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Kees van der Westen Speedster User And Maintenance Manual
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Kees van der Westen Speedster User And Maintenance Manual

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USER and MAINTENANCE MANUAL
February 2012

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Summary of Contents for Kees van der Westen Speedster

  • Page 1 USER and MAINTENANCE MANUAL February 2012...

  • Page 2: Table Of Contents

    Recommended maintenance scheme ..............17 Replace group seal ....................18 Clean group dispersion plate................18 Regenerate water softener .................19 Maintenance inside the Speedster ................21 Remove body panels ..................21 Replace anti-vacuum valve .................23 Grease wands and check play between nut and ball ..........24 Check jet in group on scale build-up ..............25...
  • Page 3 CONTENTS Technical information ....................46 Dimensions .......................46 Boiler capacity ....................46 Electricity ......................46 Weight ......................46 PID-parameter settings ..................47 Steam/hot water boiler temperature controller ............49 Exchanging jets for different infusion ..............51 Parts included in standard shipment................52 Contact information ....................53 Speedster page 2...

  • Page 4: Parts Identification

    INTRODUCTION Parts identification Figure 1. Showing main operational parts of the Speedster 1. Main switch 2. PID with coffee boiler temperature display 3. Hot water spout 4. 3-way brewing lever 5. 3-way hot water toggle switch 6. Coffee boiler pressure gauge 7.

  • Page 5: Welcome

    An expansion valve in the coffee water system is adjusted to 10-12 Bar at our workshop and a safety valve of 3 Bar in the steam boiler ensure that the pressures in the Speedster cannot exceed safety values.

  • Page 6: Water Quality

    While too much mineral content will hasten damaging lime scale build-up inside your Speedster, an absence of minerals will give your espresso a flat taste while also harming the boilers inside the machine. As a rule of thumb, the amount of total dissolved solids (TDS) in your water should be 100-150 mg/l (=ppm).

  • Page 7: Unpack

    3. Attach the other end of the high pressure hose to the upper tap on the water softener (see figure 2). Tighten with a 20 mm spanner while securing the tap with a 19 mm spanner. Do not use excessive force. Speedster page 6...
  • Page 8 Both handles on water softener are in “9 ‘o clock” position. Washing machine tap is right of figure, Speedster will be to left of figure. 4. Attach the short high pressure hose to the lower tap on the water softener.

  • Page 9: Connect Water Discharge

    Speedster with a 20 mm spanner. The Speedster may be tilted in such a way that it rests on the two hind- legs and the back of the machine, see figure 4.

  • Page 10: Connect Electrics

    230 Volts this is equivalent to approximately 13.5 Amps. We therefore recommend that the machine has its own power circuit breaker. 1. The thinner electrical cord attached to the Speedster is the pump cable and has a special type of connector. Attach the pump cable to the pump motor using the special connectors.

  • Page 11: Using The Machine

    The addition of cold water has as extra advantage that less water from the steam boiler is used for the same amount of liquid thus diminishing the load on the steam boilers heating element. Speedster page 10...

  • Page 12: Steam

    Figure 5. Showing on/off switch and PID-regulator. Procedure to change the coffee boiler temperature 1. Press the P key on the PID shortly. The display will alternating show “SP” (set point) and the currently set temperature value. Speedster page 11...
  • Page 13 2. Press the P key on the regulator until “AL1” appears on the display (it will alternate with the set value of AL1). 3. Press the P key again, the display will now read “AL2”, alternating with the set value for AL2. Speedster page 12...

  • Page 14: Adjust Pump Pressure

    4. To increase the pump pressure turn the screw in the pump housing clockwise. Turn the screw counter-clockwise to decrease the pump pressure. Beware! The set screw is made from brass and is easily deformed. To avoid damage use a screw driver that snugly fits the slot. Speedster page 13...
  • Page 15 When pump pressure exceeds approximately 12 Bar, the expansion valve will open. Increasing the pump pressure further will not result in higher coffee boiler pressure. Do not set the operational pressure above 9 Bar since this will reduce the life-span of valves, etc. in your Speedster dramatically. Speedster page 14...

  • Page 16: Cleaning The Machine

    The remains will soften and can be wiped off easily. NEVER scrape, grind or cut the steam wand or tip since it leads to avoidable damage. Speedster page 15...

  • Page 17: Body

    Removing the filter holder is essential to prevent remnants of cleaning powder to settle between the plunger and housing of the 3-way group valve. 10. Pry the blind filter from the filter holder and replace the filter basket. Speedster page 16...

  • Page 18: Maintenance

    Grease steam wand ball and check play between nut and ball of steam wand; replace nut if necessary  Check restrictor in group on scale build-up Every 2 years  Rebuild steam valve  Clean probes, level and safety Every 5 years:  Replace all solenoid valves Speedster page 17...

