MIRA DISCOVERY 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 ............................................................................................. 6 Specifications .............................................................
INTRODUCTION The Discovery Thermostatic Shower Control with independent selection for temperature and spray force. Mira Discovery Exposed: Shower control for connection to rising, falling or rear entry pipework. Mira Discovery Built-in: Shower control for connection to concealed pipework. This product has been certified as a Type 2 valve under the BUILDCERT TMV2 scheme. This product also complies with the water supply (water fittings) regulations 1999.
PACK CONTENTS 9 Tick the appropriate boxes to familiarize yourself with the Discovery Shower Control part names and to confirm that all the parts are included. Exposed Discovery Shower Control 1 x Shower Control 2 x Concealing Plates 2 x 15 mm Compression Nuts 1 x O-Key 2 x Concealing Caps 2 x Concealing Cap Seals 2 x 15 mm Olives 1 x Flow Regulator (12 litres per minute) 1 x 2.
Built-in Discovery Shower Control 1 x Shower Valve attached to the Building-in Shroud 1 x Control Assembly 1 x O-Key 3 x 15 mm Compression Nuts 3 x 15 mm Olives 2 x Wall Plugs 1 x Flow Regulator (12 litres per minute) 2 x Securing Screws 2 x M5 x 40 Screws 1 x 2.
DIMENSIONS Exposed Discovery Shower Control 153 131 106 70 Ø56 35 Built-in Discovery Shower Control 30 67 - 85 Building-in Depth 67 Ø183 Dimensions in mm 6
SPECIFICATIONS Operating Parameters For Type 2 valves, the supply conditions specified in section: 'Type 2 Valves Application' take precedence over the operating parameters which follow. Pressures Maximum Static Pressure: 10 Bar. Maximum Maintained Pressure: 5 Bar. Minimum Maintained Pressure (Gas Water Heater): 1.0 Bar. Note! For optimum performance the inlet pressures should be nominally equal and should not exceed 5:1, in favour of either supply, during flow.
Flow Rates Typical Flow Rates on Low Pressure Systems - Mira Discovery with Adjustable Fittings or Rigid Head: Typical Flow Rates on High Pressure Systems (with 12 Litres/Min Flow Regulator fitted in shower control outlet) - Mira Discovery with Adjustable Fittings or Rigid Head: 8
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. Note! A minimum head of 1 Metre is required from the bottom of the cold water feed tank to the handset.
Unvented mains pressure system The shower can be installed with a ed unvented, stored hot water cylinder. nd w o l F r o t la u g e R e m om c Re Mains pressurised instantaneous hot water system (thermal store) d The shower can be installed with de n systems of this type with balanced e m pressures. m co to be Note! Flow regulator recommended e R installed, refer to ther‘Discovery Fittings o t 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 Exposed Discovery Shower Control The Exposed Discovery Shower Control can be installed with Rear, Rising or Falling Supply Inlets. For Rear Entry Supplies, go to section: ‘Exposed Shower Control, 1. Rear Supplies’. For Rising or Falling Supplies, go to section: ‘Exposed Shower Control, 2. Rising or Falling Supplies’.
Exposed Shower Control 1. Rear Supplies 1.1 Use the Installation Template to mark the positions of the holes for the Backplate and the pipe centres. Note! Allow a minimum of 150 mm either side of the Shower Control, to allow the hot and cold inlet Compression Nuts to be tightened with the Spanner supplied. 1.2 For solid walls drill the Backplate holes with a 6 mm drill and fit the Wall Plugs (supplied). For other types of wall structure alternative fixings (not supplied) may be required. 1.
1.9 1.10 1.11 1.12 1.13 Caution! It is essential at this point that the supply pipework is thoroughly flushed through before connection to the Shower Control. Failure to do so may result in product malfunction. Put the Compression Nuts and Olives onto the pipework. Remove the Elbow Shrouds from the Shower Control. Align the Shower Control with the pipework and fit onto the Backplate. Tighten the Compression Nuts onto the Shower Control with the Spanner (supplied).
2. Rising or Falling Supplies 2.1 Remove the Elbow Shrouds from the Shower Control. 2.2 Rising Supplies: Loosen the Grubscrew on each Elbow using the 2.5 mm hexagon key (supplied) and pull off the Elbows from the Shower Control. Refit each Elbow on the opposite side and rotate 90° as required. Retighten the Grubscrews. Falling Supplies: Loosen the Grubscrew on each Elbow using the 2.5 mm hexagon key (supplied) and rotate the Elbows 90° as required. Retighten the Grubscrews. 2.
