Mira ElEMEnt thErMostatic MixEr installation and UsEr GUidE

Mira ElEMEnt thErMostatic MixEr installation and UsEr GUidE
Mira Element
Thermostatic Mixer
Installation and User Guide
These instructions must be left with the user.
1
Contents
Introduction
Introduction
2
Guarantee
3
Recommended Usage
3
Patents and Design Registration
3
Safety : Warnings
3
Pack Contents
4
Exposed Thermostatic Mixer
4
Built-in Thermostatic Mixer
4
Specifications
5
Temperatures
5
Thermostatic Shut-down
5
Connections
5
Flow Rates
5
Dimensions
6
Installation 7
General
7
Exposed Thermostatic Mixer
8
Built-in Thermostatic Mixer
Solid Wall or Stud Partition
Fixing using Rear Mountings
10
Panel Fixing using Securing
Brackets
12
Solid Wall or Stud Partition
Fixing using Securing Brackets 13
RAC Assembly
15
Control Assembly (Built-in Models)
17
Reversed Inlet Supplies
18
Operation
19
20
21
21
22
24
Exposed Thermostatic Mixer
24
Built-in Thermostatic Mixer
25
RAC Assembly
Accessories
Customer Service
These products have been certified as Type 2
valves under the BUILDCERT TMV2 scheme.
They also complies with the Water Supply (water
fittings) Regulations 1999.
19
Fault Diagnosis
Spare Parts
Mira Element Built-in: Thermostatic Mixer for
connection to concealed pipework, supplied with
L14D BIV shower fittings or BIR showerhead arm
and deluge head.
19
Type 2 Valves
Fault Diagnosis
Mira Element Exposed: Thermostatic Mixer for
connection to rising, falling or rear entry pipework,
supplied with L14D EV shower fittings.
10
Maintenance
The thermostatic mixer incorporates a wax
capsule temperature sensing unit, which provides
an almost immediate response to changes in
pressures or temperature of the incoming water
supplies to maintain the selected temperature. An
adjustable maximum temperature stop is provided
which limits the temperature to a safe level.
Inlet filters are fitted to protect the thermostatic
cartridge.
7
Suitable Plumbing Systems
Maximum Temperature Setting
The Mira Element thermostatic mixer is a
thermostatic shower control with a single control
lever for on/off and temperature control.
There is no adjustable flow control. A 12 L/Min flow
regulator is supplied for high pressure systems to
reduce excessive shower force.
5
Pressures
Commissioning
Thank you for purchasing a quality Mira product. To
enjoy the full potential of your new product, please
take time to read this guide thoroughly, having
done so, keep it handy for future reference.
If you experience any difficulty with the
installation or operation of your new
thermostatic mixer, please refer to ‘Fault
Diagnosis’, before contacting Mira Showers.
Our contact details can be found on the back
cover of this guide.
26
27
Back Page
2
Guarantee
Safety : Warnings
For domestic installations, Mira Showers
guarantee the Mira Element against any defect
in materials or workmanship for a period of five
years from the date of purchase (shower fittings
for one year).
For non-domestic installations, Mira Showers
guarantee the Mira Element against any defect
in materials or workmanship for a period of one
year from the date of purchase.
Mira thermostatic mixers are precision engineered
and should give continued safe and controlled
performance, provided:
1.They are installed, commissioned, operated and
maintained in accordance with manufacturer’s
recommendations.
2.Type 2 Valves are only used for applications
covered by their approved designations, refer
to section: ‘Type 2 Valves’.
3. Periodic attention is given, when necessary,
to maintain the product in good functional
order.
Caution!
1.Read all of these instructions.
2.Retain this guide for later use.
3. Pass on this guide in the event of change of
ownership of the installation site.
4. Follow all warnings, cautions and instructions
contained in this guide.
5. Anyone who may have difficulty understanding
or operating the controls of any shower should
be attended whilst showering. Particular
consideration should be given to the young,
the elderly, the infirm or anyone inexperienced
in the correct operation of the controls.
6. Rapid/Excessive movement of the flow and/
or temperature control levers may result in
momentary unstable blend temperatures.
7.Care is required when adjusting flow or
temperature, make sure that the temperature
has stabilised.
8. When this product has reached the end of its
serviceable life, it should be disposed of in a
safe manner, in accordance with current local
authority recycling, or waste disposal policy.
For terms and conditions refer to the back cover
of this guide.
Recommended Usage
Application
Valve with
Fittings
Domestic
ü
Light Commercial
ü
Heavy Commercial
û
Healthcare
û
Patents and Design Registration
Patents:
GB:
Euro:
USA:
2 291 693, 2 392 225, 2 421 297,
2 422 886
1 672 257 DE FR GB IT NL SE
7 240 850
Patent Applications:
GB:
0621637.8, 2 456 271
Euro:
03254070.0, 07015846.4
USA:
2006-0124758-A1, 2007-0221740-A1
World: WD 2008/053207
Design Registration:
000555768-0006, 000555768-0007
3
Built-in Thermostatic Mixer
Pack Contents
q 1 x Thermostatic Mixing Valve
Tick the appropriate boxes to familiarise yourself
with the part names and to confirm that all of the
parts are included.
