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When experienced Kühler maintenance staff walk into a mechanical room, the first thing they usually check isn’t the piping or the gauges. It’s the chiller nameplate. That little plate tells them almost everything they need to know before they even open the panel.
 
Funny thing is, a lot of operators and even some maintenance technicians ignore it. They’ll run around chasing alarms or guessing about refrigerant charge when the information was literally bolted to the machine the whole time.
 
Reading the nameplate is step one. Whether you’re installing a new unit, troubleshooting an old one, or just figuring out if the system can handle a new process load, that plate is your first reference point. Let’s go through what’s on it and why it matters.

Manufacturer & Certification Marks

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First up, the name. But it’s more than branding. If technicians see the builder, they already know what kind of controls or refrigerant to expect. Right next to the logo you’ll often see marks like UL, CE, or CSA. Those logos tell you the unit passed certain tests.

Model Number & Serial Number

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The model number gives you the family tree of the machine. You can usually tell the size, series, and sometimes even the configuration just from that. The serial number is more personal. Think of it as the birth certificate.
 
When you call the chiller factory about an equipment failure, the first thing out of their mouth is, “What’s the serial?”  If you don’t have it, you’re basically stuck. Spare parts, wiring diagrams, compressor type—it all comes back to that number.

Kühlleistung

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This is the line that most plant managers look for. Cooling capacity shows up in tons, kW, or BTU/hr. But here’s the catch: it’s not always the number you’ll see in real life. The value on the nameplate is based on standard test conditions. Change the entering water temp or the ambient, and capacity shifts.
 
A crew once installed a chiller rated at 100 tons thinking it would cover their process. On paper it looked fine. In reality, with warmer process water, it only gave them 80. That shortfall hurt production until they rented a temporary unit.

Spannung, Phase, and Frequency

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This part looks simple, but it bites a lot of people. The nameplate tells you exactly what voltage and phase the chiller expects. It also lists the frequency, 50 or 60 Hz.
 
A brand-new unit was once wired into the wrong supply because nobody double-checked. The motors overheated, breakers tripped. In fact, only ten minutes with the chiller nameplate would have saved three days of downtime.

Refrigerant Type

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The refrigerant type tells you what’s inside and what you need to service it. R134a, R410A, or sometimes one of the newer low-GWP blends. Mixing refrigerants or using the wrong type can lead to compressor failure.
 
It also matters for regulations. If you see an older refrigerant on the plate, like R22, you immediately know the unit is either vintage or has been retrofitted. That changes how you plan for maintenance and replacement.

Maximum Operating Pressure

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This number lists the max safe pressure for the system. High side and low side. These aren’t just numbers—they’re safety limits. If your gauges or hoses aren’t rated for those numbers, you’re in dangerous territory.

Flow Rate & Temperaturbereich

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Not every plate lists this, but when it does, pay attention. Recommended flow rate and temperature range tell you how the system was designed to operate. Too little flow and the evaporator can freeze. Too much and you’re wasting pump energy.

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Why Reading the Chiller Nameplate Matters？

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Most operators don’t think about the nameplate until there’s a problem. That’s a mistake. It should be the first reference, not the last.

Correct Installation

Getting installation right means matching power supply, flow, and cooling load to what the plate says. Skip that check and you risk long delays when something doesn’t line up.

Troubleshooting

When alarms show up, the serial number links you to manuals and factory records. Cooling capacity gives you a benchmark for performance. Refrigerant type sets the expectations for operating pressures.

Improving Safety

Pressure ratings, certifications, and electrical details are all about safety. Reading them prevents accidents.

Wartung & Spare Parts

Ever tried to order a replacement pump or valve without the model and serial? It’s a nightmare. With those numbers, you get the right parts the first time. Without them, you’re guessing.

Schlussfolgerung

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Looking for the right industrial chiller for your new project? LNEYA has prepared air-cooled and water-cooled units with various performance levels.
 
Looking to customize the equipment that best suits your unique application? LNEYA also offers custom services. We can meet your various requirements.
 
Contact us today!