2.7 Attach the Backplate to the wall using the Fixing Screws (supplied). Note! The Grubscrew should be at the bottom. Caution! It is essential at this point that the supply pipework is thoroughly flushed through before connection to the Shower Control. Failure to do so may result in product malfunction. 2.8 Fit the Connector Covers and ‘O’ Seals onto the pipework. 2.9 Fit the Compression Nuts and Olives onto the pipework. 2.10 Align the Shower Control with the pipework and fit onto the Backplate. 2.
Built-in Shower Control 1. Solid Wall or Stud Partition (Using Securing Brackets - Mounting off Front Face) 1.1 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 Shower Controls. 1.
1.7 Fit the Securing Brackets to the Shower Control. Important! Make sure that the correct holes are used, otherwise the Backplate cannot be fitted. Note! The Securing Brackets can be rotated for suitable fixing points. Backplate Securing Hole Backplate Securing Hole 1.8 Mark the positions for the Countersunk Fixing Holes on the wall. 1.9 For solid walls drill two 6 mm holes for the Wall Plugs. Caution! Do not drill into pipes in the wall.
1.14 Attach the Building-in Shroud to the Shower Control using the two Securing Screws. 1.15 Using the ‘Finished Wall Indicator’ on the Building-in Shroud as a guide, finish the wall. Caution! Make sure that the finished wall is within the maximum and minimum limits or the control components will not fit correctly. 1.16 Remove the Building-in Shroud. Retain the two Securing Screws for fitting the Backplate. 1.17 Fit the Shower Fittings, refer to your Fittings Installation and User Guide for instructions. 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 (Using Securing Brackets - Mounting off Front Face)’ and follow steps 1.1 to 1.4. 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.
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 Insert the Wall Plugs (supplied) and attach the Shower Control to the wall with the Securing Screws provided. Note! For stud partition installations alternative fixings may be required (not supplied) to fix the shower control to the rear face of the wall cavity or to a timber noggin. 2.6 Refer to section: ‘1.
3. Laminated Panels (Using Securing Brackets - Mounting off Rear Face) Note! For laminated panels the shower control must be positioned from the rear of the panel. Panel thickness must be between 4 and 12 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 control. 3.
3.8 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. 3.9 Fit the outlet pipework, leaving enough pipe through the wall to temporarily cap off. 3.10 Turn on the water supplies and check for leaks. 3.11 Fit the Shower Fittings, refer to your Fittings Installation and User Guide for instructions. 3.
Control Assembly Important! The Yellow Lugs on the Flow Control must be in the fully clockwise (off) position in order to fit the Control Assembly. Note! The Flow Control Lugs on pre 2006 models are Black. 1. Rotate the Temperature Knob fully clockwise and carefully pull it off. 2. Remove the Grey Control Bearing. 3. Pull off the Flow Lever. 4. Remove the Flow Lever Adapter. Important! The Lever Retainer must not be removed. 5. Carefully unclip the Concealing Plate from the Backplate.
REVERSED SUPPLIES The Discovery Shower Control is supplied with inlet connections Hot-Left, Cold-Right and Bottom-Outlet as standard. If the hot and cold water supply pipes have been reversed during installation the following procedure must be performed. 1. Isolate the hot and cold water supplies. 2. Operate the Flow Lever and Temperature Knob to drain any residual water. 3. Rotate the Temperature Knob fully clockwise and carefully pull it off.
11. Rotate the Cartridge 180° to reverse the inlets to the Cartridge. Caution! Make sure the two Cartridge Side Seals are not damaged. 12. Refit the Cartridge into the Shower Control Body, make sure that the lugs engage in the slots in the Body. Note! To assist in refitting the Cartridge, rotate 45° (i.e. with the inlet seals at 2 and 8 o’clock) and push into the Shower Control, then rotate to align the lugs with the slots in the body and push fully home (refer to illustration).
COMMISSIONING The Thermostatic Shower Control is preset to approximately 43 °C at the factory. If adjustment is required, set the maximum temperature as follows: For Type 2 installations the maximum blend temperature is determined by the application, refer to the section 'Type 2 Valves - Application'. Flow Rate Note! Make sure that any inlet isolating valves are fully open.
