Mira Essentials Power Installation & User Guide

Brand: Mira

Model: Essentials Power

Type: Installation & User Guide

INSTRUCTION MANUAL

POWER SHOWER

THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER

Manual

back

Contents

Page

Introduction ................................................................... 3

Important Safety Information ................................................... 3

Pack Contents Checklist .......................................................... 4

Dimensions ................................................................... 5

Specifications ............................................................................ 6

Installation Requirements ........................................................ 8

Installation ................................................................... 8

Commissioning ....................................................................... 15

Operation ................................................................................. 18

Fault Diagnosis ....................................................................... 19

Maintenance ............................................................................ 21

Spare Parts .............................................................................. 22

Guarantee, Customer Care Policy, and How to contact us

.............................................................................. Back cover

Introduction

Description

The Manual Power Shower is an all-in-one power shower with an

integral mains voltage pump, with separate controls for flow and

temperature. It features a 15mm dual entry push-fit manifold to enable

the appliance to support various inlet supply configurations. The

manifold includes inlet filters and check valves.

Designed to be surface mounted the Manual Power Shower comes

complete with an adjustable spray handset with three settings, flexible

hose, adjustable slider, sliding rail and brackets.

WARNING!

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

Essentials Thermostatic Power Shower is intended to be

permanently connected to the fixed electrical wiring of the mains

system.

The shower unit must not be connected to a Mains Cold water

supply, Unvented High Pressure systems or Multi-Point/Combination

Gas Water Heaters.

This shower unit does not incorporate any form of thermostatic

control. If there is a cold water failure, the unit will deliver the water

temperature set on the hot water system.

This product is precision engineered and should give continued safe

and controlled performance, provided it is installed, commissioned,

operated and maintained in accordance with manufacturers

recommendations.

Check the contents of the box are included before installation.

Manual Power Shower

Pack Contents

Dimensions

General

Shower unit duty cycle: 15 minutes on, 60 minutes off.

Exceeding the units duty cycle

The motor is fitted with a thermal cut out device, if temperatures

become too high the device will cut the power to the motor but will

self-reset once temperatures have normalised.

Noise Level

The acoustic noise from the pump motor has been reduced with

integral foam/rubber mountings. The type of wall can affect noise

levels. Solid walls will provide quieter operation. At full flow this unit will

produce in the region of 55 dBA measured from a distance of 1m.

Running in period

For storage reasons the pump motor has a protective film on the

motor contacts. This may produce a burning smell for a period of up to

5 days after installation, this is normal.

Electrical

Power supply

220-240V at 50Hz, fused at 3 Amps, via a double pole fused switch

(not supplied) with a minimum 3mm contact separation in each

contact.

Power Consumption

150 Watts maximum.

Plumbing Connections

Inlet 2 x 15mm Push-fit manifold.

Outlet 1/2” BSP male.

Specifications

Operating Parameters

Ambient water temperature

Maximum temperature 30°C

Hot water temperature

Maximum inlet temperature 80°C

BS 6700 recommends hot water storage temperature should not

exceed 65°C.

Hot water should be set in the range of 60 to 65°C to meet

requirements of the shower unit.

Operating pressure

Minimum maintained pressure 0.0075 bar or 75mm head of water.

Maximum maintained pressure 0.5 bar.

Maximum static pressure 1bar or 10m head of water.

Maximum pressure loss ratio 10:1.

Standards

The Essentials Manual Power Shower has been designed to comply

with the requirements of UK Water Regulations/Bye-laws (Scotland).

The Essentials Manual Power Shower complies with all the relevant

EC directives.

Gravity Fed system - The shower MUST be fed from a cold water

cistern and hot water cylinder providing nominally equal pressure.

Installation Requirements

Installation

General

1. Do not install in a position where the unit can become frozen.

2. The shower unit must be supplied from a cold storage tank and

hot water cylinder with equal pressures. The shower unit must

not be connected to a Mains Cold water supply, Unvented High

Pressure systems or Multi-Point/Combination Gas Water Heaters.

2. This shower unit must be earthed.

3. Power supply cable should be 1mm² x 3 core flex.

4. Power supply must be 220-240 V at 50 Hz. The Isolating switch

must be double pole switched 3 Amp fused with at least 3mm

contact separation gap to each pole.

5. Do not turn electrical supply on until all plumbing connections

have been madeand the shower unit has been commissioned as

it must not be operated dry.

6. A 30mA RCD (residual current device) is recommended. This may

be part of the consumer unit or a separate unit.

3. Ensure that HOT (H) and COLD (C) supplies are connected to the

correct inlets. These are clearly marked. Failure to do so could be

dangerous.

