This document provides operating instructions for the Miele Commercial Dishwasher PFD 408, covering its functions, technical specifications, usage, and maintenance.
Function Description
The Miele PFD 408 is a commercial dishwasher designed for efficient and powerful cleaning in various commercial environments, including senior living facilities, hospitals (NSF 3 classified models), restaurants, pubs, hotels, and guesthouses. It offers short program cycle times and robust cleaning performance. The machine is intended for stationary, indoor use only and is specifically designed for cleaning wash items such as glasses, cutlery, and dishes. It is not intended for cleaning medical devices.
The dishwasher features multiple dispensing systems for process chemicals, including a door dispenser for powder cleaning agents and tabs, and external dispenser modules (DOS modules) for liquid cleaning agents and rinse aid. The water softener automatically reactivates at regular intervals using special reactivation salt to ensure optimal cleaning results, especially in areas with hard tap water.
Key operational features include:
- Program Selection: A variety of programs are available, such as Normal, Normal Plus, Intensive, Rapid, Cold, and Drain, to suit different types of wash items and soiling levels.
- Timer Function: Programs can be started using a timer, allowing for delayed starts or setting a specific finish time, which can be beneficial for optimizing energy consumption during off-peak hours.
- Drying Functions: Depending on the model, the dishwasher may include "Dry+" active drying, which uses a fan to convey filtered fresh air into the wash cabinet, accelerating and improving the drying process. The "AutoOpen" function slightly opens the door at the end of a program to allow residual moisture to escape, further aiding drying. "AutoClose" ensures the door is drawn into its final closed position and mechanically locked after closing.
- Water Hardness Adjustment: The water softener can be adjusted to match the local water hardness level, ranging from 0 to 70 gpg (0–70°dH), to prevent calcium deposits.
- Dispensing Concentration: The concentration of liquid process chemicals can be adjusted for all dispensing systems and programs.
- A0 Value Display: For models where it is activated, the dishwasher can display an A0 value at the end of a program, indicating the destruction of microorganisms with moist heat, though it is not a medical device and the value is for indication only.
- User Profiles: The system supports "Daily operators" and "Experienced operators," with the latter having access to PIN code-protected settings for modifying program parameters and blocking access to certain functions.
- Networking/WiFi: The dishwasher is equipped with an integrated WiFi module, allowing connection to a local network for digital solutions from Miele, including remote updates.
Important Technical Specifications
- Dimensions:
- Height with machine lid: 32 7/8" adjustable + 2 1/4" (835 mm adjustable + 60 mm)
- Height without machine lid: 32 5/16" adjustable + 2 1/4" (820 mm adjustable + 60 mm)
- Width: 23 1/2" (598 mm)
- Depth: 23 1/2" (580 mm)
- Depth with door open: 47 1/4" (1,180 mm)
- Weight (net): Approx. 154 lbs (70 kg)
- Water Connection:
- Water temperature: Max. 68°F (20°C) for cold water/steam condenser (optional), Max. 149°F (65°C) for hot water.
- Static water pressure: Max. 145 psi (1,000 kPa overpressure)
- Minimum water connection flow pressure: 14.5 psi (100 kPa overpressure) for cold water/steam condenser (optional), 5.8 psi (40 kPa overpressure) for hot water.
- Recommended water connection flow pressure: 29 psi (≥ 200 kPa overpressure) for cold/hot water, 14.5 psi (≥ 200 kPa overpressure) for steam condenser (optional).
- Water inlet hose length: Approx. 5' 7" (1.7 m)
- Drainage:
- Drain hose length: Approx. 4' 9" (1.5 m)
- Delivery head: Min. 1' (0.3 m), max. 3' 3" (1.0 m)
- Drainage length: Max. 13' 1" (4.0 m)
- Discharge rate: At least 4.2 gpm (16 l/min)
- Operating Conditions:
- Ambient temperature: 40 - 104°F (5°C to 40°C)
- Maximum relative humidity: 80% for temperatures up to 88°F (31°C)
- Electrical Connection: Voltage, rated load, and fuse rating must match the data plate. The appliance must be grounded.
- WiFi Standard: 802.11 b/g/n
- WiFi Frequency Band: 2,400-2,483.5 MHz
- Maximum WiFi Transmission Power: < 100 mW
- Protection Category: IP21 (according to IEC 60529)
- Noise Emission Values (undercounter installation with wooden trim in front of toe-kick, Short program):
- Sound power in LwA: 59 dB (A)
- Sound pressure in LpA: 47 dB (A)
Usage Features
- Touch Display Control: Operation is primarily via a touch display and sensor controls on the control panel, providing intuitive navigation and selection.
- Basket System: The dishwasher is equipped with upper and lower baskets designed for various wash items. The upper basket can be adjusted in height to accommodate taller items in either basket. Special inserts and cutlery baskets are available for optimized loading.
- Door Lock Mechanisms: Depending on the model, the dishwasher features either a Comfort Door Lock with an electronic release button or a pull-open lock. The Comfort Door Lock automatically pulls the door into a sealed, locked position. An emergency release mechanism is available for power failures.
- Process Chemical Dispensing: Cleaning agents can be dispensed in powder, tab, or liquid form. Rinse aid is dispensed to prevent water spots and aid drying. Refill indicators alert users when salt, cleaning agent, or rinse aid canisters are low.
- Program Customization: Experienced operators can modify program parameters such as wash temperature, main wash holding time, final rinse temperature, final rinse holding time, and increased water quantity. They can also activate or deactivate an interim rinse block for selected programs.
- Favorites: Users can define and order their favorite programs for quick access on the program selection screen.
- PIN Code Protection: Access to advanced settings and machine functions can be protected by a PIN code to prevent unauthorized changes. A door lock code can also be set to require a PIN for opening the door during a running program.
- Language Selection: The display language can be selected during commissioning.
- Display Brightness and Volume: The brightness of the display and the volume of keypad tones and buzzer tones can be adjusted.
- Welcome Tone: A brief melody plays when the machine is switched on and off, which can be enabled or disabled.
Maintenance Features
- Regular Maintenance: Miele recommends annual maintenance by Miele Customer Service to prolong the dishwasher's service life. This includes checking the door mechanism, seals, connections, dispensing systems, spray arms, filter combination, drain pump, non-return valve, and baskets.
- Filter Cleaning: The filter combination in the wash cabinet (coarse, flat, and micro-fine filters) must be checked and cleaned regularly to prevent blockages and ensure proper operation. A "Filter program lock" can be activated to prevent programs from starting if the micro-fine filter is incorrectly inserted or missing.
- Spray Arm Cleaning: The three spray arms should be checked and cleaned regularly to remove food particles that may clog the jets and bearings.
- Air Filter Replacement: For models with Dry+ drying, the air filter needs to be replaced at regular intervals, with a message appearing on the display when a change is due. The filter interval can be reset after replacement.
- Water Inlet Filter Cleaning: A filter in the water intake valve protects against soiling and needs to be cleaned if water flow is insufficient.
- Drain Pump and Non-Return Valve Cleaning: If water is not pumped away at the end of a program, the drain pump or non-return valve may be blocked and needs to be cleaned.
- Wipe Lock: The display can be locked during cleaning to prevent accidental operation.
- Cleaning the Machine: Instructions are provided for cleaning the control panel, machine front (stainless steel), wash cabinet, and door/door seal using suitable cleaning agents.
- Log Book: The dishwasher logs consumption data for water and process chemicals, as well as operating hours and program sequences, which can be used by Miele Customer Service for service interval recommendations.
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