Triton ELINA User manual

2180687O - July 2021
86002260
IMPORTANT SAFETY ADVICE
The shower head and hose supplied with
this product are a safety critical part of your
shower. Failure to use genuine Triton parts may
cause injury and invalidate your guarantee.
FOR YOUR SERVICE REFERENCE
NOTE DOWN THE PRODUCT CODE BELOW
(FROM THE FRONT OR TOP OF THE BOX)
ALTERNATIVELY REGISTER BY TEL: [phone]
INSTALLATION AND OPERATING INSTRUCTIONS
Please read this book thoroughly and familiarise yourself with all instructions before commencing
installation and keep it for future reference.
The mixer shower installation MUST be carried out by a suitably qualied person, in the sequence
of this instruction book.
ELINA
Sequential built-in
thermostatic mixer
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Thermostatic mixer valve
To check the product suitability for commercial and multiple installations, please contact Triton’s
specification advisory service before installation.
Telephone:
E mail:
024 7637 2222
[email protected]
CONTENTS Page
MAIN COMPONENTS ............................................................................. 1
INTRODUCTION......................................................................................2
SITE REQUIREMENTS ...............................................................................2
SAFETY WARNINGS .................................................................................2
PLUMBING REQUIREMENTS ....................................................................3
WATER SYSTEM REQUIREMENTS..............................................................3
TYPICAL COMMERCIAL INSTALLATIONS.................................................. 4
INSTALLATION.........................................................................................5
SITING OF THE SHOWER ...............................................................5
SUPPLY PIPEWORK ......................................................................... 5
BUILT IN FITTING........................................................................... 6
INSTALLATION IN A SOLID WALL...................................................6
INSTALLATION IN A HOLLOW WALL..............................................7
INSTALLATION IN A PANEL OR CUBICLE........................................ 7
FITTING THE SHOWER................................................................... 8
FITTING THE BULKHEAD OR FIXED HEAD PIPEWORK.....................9
LEAK TESTING ...............................................................................9
BULKHEAD ASSEMBLY.................................................................. 10
FLOW REGULATION..................................................................... 10
ANTI-SCALD PROTECTION ..........................................................11
FITTING THE COVERPLATE........................................................... 11
COMMISSIONING (TYPE3) ..........................................................12
ADJUSTING THE MAXIMUM TEMPERATURE SETTING ............................ 13
FITING THE HANDLE ............................................................................. 13
OPERATING THE SHOWER .....................................................................14
APPROVALS ........................................................................................... 15
PRODUCT FLOW RATES ......................................................................... 15
DIMENSIONS ........................................................................................16
IN SERVICE TESTING/FREQUENCY OF TESTING ..............................17 - 18
TEST RECORD........................................................................................ 19
CLEANING.............................................................................................20
FAULT FINDING..............................................................................21 - 22
GUARANTEE, SERVICE POLICY, ETC. ...........................................rear cover
INSTALLERS PLEASE NOTE THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER

Thermostatic mixer valve
1
6. Mounting plate
7. Outlet bulkhead
8. Nutted long thread connector
1
2
3
6
5
7
8
4
Fig.1
Ref. Description
1. Mixer shower body
2. Blanking plug
3. Flow regulator X2
4. Inlet nut and Olive X2
5. Cover plate
MAIN COMPONENTS