4. The shower unit is for surface mounting only and must not be

recessed into any wall or cavity, or tiled up to, as this will inhibit

water drainage from rear of unit.

Electrical

1. The electrical installation must comply with the “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 in force at the

time of installation. The installation should be carried out by an

electrician or contractor who is registered, or is a member of, an

association such as:

National Inspection Council for Electrical Installation and Contracting (NICEIC),

throughout the UK, Tel: 0171 582 7746.

The Electrical Contractors Association (ECA), England and Wales,

Tel: 0171 229 1266.

The Electrical Contractors Association of Scotland (ECAS),

Tel: 0131 445 5577.

2. A minimum storage capacity of cold water of 230 litres (50

gallons) as the shower unit can deliver up to 13.5 litres/minute.

3. High level hot feed pipe routed upward to the same level as the

cold tank e.g. into loft space, should be avoided as air locks may

result.

4. Do not turn electrical supply on until all plumbing connections

have been made and the shower unit has been commissioned as

it must not be operated dry.

5. Do not solder supply pipework within 300mm of the shower unit

as heat transfer may damage plastic components.

6. Do not use compounds on the shower unit joints, they may cause

damage to the mechanism inside.

7. Do not insert fingers into the Push Fit connections.

8. The supply pipe ends must be free from burrs, which will

damage the Push fit seals.

9. If plated tubing is used for inlet pipework remove 25mm of plating

to ensure good seal.

Scottish and Northern Ireland Plumbing Employers’ Federation (SNIPEF),

Scotland and Northern Ireland, Tel: 0131 225 2255.

Plumbing

1. The plumbing installation must comply with the requirements of

UK Water 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 contractor who is registered, or is a

member of, an association such as:

Institute of Plumbing (IOP), throughout the UK, Tel: 01708 472791.

National Association of Plumbing, Heating and Mechanical Services Contractors

(NAPH & MSC), England and Wales, Tel: 01203 470626.

Manual Power Shower

Warning! Do not fix the shower

unit to the wall until plumbing and

electrical installations have been

completed.

1. Pull off control knob, and lift

off temperature control to

reveal cover securing screw.

2. Unscrew cover securing

screw and lift cover from

bottom to remove.

3. Locate base unit onto inlet

supplies against the wall, in

the chosen position. Ensure

that minimum head pressure

measurement is achieved

and the screwed outlet is at

the bottom.

4. Mark through fixing holes,

two at the top and one at the

bottom.

10. 15mm polythene plastic pipe suitable for hot water may be used

to supply the shower unit, but internal pipe supports must be

used.

11. Supplies must be thoroughly flushed to remove any debris before

connecting the shower unit.

12. Fit servicing valves in an accessible position.

5. Using the push-fit release/lock

tool, place twin bladed side on

the face of the connectors and

push grey collars into manifold

to release from supply pipes.

6. Drill wall and insert wall plug.

The wall plugs supplied may

not be suitable for the type of

wall being fixed to. Ensure

correct type of wall plugs are

used.

7. Cut away and trim the thinned

section at the top or bottom of

the case to allow electrical

supply cables to run down rear

of case.

8. Route the mains electrical

cable through the channel and

cable entry in the rear of the

base unit.

Caution! Ensure inlet pipework is

thoroughly flushed.

9. Locate base unit onto inlet

supplies and push onto

pipework.

10. Secure base unit to wall using

fixing screws supplied.

11. Lock push-fit collars using the

push-fit release/lock tool

using the single end to lift the

grey locking collars.

12. Insert 2 Blanking Plugs into

unused inlets by pushing in

firmly and lock using tool.

13. Before making any electrical

connection turn on water

supplies and check supply

connections for leaks.

14. Feed mains cable through

cable clamp and connect

electrical supply to marked

terminals in the following

manner:

L - Live terminal block

N - Neutral terminal block

E - Earth stud screw

15. Ensure that all terminal

connections are tight and that

no insulation is pinched.

16. Secure the cable clamp to

prevent strain on the terminal

block.

Warning!

Do not switch on the electrical

supply until the

COMMISSIONING has been

completed and the cover securely

fitted.

17. Fit blanking plate(s) into

unused inlet(s) of case.

Warning! Blanks should be fitted

to stop access to inside of unit.

18. Refit cover by locating onto

ridge on top of cover and

push the bottom of cover

against rear case. Refit cover

retaining screw.

19. Refit outer temperature

control lever and inner flow

control, ensuring keyway on

spindle is correctly engaged.

Priming the Unit

The unit must not be run dry.

Before proceeding any further

with the installation it is important

to prime the pump assembly

before switching on the electrical

supply.

1. Connect the flexible hose

only to the shower outlet of

the unit.

Caution! Do not over tighten.

2. Turn on the water supplies.

3. Turn the inner flow control

fully on.

