Mira GO 8.5 Installation, Operation, Maintenance Manual Download Page 24

24

1.  Advice to Users

Read the section 

“Important Safety Information”

 first.

1.1.

Electric showers work by taking in cold water and passing it over the heating
elements contained in the tank body of the shower.

1.2.

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 and vice versa. The holes in the spray plate of the
shower handset should always be kept clean to maintain a consistent flow and
stable shower temperatures.

1.3.

The Mira Go is designed to stabilise temperature changes caused by water
pressure fluctuations. These can result from taps being turned on or off or toilets
being flushed. Under such conditions average shower temperatures will be held
within a 6 °C band, provided that the minimum required pressure is maintained.

1.4.

Seasonal changes in the temperature of the incoming cold water supply and/or
fluctuations in mains electrical voltage, will require the 

'TEMPERATURE'

 knob

to be adjusted as necessary.

1.5.

The Mira Go requires a minimum maintained/running pressure of 0.7 bar to
operate. At pressures above 0.7 bar the Mira Go will minimise the temperature
fluctuations caused when other draw-off points are used. If the flow rate drops
below an acceptable value, the Mira Go will turn the heater elements off,
resulting in a cold shower.

1.6.

If the water temperature reaches an unsafe level, the thermal switch assembly
turns off the heater elements. As the water temperature falls the elements will
be turned on. The switch will cycle on/off/on if the flow rate is not increased and
the temperature of the shower reduced.

1.7.

Check the shower temperature before entering the shower. The previous user
may have selected a 

different

 temperature setting.

1.8.

When the shower is first turned on, or a different temperature is selected, there
will be a slight delay before the water temperature changes.

Section

11

Operation

Summary of Contents for GO 8.5

Page 1: ...1 Maintenance Guide Operation B Installation ELECTRIC SHOWERS THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER 8 5 kW Temperature Start Stop...

Page 2: ...nts Checklist 7 4 Dimensions 8 5 Wiring Diagram 9 6 Specifications 10 7 Installation Requirements 10 8 Installation 14 9 Commissioning 17 10 Maintenance 19 11 Operation 24 12 Fault Diagnosis 28 13 Not...

Page 3: ...thoroughly having done so keep it handy for future reference A range of electric showers having separate controls for power selection and temperature flowadjustment Auniqueflowregulatorstabilisestempe...

Page 4: ...the current edition of The Plugs and Sockets etc Safety Regulations in force at the time of installation this appliance is intended to be permanently connected to the fixed electrical wiring of the m...

Page 5: ...tion such as 2 5 This is a high power unit it is essential to contact your electricity supply company to ensure that the electricity supply is adequate for the purpose 2 6 The plumbing installation mu...

Page 6: ...ng Particularconsiderationshouldbe giventotheyoung theelderly theinfirm oranyoneinexperiencedinthecorrect operation of the controls 2 8 When this appliance has reached the end of its serviceable life...

Page 7: ...o confirm that the parts are included 2 Documentation 1 x Installation Operation and Maintenance Guide 1 x Installation Template 1 x Customer Support Brochure Section 3 Pack Contents Checklist 1 Mira...

Page 8: ...8 Section 4 Dimensions Temperature Start Stop 342 mm 203 5 mm 79 mm...

Page 9: ...Diagram Temperature Start Stop Electrical Schematic Diagram Isolating Valve Double pole Isolating Switch Mains fed Cold Water Supply Hose Retaining Ring Mira Go Clamp Bracket Shower Tray Tank Connecti...

Page 10: ...water mains fed supply However the water supply can be taken from a cold water storage cistern provided there is a minimum maintained inlet head of water of 7 metres the vertical distance from the ba...

Page 11: ...der the pipework and fittings before connecting them to the inlet connector assembly 1 10 TheMiraGoisfittedwitha BSPmaleoutletthread toacceptaMirashower hose 1 11 Supply pipework MUST be flushed to cl...

Page 12: ...Withinthebathroomorshowerroom allaccessible conductive parts of electrical equipment and extraneous conductive parts metal parts that are likely to introduce earth potential must be electrically bond...

Page 13: ...t of the consumer unit or a separate unit 2 6 A separate permanently connected electrical supply must be taken from the consumer unit to the Mira Go through a double pole switch which has at least 3 m...

Page 14: ...tom rising or back inlet 1 6 Swivel the inlet connector assembly to suit Remove the inlet blanking cap 1 7 Removeasappropriate thethinnedsectionsoftheMiraGocase toallowthe supplies to enter the produc...