Thermostatic mixer valve
2
Introduction
INTRODUCTION
This book contains all the necessary tting and
operating instructions for your Triton mixer
shower. Please read them carefully and read
through the whole of this book before beginning
your installation.
The shower installation must be carried out by
a suitably competent person and in sequence of
this instruction book.
Care taken during the installation will give a long
and trouble free life from your mixer shower.
SITE REQUIREMENTS
The installation must be in accordance with
Water Regulations and Bylaws.
Water Pressure Requirements
Designation: HP-S
Running water pressure:
Gravity fed (LP) - 0.2 bar min.
1.0 bar max.
Mains fed (HP) - 1.0 bar min.
5.0 bar max.
Maximum static water pressure:
Gravity and mains - 10 bar
This mixer shower is designed for use with
traditional low pressure gravity water systems,
using a cold water cistern and hot water cylinder
as well as for the higher pressure systems found
in the UK up to a maximum of 5 bar running
pressure.
For effective operation of the internal seals, the
maximum static pressure must not be exceeded.
If a water supply is fed by gravity then the
supply pressure should be veried to ensure the
conditions of use are appropriate for the valve.
NOTE: TYPE 3 approval applicable only to HP
systems.
Pressure Reducing Valve
On sites where the running pressure is above 5
bar, the use of a suitably sized pressure reducing
valve tted in the cold mains supply pipework
can provide nominally equal pressures at the
mixer shower.
Water Minimum Flow Rate
For best performance within the specied running
pressure range a minimum ow of 8 litres per
minute should be available to both inlets.
Water Temperature Requirements
Maximum hot water temperature: = 80°C
TYPE3 Recommended maximum: = 65°C
Minimum hot water temperature: = 55°C
Maximum cold water temperature: = 20°C
Minimum cold water temperature: = 5°C
Minimum temperature differential: = 10°C
The mixer shower MUST NOT be subjected to
water temperatures above 80°C.
A stored water temperature of 60°C is considered
sufcient to meet all normal requirements and will
minimise the effects of scale in hard water areas.
Valves operating outside these conditions cannot
be guaranteed by the scheme to operate as type
3 valves.
Water Temperature Adjustment and
Thermal Safety
The mixed water temperature can be adjusted
from cold through to a top limit which must
be preset during installation with full anti-scald
protection throughout the range (35°C to 40°C)
providing the hot water temperature at the inlet
remains 10°C above the outlet temperature.
Should there be a loss of ow to either incoming
supply then water from the shower will stop or
be reduced until both supplies are restored.
SAFETY WARNINGS
a. DO NOT choose a position where the mixer
shower could become frozen.
b. DO NOT connect this mixer shower to any
form of tap or tting not recommended by
the manufacturer.
c. DO NOT allow the inlet pressure or ow
rates to operate outside the guidelines laid
out in Site Requirements.
d. DO NOT connect the mixer shower to a
gravity hot supply and a mains cold supply or
vice versa.

Thermostatic mixer valve
3
PLUMBING REQUIREMENTS
DO NOT use jointing compounds on any pipe
ttings for the installation.
DO NOT solder ttings near the mixer shower
as heat can transfer along the pipework and
damage the mixer valve.
IMPORTANT:
• The layout and sizing of pipework MUST
be such that nominally equal inlet supply
pressures are achieved and the effects of
other draw-offs are minimised.
• The pipework should be installed such
that other taps and appliances being
operated elsewhere on the premises do not
signicantly affect the ow
• When connecting pipework avoid using tight
90° elbows; swept or formed bends will give
the best performance.
• The hot water pipe entry must be made to
the left-hand side inlet, marked HOT, ‘H’ or
with a red/orange label.
• Suitable isolating valves (complying with
Water Regulations and Bylaws) must be tted
on the hot and cold water supplies to the
shower as an independent means of isolating
the water supplies should maintenance or
servicing be necessary; position as close as
is practicable to the water supply inlets of
the mixer shower. If this isolator is tted in a
loft space, the loft must have a xed access
ladder and be boarded, with appropriate
lighting from the access point to the isolator.
• It is preferable to ush the pipework to clear
the system of debris and check for leaks
before connecting to the mixer.
• The mixer inlets contain removable lters
that may become blocked if debris is not
ushed through before tting.
Commercial Applications
• Triton recommends for all commercial
applications that, easily accessible, in-line
lters are used to aid maintenance.
Hard Water Areas
a. If it is intended to operate the shower
in areas of hard water (above 200-ppm
temporary hardness), a scale inhibitor may
have to be tted. For advice on the Triton
scale inhibitor, please contact Customer
Experience.
b. For best performance the shower head MUST be
regularly cleaned to remove scale and debris.
WATER SYSTEM REQUIREMENTS
This mixer shower is suitable for:
• Gravity water systems
• Pumped gravity systems
• Fully modulating type combination boilers
• Multi-point hot water heaters
• Thermal storage
• Unvented systems
When installing this mixer shower with a
combination or multi-point boiler, it may be
necessary to install ow regulation.
Check that the appliance is capable of delivering
hot water at a minimum switch-on ow rate
of 3 litres per minute. At ow rates between 3
and 8 litres per minute, the appliance must be
capable of raising the water temperature to 52°C
minimum.
Water temperature at the inlet of the mixer valve
must remain relatively constant when ow rate
adjustments are made - refer to the appliance
operating manual to conrm compatibility with
this mixer shower.
Where thermal store systems and instantaneous
gas water heaters are used, if excessive draw-off
takes place the appliance may not be able to
maintain an adequate output temperature. This
could result in the shower temperature becoming
noticeably cooler.
Flow regulators can be tted with high-pressure
water systems to reduce ow rate and assist
economy.
The hot supply temperature MUST remain a
minimum of 10°C hotter than the required blend
temperature for optimum performance.

