McDonnell & Miller WFE-24V Water Feeder

The McDonnell & Miller WFE-24V Water Feeder (Part Number 169550) is a heavy-duty electronic water feeder designed for seamless integration with low water cut-off (LWCO) systems in residential and light commercial steam boiler applications. Operating on 24Vac, this Uni-Match model features field-adjustable dwell-feed cycles, allowing technicians to fine-tune the timing and prevent overfeeding or "hunting" in the system. The 3/8" NPT connections and included sweat adapters for 1/2" copper simplify installation in high-pressure environments, supporting water supply pressures up to 150 psi and boiler pressures up to 15 psi.

Engineered for maximum reliability, the 169550 water feeder includes a multi-color LED status indicator for rapid diagnostics and a manual feed button to bypass automated controls during maintenance. The integrated hard-stop limit acts as a critical failsafe, stopping the feed cycle to prevent boiler flooding if a leak or mechanical failure persists. This unit is fully compatible with both probe-type and float-type LWCOs, making it the industry standard for maintaining a safe minimum water level and protecting against dry fire conditions.

• Precise Level Control: Field-selectable DIP switches allow for custom dwell-feed cycles to match specific boiler return rates.
• Universal Compatibility: Works with all major electronic water feeder secondary controls and legacy mechanical setups.
• Safety Monitoring: High-visibility multi-color LED provides real-time status, including cycle completion and error codes.
• Debris Protection: Features a removable strainer to protect the solenoid from sediment and pipe scale.
• Flow Flexibility: Equipped for 2 GPM standard feed rate, with additional orifices included for 1 GPM or 4 GPM adjustments.

Can this feeder be used on a hot water boiler?
Yes, while commonly used on steam systems, the WFE-24V is rated for hot water boilers up to 150 psi, provided the water temperature does not exceed 120°F.

What does it mean if the LED is flashing red?
A red indicator typically suggests the dwell-feed cycle has been exceeded without satisfying the low water cut-off, signaling a potential leak or feed rate issue that requires manual reset.

Is a transformer included with the 169550?
No, this model requires a separate 24Vac power source. Technicians often pair it with a McDonnell & Miller 101-24V transformer for optimal performance.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.