4. Rotate the outer temperature

control anticlockwise to check

the hot supply and clockwise

to check the cold supply.

5. The pump is now primed.

6. Switch on the electrical

supply.

Commissioning

Inner

Flow

Control

Outer

Temperature

Control

Cooler

Warmer

Maximum Temperature Setting

It will be necessary to adjust the maximum temperature for site

conditions to ensure safe showering from the unit. Ensure hot water

temperature is at least 10°C above the required temperature from the

unit.

To reset the maximum outlet temperature the sequence below should

be followed:-

1. Turn inner flow control

anticlockwise to full on.

2. Turn the outer temperature

control lever anticlockwise

until maximum rotation has

been achieved.

3. Check temperature.

4. If water too hot:

a) Turn outer temperature

control lever clockwise to

desired temperature.

Inner

Flow

Control

If water too cold:

a) Remove the two controls

by gently pulling each

away from cover.

b) Refit outer temperature

control with the number 5

inline with the cover mark.

c) Refit inner flow control

ensuring spindle keyway

is correctly engaged.

d) Turn outer temperature

control anticlockwise until

desired temperature is

reached.

If water is not hot enough,

repeat procedure.

5. Turn inner flow control off and

remove both control knobs.

6. Refit outer temperature

control lever in 3 o’clock

position and refit inner flow

control.

Manual Power Shower

IMPORTANT!

For safety reasons this appliance is

fitted with an adjustable maximum

temperature setting. This must be

checked and adjusted as

necessary to suit both site

conditions and user’s comfort.

1. Turn the inner flow control

knob until the desired flow of

water is obtained. The flow of

water will increase the further

the control is turned, up to a

maximum 3/4 of a turn.

2. Turn the outer temperature

control lever in the direction of

the red indicator for warmer

water (anticlockwise) and in

the direction of the blue

indicator for cooler water

(clockwise), the numbers

indicate the relative

temperature:

1 = cold

3 = tepid

5 = Hot

Operation

Inner

Flow

Control

Outer

Temperature

Control

Cooler

Warmer

Remedy

Reset maximum

temperature.

Adjust cylinder

temperature

(Recommended not to

exceed 6O°C BS6700).

Reset maximum

temperature.

Clean spray plate.

Contact your installer.

Open valve.

Contact your installer.

Open valves.

Contact your installer.

The appliance is not

suitable for negative

head installations.

Contact your installer.

Refer to system diagram

section

“INSTALLATION

REQUIREMENTS” for

correct connection

method.

Malfunction

Maximum shower

temperature too hot.

Shower temperature too

cold.

Blend temperature

unstable.

Low or no water flow

Shower runs cool after a

short time (1 -2 minutes)

then flow splutters.

Cause

Incorrect setting of

maximum temperature.

Hot water cylinder

temperature less than

10°C above shower

temperature,

Maximum temperature

incorrectly set.

Spray plate blocked.

Inlet filter blocked.

Isolating valve partially

closed.

Plumbing system fault.

Isolating valves closed.

Inlet filters blocked.

Check valve fitted

incorrectly.

Appliance sited above

cold water storage

cistern.

Plumbing system fault

(airlock).

Air ingress into hot

pipework.

Fault Diagnosis

Malfunction

Shower runs for a short

time (30-60 seconds)

then flow reduces,

splutters or stops.

Aggravated when other

hot taps are in use. Less

evident on full cold.

Flow of water virtually

stops and surges on/off,

after a few minutes.

Shower runs cold after

5-10 minutes.

Shower temperature

affected by use of

adjacent hot/cold tap.

Pump does not stop.

Cause

Air is being sucked down

the vent pipe, as the hot

take off to the shower is

too high up the pipe.

Insufficient storage of

cold water in cistern.

Insufficient storage of

hot water in cylinder.

Insufficiently sized

pipework for both

systems to be used

together.

Micro-switch defective.

Pcb failure.

Remedy

Refer to system diagram

section

“INSTALLATION

REQUIREMENTS” for

correct connection

method.

Note the 1 metre hot

takeoff dimension.

Consider increasing cold

feed pipe to hot cylinder

to 28mm diameter.

Increase storage of cold

cistern.

Increase storage of hot

water.

Increase pipe sizes or

separately feed shower.

Refer to system

diagrams section

“INSTALLATION

REQUIREMENTS” for

correct connection

method.

Check power supply.

Renew.

Allow motor to cool

before further operation.

Renew.

Pump does not operate.

Electrical supply failure

Micro-switch failure.

Pcb failure.

Motor overheated,

thermal switch operated.

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Mira Essentials Power Installation & User Guide

Mira Essentials Power Installation & User Guide

Mira Essentials Power Installation & User Guide

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