Geberit Twyford Sola TMV3 SF1135CP User manual

Sola Thermostatic Shower
Valve - TMV3
SF1135CP, SF1136CP & SF1137CP
Installation and Maintenance Instructions
In this procedure document we have endeavoured to make the information
as accurate as possible.
We cannot accept any responsibility should it be found that in any respect
the information is inaccurate or incomplete or becomes so as a result of
further developments or otherwise.
Twyford Bathrooms Registered Office
Geberit House
Academy Drive
Warwick
CV34 6QZ, UK
Part of the Geberit Group
Telephone: [phone]
Email: [email protected]
Website: www.twyfordbathrooms.com

1
Contents
Thank you for choosing the Twyford TMV3 thermostatic shower valve.
Subject Page
Introduction and Safety 2
Components - Exposed 3
Components - Concealed 4
Dimensions - Exposed 5
Dimensions - Concealed 6
Technical Data 7
Site Preparation 9
Installation - Exposed 10
Installation - Concealed 11
Calibration 13
Cartridge Replacement 13
Problem Solving 14
TMV3
Introduction 15
Application 16
Technical Specification 16
Installation 16
Commissioning 18
Maintenance 19
Tywford Guarantee 21
installation guide

2
Introduction
This installation guide has been produced for the Sola range of single outlet thermostatic
shower valves. These instructions cover the installation, operation and maintenance. Please
read the enclosed instructions before commencing the installation of this product, please note;
We recommend that the installation of any Twyford product is carried out by an
approved installer.
The installation must be carried out strictly in accordance with the Water Supply (Water Fitting)
Regulations 1999 and any local authority regulations.
If in doubt we recommend that you contact WRAS - Water Regulations Advisory Scheme on
Tel: [phone], your local water authority - details available on the WRAS website or
the Chartered Institute of Plumbing and Heating Engineers on Tel: [phone].
All products MUST be re-commissioned to suit site conditions to ensure optimum performance
levels of the product are obtained.
Safety
Twyford thermostatic showers must be installed and commissioned correctly to ensure that
water is supplied at a safe temperature to suit the users.
The showers are pre-set using ideal conditions to 38°C.
The maximum mixed temperature takes account of the allowable tolerances inherent in
thermostatic shower mixers and temperature losses.
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 Standard Act 2000, the maximum
mixed water outlet temperature is 43˚C.
Products
Sola TMV3 Thermostatic Shower Valve - Concealed SF1137CP
Sola TMV3 Thermostatic Shower Valve - Bottom Outlet Exposed SF1136CP
Sola TMV3 Thermostatic Shower Valve - Top Outlet Exposed SF1135CP
Check Content
Before commencing remove all components from packaging and check each component with
the contents list.
Ensure all parts are present, before discarding any packaging. If any parts are missing, do not
attempt to install your Sola shower valve until the missing parts have been obtained.

3
Components - Exposed
1
3
4
6
5
7
8
10
9
2
Item Qty Component Item Qty Component
1 1 Valve body - SF1136CP 6 1 Retaining screw
2 1 Valve body - SF1135CP 7 1 Outlet fitting
3 1 Thermostatic cartridge 8 2 Grub screw
4 1 Lever 9 1 Wall plate
5 1 Cap 10 2 Screw

4
Components - Concealed
1
2
4
6
5
7
11
10
13
12
Item Qty Component Item Qty Component
1 1 Valve body - SF1137CP 7 1 Outlet plug
3 1 Thermostatic cartridge 10 2 Wall fixing screw
4 1 Lever 11 1 Rectangular concealing plate
5 1 Cap 12 2 Plate fixing screw
6 1 Retaining screw 13 1 Concealing plate - small

5
150±5
123.5
SF1135CP Top Outlet
SF1136CP Bottom Outle
t
Dimensions - SF1135CP and SF1136CP

6
Dimensions - SF1137CP
Distance from wall
Minimum 28.5
Maximum 50
150±5
Ball Valve
Ball Valve
Wall fixing
hole
Wall
fixing hole
Plate fixing
hole
Plate fixing
hole
Small
concealing plate
Rectangular
concealing plate

