water cut-off (LWCO) designed for both steam and hot water boilers. Engineered with an extended barrel probe, this advanced safety control helps prevent dry firing and costly boiler damage by continuously monitoring water levels with patented conductivity-based technology.

Unlike traditional probe controls, the FPC-1000-U uses intelligent sensing to analyze changes in water resistance and only shuts down the burner when a true low-water condition is detected. This reduces nuisance shutdowns while delivering superior equipment protection. As an added safeguard, the control automatically turns off the burner if an out-of-water condition exceeds the preset sensitivity threshold.

Field configurable for multiple voltage and operation modes, this versatile LWCO can be set for 24V or 120V systems and supports automatic or manual reset configurations, making it a flexible replacement solution for a wide range of boiler setups.

Key Features

• Genuine McDonnell & Miller / Xylem OEM control

• Electronic Low Water Cut-Off (LWCO) with extended barrel probe

• Advanced conductivity-based sensing technology

• Minimizes nuisance shutdowns while maximizing boiler protection

• Field configurable for 24V or 120V operation

• Suitable for steam and hot water boilers

• Installs directly into boiler tappings

Specifications

• Model: FPC-1000-U

• MPN: 144706

• Application: Steam Boilers, Hot Water Boilers

• Probe Connection Size: 3/4" NPT

• Control Connection: NPT

• Maximum Steam Pressure: 15 psi

• Maximum Water Pressure: 160 psi

• Maximum Water Temperature: 250°F

• Maximum Ambient Temperature: 120°F

• Voltage: 24V / 120V (field selectable)

• Installation Method: Direct to Boiler Tappings

• Enclosure Rating: NEMA 1

Replaces Part Numbers

752P-MT-U-24, 751P-MT-U-120, PSE-801-U-120, PSE-802-U-24, PSE-801-M-U-120, PSE-802-M-U-24

The McDonnell & Miller FPC-1000-U LWCO Control delivers reliable, smart protection for commercial and residential boiler systems—helping extend equipment life and maintain safe operation.