OPERATION Shower Control (Exposed and Built-in Controls) Note! The shower performance may be effected if other water appliances are operated whilst the shower is in use. Turn the Flow Lever Anticlockwise to the Preset Maximum Flow OFF Turn the Temperature Control Knob Clockwise to decrease the Temperature, Anticlockwise to the Preset Maximum Temperature ON Caution! Do not force the Temperature Control Knob. If the desired temperature cannot be achieved refer to the section ‘Commissioning’.
FAULT FINDING SYMPTOM 1. Only hot or cold water from the shower head. 2. 3. 4. 5. 6. 7. a. b. c. d. Fluctuating or a. reduced flow b. rate. c. d. e. f. No flow from a. the control b. outlet. c. a. Blend temperature b. drift. c. d. a. Max blend temp too hot or too cold. b. Water leaking a. from the b. shower head. Flow rate too low or too high. c. d. a. b. c. d. e. CAUSE/RECTIFICATION Inlets reversed (hot supply to cold supply). Refer to the section ‘Reversed Supplies’.
MAINTENANCE General The Mira Discovery Shower Control is designed to be maintenance free, as such there are no serviceable parts in the cartridge. However regular cleaning will keep the shower in pristine condition, refer to section: ‘Maintenance, Cleaning’. Filters are fitted to the inlets of the mixer to protect the cartridge and will give many years of trouble free showering. Filters should be checked at yearly intervals and cleaned or replaced to maintain optimum shower performance.
Start Measure and record supply temperatures, pressures and make sure that they are within the valve specification. Measure and record blend temperature (Tb) and flow rate. Has flow rate fallen significantly or fallen below minimum flow specification ? Check and clean checkvalves, strainers and outlets. Yes Measure and record blend temperature (Tb) and flow rate. No Has flow rate improved ? Yes No Carry out a Performance Check. Refer to the Commissioning Procedure.
Filters - Exposed Models To clean or replace the inlet filters: 1. Isolate the hot and cold water supplies. 2. Operate the Flow Lever to drain any residual water. 3. Remove the Elbow Shrouds. 4. Unscrew the Filter Caps with the ‘O’ key (supplied) or a 12 mm hexagonal key. ‘O’ Key 5. Remove the Elbow Retaining Clips. 6. Carefully pull out the Inlet Filters. 7. Clean each filter in turn under a jet of water to remove any lodged particles. 8. Refit the Inlet Filters. 9.
Filters - Built-in Models To clean or replace the inlet filters: Note! Refer to the section ‘Installation, Control Assembly’ for illustrations. 1. Isolate the hot and cold water supplies. 2. Operate the Flow Lever and Temperature Knob to drain any residual water. 3. Rotate the Temperature Control Knob fully ‘O’ Key clockwise and carefully pull it off.
TYPE 2 VALVES Application The approved designations for Type 2 valves are as follows: Model Designation Code Mira Discovery HP-S / LP-S The permitted application details are: Designation Operating Pressure Range Application Mixed Water Temperature† °C HP-S High Pressure Shower 41 °C maximum LP-S Low Pressure Shower 41 °C maximum Mixed water temperature at discharge point.
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SPARE PARTS Exposed Thermostatic Shower Control 090 95 1595 036 1595 037 1595 038 1595 039 1595 040 1595 041 1595 042 1595 043 1595 045 1595 047 1595 048 1595 065 1595 231 1595 232 Pipe Concealing Plates Temperature Hub Assembly Handle Pack Handle Adapter Pack Cartridge Assembly Pack Body Trim Elbow Shroud Pack (Identified ‘A’) Elbow Pack Assembly (Identified ‘B’) Mounting Assembly Pack Outlet Nipple Pack Seal Pack (Identified ‘C’) Component Pack Filter (2 off) ‘O’ Key 24 mm Spanner 090 95 B 1595 065 159
Built-in Thermostatic Shower Control 1595 036 1595 037 1595 038 1595 039 1595 044 1595 046 1595 066 1595 067 1595 070 1595 149 1595 150 1595 231 Temperature Hub Assembly Handle Pack Handle Adapter Pack Cartridge Assembly Pack Concealing Plate Assembly Seal Pack (Identified ‘A’) Filter Pack Screw Pack (Identified ‘B’) Component Pack Outlet Nipple Pack Elbow Pack ‘O’ Key 1595 149 B 1595 066 A 1595 150 A B A 1595 039 B 1595 066 A 1595 038 1595 036 1595 150 1595 044 1595 039 1595 231 1595 037 1595 0
CUSTOMER SERVICE UKAS P4924_5 40 © Kohler Mira Limited, May 2006
