rada Autotherm-3 BSM User manual

1
IMPORTANT
Installer: This Manual is the property of the customer
and must be retained with the product for
maintenance and operational purposes.
PRODUCT MANUAL
THERMOSTATIC BATH SHOWER MIXER
BSM

2
CONTENTS
Introduction .............................................................................................3
Description...............................................................................................3
Safety : Warnings ....................................................................................4
Pack Contents .........................................................................................5
Dimensions ..............................................................................................6
Specications ..........................................................................................7
Installation ...............................................................................................9
General.................................................................................................9
Installing the BSM ..............................................................................10
Operation ...............................................................................................12
Commissioning .....................................................................................13
Commissioning Checks......................................................................13
Maximum Temperature....................................................................... 13
Maximum Temperature Setting ..........................................................14
Fault Diagnosis......................................................................................15
Maintenance...........................................................................................17
Planned Maintenance.........................................................................17
Flow Regulator Removal....................................................................19
Filter Cleaning/Replacement..............................................................21
Maintaining the Non Return Valves ....................................................23
Removing the Thermostatic Cartridge................................................25
Cleaning and Reassembly of the Thermostatic Cartridge.................. 27
Replacement of the Flow Cartridge....................................................29
Spare Parts ............................................................................................31
Accessories ...........................................................................................31
Notes ......................................................................................................33
Customer Service.................................................................................. 36

3
INTRODUCTION
The Rada Autotherm-3 BSM is a Thermostatic Bath and Shower Mixer (BSM)
specied to meet the highest standards of safety, and reliability as demanded by
today's users. All Rada products are designed, manufactured and supported in
accordance with accredited BS EN ISO 9001: 2000 Quality Systems.
The sufx '3' indicates that this mixer has been certied for use in UK Healthcare
premises as a Type 3 valve under the BUILDCERT TMV3 scheme. For Healthcare
installation refer to the TMV3 Requirements Manual. This product also complies with
the Water Supply (water ttings) Regulations 1999.
The approved designations for Type 3 Valves are as follows:
Model Designation Code
Rada Autotherm-3 BSM HP-S / HP-T44 / HP-D44 / LP-S / LP-T44 / LP-D44
The Rada Autotherm-3 BSM is a fully Thermostatic Bath and Shower Mixer, with an
integral Flow Control and Divertor. A patented temperature re-setting mechanism
automatically reduces the maximum allowable temperature when diverting from bath
to shower outlet (i.e. 44°C bath ll to below 41°C shower).
For ease of installation and maintenance this product includes a separate Inlet
Manifold which allows access to the Inlet Connections, Filters, Non Return Valves,
Flow Regulator (factory tted to the cold inlet) and Flexible Inlet Hoses incorporating
Isolating Ball Valves. It includes maintenance free Cartridges, a Thermostatic
Temperature Control Cartridge (based on the well proven Rada 215 / 222 range)
and a combined Ceramic Flow and Divertor Cartridge.
To make sure that the installation complies with Water Supply Regulations (backow
prevention) the correct type of Shower Fittings must be tted.
DESCRIPTION
If you experience any difculty with the installation or operation of your new Bath
Shower Mixer, please refer to 'Fault Diagnosis' before contacting Kohler Mira Limited.
Our telephone and fax numbers can be found on the back cover of this guide.
Patents and Design Registration
Design Registration: 000165071-0001-0002
Patents: GB: 2 291 693, 2 392 225, 2 421 297
Germany: 695 13 455.8
France: 0 694 721 (E)
Patent Applications: GB: 2 419 656, 0428359.4
Euro: 1 672 257, 03254070.0
USA: 2006-0124758-A1, 10/607 025

