Ranco
Ranco O10-1401 Pressure HVAC Control
A single-pressure HVAC control with a range from 12 in Hg to 50 psi and automatic reset
- Single-pressure control simplifies HVAC system installation
- Pressure range from 12 in Hg to 50 psi covers diverse applications
- Adjustable differential between 5 psi and 35 psi allows precise tuning
- Automatic reset restores operation without manual intervention
- Rated for 120V, 240V, 24V and 277-600V AC supplies
Product identity and target use
The Ranco O10-1401 is a single pressure control designed for HVAC systems. It operates across a pressure range from 12 in Hg minimum to 50 psi maximum with an adjustable differential of 5 to 35 psi. The SPST switch opens on pressure fall and features automatic reset. Rated for 120V AC, 240V AC, 24V AC and 277-600V AC, it suits technicians maintaining refrigeration or air-conditioning equipment.
Installation checks
Verify that the system uses a 1/4 inch male flare pressure connection compatible with the control. Confirm the operating voltage matches one of the rated values: 120V AC, 240V AC, 24V AC or 277-600V AC. Ensure the required pressure range and differential fall within the 12 in Hg to 50 psi span and 5 to 35 psi differential. The NEMA 1 rating means the enclosure is for indoor use only.
Replacement scope
This control replaces an existing single pressure switch with the same SPST open-on-fall action and automatic reset. The upgrade is worthwhile when the current device cannot cover the full 12 in Hg to 50 psi range or the 5 to 35 psi differential spread. It is not suitable for applications requiring a different contact form, manual reset, or a NEMA rating higher than 1.
Highlights
- Single-pressure control simplifies HVAC system installation
- Pressure range from 12 in Hg to 50 psi covers diverse applications
- Adjustable differential between 5 psi and 35 psi allows precise tuning
- Automatic reset restores operation without manual intervention
- Rated for 120V, 240V, 24V and 277-600V AC supplies
Specifications
| Brand | RANCO |
|---|
Questions about this item
Does the Ranco O10-1401 come with a flare fitting or do I need to buy a 1/4 in flare adapter separately?
The control has a male 1/4 in flare pressure connection built in; no separate adapter is required for standard flare tubing.
Should I choose the 120V AC, 240V AC, 24V AC or 277-600V AC version for my system?
The single unit is rated for all listed voltages — 120V, 240V, 24V and 277-600V AC — so one model covers every supply option.
What does the 50 psi maximum pressure mean when the control is installed on a live refrigerant line?
It sets the upper limit of the operating range; the switch will open on pressure fall anywhere between 12 in Hg vacuum and 50 psi, with a differential adjustable from 5 to 35 psi.
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