Installation and User Guide MIxInG ValVe PressUre
Contents
1. 2 Rear Inlet Supplies 2 1 2 2 2 3 2 4 2 5 2 6 Refer to section Rising and Falling Inlet Supplies and follow instructions 1 2 to 1 5 Using a spirit level mark the route of incoming hot and cold water supply pipes at 153 mm centres Remove the plaster and brickwork to the required depth to conceal the supply pipework Note Depth must be sufficient to prevent pipe Concealing Plates fouling on the plumbing elbows Install the hot and cold water supply pipework make sure that the pipe ends emerge from the wall surface at 153 mm centres and project from the finished wall surface by 13 mm Allow for two circular recesses measuring 32 mm diameter x 10 mm depth to allow for the two pipework Concealing Plates Finish the wall surface Fit the pipework concealing plates over hot and cold water supply pipework Fit the Fibre Gasket against the shoulder of the Connector Nipple and screw into the Inlet Elbow Make sure that the compression taper faces uppermost and tighten using a 12 mm hexagon wrench not supplied 16 A Concealing Plate Backplate Circular Recess finished wall 13 mm from surface E il 32 mm Elbow 10 mm minimum between elbow and finished wall surface BSP Bag 15mm Fibre Compression V s Male2. 3 Remove the two shroud retaining screws and the cover shroud Note the position of the adjustable temperature stop then remove Remove the hub 4 Undo the four cover retaining screws and remove the cover A quantity of water will be discharged 5 Pull the pressure balancing cartridge from the shower control body 6 Identify which is the hot inlet of the shower control and fit the new cartridge accordingly The inlets on the new cartridge are marked H for Hot C for Cold O Seal Adjustable Cover Retaining Temperature Stop Cover Shroud Retaining Screws Washer Plastic Override Stop Control Knob we Retaining Screw Concealing Cap 40 10 11 12 13 14 Push the cartridge fully into the shower control body Make sure that the two plastic pins locate in the brass body recess Note Make sure that the arrow on the end face of the cartridge points to the letter C Important Make sure that the two inlet seals are well lubricated and correctly located before refitting the cartridge Make sure that the cover O seal is correctly located on the cover Refit the cover and secure with the four cover retaining screws Make sure that the flat on the spindle is lowermost Note There is a one way cartridge location feature on the cover which ensures the cover is correctly fitted Arrow Flat On Spindle End View Of Cartridge Push the hub onto the spindle Turn on
3. Gasket np Fibre Gasket Connector Nipple 2 7 2 8 2 9 Fit the Compression Nuts and Olives onto the pipework Note To eliminate pipe debris it is essential that supply pipes are thoroughly flushed through before final connection Locate the Shower Control Body onto the Backplate and inlet supply pipework and secure with the two recessed grub screws using the 2 5 mm hexagon wrench supplied Tighten the Compression Nuts using a suitable spanner Caution Use a cloth to protect the plated surfaces 2 10Turn on the water supplies and check for leaks 2 11 Fit the O seal to the tapered end of the outlet nipple and screw it into the shower control outlet using a 12 mm hexagon wrench not supplied This will leave the flat face for connection to the shower hose 2 12Refer to Commissioning 17 IO Seal IO Seal Connector Nipple Mira CombiForce 415B Built in Shower Control The built in shower control incorporates an integral wall mounting bracket assembly Wall which can be used to install the shower Mounting into a solid dry lined stud partition or dry a Z Bracket partition wall structure shower cubicle or laminated panel Installers may wish to consider other options such as fabricating rear supports using wooden noggins however these methods of fixing are beyond the scope of this guide The building in depth for the
4. enable you to cover repair bills for the life of your policy excludes Eire Ring 01922 471763 for more details Mira is a registered trade mark of Kohler Mira Limited The company reserves the right to alter product specifications without notice 1059386 W2 D 1542 Helpdesk Service Our dedicated Customer Services Team is comprehensively trained and can offer help and advice spare parts accessories or a service visit We will need you to have your model name or number power rating if applicable and date of purchase As part of our quality and training programme calls may be recorded or monitored Mira Showers Website www mirashowers co uk From our website you can register your guarantee download additional user guides diagnose faults purchase our full range of accessories and popular spares refer to our FAQ s and request a service visit Spares and Accessories We maintain extensive stocks of genuine spares and accessories and aim to provide support throughout the product s expected life Payment can be made by phone at time of order using most major Credit or Debit cards and we aim to despatch orders within two working days Items purchased from us are guaranteed for 12 months from date of purchase For safety reasons spares exposed to mains voltages should only be fitted by competent persons Returns items can be returned within one month of date of purchase providing that they are in good condition and the pac