4
SAFETY : WARNINGS
Rada products are precision engineered and should give continued superior and
safe performance, provided:
1. They are installed, commissioned, operated and maintained in accordance with
the recommendations given in this Manual.
2. Type 3 Valves are only used for applications covered by their approved
designations refer to the TMV3 Requirements Manual..
3. Anyone who may have difculty understanding or operating the controls should
be attended when showering/bathing. Particular consideration should be given
to the young, the elderly, the inrm or anyone inexperienced in the correct
operation of the controls.
4. The use of the word ‘failsafe’ to describe the function of a Thermostatic Mixing
Valve is both incorrect and misleading. In keeping with every other mechanism
it cannot be considered as being functionally infallible.
5. Provided that the Thermostatic Mixing Valve is installed, commissioned, operated
within the specication limits and maintained according to this Manual, the risk
of malfunction, if not eliminated, is considerably reduced.
6. Malfunction of Thermostatic Mixing Valves is almost always progressive in
nature and will be detected by the use of proper temperature checking and
maintenance routines.
7. Certain types of system can result in the Thermostatic Mixing Valve having
excessive ‘dead-legs’ of pipework. Others allow an auxiliary cold water supply to
be added to the mixed water from the mixing valve. Such systems can disguise
the onset of Thermostatic Mixing Valve malfunction.
8. Ultimately, the user or attendant must exercise due diligence to make sure that
the delivery of warm water is at a stable, safe temperature. This is particularly
important in such healthcare procedures as supervised bathing of patients
unable to respond immediately to unsafe temperatures.

5
PACK CONTENTS
1 x 5 mm Hexagonal Wrench
1 x 3 mm Hexagonal Wrench
1 x Quad Key
1 x Rada Autotherm-3 BSM
1 x Gasket
2 x Backnut Adaptors
2 x Backnuts
2 x Flexible Hoses
(With combined isolators)
Tick the appropriate boxes to familiarize yourself with the part names and to
conrm that the parts are included.
1 x TMV3
Requirements Manual

6
DIMENSIONS
145
180
NOTE:- NOT TO SCALE - All dimensions are in millimetres
40
243 195
159
113
50
30
G3/4" INLETS
G1/2"
SHOWER

7
SPECIFICATIONS
Connections
Inlets: 3/4" BSP Male at 180 mm centres. Hot left, Cold right
Inlet with 0.5 m long Hoses: 22 mm Compression tting with Isolating Valves.
Shower Outlet: 1/2" BSP Male.
Rada Autotherm-3 is a fully Thermostatic Bath and Shower Mixer with an integral
Flow Control and Divertor. It is recommended that Rada Autotherm-3 Shower Fittings
are used with this BSM to optimise performance (refer to section: 'Accessories').
Weight
Autotherm-3 BSM: 6.3 Kg.
Temperature Control
Temperature selection range: full cold to full hot or max temperature limit.
Note: The BSM is preset to a maximum temperature of 43°C - 45°C for the bath
ll. It is important to check the maximum temperature during commissioning as the
setting will change with different supply conditions.
Thermostatic Temperature Control: 35°C - 45°C
Note: Optimum performance is obtained when a temperature differential of 20°C
or more exists between blend and either supply (i.e. 40°C blend set, cold water
temperature maximum 20°C, hot water minimum 60°C). To make sure that the BSM
shuts off the hot supply if the cold supply fails to prevent scalding, the minimum hot
water temperature must be 12°C above the blend temperature set ( i.e. 44°C blend
set minimum hot water temperature 56°C).
Flow Control
The BSM has an integral Flow Control and Divertor. No other type of user accessible
Flow Control should be tted to the Shower Outlet. Flow Regulators are tted to
control the ow at high pressures. For pressures below 1.0 Bar it is recommended that
the Flow Regulators are removed, refer to section: 'Flow Regulator Removal'.

