Marley Engineered Products 5814-0003-000 Transformer

The Marley Engineered Products 5814-0003-000 is an essential component for sustaining the control circuits in heavy-duty HVACR environments. This 40VA control transformer features a primary voltage multi-tap design, accommodating 208V and 240V power supplies, with a steady 24V secondary output. Built to withstand the rigors of industrial heating and cooling systems, this part provides the precise step-down power required for contactors, relays, and thermostats.

When replacing an existing unit, technicians will appreciate the classic footprint and durable winding construction which resists the thermal stress common in HVAC transformer applications. Its 50/60Hz frequency rating ensures stability across varied power grids, while the 40VA capacity offers sufficient overhead for standard residential and light commercial control strings. Proper 240V to 24V transformer integration is critical for preventing control board failure and ensuring responsive relay activation during peak cycles.

Key Benefits

• Standard 40VA power rating supports multiple control components without voltage drop.
• Compatible with both 208V and 240V primary circuits for versatile field application.
• Reliable 24V secondary voltage for universal HVACR control compatibility.
• Heavy-duty construction helps mitigate the humming and vibration prevalent in lower-quality replacements.
• Compact open-frame design facilitates better heat dissipation in cramped electrical control boxes.

Common Questions

• How do I wire this for 208V vs 240V? Always consult the specific wiring diagram on the unit's label; typically, multi-tap transformers use specific color-coded leads (often orange or red) to select between 208V and 240V primary legs.
• Can this be used to replace a 30VA transformer? Yes, stepping up to a higher VA rating (40VA) provides more capacity and is a safe practice, whereas using a lower VA rating would cause overheating and failure.
• Why is my transformer humming? Loud humming often indicates loose mounting or a secondary circuit overload that's drawing more than the rated 1.6 amps.

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.