Miele Washing Machine PWM 909 [EL DP DD SOM] – 9 kg, 3N AC 400V 50HZ, Stainless steel

A 9 kg load at a 1:9 load ratio in an 80 l drum defines the working envelope of the PWM 909. Spinning at 1300 rpm with a g‑factor of 518, it is specified to leave 47 % residual moisture after a cold rinse and 44 % after a hot rinse, which fixes the starting point for drying time and heat load downstream.

Programme times and consumption figures decide whether this size of machine can keep up with the ship’s linen flow. On a cold-water connection the main programme runs for 49 minutes, using 56.2 l of water and 1.2 kW of energy. With both cold and hot water connected, the duration drops to 45 minutes with 59.3 l of water and 0.23 kW of energy. Where the vessel has a hot utility water loop, those figures show how preheating outside the washer takes work off the 7.95 kW internal heater and the 8.2 kW total connected load.

The ECO programme gives a shorter cycle for lightly soiled loads. With a cold-water connection it uses 49.7 l and 0.82 kW over 34 minutes; with cold and hot water connected it takes 52 l and 0.14 kW over 32 minutes. Tested operating hours are quoted at 30000, putting the machine in a long-duty bracket for marine and offshore service. EcoSpeed wash rhythm, continuous wash temperature monitoring and the thermal disinfection rinse programme sit against that duty expectation rather than a purely light-commercial pattern. Heat dissipation into the room is specified as 2.3 MJ/h, a fixed contribution to the HVAC load that has to be absorbed in an enclosed laundry.

Electrical connection is 3N AC 400V 50HZ with a total connected load of 8.2 kW and a 16 A fuse rating. That profile fits a three-phase 400 V distribution where the laundry is one of several steady consumers. The maintenance-free synchronous motor, heavy-duty heater element and three-dimensional imbalance monitoring align with the 30000 hour figure. The machine is specified for offshore installations and specified and approved for shipboard use, so marine suitability is explicit rather than inferred.

External dimensions of 1020 × 700 × 718 mm (H×W×D) and a net weight of 140 kg define a compact footprint, but the key engineering number is the 2421 N maximum floor load for deck structure checks. Gross dimensions of 1214 × 750 × 817 mm and a gross weight of 152 kg set the clearances and handling capacity needed to move the unit through hatches and passageways. The emission sound pressure level of 65 dB(A) re 20 µPa is relevant where the laundry sits close to cabins or workshops.

The specified load examples translate the 9 kg rating into real work. One cycle can take 204 cloths at 22 g, 42 cotton mops at 40 cm / 190 g, 33 cotton mops at 50 cm / 220 g, 66 microfibre mops at 40 cm / 120 g or 43 microfibre mops at 50 cm / 170 g. For PPE and cabin textiles, the drum will take 4 respirator masks, 2 helmets, 1 overall, 2 over jackets, 1 synthetic duvet, 2 synthetic pillows, 1 down duvet, 2 down pillows or 2 summer horse blankets.

Build and control

• Automatic door lock
• Maintenance-free synchronous motor
• Specified for offshore installations
• Specified and approved for shipboard use
• Remaining cycle time display
• Detergent empty sensor
• Three-dimensional imbalance monitoring
• Thermal disinfection rinse programme
• EcoSpeed wash rhythm for reduced water use
• Continuous wash temperature monitoring
• Heavy-duty heater element
• Laundry can be added mid-cycle

This washer suits marine and offshore laundries that need a 9 kg Benchmark Performance Plus unit with 30000 tested operating hours, thermal disinfection and a 3N AC 400V 50HZ electric connection. It is the wrong choice where the vessel cannot provide a 16 A three-phase 400 V supply, or where the laundry design clearly calls for a bigger load class than 9 kg per cycle. Ordered under Miele material number 11959820 (article 51909004SOM, model PWM 909 [EL DP DD SOM]).