Triton HUMBER User manual

Installers please note these InstructIons are to be left wIth the user
2180596B January 2009
Installation
and
Operating
Instructions
HUMBER
Dual Control
Mixer shower
Fixed head

Dual control mixer
CONTENTS Page
Introduction ................................................................................... 1
Safety warnings .............................................................................. 1
Main components and pack contents............................................. 2
Site requirements ........................................................................... 3
Typical suitable installations......................................................... 4 −5
Temperature adjustment range....................................................... 6
Instantaneous water heaters appliance
capabilities...................................................................................... 6
Preparing the mixer valve............................................................... 7
Siting the shower ........................................................................... 7
Installation
General.............................................................................. 8 −9
Solid wall............................................................................. 10
Hollow wall.......................................................................... 11
Cubicle or panel .................................................................. 12
Connecting the supply pipes ......................................................... 13
Outlet adaptor............................................................................... 13
Fitting the fixed head .................................................................... 14
Using the tiling shroud .................................................................. 15
Fitting the faceplate and knobs ................................................. 15 −16
Commissioning.............................................................................. 17
Operating the shower.................................................................... 18
Adjusting the showerhead ............................................................. 18
Cleaning........................................................................................ 19
Maintenance ............................................................................. 20 −21
In-service testing ........................................................................... 21
Inspection and maintenance record............................................... 22
Spare parts ................................................................................ 23 −24
Fault finding .................................................................................. 25
Guarantee, service policy, etc. ..................................................rear cover
To check the product suitability for commercial and multiple installations, please contact Triton’s
specification advisory service before installation.
Telephone:
Facsimile:
E mail:
0844 980 0730
0844 980 0744
[email protected]

Dual control mixer
1
INTRODUCTION
This book contains all the necessary fitting
and operating instructions for your Unichrome
Humber dual control mixer shower. Please read
them carefully.
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 make sure
a long and trouble free life from the shower.
This thermostatic shower valve has been
independently tested and approved to all the
requirements of NHS Estates Model Engineering
Specification D08 Thermostatic Mixing
Valves (Healthcare Premises) to the following
designations and for the following applications:
HP-S Shower with supply pressures of
1 −5 Bar and unrestricted flow rate.
LP-S Shower with supply pressures of
0.2 −1 Bar and unrestricted flow rate.
For best performance within the specified
running pressure range a minimum flow of
8 litres per minute should be available to both
inlets.
The valve is suitable for fully modulating type
combination boilers and multi-point hot water
heaters. It is also suitable for thermal storage,
unvented systems and pumped gravity systems.
The valve unit can be fitted in any orientation.
For a wall mounted showerhead installation, the
plumbing will be simplified if the outlet is fitted
upwards.
The valve is supplied with an integral single
check valve and integral large area filter on each
inlet.
Inlet connections are by compression fittings for
15mm copper pipe.
This valve unit is supplied with a mounting
bracket to suit installation in a chased out cavity
in a solid wall, a stud partition wall, dry lined
wall or fixing to a shower cubicle or panel. It
is also supplied with an attached tiling shroud
which provides protection for the unit.
SAFETY WARNINGS
1 Layout and sizing of pipework MUST be
such that when other services are used,
pressures at the shower control inlets do not
fall below the recommended minimum.
2 DO NOT choose a position where the
shower could become frozen.
3 The outlet of this appliance MUST NOT be
connected to any form of tap or fitting not
recommended by the manufacturer.
4 The showerhead cartridge MUST be cleaned
regularly to remove scale and debris.
5 Conveniently situated isolating valves
in each inlet supply MUST be fitted as
an independent method of isolating the
shower should maintenance or servicing be
necessary.
6If it is intended to operate the shower in
areas of hard water it is advisable to fit a
scale inhibitor (see note below).
7If it is intended to operate the shower
outside the guidelines laid out in the
requirements then see note below.
Note: In the event of items 2, 6 and 7, contact
Customer Service for advice.
Replacement parts can be ordered from Triton
Customer Service. See ‘spare parts’ for details and part
numbers.
Due to continuous improvement and updating,
specification may be altered without prior notice.

