Bristan OR2 SHXSM C Mounting instructions

Please keep this booklet for future
reference.
Installer, when you have read these
instructions please ensure you leave them
with the user.
Installation Instructions
and User Guide
Orta Thermostatic Surface
Mounted Bar Shower Valve
Model covered: OR2 SHXSM C

2
Contents
Thank you for choosing Bristan, the UK’s leading showers and taps expert.
Your Bristan shower valve is a thermostatic mixer incorporating a wax capsule
thermostat to ensure constant shower temperatures. These instructions are for your
guidance to a safe and successful installation and should be left with the user.
All products manufactured and supplied by Bristan are safe providing they are installed
correctly and receive regular maintenance in accordance with these instructions.
Important Safety Information............................................... 3
General Information ................................................................. 4
Product Features...................................................................... 5
Installation Requirements.................................................... 6-10
Flow Regulators................................................................... 9
Dimensions............................................................................... 11
Specifications ........................................................................... 12
Pack Contents ...................................................................... 13
OR2 SHXSM C ...................................................................... 13
Installation ........................................................................... 14-18
First Fix ................................................................................ 14
Second Fix............................................................................ 15
The Riser Rail ...................................................................... 16-18
Operation.............................................................................. 19
Commissioning......................................................................... 20
Maintenance ............................................................................. 21-23
Map of Hard Water Regions in the UK ................................ 23
Troubleshooting........................................................................ 24-25
Guarantee ................................................................................. 26-27
Service Policy............................................................................ 27

3
Important Safety Information
•Please read these instructions thoroughly and retain for future use.
•All products manufactured and supplied by Bristan are safe provided they are installed,
used correctly and receive regular maintenance in accordance with these instructions.
• If you are in any doubt about your ability to install this shower valve safely you must
employ the services of an experienced qualified plumber.
•These fittings need to be installed in accordance with, and meet the requirements of
the Water Supply (Water Fittings) Regulations 1999 and Scottish Byelaws 2004.
•Warning: Do not operate the shower valve if you suspect it is frozen. Do not site
the shower valve where it might be subjected to freezing conditions.
•Do not crush or kink the shower hose, this could damage the hose and cause leaks.
•Remove all packaging and check the contents for damage before starting installation.
•Before starting any installation please consider the following: before drilling into walls,
check that there are no hidden electrical wires, cables or water supply pipes. This can
be checked with the aid of an electronic detector.
•If power tools are used do not forget to: - Wear eye protection
- Unplug equipment after use
•Fitting isolating valves to the inlet feeds is required for ease of maintenance.
•Warning: Before installing the new shower valve it is essential that you thoroughly
flush through the pipework in order to remove any remaining swarf, solder, etc.
Failure to carry out this procedure could cause problems or damage to the workings of
the shower valve.
•This shower valve must not be modified in any way as this will invalidate the
guarantee.

4
General Information
Operating pressure range: Minimum 0.3 bar, Maximum 5.0 bar.
Maximum static pressure: 10.0 bar.
This product has been tested to comply with the BS EN 1287:1999 (LP) and BS 1111:1999
(HP) thermostatic mixing valve standards and satisfies the requirements of the water
supply (water fittings) regulations 1999 and current bylaws.
BS 6700 recommends the temperature of stored water should never exceed 65°C.
A stored water temperature of 60°C is considered sufficient to meet all normal
requirements and will minimise the build up of lime scale in hard water areas (see
Map of Hard Water Regions in the UK on page 23).
If the fitting is installed at low pressure (tank fed), then the minimum distance from the
highest installed position of the showerhead to the underside of the cold tank should be
at least 3 metres to ensure adequate performance.
If your water system has an insufficient head of water it may be necessary to install a
shower booster pump. Order through your Bristan stockist.
Note: Nominally equal (balanced) inlet supply pressures are recommended for optimum
performance with mixer showers.
These shower valves should be installed in compliance with the Water Regulations.
For further details contact your Local Water Authority.

