High pressure switch 17 bar – 12.5 C.I “NC” R134A – code: A020109A – Climma

Climma high-pressure minipressostat for R134A circuits

The High-pressure minipressostat 17 bar – 12.5 reset “NC” R134A (code A020109A) branded Climma is a control and safety component used in air conditioning and refrigeration systems that use refrigerant R134A, typically in marine and onboard plant applications. It is a high pressure switch designed to monitor the pressure of the refrigeration circuit and manage an electrical consent/interruption based on the set threshold.

In a properly configured system, the pressure switch helps protect the compressor and other components by intervening when the pressure exceeds the expected value. The model is equipped with normally closed (NC) contact, a feature useful in safety logics where opening the contact causes the shutdown or activation of a protection.

Spare part features and details

Product identification

• Product: High-pressure minipressostat
• Brand / line: Climma
• Code: A020109A
• Supplier: VECO S.P.A.
• Indicated refrigerant: R134A
• Contact type: normally closed (NC)

Intervention thresholds (as per product description)

• High pressure intervention: about 17 bar
• Reset: around 12.5 bar

These thresholds are typical for pressure control in R134A circuits and are used to manage protection in case of overpressure. During maintenance or replacement, it is good practice to verify that the thresholds required by the system correspond to those of the replacement part.

Function in the refrigeration circuit

The mini pressure switch operates as a control element for the discharge pressure (high pressure) of the refrigeration circuit. When the pressure exceeds the set threshold, the NC contact changes state (opens), allowing the system logic to:

• interrupt compressor operation;
• activate protection or signaling devices provided by the system;
• contribute to operational safety and continuity of plant operation.

Typical applications

This replacement part is intended for Climma air conditioning systems compatible using refrigerant R134A. It is frequently associated with systems installed in the nautical sector, where the reliability of pressure control components is particularly important for managing operating conditions and protecting the refrigeration circuit.

Where it is used

• air conditioning and refrigeration systems with R134A;
• circuits where control with high pressure safety logic is provided;
• onboard applications and technical contexts where dedicated Climma replacement parts are used.

Operational advantages

In a refrigeration system, the presence of a correctly selected and installed high-pressure switch offers practical benefits in management and maintenance:

• Circuit protection: it helps prevent overpressure conditions that can stress components such as the compressor and discharge lines.
• Safety management: the contact NC integrates with stop/protection logics commonly adopted in technical systems.
• More organized maintenance: a component dedicated to pressure control makes diagnostics clearer when anomalies related to operating pressure occur.
• Identifiable spare part: the reference A020109A it allows targeted replacement when the system requires the same component.

Usage and notes for installation/replacement

The mini pressure switch is a component functional to the system's safety: for this reason, replacement should be carried out by qualified personnel, following the procedures provided for refrigeration and air conditioning systems. In particular:

• Compatibility check: before purchase, check that the system uses R134A and that the requested replacement matches the code A020109A.
• Electrical contact: ensure that the system logic requires a NC contact (normally closed), as indicated for this model.
• Thresholds: verify that the intervention/reset thresholds (about 17 bar and 12.5 bar) are consistent with the system configuration.
• Diagnostics: in case of frequent pressure switch interventions, it is advisable to investigate the causes of high pressure (for example, operating conditions or system components) before replacing the spare part.

Note: this product is indicated as a spare part for Climma systems compatible with R134A. If complete system data (electrical diagram, unit model, configuration) are not available, it is advisable to compare the code and functional specifications with the installed component or with the system's technical documentation.

FAQ – Frequently Asked Questions

What is the high-pressure minipressostat A020109A used for?

It is used to monitor the pressure of the refrigeration circuit on the high-pressure side and to trigger the system protection logic when the pressure exceeds the set threshold.

Is this pressure switch suitable for systems with refrigerant R134A?

Yes. The product is intended for air conditioning and refrigeration systems that use refrigerant R134A.

What type of electrical contact does this model have?

It is equipped with a normally closed (NC) contact, typical of safety logics where opening the contact causes the shutdown or activation of a protection.

What are the indicated intervention and reset thresholds?

The intervention threshold is about 17 bar, with reset around 12.5 bar, as stated in the product description.

Is it a specific replacement for Climma systems?

Yes, it is indicated as a replacement for compatible Climma air conditioning systems that use R134A. For the correct choice, it is advisable to check the code A020109A and the system configuration.