Kohler rada Exact-3 B User manual

11057614-W2-D
These instructions must be left with the user
Product Manual
Exact-3 B

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The function of this thermostatic shower control is to deliver water consistently at a
safe temperature. This requires that:
1. It is installed, commissioned, operated and maintained in accordance with
the recommendations given in this Manual.
2. For Type 3 installations, valves are only to be used for applications covered
by their approved designations, refer to the TMV3 Requirements Manual.
3. Periodic attention is given, as necessary, to maintain the product in good
functional order. Recommended guidelines are given in the MAINTENANCE section.
4. Continueduseofthisproductinconditionsoutsidethespecicationlimits
given in this manual can present potential risk to users.
The use of the word 'failsafe' to describe the function of a thermostatic shower control
is both incorrect and misleading. In keeping with every other mechanism, it cannot
be considered as being functionally infallible.
Provided that the thermostatic shower control 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.
Malfunction of thermostatic shower controls are almost always progressive in nature
and will be detected by the use of proper temperature checking and maintenance
routines.
Certain types of system can result in the thermostatic shower control having excessive
'dead-legs' of pipework. Others allow an auxiliary cold water supply to be added to
the mixed water from the shower control. Such systems can disguise the onset of
thermostatic shower control malfunction.
Ultimately, the user or attendant must exercise due diligence to ensure 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.
SAFETY WARNINGS
ADVICE
INTRODUCTION
TheRadaExact-3BThermostaticshowercontrolisspeciedtomeetthehighest
standards of safety, comfort and economy as demanded by today’s users. All Rada
Exact-3 B are designed, manufactured and supported in accordance with accredited
BS EN ISO 9001:2008 Quality Systems.
This manual covers all Rada Exact-3 B Thermostatic shower controls manufactured
from January 2014.

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A 1/2" inlet/outlet thermostatic shower control employing a thermostatic temperature
sensor to provide water at safe, accurate temperatures for ablutionary or process
requirements.
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.
Rada Exact-3 B - 1/2” built-in thermostatic shower control for concealed pipework,
incorporating either chrome control knobs or white plastic lever controls.
DESCRIPTION
Model Designation
Rada Exact-3 B HP-S,LP-SE
DIMENSIONS
168 mm
252 mm
59 mm
55 mm
117 mm
12 mm
35 mm
Temperatureandowknobsarealsoavailablewithashortlever.

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PACK CONTENTS
1 x Product Manual 
1 x Foam Seal 
2 x Wall Plugs 
1 x Building-in Shroud 
1 x Valve Body 
1 x Concealing Plate 

2 x Countersunk
Short Bolts

2 x Countersunk
Fixing Screws
(Backplate + Seal Attached)
3 x Compression Nuts
3 x Olives 
3 x Flat-Faced
Inserts


2 x Countersunk
Long Bolts
Documentation
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  

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SPECIFICATION
Normal Operating Conditions are considered as:
- inlet dynamic pressures nominally balanced to within 10% of each other during
ow
- a differential of approximately 50°C between the hot and cold inlet
temperatures, and with differentials of 15-35°C between the blend setting and
either supply
- daily usage of 1-6 hours
- installation and usage environment not subject to extremes of temperature,
unauthorised tampering or wilful abuse.
Other Applications
Forinformationonotherspecicapplicationsorsuitability,refertoKohlerMiraLtd,
or Local Agent.
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.
Pressures and Flow Rates
Operating Parameters
ForType3installations,thesupplyconditionsspeciedintheTMV3Requirements
Manual take precedence over the operating parameters which follow.
For optimum performance, dynamic supply pressures should be nominally
equal.
Recommended Minimum Dynamic Supply Pressure: 0.15 bar (0.2 bar
healthcare).
Recommended Maximum Dynamic Supply Pressure: 5 bar.
Recommended Minimum Flow Rate:3 l/min at mid-blend with equal dynamic
supply pressures.
Recommended Maximum Flow Rate: 35 l/min at mid-blend (which equates
to maximum pressure loss of 3.0 bar).
Maximum Pressure Loss Ratio*: should not exceed 10:1, in favour of either
supply,duringow.
Maximum Static Pressure is 10 bar.
 Recommendedmaximumowvelocityinpipelinesis2metres/second.

