What information belongs in a chiller maintenance protocol?

A complete protocol includes the basic data of the system (manufacturer, type, serial number), refrigerant details (type, charge, CO₂ equivalent), measured operating values of the refrigeration circuits, the condition of the hydraulics and electrics, tested safety devices, a defect list with photos, and the digital signatures of the parties involved.

Which operating values are documented during chiller maintenance?

Documented values typically include suction pressure, high pressure, suction gas temperature, liquid temperature, discharge gas temperature, and the calculated superheat and subcooling. Additionally, the current draw of compressors and fans, as well as the inlet and outlet temperatures of the secondary refrigerant (water/glycol), are recorded.

What is checked on heat exchangers and hydraulics?

Heat exchangers (evaporator and condenser) are checked for fouling, fin damage, and corrosion. In the hydraulic circuit, technicians check the flow rate, system pressure, pump operation, strainers, and the frost protection concentration (glycol content) of the heat transfer fluid.

When are F-gas records and leak tests relevant?

The obligation for leak testing and record-keeping is governed by the F-Gas Regulation (EU) 2024/573 and depends on the CO₂ equivalent of the refrigerant charge (starting at 5 tonnes of CO₂ equivalent, or 10 tonnes for hermetically sealed systems). Specific intervals and duties must always be determined based on the current regulation and specific system parameters.

Klima & Kälte9

Chiller Maintenance Protocol – Template for Refrigeration & Cooling Systems

Name: ProtocolHero
Brand: ProtocolHero

Regular maintenance of chillers and refrigeration systems ensures operational reliability and optimizes energy efficiency. With our digital template, HVAC and refrigeration technicians can structuredly record all relevant operating values, refrigeration circuits, and safety checks on-site. This allows you to document professional maintenance seamlessly and traceably for operators and inspectors.

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Preview of the “Chiller Maintenance Protocol – Template for Refrigeration & Cooling Systems” template

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Short answer

What is the “Chiller Maintenance Protocol – Template for Refrigeration & Cooling Systems” template for?

Fill out your chiller maintenance protocol digitally. Document operating values, refrigeration circuits, and F-gases in compliance with VDMA 24186-3.

Use case: Klima & Kälte
Captured data: Object, order, and operator details, System specifications, refrigerant type, charge, and CO₂ equivalent, Operating values per refrigeration circuit (suction pressure, high pressure, superheat, subcooling)
Result: A structured form that can be completed directly in the browser and reused in ProtocolHero.

Check the template against the technical, contractual and legal requirements of the specific case. ProtocolHero does not replace professional assessment.

Inhalt der Vorlage

What is Included in the Chiller Maintenance Protocol?

Object, order, and operator details

System specifications, refrigerant type, charge, and CO₂ equivalent

Operating values per refrigeration circuit (suction pressure, high pressure, superheat, subcooling)

Inspection of compressors, fans, and heat exchangers

Hydraulic components, secondary refrigerant, and pump checks

Electrical connections, control systems, and safety chains

Defect log, recommended actions, deadlines, and photo documentation

Secure digital signatures of the technician and operator

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Fill out this template directly in the browser

No install needed — complete the form below, attach photos, and submit. Create a free account anytime to save and reuse your own templates.

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Flexibly adapt the template to the specific chiller, manufacturer guidelines, and your individual service contracts.

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Why Structured Chiller Maintenance is Essential

Chillers and industrial cooling systems are the backbone of many air conditioning and process cooling operations. A system failure often results in costly operational downtime. Structured maintenance extends the lifespan of components, minimizes the risk of refrigerant leaks, and lowers energy costs by maintaining optimal operating points.

Complete documentation also serves as proof of compliance for authorities, insurance companies, and operators. It verifies that the system is operated and maintained according to accepted technical rules and manufacturer specifications.

Ensuring operational reliability and preventing unexpected downtime
Energy efficiency through clean heat exchangers and optimized settings
Compliance with operator obligations and documentation standards (e.g., VDMA 24186-3)
Early detection of gradual refrigerant leaks

System, Refrigerant, and Order Details

Every professional inspection protocol begins with the unique identification of the system and its location. Alongside the basic data of the chiller (manufacturer, model, serial number, year of manufacture), refrigerant data plays a crucial role.

Record the exact refrigerant type, charge weight, and the calculated CO₂ equivalent. This data forms the basis for legally required records and leak detection intervals.

Clear assignment to object, customer, and maintenance contract
Documentation of refrigerant type (e.g., R134a, R32, R1234ze) and charge weight
Recording certification details of the performing specialized personnel

Operating Values and Condition per Circuit

The core of the measurement-based inspection is recording the operating values for each individual refrigeration circuit. Comparing suction pressure, discharge pressure, hot gas temperature, and the calculated superheat and subcooling is the only way to precisely assess the thermodynamic state of the system.

Deviations from the manufacturer's target values quickly indicate issues like fouling, refrigerant shortage, or mechanical wear on the compressors.

Measurement of suction and discharge pressure (incl. corresponding saturation temperatures)
Determination of suction gas superheat and condenser subcooling
Documenting compressor current draw and oil level/temperature

Hydraulics, Electrics, Safety, Defects, and Completion

In addition to the refrigeration circuit, peripheral systems must be checked. This includes the secondary refrigerant hydraulics (pumps, flow switches, glycol frost protection concentration), as well as the electrical equipment and the safety chain (high-pressure limiters, frost protection thermostats).

Finally, detected defects, required repairs, and deadlines are documented. With photos of the system and digital signatures of the technician and operator on-site, the maintenance protocol is securely and transparently completed.

Inspection of heat exchangers (evaporator/condenser) for dirt and corrosion
Functional check of safety and control devices
Documentation of defects, required spare parts, and follow-up appointments

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