Kohler Electric Shower manual

1 THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER ELECTRIC SHOWER Installation & User Guide[...]

2 Content s Introduction .......................................................................................................... 3 Important Safety Information ............................................................................. 4 Pack Contents Checklist ...................................................................................[...]

3 Introduction Thank you for purchasing a quality Mira Zest Shower. To enjoy the full potential of your new shower, please take time to read this guide thoroughly, and keep it handy for future reference. Mira Zest electric showers have separate controls for power selection and for temperature/flow adjustment. A unique flow regulator stabilises any [...]

4 Import ant Safety Information WARNING! 1. Products manufactured by us are safe and risk-free, provided that they are installed, used and maintained in good working order, in accordance with our instructions and recommendations. 2. THIS APPLIANCE MUST BE EARTHED. 3. In accordance with ‘The Plugs and Sockets etc. (Safety) Regulations’ in force [...]

5 CAUTION! 1. Read all of these instructions and retain this guide for later use. 2. Pass on this guide in the event of change of ownership of the installation site. 3. Follow all warnings, cautions and instructions contained in this guide, and on or inside the appliance. 4. The electrical installation must comply with the “Requirements for Elect[...]

6 9. When this appliance has reached the end of its serviceable life, it should be disposed of in a safe manner, in accordance with current local authority recycling, or waste disposal policy.[...]

7 Pack Contents Checklist  Tick the appropriate boxes to familiarise yourself with the part names and to confirm that the parts are included.  3 x Wall Plugs  3 x Fixing Screws  1 x Mira Zest Electric Shower Documentation  1 x Installation & User Guide  1 x Installation Template  1 x Guarantee Brochure[...]

8 Specifications Dimensions 205mm 103mm 53mm 310mm[...]

9 Wiring Diagram[...]

10 Plumbing 1. Minimum maintained inlet pressure for satisfactory operation: 0.7 bar 2. Maximum static inlet pressure: 10 bar 3. Minimum static pressure to keep the flow valve closed: 0.5 bar Electrical 1. The appliance requires a 40 Amp fuse. 2. The terminal block will not accept cable larger than 10 mm 2 . St andards and Approvals 1. This Mira Ze[...]

11 Inst allation Requirement s Plumbing 1. The Mira Zest 7.5 kW and 8.5 kW electric showers are designed to operate with a minimum maintained inlet pressure of 0.7 bar up to a maximum static inlet pressure of 10 bar . 2. The appliance is normally connected to the cold water mains-fed supply. However, the water supply can be taken from a cold water [...]

12 9. Do not install the appliance in a position where it may become frozen. The shower unit must not be fitted where it may be exposed to freezing conditions. The shower unit must not be used if you suspect it may be frozen. 10. We recommend that a non-restrictive (free-flowing) isolating valve is fitted in the cold water supply pipe to allow the [...]

13 15. A hose retaining ring is supplied to prevent the handset from dropping below the spillover level of the bath or shower, which could lead to contamination from back-siphonage. The supplied hose retaining ring should meet the majority of user requirements for shower installations with flexible outlet fittings. However, there will be occasions [...]

14 Electrical 1. In a domestic installation, the rating of the electricity supply company fuse and the consumer unit must be adequate for the additional demand. This is a high- power appliance, and it is essential to contact your electricity supply company to ensure that the supply is adequate for the appliance. Voltage drop due to local heavy dema[...]

15 6. A separate, permanently connected supply must be taken from the consumer unit to the appliance through a double-pole switch, which has a minimum 3 mm contact separation. The switch can be a ceiling mounted pull-cord type within the shower room, or a wall mounted switch in an adjacent room. 7. DO NOT twist the individual cable cores of the liv[...]

16 Inst allation WARNING! Isolate the electrical and water supplies before installing the shower. 1. 2. Put the installation template on the wall and mark the positions of the top two fixing holes. Ensure that there are sufficient lengths of supply pipe and electrical cable to reach the connection points as shown on the template. 3. Remove the inst[...]