8
Operating Parameters
For Type 3 installations, valves are only to be used for applications covered by their
approved designations, refer to the TMV3 Requirements Manual.
Inlet Supply Pressure
Maintained Inlet Pressures: 0.2 - 5 Bar
Max. Static Pressures: 10 Bar
Note: With low pressure systems (below 1 Bar) it may be necessary to remove the
Flow Regulators tted to the product as supplied, refer to section: 'Flow regulator
Removal'. Both hot and cold pressures should be nominally balanced within ± 10%.
Inlet Supply Temperature
Recommended Hot Temperature: 55°C - 65°C
Recommended Cold Temperature: 5°C - 20°C.
Note: The BSM can operate at temperatures up to 90°C for short periods without
damage. However for safety reasons it is recommended that the maximum hot water
temperatures is limited to 65°C.
Disinfection
In applications where system chemical disinfection is practised, chlorine can be
used (calculated chlorine concentration of 50 mg/l (ppm) maximum in water, per one
hour dwell time, at service interval frequency). Such procedures must be conducted
strictly in accordance with the information supplied with the disinfectant and with all
relevant Guidelines/Approved Codes of Practice.
If in any doubt as to the suitability of chemical solutions, refer to Kohler Mira Ltd,
or Local Agent.

9
INSTALLATION
General
The Installation must be carried out in accordance with these instructions, and must
be conducted by designated, qualied and competent personnel.
1. The installation must comply with the "water Supply Regulations 1999 (Water
Fittings)" or any particular regulations and practices, specied by the local water
company or water undertakers.
2. Before commencing, make sure that the installation conditions comply with
the information given in section 'Specications'. For Type 3 valves, see also
installation conditions in the TMV3 Requirements Manual.
3. Care must be taken during installation to prevent any risk of injury or
damage.
4. Isolating Valves are combined with the Flexible Hoses and should be positioned
for easy access when servicing the BSM.
5. To eliminate pipe debris it is essential that supply pipes are thoroughly ushed
through before connection to the BSM.
6. Pipework dead-legs should be kept to a minimum.
7. Supply pipework layout should be arranged to minimise the effect of hydraulic
restriction or other system usage upon the dynamic pressures at the BSM inlets.
Recommended minimum supply-line pipe diameter is 22 mm or 3/4".
8. Systems which provide maintained supply pressures in excess of 5 Bar must
be tted with suitable pressure reduction equipment to balance the system
pressures at an appropriate level.
9. Inlet pressure tappings which allow measurement of the inlet pressures to the
BSM under operating conditions are particularly recommended for healthcare
applications with Type 3 Valves. Available as an optional accessory, refer to
section: 'Accessories'.
Important!
Three Flow Regulators are supplied tted to the product. These are required to
limit the ow rate to the bath and shower when installed on high pressure systems
(> 1 Bar). On low pressure systems these may need to be removed to increase the
ow. Refer to section: 'Flow Regulator Removal'.
For combination boilers only, a fourth (white) Flow Regulator is supplied with the
product to make sure that the boiler can supply the Rada Autotherm-3 BSM with an
adequate supply of hot water. This must be tted in the hot inlet, refer to section:
'Flow Regulator Removal'.
The tting of this Flow Regulator will render the Rada Autotherm-3 outside
the scope of the TMV3 scheme.

10
Min
35 mm
Min
35 mm
180 mm
Ø 32 mm
Backnut Adaptor
Backnut
Installing the BSM
1. The Rada Autotherm-3 BSM can be installed on most standard baths and deck
surfaces (refer to illustration).
2. Fit the Bath Sealing Gasket to the BSM with the arrow pointing forward. Carefully
position on the bath (refer to illustration).
Note: Make sure that the Gasket provides an adequate seal. If the BSM
overhangs the 'roll' of the bath then silicone sealant must be used.
3. Fit the two Backnut Adaptors and the two 3/4" BSP Backnuts and tighten. Take
care to prevent damage to the bath.
4. Fit the Flexible Hoses (supplied) to the BSM using the Sealing Washers
provided.
5. Thoroughly ush out the incoming hot and cold water supplies before nal
connection of the BSM.
6. Connect the hot and cold water supplies with the 22 mm compression ttings
(supplied).
Important! The hot water supply MUST be connected to the hot inlet. This is
stamped Hon the top of the Manifold. Reversed connections could be dangerous
to the person using the BSM. The connections, when viewed from the front, are:
Hot – left, Cold – right
Shower Outlet
HOT COLD