Kohler Discovery User Manual

BUILT IN DUAL CONTROL
SHOWER VALVE
Installation and User Guide
These instructions are to be left with the user
1
CONTENTS
Introduction ............................................................................................. 3
Safety : Warnings .................................................................................... 3
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
2

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.
3

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
4

DIMENSIONS

186 mm
108 mm
Pipe Centres
Note! All Dimensions are Nominal
47 mm 64 - 82 mm
27 mm
231 mm
5

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)
6
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).
7

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.
8
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°
9

INSTALLATION

General

Installation must be carried out in accordance with these instructions, and must be conducted by designated, qualified and competent personnel.
The installation must comply with the “Water Supply Regulations 1999 (Water Fittings)” or any particular regulations and practices, specified by the local water company or water undertakers.
Note! Make sure that all site requirements correspond to the information given in the section: ‘Specifications’.
Caution! The shower must not be installed in an area where it may freeze. For stud partitions alternative fixings may be required.
1. Isolating valves must be installed close to the valve for ease of maintenance.
2. Pipework must be rigidly supported and avoid any strain on the connections.
3. Pipework dead-legs should be kept to a minimum.
4. Supply pipework layout should be arranged to minimise the effect of other outlet
usage upon the dynamic pressures at the valve inlets.
5. Inlet and outlet threaded joint connections should be made with PTFE tape or
liquid sealant. Do not use oil-based, non-setting joint compounds.
6. To eliminate pipe debris it is essential that supply pipes are thoroughly flushed
through before final connection.
7. Determine the route for the hot and cold supply pipework and for the outlet pipework.
When connecting to the biv shower fittings it is recommended that the outlet be positioned above and to one side of the shower control. This is to prevent the flexible hose from obstructing the temperature and flow knobs of the shower control.
8. Decide on a suitable position for the
shower control. The position of the shower control and the shower fittings must provide a minimum gap of 25 mm between the spill-over level of the shower tray/bath and the handset. This is to prevent back-siphonage. For further information on the installation of your shower fittings, refer to the Discovery Fittings Installation and User Guide.
Note! Only use shower fittings recommended by the manufacturer or supplier.
Hose Retaining Ring
25 mm Minimum
Spill-over Level
10

Installation Methods

The Discovery Thermostatic Shower Control can be installed using Rear Fixing Points on the Body, or by using the Securing Brackets (supplied) on the Front Face of a Solid Wall or Stud Partition, or on the Rear Face of a Laminated Panel.
For installation from the front face into a Solid Wall or Stud Partition using the Securing Brackets, go to section:
‘Installation, 1. Solid Wall or Stud Partition (Using Securing Brackets ­Mounting off Front Face)’.
For installation from the front face into a Solid Wall or Stud Partition using the Rear Fixing Points, go to section: ‘Installation,
2. Solid Wall or Stud Partition (Using Rear Fixing Points on Shower Control)’.
For installation behind a Laminated Panel using the Securing Brackets, go to section:
‘Installation, 3. Laminated Panel (Using Securing Brackets - Mounting off Rear Face)’.
Warning! Bottom bracket not
to be drilled or screwed to.
11