7
Technical Data
The Twyford Sola thermostatic shower valve is suitable for installations on all types of
plumbing systems, including gravity supplies, fully pumped, modulating combination boiler,
unvented water heater and unbalanced supplies i.e. Cold Mains & Tank Fed Hot. They are
not suitable for non-modulating combination boilers.
Max Inlet Pressure (Static) 10 bar Max Inlet Temperature 85˚C
Max Inlet Pressure (Dynamic) 5 bar Pre Set Factory Temp Setting 38˚C
Min Operating Pressure (Dynamic) 0.2 bar Temperature Stability ±2˚C
Max Unbalanced Pressure Ratio 5:1 Min Temp Differential to
Inlet Connections (Body only) 15mm ensure fail-safe between hot
Outlet Connection ½” and cold supplies 10˚C
Unvented Mains Pressure System
The drawing shows a typical installation of a shower mixing valve in conjunction with an
unvented hot water system. This type of installation must be carried out in accordance with
Part G of the Building Regulations.
Whilst pressures are theoretically equal (balanced) most unvented hot systems have a
pressure reducing valve on the incoming cold water prior to the hot water storage vessel.
This means that the hot and cold pressures can be significantly different.
Most unvented systems use an inlet manifold located directly after the pressure reducing
valve.
It is recommended that the cold supply be
taken from one of the outlets of the manifold
directly to the shower as an independent
supply.
For systems without a manifold unit after the
pressure reducing valve and where the cold
water supply pressure is significantly higher
than the hot supply we recommend that a
separate pressure reducing valve is fitted to
the cold supply, as close as possible to the
shower valve and with no draw off points
between it and the shower valve.
Flow regulators are required for installations
where a PRV is not fitted to ensure
simultaneous demand is accounted for.
Manifold
PRV
PRV if
manifold is
not used
Cold Supply direct
from mains

8
Pumped Systems
Pumped systems use a booster pump to increase the pressure of the gravity fed water
supplies.
These booster pumps are used where the head
of water is insufficient to provide a satisfactory
shower or where a high performance shower is
required.
Please ensure that the performance of the pump
is matched to suit the shower.
Follow the instructions for gravity fed
installations taking into account the installation
requirements of the pump.
Ensure that the hot and cold water storage
capacity is sufficient to supply the shower and
any other draw off points that may be used
simultaneously.
Most pumps require a minimum head of water
to allow the flow switches to operate
automatically. Where this is not available a
negative head kit may be required to operate
the pump.
Please consult the pump manufacturer’s
installation requirements
Modulating Combi Boiler / Instantaneous Gas Water Heater
The drawing shows a typical installation of a shower valve in conjunction with a combination
boiler.
Combi boilers will produce a constant flow of water
at a temperature within its operating range. However
we recommend that the system should supply hot
water in excess of 60˚C.
The hot water flow rates are dependant upon the
type of boiler / heater used and the temperature rise
required to heat the cold water to the required
temperature.
The cold water flow rates may be much greater as
they are generally unrestricted from the mains cold
water supply. To ensure relatively balanced flow
rates, we recommend that a pressure reducing valve
or 6 l/min flow regulator is fitted in the cold water
supply pipe.
Cold Supply direct
from mains
Pumps

9
Gravity System
The drawing shows a typical installation of a shower valve on a gravity supplied system.
Please note the minimum head pressure required to ensure correct operation of the valve. In
accordance with good plumbing practice, we recommend that a totally independent hot and
cold water supply be taken to the valve.
The cold water supply must be connected
directly to the water cistern. The hot water
supply should be connected to the hot water
cylinder via an Essex flange or Sussex flange or
to the vent or a draw off pipe as close as
possible to the top of the cylinder.
For equal tank fed pressures there is no need to
fit the flow regulators. This installation is the
recommended minimum for gravity supplies.
For systems with less than 2 metre head
pressure, we recommend that a suitable booster
pump is fitted to increase the supply pressure.
Cold Mains & Gravity Hot Supplies
If the cold supply to the shower is direct from the
cold water mains and the hot water supply is
gravity fed from the cold water cistern via the
hot water cistern you MUST fit a pressure
reducing valve or a 6 l/min flow regulator.
Site Preparation
It is important to plan the installation thoroughly to suit site conditions before
commencing.
• Before commencing the installation ensure site conditions are suitable.
• Site conditions will determine how the shower valve will be installed.
• The thickness of wall tiles, plaster or plaster board should all be considered when positioning
the shower valve and routing the hot and cold supply pipes.
• Ensure the shower valve will be horizontal when installed.
• The shower valve must be installed securely into the wall using the method provided.
• The whole system should be thoroughly flushed, prior to the connection of the hot and cold
water supplies to the shower valve, to remove any debris that may be in the supply
pipework.
Min. 2m head
Option shown
for mains
pressure cold
& low pressure
hot water

