Mira Zest 7.5 Installation, Operation And Maintenance Manual Download Page 4

4

Section

Important Safety Information

WARNING!

1.1.

Products manufactured by us are safe and without risk provided they are installed,
used and maintained in good working order in accordance with our instructions and
recommendations.

1.2. THIS APPLIANCE MUST BE EARTHED.

In accordance with 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 mains system.

1.3. DO NOT

 twist the individual cable cores of the live and neutral conductors, as this

will prevent them from entering the terminal block.

1.4.

The shower unit must not be fitted where it may be exposed to freezing conditions.
Make sure that any pipework that could become frozen is properly insulated.

1.5. DO NOT

 operate this appliance if it is frozen. Allow the appliance to thaw before

using again.

1.6. DO  NOT

 operate this appliance if water leaks from the pressure relief valve,

maintenance will be required before the appliance can be safely used.

1.7. DO NOT 

fit any form of outlet flow control as the outlet acts as a vent for the tank

body. Only Mira recommended outlet fittings should be used.

1.8.

There are no user serviceable components beneath the cover of the appliance.
Only a competent tradesperson should remove the cover.

1.9.

If any of the following conditions occur, isolate the electricity and water supplies
and refer to 

“To contact us”

, on the back page of this guide.

1.9.1.

 If the cover is not correctly fitted and water has entered the appliance

         case.

1.9.2.

 If the case is damaged.

1.9.3. 

If the appliance begins to make an odd noise, smell or smoke.

1.9.4. 

If the appliance shows signs of a distinct change in performance, indicating

a need for maintenance.

1.9.5.

 If the appliance is frozen.

1.10. 

Isolate the electrical and water supply before removing the cover.

1.11.

 Mains connections are exposed when the cover is removed.

1.12. 

Refer to the wiring diagram before making any electrical connections.

1.13.

 Ensure all electrical connections are tight, to prevent overheating.

Summary of Contents for Zest 7.5

Page 1: ...1 Maintenance Guide Operation B Installation ELECTRIC SHOWERS THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER 7 5 and 8 5 kW...

Page 2: ...ts Checklist 6 Dimensions 7 Wiring Diagram 8 Specifications 8 Installation Requirements 9 Installation 13 Commissioning 15 Operation 17 Maintenance 21 Fault Diagnosis 26 Spare Parts 28 Accessories 30...

Page 3: ...eparatecontrolsforpowerselectionandtemperature flowadjustment Auniqueflowregulatorstabilisestemperaturechangescausedbywater pressure fluctuations These can result from taps being turned on or off or t...

Page 4: ...ter leaks from the pressure relief valve maintenance will be required before the appliance can be safely used 1 7 DO NOT fit any form of outlet flow control as the outlet acts as a vent for the tank b...

Page 5: ...ur electricity supply company to ensure that the electricity supply is adequate for the purpose 2 6 The plumbing installation must comply with the requirements of UK Water Regulations Bye laws Scotlan...

Page 6: ...art names and to confirm that the parts are included 2 Documentation 1 x Installation Operation and Maintenance Guide 1 x Customer Support Brochure Section Pack Contents Checklist 1 Mira Zest 7 5 or 8...

Page 7: ...7 Section Dimensions 202 mm 297 mm 81 mm...

Page 8: ...valve closed Electrical 1 The appliance requires a 40 Amp fuse 2 The terminal block will not accept cable larger than 10 mm2 Standards and Approvals 1 This Mira Zest complies with all the relevant di...

Page 9: ...5 Do not fit the appliance to the wall and tile up to the case The appliance must be fitted onto a finished flat and even wall surface This is important as difficulty may be encountered when fitting t...

Page 10: ...f user requirements for shower installations with flexible outlet fittings However there will be occasions when the hose retaining ring will not provide a suitable solution In these instances an outle...

Page 11: ...separate permanently connected supply must be taken from the consumer unit to the appliance through a double pole switch which has at least 3 mm contact separation The switch can be a ceiling mounted...

Page 12: ...12 Plumbing and Electrical Schematic Diagram...

Page 13: ...ains fed cold water supply pipe The supply must be clean and free from debris BEFORE connecting the appliance 8 Offer the appliance up to the wall and make sure that sufficient electrical supply cable...

Page 14: ...inlet connector can be swivelled to suit the supply Cold Water Supply Pipe Service Tunnel Installation of the Mira Zest Outlet Connector Fixing Screw Cover Retaining Screw Terminal Block Electrical Su...

Page 15: ...ise to full cold position 7 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 M...

Page 16: ...16 High Position Medium Position Low Position Stop Position Full Cold Position Select Shower Temperature By Rotating Clockwise As Necessary...

Page 17: ...of the incoming cold water supply and or fluctuations in mains electrical voltage will require the TEMPERATURE knob to be adjusted as necessary 5 The appliance requires a minimum maintained running p...

Page 18: ...g with an incoming 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 a These curves are for the specified outputs at 240V b Allap...

Page 19: ...ol knob operates through approximately of a turn from cold to hot Clockwise rotation will give warmer water with less flow Anticlockwise rotation will give cooler water with more flow Note Should the...

Page 20: ...20...

Page 21: ...osen the connection to the inlet connector 3 Remove the screw that holds the terminal block in position This will give you sufficient room to carry out the procedure without disconnecting any mains el...

Page 22: ...ation Electrical Supply Cable Terminal Block Cover Retaining Screw Inlet Supply Pipe Inlet Connector Flow Valve Assembly Clamp Bracket Heater Tank Microswitch Clamp Bracket Retaining Screws Heater Tan...

Page 23: ...lve and switching assembly and the heater tank in position 7 Carefully pull the flow valve switching assembly and heater tank away from the case Make sure that you ease the inlet connector off the inl...

Page 24: ...nals of the tankthe terminal block may be loosened by removing the fixing screw 4 Remove the splash guard which is located between the heater tank and the switching assembly 5 Remove the screws that h...

Page 25: ...ake sure that the electrical wires are installed in the correct positions Inlet Filter Replacement WARNING Isolate the electrical and water supplies before removing the cover Mains electricity connect...

Page 26: ...ngs Incoming water supply stop valves or appliance isolating valve turned down or off Turn stop isolating valve to the fully on position Hose or Handset blocked Clear blockage or renew Appliance fails...

Page 27: ...installer Unable to select a cool enough shower during summer months Due to the rise in water mains supply temperature the power rating may be too high Turn the TOP knob to the MEDIUM position and re...

Page 28: ...41658 CaseandTunnel 41663 ServiceTunnel 41665 Component Pack components identified B 41746 Microswitch N O 2 pin 41747 Flow Valve Assembly with actuator 41748 Switching Assembly with actuator 41749 T...

Page 29: ...29 2 Mira Zest Spare Parts Diagram 416 58 B B 416 63 416 47 416 38 416 15 417 47 41746 872 78 416 36 416 37 416 43 417 49 416 41 B A A A A A 416 42 A 417 48...

Page 30: ...ackfloworbacksiphonage ofpotentiallycontaminatedwater throughshowercontrolswhicharefittedwithaflexible hose as part of the outlet shower fitting The inclusion of the Mira DCV H will increase the requi...

Page 31: ...31 Notes...

Page 32: ...344 Monday to Friday 9am 5pm By Fax Dublin 01 4592329 24 Hours By Post Modern Plant Ltd Otter House Naas Road Clondalkin Dublin 22 Eire Guarantee Caradon Plumbing Solutions guarantee this product agai...

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