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 Pack Contents ......................................................................................... 4 Dimensions ............................................................................................. 5 Specifications .............................................................
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.
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.
DIMENSIONS 186 mm 47 mm 64 - 82 mm 231 mm 27 mm 108 mm Pipe Centres Note! All Dimensions are Nominal 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.
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).
INSTALLATION REQUIREMENTS Key to symbols Isolating valve Twin Impeller Pump Mixing Valve Single Impeller Pump Overflow Indicator Tempering Valve Pressure Reducing Valve Mini Expansion Vessel 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.
Unvented mains pressure system d The shower can be installed with a de n unvented, stored hot water cylinder. me w Flo m co e rR o t ula g Re Mains pressurised instantaneous d hot water system (thermal store) de The shower can be installed withen systems of this type with balanced mm o pressures. ec to be Note! Flow regulator recommended R or t installed, refer to the ‘Discovery Fittings a l u Installation Manual’.
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’.
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)’.
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). 170 mm Max 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.
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. Rotate for Suitable Fixing Point Backplate Securing Holes 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. 1.
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.
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.
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.
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 170 mm Max 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.
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.
Control Assembly 1. Pull off the temperature knob. Concealing Plate 2. 3. 4. Carefully separate the concealing plate from the backplate. Note! Use a screwdriver in the cutout to assist separation. 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.
5. 6. 7. 8. 9. Align the flow control lever so that the lever is pointing up (refer to illustration). Slide the flow control lever and concealing plate over the flow control hub. 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). Clip the bottom of the concealing plate into position.
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.
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.
OPERATION Flow Control Lever OFF ON COLD HOT Temperature Knob 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.
FAULT DIAGNOSIS SYMPTOM 1. 2. CAUSE/RECTIFICATION Only hot or cold water from the control outlet. a. Fluctuating or reduced flow rate. a. b. c. d. b. c. d. 3. 4. 5. 6. 7. No flow rate from the control outlet. e. f. g. a. b. Blend temperature drift. a. b. c. d. Maximum blend temperature setting too hot or too cold. Water leaking from the shower control fitting. Flow rate too low or too high. a. b. a. b. c. a. b. c. d. Inlets reversed (hot supply to cold supply).
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.
SPARE PARTS 1609.040 1609.041 1609.042 1609.043 1609.044 1609.045 1609.046 1609.047 1609.048 1609.049 1609.050 1595.
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CUSTOMER SERVICE 7-#5 1058366-W2-A (1609) 28 © Kohler Mira Limited, February 2006