Thermostatic mixer valve
4
Pump
Cold water cistern
Vent
Hot
water
cylinder
>50°C
Drain at the lowest point
Drain
Hot water return
Hot water
Cold water to taps
60 2.5°C
Cold feed to Calorifier
<20°C
TYPICAL COMMERCIAL INSTALLATIONS
Commercial Gravity Fed Systems
(g.2)
The mixer shower MUST be fed from a cold
water cistern and hot water cylinder providing
nominally equal pressures. There must be a
minimum of one metre head of water.
The minimum head distance is measured from
the base of the cold water cistern to top of the
shower head.
Commercial Unvented Mains Pressure
Systems (g.3)
The mixer shower can be installed with an
unvented, stored hot water cylinder.
For systems with no cold water take off after the
appliance reducing valve, it will be necessary to
t an additional drop tight pressure reducing
valve when the mains pressure is over 5 bar. The
drop tight pressure reducing valve must be set at
the same value as the unvented package pressure
reducing valve.
NOTE: An additional expansion vessel may be
required if a second pressure reducing valve is
installed. This does not apply to packages with a
cold take off after the pressure reducing valve to
the cylinder.
TO TAPS
TO TAPS
PRESSURE
REDUCING
VALVE
CHECK
VALVE
E.R.V.
T.R.V.
PRESSURISED
HOT WATER
*Fig.3
*Fig.2
*Diagrammatic view – not to scale.
For illustration purpsoes only.
*Diagrammatic view – not to scale.
For illustration purpsoes only.

Thermostatic mixer valve
5
INSTALLATION
Preparing the Shower
Check the contents to make sure all parts are
present.
Before starting the installation, make sure all the
openings on the valve are carefully covered to
stop ingress of any debris etc, while routing the
supply pipework.
The mixer shower is suitable for built-in
installation in a solid wall, a stud partition wall,
dry lined wall or xing to a shower cubicle or
panel.
Siting of the Shower and Accessories
Refer to g.4 for correct siting of the shower.
The mixer shower should be positioned as
detailed, with all controls within comfortable
reach of the user.
The accessories (shower head, riser rail and/or
xed shower head) can be positioned above or
to either side of the shower (g.4).
Supply Pipework
Complete the pipework to the shower area
having decided on the position of the shower
and direction of pipe entry, for example rising,
falling or rear entry.
The hot and cold water pipes should not
be permanently attached to the wall within
one metre of the valve, before installation is
complete, to allow for nal adjustment of the
valve position.
For rear entry supplies, using a spirit level, mark
the route of incoming hot and cold water supply
pipes at a distance of approximately 150mm
between centres (g.5).
Height of
showerhead
and shower
to suit user’s
requirement.
Bulkhead
(supplied)
Outlet to
bulkhead
Approximately
150mm
Fig.5
*Fig.4 *Diagrammatic view – not to scale.
For illustration purpsoes only.

