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Mira Zest 7.5 User Manual

Mira Zest 7.5
32 pages
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1
Maintenance Guide
Operation &B
Installation
ELECTRIC SHOWERS
THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER
7.5 and 8.5 kW
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Mira Zest 7.5 Specifications

General IconGeneral
Maximum Static Pressure10 Bar
TypeElectric Shower
MaterialPlastic
Warranty2 Years
Inlet Connection15mm
FinishWhite

Summary

Introduction to Mira Zest

Important Safety Information

Mandatory Earthing

Appliance must be earthed as per electrical regulations.

Operating Restrictions

Instructions on operating the appliance when frozen or leaking.

User Serviceable Components Warning

States no user serviceable parts are located under the appliance cover.

User Cautions and Compliance

Instruction Retention and Handover

Advise users to read and keep the guide for future reference.

Regulatory Compliance

Electrical and plumbing installations must comply with UK regulations.

Electricity Supply Adequacy Check

Essential to contact the electricity supply company for adequacy.

Pack Contents Checklist

Mira Zest Shower Unit

Lists the main shower unit and associated parts included in the package.

Included Documentation

Lists the user guides and brochures provided with the product.

Dimensions

Wiring Diagram

Technical Specifications

Plumbing Specifications

Details minimum and maximum inlet pressures and static pressure requirements.

Electrical Specifications

Specifies fuse requirements and terminal block cable size limits.

Installation Requirements

Plumbing Requirements Overview

Details water pressure, connection types, and pipework preparation.

Freezing Conditions Avoidance

Warning against installing the unit where it might freeze.

Pipework Preparation & Flushing

Emphasizes flushing pipework before connecting the appliance.

Installation Requirements

Hard Water Area Advice

Advice on water treatment devices for hard water areas.

Hose Retaining Ring & Check Valve

Explains the use of hose retaining rings and optional check valves.

Plumbing Test Procedure

Suggests testing plumbing connections before electrical hookup.

Electrical Installation

Supply Rating & Voltage Drop

Adequate supply rating and potential voltage drop effects.

Earthing & Bonding Requirements

Instructions on earthing the appliance and supplementary bonding.

RCD & Double-Pole Switch Usage

Requirement for a 30mA RCD and a double-pole switch for supply.

Plumbing and Electrical Schematic Diagram

Installation Procedure

Appliance Positioning & Clearance

Specifies minimum distances and gaps for appliance and handset placement.

Case Preparation & Cover Removal

Steps to remove the appliance cover and service tunnel.

Water Supply Connection

Instructions for connecting the mains-fed cold water supply pipe.

Installation Procedure

Electrical Connections

Bringing electrical cable into the case and connecting conductors.

Terminal Block & Earth Bonding

Re-tightening terminal block screws and fitting earth bonding clamp.

Wall Mounting & Case Clearance

Warning not to tile up to the case; must be fitted to a flat surface.

Commissioning the Shower

Initial Power & Water Checks

Ensure TOP knob is STOP and electrical supply is isolated.

Power Setting Verification

Verify water flow at LOW, MEDIUM, and HIGH power settings.

Temperature & Flow Adjustment

Setting shower temperature using the BOTTOM knob.

Shower Operation Guide

Shower Heating Principle

Explains the basic principle of heating water via elements.

Temperature Control Mechanism

How the temperature control knob affects water flow and temperature.

Minimum Pressure & Thermal Switch

Requirement for minimum pressure and thermal switch function.

Shower Operation Guide

Spray Plate Maintenance

Importance of keeping spray plate holes clear for performance.

Starting and Adjusting Shower

Steps to switch on, set to HIGH power, and adjust temperature.

Turning Off & Supply Isolation

Steps to turn off the shower and main electrical supply.

Maintenance Procedures

General Maintenance Warning

Emphasizes professional maintenance for any required work.

Flow Valve & Switching Assembly Removal

Detailed steps for removing the flow valve and switching assembly.

Flow Valve & Switching Assembly Installation

Steps for refitting the flow valve and switching assembly.

Heater Tank Service

Heater Tank Removal Steps

Instructions for disassembling the heater tank.

Thermal Switch Handling Caution

Warning not to press the printed disc on the thermal switch.

Heater Tank Installation Steps

Refitting the heater tank and ensuring correct wire positions.

Thermal Switch Service

Thermal Switch Removal

Instructions for removing the thermal switch.

Component Refitting

Refitting components in reverse order with correct wiring.

Inlet Filter Replacement

Fault Diagnosis Guide

Low Water Flow Issues

Troubleshooting for low water flow issues.

No Hot Water Production

Diagnosing why the appliance isn't producing hot water.

Temperature Cycling Problems

Identifying causes for temperature cycling.

Fault Diagnosis Guide

Flow Reduction & Pressure Issues

Addressing low flow from other outlets or low water pressure.

Cool Shower & Temp Knob Issues

Troubleshooting cool showers in summer or ineffective temp knob.

Flow After Electrical Isolation

Explaining why water might still flow when electrical supply is off.

Spare Parts List

Mira Zest Part Numbers

A list of available spare parts with corresponding part numbers.

Connector Assembly Notes

Important notes on assembling push-fit connectors for micro-switches.

Optional Accessories

DCV-H Check Valve

Description and function of the DCV-H outlet double check valve.

Notes

Customer Service & Support

Product Guarantee Details

Details on the product guarantee and its terms.

After Sales Service Options

Information on how to get assistance and expert advice.

Customer Care & Contact Info

Guidance on product issues and contact details for support.

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