Honeywell 40003916-548 Replacement Motor

The Honeywell 40003916-548 Replacement Motor is a professional-grade 24Vac actuator designed specifically for the V8043F series zone valves. This power head assembly serves as a direct replacement for the 40003916-548/U, ensuring seamless integration into existing hydronic heating systems without the need for a full valve teardown. Featuring a robust screw terminal block positioned on the same side as the manual lever, this motor facilitates clean wiring and rapid field installation. The integrated end switch provides essential feedback for circulator pump sequencing, supporting 50 VA pilot duty at 24V. Engineered for normally closed operation with a reliable spring return to close mechanism, it maintains positive shut-off and prevents thermal migration. For technicians troubleshooting a stuck zone valve or a high-resistance actuator, this unit offers a high-torque solution to restore 2-position control and eliminate water hammer issues in sub-zones.

• Direct Compatibility: Optimized for V8043F 5000 Series and older 1000 Series 2-way zone valves.
• Efficient Wiring: The screw terminal block allows for secure, vibration-resistant connections without wire nuts.
• Manual Override: Features a manual opening lever for system filling, venting, or emergency operation during power loss.
• Auxiliary Control: Includes a built-in end switch to trigger a boiler or pump once the valve reaches the fully open position.
• Versatile Application: Operates on standard 24Vac and is rated for both 50 Hz and 60 Hz frequencies.

Can I replace the 40003916-548 without draining the system?
Yes, if your existing V8043F valve utilizes a two-screw mounting pattern, the replacement motor head can be swapped out without breaking the hydronic seal or draining the pipes.

Is the 40003916-548 identical to the 40003916-548/U model?
Yes, those part numbers refer to the same replacement actuator; the "/U" suffix simply denotes a "Universal" or Tradeline retail designation.

What are the electrical ratings for the auxiliary end switch?
The internal end switch is rated for 4.4 A running at 120 V and 50 VA pilot duty at 24 V, making it compatible with most standard boiler controllers.

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.