Thermostatic mixer valve
6
Water filter
with seal
Elbow
BUILT-IN FITTING
The following are typical thicknesses and are
given as a guide only:
Tile 6 − 10mm
Adhesive 2 − 3mm
Plasterboard 9.5 − 12.5mm
Plaster nish 2 − 3mm
Maximum tile thickness to be 10mm.
When installing into a stud partition or other
hollow wall structure, the installer may wish to
consider building rear supports or other options
for tting the mounting plate. Such options are
beyond the scope of this guide.
Use the supplied cover plate or tiling shroud as a
template when cutting the opening for installing
the shower into a solid wall, stud partition or
hollow wall structure.
The building-in depth for the mounting plate is
given in g 6 from the plaster nish but this is
dependent upon tile and adhesive thicknesses.
The inlet elbows allow for either rising, falling
or rear entry hot and cold water supplies. The
elbows have ‘O’ ring seals (g.7) to the body
and do not require PTFE tape or other means of
sealing. The lter MUST be tted between the
elbow and nut connector otherwise the elbow
will leak.
NOTE: To ease future requirements for cleaning
and maintenance of the unit, it is advisable to
route both the incoming and outgoing pipework
from the same direction. Access to the integral
strainers will also be improved with this layout.
Installation in a Solid Wall
Decide on the shower position and determine
whether the hot and cold water supplies will
enter the shower from top (falling) or bottom
(rising) or rear.
As a guide for the size of hole, it should be large
enough to accept the valve complete with the
inlet and outlet ttings and also allow access for
connection to the pipework.
Remove the plaster and brickwork to the required
depth and chase out any additional areas of the
wall to give access to the pipework to and from
the valve plus any outlet ttings.
Plaster finish
Tile
Adhesive
Trimplate
55mm
minimum
Fig.7
Fig.6

Thermostatic mixer valve
7
NOTE: The valve body requires a deeper recess
than the inlet and outlet ttings. The outlet
pipework must end in a suitable female thread
parallel 15mm x ½” BSP tting (not supplied).
Offer the valve body up to the wall and mark the
xing holes. Remove the valve, drill and plug the
wall. Route the pipework to valve body position.
Installation in a Hollow Wall
Decide on the shower position and determine
whether the hot and cold water supplies will
enter the shower from the top (falling) or bottom
(rising) or rear (g.8).
When installing into a stud partition or other
hollow wall structures, the installer will need
to consider fabricating rear supports or other
options. Such options are beyond the scope of
this guide.
Mark the route of the incoming and outgoing
pipework.
Take out the plasterboard - use the cover plate or
tiling shroud as a template. Offer the valve body
up to the fabrication and mark the two xing
holes.
Remove the valve and drill the holes. Route the
pipework to the valve position.
Installation in a Panel or Cubicle
When installing into a panel or cubicle structure,
the installer will need to consider fabricating
rear supports or other options. Such options are
beyond the scope of this guide.
Typically, there should be at least 65mm space
from the surface of the panel to the rear of the
valve body.
IMPORTANT: Access to the rear of the
valve must be available.
The controls require one hole to be cut out of
the panel or cubicle. Use the cover plate as a
template to mark the hole positions then extend
further to allow access for the lters.
Route the pipework to valve position.
Fig.8

Thermostatic mixer valve
8
FITTING THE SHOWER
Mark the position of the four locating screws
for the mounting plate, although if installing to
a solid brick wall, using two diagonal holes will
usually be enough.
Drill and plug the holes using the wall plugs
provided. The wall plugs provided are suitable
for most brick walls — use an appropriate
masonry drill, but if the wall is plasterboard or a
soft building block, use special wall plugs and a
suitable drill bit.
Fit the mounting plate using the screws supplied
(g.9).
The inlet elbows allow for either rising, falling
or rear entry hot and cold water supplies. The
elbows have ‘O’ ring seals (g.7) to the body
and do not require PTFE tape or other means of
sealing.
IMPORTANT: Make sure that all supply
pipework has been ushed through before
tting the mixer (g.10).
Connect the hot water supply to the inlet marked
HOT, ‘H’ or red/orange label and connect the
cold water supply to the inlet marked
COLD, ‘C’ or blue label (g.11).
Tighten all compression ttings.
Tighten all the grub screws to secure the mixer to
mounting plate.
Water filter
with seal
Elbow
Hot entry port
Fig.11
Fig.10
Fig.9

