Bristan KN2 SHXAR C Mounting instructions

Installation Instructions
and User Guide
Colonial Thermostatic
Surface Mounted Mini
Shower Valve with
Adjustable or Rigid Riser
Models covered: KN2 SHXAR C,
& KN2 SHXRR C
Please keep this booklet for future
Reference.
Installer, when you have read these
instructions please ensure you leave them
with the user.

Contents
Thank you for choosing Bristan, the UK’s leading taps and showers expert. We have
designed this product with your enjoyment in mind. To ensure that it works to its
full potential, it needs to be fitted correctly. These fitting instructions have been
created to give you all of the information you need and, if you need any further help,
please do not hesitate to give us a call on 0330 026 6273.
Important Safety Information ………………………………………………………….
General Information ………………………………………………………………………..
Product Features …………………………………………………………………………….
Specifications …………………………………………………...................................
Dimensions ………………………………………………………................................
Pack Contents ………………………………………………………………………………..
Installation Requirements ……………………………………….........................
Flow Regulators ………………………………………………………………………........
Prior to Installation …………………………………………………………………………
Installation ……………………………………………………………………….................
Shower Valve………………………………………………………………………………..
Adjustable Riser ………………………………………………………………………….
Rigid Riser …………………………………………………………………………………..
Operation ……………..........………………………………………………………………….
Commissioning ……………………………....………………………………………………
Maintenance …………………………….....………………………………………………….
In-Service Testing ……………………………..……………………..........................
Troubleshooting ……………………………………........………………………………….
Guarantee ……………………………………............……………………………………….
3
4
5
6
7
8-9
10-13
14-15
16
17-22
17-18
19-20
21-22
23
24
25-26
27 -28
29-30
31
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•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 product safely you must
employ the services of an experienced qualified plumber.
•Do not use if the showerhead or shower hose has been damaged or is blocked.
•Do not crush or kink the shower hose, this could damage the hose and cause leaks.
•Remove all packaging and check the components for damage before starting
installation.
•Warning: Before starting any installation please consider the following: Prior to
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
•The fitting of isolating valves is required as close as is practical to the supply inlet
feeds of the thermostatic mixing valve.
•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 product must not be modified in any way as this will invalidate the guarantee.
Important Safety Information
3
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General Information
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This product has been tested to the TMV2 scheme which complies with the BS
EN 1287:1999 (LP) and BS 1111:1999 (HP) thermostatic mixing valve standards.
It also 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.
Important: Nominally equal (balanced) inlet supply pressures are
recommended for optimum performance with mixer showers.
This shower valve should be installed in compliance with the Water Regulations.
If in doubt, contact a registered plumber or your Local Water Authority or the
Secretary of The Institute of Plumbing, address as follows;-
The Institute of Plumbing,
64 Station Lane,
Hornchurch,
Essex, RM12 6NB
Tel:[phone]
Guide to designations
HP High Pressure
LP Low Pressure
S Shower

Product Features
On/Off and Temperature Control
Turn the control anti-clockwise
to turn the shower on and increase
the temperature.
Turn the control clockwise to
decrease the temperature and
to turn the shower off.
5
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KN2 SHXAR C shown

Specifications
Inlet Connections: 15mm compression, with adjustable centres.
Operating Pressure Range: Min: 0.1 bar –Max: 5.0 bar –Maximum recommended
imbalance between hot and cold supply should not exceed a ratio of 5:1.
Maximum Static Pressure: 10.0 bar
Maximum Outlet Temperature: Factory pre-set to 41ºC (can be re-set to suit site
conditions).
Supply Requirements:
Minimum cold water supply temperature: 5ºC.
Maximum cold water supply temperature: 25ºC.
Maximum hot water supply temperature: 80ºC.
(a maximum hot water supply temperature of 60 –65ºC is recommended for ablutionary
purposes).
Note: The inlet hot water temperature must be at least 10ºC above the required blend
temperature (e.g. shower temperature 43ºC: minimum hot supply 53ºC.
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Dimensions (mm’s)
7
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110-155
510
600
150
65
975
345
800
114
114
34
34
114

