HONEYWELL XFR824A – 24 Vac Control Transformer for Reliable Panel Power

The HONEYWELL XFR824A is a panel-grade control transformer that steps mains voltage down to a safe, stable 24 Vac supply—exactly what many HVAC actuators, dampers, valves, and building automation controllers expect. From my experience, it’s the kind of “fit-and-forget” power block you pick when you want straightforward reliability without surprises. You might notice that it’s often specified in retrofit work because it drops seamlessly into typical BAS panels with minimal wiring changes.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days
• Lead time: 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment, full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• 24 Vac secondary for BAS/HVAC loads – Ideal for powering actuators, thermostats, and I/O modules that expect 24 Vac.
• Honeywell-grade build – Robust coil and lamination stack designed for continuous duty; typically runs cool in ventilated cabinets.
• Clear terminal labeling – Simplifies wiring and reduces commissioning time, especially during retrofits.
• Electrical isolation – Isolates field circuits from mains for safer maintenance and cleaner power to sensitive controls.
• Panel-friendly form factor – Suits standard industrial enclosures; usually mounted near the controller power section.
• Broad compatibility – Works well with Honeywell actuators/valves and many third-party BAS components that require 24 Vac.

Technical Specifications

Application Fields

• HVAC control panels for AHUs, FCUs, and rooftop units needing 24 Vac control power.
• Building automation systems (BAS/BMS) powering I/O modules and small controller loads.
• Damper/valve actuators and thermostatic control circuits (24 Vac).
• Retrofits where a dependable 24 Vac source is required alongside existing Honeywell devices.

Advantages & Value

• Reliability that reduces callouts – Stable output and low noise help avoid nuisance controller resets.
• Compatibility – Pairs well with Honeywell actuators and many third‑party 24 Vac loads.
• Procurement friendly – Straightforward spec, easy to substitute in multi-vendor panels.
• Cost control – Durable construction and simple installation typically translate into lower lifecycle cost.
• Support – If you’re matching a replacement, we can help confirm VA sizing against your connected loads.

Installation & Maintenance

• Mounting – Install inside a ventilated control cabinet; keep clear of heat sources and allow airflow around the coil stack.
• Wiring – Use appropriately sized copper conductors; torque terminals per good practice; separate low-voltage wiring from mains.
• Protection – Fit a primary fuse/breaker and secondary overcurrent protection; add a dedicated secondary fuse for each branch load where practical.
• Earthing – Bond transformer frame to protective earth; reference secondary to ground only if your control design requires it.
• Load check – Verify VA load headroom (actuator inrush can be higher than running VA); measure secondary voltage under load.
• Routine care – Annually inspect for discoloration, loose terminals, or abnormal hum; clear dust; re-check terminal tightness.

Quality & Certifications

• Manufactured under Honeywell quality systems (factories typically ISO 9001 certified).
• Generally supplied with region-appropriate approvals such as UL Recognized and CE; RoHS compliant in most cases.
• Warranty: 365 days from shipment.