10
Installation - SF1135CP and SF1136CP Exposed Shower Valve
The valve requires the supply pipework to have 150mm centres and sufficient copper pipe
(15 to 18 mm) must protrude from the finished tiled surface to allow a water tight compression
joint to be made.
Isolation valves must be fitted in an accessible position to both the hot and cold supplies
should the valve need to be isolated in the future for servicing.
The shower valve is designed for concealed pipework, whether in a solid or studded walls.
The shower valve can also be used with exposed supply pipes by rotating the inlet elbows and
removing the concealing plates (16).
Using the screws and plug provided secure
the wall plate to the wall, central to the two
protruding copper pipes.
Trim the copper pipes to correct length for the
compression joints.
Run a bead of sealant onto the back of the concealing plates (16) close to the outer edge.
Loosen the compression nuts (15).
Fit the shower valve over the copper pipes and locate onto the wall plate.
Ensure the concealing plates (16) are pressed onto the wall before tightening the grub screws
(8) and the compression nuts (15).
Turn on the water supplies and check for signs of leakage.
150 Ctr
16
15
14
15 - 18

11
Installation - SF1137CP concealed Shower Valve
The shower mixing valve is designed for concealed pipework, whether in a solid or studded
wall.
The inlet connections can be rotated to suit the direction of the supply pipes.
The outlet connection can be upwards or downward by inserting the outlet plug (7) into the port
which is not required.
The shower valve can be used as a template to mark its position onto the wall.
Remove the cap (5), retaining screw (6) and the lever (7).
4
6
5
11
13
12
Both inlets can
be rotated
10
7

12
Solid wall
•Create a large enough cavity for the shower valve and chase the wall for the two supply
pipes and a route from the outlet of the shower valve to the water outlet.
•Fix the shower valve into the cavity using the 2 fixing screws (10) ensuring the valve is
horizontal.
•Connect the two supply pipes and the outlet pipe to the shower valve and close the two ball
isolating valves on the opposite side to the supply pipe connection.
•Turn on the water supplies and check the compression joints for signs of leakage.
• Open both ball valves and turn on the shower valve so that the water runs from the handset
or overhead shower and check the joint for signs of leakage.
• Finish and tile the wall.
• Run a bead of sealant onto the back of the concealing plates (9) close to the outer edge.
• Locate the rectangular concealing plate(11) onto the shower valve and secure in position
adjacent to the wall with the plate retaining screws (8).
• Locate the circular concealing plate (13) onto the shower valve and push to the rectangular
concealing plate (11) and re-assemble the lever onto the shower valve.
Cavity wall
•The shower valve must be fixed securely to the structural members of the stud wall and/or
an additional member may need to be included where the shower valve will be located.
•If there is access from the adjacent room into the cavity, the surface of the shower room wall
can be finished with most of the tiling completed.
• Fix the shower valve to the structural member using 2 screws (10) supplied ensuring the
valve is horizontal.
• Ensure the shower valve protrude sufficiently from the finished wall surface to allow the
concealing plates and control lever to be fitted.
•Connect the two supply pipes and the outlet pipe to the shower valve and close the two ball
isolating valves on the opposite side to the supply pipe connection.
•Turn on the water supplies and check the compression joints for signs of leakage.
• Open both ball valves and turn on the shower valve so that the water runs from the handset
or overhead shower and check the joint for signs of leakage
• Run a bead of sealant onto the back of the concealing plate (11) close to the outer edge.
• Locate the rectangular concealing plate (11) onto the shower valve and secure in position
adjacent to the wall with the plate retaining screws (12).
• Locate the circular concealing plate (13) onto the shower valve and push to the rectangular
concealing plate (11) and re-assemble the lever onto the shower valve.

