Kohler Mira Zest 7.5 Installation And User Manual Download Page 2

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Contents

Introduction .......................................................................................................... 3

Important Safety Information ............................................................................. 4

Pack Contents Checklist ...................................................................................... 7

Specifications ...................................................................................................... 8

Dimensions .......................................................................................................

Wiring Diagram ..................................................................................................

Installation Requirements ................................................................................. 11

Installation ......................................................................................................... 16

Commissioning .................................................................................................. 21

Operation ........................................................................................................... 22

Fault Diagnosis .................................................................................................. 25

Customer Fault Diagnosis ...............................................................................

Installer Fault Diagnosis ..................................................................................

Maintenance ...................................................................................................... 30

Cleaning the Inlet Filter ...................................................................................

Relief Valve Assembly and Resetting ..............................................................

Flow Regulator Assembly/Switch Assembly Removal & Installation ...............

Heater Tank-Removal and Installation .............................................................

Thermal Trip-Removal and Installation .............................................................

Spare Parts ........................................................................................................ 40

Guarantee, Customer Care policy, and How to contact us ............................ 44

Summary of Contents for Mira Zest 7.5

Page 1: ...1 THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER ELECTRICSHOWER Installation User Guide...

Page 2: ...21 Operation 22 Fault Diagnosis 25 Customer Fault Diagnosis 25 Installer Fault Diagnosis 27 Maintenance 30 Cleaning the Inlet Filter 30 Relief Valve Assembly and Resetting 32 Flow Regulator Assembly S...

Page 3: ...an result from taps being turned on or off or toilets being flushed Products covered by this guide Mira Zest 7 5 An 7 5 kW 240 V AC 6 9 kW 230 V AC heater Available in a white finish Mira Zest 8 5 An...

Page 4: ...hetank body Only Mira Showers recommended outlet fittings should be used 8 If water leaks from the pressure relief valve maintenance will be required before the appliance can be safely used 9 Thereare...

Page 5: ...that the electricity supply is adequate for the purpose 6 The plumbing installation must comply with the requirements of UK Water Regulations Bye laws Scotland Building Regulations or any particular r...

Page 6: ...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...

Page 7: ...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...

Page 8: ...8 Specifications Dimensions 205mm 103mm 53mm 310mm...

Page 9: ...9 WiringDiagram...

Page 10: ...the relevant directives for CE marking FlowRateGraph 1 These curves are for the specified outputs at 240 V 2 Allapplianceheatingelementshaveamanufacturingtolerance Flowratesmay be above or below those...

Page 11: ...tioned so that it discharges down the centre line of the bath or across theopeningofashowercubicle andmustbedirectedawayfromtheappliance 4 The appliance is fitted with an inlet connector assembly that...

Page 12: ...age to the case when soldered fittings are used pre solder the pipework and fittings before connecting them to the inlet stub 12 Supply pipework MUST be flushed to clear debris before connecting the a...

Page 13: ...there will be occasions when the hose retaining ring will not provide a suitable solution In these instances an outlet double checkvalve must be fitted This will increase the required supply pressure...

Page 14: ...bondedtoearthusing a minimum cable size of 4 0 mm2 if the cable is not mechanically protected 2 5 mm2 if mechanically protected 3 Theminimumcablesize cross sectionalarea requiredis6mm2 undernormal ins...

Page 15: ...ling 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 live and neutral conductors as this will prevent them f...

Page 16: ...t drill into cables or pipes in the wall 4 Thoroughly flush the supply pipe 5 On the shower turn both knobs to the full anti clockwise position Decide on a suitable position for the appliance minimum...

Page 17: ...ng or falling supply 9 Rotatetheinletconnectortosuitthe direction of the incoming water supply Inlet Connector 10 The case has thinned sections that canberemovedtoallowentryofthe supply pipe and elect...