17 8. Determine the direction of the incoming water supply: falling (entering the shower from the top), or rising (entering the shower from the bottom). Do not use an incoming supply entering the shower directly from the back. Add an elbow to the supply pipe and connect it as a rising or falling supply. 9. Rotate the inlet connector to suit the dir[...]

18 12. Secure the shower to the wall loosely through the top two fixing holes, using the supplied screws. 13. Mark the position of the bottom fixing hole. 14. Remove the shower from the wall. Drill the bottom fixing hole and insert the supplied wall plug. 15 . Thoroughly flush the mains-fed cold water supply pipe. The supply must be clean and free [...]

19 18. Bring the electrical cables into the case. 19. Strip back sufficient of the outer cable insulation to enable routing to terminal block. 20. Fit an earth sleeve to the earth wire. 21. Loosen the screws in the terminal block and insert the bare wires into the clamps. L (Live) = Brown wire T (Earth) = Green sleeved wire N (Neutral) = Blue wire [...]

20 24. Replace the service tunnel. 25. Replace the cover. If the cover does not fit easily, rotate the knobs slightly so that they fit onto the spindles. Do not force the cover. 26. Tighten the three cover screws. 23. If necessary, fit an earth bonding clamp to the supply pipe and ensure that the bonding complies with the relevant regulations in fo[...]

21 Commissioning If you are unsure how electric showers work, please read through the Operation section before continuing. 1. Make sure that the TOP control knob is in the 'STOP' position and that the electrical supply has been isolated. 2. T urn the BOTTOM control knob fully anticlockwise to the full cold position. 3. T ur n the w ater s[...]

22 Operation Advice to Users 1. Electric showers work by taking in cold water and passing it over the heating elements contained in the tank inside the shower. 2. The showering temperature is adjusted by turning the temperature control knob, which varies the flow of cold water across the elements. The slower the rate of flow, the warmer the water, [...]

23 Operation Instructions Note! Read the Important Safety Information section first. WARNING! The spray plate holes must be kept clear. The spray plate should be regularly removed and cleaned in descalent. Lack of regular spray plate cleaning will lead to poor performance and cause early failure of the appliance. See the shower fittings User Guide [...]

24 To turn the shower off 1. Turn the power knob to Stop . Note! A small amount of water may continue to flow from the handset for a few moments. 2. Switch off the electrical supply at the double pole switch.[...]

25 Fault Diagnosis Customer Fault Diagnosis The troubleshooting information below gives details on what you can do as a user if you encounter problems with the shower. If this information does not fix the problem, contact the installer for advice. Read the Important Safety Information section first and refer to the appliance diagram. WARNING! There[...]

26 Malfunction Cause Remedy No water or very low flow rate. No hot water from shower, with the knobs in any position. Other water outlets are being used during showering, causing the water pressure to drop below the minimum required. The water pressure is below the minimum required. Shower temperature cycles between hot and cold. The temperature is[...]

27 Installer Fault Diagnosis The troubleshooting information below gives details on solutions to problems with the shower, for installers. Before replacing any parts, ensure that the underlying cause of the malfunction has been resolved. Read the Important Safety Information section first and refer to the appliance diagram. Contact the local water [...]

28 Malfunction Cause Remedy No water or very low flow rate. The handset sprayplate is blocked. The incoming water supply stop valves, or the appliance isolating valve, is closed. The hose or handset is blocked. Insufficient water supply pressure. The heater tank is excessively scaled. The pilot valve is faulty. The inlet filter is blocked. The powe[...]

29 Malfunction C ause Remedy Water leaks from the bottom of the case near the outlet, and there is no flow from the handset. The pressure relief valve in the tank has been triggered, (the shower has a pressure relief valve assembly that works to reduce the damage if the outlet is blocked or the unit is frozen). Resolve the blocked outlet, and repla[...]