Pack Contents –KN2 SHXAR C
1
2
3
4
5
6
7
8
9
10
11
1Shower Valve
2Covers x2
3Filters x2 (pre-fitted)
4Green flow regulator (Pre-fitted)
5Yellow flow regulator (Pre-fitted)
6Backplate fixings x2
7Riser rail fixings x4
8Showerhead (single function)
9Sealing washers x2
10 Shower hose
11 Riser rail
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Pack Contents –KN2 SHXRR C
1
89
10
12 13
14
1Shower Valve
2Covers x2
3Filters x2 (Pre-fitted)
4Green flow regulator (Pre-fitted)
5Yellow flow regulator (Pre-fitted)
6Backplate fixings x2
7Shower rose
8Shower arm
9Shower arm fixings x2
10 Sealing washer
11 Rose swivel joint
12 Top rail
13 Bottom rail
14 Rail connector
9
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2
3
4
5
6
7
11

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 6.
•Instantaneous Water Heater
(combination boiler)
•Unvented System
•Pumped System
Gravity Fed Hot and Cold
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 1 metre.
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 on page 11.
Flushing Pipework
Important: Before connecting the
shower valve (see Installation on pages 17-
22), supply pipework must be flushed to
clear debris before connecting the shower
valve. Debris will reduce the performance
and life of the shower.
Gravity Fed Hot and Mains Cold
Cold mains supply Cold mains supply
1m min
1m
min
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Installation Requirements
Instantaneous Water Heater Unvented System
Pumped System Pumped System (with Essex flange)
Key: Isolating Reducing Shower Pump Essex
Valve Valve Valve Flange
Cold mains supply Cold mains supply
Cold mains supply Cold mains supply
1m min 1m min
If less
than 1m
see note.
50mm
11
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Installation Requirements
These fittings need 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 a or 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 fitting
(other than 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 1/2
in 20mm
2. Exceeding 1/2 in
but not exceeding
3/4 in
25mm
3. Exceeding 3/4 in 70mm
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Installation Requirements
13
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Conditions of use for Type 2 (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 1.0
Hot Supply Temperature (ºC) 55 to 65 55 to 65
Cold Supply Temperature (ºC) Equal to or less than 25 Equal to or less than 25
Code Operating Pressure Application
HP-SE High Pressure Shower
LP-S Low Pressure Shower
This valve has been approved for use in the following
designations;
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.
Note: Valves operating outside these conditions cannot
be guaranteed by the Scheme to operate as Type 2
valves.
The valves designation of use, LP if testes against BS EN
1287, HP if tested against BS EN 1111 and HP & LP if
tested against both standards.
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
.
Minimum supply pressure for LP Tub application is 0.2
bar.
Recommended Outlet temperatures
We recommend the following set maximum mixed water
outlet temperatures for use in all premises:
41ºC for showers;
The maximum mixed water temperature can be 2ºC
above the recommended maximum set outlet
temperatures.
Note: 46ºC 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
37.5ºC as a comfortable bathing temperature for
children. In premises covered by the Care Standards
Act 2000, the maximum mixed water outlet
temperature is 43ºC.
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.
Note: The frequency of In-Service tests –1 year max.
The fitting of isolation valves is required as close as is
practical to the water supply inlets of the thermostatic
mixing valve.
The fitting of strainers is recommended as close as is
practicable to the water supply inlets of the
thermostatic mixing valve.

