Mira Essentials Power Installation & User Guide

Mira
Brand
Mira
Model
Essentials Power
Category
Sanitary ware
Type
Installation & User Guide
1
INSTRUCTION MANUAL
POWER SHOWER
THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER
Thermostatic
back
2
Contents
Page
Introduction ................................................................... 3
Important Safety Information ................................................... 3
Pack Contents Checklist .......................................................... 4
Dimensions ................................................................... 5
Specifications ............................................................................ 6
Installation Requirements ........................................................ 8
Installation ................................................................... 8
Commissioning ....................................................................... 15
Operation ................................................................................. 17
Fault Diagnosis ....................................................................... 18
Maintenance ............................................................................ 20
Spare Parts .............................................................................. 21
Guarantee, Customer Care Policy, and How to contact us
.............................................................................. Back cover
3
Description
The Thermostatic 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. The thermostatic mixer
incorporates a wax capsule sensing unit and ceramic disc technology
for flow control.
Designed to be surface mounted the Thermostatic Power Shower
comes complete with an adjustable spray handset with three settings,
flexible hose, adjustable slider, sliding rail, soap tray and bracket.
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.
The function of a thermostatic mixing valve is to deliver water
consistently at a safe temperature. In keeping with every other
mechanism, it cannot be considered as functionally infallible and
as such, cannot totally replace a supervisor’s vigilance where that
is necessary. Provided it is installed, commissioned, operated and
maintained within manufacturers recommendations, the risk of
failure, if not eliminated, is reduced to the minimum achievable.
Introduction
4
Contents
Check the contents of the box are included before installation.
Thermostatic Power Shower
Pack Contents
5
Dimensions
6
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
7
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 Thermostatic Power Shower has been designed to
comply with the requirements of UK Water Regulations/Bye-laws
(Scotland).
The Essentials Thermostatic Power Shower complies with all the
relevant EC directives.
8
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.
9
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. Power supply cable should be 1mm² x 3 core flex.
3. 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.
4. 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.
5. A 30mA RCD (residual current device) is recommended. This may
be part of the consumer unit or a separate unit.
10
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.
11
Warning! Do not fix the shower
unit to the wall until plumbing and
electrical installations have been
completed.
1. Pull off inner temperature
control, temperature indicator
and outer flow 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.
Thermostatic Power Shower
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.
12
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.
13
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.
14
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 flow control,
temperature indicator and
inner temperature control
onto the respective keyways.
15
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.
Do not turn on electrical
supplies.
3. Turn the outer flow control
fully on.
4. Rotate the inner 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
Outer
Flow
Control
Inner
Temperature
Control
Cooler
Warmer
16
Maximum Temperature Setting
It may 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 outer flow control
anticlockwise to full on.
2. Turn the inner temperature
control lever anticlockwise
until maximum rotation has
been achieved.
3. Check temperature.
4. If temperature requires
adjustment, with the unit
running, pull the inner
temperature control from the
unit.
5. Insert a thin bladed
screwdriver down the centre
of the temperature spindle,
turn anticlockwise to
increase or clockwise to
decrease temperature.
6. Refit inner temperature
control and turn off.
Outer
Flow
Control
Inner
Temperature
Control
Maximum
Preset
Temperature
17
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 outer flow control
knob until the desired flow of
water is obtained. The flow of
water will increase the further
the control is turned.
2. Turn the inner temperature
control anticlockwise for
warmer water and clockwise
for cooler water, the numbers
indicate the relative
temperature:
1 = cold
4 = tepid
7 = Hot
Thermostatic Power Shower
Operation
Outer
Flow
Control
Inner
Temperature
Control
Maximum
Preset
Temperature
18
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.
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
19
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 operate.
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.
Electrical supply failure
Micro-switch failure.
Pcb failure.
Motor overheated,
thermal switch operated.
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.
Renew.
Allow motor to cool
before further operation.
Renew.
Renew.
20
Many household cleaners contain abrasive and chemical substances,
and should not be used for cleaning plated or plastic fittings. These
finishes should be cleaned using a mild washing up detergent or soap
solution, rinsed and then wiped dry with a soft cloth.
Cleaning Inlet Filters
Warning! Isolate the electrical
and water supplies before
proceeding.
1. Remove unit controls and
front cover (see
INSTALLATION).
2. Remove retaining screw and
filter cap.
3. Remove filters and clean.
4. Grease ‘o’ seals and fit to
filter cap.
5. Refit in reverse order.
6. Restore the water supplies
and check for leaks.
7. Refit cover, retaining screw
and controls.
8. The unit will have to be
commissioned again (see
COMMISSIONING).
9. Restore electrical supplies.
Maintenance
Cleaning
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Mira Essentials Power Installation & User Guide

Mira
Brand
Mira
Model
Essentials Power
Category
Sanitary ware
Type
Installation & User Guide
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