1. Solid Wall or Stud Partition (Using Securing Brackets - Mounting off Front Face)

1.1 Remove the three securing screws and
remove the shower valve from the building-in shroud (retain the screws for later use).
1.2 Mark the position of the shower valve,
a cut out 150 x 170 mm (Max) is required.
Note! Use a spirit level to make sure that the hole cutout will be horizontal and vertical.
1.3 Mark the routes for the hot and cold
supply pipework at 108 mm centres.
Outlet Pipe BIV Outlet Pipe BIV
Falling Supplies: For falling supplies remove the grubscrew on each elbow. Remove the elbows and install on opposite sides. Secure the elbows with the grub screws.
Hot Inlet Cold Inlet
Note! Make sure that the filter plugs are positioned to the front (i.e. hexagonal key facing forward).
170 mm Max
150 mm Max
Outlet Pipe BIR
Shower Control
1.4 Mark the route for the outlet pipework.
Note! For biv models the outlet elbow
should be sited above the control and on the right or left, as site dictates.
1.5 Cut away the plasterboard or brick work
to a minimum depth of 58 mm to accommodate the shower valve body, the hot and cold supply pipework and the outlet pipework.
1.6 Make sure that the building-in shroud
fits inside the hole cutout.
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6 mm Min Finished Wall
Finished Wall
24 mm Max Finished Wall
58 mm Min
1.7 Fit the three securing brackets to the
shower valve. Important! Make sure that the correct
holes are used, otherwise the backplate will not fit (refer to illustration).
Note! The brackets can be rotated for suitable fixing points.
1.8 Mark the positions of the countersunk
fixing holes on the wall. Note! Make sure that they do not
interfere with the pipework.
1.9 Drill three 6 mm holes for the wall
plugs.
Rotate for Suitable Fixing Point
Backplate Securing Holes
1.10 Fit the wall plugs (supplied) and secure
the shower valve to the wall with the securing screws (supplied).
Note! For stud partition installations alternative fixings may be required (not supplied).
Important! At this point position the building-in shroud onto the shower valve and make sure that it is horizontal and will be parallel to the finished wall surface.
1.11 Remove the building-in shroud and fit
the hot and cold supply pipes and outlet pipe and tighten the compression nuts.
Caution! Make sure that the olives are fitted and all pipework is flushed through before connecting to the shower valve.
1.12 Fit the outlet pipework, leaving enough
pipe through the wall to temporarily cap off.
Backplate Securing Hole
Countersunk Fixing Hole
Securing Screw
1.13 Turn on the water supplies and check
for leaks.
Securing Bracket
13
1.14 Re-fit the building-in shroud to the shower valve using the three fixing screws.
1.15 Using the building-in shroud as a guide for the finished wall thickness, finish the
wall. Caution! Make sure that the finished wall is within the minimum and maximum
limits otherwise the control components will not fit correctly.
1.16 Remove the building-in shroud. Retain the three securing screws for securing the
backplate.
1.17 Fit the shower fittings, refer to your fittings installation and user guide for
instructions.
1.18 Fit the control assembly, refer to section: ‘Control Assembly’.
Spirit Level
Building-in Shroud
Minimum Building-in Depth
Securing Screws
Maximum Building-in Depth
14

2. Solid Wall or Stud Partition (Using Rear Fixing Points on Shower Control)

2.1 Refer to section: ‘1. Solid Wall or
Stud Partition Installation (Using Securing Brackets - Mounting off Front Face)’ and follow instructions
1 to 4.
2.2 Cut away the plasterboard or brick work
to the required depth. Important! This depth ‘X’ will depend
on the finished wall thickness e.g. tiles or facia board. Refer to the table for this measurement.
For stud partitions depth ‘X’ refers to the distance from the rear mounting e.g. wooden baton, to the front of the wall (before tiling).
Rear Support
Finished Wall Surface
Finished Wall Thickness
Depth ‘X’
Finished Wall Thickness
(e.g. tile and adhesive)
6 mm
8 mm 10 mm 12 mm 14 mm 16 mm 18 mm 20 mm 22 mm 24 mm
Wall Cutout Depth ‘X’
76 - 58 mm 74 - 56 mm 72 - 54 mm 70 - 54 mm 68 - 54 mm 66 - 54 mm 64 - 54 mm 62 - 54 mm 60 - 54 mm 58 - 54 mm
15
2.3 Mark the positions of the fixing screw
holes on the wall.
2.4 For solid walls drill two 6 mm holes for the wall plugs.
2.5 Fit the wall plugs (supplied) and fix the shower valve to the wall with the securing screws (supplied).
Note! For stud partition installations alternative fixings may be required (not supplied) to fix the shower valve to the rear face of the wall cavity or to a timber noggin.
Important! At this point position the building-in shroud onto the shower valve and make sure that it is level, both horizontally and vertically.
2.6 Refer to section: ‘1. Solid Wall or Stud Partition Installation (Using Securing Brackets - Mounting off Front Face)’ and follow instructions 11
to 18.
Outlet Pipe to Fittings
Securing Screw
Cold Supply
Hot Supply
16
3. Laminated Panel
(Using Securing Brackets - Mounting off Rear Face)
Note! For laminated panels the shower
valve must be positioned from the rear of the panel.
Panel thickness must be between 4 and 22 mm (if a thicker panel is used it will be necessary to recess the securing brackets into the rear of the panel).
Important! Make sure that there is a minimum clearance of 64 mm behind the laminated panel to house the shower valve.
3.1 Remove the three securing screws and remove the shower valve from the building-in shroud (retain the screws for later use).
3.2 Mark the position of the shower valve, a cut out 150 x 170 mm (Max) is required.
Note! Use a spirit level to make sure that the hole cutout will be horizontal
M5 Fixing Hole
and vertical.
3.3 Carefully cut out the laminated panel and make sure that the building-in shroud fits inside the hole cutout.
3.4 Fit the securing brackets to the shower valve.
Important! The brackets must be fixed vertically as illustrated.
Important! Make sure that the correct holes are used, otherwise the backplate will not fit (see Warning below).
Backplate Securing Hole
3.5 Re-fit the building-in shroud to the shower valve using the three fixing screws.
Warning! Do not drill any holes for the bottom securing bracket. The bracket is used only to align the valve. If holes are drilled they will not be covered by the concealing plate.
170 mm Max
150 mm Max
Backplate Securing Holes
Filter Plug
17
3.6 To assist in marking the positions of
the fixing holes, reverse the shower valve and fit the building in shroud through the cutout in the front of the panel. Mark the positions of the M5 fixing holes in the two top brackets
only. Important! Make sure that the correct
holes are used (refer to illustration).
Warning! Do not drill any holes for the bottom securing bracket.
3.7 Drill the two 5 mm holes for the fixings
(countersink the holes at the front).
3.8 Remove the building-in shroud (retain the screws for later use).
3.9 Secure the shower valve (positioned from the rear of the panel) with the M5 x 40 mm fixing screws (refer to illustration).
3.10 Fit the hot and cold supply pipes and tighten the compression nuts.
Caution! Make sure that the olives are fitted and all pipework is flushed through before connecting to the shower control.
3.11 Fit the outlet pipework, leaving enough pipe through the wall to temporarily cap off.
3.12 Turn on the water supplies and check for leaks.
3.13 Fit the shower fittings, refer to your fittings installation and user guide for instructions.
3.14 Fit the concealing plate and control assembly, refer to section: ‘Control Assembly’.
M5 Fixing Holes
Securing Screws
Warning! Do not drill or screw here.
18

