Miele Tumble Dryer PDR 922 [EL SOM] – 3 AC 480V 50/60HZ, Stainless steel

Twenty-three minutes for a standard programme on a 400 l drum is what sets the PDR 922 [EL SOM] apart in a ship’s laundry. At a 1:25 load ratio it is rated for 16 kg, and at 1:18 it will take 22 kg, so one cycle clears a substantial part of a watch’s linen in a single run.

The electrical data sit squarely in a marine context. Connection is 3 AC 440V 50/60HZ with a total connected load of 23.5 kW and a fuse rating of 50 A, so the machine can be designed straight into a 440 V shipboard distribution without conversion equipment. Heat dissipation into the room is quoted at 2.6 MJ/h, a low figure for this capacity that matters in a compact laundry where every kilowatt of rejected heat lands on the HVAC plant.

This is an exhaust-air dryer, with a maximum evaporation capacity of 22.3 l/hour and a specific energy consumption of 0.5 kWh/kg. For a superintendent planning duct routing, that evaporation rate is a sizing figure for the extract. The unit is specified and approved for shipboard use and also specified for offshore installations, so the 62 dB(A) emission sound pressure level and 2521 N maximum floor load come with enough detail for a naval architect to check against the space.

Physically the PDR 922 stands 1400 mm high on a 906 mm by 1162 mm footprint, with a net weight of 198.9 kg. Gross dimensions of 1526 × 1090 × 1254 mm set the clearance envelope for bringing it aboard and through doorways. The large 520 mm door opening with a 180 degree swing and a left-hand hinge gives straightforward access for loading bulky items such as 2 synthetic duvets or 4 down pillows per cycle, as indicated by the published capacity guidance. For workwear, the table runs from 16 respirator masks to 3 overalls and 5 over jackets; for cleaning textiles, up to 364 cloths at 22 g or 84 cotton mops at 40 cm in one load. Those examples let a chief housekeeper translate the nominal kilogram rating into real stowage.

The machine is built around Miele’s Benchmark Performance Plus platform, with an M Touch Pro control system that is fully programmable and a residual moisture controlled user interface. Service life is stated at 40000 drying cycles, which is the planning horizon for a ship on a multi-year deployment. Heat into the room is modest for the throughput, and a recycling rate of 91 % is published for those working to corporate sustainability reporting.

Build and control

• Specified for offshore installations
• Specified and approved for shipboard use
• Remaining cycle time display
• Communication slot for network modules
• Prepared for a payment system (self-service laundries)
• Optical service interface for diagnostics
• Can be tied into a peak-load / energy management system
• WiFi networking
• Connector Box for external systems

The PDR 922 is the right choice where a vessel needs fast turnaround on 16 to 22 kg loads in a dedicated laundry running many short cycles per day, and has an exhaust duct route available. It is the wrong unit where hull penetrations for exhaust air are not acceptable or where heat-pump drying is mandated; in those cases a condenser or heat-pump variant from the same family should be considered instead. Ordered under Miele article number 52922006SOM / material number 11722710.