Page 18: ...ly flush the mains fed cold water supply pipe The supply must be clean and free fromdebrisBEFOREconnecting the appliance 16 Replacetheshoweronthewalland securethroughthethreefixingholes using the supp...

Page 19: ...tthebarewiresintotheclamps L Live Brown wire T Earth Green sleeved wire N Neutral Blue wire Note Donottwistthecoresofthewiresorstrainthecablestomakethemreach the terminal block 22 Connect the conducto...

Page 20: ...obs 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 bondingcompli...

Page 21: ...e TOP knob to the MEDIUM position The temperature of the water should rise slightly Allow a few seconds for the warm water to reach the handset this shows that the MEDIUM power setting is operating co...

Page 22: ...of the incoming cold water supply and or fluctuations in mains electrical voltage will effect the temperature of the water Adjust the temperature knob as necessary to compensate 5 The shower requires...

Page 23: ...nob to Medium This setting will provide sufficient power when the supply water temperature is warmer such as in the summer For an unheated shower set the power knob to Low To set the shower temperatur...

Page 24: ...4 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...

Page 25: ...he watertemperature The water continues to flow when the double pole switch is turned off The incoming water is warmer in the summer so the shower power setting is too high The handset sprayplate is b...

Page 26: ...ce isolating valve is closed The power is off at the double pole switch Open the stop isolating valve completely Clear the blockage or replace the hose or handset Switch on the power at the double pol...

Page 27: ...internal wiring connection has failed One of the heater tank elements has failed Switch assembly diaphragmfault water dripping from the unit Check the integrity of the internalwiring Replace the heate...

Page 28: ...MCB RCDhasbeen tripped indicating a possible electrical fault for example heater tank elementfailure Regularly clean the handset sprayplate Refer to the Maintenance section of the handsetmanual Renew...

Page 29: ...valve operates a small rubber ball is ejected Reset the relief valve assembly refer to Maintenance Relief Valve Setting The water can not be turned off Replace the flow regulatorassembly The pilot va...

Page 30: ...vided Before replacing any parts ensure that the underlying cause of the malfunction has been resolved WARNING There are no user serviceable components beneath the cover of the appliance Only a compet...

Page 31: ...rer sinstructions 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 assembly...

Page 32: ...the appliance is frozen 2 Remove the five screws that hold the switch assembly heater tank and flow regulator assembly 3 Lift out the switch assembly heater tank and flow regulator assembly 4 Using yo...

Page 33: ...nnection to the inlet connector 3 Remove the six screws that hold the switch assembly heater tank flow regulator assembly and inlet connector Flow Regulator Assembly Switch Assembly Removal and Instal...

Page 34: ...e 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 w...

Page 35: ...ed in the correct positions 7 Carefully pull the flow regulator assembly switch assembly and the heater tank away from the case Carefully separate the flow regulator from the switch assembly and inlet...

Page 36: ...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 inlet supply pipe 3 Remove the s...

Page 37: ...f the switch 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 Carefully pull off...

Page 38: ...holds the green earth wire to the thermal trip 13 Refit the components in reverse order Make sure that the electrical wires and O seals are installed in the correct positions Flow Regulator Assembly S...

Page 39: ...5 Remove the screws that hold the red and three brown wires on the thermal trip 6 Remove the thermal trip Caution Do not press printed disc on the thermal trip as this will make the component unservic...

Page 40: ...g Assembly 7 5 8 5 kW 439 79 Switch Assembly Rotary 439 81 Cover Assembly Zest 439 87 Terminal Block Assembly 439 88 Seal Pack components identified B 439 89 Screw Pack components identified C 439 90...

Page 41: ...41 SparePartsDiagram 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...

Page 42: ...42 Notes...

Page 43: ...43 Notes...

Page 44: ...tertheperformanceofyourshowerdeclines consultthis manual toseewhethersimplehomemaintenanceisrequired Please call our Customer Services to talk the difficulty through request service under guarantee if...

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