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