Kohler Rada Exact-3 B Bedienungsanleitung

11057614-W2-D

These instructions must be left with the user

Product Manual

Exact-3 B

1057614-W2-D

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.

31057614-W2-D

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.

1057614-W2-D

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  

51057614-W2-D

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.

1057614-W2-D

*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.

50 100 150 200 250 300 350 400

450

Pressure Loss (KPa)

Rada Exact T3

Fluhs Headworks BF8700

Outlet Flow (L/Min)

71057614-W2-D

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).

1057614-W2-D

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.

91057614-W2-D

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.

1057614-W2-D

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.

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