Thermostatic mixer valve
9
Appropriate
fitting
8mm - 13mm
Finished surface
Outlet Adapter and Plug
The outlet adapter and plug can be repositioned
dependant on the outlet required - top or
bottom. The adapter is suitable for a 15mm rigid
pipe connection. The rubber seal MUST be tted
between the outlet adaptor and nut connector
(g.12).
FITTING THE BULKHEAD OR
FIXED HEAD PIPEWORK
Complete the outlet pipework ending in a 15mm
x ½” BSP female thread elbow (g.13).
Note: This tting is not supplied as variations in
installations require the selection of a suitable
solder or compression tting.
To install the xed shower head please refer to
the tting instruction supplied with it.
To install the bulkhead screw the supplied male
connector into the female tting (g.14) using
PTFE tape to give a watertight joint.
Note: The male-thread connector supplied has
a shoulder. If tting into a ush wall, make an
additional 8mm allowance for this shoulder at
the nished surface. The connector can be cut to
size if required.
The threaded connector should protrude from
the nished wall surface between 8mm and 13mm.
LEAK TESTING
Direct the outlet of the mixer to waste. Open the
isolating valves to the shower and check for leaks.
Remedy any leaks found.
Make good the wall and complete the tiling.
This product is supplied with a tiling shroud to
prevent damage to the product.
If the tiles are accurately cut, then the faceplate
will seal around the hole in the tiles and the
valve unit will be able to be removed from the
wall without the need to break any tiles.
Make sure the grout lines around the valve are
ush with the tiles in order to provide a smooth
sealing surface for the coverplate.
Rubber seal
Outlet adapter
Fig.14
Fig.13
Fig.12

Thermostatic mixer valve
10
BULKHEAD ASSEMBLY
Screw the bulkhead elbow to the bulkhead body
with the three screws supplied.
Screw the completed assembly onto the
threaded connector temporarily to mark the
position of the two xing holes for securing the
bulkhead to the wall.
NOTE: If screw thread protrudes too far out of
the wall, it can be cut to the correct length using
a hacksaw.
Unscrew and remove the bulkhead assembly.
Check the location of the pipe in the wall before
drilling.
Drill and plug the holes using the wall plugs
supplied. The wall plugs provided are suitable for
most brick walls — use an appropriate masonry
drill, but if the wall is plasterboard or soft
building block, you must use special wall plugs
and a suitable drill bit.
If tting to a hollow wall structure, it may be
preferable to secure the bulkhead by applying a
bead of silicon seal to the back of the bulkhead.
Apply PTFE tape to the threaded connector.
Screw the bulkhead assembly onto the threaded
connector until tight to the wall and the two
xing holes are aligned. Secure to the wall with
the two screws supplied (g.15).
Finish by clipping the cover onto the bulkhead,
making sure the protruding legs locate in the
bulkhead body.
Flow Regulation
Flow regulators are supplied for use with high-
pressure water systems and may be tted with
any of the systems listed to reduce ow rate and
assist economy.
To t the ow regulators, unscrew the elbows,
place the ow regulator correctly into the inlet
connectors, followed by the retaining washers.
Reassemble the elbows (g.16).
Flow regulator
Fig.15
Fig.16

Thermostatic mixer valve
11
ANTI-SCALD PROTECTION
It is important that the mixer valve is tested
regularly to prevent the risk of scalding and
guarantee user safety. This can be carried out as
follows: with the mixer blend temperature set
at 38°C isolate the cold water supply. The outlet
ow rate will reduce to a safe level.
Fitting the Coverplate
Fit the coverplate over the valve body and slide
tight to the wall.
Make sure the seal in the opening stays in place
as it slides over the valve body. A smear of liquid
soap on the seal will ease this procedure.
The coverplate incorporates a silicon sponge
backing that seals against a smooth wall.
Once the coverplate has been tted, the
adjustment lever will need to be tted into the
body of the mixer and tightened (g.17).
Fig.17