13
Calibration
The Sola shower valve has a factory set outlet temperature of 38˚C via the security setting.
This is based on a balanced supply pressure and a stable hot water inlet temperature of 65˚C.
However, the calibration point MUST be checked and re-set as necessary to suit site
conditions.
Care must be taken when re-calibrating the shower valve as INCORRECT CALIBRATION
CAN CAUSE INJURY.
• Remove the indice (5), retaining screw (6), handle (7) and the temperature stop ring (11).
• Temporarily refit the handle (7) and move to the position for the hottest water and allow the
outlet temperature to stabilise.
• Using a digital thermometer it is possible to increase or reduce the mixed water outlet
temperature until 38˚C is re-established, by slowly rotating the handle.
• Remove the handle (7) and refit the temperature stop ring (17) onto the splined section of
the cartridge at the maximum temperature position.
• Refit the handle in the reverse order.
PLEASE NOTE THAT ONCE CALIBRATED, THE SECURITY SETTING WILL ONLY BE
38˚C UNDER THE SUPPLY CONDITIONS USED FOR CALIBRATION.
Cartridge Replacement
5671718
Isolate both the hot and cold water supplies
Remove the indice (5), and unscrew retaining screw (6).
Remove the handle (7) and the temperature stop ring (17).
Using a suitable spanner unscrew the cartridge (18).
Replace with a new cartridge and assemble in the reverse
Spares
A full range of spares are available for this product.
PLEASE NOTE: Only genuine spares should be used.

14
Problem Solving
The following details are supplied for on site queries, should you require any further assistance
our Technical Department can be contacted on 01926 516800.
Fault Solution
Showering temperature is not hot enough. Ensure the hot water supply is at a
constant temperature above 60˚C.
Check for air locks in the pipework.
Thermostatic cartridge movement limited
due to lime scale build up
The water goes cold during showering. Insufficient stored hot water.
When used with a combi boiler confirm
that the boiler is still firing.
Adjust the boiler to a minimum setting of
65˚C which may not necessarily be the
best flow rate.
When the water is set at cold, the
showering temperature is too hot.
The hot and cold supply connections have
been made in reverse.
Thermostatic cartridge movement limited
due to lime scale build up
The maximum showering temperature is
too hot or when set to hot water runs to
cold.
Check the commissioned maximum
temperature of the shower valve.
Check the connections to the valve have
not been made in reverse.
Thermostatic cartridge movement limited
due to lime scale build up
The flow of water from the shower valve is
low.
Check the filters are clean and the supply
pressure is above 0.2 bar.
No flow of water Ensure the valve has not fail-safed and
check that there is hot and cold water flow
to the valve.
Ensure the check valves are not closed.
Shower is stiff to operate Build-up of limescale on flow control
cartridge - service and de-scale
Passing/dripping from outlet Service flow control cartridge.

15
Outlet Temperature Adjustment Range 30˚C to 50˚C
Temperature Stability ±2˚C
Maximum Hot Inlet Temperature 85˚C
DO8 Working Pressure Range 0.2 to 1.0 bar : Low Pressure
1.0 to 5.0 bar : High Pressure
Min Temp Differential (Mix to Hot) for Fail-Safe 10˚C
Max. Pressure Inlet Differential 5 : 1
Max. Flow Rate @ 1 bar Differential Ø15mm 1500 l/hr (25 l/m)
Ø22mm 1700 l/hr (28.3 l/m)
Operating Pressure Range High Pressure Low Pressure
Maximum Static Pressure 10 bar 10 bar
Flow Pressure, Hot and Cold 1 to 5 bar 0.2 to 1 bar
Hot Supply Temperature 55˚C to 65˚C 55˚C to 65˚C
Cold Supply Temperature 5˚C to 20˚C 5˚C to 20˚C
NOTE: Valves operating outside these conditions cannot be guaranteed by the Scheme to
operate as Type 3 valves. See Table 1 on page 6 for Recommended Outlet Temperatures.
Approvals
TMV3 Scheme Approval Number: Details Available on Request
WRAS Scheme Approval Number: Details Available on Request
Fail Safe Function
The Twyford thermostatic shower valves are designed to stop the mixed water flow in the event of
either the hot or cold water supply failing when installed in accordance with these instructions. To
ensure full closure of the mixed water flow the minimum temperature differential between the hot
water inlet to the valve and the mixed water outlet MUST be at least 10˚C.
installation guide TMV3
Introduction
The Twyford thermostatic shower valves have been specifically designed and manufactured to
meet the requirements of BS 7942: 2000 and NHS D08. The valve has been independently
tested and approved as a TYPE 3 valve under the TMV3 scheme.
Technical Specification / Conditions for use TMV3 Valves
Twyford TMV3 Thermostatic Shower Valve

