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Ranco o16-624 low-pressure thermostat, compact metal housing with flare fitting

Ranco

Ranco o16-624 Low Pressure Thermostat 12-80 psi

SKU CH-PF9H-HBHBM MPN o16-624

Low-pressure control switch opening on fall from 12 to 80 psi with automatic reset

  • TypeLearning Thermostats
  • Controls pressure from 12 in Hg to 80 psi
  • SPST contacts switch open on falling pressure
  • Automatic reset restores operation without manual intervention
  • Rated for 120, 240, 24 and 277-600 V AC supplies
  • NEMA 1 enclosure suits indoor installations

Low-Pressure Thermostat for HVAC Systems

The Ranco o16-624 is a single pressure control designed for low-pressure monitoring in HVAC applications. It operates across a pressure range of 12 in Hg to 80 psi with an adjustable differential between 5 psi and 38 psi. The switch features SPST contacts that open on pressure fall and reset automatically. A 1/4 inch female flare connection provides the pressure inlet.

Suited for Automatic Reset Protection

This control suits technicians maintaining refrigeration or air conditioning equipment requiring low-pressure cut-out with automatic restart. The NEMA 1 rating limits use to indoor, dry locations. Installers needing a manual reset for safety lockout or a control rated for outdoor enclosures should look at alternative devices.

Pressure Range 12 in Hg to 80 psi

The operating window of 12 in Hg minimum to 80 psi maximum determines compatibility with the specific refrigerant and system design. Verify the system's normal operating pressures and desired cut-out points fall within these limits before installation. The control supports 24V, 120V, 240V, and 277-600V AC circuits.

Highlights

  • Controls pressure from 12 in Hg to 80 psi
  • SPST contacts switch open on falling pressure
  • Automatic reset restores operation without manual intervention
  • Rated for 120, 240, 24 and 277-600 V AC supplies
  • NEMA 1 enclosure suits indoor installations

Specifications

BrandRanco
Modelo16-624
TypeLearning Thermostats

Questions about this item

How much power does the Ranco o16-624 draw when it runs continuously?

The control operates on 120V AC, 240V AC, 24V AC or 277-600V AC circuits and uses an SPST contact rated for those voltages.

What pressure fitting must I already have on my line for the o16-624 to connect?

A 1/4 inch female flare connection is required to match the control's pressure port.

Will the automatic reset on the o16-624 interfere with an older manual-reset safety switch on the same circuit?

The control resets automatically after pressure rises above the differential, so it will not stay open like a manual-reset device.

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