5
Product features
Recommended Usage
Domestic Heavy
Commercial
Light
Commercial Health Care
1. Water Flow Control
Water flow settings:
To increase and decrease the flow of
water from the showerhead.
2. Temperature Control
Adjustable temperature control.
To increase and decrease the water
temperature.
The ‘temperature stop notch’ is factory set
to 38°C, but can be overridden by easing
the handle past the ‘notch’.
1
2

6
Installation Requirements
This shower valve must be installed
in compliance with current water
regulations. If you have any doubts about
the water regulation requirements contact
your local water services provider or use
the services of a professional plumber.
This shower valve is suitable for use with
the following water supply systems:
• Gravity Fed Hot and Cold
(pressure balanced)
• Gravity Fed Hot and Mains Cold
(differential pressure - see Specification
section on page 12)
• Instantaneous water heater
(combination boiler)
• Unvented System
• Pumped System
Gravity Fed Hot and Cold Gravity Fed Hot and Mains Cold
cold mains supply cold mains supply
Important: If you install this shower
valve with a gravity fed system, there must
be a minimum head (vertical distance)
from the underside of the cold water
storage tank to the showerhead position
of at least 3 metres.
Note: Pumped system (with Essex
flange) If you install this shower valve to
a pumped gravity fed system where the
minimum head (vertical distance) from
the underside of the cold water storage
tank to the top of the hot water cylinder
is less than 1 metre we recommend an
Essex flange is used as shown.
Flushing Pipe-work
Important: Before connecting the
shower valve (see ‘Installation’ on pages
14-15), supply pipe-work must be flushed
to clear debris before connecting the
shower valve. Debris will reduce the
performance and life of the shower.
3m min.
3m
min.

7
Installation Requirements
Unvented SystemInstantaneous Water Heater
Pumped System
cold mains supply
cold mains supply
cold mains supply
Pumped System (with Essex flange)
cold mains supply
1m min.
Key:
1m min.
50mm
If less
than 1m
see note.
Isolating
Valve
Reducing
Valve
Shower
Valve
Pump Essex
Flange

8
Installation Requirements
Conditions of use for Thermostatic mixer valves
High Pressure Low Pressure
Maximum Static Pressure (Bar) 10 10
Flow Pressure, Hot & Cold (Bar) 0.5 to 5 0.1 to 1
Hot Supply Temperature (˚C) 55 to 65 55 to 65
Cold Supply Temperature (˚C) Equal to or Less than 25 Equal to or Less than 25
If a water supply is fed by gravity then
the supply pressure should be verified
to ensure the conditions of use are
appropriate for the valve.
Recommended outlet
temperatures
We recommend 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
inherent in thermostatic mixing valves and
temperature losses in metal baths.
Warning: It is not a safe bathing
temperature for adults or children.
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.
The thermostatic mixing valve (TMV)
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.
The fitting of isolation valves is required
as close as is practical to the water supply
inlets of the thermostatic mixing valve.

9
Installation Requirements
Flow Regulators
This shower valve is supplied with a 7 litre
per minute flow regulator fitted in each
water inlet which must be left in place
when installed in conjunction with an
instantaneous water heater/combination
boiler.
Fitting both flow regulators and turning
the water heater/combination boiler to its
hottest setting, will ensure a sufficiently
hot water supply to the shower valve
during winter months (in the UK), when
the mains cold water supply is at its
coldest.
In the event that this shower valve is not
installed with an instantaneous water
heater/combination boiler, the flow
regulators may be removed. Please follow
the steps detailed to remove the flow
regulators.
Using a thin flat bladed screwdriver
or similar tool, carefully prise the flow
regulators out of both inlets (1& 2).
With the flow regulators removed from
the inlets, the plastic inserts (supplied)
must be fitted as shown, with the small
diameter first (3& 4).
1
2
3
4