(attached to the building-in shroud)
Exposed Thermostatic Mixer
q 1 x Thermostatic Mixing Valve
q 1 x Control Assembly
q 3 x Compression Nuts
q 3 x Olives
q 2 x Concealing Plates
q 2 x Wall Plugs
q 2 x Compression Nuts
q 2 x Fixing Screws
q 1 x 2.5 mm Hexagonal Key
q 2 x Olives
q 2 x Wall Plugs
q 1 x ‘O’ Key
q 2 x Fixing Screws
q 1 x Flow Regulator
q 1 x 2.5 mm Hexagonal Key
q 2 x Securing Brackets
q 1 x Flow Regulator
q 2 x Bracket Securing
Screws
q 2 x M5 x 40 mm
Securing Screws
q 1 x ‘O’ Key
Not Illustrated
Documentation
q 1 x RAC Assembly
(BIV models only)
Documentation
q 1 x Guarantee Registration Document
q 1 x Installation Template
q 1 x Guarantee Registration Document
4
Flow Rates
Specifications
Typical flow rates on high pressure systems (1 to
5 Bar) with 12 L/Min flow regulator fitted - Mira
Element with L14D Shower Fittings
For Type 2 Valves, the supply conditions specified
in section: ‘Type 2 Valves - Application’ take
precedence over the operating parameters which
follow.
Pressures
•
Flow Rate (L/Min)
• Max Static Pressure: 10 Bar.
• Max Maintained Pressure: 5 Bar.
• Min Maintained Pressure (Gravity System):
0.1 Bar (0.1 bar = 1 Metre head from cold tank
base to showerhead outlet).
Note! For gravity fed or other low pressure
systems (0.5 bar or below) do not fit the outlet
flow regulator.
For optimum performance supplies should be
nominally equal.
Flow Rate (L/Min)
• Factory Pre-set (Blend) Shower: 41°C.
• Optimum Thermostatic Control Range: 35°C
•
•
0
1
2
3
Supply Pressure (Bar)
4
5
Typical flow rates on low pressure systems (0.1 to
1 Bar) Mira Element with L14D Shower Fittings
Temperatures
•
15
13
12
11
10
9
8
7
6
5
4
to 43°C (achieved with supplies of 15°C cold,
65°C hot and nominally equal pressures).
Recommended Hot Supply: 60°C to 65°C
Note! The mixing valve can operate at
higher temperatures for short periods without
damage, however this could detrimentally
affect thermostatic performance. For safety
and performance reasons it is recommended
that the maximum hot water temperature is
limited to 65°C.
Cold Water Range: up to 25°C.
Minimum Recommended Differential between
Hot Supply and Outlet Temperature: 12°C.
Thermostatic Shut-down
• For safety and comfort the thermostat will
shut off the mixing valve within 2 Seconds if
either supply fails (achieved only if the blend
temperature has a minimum differential of
12°C from either supply temperature).
Connections
• Inlets: 15 mm Compression.
• O u t l e t : ½ ” B S P F l a t F a c e / 1 5 m m
Compression
• Standard connections are: hot - left, cold right, outlet - bottom (EV models), top (BIV
and BIR models).
5
24
22
20
18
16
14
12
10
8
6
4
0
0.4
0.8
1.2
Supply Pressure (Bar)
1.6
2
Dimensions
Exposed Thermostatic Mixer
104
153
Ø56
Ø62
121
35
Built-in Thermostatic Mixer
108
Ø183
30
67 - 85
56
Building-in Depth
All dimensions in mm
6
6.Decide on a suitable position for the Mixer.
The position of the Mixer and the Shower
Fittings must provide a minimum gap of 25 mm
between the spill-over level of the shower tray/
bath and the showerhead (refer to illustration).
This is to prevent back-siphonage. For further
information on the installation of your Shower
Fittings, refer to the Fittings Installation and
User Guide.
Note! Only use Shower Fittings recommended
by the manufacturer or supplier.
Installation
Suitable Plumbing Systems
Gravity Fed:
The thermostatic mixer must be fed from a cold
water cistern (usually fitted in the loft space) and
a hot water cylinder (usually fitted in the airing
cupboard) providing nominally equal pressures.
Mains Pressurised Instantaneous Hot Water
System (Combination Boiler):
The thermostatic mixer can be installed with
systems of this type with balanced pressures.
(Recommended Minimum Maintained Pressure:
1.0 Bar).
Hose Retaining Ring
Unvented Mains Pressure System:
The thermostatic mixer can be installed with an
unvented, stored hot water system.
Pumped System:
The thermostatic mixer can be installed with an
inlet pump (twin impeller). The pump must be
installed in a suitable location and in accordance
with its instructions.
25 mm Spill
Over Level
General
Installation must be carried out in accordance
with these instructions, and must be conducted by
designated, qualified and competent personnel.
The installation must comply with the “Water
Supply Regulations 1999 (Water Fittings)” or any
particular regulations and practices, specified by
the local water company or water undertakers.
Note! Make sure that all site requirements
correspond to the information given in section:
‘Specifications’. For Type 2 Valves see also
supply conditions in section: ‘Type 2 Valves’.
1. The Mixer must not be installed in an area
where it may freeze.
2. For stud partitions alternative fixings may be
required.
3.Isolating valves must be installed close to the
Mixer for ease of maintenance.
4. Pipework must be rigidly supported and avoid
any strain on the connections.
5. Pipework dead-legs should be kept to a
minimum.
7
Exposed Thermostatic Mixer
3. For solid walls drill the holes for the backplate
with a 6 mm drill and insert the wall plugs.
Note! For other types of wall structure
alternative fixings may be required (not
supplied).
Installing the Thermostatic Mixer
1.The thermostatic mixer can be installed with
rear, rising or falling supply inlets. Decide
on the most appropriate method for your
installation, and if necessary, loosen the
grubscrews and rotate the inlet elbows to
suit.
Important! Make sure that the elbows are
pushed fully onto the mixer before tightening
the grubscrews, do not overtighten.
Wall plug
6 mm Drill
4. For Rear Entry Supplies Only:
a)Drill the holes for the supply pipes at
153 mm centres.
b)Recess the inlet holes Ø32 mm x 10 mm
deep to allow for the concealing plates.
Note! Depth must be sufficient to prevent
the concealing plates fouling on the
plumbing elbows.
5. Fit the supply pipework: Hot ‑ Left, Cold
- Right. For rear entry supplies the inlet
pipework should extend 18 mm from the
finished wall surface, for rising or falling
supplies the centre of the pipe should be set
35 mm from the finished wall surface.