Control Assembly

1. Pull off the temperature knob.
2. Carefully separate the concealing plate
from the backplate. Note! Use a screwdriver in the cutout
to assist separation.
3. Fit the backplate to the shower control and secure with the three securing screws (removed from the building-in shroud). Make sure that the seal is fully compressed on the finished wall surface.
Note! If the finish is particularly uneven (i.e. due to grout lines), apply a small amount of silicone sealant to ensure a seal.
Caution! Do not overtighten the screws as this may cause the backplate to distort, preventing the fitting of the control knobs.
Concealing Plate
Temperature Knob
Cutout
Flow Control Hub
4. Align the flow control hub with the taper towards the top of the shower control (refer to illustration).
19
Backplate (Seal on Rear)
Securing Screws
5. Align the flow control lever so that the lever is pointing up (refer to illustration).
6. Slide the flow control lever and concealing plate over the flow control hub.
7. Latch the top of the concealing plate over the top of the backplate.
Note! You will need to push the concealing plate up and over the lip on top of the backplate (refer to illustration).
8. Clip the bottom of the concealing plate into position.
9. Align the temperature control knob with the hub and push the knob onto the concealing plate.
Note! If the finished wall thickness is less than 8 mm the temperature hub spacer will need to be removed, refer to section: ‘Commissioning’.
Note! The Thermostatic Shower Control is preset to approximately 43°C at the factory. If adjustment is required, refer to section:
‘Commissioning’.
Push up and Latch over the Top of the Backplate
Align Flow Lever as Shown
‘Click’ into Position
20

Reversed Supplies

The Discovery Dual Control is supplied with inlet connections Hot-Left, Cold-Right and Top-Outlet as standard. If the hot and cold water supply pipes have been reversed during installation the following procedure must be performed.
Note! Refer to illustrations in section: ‘Installation, Control Assembly’.
1. Isolate the hot and cold water supplies.
2. Pull off the temperature knob.
3. Unclip and remove the concealing
plate. Note! Use a screwdriver in the slot at
the bottom of the concealing plate to lever off.
4. Fit the ‘O’ Key (supplied) onto the
‘O’ Key
cartridge nut and turn anticlockwise. Unscrew and pull the cartridge clear from the body.
Note! Depending on the finished wall thickness it may be necessary to remove the backplate.
5. Rotate the cartridge 180°.
6. Make sure that the two cartridge side
seals are fitted and carefully push into the cartridge body.
Important! Make sure that the cartridge side seals do not extrude from the body when pushing the cartridge in. Damage to these seals may result in incorrect operation.
7. Position the cartridge lugs into the body slots and tighten the nut by turning the ‘O’ Key clockwise.
8. Restore the hot and cold water supplies and check for leaks.
9. Refer to section: ‘Installation, Control Assembly’ and follow instructions 3
to 9.
21

