- Cold mains supply
- One year guarantee
- Water efficient product
- Separate controls for start / stop and power and flow / temperature selection
- Shower will cut out if temperature becomes too hot
- Complete with Mira Response fittings with adjustable showerhead, limescale resistant and simple to clean
- One handed height adjustment of the clamp bracket for ease of use
- Compact design
Product Range – Mira Zest 7.5kW
240V AC 8.5kW (230V AC 7.8kW) heater with a Mira Response adjustable spray showerhead with three spray patterns: Start, Soothe and Force. Supplied complete with hose, clamp bracket, soap dish, slide bar and hose retaining ring / gel hook.
Mira Zest 8.5kW – 240V AC 8.5kW (230V AC 7.8kW) heater with a Mira Response adjustable spray showerhead with three spray patterns: Start, Soothe and Force. Supplied complete with hose, clamp bracket, soap dish, slide bar and host retaining ring / gel hook.
Limitations of Use
- 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.
Water flow is started or stopped by depressing the start / stop button
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.
Power selection 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 withing a 6oC band, provided that the minimum required pressure is maintained.
The design of 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 Zest Thermostatic, Escape, Advance ATL, Azora and Galena.
The temperature of incoming water will vary between summer and winter and therefore, the temperature control knob will need to be marginally 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.
When the shower is first turned on or a different temperature is selected there will be a slight delay before the shower temperature changes, to allow the previously heated water to be used up.
- Minimum maintained pressure : 0.7 bar
- Minimum static pressure : 0.2 bar (to keep Solenoid valve closed)
- Maximum static pressure : 10 bar
Optional DCV-H: outlet double check valve providing an alternative method of complying with UK water regulations
Guaranteed for one year from date of purchase against faulty materials or workmanship. Optional extended warranty available. Contact Mira Customer Support.
The Mira Zest is suitable for installation as part of the following plumbing systems:
- Mains cold water pressure
Installation – Plumbing
Inlet connection : 15mm plastic swivel stub for use with a push fit or compression fitting (not supplied) from the top, bottom or back.
Outlet connection : 1/2″ BSP male
The plumbing installation must comply with the requirements of UK water Regulations / Bylaws (Scotland), Building Regulations / Bylaws (Scotland) Building Regulations or any particular regulations and practices, specified by the local water company or water undertakers. The installation should be carried out by a plumber or a contractor who is registered or is a member of an association
Protect the product from damage whilst making soldered connections. Some fluxes cause damage to plastic components
Installation – Electrical
The appliance must be earthed
This appliance is intended to be permanently connected to the fixed electrical wiring of the mains system, in accordance with the current edition of ‘The Plugs and Sockets etc. (Safety) regulations’ in force at the time of the installation.
The Mira Zest 7.5kW requires a 32 Amp MCB as it draws 31.25 Amps. The Mira Zest 8.5kW requires a 40 Amp fuse.
The terminal block will not accept cable larger than 10mm2
Maximum ambient air temperature for the appliance whilst in use is 30oC
The appliance will provide satisfactory performance with an incoming electrical supply voltage of 230V ±10%. The supply voltage will affect the flow rate.
The installation must comply with ‘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 or a wall mounted switch in the appropriate zone (see Wiring regulations)
We recommend the inclusion of a 30mA residual current device (RCD). This may be a requirement of Wiring Regulations.
Click to view our full range of Mira Zest available to buy on-line.