16
Application
The Sola thermostatic shower valve has been independently tested by Buildcert Limited and
certified as meeting the requirements of the NHS D08 specification under the TMV3 Scheme as
being suitable for use on the following designations;
Shower HP-S
Temperature Setting
Ensure that the shower valve is commissioned under normal system conditions. The shower
valve MUST be commissioned to suit site conditions and the desired outlet temperature set by
the installer;
i With normal supply conditions established and the hot and cold water supplies running,
open the shower valve to its maximum temperature and leave running.
ii Remove the indice, retaining screw and handle by pulling away from the shower valve and
the temperature stop ring, see diagram on page 13.
iii Fully open the flow control and allow the outlet temperature to stabilise.
iv Temporarily refit the handle and using a digital thermometer it is possible to increase or
reduce the mixed water outlet temperature until 38˚C is re-established, by slowly rotating
the handle.
v Remove the handle and refit the temperature stop ring onto the splined section of the
cartridge at the maximum temperature position.
vi Refit the handle in the reverse order.
Installation
IMPORTANT - The following instructions must be read prior to the installation of any Twyford
shower valve. The installer should also be aware of their responsibility and duty of care to ensure
that all aspects of the installation comply with all current regulations and legislation.
Flushing through water systems using certain chemicals may wholly or partially remove the
lubricant from the internal workings of the valve, which may adversely affect its performance. We
recommend that following a flushing of the system with chemicals, valves are checked for correct
operation.
1 It is essential that before installing a Sola shower valve to ensure that the supply conditions
of the system, to which the valve is intended to be fitted, are checked to confirm compliance
with the parameters as quoted within the Technical Specification and conditions on which
the approval is granted i.e. verify supply temperatures, supply pressures, risk assessment.
2 Consideration must be made for the possibility of multiple / simultaneous demands being
made on the supply system whilst the shower valve is in use, all practical precautions must
be made to ensure that the basin shower is not affected. Failure to make provision within
the pipe sizing etc. will affect the performance of the shower.
installation guide TMV3

17
Installation
3 The supply system to which the Sola shower valve is to be installed into must be thoroughly
flushed and cleaned to remove any debris, which may have accumulated during the
installation. Failure to remove any debris will affect the performance and the manufacturer’s
warranty of the product.
In areas that are subject to aggressive water, provision must be made to treat the water
supply prior to the supply entering any product.
4 The maximum flow rate of the shower valve will only be achieved when the supply
conditions are achieved as quoted within the Technical Specification, with a flow condition
under 1 bar differential pressure.
5 These thermostatic shower valves has been designed for exposed or concealed mounting.
It is essential that access to the shower valve will not be obstructed for commissioning,
testing, or any future maintenance that may be required.
6 The hot and cold water supplies must be connected to the shower valve strictly in
accordance with these instructions i.e. hot water supply to the hot port of the shower valve.
7 In a situation where one or both of the water supplies are excessive, it is possible to fit a
pressure reducing valve or a flow regulator to reduce the pressure(s) to within the limits as
quoted previously.
8 Any thermostatic shower valve must be fitted with a back flow prevention device, such as
check valves to prevent the cross contamination of supplies.
9 Independent filters/check valves and isolation valves must be fitted in conjunction with the
Sola shower valve, as close as practically possible to the water supply inlets.
The Sola shower valve has integral filters and check valves in the inlet connection on the
hot and cold supplies.
10 It is essential that the Sola shower valve should not be installed in situations where there is
a possibility of the shower valve being deprived of water or where demands for water
are greater than the actual stored supplies.
11 To ensure that the performance levels of the Sola shower valve is maintained (in the event
of cold water failure), the temperature of the hot water supply at the point of entry to the
valves must be a minimum of 10˚C above the commissioned mixed water discharge
temperature.
12 The Sola shower valve must not be subject to any extreme temperature variations either
during the installation or under normal operating conditions.
installation guide TMV3