Note! If it is not possible to install the mixer
with this pipework configuration complete the
installation then refer to section: ‘Reversed
Inlet Supplies’.
2. Use the installation template to mark the
positions of the holes for the backplate and
the pipe centres.
For rising or falling supplies the pipe positions
should be set 35 mm from the centre of pipe
to the finished wall at 153 mm centres.
Note! Allow a minimum of 150 mm either side
of the mixer to allow servicing of the hot and
cold inlet filters.
18 mm from finished
wall surface
Allow a minimum of
150 mm either side
of mixer to wall
Ø32 mm
Elbow
35 mm
10 mm minimum
between elbow
and finished wall
surface
HOT
Recess Ø32 mm
x 10 mm deep
8
COLD
18 mm
153 mm
6.Remove the backplate from the mixer by
loosening the grubscrew with a 2.5 mm
hexagonal key.
7.Secure the backplate to the wall using the
screws.
Note! For high pressure systems (above
0.5 bar) make sure that the flow regulator
(supplied) is fitted inside the outlet nipple (refer
to illustration).
Important! The fitting of this flow regulator
will invalidate any TMV2 compliance due to
the minimum flow rate requirements. Do not
fit the flow regulator in TMV2 applications.
8. For Rear Entry Supplies Only:
a) Fit the concealing plates over the inlet
pipes.
Note! Apply silicone sealant to the back
face of the flange.
15.Turn on the hot and cold water supplies and
check for leaks.
16.Before using the shower, refer to section:
‘Commissioning’.
Concealing Plate
Apply Silicone Sealant
9. Caution! It is essential at this point
that the supply pipework is thoroughly
flushed through before connection to the
mixer. Failure to do so may result in product
malfunction and will not be covered under the
guarantee.
10.Fit the compression nuts and olives onto the
pipework.
11.Align the mixer with the pipework and fit onto
the backplate.
12.Tighten the compression nuts onto the mixer
with a suitable spanner.
Caution! Take care not to damage the chrome
surfaces.
13.Tighten the grubscrew to secure the mixer to
the backplate.
14.Fit the shower fittings, refer to your shower
fittings installation and user guide for
instructions.
9
Built-in Thermostatic Mixer
5.Cut away the plasterboard and/or brick work
to the required depth.
Important! This depth ‘X’ will depend on the
finished wall thickness e.g. tiles or facia board.
Refer to the table for this measurement.
For stud partitions depth ‘X’ refers to the
distance from the rear mounting e.g. timber
noggin, to the front of the wall (before tiling).
Solid Wall or Stud Partition Fixing
using Rear Mountings
1.Determine the route for the hot and cold supply
pipework and for the outlet pipework. When
connecting to the BIV Shower Fittings it is
recommended that the outlet be positioned
above and to one side of the mixer. This is to
prevent the flexible hose from obstructing the
shower controls.
2.Remove the two shroud screws (retain for later
use) and remove the building-in shroud from
the mixer.
3.Determine the position of the mixer and draw
around the building-in shroud.
Rear Mounting
Finished Wall
Surface
Finished Wall
Thickness
4. Mark the routes for the supply pipework at
108 mm centres (Hot ‑ Left, Cold - Right).
Falling Supplies: For falling supplies loosen
the grubscrew on each elbow using the 2.5 mm
hexagon key (supplied). Remove the elbows
and install on opposite sides. Retighten the
grubscrews.
Caution! Do not overtighten.
Note! Make sure that the ‘O’ seals are correctly
fitted and that the filter plugs are positioned to
the front (i.e. hexagonal key facing forward).
Alternative Pipe
Layouts
Outlet Pipe BIV
Depth ‘X’
Outlet Pipe BIR
Outlet Pipe BIV
Thermostatic
Mixer
Hot Inlet
Cold Inlet
10
Finished Wall Thickness
(e.g. tile and adhesive)
Wall Cutout Depth
‘X’
4 mm
81 - 63 mm
6 mm
79 - 61 mm
8 mm
77 - 59 mm
10 mm
75 - 57 mm
12 mm
73 - 55 mm
14 mm
71 - 55 mm
16 mm
69 - 55 mm
18 mm
67 - 55 mm
20 mm
65 - 55 mm
22 mm
63 - 55 mm
24 mm
61 - 55 mm
6. Make sure that the mixer is level and central
in the hole, and square to the finished wall
surface (or the control components will not fit
correctly), then mark the positions of the fixing
screw holes on the wall.
7. For solid walls drill two 6 mm holes for the wall
plugs.
8. Fit the hot and cold supply pipes (Hot - Left,
Cold - Right).
9. Caution! It is essential at this point
that the supply pipework is thoroughly
flushed through before connection to the
mixer. Failure to do so may result in product
malfunction and will not be covered under the
guarantee.
10.Insert the wall plugs (supplied) and attach the
mixer to the wall with the screws provided.
Note! For stud partition installations alternative
fixings may be required (not supplied) to fix the
mixer to the rear face of the wall cavity or to a
timber noggin.
11.Make sure that the olives are fitted and connect
the hot and cold supply pipes and tighten the
compression nuts.
13.Turn on the water supplies and check for
leaks.
14.Refit the building-in shroud to the mixer using
the two shroud screws removed earlier.
15.Using the ‘Finished Wall Indicator’ on the
building-in shroud as a guide, finish the wall,
e.g. tiles.
Caution! Make sure that the finished wall
is within the maximum and minimum limits
and to an even depth (no greater than 2 mm
variation) or the control components will not fit
correctly.
Minimum finished
wall surface
Finished Wall
F9802
Min
Max
Maximum finished
wall surface
Outlet Pipe to Fittings
16.Remove the two shroud screws (retain for later
use) and remove the building‑in shroud.