5. Contact the local water supplier or increase supply pipe size to premises Refer to heater appliance instructions Open valve Wait until reheated Check and clean inlet strainers Shower starts warm and then runs cool a Insufficient flow rate b Hot water supply temperature dropped Refer to Wide temperature fluctuations Wait for hot water to reheat Shower control cannot be shut off No flow or low flow from shower head a Pipework not flushed before connecting shower control Internal O seals damaged b Cartridge or inlet strainer O seals damaged a Supply stop valve turned down or off b Inlet Strainers blocked c Hose or handset blocked d Spray plate blocked Renew cartridge Refer to the section Maintenance Cartridge Renewal Renew O seals with Service Pack Open valve Clean or renew Clear blockage If necessary renew hose or handset Remove and clean MAINTENANCE Mira products are precision engineered to provide satisfactory performance provided they are installed and operated in accordance with the recommendations contained in this guide The shower control is designed for the minimum of maintenance in normal domestic use If a malfunction occurs then this will probably necessitate a complete cartridge replacement Important The cartridge contains no internally serviceable parts W
6. Open valve Wait until reheated Check and clean inlet strainers Refer to Wide temperature fluctuations Wait for hot water to reheat Shower control cannot be shut off No flow or low flow from shower head a Pipework not flushed before connecting shower control Internal OC seals damaged b Cartridge or inlet strainer O seals damaged a Supply stop valve turned down or off b Inlet Strainers blocked c Hose or handset blocked d Spray plate blocked Renew cartridge Refer to the section Maintenance Cartridge Renewal Renew O seals with Service Pack Open valve Clean or renew Clear blockage If necessary renew hose or handset Remove and clean Installer Fault Diagnosis refer to appliance diagram and customer fault diagnosis Read the section Important Safety Information first Providing the shower has been correctly installed and is operated in accordance with the instructions contained in this guide difficulties should not arise If any maintenance is required then it must be carried out by a competent tradesperson for whom the fault diagnosis chart and maintenance instructions are provided To work on gas heater appliances an installer MUST be CORGI registered Before replacing any parts ensure that the underlying cause of the malfunction has been resolved Key for applicability column A Instantaneous gas hea
7. Isolating valves must be installed close to the Shower Control for ease of maintenance Pipework must be rigidly supported and avoid any strain on the connections Pipework dead legs should be kept to a minimum Supply pipework layout should be arranged to minimise the effect of other outlet usage upon the dynamic pressures at the valve inlets Inlet and outlet threaded joint connections should be made with PTFE tape or liquid sealant Do not use oil based non setting joint compounds To eliminate pipe debris it is essential that supply pipes are thoroughly flushed through before final connection All pipework must be checked for leaks before the product installation is completed The product should be pressurised amp the inlet amp outlet connections inspected 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 Hose handset This is to prevent back siphonage Retaining Ring For further information on the installation of your shower fittings refer to the Fittings Installation and User Guide Note No form of outlet flow control should be fitted only use shower fittings snika iaia recommended by the manufacturer or S LT supplier Layout and sizing of pipework must be such that when other services are used pressures at the shower control inlets do not fall below the rec
