Ranco E15-256 Control

The Ranco E15-256 is a professional-grade heat pump de-ice control designed for precise defrost cycle initiation and termination in residential and commercial split systems. This SPDT (Single Pole Double Throw) controller operates on a 24V circuit and features a 54-inch capillary with a laser-welded stainless steel sensing element for high-accuracy temperature detection. Engineered to eliminate frost accumulation on outdoor coils, it utilizes a timer-initiated mechanism with integrated temperature-permissive logic. The internal interlock prevents redundant cycling by requiring coil temperatures to drop to 28°F or lower before activation. Technicians can field-select timing intervals of 30, 45, or 90 minutes, allowing for flexible optimization based on local environmental conditions and equipment specifications. With an adjustable temperature range of 55°F to 78°F and a fixed 7°F differential, the E15-256 ensures reliable switching performance and protects compressor longevity by maintaining optimal thermal transfer efficiency across the heat pump coil.

• Field-Selectable Timing: Allows contractors to set defrost intervals at 30, 45, or 90 minutes to match specific climate demands.
• Robust Sensing: The 54-inch capillary and stainless steel bulb provide durable, cross-ambient temperature sensing for consistent defrost control.
• System Protection: Integrated interlocked logic prevents multiple defrost cycles within a single time period, reducing unnecessary mechanical wear.
• Wide Compatibility: Designed as a heavy-duty replacement for many Ranco E15 series and competitor heat pump controls.

• What temperature is required to initiate the defrost cycle? The control requires the sensing bulb to detect a temperature of 28°F or lower at the designated initiation point to allow the timer to start a cycle.
• Can the defrost termination temperature be adjusted? Yes, the Ranco E15-256 features an adjustable temperature range from 55°F to 78°F for precision termination.
• Does this unit support 240V applications? No, this specific model is rated for 24V low-voltage control circuits. Verify your system's transformer output before installation.

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.