  • Page 19: Replace Group Seal

    Wide flat screw driver (or back end of a fork or spoon)  Screw driver no.2 procedure 1. Remove group screen with rubber group seal. 2. Turn out 2 screws holding black POM dispersion plate (see figure 10). 3. Pull down black dispersion plate. Speedster page 18...

  • Page 20: Regenerate Water Softener

    To avoid the precipitation of calcium carbonate from the tap water in your Speedster, a water softener is included in your shipment to capture the calcium carbonate before it reaches your machine.
  • Page 21 Notes Do not use descaling solution (or e.g. vinegar), as you would with a consumer coffee brewing apparatus, because it might damage your Speedster. The aggressive agent may corrode metal and sealing materials of the machine from the inside. Our commercial machines, which are used in bars and restaurants and thus produce up...

  • Page 22: Maintenance Inside The Speedster

    To avoid hazardous situations it is of the utmost importance that repairs are only performed by the manufacturer or another professional when the power cord, pump cord or other electric parts of your Speedster gets damaged or should be replaced for other reasons.
  • Page 23 NOT remove Figure 12. Showing which bolts should be removed to lift upper body panel. During 2012 the upper body panel will be attached with 5 bolts. Speedster page 22...

  • Page 24: Replace Anti-Vacuum Valve

    6. Replace the anti-vacuum valve, do not tighten the brass nut with a lot of force. 7. Put the silicone hose on the valve. 8. Close the steam valve and turn the Speedster “on”. 9. Check the anti-vacuum valve for leakage. If necessary, tighten nut a little more.

  • Page 25: Grease Wands And Check Play Between Nut And Ball

    7. Slide the nut back over the wand, insert the red silicone ring. 8. Screw the nut a few turns onto the valve. 9. Apply 2 drops of Loctite to the threads of the valve. Tighten nut with spanner, do not use excessive force. Speedster page 24...

  • Page 26: Check Jet In Group On Scale Build-Up

    Even when you keep your water softener in excellent condition, a minor amount of scale will still be deposited on the inside of your Speedster. Most ducts within the machine have such dimensions that a little scale will not influence the brewing process. However, the flow restrictor, or jet, within the group head has an opening with a diameter of 0.6...
  • Page 27 21. Check for leakage, first with brewing lever in middle position (line pressure; up to 3 Bar), then in lower position (pump engaged; 9 Bar). 22. When leakage occurs, check if sealing ring in top group head plate is positioned correctly. 23. Replace the plastic cap on group. Speedster page 26...

  • Page 28: Safety Valve On Steam Boiler

     Loctite or Teflon tape Procedure 1. Turn main switch of your Speedster to “off”. 2. Open the steam valve to let off steam, this will relieve the excess pressure in the steam/hot water boiler. 3. In the meantime, remove left and right side panels first, then remove upper body panel.

  • Page 29: Expansion Valve On Heat-Exchanger System

    When the lever is moved to the lower position the pump will be activated. The pump now pressurises the entire coffee water system. The expansion valve and one-way valve is a combined part in the Speedster (see figure 16). The vertical part is the one-way valve, the horizontal part is the expansion valve.
  • Page 30 When the valve cannot be closed at 12 Bar, the sealing disk inside has to be replaced (see below). expansion valve set screw Figure 17. Showing detail of expansion valve and hexagonal opening in set screw. Drain hose is removed from valve. Speedster page 29...
  • Page 31 Replace sealing disk in expansion valve Materials needed  Spanner 16 mm, 21 mm, adjustable  Allen key 5 mm  Small screw driver  Replacement (Viton) sealing disk  Loctite or Teflon tape  Heat resistant, food safe, silicon grease Speedster page 30...
  • Page 32 14. Adjust opening pressure of expansion valve (see previous paragraph). 15. Re-mount the hose to expansion valve. Wiggle the tube a little when fastening the nut, do not over-tighten the nut. 16. Re-mount upper body panel first, then side panels. 17. Open water mains to machine. Speedster page 31...

  • Page 33: Rebuild Valves

    6. Remove the two Allen bolts (5 mm), a spring will push the valve from its base (the base of the valve will remain on the Speedster). Be careful not to lose any parts. The Teflon ring will probably remain in the valve, pry out gently.
  • Page 34 14), and Teflon ring in conical nut of hot water wand. 11. Remount hot water wand with a drop of Loctite. 12. Close steam valve, switch machine “on”. 13. When machine is heated up, use valve and check for leakage. Speedster page 33...

  • Page 35: Clean Probes, Level And Safety

    Two probes are mounted in the hot water/steam boiler. The lower probe checks the water safety level. Power to the heating elements in the Speedster (both hot water/ steam boiler and coffee boiler) is disconnected when water level is lower than this probe.
  • Page 36 14. Apply a drop of Loctite, or a few windings of Teflon tape, on the threads and remount the probes. Use the same technique as when removing. Turn the probes in position: the bent flat ends of the probes should point downwards. Speedster page 35...

