Miele Washing Machine PWM 927 [EL DV DD SOM] – 27 kg, 3N AC 400V 50HZ, Stainless steel

Twenty-seven kilograms at a 1:9 load ratio in a 240 litre drum puts the PWM 927 into the heavy-duty end of a shipboard or offshore laundry. A spin speed of 1,100 rpm with a quoted g-factor of 541 is there to pull residual moisture down to 46 % after a cold rinse and 41 % after a hot rinse before items move on to the dryers.

The electrical and thermal figures matter once this unit sits in a closed laundry. The PWM 927 is specified at 3N AC 400V 60HZ with a heater rating of 24 kW and a total connected load of 25.6 kW, protected by a 50 A fuse rating. It releases 4.7 MJ/h of heat into the room and has an emission sound pressure level of 73 dB(A) re 20 µPa, so both HVAC and acoustic allowances need to be checked against those values rather than assumed.

Water and energy consumption define the running profile over the 30,000 tested operating hours. With a cold water connection, specific water consumption is 7.4 l/kg, giving 201 litres per cycle, at 0.22 kWh/kg and 5.9 kW per cycle. On a hot water connection, specific water consumption is 7.3 l/kg and total cycle water is 197.9 litres, with specific energy at 0.06 kWh/kg and 1.61 kW per cycle because the thermal lift is shared with the vessel’s hot water system. ECO programmes lower these further: 193.5 litres and 4.48 kWh on cold water, and 190.2 litres and 0.58 kWh on hot water.

Cycle times set how much work a watch can push through. Standard programme duration with a cold water connection is 57 minutes, and 47 minutes with both cold and hot water. The Mops standard 60 °C programme repeats the 57 minute duration on cold water, using 322.2 litres and 6.28 kWh; with hot water it uses 323.4 litres and 2.05 kWh over 47 minutes. ECO programme times come down to 42 minutes on cold and 34 minutes when both cold and hot feeds are connected. Residual moisture when processing cleaning cloths is quoted at 10 %, which is where dryer capacity and energy savings are realised.

Physically this is a substantial machine that has to be set against deck loading and access routes. External dimensions are 1,646 mm high, 1,090 mm wide and 1,226 mm deep, with gross handling dimensions of 1,793 × 1,365 × 1,425 mm. Net weight is 643 kg, gross weight 700 kg, and the maximum floor load is 8,993 N, numbers a naval architect can check against the laundry deck structure. The door opening is 415 mm, opening through 180 degrees on a right-hand hinge, which fixes how trolleys and sorting tables are arranged in front of the machine.

Build and control

• Front loader construction with stainless steel front and stainless steel control panel
• Benchmark series, Performance Plus range with M Touch Pro Plus control system
• Freely programmable controller with remaining cycle time display
• Automatic door lock
• Specified for offshore installations
• Specified and approved for shipboard use
• Independently tested virucidal efficacy and verified hygiene performance
• Thermal disinfection rinse programme with continuous wash temperature monitoring
• EcoSpeed wash rhythm for reduced water use
• Three-dimensional imbalance monitoring
• Detergent drawer with 4 compartments and detergent empty sensor
• Display language switchable at any time
• Cold water inlets: 4 x 1/2" with 3/4" union; hot water inlets: 2 x 1/2" with 3/4" union; optional hard water inlets: 2 x 1/2" with 3/4" union

The stated loading examples underline where this unit fits: up to 142 cotton mops at 40 cm / 190 g, 225 microfibre mops at 40 cm / 120 g, or 620 cloths at 22 g per cycle, plus published capacities for respirator masks, helmets, overalls and summer horse blankets. It is the wrong choice for a vessel that runs only a small volume of personal laundry per day, because a 27 kg drum, a 1:9 loading ratio and a 25.6 kW connection assume a continuous professional workload, not occasional batches. Ordered under Miele designation PWM 927 [EL DV DD SOM], article number 51927001SOM and material number 12887550.