10
Installation Requirements
This fitting needs to be installed in
accordance with the following Installation
Requirements and Notes (IRN) to ensure
they meet the requirements of the Water
Supply (Water Fittings) Regulations 1999
and the Scottish Byelaws 2004.
IRN R001: See text of entry for Installation
Requirements or Notes.
IRN R040 - Schedule 2-15 (1): The
fitting shall be installed so that its outlet
discharges above the spill-over level of
any fixed appliance as indicated below:-
For backflow protection in domestic or
installations up to, and including, Fluid
Category 3.
If the fitting cannot be installed as
indicated in the table opposite it shall be
installed as either aor bbelow:
a: with an approved double check valve
assembly or some other no less effective
backflow prevention device immediately
upstream of the inlet.
b: so that it draws water by gravity only
from a cistern, or cylinder having a
permanently open vent pipe, and the
distributing pipe supplies no other fittings
(other than a draining tap) at a lower level.
For backflow protection in premises or
installations up to, and including Fluid
Category 5.
The vertical distance of the outlet above
the spill-over level shall be not less
than 20mm or twice the diameter of the
inlet pipe to the fitting, which ever is the
greater. If the fitting cannot be installed
as indicated it shall be installed with a
backflow prevention arrangement suitable
for the Fluid Category.
Size of tap or
combination fitting
Vertical distance
of outlet above
spill-over level
1. Not exceeding ½” 20mm
2. Exceeding ½”
but not
exceeding ¾”
25mm
3. Exceeding ¾” 70mm

11
Dimensions (mm’s)
Size of tap or
combination fitting
Vertical distance
of outlet above
spill-over level
1. Not exceeding ½” 20mm
2. Exceeding ½”
but not
exceeding ¾”
25mm
3. Exceeding ¾” 70mm
117 74
660 *
*Note: The Riser rail wall brackets can
be positioned up or down the riser rail as
required. This allows any existing holes to
be reused or covered by the wall brackets.
The brackets can also be adjusted to sit in
the middle of the tiles or in the tile joints.
660
74
117
105 - 155
243
85
65

12
Specifications
Specifications
Inlet connections: 15mm compression with 105 - 155mm between centres.
Operating pressure range: Min. 0.3 bar - Max. 5.0 bar - Maximum recommended
imbalance between hot and cold supply should not exceed a ratio of 5:1.
Maximum outlet temp: Factory pre-set to 38°C at the temperature stop ‘notch’ which
can be overridden to 46°C (can be re-set to suit site conditions).
Supply requirements:
Minimum cold water supply temperature: 5°C.
Maximum cold water supply temperature: 25°C.
Maximum hot water supply temperature: 80°C.
(a maximum hot water supply temperature of 60 - 65°C is recommended for
ablutionary purposes)
Note: The inlet hot water temperature must be at least 10°C above the required blend
temperature (eg. shower temperature 43°C: minimum hot supply 53°C).
Minimum dynamic pressure: 0.3 bar.
Maximum dynamic pressure: 5.0 bar.
Maximum static pressure: 10.0 bar.

13
Pack Contents - OR2 SHXSM C
1Shower valve
2Cranked connectors x2
3Covers x2
4Filter washers x2
5Plastic inserts x2
6Showerhead (single function)
7 Rubber washers x2
8Shower hose
9Riser rail
10 Riser rail fixings x4/4
1
2
3
4
5
6
9
7
8
10

14
Installation - First Fix
Before Installation
Flush through the pipework to ensure
removal of debris. Turn off the mains
water supply and close any isolating
valves.
1. Prepare water supply pipes
The centres of the hot and cold water
supply pipes should be between 105mm -
155mm apart.
Important: Water supplies to the mixer
must be with hot on the left and cold on
the right when viewed from the front.
Finish the water supply pipes with ½” BSP
female adapters (not supplied), fitted flush
with the finished wall surface.
Important: As there are no backnuts or
fixing plates supplied, the shower valve
needs to be connected / supported with
rigid pipework. (Wall mount fittings for
exposed and concealed pipework are
available. Order through your Bristan
stockist.
2. Attach cranked connectors
Screw the cranked connectors (2) into
the water supply pipes (½” BSP female
adapters) using a suitable thread sealant.
Important: Ensure the centres of the
cranked connectors (2) are 130mm apart
and level with each other when secured
in place.
Note: If required, any decorating should
be complete now before starting the
Second Fix (page 15).
2
2