8. O seal and retaining bush into the cover 6 Check the cover O seal for signs of damage and renew if necessary 7 Follow instructions 8 to 14 in section Maintenance Cartridge Renewal to reassemble the shower control Inlet Strainer Unit O Seal Cover O Seal O O Seal Cartridge Retaining Bush O Seal Cover Retaining Screws 42 Inlet Strainer Cleaning Should the inlet strainer units require cleaning or renewal then follow the procedure below Important Use only silicone based lubricants when reassembling 1 2 3 Follow instructions 1 to 5 in section Maintenance Cartridge Renewal to dismantle the shower control Pull the inlet strainer units from the valve body Clean the complete strainer unit under running water Check for damage and renew the whole unit if necessary Refit the strainer units The strainer units can only be fitted one way refer to illustration Important Make sure that the O seals on the inlet strainers are well lubricated before refitting Follow instructions 7 to 14 in section Maintenance Cartridge Renewal to reassemble the shower control Inlet Strainer Unit Cover O Seal Cover Cartridge Cover Retaining Screws 43 ACCESSORIES DCV H An outlet double check valve requiring a minimum inlet supply pressure of 0 5 bar which has been designed to prevent the backflow or backsiphonage of potentially contaminated wa
9. all normal requirements and will minimize the deposition of scale in hard water areas Connections Inlet 15 mm Compression or BSP male CombiForce 415 15 mm Compression CombiForce 415B Outlet 1 BSP male CombiForce 415 15 mm Compression or BSP male CombiForce 415B INSTALLATION REQUIREMENTS Key to symbols Te Float operated valve Q Twin impeller inlet pump Gi Stop or servicing valve Ka Tempering valve O Shower control dl Mini expansion vessel i i Non return Val Warning or overflow pipe D on return Valve lt 1 Drop tight pressure reducing valve PRV Note The Shower Control is compatible with the following installations 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 However it is possible following installation of a flow regulator SC that the flow rate is reduced too much O for the boiler to ignite If this is the case j remove the flow regulator Wei D Unvented mains pressure system E 9 e The shower can be installed with a Sox unvented stored hot water cylinder ee ol 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
10. at the bottom the control knob retaining screw plastic override stop and the concealing cap 4 Check the maximum temperature Adjust if necessary refer to Commissioning 5 Turn the knob fully clockwise to the shut off position 6 This completes the procedure for Reversed Inlet Supplies Hub Skid Washer Control Knob Plastic Override Stop Control Knob Retaining Screw Concealing Cap 26 COMMISSIONING All heater appliances must have a fully modulating heat output for the domestic hot water to provide a constant temperature of hot water to the Mira CombiForce 415 shower control Multipoint Gas Water Heaters These notes are based on a heater with an effective output power of 23 5 kW Heaters with higher or lower effective output powers will proportionally affect the following information The Mira CombiForce 415 range does not compensate for water temperature changes 1 2 Use the heater appliance on a high or winter setting only A minimum maintained water supply pressure of 1 5 bar is required to the water heater This allows for a 0 5 bar pressure loss in the heater and ensures the maintained inlet pressure at the shower is above 1 bar The maintained water supply pressure should not exceed 5 bar A pressure reducing valve will be needed for pressures over 5 bar to improve the system operation It should be installed to reduce both the cold feed pressure to the heater and the cold fee
11. for pressures over 5 bar to improve the system operation It should be installed to reduce both the cold feed pressure to the heater appliance and the cold feed pressure to the Mira CombiForce 415 to approximately 3 5 bar Additional benefits may be obtained by fitting the water pressure reducing valve after the premises internal stop valve drain valve and if fitted outside tap The valve should be correctly sized for the duty 6 The minimum maintained water supply pressure will need to be raised if the minimum heater output power is greater than 7 5 kW on a reducing flow with a hot temperature of 62 5 C Adjustable Maximum Temperature Setting Mira CombiForce 415 shower controls are fully performance tested The adjustable maximum temperature maximum angular movement prior to override has been preset under ideal installation conditions at the factory Site conditions and personal preference may dictate that the maximum temperature needs to be reset To reset the adjustable maximum temperature stop ensure that an adequate supply of hot water is available in excess of that required from the shower control Turn the control knob fully anticlockwise Check the temperature at the discharge point allow hot water to reach the shower If incorrect adjust the temperature as follows 1 Turn the control knob anticlockwise until the desired maximum temperature is achieved It may be necessary to press the override button and continue to rotate