  • Page 37: Check O-Ring And Spring In Progressive Pre-Infusion Cylinder

    22. Remount upper body panel first, then side panels. Check O-ring and spring in progressive pre-infusion cylinder A progressive pre-infusion cylinder is incorporated in your Speedster to guarantee a gradual pressure build-up prior to extraction thus allowing for pre-wetting and swelling of the coffee grounds.
  • Page 38 (In fact, the retaining ring that holds the upper end of the cap is not mounted, for that reason, the piston end is not flush with the outside) Speedster page 37...
  • Page 39 MAINTENANCE MANUAL piston retaining ring rubber O-ring spring Figure 25 . Exploded view of progressive pre-infusion cylinder. Speedster page 38...

  • Page 40: Replace All Solenoid Valves

    MAINTENANCE MANUAL Replace all solenoid valves To be sure that the solenoid valves inside your Speedster keep operating properly, it is advised that you replace them every 5 years. The electrical coil outside, and spring and rubber sealing inside, the valve are prone to wear and tear.
  • Page 41 4. Replace plunger, spring and valve. Put a little silicon grease on sealing ring between valve and group. 5. Replace coil, do not over-tighten flat nut. 6. Remount plug. 7. Open water mains, switch machine “on”, check for proper functioning. 8. Remount body panels. Speedster page 40...

  • Page 42: Adjust Brewing Lever

    7. Tighten the two Allen bolts underneath the frame, re-check the position of the lever mechanism (wheel position and parallel alignment with frame). 8. Switch machine “on”. 9. Check lever for proper operation. 10. Remount upper body panel first, then side panels. Speedster page 41...

  • Page 43: Drain All Water When Freezing Is Possible

    Because boiler freeze-up will lead to the need of replacing the affected boiler your Speedster should never be in a freezing environment unless all water is drained from it. Cargo bays in ships and planes are normally not temperature controlled and cannot be trusted to remain above freezing at all times.
  • Page 44 9. Open drain valve on steam/hot water boiler. 10. When water flow stops, tilt the Speedster by lifting the right side to drain remaining water from the steam/hot water boiler until flow stops. 11. Close steam valve.
  • Page 45 25. Tilt the Speedster by lifting the left side, keep machine tilted. 26. In order to drain the heat exchanger, blow air into the “drain hose” on the coffee boiler, water will flow from the opening.

  • Page 46: Maintenance Records

    MAINTENANCE MANUAL Maintenance Records Date Task Comments Speedster page 45...

  • Page 47: Technical Information

    As shipped in crate 82 kg The Speedster can be ordered in a low total power consumption type especially for the single phase 115 VAC, 60 Hz market. The steam boiler heating element power consumption in this machine is interrupted when power is needed by the coffee boiler heating element.

  • Page 48: Pid-Parameter Settings

    Return to: AL Table 1. Shows scrolling sequence of PID and factory value settings of the individual parameters (in degrees Celsius). Highlighted are the parameters and values to change when switching to degrees Fahrenheit: change value for “Sp” last. Speedster page 47...
  • Page 49 When your PID does not respond to unlocking or programming you may reset the PID to the JUMO manufacturer settings by first switching the Speedster “off”. Then, while pressing both the P and ˄ keys on the PID simultaneously, switch the Speedster “on”. Note!

  • Page 50: Steam/Hot Water Boiler Temperature Controller

    TECHNICAL MANUAL Steam/hot water boiler temperature controller The controller can process 2 sensors, “AL1” is not used in the Speedster (value for °C and °F: 127.2), “AL2” is connected to the sensor in the steam/hot water boiler. The factory set value of “AL1” is 127.2 (both °C and °F).
  • Page 51 When the controller is reset, all parameter values will return to the JUMO manufacturer setting which means that you have to re-enter all Speedster settings by hand, also the settings in the sub-menu that can be entered when the display shows “dF”.

  • Page 52: Exchanging Jets For Different Infusion

    TECHNICAL MANUAL Exchanging jets for different infusion The Speedster coffee water system contains 2 restrictors (or jets): one inside the group head (see figure 15), the other in the tube that leads from the heat exchanger to the coffee boiler (see figure 32). Standard, a jet with 0.6 mm diameter is mounted in the group head and a 1.5 mm jet is mounted in the tube, the only function of the latter is to...

  • Page 53: Parts Included In Standard Shipment

    Water softener, 6 l (with PVC hose for regeneration)  Aluminium tamp-support  Stainless steel tamper  Blind filter  Jar with cleaning powder  Group brush  Extra group screen  Extra rubber group seal  Drain hose  Speedster T-shirt Speedster page 52...

  • Page 54: Contact Information

    INFORMATION Contact information Kees van der Westen ~ Espressonistic Works B.V. Van Elderenlaan 6 5581WJ WAALRE The Netherlands Telephone +31 40 2223433 Email info@keesvanderwesten.com Website www.keesvanderwesten.com Ordering replacement parts Check our website if the webshop is already up and running.

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