Dual control mixer
2
Fig.1
1
2
3
45 76 8
9
11
10
12
14
MAIN COMPONENTS and PACK CONTENTS
Ref Description
8 Locknut
9 Screw and washer
10 Tiling shroud
11 Mounting bracket
12 Flat bracket – 2 off
13 Fixed head assembly
14 Tool and screw pack
Ref Description
1 Mixer valve body
2 Face plate
3 Temperature control knob
4 On/off control knob
5 Trim rings
6 Brass retaining rings
7 Finishing caps
13

Dual control mixer
3
SITE REQUIREMENTS
The installation must be in accordance with local
Water Company Regulations.
Minimum running water pressure: 0.2 bar.
Maximum running water pressure: 5 bar.
Maximum static water pressure: 10 bar.
For best performance within the specified running
pressure range a minimum flow of 8 litres per
minute should be available to both inlets.
While the mixer valve is operational (open
outlet), inlet pressures must not be capable of
exceeding 7 bar. For effective operation of the
internal seals, the maximum static pressure must
not be exceeded.
Note: On sites where the running pressure is
above 5 bar, the use of a suitably sized pressure
reducing valve fitted in the cold mains supply
pipework can provide nominally equal pressures
at the mixer valve.
For ideal performance of this shower both the
hot and cold water supplies to the shower valve
should be fed at nominally equal pressures.
The pipework should be installed such that the
flow is not significantly affected by other taps
and appliances being operated elsewhere on the
premises.
Note: Where thermal store/combi boilers or
multi-point heaters are used, if excessive draw-
offs take place the boiler may not be able to
maintain an adequate output temperature.
This could result in the shower temperature
becoming noticeably cooler.
Water temperature requirements
Maximum hot water temperature 80°C
Recommended maximum 65°C
Minimum hot water temperature 52°C
Maximum cold water temperature 20°C
BS 6700 recommends that 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 affects of
scale in hard water areas.
DO NOT use jointing compounds on the
pipework.

Dual control mixer
4
Service
valves
Balanced cold mains supply
Cold mains supply
Mixer
shower
Expansion
vessel
Pressure
reducing valve
Pressure
reducing valve
Stop tap
Unvented
hot water
storage unit
Safety devices
not shown
Fig.3 (diagrammatic view – not to scale)
TYPICAL SUITABLE INSTALLATIONS
a) Instantaneous gas-heated systems,
e.g. combination boilers (fig.2)
The shower control must be installed with a
multipoint gas water heater or combination
boiler of a fully modulating design (i.e.
to maintain relatively stable hot water
temperatures).
A drop tight pressure reducing valve must
be fitted if the supply pressures exceed 5 bar
running.
An expansion vessel (shown in fig.2) must be
fitted, and regularly maintained, to make sure
the shower mixer is not damaged by excess
pressures. This may already be installed within
the boiler (check with manufacturer) and is in
addition to the normally larger central heating
expansion vessel.
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 hot supply temperature
must remain a minimum of 10°C hotter than
the required blend temperature for best
performance.
b) Unvented mains pressure systems
(fig.3)
The shower control 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
fit 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 (fig.3)
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.
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.
CH flow
Cold
mains
supply
Hot water
Expansion
vessel
CH return
Service
valves
Shower
mixer
valve
Stop tap Pressure
reducing valve
Combination
boiler
Fig.2 (diagrammatic view – not to scale)

Dual control mixer
5
c) Mains pressurised thermal store
systems (fig.4)
Packages of this type, fitted with a tempering
valve (blender valve) can be used. A drop tight
pressure reducing valve must be fitted if the
supply pressures exceed 5 bar running.
An expansion vessel (shown in fig.4) must be
fitted, and regularly maintained, to ensure the
unit is not damaged by excess pressures. This
may already be installed externally or internally
within the thermal store (check with thermal
store manufacturer).
d) Gravity fed systems (fig.5)
The shower control MUST be fed from a cold
water cistern and hot water cylinder providing
nominally equal pressures. There must be a
minimum of two metres head of water. The
minimum head distance is measured from the
base of the cold water cistern to top of the fixed
head shower arm (fig.5).
DO NOT use jointing compounds on pipework.
2 metres
minimum
Isolating
valves
Other draw-offs
Gate
valve Vent pipe
tee
Cold supply
Hot
supply
Alternative
connection
Mixer valve
Stop
tap
Cold
water
mains
supply
Drain
valve
Cold water
cistern
Hot
water
cylinder
Fig.5 (diagrammatic view – not to scale)
Blender
valve
Flow
Cold mains supply
Hot water
Stop tap
Expansion vessel
Pressure
reducing valve Return
Service
valves
Mixer
valve
Boiler
Fig.4 (diagrammatic view – not to scale)