17.Fit the concealing plate and control assembly,
refer to section: ‘Control Assembly’.
Screws
Cold Supply
Hot Supply
12.Connect the outlet pipework and install the
RAC assembly or BIR assembly, before
continuing with the installation of the mixing
valve.
RAC assembly, go to section: ‘Installation,
RAC Assembly’.
BIR assembly, refer to your shower fittings
installation and user guide then continue with
instruction 13.
11
Panel Fixing using Securing
Brackets
7. Caution! It is essential at this point
that the supply pipework is thoroughly
flushed through before connection to the
mixer. Failure to do so may result in product
malfunction and will not be covered under the
guarantee.
8.Secure the mixer with the M5 x 40 mm screws
as shown.
Note! For laminated panels the mixer must be
positioned from the rear of the panel.
Panel thickness must be between 4 and 12 mm
(if a thicker panel is used, it will be necessary
to recess the securing brackets into the rear of
the panel).
Important! Make sure that there is a minimum
clearance of 64 mm behind the laminated panel
to house the mixer.
1.Refer to section: ‘Solid Wall or Stud Partition
Fixing using Rear Mountings’ and follow
instructions 1 to 4.
2. Carefully cut out the laminated panel.
3. Fit the securing brackets to the mixer.
Important! The securing brackets must be
fixed vertically, as illustrated.
Important! Make sure that the correct holes
are used, otherwise the backplate cannot be
fitted.
4. Position the mixer on the front of the panel,
make sure that it is level and central in the
hole, then mark the position of the M5 fixing
holes.
Important! Make sure that the correct holes
are used (refer to illustration).
Note! Make sure that the Filter Plugs are
positioned so that they can be removed for
servicing.
Backplate
Securing Hole
M5 x 40 mm
Fixing Screws
9. Make sure that the olives are fitted, connect
the hot and cold supply pipes and tighten the
compression nuts.
10.Connect the outlet pipework and install the
RAC assembly or BIR assembly, before
continuing with the installation of the mixing
valve.
RAC assembly, go to section: ‘Installation,
RAC Assembly’.
BIR assembly, refer to your shower fittings
installation and user guide then continue with
instruction 11.
M5 Fixing Hole
Filter Plug
Outlet Pipe to
Fittings
Backplate
Securing Hole
M5 Fixing Hole
Cold Supply
5.Drill the two 5.5 mm holes for the fixing
positions (countersink the holes at the front).
6. Fit the hot and cold supply pipes (Hot - Left,
Cold - Right)
Hot Supply
12
Solid Wall or Stud Partition Fixing
using Securing Brackets
11.Turn on the water supplies and check for
leaks.
12.Fit the concealing plate and control assembly,
refer to section: ‘Control Assembly’.
1.Refer to section: ‘Solid Wall or Stud Partition
Fixing using Rear Mountings’ and follow
instructions 1 to 4.
2.Remove the plasterboard and/or brick work to
a minimum depth of 62 mm.
6 mm Min
Finished Wall
Finished Wall
Surface
Securing
Bracket
24 mm Max
Finished Wall
62 mm Min
3. Fit the securing brackets to the mixer with the
bracket securing screws.
Important! Make sure that the correct holes
are used, otherwise the backplate cannot be
fitted.
Note! The securing brackets can be rotated
for suitable fixing points.
Countersunk Fixing Hole
Rotate for Suitable Fixing Point
Backplate Securing Hole
Backplate Securing Hole
Note! Securing Brackets shown
in preferred position to allow the
Compression Nuts to be tightened.
13
4. Make sure that the mixer is level and mark the
positions for the countersunk fixing holes on
the wall.
5. For solid walls drill two 6 mm holes for the wall
plugs.
Caution! Do not drill into pipes in the wall.
6. Fit the hot and cold supply pipework (Hot Left, Cold - Right).
7. Caution! It is essential at this point
that the supply pipework is thoroughly
flushed through before connection to the
mixer. Failure to do so may result in product
malfunction and will not be covered under the
guarantee.
8.Insert the wall plugs (supplied) and attach the
mixer to the wall with the screws provided.
Note! For stud partition installations alternative
fixings may be required (not supplied).
9. Make sure that the olives are fitted, connect
the hot and cold supply pipes and tighten the
compression nuts.
10.Connect the outlet pipework and install the
RAC assembly or BIR assembly, before
continuing with the installation of the mixing
valve.
RAC assembly, go to section: ‘Installation,
RAC Assembly’.
BIR assembly, refer to your shower fittings
installation and user guide then continue with
instruction 11.
11.Turn on the water supplies and check for
leaks.
12.Turn on the water supplies and check for
leaks.
13.Refit the building-in shroud to the mixer using
the two shroud screws removed earlier.
14.Using the ‘Finished Wall Indicator’ on the
building-in shroud as a guide, finish the wall,
e.g. tiles.
Caution! Make sure that the finished wall
is within the maximum and minimum limits
and to an even depth (no greater than 2 mm
variation) or the control components will not fit
correctly.
Minimum finished
wall surface
Finished Wall
F9802
Min
Max
Maximum finished
wall surface
15.Remove the two shroud screws (retain for later
use) and remove the building‑in shroud.
16.Fit the concealing plate and control assembly,
refer to section: ‘Control Assembly’.
Outlet Pipe to Fittings
Screws
Cold Supply
Hot Supply
14
RAC Assembly
6. Place the RAC backplate over the outlet pipe
with the arrow pointing up. The screw holes
should be at 45° to the horizontal.
7. Mark the positions of the two RAC backplate
fixing holes and drill two Ø5.5 mm holes.
Caution! Make sure that you do not drill into
pipework in the wall.
8. Hold the RAC wall plate in position on the rear
of the partition, insert the two backplate screws
and secure the RAC backplate to the wall
plate. Make sure that the foam seal abuts the
finished wall surface. Go to instruction 18.
