Kohler Discovery User Manual
BUILT IN DUAL CONTROL
SHOWER VALVE
Installation and User Guide
These instructions are to be left with the user
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CONTENTS
Introduction ............................................................................................. 3
Safety : Warnings .................................................................................... 3
Pack Contents ......................................................................................... 4
Dimensions ............................................................................................. 5
Specifications ..........................................................................................6
Pressures ............................................................................................ 6
Temperatures ....................................................................................... 6
Flow Rates ...........................................................................................6
Connections ......................................................................................... 7
Installation Requirements ...................................................................... 8
Installation ............................................................................................. 10
General .............................................................................................. 10
Installation Methods ........................................................................... 11
1. Solid Wall or Stud Partition
(Using Securing Brackets - Mounting off Front Face) ................. 12
2. Solid Wall or Stud Partition
(Using Rear Fixing Points on Shower Control) ............................ 15
3. Laminated Panel
(Using Securing Brackets - Mounting off Rear Face) .................. 17
Control Assembly .............................................................................. 19
Reversed Supplies ............................................................................. 21
Commissioning ..................................................................................... 22
Maximum Temperature Setting .......................................................... 22
Operation ............................................................................................... 23
Fault Diagnosis ..................................................................................... 24
Maintenance .......................................................................................... 25
General .............................................................................................. 25
Lubricants .......................................................................................... 25
Cleaning ............................................................................................. 25
Filters ................................................................................................ 25
Spare Parts ............................................................................................ 26
Customer Service .................................................................... Back Page
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INTRODUCTION
The Mira Discovery Built in Dual Control Shower Valve is a thermostatic shower control
with independent selection for temperature and spray force and is suitable for
connection to concealed pipework.
SAFETY : WARNINGS
This Discovery Thermostatic Shower Control is precision engineered and should give
continued safe and controlled performance, provided:
1. It is installed, commissioned, operated and maintained in accordance with
manufacturers recommendations.
2. Periodic attention is given, when necessary, to maintain the product in good
functional order.
The function of a thermostatic mixing valve is to deliver water consistently at a safe
temperature. In keeping with every other mechanism, it cannot be considered as
functionally infallible and as such, cannot totally replace a supervisor’s vigilance where
that is necessary. Provided it is installed, commissioned, operated and maintained
within manufacturers recommendations, the risk of failure, if not eliminated, is reduced
to the minimum achievable.
If you experience any difficulty with the installation or operation of your new shower
control, then 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.
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PACK CONTENTS
Tick the appropriate boxes to familiarize yourself with the Discovery Thermostatic
Shower Control part names and to confirm that the parts are included.
1 x Control Assembly
1 x Shower Valve fitted to the Building-in Shroud
3 x Compression Nuts
1 x O-Key
3 x Olives
1 x Hose Washer
x Flow
Regulator
(12 litres per minute)
1 x Hexagon Key
3 x Mounting Brackets
3 x Wall Plugs
3 x Securing Screws
2 x M5 x 40 Screws
3 x M5 x 8 Screws
1 x Customer Support Card
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DIMENSIONS
186 mm
108 mm
Pipe Centres
Note! All Dimensions are Nominal
47 mm 64 - 82 mm
27 mm
231 mm
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SPECIFICATIONS
Pressures
Maximum Static Pressure: 10 Bar.
Minimum Maintained Pressure (Gas Water Heater): 1.0 Bar.
(for optimum performance initial supplies should be nominally equal).
Minimum Maintained Pressure (Gravity System): 0.1 Bar.
(0.1 bar = 1 Metre head from base of cold tank to the outlet of the shower handset).
Maximum Maintained Pressure: 5 Bar.
Temperatures
Factory Pre-set (Blend) Shower: 43°C.
Optimum Thermostatic Control Range: 35°C - 45°C.
(Achieved with supplies of 15°C cold, 65°C hot and nominally equal pressures).
Max. Hot Supply: 85°C.
Recommended Hot Supply: 60°C - 65°C.
Min. Differential between Hot Supply and Outlet Temperature: 10°C.
Cold Water Range: 1°C - 20°C.
Flow Rates
Typical Flow Rates - Mira Discovery Dual Control with Adjustable Fittings:
18
16
14
12
10
8
Flow Rate (L/Min)
6
4
2
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Supply Pressure (Bar)
Start (Outer Spray)
Soothe (Middle Spray)
Force (Inner Spray)
Rigid (Fixed Spray)
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With 12 L/Min Flow
Regulator Fitted
Connections
Standard connections are: Hot-Left, Cold-Right, Top-Outlet, if reversed inlets are
required refer to sections: ‘Installation’ and ‘Reversed Supplies’.
Inlets: 15 mm Compression.
Outlet: 15 mm Compression.
Thermostatic Shut-down
Thermostat will shut off Hot Supply Within 2 Seconds if Cold Supply Fails.
(Achieved only if the hot supply temperature is greater than 10°C above the set blend
temperature).
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INSTALLATION REQUIREMENTS
Key to symbols
Isolating valve
Mixing Valve
Overflow Indicator
Pressure Reducing Valve
Note! The Shower Control is compatible with the following installations.
Gravity fed system
The shower MUST be fed from a cold
water cistern and hot water cylinder
providing nominally equal pressure.
Twin Impeller Pump
Single Impeller Pump
Tempering Valve
Mini Expansion Vessel
Gas heated system
The shower MUST be installed with a
gas water heater or combination boiler
of a fully modulating design.
Note! Flow regulator recommended to be
installed, refer to the ‘Discovery Fittings
Installation and User Guide’. However,
it is possible following installation of a
flow regulator that the flow rate is reduced
too much for the boiler to ignite. If this is
Flow Regulator Recommended
the case remove the flow regulator.
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Unvented mains pressure system
The shower can be installed with a
unvented, stored hot water cylinder.
Flow Regulator Recommended
Mains pressurised instantaneous
hot water system (thermal store)
The shower can be installed with
systems of this type with balanced
pressures.
Note! Flow regulator recommended to be
installed, refer to the ‘Discovery Fittings
Installation Manual’.
Flow Regulator Recommended
Pumped system
The shower can be installed with an inlet
pump (twin impeller). The pump must be
installed on the floor next to the hot water
cylinder.
Note! Flow regulator recommended to be
installed, refer to the ‘Discovery Fittings
Installation Manual’.
Flow Regulator Recommended
30°-60°
Air Separation
90°
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