Kohler rada Exact-3 B User manual

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

2
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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.

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.

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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.