Atlas Copco 1621600103 Oil Cooler For ZR 400-900 VSD

Descripción

El 1621600103 is the oil cooler Atlas Copco builds into the lubrication circuit of its ZR oil-free rotary screw compressors. On an oil-free machine the compressed air path carries no oil, so this exchanger never touches the air side. The 1621600103 cools the sealed lubrication oil that serves the gearbox, the bearings and the rotor timing gears, keeping that oil inside the working band the package was engineered around.

In a ZR oil-free compressor the rotors run without oil in the compression chamber, which is what earns the Class 0 air rating. The machine still needs oil for the moving mechanical parts, and that oil picks up heat as it circulates. The 1621600103 is where that lubrication oil gives its heat up to the cooling side of the exchanger before the oil returns to the bearings and gears.

What the 1621600103 oil cooler does

El 1621600103 is a dedicated oil-to-cooling-medium heat exchanger for the ZR lubrication circuit. Hot oil from the gearbox and bearings enters the unit, crosses the exchanger walls, and leaves at a temperature the package can run on through a long loaded shift. The 1621600103 is the part booked against when that lubrication oil circuit needs a renewed cooler on an oil-free ZR compressor.

A cooler that has lost capacity shows up first as a lubrication oil temperature that climbs under a familiar load. Because the oil services the gears and bearings, a high oil temperature also raises the load on those parts. The part is what keeps the lube oil at the temperature the ZR range was designed to hold, which protects the mechanical train as much as the cooling circuit.

Built for the ZR oil-free compressor range

El 1621600103 is fitted across the larger ZR oil-free models, where the lubrication circuit carries a steady thermal load from the gearbox and bearings. The part is listed for machines such as the ZR 400 VSD, ZR 500 VSD, ZR 450, ZR 750 and ZR 900 VSD, and the same cooler number is the one quoted against those serials. The 1621600103 is confirmed through the machine serial rather than guessed from the family name.

Across the ZR range the air path stays oil-free while the mechanical train is still oil-lubricated, so the cooler serves a circuit that is fully separate from the compressed air. It is the lubrication oil cooler for that sealed loop, and it is the part a workshop renews when the ZR lube circuit needs a fresh exchanger.

How the oil cooler sits in the ZR lubrication circuit

The lubrication oil in a ZR compressor flows from the gearbox and bearings, through the 1621600103, and back to the mechanical train. Heat collected from the gears and bearings is passed to the cooling side of the exchanger, and the cooled oil returns to where it is needed. That is the point in the loop where the lube oil temperature is brought back under control.

Because the oil never enters the air path, the cooler has no effect on the oil-free rating of the compressed air. The 1621600103 works entirely on the sealed lubrication loop, so renewing it keeps the machine oil-free in the air path while restoring the thermal control of the mechanical train. That separation is what lets the ZR hold its Class 0 air quality through a cooler change.

Part identification and build data

El 1621600103 is recorded in the Atlas Copco parts system as an oil cooler with the origin listed as Sweden. The part carries the tariff code 84195080 that applies to heat-exchange units of this type. The 1621600103 is the number to quote when ordering a replacement lubrication oil cooler for the ZR models it fits.

Application and fitted ZR models

El 1621600103 is the lubrication oil cooler fitted to the larger ZR oil-free compressors, where the gearbox and bearing load is high enough to need a dedicated exchanger. The table below lists the models this cooler is quoted against, read from the application range supplied for the part.

Dimensions and weight

Each 1621600103 measures 770 mm in length, 240 mm in width and 390 mm in height, with a weight of 45 kg. The 770 mm length is the body of the exchanger, and the 240 × 390 mm face is the surface to protect during handling and storage. The 1621600103 presents to the original mounts in the compressor bay without adaptation when it is the cooler specified for that position.

Materials and construction

El 1621600103 is built as a sealed oil exchanger with its ports and mounting points in the positions the ZR range was engineered for. Nothing on the unit needs adjustment before fitting, and the cooler arrives with its connections in place as one exchanger ready to present to the original mounts. The 1621600103 is supplied as a complete unit against the compressor it belongs to.

The body is sized for the lubrication oil flow of the larger ZR models, so the exchanger handles the thermal load of the gearbox and bearings without starving the circuit. The 1621600103 is the production cooler for that position, which means the renewal restores the original cooling capacity rather than a makeshift fit.

Fitment and replacement

Replacing the 1621600103 starts with reading the number on the cooler being removed, then noting the model and serial from the compressor nameplate. The parts record for that serial names the lubrication oil cooler built into its circuit, so the fitment is confirmed rather than assumed. The 1621600103 is the line booked against for the ZR models listed above.

Plants that run several oil-free machines keep the model, the serial and the cooler number together in one record per machine. That record turns the next renewal of the 1621600103 into a single confirmed message, and it keeps the dimensions of the body with the part number for the next fitter. A clean record also avoids ordering the wrong cooler across a mixed ZR fleet.

Sourcing and verification

When you need a 1621600103, send the machine model and serial so the fitment is checked against the build record before the order is placed. Where the old label has worn away, the nameplate is enough on its own, because the parts list for the serial settles the match. The 1621600103 is confirmed that way, and the current package details are settled with the quotation.

Buying against the verified part number protects the oil-free operation of the compressor, since the cooler serves the lubrication loop that the mechanical train depends on. The 1621600103 ordered this way is the correct exchanger for the ZR models it fits, with the origin and tariff recorded as supplied.

Preguntas frecuentes

What is the 1621600103 oil cooler used for?

El 1621600103 is the lubrication oil cooler in the ZR oil-free compressors, cooling the sealed oil that serves the gearbox, bearings and rotor timing gears. It works on the oil circuit only, so it does not touch the oil-free air path.

Which ZR compressors use this oil cooler?

El 1621600103 fits the larger ZR oil-free models, including the ZR 400 VSD, ZR 500 VSD, ZR 450, ZR 750 and ZR 900 VSD. The fitment is confirmed against the machine serial rather than guessed from the family name.

Does this cooler affect the oil-free air rating?

No. The 1621600103 cools the mechanical lubrication oil, which is fully separate from the compressed air. Because the oil never enters the air path, renewing the cooler keeps the ZR at its Class 0 oil-free air quality.

What are the dimensions and weight of the cooler?

Each 1621600103 measures 770 × 240 × 390 mm and weighs 45 kg. The 770 mm figure is the length of the body, and the 240 × 390 mm face is the surface to protect during handling.

Is the 1621600103 the same as an aftercooler?

No. The 1621600103 is the oil cooler for the lubrication circuit, while an aftercooler would treat the compressed air. On the ZR the air path is oil-free, so this part is the lube-oil exchanger only.

How do I order the correct oil cooler?

Read the number on the cooler being replaced, which reads 1621600103, and note the model and serial from the compressor nameplate. Send both to Seadweer and the fitment is confirmed before the order is placed.

More Atlas Copco Coolers Available

Other Atlas Copco coolers beyond those listed above can also be arranged on request. Check the table below, or reach out to us for the full picture.