Dual control mixer
6
TEMPERATURE ADJUSTMENT
RANGE
The mixed water temperature can be adjusted
from cold through to a top limit (which can
be preset during installation – factory set
at approximately 39°C) with full anti-scald
protection throughout the range.
INSTANTANEOUS WATER HEATERS
APPLIANCE CAPABILITIES
In order to provide the best performance from
the shower when connected to an instantaneous
water heater, the appliance must be capable of
raising the temperature of the incoming water
by 45°C (81°F) and delivering a flow rate of not
less than 8 litres per minute.
A flow regulator is supplied for fitting into the
fixed head which controls the maximum flow
through an instantaneous water heater and the
shower valve to 8 litres per minute. To fit the
flow regulator, unscrew the adjustable head from
the fixed arm. Insert the flow regulator, flat face
up, into the end of the fixed arm (fig.6). Refit
the adjustable head to the fixed arm assembly.
With the flow regulator fitted and when the
system is in use, the On/Off flow control should
be turned fully anti-clockwise to the full flow
setting.
Flow regulator
Fig.6

Dual control mixer
7
PREPARING THE MIXER VALVE
Check the contents to make sure all parts are
present.
Make sure the supplied metal fixing bracket,
tiling shroud, cranked spanner, lock nut key and
Allen key are all to hand.
Before installing, make sure all the openings
on the valve are carefully covered to stop the
ingress of any debris, etc.
The valve unit is supplied with a mounting
bracket for installing into a chased out cavity in
a solid wall, a stud partition wall, dry lined wall
or fixing to a shower cubicle or panel. It is also
supplied with an attached tiling shroud which
provides protection for the valve both for transit
and on site. It should be left in place until the
installation is complete.
The hot and cold water pipes should not be
permanently attached to the wall closer than 2m
from the valve prior to installation. This allows
for final adjustment of the valve position.
SITING OF THE SHOWER
Refer to (fig.7) for correct siting of the shower.
Position the shower and showerhead on the wall
so that all controls can be comfortably reached
while using the shower.
The valve unit can be fitted in any orientation.
For a wall mounted showerhead installation, the
plumbing will be simplified if the outlet is fitted
upwards.
WARNING!
The shower must not be positioned
where it will be subjected to
freezing conditions.
Height of
showerhead
and shower
to suit user’s
requirement.
Fig.7 (diagrammatic view – not to scale)

Dual control mixer
8
Cold water supply Hot water supply
Thermostatic
assembly
On/Off
assembly
Swivel inlet
(Do not tighten
against body)
Mixed water
outlet
115 mm
pipe centres
INSTALLATION
a) General conditions
Note: The outlet of the shower MUST
NOT be connected to any tap or fitting not
recommended by Triton Plc.
DO NOT use jointing compounds on any pipe
fittings for the installation.
Use only the compression fittings supplied.
DO NOT solder fittings near to the shower
unit as heat can transfer along pipework and
damage components.
Note: Suitable isolating valves (complying
with Water regulations) MUST be fitted 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.
When connecting pipework avoid using tight
90° elbows. Swept or formed bends will give the
best performance.
The valve unit can be fitted in any orientation
(fig.8), but for a wall mounted showerhead
installation, the plumbing will be simplified if the
outlet is fitted upwards. Access to the integral
strainers will also be improved with this layout.
The hot water inlet is identified with a red mark,
the cold water inlet with a blue mark. The swivel
inlets allow for either rising or falling hot and
cold water supplies. Note the swivel inlets have
‘O’ seals to the body and do not require PTFE
tape or other means of sealing.
Gently screw the swivel inlets into the body of
the valve unit and stop as soon as resistance is
felt. Then back off by up to 1.5 turns to align
the inlet with the hot and cold supply pipes.
IMPORTANT: The swivel inlets MUST NOT be
tightened against the valve body to make a
seal (fig.9).
The Triton dual control mixer valve includes a
mounting bracket which allows the installer to
mount the shower into a solid, stud partition or
other hollow wall structures. The bracket can
also be used for fitting in a shower cubicle or
panel providing the back of the cubicle or panel
is accessible.
Fig.9
H
H
H
Outlet
C
C
C
H
Outlet
Outlet
Outlet
C
Fig.8