Flow Regulators
Selecting Flow Regulators
Supply System Flow Regulator
Cold Supply Hot Supply Cold Hot Comments
0.1 to 1.0bar 0.1 to 1.0bar No No Maximum pressure
loss ratio 5:1
1to 5 bar
or pumped
1to 5 bar or
pumped
Green
(7 litre)
Yellow
(5 litre)
♦Use arrangement
for pumped system
Mains
1.0 –10 bar
Gravity
0.1 to 0.5 bar
Green
(7 litre)No
Gravity
Above 0.5 bar
Green
(7 litre)
Yellow
(5 litre)
Unvented Mains
/ Mains
Pressurised
Instantaneous
Water Gas
Heater
Green
(7 litre)
* Yellow
(5 litre)
**Instantaneous
Water Electric
Heater
Yellow
(5 litre) No
Any vented
(open outlet)
Heater Gas /
Electric, e.g.
Electric Shower
Do not use with a mixer valve –This would be
extremely dangerous
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♦Regulators can be fitted if water economy is required.
*Yellow (5 litre) regulator may not be necessary on some gas water heaters.
** Important: It is a requirement of Instantaneous Electric Heaters that a stable flow
of water passes through the heater. This requirement can be satisfied by using a ‘flow
stabiliser’ fitted prior to the heater and should be adjusted to give a temperature of
between 45 –50°C from the heater.
Flow regulators are factory fitted.
Study the table on the previous page and
decide which flow regulators are
required for your particular situation.
Unscrew both inlet elbows from the valve
body and remove flow regulator/s using
long nose pliers from the non return valve
retainer.
Screw inlet elbows back into the valve body.
Flow Regulators
Inlet
elbow
Compression
nut
Filter
Flow Regulator
Olive
Non Return
Valve
Non Return Valve
Retainer
Non Return Valve
Retainer
15
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Prior to Installation
This shower valve is supplied with two
small and two large elbows to give varying
centres.
Note: The shower valve is supplied
with the small elbows fitted.
Choose elbow configuration to suit
Inlet centres
2 x small elbows –110-130 centres
2 x large elbows –136-155
1 small elbow / 1 large elbow –125-145
All measurements are in millimetres.
To remove the elbows
To remove the elbows from the body
unscrew anti-clockwise.
To fit large elbows
Screw the large elbows clockwise
into the valve body.
Important: The elbows must have
at least two complete turns in the
valve body.
Unscrew small
elbow anti-clockwise
Screw in large
elbow clockwise
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Installation –Shower Valve
Before Installation
Flush through the pipework to ensure
removal of debris. Turn off the mains
water supply and close any isolating
valves.
1. Inlet positions
The shower valve has three inlet positions
–top, bottom and rear. Rotate the inlet
elbows as required.
With the elbows screwed fully against the
valve body it can be unscrewed a
maximum of 1.5 turns to allow for lateral
tolerance.
Sufficient 15mm diameter supply pipes
should protrude through the finished wall
surface to fit fully into the shower valve
elbows.
2. Attach backplate to wall
Loosen the ‘backplate’ grub screw on the
Back of the valve using the hexagonal key.
Use the backplate as a template 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 backplate to
the wall using the screws provided.
110 -155mm
Hot Cold
42.5mm Backplate
fixing holes
Important: Water supplies to the mixer
must be with hot on the left and cold on
the right when viewed from the front.
17
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Hot
supply
Cold
supply
3. Attach shower valve
Place the shrouds over the water supply
pipes. Insert the 15mm hot and cold water
supply pipes into the inlet connections and
tighten the nuts. Ensure the olives and
filter are in place.
Secure the shower valve to the backplate
by tightening the backplate grub screw.
Installation Shower Valve cont.
Re-attach the shower valve to the
backplate by tightening the grub screw.
Note: The shower valve inlet
positions are shown at the rear as an
example.
See pages 19-22 for installation of
adjustable riser and shower hose.
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1. Mark the position
Position the assembled riser rail onto the wall,
bearing in mind the highest maximum position
required for the handset. With the riser rail
vertical, mark the position of the wall brackets
onto the wall surface.
2. Attach wall bracket fixings
Remove the wall brackets from the rail and
then remove the fixings from the wall brackets.
Position the fixing bracket 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 fixing brackets to the wall
sing the screws.
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
installation.
Installation –Adjustable Riser
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.
Handset
Holder
Wall bracket
Wall bracket
Wall bracket
fixing
Hose Retainer
19
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Installation –Adjustable Riser cont.
Bottom wall
Bracket
3. Insert riser rail
Push the riser rail down through the bottom
wall bracket.
Push the hose retainer and handset holder
down onto the riser, ensuring they are the
correct way up -as shown opposite.
Then push the riser rail up through the top
wall bracket.
4. Fit top wall bracket
Push the top wall bracket down onto the
riser rail.
5. Fit the riser to the wall
Fit the top and bottom wall brackets over
the bracket fixings secured to the wall.
Tighten the grub screw on the top and
bottom wall brackets with a suitable
hexagonal key to secure the riser rail
in position.
6. Fit shower hose
Fit the shower hose to the shower valve
outlet ensuring the sealing washer is fitted
between.
Screw the shower hose onto the handset
ensuring the sealing washer is fitted
between.
Place the handset into the handset holder.
Top wall
Bracket
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