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Brown Ranco O10-2054 pressure control with flare fitting and electrical terminals

Ranco

Ranco O10-2054 Pressure HVAC Control

SKU CH-5Q8P-X17N2

Single-pressure HVAC control switching at 100 to 400 psi with automatic reset and 1/4-inch flare connection

  • Product colorBrown
  • Controls pressure from 100 psi to 400 psi
  • Opens circuit automatically when pressure falls below setpoint
  • Handles 120V, 240V, 24V and 277-600V AC supplies
  • Adjustable differential between 40 psi and 150 psi
  • 1/4-inch flare female connection fits standard HVAC lines

Ranco O10-2054 HVAC Pressure Control

The Ranco O10-2054 is a single pressure control designed for HVAC systems requiring automatic pressure regulation. It operates across a pressure range of 100 psi to 400 psi with an adjustable differential between 40 psi and 150 psi. The control features a SPST contact form that opens on pressure fall. It suits technicians servicing refrigeration or air-conditioning equipment.

Replaces fixed-range pressure switches

This control replaces fixed-range pressure switches when adjustable cut-in and cut-out points are needed across the 100 psi to 400 psi range. The jump is worth it when system pressures vary seasonally or when equipment requires a differential between 40 psi and 150 psi. It is not for installers who need a dual-pressure control or a manual reset function.

Flare connection with automatic reset

Installation uses a 1/4 inch female flare connection compatible with standard refrigerant lines. The control supports rated voltages of 24V AC, 120V AC, 240V AC, and 277-600V AC. Common issues include incorrect differential adjustment causing short cycling and flare leaks if the connection is not properly torqued. The NEMA 1 rating limits use to indoor dry locations.

How it compares

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

Price $75.99
Pricier than about 62% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameRANCO
Product colorBrown

Questions about this item

What size flare fitting does the 1/4 in pressure connection require?

The control uses a 1/4 in female flare connection, so a matching 1/4 in male flare fitting is needed for the refrigerant line.

Which voltage should I wire to the SPST terminals for a 240V AC supply?

Connect the 240V AC circuit to the switch terminals; the control is rated for 120V, 240V, 24V and 277-600V AC, and the SPST contacts open on pressure fall.

How often should the automatic reset function be checked after the control cycles at 400 psi?

The automatic reset operates each time pressure falls 40 to 150 psi below the 100-400 psi set range; inspect the switch action annually or after any high-pressure event.

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