Dual control mixer
9
When installing into a stud partition or other
hollow wall structure the installer may wish to
consider building rear supports or other options.
Such options are beyond the scope of this guide.
Before installing, make sure the available depth
of recess or cavity is at least 65 mm (fig.10)
measured from the face of the wall upon which
the mounting bracket is screwed (excluding the
tile thickness).
The allowance for varying thickness of tiles up to
10 mm is accommodated by a limited degree of
tolerance between the control knobs and their
trim rings.
If the valve unit is to be fitted behind an existing
wall panel, use the supplied self-adhesive
template as a guide when cutting the opening.
Wall surface
Tolerance
for varying
tile thickness
Tiles
65 mm
Fig.10

Dual control mixer
10
b) Valve installation in solid wall
Remove the tiling shroud, if fitted, from the
valve unit. The shroud is retained by a 2.5 mm
hex socket screw; replace the screw in the valve
immediately to avoid it being lost.
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.
The building depth should be at least 70 mm
deep from the surface of the wall. It is
recommended to use the supplied mounting
bracket (fig.11) at all times when installing
the shower valve. It provides the correct visible
amount of shower control through the faceplate
when the installation is complete. There is
limited tolerance between the control knobs and
trim rings to allow for varying thickness of tiles
up to 10 mm.
As a guide for the size of hole, place the tiling
shroud on the wall and trace around it (fig.12).
Remove the plaster and brickwork to the
required depth and chase out any additional
areas of the wall to allow for the pipework to
and from the valve.
Offer the mounting bracket up to the wall
and mark the four outer plain holes (fig.13).
Remove the bracket then drill and plug the
wall. Screw the bracket to the wall. Route the
pipework to valve position.
Flush out the pipework in accordance with
Water Regulations.
Offer the valve up to the mounting bracket, and
secure using the four screws provided.
Proceed to ‘Connecting supply pipes’ section.
135 mm
maximum
235 mm
maximum
Fig.11
Fig.12
Fig.13

Dual control mixer
11
c) Valve installation in a hollow wall
The wall mounting bracket supplied with the
shower is suitable for use on a plasterboard wall
of 10 mm to 15 mm thickness.
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.
The hollow cavity should be at least 65 mm
deep from the surface of the wall. It is
recommended to use the supplied mounting
bracket (fig.14) at all times when installing
the shower valve. It provides the correct visible
amount of shower control through the faceplate
when the installation is complete. There is
limited tolerance between the control knobs and
trim rings to allow for varying thickness of tiles
up to 10 mm.
Mark the route of the incoming and outgoing
pipework. As a guide for the size of hole, place
the tile shroud on the wall and trace around it
(fig.12).
Take out the plasterboard and offer the
mounting bracket up to the wall and mark the
four outer plain holes (fig.14). Remove the
bracket and drill the wall.
Two additional flat brackets are supplied for
hollow wall fixing. Slide the ‘T’ piece section
through the slot either side of the mounting
bracket then insert it into the wall cavity.
Position the two flat brackets in line with the
outer holes (fig.15). Secure using the bolts
provided. Route the pipework to the valve
position.
Flush out the pipework in accordance with
Water Regulations.
Offer the valve up to the mounting bracket and
secure using the four screws provided.
Proceed to ‘Connecting supply pipes’ section.
Flat bracket
positioned inside
of panel
Fig.14
Fig.15

