Miele Tumble Dryer PDR 928 [EL SOM] – 3N AC 400V 50/60HZ, Stainless steel

A 500 litre drum and a 28 kg load at a 1:18 ratio put the PDR 928 into the high-throughput end of a shipboard laundry. With a quoted 24 minute programme duration and an evaporation capacity of 27.2 litres per hour, it is sized for constant rotation rather than occasional use.

This variant is designated PDR 928 [EL SOM] and is specified and approved for shipboard use as well as offshore installations. The electrical connection is 3N AC 400V 50/60Hz, which aligns with the multi-frequency systems found on many vessels and avoids the need for conversion equipment. Heat dissipation into the room is 3.3 MJ/h, a figure the HVAC designer has to pick up, and the maximum floor load of 2799 N sits with the naval architect checking deck structure. At 1206 x 1019 mm in plan and 1640 mm high, the unit demands real space in a laundry plan and is not competing with small stacked columns.

Drying performance is defined around both time and energy. Specific energy consumption is 0.51 kWh/kg, and the total connected load is 28.2 kW with an electric heater rating of 27 kW. For a laundry doing multiple 28 kg cycles per watch, that energy figure becomes part of the vessel’s hotel load calculation. The machine is an exhaust-air type, so the published maximum evaporation capacity of 27.2 litres per hour translates into a defined moisture removal and exhaust duct design task.

The Benchmark Performance Plus control package on this unit is M Touch Pro, residual moisture controlled and fully programmable. That means the stopping point is defined by the residual moisture in the load rather than a fixed time, which matters for textiles as varied as 545 cloths at 22 g each, 105 cotton mops at 40 cm, or 3 summer horse blankets in one run. Published example loadings include 12 respirator masks, 3 overalls, 5 over jackets, 2 synthetic duvets, 3 synthetic pillows, 2 down duvets and 5 down pillows, as well as 266 office mops at 100 g and 178 stairway mops at 150 g. Those numbers give a superintendent a realistic sense of what a single batch looks like for different workwear and housekeeping items.

Noise and environment are part of the installation decision. Emission sound pressure level is quoted at 58 dB(A) re 20 µPa, low enough to sit comfortably in a staffed laundry space. Service life is given as 40,000 drying cycles, and the net weight of 243.3 kg, with a gross shipping weight of 258 kg and crate dimensions up to 1766 x 1390 x 1108 mm, are all numbers the yard will need when planning delivery and installation.

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

This is the right dryer where a vessel needs short 24 minute cycles on loads in the 20–28 kg range and has provision for an exhaust-air run and a 28.2 kW, 3N AC 400V 50/60Hz supply. It is the wrong choice for a small crew laundry with only a few kilograms per day or for spaces where ducting exhaust air is not possible. Ordered under Miele material number 11895330 and article number 52928010SOM.