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*PressureLossRatioisdeterminedbysubtractingtheresistancetoowattheoutlet
(generally known as “back pressure”, and measured at the outlet of the mixing tap)
from the dynamic pressures of the hot and cold water at each inlet of the mixing
tap.Thisisatitsextremewhenthemixingtapisbeingusedatitslowestowrate
and when the maximum inequality occurs in the pressure of the hot and cold water
supplies.
Hydraulic restriction: Flow Rate/Pressure Loss Graph - all models
(Shower control only, equal dynamic supply pressures, unrestricted outlet and
mid-blend temperature setting)
Temperatures
Optimum performance is obtained when temperature differentials of 20°Cor more
exist between blend and either supply. Blend control accuracy will begin to diminish
at temperature differentials below 12°C.
Blend Temperature Range: Between ambient cold and approximately 60°C,
according to hot water supply temperature.
Thermostatic Control Range: Approximately 25-60°C.
Optimum Thermostatic Control Range: 30-50°C.
Recommended Minimum Cold Water Supply Temperature: 1°C.
Recommended Maximum Hot Water Supply Temperature: 85°C.
Note! The shower control can accept temporary temperature excursions above 85°C
without damage, however operation at such elevated supply temperatures is not
recommended. For reasons of general safety, hot water storage temperatures should
ideally be maintained at between 60-65°C where serving ablutionary applications.
0
10
0
20
30
40
50
50 100 150 200 250 300 350 400
450
Pressure Loss (KPa)
Rada Exact T3
Fluhs Headworks BF8700
Outlet Flow (L/Min)

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Flow Control:
RadaExact-3Bshowercontrolshaveintegralowcontrol;nootheruser-
operatedowcontrollershouldbeusedwiththisshowercontrol.
Outlet: The outlet connector is designed to accept:
Flat-faced/angedunions(maximumangediameter20mm);useat-faced
insert (408 71, supplied)
15mmpipework;usecompressionolive(54210).
Connections:
Rada Exact-3 B - Inlets and Outlet: 1/2” BSP external union or 15 mm
compression (nut and olive provided).
Inlet/ Outlet Options:
INLETS: OUTLET:*
Exact-3 B Any Conguration bottom, top
*Products are supplied in the format shown in bold.
Standard Connections are: hot - left (marked red)
cold - right (marked blue)
Outlet - top (can be altered to bottom outlet if
required, refer to INSTALLATION)
Note! Should the supplies be reversed then the shower control will not be able
to control temperature. This can be corrected by reversing the position of the
Thermostatic cartridge within the control body, as described in INSTALLATION.
All models can operate in any plane, and may be inverted if necessary for supply
pipework layout convenience, provided hot and cold pipework are connected to
the appropriately marked inlets (hot - red, cold - blue).

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INSTALLATION
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 (Water Fittings) Regulations
orScottishByelaws”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. The shower control should be positioned for easy access during use and
maintenance. All routine maintenance procedures can be conducted with the
shower control body in place (except forstrainer and checkvalve access). For
all models, allow a minimum of 80 mm clearance in front of the temperature
control to enable removal of the serviceable parts during maintenance.
5. Thettingofisolationvalvesisrequiredascloseasispracticabletothewater
supply inlets of the thermostatic mixing valve.
6. The use of supply-line or zone strainers will reduce the need to remove debris
at each shower control point. The recommended minimum mesh aperture
dimension for such strainers is 0.5 mm.
7. Inlet pressure tappings which allow measurement of the inlet pressures tp
the mixing valve under running conditions are particularly recommended for
healthcare applications with Type 3 valves.
8. Pipework must be rigidly supported.
9. Pipework dead-legs should be kept to a minimum. The mixing water outlet piping
should not exceed 2 meters and the overall length from the hot water circuit to
the discharge point should not exceed 5 metres.
10. Supply pipework layout should be arranged to minimise the effect of other outlet
usage upon the dynamic pressures at the shower control inlets.
11. Do not use oil-based, non-setting jointing compounds on inlet or outlet
connections.
12. Toeliminatepipedebrisitisessentialthatsupplypipesarethoroughlyushed
through before connection to the shower control.
General
Outlet Position/Reversed Inlets
AllRadaExact-3Bshowercontrolsaresuppliedwithinletconnectionscongured
hot - left, cold - right, and top outlet as standard. It is essential that inlet supplies
correspond with the red and blue markings on the Thermostatic cartridge.