Page 15: ...upply Pipe Bottom Entry Terminal Block Cover Retaining Screw Holes For Cover Retaining Screws The inlet connector assembly can be swivelled to suit the supply Do not fit the Mira Go to the wall and ti...

Page 16: ...nto the terminal block Make sure that the bare cores of each conductor are securely trapped within each conductor clamp L Redwire N Black wire E Yellow Greensleevedwire 1 16 Re tighten the terminal bl...

Page 17: ...case 1 4 Turn the TOP control knob to the low position 1 5 Switch on the electrical supply at the double pole isolation switch 1 6 PresstheSTARTbutton Checkthatwaterflowsfreely from the shower within...

Page 18: ...Turn the 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 oper...

Page 19: ...son should remove the cover 3 Flow Valve and Switch Assembly Removal and Installation WARNING Make sure that the electrical supply is turned off at the mains and the appropriate circuit fuse is remove...

Page 20: ...1 Remove the flow valve and switch assembly 3 12 Refit the components in reverse order Make sure that the electrical wires are installed in the correct positions Flow Valve and Switch Assembly Removal...

Page 21: ...esurethatyoueasetheinletconnectorassemblyofftheinletsupply pipe 4 7 Make a note of the positions of the wiring on top of the heater tank 4 8 Remove the blue wire and associated solenoid wires from the...

Page 22: ...allation Warning Make sure that the electrical supply is turned off at the mains and the appropriatecircuitfuseisremoved Mainselectricalconnectionsareexposedwhenthe cover is removed 5 1 Remove the thr...

Page 23: ...dingwiremust be reconnected above the thermal switch flange 6 Inlet Filter Replacement Warning Make sure that the electrical supply is turned off at the mains and the appropriate circuit fuse is remov...

Page 24: ...eratureoftheincomingcoldwatersupplyand or fluctuationsinmainselectricalvoltage willrequirethe TEMPERATURE knob to be adjusted as necessary 1 5 The Mira Go requires a minimum maintained running pressur...

Page 25: ...g water supply at 10 C and a showering temperature at 42 C the temperature rise is 32 C The flow rate is therefore 4 l min How Your Electric Shower Works The higherthetemperaturethelowertheflowratewil...

Page 26: ...l mounted switch 2 2 Press the START button 2 3 Rotate the TOP control knob to the high position Full Power 2 4 Wait 15 20 seconds for warm water to reach the handset 2 5 If necessary turn the BOTTOM...

Page 27: ...27 COLD Hotter Cooler High Medium Low Press to Start Stop Temperature Start Stop Shower Controls...

Page 28: ...ice Malfunction Cause Remedy No water or very low flow rate Handset sprayplate blocked Remove clean Refer to Maintenance in the I O M guide for the fittings Incoming water supply stop valves or applia...

Page 29: ...sureincomingwater supply stopcock and or appliance isolating valve turned fully on If fault still persists contact Unable to select a cool enough shower during summer months Due to the rise in water m...

Page 30: ...vided Beforereplacinganyparts 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 competent...

Page 31: ...e fails to producehotwater in any switch position Electrical supply isolated at double pole switch the pull cord Switch on Fuse blown orMCB RCD tripped indicating an electrical fault e g heater tank e...

Page 32: ...rts as necessary Contact local water authority undertaker Check water supply static pressure Note Static pressure may fall below 0 2 bar whenotherappliances areoperatede g dishwasher washing machine e...

Page 33: ...33 13 Notes Section...

Page 34: ...identified A 416 47 Inlet Connector Assembly 416 48 Latching Switch 416 51 SolenoidCoil 416 52 OutletConnector 417 49 Terminal Block Assembly 7 5 8 5kW 417 50 Flow Valve Assembly 417 51 Switching Asse...

Page 35: ...35 2 Mira Go Spare Parts Diagram 416 41 419 22 416 43 454 01 416 48 416 51 417 50 872 01 416 38 872 28 416 47 419 28 417 49 416 52 A A A B B B B B B 417 51...

Page 36: ...te BallygowanRoad Moneyreagh CoDown BT236BL For Customers in Republic of Ireland Modern Plant Ltd Telephone Dublin 01 4591344 Mon to Fri 9am to 5pm Fax Dublin 01 4592329 24 hours Post Otter House Naas...

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