1. Before the RAC assembly can be fitted you
must have first installed your built-in shower
control and have connected the inlet and outlet
pipework.
Important! Make sure that the outlet pipework
protrudes through a Ø25 mm hole in the wall
or stud partition by at least 40 mm.
Note! For stud partition installations where
access to the rear of the partition is possible,
fit the RAC wall plate over the outlet pipework
on the inside of the partition.
For stud partition installations where access
to the rear of the wall is not possible, follow
instructions for solid wall installations, making
sure that suitable wall fixings (not supplied) are
used to secure the wall plate to the outside of
the stud partition.
RAC Backplate
Backplate
Screws
RAC Wall Plate
(shown fitted for rear
access stud partitions only)
9.Loosely attach the RAC backplate to the RAC
wall plate, using the two backplate screws
provided.
10.Place the RAC backplate/wall plate assembly
over the outlet pipe with the arrow pointing
vertically up. The screw holes should be at
40° to the horizontal.
11.Mark the positions of the two RAC wall plate
fixing holes.
40 mm
Outlet Pipe to Fittings
Mixing Valve
Wall Plate
2.Temporarily cap off the outlet pipe, turn on the
water supplies and check for leaks.
3. Determine the finished wall position (e.g. tile
thickness). Turn off the water supply, carefully
uncap the outlet pipe and cut to length, the
outlet pipe must protrude through the finished
wall surface by 21–23 mm.
Note! Remove any burrs from the pipes before
proceeding.
4. For solid wall installations or stud partition
installations without rear access go to
instruction 9.
For stud partition installations with access
to the rear of the partition continue with
instruction 5.
5. Finish the wall, e.g. tiles.
Arrow
40°
RAC Backplate
Backplate Screws
12.R emove the assembly from the wall and
separate the backplate from the wall plate.
15
13.For solid walls drill two Ø6 mm holes for the
wall plugs. For other types of wall structure
alternative fixings may be required (not
supplied). If necessary, make a recess 6 mm
deep to accept the wall plate for flush fitting of
the outlet to the wall surface.
Caution! Make sure that you do not drill into
pipework in the wall.
14.Fit the two wall plugs supplied and secure the
wall plate to the wall with the two wall plate
screws.
15.Make sure that there is clearance behind the
wall plate and temporarily fit the two backplate
screws into the wall plate. This will prevent
the fixing holes from becoming blocked with
plaster or grout.
16.Finish the wall, e.g. tiles.
17.Place the backplate over the outlet pipe with
the arrow pointing vertically up and tighten the
two backplate screws. Make sure that the foam
seal abuts the finished wall surface.
Olive
Backplate Nut
Elbow
Shroud
21.This completes the installation of the RAC
assembly.
RAC Backplate
Backplate
Screws
18.Check that the blue ‘O’ seal is fitted inside the
backplate nut. Fit the olive and the backplate
nut over the outlet pipe and tighten the nut.
19.Check that the second ‘O’ seal (black) is fitted
to the outside of the backplate nut. Press
the elbow onto the backplate, make sure
that the clips on the elbow engage with the
backplate.
20.P ress the shroud over the elbow, make
sure that it engages with the lugs on the
backplate.
16
Control Assembly (Built-in Models)
6. With the lug in the 8 o’clock position fit the
bearing into the concealing plate.
7. Make sure that the hub is positioned fully
clockwise and refit the control lever with
the grubscrew at the bottom, retighten the
grubscrew and refit the washer and control
lever handle.
1. Unscrew and remove the control lever handle
and washer.
2.Loosen the grubscrew (by approximately
4 turns) and pull off the control lever and
bearing.
3. Carefully unclip the concealing plate from the
backplate.
Note! Use a screwdriver in the cutout to assist
separation.
Hub
Backplate
Bearing
Concealing Plate
Lug
Bearing
Control Lever
Cutout
8. Before using the shower, refer to section:
‘Commissioning’.
Control Lever Handle
4. Align the slots in the backplate with the lugs on
the hub, and attach the backplate to the mixer
using the two shroud screws removed earlier.
Tighten the screws until the foam seal is fully
compressed. Do not overtighten.
5. With the cutout at the bottom, locate the
concealing plate over the mixer, engage the
crosses in the concealing plate with the square
recesses in the backplate, and push firmly until
the concealing plate clicks into position.
Align the Hub with the
slots on the Backplate
Washer
Control Lever Handle
Grubscrew
Washer
Control Lever
Grubscrew
Cutout
17
5. Fit the ‘O’ Key (supplied) onto the cartridge nut
and turn anticlockwise. Unscrew fully and pull
the cartridge from the mixer body.
Reversed Inlet Supplies
The Mira Element thermostatic mixer is supplied
with inlet connections Hot - Left, Cold - Right
as standard. If the hot and cold water supply
pipes have been reversed during installation
the thermostatic cartridge must be removed and
rotated 180°.
1.Isolate the hot and cold water supplies and
operate the control lever to relieve pressure
and drain any residual water.
2. Unscrew and remove the control lever handle
and washer.
3.Loosen the grubscrew (by approximately
4 turns) and pull off the control lever and
bearing.
4. Built-in Models Only:
4.1Carefully unclip the concealing plate from
the backplate.
Note! Use a screwdriver in the cutout to
assist separation.
4.2 Unscrew the two shroud screws and
remove the backplate from the mixer.
Cartridge Seal
6.Rotate the Cartridge 180°.
7. Make sure that the two cartridge inlet seals are
fitted and carefully push into the body, aligning
the cartridge lugs into the body slots.
Note! Check that the cartridge lug stamped
‘H’ is aligned with the hot inlet supply.
Important! Take care when fitting the cartridge
as damage to the cartridge inlet seals may
result in dripping from the shower head.
8.Tighten the nut by turning the ‘O’ key
clockwise.
