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Ranco O10-1491 temperature control with 72 in capillary and remote bulb

Ranco

Ranco o10-1491 Temperature Control 25-75°F SPST

SKU CH-8XZ0-6ZFQD

A refrigeration control with a 72-inch capillary and remote bulb, adjustable from 25 to 75 degrees Fahrenheit

  • Adjustable 25 to 75 °F range suits diverse refrigeration needs
  • SPST contact form with 24 A full-load current handles heavy compressor loads
  • 144 A locked-rotor rating withstands high motor-start surges
  • 72 in capillary with remote bulb enables flexible mounting locations
  • Constant cut-in design plus seven adjustment screws simplify precise calibration

Ranco o10-1491 Temperature Control

The Ranco o10-1491 is a constant cut-in refrigeration control designed for HVAC systems requiring precise low-temperature management. It suits technicians and facility managers who need reliable on/off switching for compressors or cooling equipment within a defined range. The single-pole single-throw contact form provides straightforward control logic for compatible applications. This unit operates on a 25 to 75 degrees Fahrenheit adjustable range.

Installation with 72-inch capillary and remote bulb

The control includes a 72-inch capillary tube with a 3/8-inch diameter remote bulb measuring 6 inches in length, allowing flexible placement of the sensing element away from the main housing. Seven adjustment screws are supplied for setting cut-in, cut-out and differential points during commissioning. Careful routing of the capillary is required to avoid kinks or damage that would affect temperature sensing accuracy. The SPST wiring is simple but must respect the 24-amp full-load rating.

25-75°F range with 24-amp capacity

The controller handles a maximum control temperature of 75 degrees Fahrenheit and a minimum of 25 degrees Fahrenheit, covering common refrigeration and cold-storage needs. It supports a full-load current of 24 amps and locked-rotor amps of 144 amps, giving headroom for standard compressor starting surges. Applications demanding temperatures below 25 degrees or above 75 degrees fall outside the calibrated range. Loads exceeding the 24-amp continuous rating require a contactor or larger control.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $99.99
Pricier than about 68% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameRANCO

Questions about this item

How can I verify the Ranco o10-1491 is working correctly after installation?

Set the cold-on and cold-off points within the 25 to 75°F range and confirm the SPST contacts open and close at those temperatures using a multimeter.

What comes with the Ranco o10-1491 and what must I purchase separately?

The control includes seven adjustment screws; you must supply wiring, mounting hardware and a power source rated for the 24 A full-load current.

Which version of the Ranco o10-1491 should I choose for my application?

The single model covers 25 to 75°F with a 72-inch capillary and 3/8-inch by 6-inch remote bulb; select it when that range and bulb size match your refrigeration system.

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