Dual control mixer
12
Fig.18
d) Valve installation in a panel or
cubicle
To use the wall mounting bracket supplied with
a shower cubicle or a laminated panel, wooden
blocks are required to increase the depth of
the bracket. These blocks need to increase the
depth of the bracket to between 70.5 mm and
76.5 mm from the finished surface (fig.16).
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.
Mark the route of the incoming and outgoing
pipework. Only the two holes for the controls
knobs require to be cut out of the panel or
cubicle. Use the supplied template as a guide
(fig.17).
After cutting the two holes, fit the valve to the
mounting bracket and secure using the four
screws provided.
Offer the valve and mounting bracket up to the
back of the panel making sure the thermostatic
and On/Off assemblies fit through the openings.
Mark the four inner tapped holes (fig.18).
Remove the valve and bracket and drill the panel
and wooden blocks. Route the pipework to valve
position.
Flush out the pipework in accordance with
Water Regulations.
Fit the mounting bracket together with the valve
to the panel and secure using the bolts and
washers provided.
Proceed to ‘Connecting supply pipes’ section.
Flow
Temperature
99 mm
centres
33 mm
dia
43 mm
dia
Panel
surface
Blocks
70.5 to 76.5 mm
Fig.16
Fig.17

Dual control mixer
13
CONNECTING THE SUPPLY PIPES
Gently screw the swivel inlets into the body of
the valve unit and stop as soon as resistance is
felt. Then back off by up to 1.5 turns to align
the inlet with the hot and cold supply pipes.
IMPORTANT: The swivel inlets MUST NOT be
tightened against the valve body to make a
seal.
Connect the hot water supply to the inlet
marked RED, and connect the cold water supply
to the inlet with the BLUE mark.
Remember the swivel inlet has an ‘O’ ring seal
and that no other sealing means is required.
Tighten the compression fittings with the
cranked spanner, supplied for when access is
restricted.
Make sure the On/Off assembly is turned to the
off position by temporarily fitting the On/Off
control and turning clockwise until resistance is
felt.
Open the supplies and test for leaks in the
pipework upstream of the valve.
OUTLET ADAPTOR
The mixed water outlet adaptor needs to be
removed and replaced using PTFE tape to give a
watertight seal.
Note: The outlet adaptor is reversible with one
side suitable for connection to a flexible hose
– flat end (fig.19), and the other is a chamfered
end for a 15 mm compression fitting (fig.19).
Hose end
(flat)
Pipe end
(chamfered)
Fig.19

Dual control mixer
14
Appropriate
fitting
Water pipe
Connector
Fitting should
be flush with
the finished wall
FITTING THE FIXED HEAD
Complete the pipework leading to the shower
arm with a 15 mm x ½" BSP female thread
elbow (fig.20) or similar. Finish the wall so that
it is flush with the fitting.
Note: This fitting is not supplied as variations
in installations require the selection of a suitable
solder or compression fitting.
Screw the supplied male-thread connector into
the female fitting (fig.21) using PTFE tape to
give a watertight joint.
Slide the arm onto the connector temporarily,
and mark the position of the three retaining
screws. Remove the arm then 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).
Refit the fixed arm onto the connector and
secure in place using the screws supplied.
Tighten the grub screw in the base of the arm
using an Allen key (fig.22).
Slide the cover trim onto the arm and push fit
into place before fitting the showerhead.
Fig.20
Fig.22
Fig.21

Dual control mixer
15
Remove
shaded
area to
allow
for the
mounting
bracket
USING THE TILING SHROUD
The tiling shroud will need a section removed
(fig.23) to accommodate the mounting
bracket.
Replace the tiling shroud over the mixer valve.
Plaster or tile up to the edge of the shroud. Note
that if the tiles are accurately cut to match the
profile of the shroud, then the faceplate will seal
around the hole in the tiles, and the valve unit
will be able to be removed from the mounting
bracket without the need to break any tiles.
Make sure the grout lines around the valve are
flush with the tiles in order to provide a smooth
sealing surface for the faceplate.
FITTING THE FACEPLATE AND
KNOBS
Unscrew the faceplate retaining rings from the
valve unit (if fitted).
See (fig.24) for the assembly of parts. Position
the faceplate over the valve unit and place the
trim rings onto the faceplate making sure the
indicator notch is in the 12 o’clock position.
It must be in this position regardless in which
orientation the unit is mounted.
Secure by screwing on the two brass faceplate
retaining rings.
Gently tighten the rings by hand until the
faceplate clamps gently against the wall.
DO NOT overtighten or the faceplate may
distort. The faceplate incorporates a silicon
sponge seal which will seal against a smooth
wall.
Fig.23
WARNING!
Check there are no hidden cables or
pipes before drilling holes for wall
plugs. Use great care when using
power tools near water. The use of
a residual current device (RCD) is
recommended.