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Shouldtheexistinghotandcoldpipeworkmakethiscongurationinconvenient,or
a bottom outlet position be required, the inlets can be reversed.
If both the outlet and inlet positions require reversing, it is easier to simply rotate the
complete mixing valve through 180o.
Outlet Reversal must be done prior to installation of the mixing valve body. Rotate
the valve body through 180oso that the outlet is in the opposite position.
Reversed connections can be altered before or after the mixing valve has been
installed. Rotate the Thermostatic cartridge through 180o, which reverses the position
of the cartridge hot and cold inlets.
1. If the mixing valve body has already been installed, isolate the supplies to the
mixingvalve,andturnontheowcontroltoreleasepressureandtoassistthe
draining of residual water.
2. Removethetemperatureknobandtheowknob.
3. Installations must comply with all Local/National Water Supply Authority
Regulations/Bye-Laws, and building and Plumbing Regulations.
4. Carefully remove the concealing plate by inserting a suitable tool under the slot
provided at the bottom of the plate and levering round all four sides. Unscrew
and remove the metal and plastic backplates.
5. With the removal clip still in place, unscrew the head nut using 35 mm A/F
wrench;thiswillreleasethebodyshroudandalsobegintodrawtheThermostatic
cartridge out of the body. Note! Some residual water may be released. Pull the
Thermostatic cartridge free of the valve body.
6. Rotate the Thermostatic Cartridge through 180o and carefully push the cartridge
back into the valve body, checking that the 2 cartridge inlet port seals remain in
place, and locate cartridge lugs into body slots.
Note! The red and blue markings on the cartridge will now not correspond with
the body markings, so to avoid future confusion remove the red and blue stickers
from the valve body.
7. Inlet pressure tappings which allow measurement of the inlet pressures to
the mixing valve under running conditions are particularly recommended for
healthcare applications with Type 3 valves.
The mixed water outlet piping should not exceed 2 m and the overall length
from the hot water circuit to the discharge point should not exceed 5 m.
8. Carefullyalignandthentightentheheadnut;donotovertighten.
9. Complete the INSTALLATION, if appropriate.
10. If the mixing valve body has already been installed, restore hot and cold supplies
and check for any leaks.

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Installation - solid wall recess
The Rada Exact-3 B is suitable for building-in to solid, dry-lined, stud partition or dry
partition wall structures.
Toallowforconnectionofpipework,therecessinthewall(unnished)shouldbe
approximately the same shape as the building-in shroud. Place the building-in shroud
in the correct position on the wall and draw around it with a pencil.
The depth of concealment is critical, the minimum depth to accept the valve is
50mm,withanother15mmmaximumontopofthisfornishingcoatthicknessof
plaster and tiles or other material. This last dimension determines how much of the
temperatureorowknobswillbevisiblethroughtheconcealingplate.
Important!Predeterminethenishingthickness(e.g.tiles,plasteretc.)ontopof
the wall surface. If this is to be less than 10 mm then the pre-assembled mounting
bracket must be reversed (refer to Figure 2).
The building-in shroud protects the mixing valve during plastering/nishing and
provides a reference for the building-in depth.
1. Cut out the wall to the required dimensions.
2. This mixing valve is supplied with outlet to top, should the installation require
outlet to bottom, then refer to Outlet Position/Reversed Inlets.
3. Put the valve in the recess and connect inlet and outlet pipework, checking
that the hot and cold supplies have been piped to the correct inlets. Check all
connections are watertight.
4. Important! Flush through the hot and cold supplies thoroughly before connection
to mixing valve.
5. Mount the valve in the recess using appropriate wall screws/plugs.
Note!Ifthewallscrewsareunabletobexedintothewall,tthebuilding-
inshroudandllthecavitybehindthemountingbracketwithanappropriate
material (e.g. expandable foam).
6. Fitthebuilding-inshroudovermixingvalveinrecess.Plasterandtile,ornish
as appropriate, up to edge of shroud. Final wall surface must fall between 2
lines on building-in shroud.
7. Whenwallsurfaceisnished,removethebuilding-inshroud.
11. Retthebodyshroudsandbackplates,makingsurethatthefoamsealistight
aroundbothbodyshrouds.Rettheconcealingplateandknobassembliesso
that the markings will be visible to the user.
12. Themaximumtemperaturemaynowneedresetting;check,andifnecessary
refer to COMMISSIONING.