18
Commissioning
IMPORTANT - The following instructions must be read and understood prior to commissioning
the Sola thermostatic shower valve. If under any circumstances there are aspects to the
installation / system which do not comply with the specification laid down, the shower MUST NOT
be put into operation until the system / installation complies with our specification. However if all
these conditions are met, proceed to set the temperature as follows;
1 Ensure that the system is thoroughly cleaned and free from any debris prior to the
commissioning the Sola thermostatic shower valve.
2 Commissioning the temperatures must be carried out using a suitably calibrated
thermometer preferably a digital thermometer.
3 In the absence of other temperatures being specified, we recommend the outlet
temperature quoted in Table 1 are used.
Table 1
4 Each shower valve must be commissioned taking into consideration any fluctuations, which
may occur within the system due to simultaneous demands. It is advisable that any outlets
which are connected to the same supply as the shower valve are opened during the setting
of the mixed water temperature. During commissioning it is advisable to ensure that the
water temperatures are established before any attempt to commission.
5 Once the supply temperatures are stable and the normal operating conditions are
established, the shower valve can be commissioned. The temperature setting can be
adjusted following the procedure described earlier in the Temperature Setting section.
We suggest that the following sequence is followed when commissioning the valve:
5.1 Set the mixed water temperature to the required temperature.
5.2 Measure and record the temperature of the hot and cold water supplies at the
connection to the shower valve.
5.3 Measure and record the temperature of the water discharging from the shower valve.
5.4 Isolate the cold water supply to the shower and monitor the mixed water temperature.
5.5 Measure and record the maximum mixed water temperature and the final
temperature.The final temperature found during the test should not exceed the value
quoted in Table 2.
5.6 Record all the equipment used during the commissioning.
Table 2
Application Maximum Set Mixed Water Temp.
Shower 43˚C
Application Recommended Set Mixed Water Temp.
Shower 41˚C
installation guide TMV3

19
Commissioning
6 Ensure that the application, in which the shower valve will be used, is appropriate for the
approved designation. The above information must be recorded and updated on every
occasion when any work is carried out on the basin shower.
Maintenance
To ensure the Sola thermostatic shower valve maintains a high level of protection, we advise the
following in service testing is conducted (the same equipment used to commission the shower
valve initially must be used in the following tasks).
1 After a period of between 6 and 8 weeks from commissioning carry out the following;
1.1 Record the temperature of the hot and cold water supplies.
1.2 Record the temperature of the mixed water from the shower valve.
2 If the mixed water temperature has changed significantly from the previous test results (e.g.
>1˚K), record the change and before resetting the mixed water temperature check that:
2.1 All the strainers are clean.
2.2 All the check valves are in good working order.
2.3 The isolation valves are fully open.
3 If the mixed water temperatures are acceptable, carry out the following:
3.1 Record the temperature of the hot and cold water supplies.
3.2 Record the temperature of the mixed water from the shower valve.
3.3 Isolate the cold water supply to the mixing valve and monitor the mixed water
temperature.
3.4 Record the maximum temperature achieved as a result of (3.3) and the final
temperature (the final temperature should not exceed the values quoted in table 2)
3.6 Record the equipment used during these tests.
4 If the mixed water temperature is greater than the values quoted in table 2 or the maximum
temperature exceeds the corresponding values from previous test results by more than 2˚K,
the shower valve must be serviced.
5 After a period of between 12 to 15 weeks from commissioning, carry out the sequence of
tests as described in Maintenance sections 1, 2, 3 and 4.
installation guide TMV3