30 Cleaning the Inlet Filter WARNING! Isolate the electrical and water supplies before removing the cover. 1. Remove the three screws that hold the cover on the shower and remove the cover. 2. Remove the service tunnel from the shower. Maintenance Any maintenance must be carried out by a qualified tradesperson, following the instructions provided. [...]

31 4. Remove the inlet filter. 5. Clean the inlet filter with a stiff brush. If necessary, use a kettle descalent in accordance with the manufacturer's instructions. 6. Refit the components in reverse order. 3. Use a suitable spanner to remove the filter from the inlet connector assembly. Hold a wrench across the flats of the inlet connector a[...]

32 Relief V alve Assembly - Resetting WARNING! Isolate the electrical and water supplies before removing the cover. Mains electricity connections are exposed when the cover is removed. 1. Remov e the three screws that hold the cov er , remove the co ver . Note! The rubber ball is ejected to reduce the damage if the outlet is bloc ked or the applian[...]

33 WARNING! Isolate the electrical and water supplies before removing the cover. Mains electricity connections are exposed when the cover is removed. 1. Remove the three cover retaining screws, the cover and the service tunnel. 2. Remove the hose from the outlet connector and loosen the connection to the inlet connector . 3. Remov e the six screws [...]

34 6. Carefully pull off the blue wire and brown wire from the solenoid, fitted to the flow regulator . Note the position of the wires. 5. Carefully pull off the two brown wires attached to the microswitch. Note the position of the wires. Microswitch Solenoid[...]

35 8. Refit the components in re verse order . Make sure that the electrical wires and ‘O’ seals are installed in the correct positions. 7. Carefully pull the flow regulator assemb ly , s witch assembly and the heater tank away from the case. Carefully separate the flow regulator from the switch assembly and inlet connector by gently pulling ap[...]

36 Heater Tank - Removal and Installation WARNING! Isolate the electrical and water supplies before removing the cover. Mains electricity connections are exposed when the cover is removed. 1. Remove the three cover retaining screws, the cover and the service tunnel. 2. Remove the hose from the outlet connector and ease the inlet connector off the i[...]

37 4. Remove all wiring from the switch assembly . Note! Using long nose pliers, gently squeeze the lever lock on the top two spade connection, and pull them off the s witch assembly . Carefully pull the two lower connections off the switch assembly . 6. Ease off both thin brown wires attached to the microswitch. Note the position of the wires. 5. [...]

38 7. Lift out the flow regulator assembly , switch assembly and the heater tank from the case. 8. Carefully separate the flow regulator assembly from the s witch assembly , inlet connector and heater tank by gently pulling apar t. 9. Make a note of the positions of all the wiring on top of the heater tank. 10. Remove the screw that holds the green[...]

39 2. Make a note of the positions of the wiring on top of the heater tank. 3. Remov e the screw that holds the g reen ear th wire to the thermal tr ip . 4. Ease the thermal trip away from the heater tank. 7. Refit the components in re verse order . Make sure that the electr ical wires are installed in the correct positions. 5. Remove the screws th[...]

40 Spare P ar ts Spare Parts List 406.27 Filter 439.75 Inlet Connector Assembly 439.76 Clamp Bracket Pack (components identified ‘A’) 439.77 Flow Reg Assembly 7.5/8.5 kW 439.79 Switch Assembly, Rotary 439.81 Cover Assembly, Zest 439.87 T er m inal Block Assembly 439.88 Seal Pack (components identified ‘B’) 439.89 S crew Pack (components ide[...]

41 Spare Parts Diagram 439.87 439.95 439.81 439.90 439.99 439.91 439.92 A 439.79 439.77 A B B B B 406.27 439.75 C C C C[...]

42 Notes[...]

43 Notes[...]

44 P4340 (J96E) © Kohler Mira Limited, November 2003 Mira Showers Kohler Mira Ltd Cromwell Road, Cheltenham GL52 5EP. Mira is a registered trade mark. The company reserves the right to alter product specifications without notice. www.mirashowers.com Customer Service Mira Showers guarantee products against any defect of materials or workmanship for[...]