9. Built-in Models Only: Refer to section:
‘Control Assembly (Built-in Models)’ and
follow instructions 4 to 9.
10.With the lug in the 8 o’clock position fit the
bearing into the concealing plate (refer to
illustration).
11.Make sure that the hub is positioned fully
clockwise and refit the control lever with
the grubscrew at the bottom, retighten the
grubscrew and refit the washer and control
lever handle.
12.Before using the Shower, refer to section:
‘Commissioning’.
Backplate
Concealing Plate
Bearing
Cutout
Control Lever
Grubscrew
Washer
Control Lever Handle
Built-in model shown
18
3.Loosen the grubscrew (by approximately
4 turns) and pull off the control lever and
bearing.
4.Turn on the shower to the maximum temperature
by rotating the hub fully anticlockwise and
allow the temperature to stabilise.
5. Unscrew the hub retaining screw with a
2.5 mm hexagon key.
6.Insert the 2.5 mm hexagon key into the centre
of the spindle and engage with the recessed
temperature adjusting screw.
7. Rotate the hexagon key until the required
maximum temperature is obtained at the
shower. Turn anticlockwise to increase the
temperature, or clockwise to decrease the
temperature (¼ turn = approximately 1°C).
Operation
The Mira Element thermostatic mixer is a
thermostatic shower control with a single control
lever for on/off and temperature control.
The Control Lever operates anti-clockwise in the
following sequence:
• Off
• On
• Cold
• Warm
• Maximum Preset Temperature
Hub
Maximum Preset
Temperature
Hub Retaining Screw
Control Lever Handle
Bearing
Lug
Grubscrew
Off
Washer
Control Lever
Commissioning
8.Once the desired maximum blend temperature
has been achieved turn off the shower.
9. Refit the hub retaining screw.
10.With the lug in the 8 o’clock position refit the
bearing.
11.Make sure that the hub is positioned fully
clockwise and refit the control lever with
the grubscrew at the bottom, retighten the
grubscrew and refit the washer and control
lever handle.
12.C heck that the showering temperature is
correct.
Maximum Temperature Setting
Before using the shower the maximum temperature
must be checked to make sure that it is at a
safe level. It has been preset to approximately
41°C at the factory but due to variations in site
conditions the maximum temperature may need
adjustment.
Note! Make sure that the hot water temperature is
at least 55°C and that there is sufficient supply.
For Type 2 installations the maximum blend
temperature is determined by the application,
refer to section: ‘Type 2 Valves - Application’.
1. Turn on the shower to the maximum
temperature (i.e. fully anticlockwise) and allow
the temperature to stabilise.
If the temperature is too hot or too cold, turn
off the shower and adjust as follows:
2. Unscrew and remove the control lever handle
and washer.
19
The British Burns Association recommends 37
to 37.5°C as a comfortable bathing temperature
for children. In premises covered by the Care
Standards Act 2000, the maximum mixed water
outlet temperature is 43°C.
Type 2 Valves
Application
The approved designations for Type 2 Valves
are as follows:
Models
The thermostatic mixing valve will be installed in
such a position that maintenance of the TMV and
its valves and the commissioning and testing of
the TMV can be undertaken.
Designation
Mira Element
LP-S, HP-S
Important! The fitting of any flow regulator
will invalidate TMV2 compliance due to the
minimum flow rate requirements. Do not fit
flow regulators in TMV2 applications.
The fitting of isolation valves is required as close
as practicable to the water supply inlets of the
thermostatic mixing valve.
Conditions of use for Type 2 Valves
Operating Pressure
Range
High
Pressure
Low
Pressure
10
10
Maintained Pressure,
Hot and Cold (bar)
0.5 to 5
0.1 to 1
Hot Supply
Temperature (°C)
55 to 65
55 to 65
Maximum Static
Pressure (bar)
Commissioning notes for Thermostatic Mixing
Valves
The first step in commissioning a thermostatic
mixing valve is to check the following:
The designation of the thermostatic mixing valve
matches the application.
The supply pressures are within the valves
operating range.
The supply temperatures are within the valves
operating valve.
Isolating valves (and strainers preferred) are
provided.
If all of these conditions are met, proceed to
set the temperature as specified in section:
‘Commissioning’.
Cold Supply
≤25
≤25
Temperature (°C)
Valves operating outside these conditions cannot
be guaranteed to operate as Type 2 Valves.
Recommended Outlet Temperatures
The BuildCert TMV scheme recommends the
following set maximum mixed water outlet
temperatures for use in all premises:
44°C for bath fill, but see notes below;
41°C for showers;
41°C for washbasins;
38°C for bidets.
The mixed water temperatures must never
exceed 46°C.
The maximum mixed water temperature can be
2°C above the recommended maximum set outlet
temperatures.
Note! 46°C is the maximum mixed water
temperature from the bath tap. The maximum
temperature takes account of the allowable
temperature tolerances inherant in thermostatic
mixing valves and temperature losses in metal
baths.
It is not a safe bathing temperature for adults
or children.
Important! The mixed water temperature at the
discharge point must never exceed 46°C
20
It is a requirement that all TMV2 approved
valves shall be verified against the original
set temperature results once a year. When
commissioning/testing is due the following
performance checks shall be carried out.
Measure the mixed water temperature at the
outlet.
Carry out the cold water supply isolation test by
isolating the cold water to the TMV, wait for five
seconds if water is still flowing check that the
temperature is below 46°C.
If there is no significant change to the set outlet
temperature (±2°C or less change from the
original settings) and the fail-safe shut off is
functioning, then the valve is working correctly
and no further service work is required.
Notes! If there is a residual flow during the
commissioning of the valve or the annual
verification (cold water supply isolation test), then
this is acceptable providing the temperature of
the water seeping from the valve is no more than
2°C above the designated maximum mixed water
outlet temperature setting of the valve.