15
Installation - Second Fix
1. Fit covers
Ensure that the centres of the cranked
connectors (2) are 130mm apart and level
with each other.
Screw the covers (3) over the cranked
connectors (2), so they are flush against
the wall.
2. Attach shower valve
Place the filter washers (4) into the
shower valve fixing nuts.
Position the shower valve (1) against the
cranked connectors and carefully tighten
the shower valve fixing nuts onto the
cranked connectors. Do not overtighten.
Note: Take care not to damage the
finish of the shower valve fixing nuts.
Protect the chromium plated
surfaces with a cloth.
Cloth
3
3
4
4
1
Shower valve
fixing nuts
2
2

16
Installation - Riser Rail
1. Mark the position
Position the assembled riser rail on the
wall, bearing in mind the different heights
of people likely to use the shower and the
length of the hose when connected to the
shower.
With the riser rail vertical, mark the wall
bracket positions onto the wall.
Release the slider handle and remove the
slider and wall brackets from the rail.
2. Attach wall brackets
Remove the end caps and clamps from
the wall brackets.
Position the wall brackets in the marked
positions against the wall, ensure they
are vertically in line with each other and
mark the centres of the fixing holes onto
the wall.
Warning: Please check for any hidden
pipes and cables before drilling holes in
the wall.
Drill suitable holes and insert the wall
plugs. Securely attach the wall brackets to
the wall using the screws (10).
Tips: A piece of insulation or masking
tape positioned where holes are to
be drilled and before marking out the
exact position for the fixing holes will
help stop the drill bit from wandering,
particularly on a tiled surface.
When working near a basin, bath or
shower insert plug or cover waste to
prevent losing small parts.
Take care not to drop tools/equipment
into basin, bath or shower during
shower installation.
Slider
handle
Wall bracket
Wall bracket
10
Wall bracket
Note: If replacing an existing riser rail,
check to see if the existing holes can
be reused or covered by the new wall
brackets. Try to avoid drilling close to the
edge of tiles, drill in the middle of the tiles
or in the tile joints.

17
Installation - Riser Rail cont.
3.Insert rail clamps
Insert the rail clamps into both wall
brackets.
4. Insert riser rail
Push the riser rail up through the bottom
wall bracket.
Push the slider down onto the riser,
ensuring it is the correct way up - as
shown.
Then push the riser rail up through the
top wall bracket.
5. Tighten rail clamps
Centre the riser rail within the wall
brackets and tighten both clamps onto the
rail.
6. Fit wall bracket end caps
Push-fit the wall bracket end caps onto
both wall brackets.
Rail clamp
Bottom wall
bracket
End cap

18
Installation - Riser Rail cont.
Attaching the Shower hose
7. Connect shower hose to shower valve
Screw the shower hose (ribbed nut end)
onto the mixer ensuring that the rubber
washer is fitted.
8. Connect shower hose to showerhead
Screw the shower hose (conical end) onto
the showerhead ensuring that the rubber
washer is fitted.
Place the showerhead into the slider.

19
Operation
1
2
Water Flow Control (1)
Water flow settings:
Turn anti-clockwise to turn on and
increase the flow of water.
Turn clockwise to decrease the flow of
water and turn off.
Controls the amount or flow of water from
the showerhead.
Temperature Control (2)
Adjustable temperature control.
Turn anti-clockwise to increase the water
temperature.
Turn clockwise to decrease the water
temperature.
The temperature stop ‘notch’ is factory set
to 38°C, but can be overridden by easing
the handle past the ‘notch’.
Riser rail
Turning the slider handle will allow the
slider to be raised and lowered and the
angle of the showerhead to be adjusted.
Slider
handle

20
Commissioning
Commissioning notes for
Thermostatic Mixing Valves
The first step in commissioning a
thermostatic mixing valve is to check the
following:
1. The designation of the thermostatic
mixing valve matches the application.
2. The supply pressures are within the
valves operating range.
3. The supply temperatures are within the
valves operating range.
4. Isolating valves (and strainers
preferred) are provided.
If all these conditions are met, proceed to
set the temperature as stipulated in the
Maintenance section.
The mixed water temperature at the
terminal fitting must never exceed 46˚C.
We recommend all shower valves
are 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 supply 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 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 in the Maintenance section.
The installation of thermostatic mixing
valves must comply with the requirements
of the Water Supply (Water Fittings)
Regulations 1999.