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Ranco O16-111 HVAC control box with 72 inch capillary tube

Ranco

Ranco O16-111 HVAC control SPDT 0 to 55°F

SKU CH-MT2Q-X889F

Adjustable SPDT temperature control for refrigeration and freezer systems with 72 in capillary, 0 to 55 °F range and 17 A full-load rating

  • Adjustable 0 to 55 °F range for precise refrigeration control
  • SPDT contact form switches both heating and cooling circuits
  • 72-inch capillary allows flexible sensor placement in tight spaces
  • 17 A full-load current handles heavy compressor loads directly
  • Constant cut-in design maintains consistent evaporator temperature

Temperature range and application

The Ranco O16-111 is a constant cut-in refrigeration control designed for commercial freezers and cold storage. It operates across a 0 to 55 degrees Fahrenheit range with adjustable cold on and cold off settings. The SPDT contact form handles full load current of 17 amps and locked rotor amps of 102 amps.

Sustained load behaviour

Under continuous operation the control maintains consistent cycling through its capillary sensing element. The 72-inch capillary provides remote temperature sensing while the constant cut-in design prevents short cycling during extended run periods. Seven adjustment screws allow precise calibration for stable long-term performance.

Replacement scope and upgrade value

This unit replaces failed constant cut-in controls in existing refrigeration systems where the capillary length and temperature range match. The upgrade is worthwhile when the original control has drifted out of calibration or when the contact assembly shows wear from repeated high-amperage cycling. Builders needing different temperature spans or capillary lengths should look elsewhere.

Highlights

  • Adjustable 0 to 55 °F range for precise refrigeration control
  • SPDT contact form switches both heating and cooling circuits
  • 72-inch capillary allows flexible sensor placement in tight spaces
  • 17 A full-load current handles heavy compressor loads directly
  • Constant cut-in design maintains consistent evaporator temperature

Specifications

BrandRANCO

Questions about this item

How much heat or noise does the Ranco O16-111 generate when running continuously?

The control itself produces no measurable heat or noise; it simply switches the connected load using its SPDT contacts rated for 17 A full-load and 102 A locked-rotor current.

What additional components are required to install and operate this temperature control?

You need a power source matching the contact rating, wiring to the compressor or heater circuit, and a mounting location for the 72 in capillary bulb that senses temperature.

Will the Ranco O16-111 work with an older refrigeration system that uses a different capillary length?

Yes, the 72 in capillary can be routed to the existing sensing point; the control’s adjustable range of 0 to 55 °F and constant cut-in design suit most legacy refrigeration and freezer applications.

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