Mira Electric Shower

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Mira Sport Max Electric Shower
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Mira Electric Showers

Mira Zest 7.5 and 8.5

Combining style with performance, the compact Mira Zest will fit neatly into even the smallest of shower areas. It is available in a choice of power ratings - 7.5kW or 8.5kW - with the higher rating producing a more forceful water flow.

Low medium and high power selection
Smooth and accurate temperature adjustment

Application
The Mira Zest is suitable for installation as part of the following plumbing systems:

Mains cold water pressure
(gravity fed supply - use Mira Elite)

Finish

White

	Separate power and flow/temperature controls for ease of use.
	Gradual, delayed turn off - safer showering for next user and low limescale build up.
	Shower will cut out if temperature becomes too hot.
	Complete with Mira Reflex fittings.Compact design

Mira Zest 7.5

240V AC 7.5Kw (230v ac 6.9Kw) heater with a Mira Reflex Single Spray handset. Supplied complete with hose, clamp bracket, soap dish, slide bar and hose retaining ring/gel hook.

Limitations of Use 7.5 and 8.5

	The appliance must not be used for applications where an outlet flow control forms part of the shower fitting.
	The appliance must not be used for applications where it may become submerged in water.
	A water treatment device is recommended in areas where the temporary hardness is above 200ppm.
	The product and its components are only suitable for normal water supplies and should be cleaned only with mild washing up detergent or soap solution.

These electric showers work by regulating the flow of water, minimum 0.7 bar (maintained) pressure, over the heating elements contained in the heater tank of the shower unit.

Start/stop/power selection is chosen by turning the top control knob.

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. Spray plates in shower handsets should always be kept clean to maintain a consistent flow and assist in temperature control.

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

The design of the most popular electric showers does not allow for thermostatic control of the showering temperature, and as such they are unable to react to changes in temperature caused by a change in mains voltage, or in the incoming water temperature. For thermostatically controlled electric showers, refer to Mira Advance.

The temperature of incoming water will vary between summer and winter, and therefore, the temperature control knob will need to be adjusted to take account of these seasonal conditions. The length of dead leg of the cold pipe or its proximity to hot pipes, may affect the showering temperature.

If the water temperature reaches an unsafe level, the thermal switch assembly turns off the 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 shower temperature reduced.

Plumbing

Surface mounted unit.

Inlet connection: 15mm plastic swivel stub for use with a compression fitting (not supplied), from the top, bottom or back.

Outlet connection: ½" BSP male.

Maximum ambient temperature for the appliance whilst in use is 30ºC

Electrical

The appliance must be earthed.

The appliance is intended for connection to fixed electrical wiring.

The appliance requires a 40 Amp supply fuse.

The terminal block will not accept cable larger than 10mm2

The appliance will provide satisfactory performance with an incoming electricity supply voltage of 230V 10%. The supply voltage will affect the flow rate.

The installation must comply with BS7671 'Requirements for Electrical Installations'. Commonly referred to as the IEE Wiring Regulations, or any particular regulations and practices, specified by the local electricity supply company.

A separate permanently connected supply must be taken from the consumer unit to the appliance, via a double-pole switch, with at least a 3mm contact separation. The switch can be a ceiling mounted pull-cord switch within the bathroom, or a wall mounted switch in an adjacent room.

We recommend the inclusion of a 30mA residual current device (RCD). This may be part of the consumer unit or a separate unit.

Maintenance

Maintenance should be carried out in accordance with the information published in the Installation, Operation & Maintenance Guide, supplied with each product. This guide should be retained by the user for future reference.

A conveniently situated isolating valve must be fitted in the supply pipework to allow complete maintenance of the product.

Approvals
Designed to comply with relevant harmonised European Standards.
Mira Zest is BEAB approved product.
Year 2000 compliant
Accessories
Optional DCV-H; outlet double check valve for high pressure applications, providing an alternative method of complying with Bye-law 17.

Guarantee

Guaranteed for one year from purchase against faulty materials or workmanship.

Optional extended warranty available. Contact Mira Customer Support.

Supporting information

Mira Zest Installation, Operation and Maintenance Guide P3270 is available prior to purchase. Contact Mira Customer Support.

Mira Zest 8.5

240V AC 8.5kW (230V AC 7.8kW) heater with a Mira Reflex Single Spray handset. Supplied complete with hose, clamp bracket, soap dish, slide bar and hose retaining ring/gel hook.