Ranco

Ranco is a manufacturer of temperature controls and refrigeration controls for commercial refrigeration, HVAC, and food service equipment, now operating under Robertshaw, which acquired the Ranco brand. Ranco produces the ETC Series electronic temperature controls, a line of programmable digital controls for refrigeration cases, walk-in coolers, walk-in freezers, and food service equipment. Ranco ETC Series controls operate on 120V, 208/240V, or 24V AC power, with an operating range from -30 degrees Fahrenheit to 220 degrees Fahrenheit. The ETC Series uses an LCD display, EEPROM memory for setpoint retention during power loss, and an anti-short-cycle timer to protect compressor equipment from rapid cycling. Ranco ETC controls are available in NEMA 1 and NEMA 4X enclosures. For refrigeration contractors and food service equipment technicians, Ranco ETC Series electronic temperature controls provide programmable setpoint control with sensor-based monitoring on refrigeration and HVAC applications.

Product Lines

Ranco ETC Series Electronic Temperature Controls

The Ranco ETC Series is a line of electronic temperature controllers designed for commercial refrigeration cases, walk-in coolers, walk-in freezers, and food service equipment temperature management. ETC Series controls are available in single-stage and two-stage configurations for cooling and heating applications. The ETC Series operates on 120V, 208/240V, or 24V AC power supply inputs, covering the range of electrical service configurations encountered in commercial refrigeration and light commercial HVAC installations. Ranco ETC controls carry a load rating of 16 amps at 120V and 8 amps at 208-240V for direct control of refrigeration compressors and fan motors.

ETC Series Control Features

Ranco ETC Series electronic temperature controls include a backlit LCD display for setpoint and temperature readout. EEPROM memory retains programmed setpoints through power loss events. An anti-short-cycle timer prevents compressor damage from rapid on-off cycling. The control differential is adjustable from 1 degree Fahrenheit to 30 degrees Fahrenheit. Ranco ETC Series controls include a defrost function for refrigeration applications requiring periodic defrost cycles. The control temperature range spans -30 degrees Fahrenheit to 220 degrees Fahrenheit.

ETC Series Sensor and Enclosure Options

Ranco ETC Series temperature controls use an external temperature sensor for refrigeration and HVAC monitoring. The sensor is IP67-rated for dust and water protection and is rated for remote sensing up to 400 feet from the control. Ranco ETC controls are available in NEMA 1 enclosures for indoor dry-location installation and NEMA 4X enclosures for applications requiring protection against wash-down or moisture exposure.

Why Technicians Specify Ranco

Refrigeration and food service technicians specify Ranco ETC Series temperature controls for commercial refrigeration applications. The ETC Series provides a programmable setpoint range, EEPROM memory, and sensor flexibility. The Ranco ETC Series covers a -30 degrees Fahrenheit to 220 degrees Fahrenheit control range, making it applicable across walk-in coolers, walk-in freezers, and food service warming equipment. The anti-short-cycle timer protects compressor equipment from rapid cycling. The IP67-rated sensor supports remote mounting up to 400 feet from the control body. NEMA 1 and NEMA 4X enclosure options allow Ranco ETC controls to be specified for dry indoor installation or wet-environment wash-down applications. The ETC Series operates on 120V, 208/240V, or 24V AC, covering the range of electrical service found in commercial refrigeration and light commercial HVAC.

How to Choose a Ranco ETC Series Product

The most important decision variables when specifying a Ranco ETC Series temperature control are supply voltage, load type, enclosure requirement, and temperature range.

Supply voltage is the first selection point. Ranco ETC Series controls are available in 120V, 208/240V, and 24V AC configurations. Confirming the supply voltage before specifying avoids incompatible installations.

Load type determines the required amp rating. Ranco ETC Series controls are rated for 16 amps at 120V and 8 amps at 208-240V for direct control of compressors and fan motors. For loads exceeding these ratings, a contactor is required between the Ranco ETC control and the load.

Enclosure selection follows the installation environment. Ranco ETC controls in NEMA 1 enclosures are appropriate for indoor dry-location mounting. For food service wash-down areas, outdoor refrigeration, or other wet-environment applications, the Ranco ETC NEMA 4X enclosure is the correct specification.

The Ranco ETC Series operating range is -30 degrees Fahrenheit to 220 degrees Fahrenheit. The adjustable differential from 1 degree to 30 degrees Fahrenheit accommodates applications requiring tight temperature control and applications where a wider operating band is acceptable.

The Ranco ETC Series sensor supports monitoring up to 400 feet from the control. Confirming that the sensor wire run does not exceed 400 feet is part of the specification review for installations with remote sensor mounting.

Frequently Asked Questions

Who manufactures Ranco temperature controls?

Ranco temperature controls are manufactured under the Ranco brand by Robertshaw, which acquired the Ranco brand and product line.

What control features do Ranco ETC Series temperature controls include?

Ranco ETC Series electronic temperature controls include a backlit LCD display for setpoint and temperature readout. EEPROM memory retains programmed setpoints through power loss events. An anti-short-cycle timer prevents compressor damage from rapid on-off cycling. The controls also include a defrost function for refrigeration applications requiring periodic defrost cycles.

What is the difference between a Ranco ETC Series NEMA 1 and NEMA 4X control?

Ranco ETC Series temperature controls in NEMA 1 enclosures are rated for indoor dry-location installation. Ranco ETC Series controls in NEMA 4X enclosures are rated for protection against wash-down, moisture, and dust. The NEMA 4X version is the appropriate specification for food service wash-down areas, outdoor refrigeration equipment, or other environments where the control may be exposed to water or moisture.

What is the temperature range and control differential of a Ranco ETC Series control?

The Ranco ETC Series electronic temperature control operates across a range from -30 degrees Fahrenheit to 220 degrees Fahrenheit. The control differential is adjustable from 1 degree Fahrenheit to 30 degrees Fahrenheit. A tighter differential setting holds the temperature more precisely at the setpoint, while a wider differential suits applications where a wider operating band is acceptable.

Can a Ranco ETC Series control be used with a remote sensor?

Ranco ETC Series temperature controls support remote sensor placement up to 400 feet from the control body. The sensor is IP67-rated for dust and water protection, allowing sensor placement in the refrigerated space while the control is mounted at a convenient service access location.

What voltage options are available for Ranco ETC Series temperature controls?

Ranco ETC Series temperature controls are available in 120V AC, 208/240V AC, and 24V AC supply voltage configurations. The 120V version handles direct control of loads within the 16-amp rating. The 208/240V version handles loads within the 8-amp rating. The 24V version is designed for low-voltage control applications.