COMMISSIONING

Maximum Temperature Setting

The Thermostatic Shower Controls are preset at approximately 43 °C at the factory. If adjustment is required, set the maximum temperature as follows:
Note! Make sure that the hot water temperature is at least 10 °C above the required maximum showering temperature.
1. Pull-off the temperature knob.
2. Unscrew the temperature hub with a 3 mm hexagon key (supplied).
3. Remove the temperature hub and temperature hub spacer (if fitted).
4. Operate the flow control lever.
5. Rotate the spindle until required maximum blend temperature is obtained at discharge point (clockwise = decrease temperature).
Caution! When resistance is felt do not use force to turn any further, as this can
damage the internal parts.
6. Once the desired maximum blend temperature has been achieved, refit the temperature hub and temperature hub spacer (if required) without disturbing the spindle, positioning the temperature hub (or temperature hub spacer) so that the lug is against the left side of the stop on the cartridge face, thus preventing anticlockwise rotation which could damage the internal mechanism (refer to illustration). Make sure that the temperature has not altered.
Note! The temperature hub spacer will be required where the finished wall thickness is greater than 8 mm.
Cartridge Face Stop
Temperature Spindle
Temperature Hub Spacer
Temperature Hub
Screw
Rear Face of Temperature Hub / Spacer
Temperature Hub / Spacer Lug
Temperature Knob
22

OPERATION

OFF
ON
Flow Control Lever
HOT
Temperature Knob
COLD
Note! If excessive flow rate is experienced from the Shower Control, install the supplied Flow Regulator, refer to the Discovery Fittings Installation and User Guide.
23

FAULT DIAGNOSIS

SYMPTOM
1. Only hot or cold water from the control outlet.
a. Inlets reversed (hot supply to cold supply).
Refer to section: ‘Reversed Supplies’.
b. No hot water reaching the control.
CAUSE/RECTIFICATION
c. Check the filters for any blockage. d. Installation conditions outside operating
parameters: refer to sections: ‘Specifications’ and ‘Commissioning’.
2. Fluctuating or reduced flow rate.
a. Check the showerhead, hose and filters for any
blockage.
b. Make sure minimum flow rate is sufficient for
supply conditions.
c. Make sure the maintained inlet pressures are
nominally balanced and sufficient.
d. Make sure the inlet temperature differentials are
sufficient. e. Check the thermostatic performance. f. Flow regulator fitted incorrectly. g. Airlock or partial blockage in pipework.
3. No flow rate from the control outlet.
a. Check the showerhead, hose and filters for any
blockage.
b. Hot or cold supply failure.
4. Blend temperature drift.
a. Refer to symptom 2. above. b. Hot supply temperature fluctuation. c. Supply pressures fluctuating. d. Seal damage or wear. Renew the thermostatic
cartridge.
5. Maximum blend temperature setting too hot or too cold.
6. Water leaking from the shower control fitting.
a. Indicates incorrect maximum temperature
setting; refer to section: ‘Commissioning’. b. Refer to symptom 4. above. a. Normal for a short period after shut off. b. Check that the pressures are not in excess of
the for product. c. Renew the flow cartridge.
7. Flow rate too low or too high.
a. (Too low) Insufficient supply pressures. b. (Too low) Refer to symptom 2. above. c. (Too high) Supply pressure too high. Install
supplied flow regulator on the outlet.
d. (Too high) Refer to symptom 2. above.
Note! Refer to the Discovery Fittings Installation and User Guide.
24
Refer to Note below.
Refer to Note below.

MAINTENANCE

General

This Product 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.

Lubricants

Silicone-only based lubricants can be used to assist in refitting.
Caution! Oil based or other lubricant types, may cause rapid deterioration of seals.

Cleaning

Warning! Many household cleaners contain abrasive and chemical substances, and
should not be used for cleaning plated or plastic fittings. These finishes should be cleaned using a mild washing up detergent or soap solution, rinsed and then wiped dry with a soft cloth.

Filters

1. Isolate the supplies to the shower control and operate the flow control to drain
any residual water.
2. Unclip and remove the concealing plate.
3. Unscrew the 3 backplate securing screws and remove the backplate.
4. Unscrew the filter caps with the ‘O Key’ (supplied) or a 12 mm hexagonal wrench
and remove the filters.
5. Clean each filter in turn under a jet of water to remove any lodged particles.
6. Re-fit the filters and tighten the filter caps.
7. Restore the water supplies and check for leaks.
8. Reassemble the shower control (refer to section ‘Installation, Control Assembly’.
‘O’ Key
Supply Filter
25

SPARE PARTS

1609.040 (A) Thermostatic Cartridge Assembly
1609.041 (B) Elbow Pack (2 off)
1609.042 (C) Flow Control Assembly
1609.043 (D) Flow Control Housing
1609.044 (E) Non-Return Valve (2 off)
1609.045 (F) Screw Pack (not illustrated)
1609.046 (G) Filter Pack (2 off)
1609.047 (H) Seal Pack (not illustrated)
1609.048 (I) Component Pack
1609.049 (J) Concealing Plate Assembly
1609.050 (K) Hub Pack
1595.231 (L) ‘O’ Key
26
D
D
C
D
G
B
L
I
E
C, K, J
K, J
A
J
27

CUSTOMER SERVICE

1058366-W2-A (1609)
28
7
5
-
#
© Kohler Mira Limited, February 2006
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