Thermostatic mixer valve
12
COMMISSIONING (TYPE 3)
The following conforms to Department of Health (doH), Health Technical
Memorandum HTM 04-01: Supplement Performance specication D 08:
thermostatic mixing valves (healthcare premises) for when the mixer has been installed
in healthcare premises.
Important: Make sure that all supply pipework has been ushed through before commissioning.
The maximum set temperature for showering should not exceed 41°C.
Start the water ow by rotating the ow control.
Make sure that both the hot and cold water supplies are fully open and at (or near to) their
design temperature and pressures, and are within the requirements as stated.
Make sure the temperature control is at the maximum temperature setting.
Allow the shower to run at the maximum temperature setting until the water temperature has
stabilised. Rotate the temperature control until your desired maximum showering temperature is
reached.
The mixer has a temperature stop to prevent accidental rotation to higher
temperatures. This is adjustable to provide a maximum temperature of 41°C
and should be checked on site to guarantee user safety.
After setting the maximum temperature, turn the shower on and off several times and check the
maximum setting is correct. Record the commissioning data on the maintenance record at the rear
of this book in order for the in-service performance of the mixer valve to be assessed.
Finally, check the thermal shut off facility of the valve by performing a thermal shut off test. Shut
off the cold supply.
The ow from the shower should stop immediately or reduce to a trickle in which case the water
temperature should be less than 43°C.
In either case there is no risk of scalding.
If, however, the temperature is above 43°C then it is likely there is contamination in the valve
stopping it from shutting off the hot supply. In this case refer to the maintenance section or
contact Customer Experience.
In domestic installations where D 08 specication is not required, the maximum
temperature setting should not exceed 46°C.
Temperature Adjustment Range
The mixed water temperature can be adjusted from cold through to a top limit (which can be
pre-set during installation – factory set at approximately 38°C) with full anti-scald protection
throughout the range.

Thermostatic mixer valve
13
ADJUSTING THE MAXIMUM
TEMPERATURE SETTING
and tting the lever
The mixer shower is supplied with the ow and
temperature knob tted and the maximum
temperature stop factory set to 38°C (this can be
adjusted during installation).
The lever is supplied loose in the box.
Using a suitable allen key, loosen the retaining
screw and pull off the temperature control knob
(g.18).
Using an appropriate sized spanner, slightly
loosen the end of the thermostatic cartridge.
Insert an appropriately sized Allen key into the
end of the cartridge and turn in the directions
shown in g.19 to adjust the temperature.
Once the desired temperature is obtained,
re-tighten the end of the thermostatic cartridge.
Ret the temperature control housing, making
sure the temperature control lever hole is aligned
at 6 o'clock.
Secure in place with the retaining grub screw
and t the lever.
When you are satised with the temperature turn
the ow control off.
Retaining screw
‘Hex’ end of lever
Undo
Decrease MAX temperature
Increase MAX temperature
Fig.19
Fig.18
Note: If tamper proof lever tting is required,
tighten the lever into the control using a suitable Allen
key placed into the recessed hex end of the lever.
DO NOT OVERTIGHTEN THE LEVER.

Thermostatic mixer valve
14
MAXIMUM
temperature
stop position
OFF position
H
O
T
T
E
R
OPERATING THE SHOWER (g.20)
To start the shower, turn the on/off temperature
control anti-clockwise.
To adjust the showering temperature rotate the
temperature control clockwise for cooler and
anti-clockwise for hotter.
CAUTION: Exposed metal surfaces may
become hot during use.
Fig.20

Thermostatic mixer valve
15
APPROVALS
This mixer valve has been designed to comply with the requirements of: D 08
KIWA
MARKING
The unique reference for this product is: 86002260
This can be found laser marked onto the body of the mixer valve.
PRODUCT FLOW RATES - For guidance only
Flow Rate (l/m) 7.0 10.0 12.5 15.0 17.0 25.5 38.0 47.5 51.5 63.0
Pressure (bar) 0.1 0.2 0.3 0.4 0.5 1.0 2.0 3.0 4.0 5.0
Conditions for test
Inlet temperatures comply with EN1111 requirements.
Outlet temperature 38C.
Flow control fully open.
Open outlet - No hose or shower head connected.