Temperature readings should be taken at the
normal flow rate after allowing for the system to
stabilise.
The sensing part of the thermometer probe
must be fully submerged in the water that is to
be tested.
Any TMV that has been adjusted or serviced must
be re-commissioned and re-tested in accordance
with the instructions given in this guide.
Fault Diagnosis
If you require a Mira trained service engineer or
agent, refer to section: ‘Customer Services’.
Fault Diagnosis
Symptom:
Only hot or cold water from the mixer outlet.
Outlet temperature too hot / too cold.
•
•
Cause / Rectification:
Inlets reversed (hot supply to cold supply).
No hot water reaching mixer.
Check the filters for any blockage.
Installation conditions outside operating
parameters, refer to sections: ‘Specifications’
and ‘Commissioning’.
•
•
•
•
—————————————
Symptom:
Fluctuating or reduced flow rate.
•
Cause / Rectification:
Check the showerhead, hose and filters for
any blockage and clean.
Make sure that the maintained inlet pressures
are nominally balanced and sufficient, refer to
section: ‘Specifications’.
Make sure that the inlet temperature
differentials are sufficient, refer to section:
‘Specifications’.
Flow regulator fitted incorrectly.
Air lock or partial blockage in the pipework.
•
•
•
•
•
The installation of thermostatic mixing valves must
comply with the requirements of the Water Supply
(Water Fittings) Regulations 1999.
—————————————
Symptom:
Water leaking from showerhead.
•
Cause / Rectification:
Normal for a short period after shut off.
Check that the pressures are not in excess of
the specifications for the product.
Renew the thermostatic cartridge.
•
•
•
21
Inlet Filters
The inlet filters should be checked and cleaned
as necessary every 12 months.
Note! The inlet filters must not be removed except
for cleaning. If the thermostatic mixer is operated
without the inlet filters fitted the warranty on the
product will be void.
Maintenance
General
This Product is precision engineered and should
give continued safe and controlled performance,
provided:
1.It is installed, commissioned, operated and
maintained in accordance with manufacturers
recommendations.
2. Periodic attention is given, when necessary,
to maintain the product in good functional
order.
The Mira Element thermostatic mixer is designed
to need only minimal maintenance in normal use.
The only serviceable parts are the inlet filters
which should be checked and cleaned every
12 months. If a malfunction occurs with the
thermostatic cartridge then this will necessitate a
complete cartridge replacement.
Note! The cartridge contains no internally
serviceable parts.
If you require a Mira trained engineer or agent,
refer to section: ‘Customer Service’.
Exposed Models
1.Isolate the hot and cold water supplies and
operate the control lever to drain any residual
water.
2.Carefully remove the filter blanking caps
and unscrew the filter caps with the ‘O key’
(supplied) or a 12 mm hexagonal wrench and
remove the filters.
Filter
Lubricants
Silicone based lubricants must only be used on
the rubber seals.
Caution! Oil based or other lubricant types may
cause rapid deterioration of seals.
‘O’ Seal
Filter Cap
Filter Blanking Cap
3. Clean the filters under a jet of water to remove
any lodged particles.
4. Refit the filters and tighten the filter caps.
Note! Make sure that the ‘O’ seal is fitted
correctly and not damaged.
5.Turn on the hot and cold water supplies and
check for leaks.
6. Refit the filter blanking caps.
Cleaning
The chrome plated parts should be cleaned using
a mild washing up detergent or soap solution,
rinsed and then wiped dry with a soft cloth.
Warning! Many household cleaners contain
abrasive and chemical substances, and should not
be used for cleaning plated or plastic fittings.
Do not use descalents on this product.
Built-in Models
Note! Refer to illustrations in section: ‘Control
Assembly (Built-in Models)’.
1.Isolate the hot and cold water supplies and
operate the control lever to drain any residual
water.
2. Unscrew the control lever handle, loosen the
grubscrew and pull off the control lever and
bearing.
3. Carefully unclip the concealing plate from the
backplate.
Note! Use a screwdriver in the cutout to assist
separation.
22
4. Unscrew the two shroud screws and remove
the backplate from the mixer.
5. Unscrew the filter caps with the ‘O key’
(supplied) or a 12 mm hexagonal wrench and
remove the filters.
Note! Use pliers to carefully remove the
filters.
Filter
‘O’ Seal
Filter Cap
6. Clean each of the filters under a jet of water
to remove any lodged particles.
7. Refit the filters and tighten the filter caps.
Note! Make sure that the seal is fitted correctly
and not damaged.
8. Turn on the hot and cold water supplies and
check for leaks.
9. Refer to section: ‘Control Assembly (Built-in
Models)’ and follow instructions 4 to 7.
23
Spare Parts
Exposed Thermostatic Mixer
1656.110
Seal Pack - Identified A
1656.116
Screw Pack - Identified B
1656.117
Inlet Connector Pack
1656.113
Backplate
B
B
A
A
1656.115
Outlet Connector Pack
1062477
Filter Pack (x2)
1656.114
Elbow Connector
Pack
1656.111
Elbow Cap
1663.265
Flow Regulator Pack
A
1062474
Cartridge Assembly
1656.112
Elbow Assembly
1656.118
Bearing
1656.119
Control Lever Pack
A
1617.196
Hub Pack
B
1656.121
Component Pack
1617.163
Control Lever Handle
1656.120
Trim Pack
1595.231
‘O’ Key
24
Built-in Thermostatic Mixer
1595.150
Elbow Assembly
B
1595.066
Filter Pack (x2)
1595.046
Seal Pack - Identified A
1595.067
Screw Pack - Identified B
A
A
B
1062474
Cartridge Assembly
A
B
1595.149
Outlet Connector Pack
A
1617.196
Hub
B
1063662
Bearing
1617.162
Control Lever Pack
1617.168
Concealing Plate Assembly
1617.163
Control Lever
Handle
1595.070
Component Pack
B
1595.231
‘O’ Key
25
1617.164
Trim Pack
RAC Assembly
450.20
RAC Mounting Pack
450.20
RAC Mounting Pack
1617.171
RAC Shroud
26
Accessories
Genuine Mira accessories can be purchased direct from Mira Customer Services (our contact details can
be found on the back cover of this guide) or from approved stockists or merchants.