Dual control mixer
16
Face plate
Trim ring
Trim ring
Brass
face plate
retaining ring
(small hole)
Brass face plate retaining ring
(large hole)
Temperature
control knob
Locknut
Finishing
cap
Finishing
cap
Splined
adaptor
On/off
control knob
Screw and
washer
Locknut
key
Fig.24
Should the wall surface be uneven or has deep
grout lines or other imperfections, then these
must be filled in, or use a bead of silicon sealant
around the joint between the faceplate and the
wall.
DO NOT apply this until the knobs have been
assembled onto the mixer valve and finally
completed.
Temperature control knob assembly
Place the temperature knob temporarily onto the
splined adaptor, and rotate fully anti-clockwise.
Remove the knob and reposition onto the
splined adaptor again, but this time making
sure the ‘40’ mark on the scale lines up with the
indicator notch on the trim ring. It must be held
firmly but not overtight. Make sure the knob
does not foul on the trim ring.
Screw the locknut down against the knob and
tighten using the key supplied. Do not fit the
finishing cap just yet as when the commissioning
is carried out, the maximum temperature
adjusting screw may have to be altered.
On/Off control knob assembly
Place the splined On/Off knob onto the splined
shank and secure with the washer and fixing
screw.
Push fit the finishing cap onto the on/off knob.
Note the cap with the red and blue arrows fits
on the temperature control knob and the plain
cap fits on the On/Off knob. The caps are not
interchangeable.
Note: Should the knobs and faceplate require
cleaning then care must be taken not to scratch
them in the process. Wash away any surface
dust with the shower spray before cleaning with
soapy water.
IMPORTANT: DO NOT use abrasive cleaners
and solvents or the surfaces may become
damaged.

Dual control mixer
17
Maximum temperature
adjusting screw
Fig.25
COMMISSIONING
The following conforms to NHS Estates Model
Engineering Specification D08 for when the mixer
has been installed in healthcare premises.
IMPORTANT: Make sure that all supply
pipework has been flushed through before
commissioning.
Make sure that both 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.
Set the temperature control to the maximum
temperature setting – rotate the knob fully anti-
clockwise until resistance is felt.
Open the On/Off control by turning it anti-
clockwise. If a fixed head has been installed,
placing a burst polythene bag over the shower
head will catch and deflect the spray during
commissioning.
Allow the shower to run at maximum
temperature setting until the water temperature
has stabilised. Should the temperature rise in
an uncontrolled manner, then the hot and cold
supplies are probably reversed. This must be
corrected before proceeding further.
The mixer valve is factory set to provide a
maximum outlet temperature of 39°C but this
should be checked on site to make sure the
setting has not been altered and also to make
sure of user safety.
Should the maximum temperature require
adjustment, remove the temperature knob
finishing cap (if it has been placed in position
when assembling the temperature controls
previously) using a sharp blade or pen knife tip.
Adjust the small slotted screw in the centre of
the spindle (fig.25) – anti-clockwise to increase
the temperature, clockwise to decrease the
temperature.
The maximum temperature should not exceed
41°C.
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.

Dual control mixer
18
Finally, check the thermal shut off facility of the
valve by performing a thermal shut off test. Shut
off the cold supply. The flow 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 Service.
In domestic installations where D08 specification
is not required, the maximum temperature
setting should not exceed 45°C.
OPERATING THE SHOWER
To start the shower, rotate the On/Off control
fully anti-clockwise (fig.26) for maximum flow.
To stop the water flow, rotate the On/Off control
fully clockwise (fig.27) until resistance is felt.
To adjust the water temperature, rotate the
temperature control clockwise in the direction of
the blue symbol (fig.28) for a cooler shower, or
anti-clockwise in the direction of the red symbol
(fig.29) for a hotter shower.
ADJUSTING THE SHOWERHEAD
Five showerhead patterns are available. Adjust
the spray pattern by turning the bezel on the
showerhead in either direction until the desired
pattern is obtained.
Fig.26
Fig.29
Fig.27
Fig.28