Thermostatic mixer valve
16
ø165mm
150mm
ø68mm
32.5mm 20 - 52mm
132.5mm
DIMENSIONS
All dimensions listed in this tting book regarding the product and installation are approximate.

Thermostatic mixer valve
17
IN-SERVICE TESTING
Maintenance of the unit is required to give
continued performance after installation and that
it continues to provide scald prevention.
NOTE: A thermostatic mixing valve in need of
maintenance can be undetectable in normal
use and only becomes apparent when a
disruption occurs in the hot or cold water supply
temperatures or pressures.
Purpose
The purpose of in-service tests is to regularly
monitor and record the performance of the
thermostatic mixing valve. Deterioration in
performance can indicate the need for service
work on the valve and/or the water supplies.
Procedure
Using the same measuring equipment or
equipment to the same specication as used
in the commissioning of the valve, adjust the
temperature of the mixed water in accordance
with the manufacturer’s instructions and the
requirement of the application. Carry out the
following sequence:
a) Record the temperature of the hot and cold
water supplies.
b) Record the temperature of the mixed water
at the largest draw-off ow rate.
c) Record the temperature of the mixed water
at a smaller draw-off ow rate, which shall be
measured.
If the mixed water temperature has changed
signicantly from the previous test results
(e.g.> 1 K) 5), record the change and before
re-adjusting the mixed water temperature check
that:
a) any in-line or integral strainers are clean,
b) any in-line or integral check valves or other
anti-back siphonage devices are in good
working order,
c) any isolating valves are fully open.
With an acceptable mixed water temperature,
complete the following procedure:
a) Record the temperature of the hot and cold
water supplies.
b) Record the temperature of the mixed water
at the largest draw-off ow rate.
c) Record the temperature of the mixed water
at a smaller draw-off ow rate, which shall be
measured.
d) Isolate the cold water supply to the
mixing valve and monitor the mixed water
temperature.
e) Record the maximum temperature achieved
as a result of (d) and the nal stabilised
temperature.
f) Record the equipment, thermometer etc.
used for the measurements.
If at step (e) the nal mixed water temperature
is greater than the values in Table 17 and /
or the maximum temperature exceeds the
corresponding value from the previous results by
more than about 2 K, the need for service work
is indicated
NOTE: In-service tests should be carried out
with a frequency, which identies a need
for service work before an unsafe water
temperature can result. In the absence of any
other instruction or guidance, the procedure
described in Annex F of D 08 may be used
Annex F of D 08 (informative)

Thermostatic mixer valve
18
FREQUENCY OF IN-SERVICE TESTS
General
In the absence of any other instruction or
guidance on the means of determining the
appropriate frequency of in-service testing, the
following procedure may be used:
a) 6 to 8 weeks after commissioning carry out
the tests detailed in:
In-Service Tests
b) 12 to 15 weeks after commissioning carry
out the tests detailed in:
In-Service Tests
Depending on the results of the above tests,
several possibilities exist:
a) If no signicant changes (e.g. ≤ 1 K) in
mixed water temperatures are recorded
between commissioning and 6 to 8 week
testing, or between commissioning and
12-15 week testing the next in-service test
can be deferred to 24 to 28 weeks after
commissioning.
b) If small changes (e.g. 1 to 2 K) in mixed
water temperatures are recorded in only one
of these periods, necessitating adjustment of
the mixed water temperature, then the next
in-service test can be deferred to 24 to 28
weeks after commissioning.
c) If small changes (e.g. 1 to 2 K) in mixed
water temperatures are recorded in both of
these periods, necessitating adjustment of
the mixed water temperature, then the next
in-service test should be carried out at 18 to
21 weeks after commissioning.
d) If signicant changes (e.g. > 2 K) in mixed
water temperatures are recorded in either
of these periods, necessitating service work,
then the next in-service test should be carried
out at 18 to 21 weeks after commissioning.
The general principle to be observed after the
rst 2 or 3 in-service tests is that the intervals of
future tests should be set to those which previous
tests have shown can be achieved with no more
than a small change in mixed water temperature.
NOTE: A testing record page has been added to
the book for your use.