Miele Tumble Dryer PDR 944 [EL SOM] – 3N AC 400V 50/60HZ, Stainless steel

An 800 litre drum and a 32–44 kg rated load put the PDR 944 at the top end of a shipboard laundry in a single machine. With a specific energy consumption of 0.52 kWh/kg and a quoted 28 minute programme duration, this vented dryer is built for fast turnaround on heavy batches rather than small domestic-style cycles.

For a vessel designer, the electrical and structural numbers come first. The PDR 944 connects at 3N AC 400V 50/60Hz with a 36 kW electric heater and a total connected load of 37.7 kW, protected by a 63 A fuse rating. Maximum floor load is 3535 N and the net weight is 294.3 kg, rising to a gross weight of 312 kg for transport and lifting calculations. External dimensions of 1640 × 1206 × 1385 mm mean it is a large front loader that needs to be planned into the laundry flow, not treated as a late-stage swap.

Drying performance is framed by evaporation and heat rejection. Maximum evaporation capacity is 37.2 l/hour and heat dissipation into the room is stated at 4 MJ/h, which are the figures the HVAC designer needs to absorb into the laundry ventilation and cooling design. The machine runs at an emission sound pressure level of 63 dB(A) re 20 µPa at the workplace, which helps on noise exposure in a compact onboard laundry. As an exhaust-air system it depends on a correctly dimensioned duct run; that design sits alongside the electrical supply as a primary constraint.

The large 520 mm door opening and 180 degree door opening angle, combined with the front-loader construction, make it practical to handle bulky onboard textiles. Miele publishes benchmark loading examples: up to 16 respirator masks, 6 overalls, 9 over jackets, 4 synthetic duvets, 8 synthetic pillows, 4 down duvets and 8 down pillows in one cycle. For cleaning operations, the drum can take 727 cloths at 22 g each, 168 cotton mops at 40 cm or 145 at 50 cm, and 267 microfibre mops at 40 cm or 188 at 50 cm. Office and stairway mops are quoted at 373 and 248 pieces respectively, and even 5 summer horse blankets are listed, giving a clear picture of the volume in real items rather than abstract kilograms.

Control and lifecycle data matter in a marine context where machines run daily. The PDR 944 carries the M Touch Pro control system, is residual moisture controlled, and is fully programmable, with a stated service life of 40000 drying cycles. A recycling rate of 94% is published, which is relevant for owners looking at end-of-life planning on larger fleets.

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 model fits laundries that can support a 37.7 kW, 3N AC 400V 50/60Hz exhaust-air dryer and need to turn 32–44 kg batches within 28 minutes. It is the wrong choice where duct routing is impossible or where only lower electrical capacities are available; in those cases a smaller or differently heated unit is more realistic. Ordered under Miele material number 11895350 / article number 52944009SOM (designation PDR 944 [EL SOM]).