Eco Showerhead
White - 2.1668.001
Chrome - 2.1668.002
The Eco shower head gives you an
invigorating shower, but reduces
water consumption and heating
costs.
Everclear Showerhead
White - 2.1616.030
Chrome - 2.1616.031
Mira's new Everclear range has been
specially designed for hard water
areas and reduces the risk of lime
scale build up.
Showerhead Holder
White - 1.1540.270
Chrome - 1.1540.271
An alternative to the traditional slide
bar. Often a useful addition when
positioned for the smaller members
of the family.
Wall Mounted Soap Dish
White - 1.1540.278
Chrome - 1.1540.279
Wall mounted for use anywhere in, or
outside the showering area.
Shower Seat
White - 2.1536.128
White/Chrome - 2.1536.129
For use in or out of the showering
area. Note! Must be installed onto a
solid wall.
Shower seat folds up when not in use
Double Outlet Check Valve (DCV-H)
Chrome - 1.0.110.55.1
DCV-H: An outlet double check valve,
designed to prevent the backflow
or backsiphonage of potentially
contaminated water, through shower
controls which are fitted with a
flexible hose as part of the outlet
shower fitting.
27
Customer Service
Guarantee
Your product has the benefit of our manufacturer’s
guarantee which starts from the date of purchase.
To activate this guarantee, please return your completed
registration card, visit our website or free phone 0800
0731248 within 30 days of purchase (UK only).
Within the guarantee period we will resolve defects in
materials or workmanship, free of charge, by repairing or
replacing parts or product as we may choose.
This guarantee is in addition to your statutory rights
and is subject to the following conditions:
● The product must be installed and maintained in
accordance with the instructions given in this user
guide.
● Servicing must only be undertaken by us or our
appointed representative. Note! if a service visit
is required the product must be fully installed and
connected to services.
● Repair under this guarantee does not extend the original
expiry date. The guarantee on any replacement parts
or product ends at the original expiry date.
● For shower fittings or consumable items we reserve
the right to supply replacement parts only.
The guarantee does not cover:
● Call out charges for non product faults (such as
damage or performance issues arising from incorrect
installation, improper use, lack of maintenance, build up
of limescale, frost damage, corrosion, system debris or
blocked filters) or where no fault has been found with
the product.
● Water or electrical supply, waste and isolation issues.
● Compensation for loss of use of the product or
consequential loss of any kind.
● Damage or defects caused if the product is repaired
or modified by persons not authorised by us or our
appointed representative.
● Routine maintenance or replacement parts to comply
with the requirements of the TMV 2 or TMV 3 healthcare
schemes.
Helpdesk Service
Our dedicated Customer Services Team is comprehensively
trained and can offer help and advice, spare parts,
accessories or a service visit. We will need you to have your
model name or number, power rating (if applicable) and date
of purchase. As part of our quality and training programme
calls may be recorded or monitored.
Mira Showers Website (www.mirashowers.co.uk)
From our website you can register your guarantee,
download additional user guides, diagnose faults, purchase
our full range of accessories and popular spares, refer to
our FAQ’s and request a service visit.
Spares and Accessories
We maintain extensive stocks of genuine spares and
accessories and aim to provide support throughout the
product’s expected life. Payment can be made by phone
at time of order using most major Credit or Debit cards and
we aim to despatch orders within two working days. Items
purchased from us are guaranteed for 12 months from date
of purchase. For safety reasons spares exposed to mains
voltages should only be fitted by competent persons.
Returns – items can be returned within one month of date of
purchase, providing that they are in good condition and the
packaging is unopened. Please obtain authorisation from
our Customer Services Team before return. We reserve the
right to apply a 15% restocking charge.
Service / Repairs
We have a nationwide team of Service Technicians who can
carry out all service or repair work to your product within the
guarantee period and beyond. You have the assurance of a
fully trained Mira Technician, genuine Mira spare parts and
a 12 month guarantee on any chargeable work done.
Payment should be made directly to the Service Technician
who will accept most major Credit or Debit cards.
To Contact Us
UK
Telephone: 0844 571 5000
Mon to Fri 8:00 am - 5:30 pm, Sat 8:30 am - 3:30 pm
E-mail: technical@mirashowers.com
If your product does not function correctly when you first Fax: 01242 282595
use it, contact your installer to check that it is installed By Post: Mira Customer Services Dept, Cromwell Road,
and commissioned in accordance with the instructions in Cheltenham, Gloucestershire, GL52 5EP
this manual.
Should this not resolve the issue, contact our Customer Eire
Services Team who will offer you or your installer advice and Telephone: 01 459 1344
if applicable arrange for a Service Technician to call.
Mon to Fri 9:00 am - 5:00 pm
If the performance of your product declines, check in this E-mail: sales@modernplant.ie
manual to see if simple home maintenance is required. If Fax: Dublin 01 459 2329
you require further assistance call our Customer Services
By Post: Modern Plant Ltd (Dublin),
Team.
Otter House, Naas Road, Clondalkin, Dublin 22
What to do if something goes wrong
Extended Guarantees
A selection of protection plans are available that
enable you to cover repair bills for the life of your policy
(excludes Eire). Ring 01922 471763 for more details.
Mira is a registered trade mark of
Kohler Mira Limited.
The company reserves the right to alter
product specifications without notice.
1129061-W2-A (1617/1656) (B93B/B93E)
5+!3
28
© Kohler Mira Limited, July 2009
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