12. maximum incorrectly set temperature b Heater not set on Consult heater maximum hot instructions or contact a CORGI registered installer c Flow rate still too Fit 9 l min flow regulator high between shower control and hose Wide temperature a Insufficient flow Check and clean inlet fluctuations from rate causing the strainers shower when no heater to cycle on other draw off is and off being made b Insufficient water Contact your local water pressure causing supplier ora CORGI the heater to registered installer cycle on and off c Heater not fully Contact a CORGI modulating registered installer See Installation Requirements d See also Shower insufficiently hot Malfuncation Shower pattern col lapses when another hot tap is turned on a The heater is not capable of supplying several outlets at the same time b Inlet strainer blocked Reduce the simultaneous demand Check and clean inlet strainers Shower pattern collapses when another cold tap is turned on a Property water supply pipe partially blocked or undersized b Property stop or servicing valve not fully open c Insufficient mains cold water pressure d Inlet strainer blocked Contact the local water supplier or your installer Open valve Contact the local water supplier or your installer Check and clean inlet strainers Shower contro
13. the water supplies and check for any leaks Refit the adjustable temperature stop in its original position Temporarily fit the control knob with the override button at the bottom Rotate the control knob anticlockwise until the desired temperature is achieved Note the final position of the override button e g 11 O clock Rotate the control knob to the off position The maximum temperature will now require resetting refer to section Commissioning Adjustable Maximum Temperature Setting 41 O Seal Inlet Strainer Renewal Should the O seals require renewing then follow the procedure below Important Use only silicone based lubricants when reassembling 1 Follow instructions 1 to 5 in section Maintenance Cartridge Renewal to dismantle the shower control 2 Check the O seals on the cartridge hot and cold inlets for any signs of damage and renew if necessary 3 Remove the inlet strainers and check for damage renew if necessary Follow instructions 2 to 4 in section Maintenance Inlet Strainer Cleaning 4 Push the cartridge fully into the shower control body Make sure that the two plastic pins locate in the brass body recess Important Make sure that the two inlet seals are well lubricated and correctly located before refitting the cartridge 5 Check the cartridge spindle O seal fitted in the cover for signs of damage and renew if necessary Fit the spindle
14. to conceal the flanges of the integral wall mounting bracket assembly into the front face of the wall surface then cover over the fixings with plaster and tiles The building in depth for the integral wall mounting bracket assembly is 58 mm The thickness of plaster and tiles which conceal the integral wall mounting bracket assembly flanges must be between 6 and 23 mm 2 1 1 Follow the shower control installation Wall procedure as for Solid Dry lined GE Stud partition or Dry Partition Wall Structures instructions 1 1 to 1 4 inclusive 2 1 2 Cut a circular hole in the panel measuring 145 mm in diameter 2 1 3 Follow the shower control installation procedure as for Solid Dry lined Stud Partition or Dry Partition Wall Structures instructions 1 6 to 1 26 inclusive to complete the installation 23 2 2 Installation onto the Back Face of a Shower Cubicle or Laminated Panel The building in depth for the integral wall mounting bracket assembly is 58 mm The integral wall mounting bracket assembly can be used to install the shower control into a shower cubicle or laminated panel of between 4 and 21 mm The building in depth calculation must include the final thickness of plaster and tiles 2 2 1 Follow the shower control installation procedure as for Solid Dry lined Stud Partition or Dry Partition Wall Structures instructions 1 1 to 1 4 inclusive 2 2 2 Cut a circular hole in the panel measuring 124 mm in di
15. LI wO Seal LI Wu 2 Mira CombiForce 415B Built in Shower Control 1 x CombiForce 415 Shower 1 x Concealing Plate Circular Mounting Control with Building in Shroud L Bracket and Foam Seal L 1 x Control 1 x Outlet Nipple L 2x M4 x 16 mm Screws LI Gm came Knob Cap L 3 x Compression Nuts LI SS 2 x No 8 x 1 Fixing Screws LI eiert lagen O 2 x Wallpugs CO Ga Ga 3 x Olives LJ 1x O Seal LJ 2 x M4 x 30 mm Screws LJ 1 x 2 5 mm A F Hexagon Wrench E 1 x Foam Seal LI 3 Documentation 1 x Installation and User Guide LI 1 x Customer Support Brochure L Top Inlet Falling Supplies Back Inlet Supplies Bottom Inlet Rising Supplies Mira CombiForce 415 lt 132 A F gt 35 k 57 to 74 lt 163 gt Mira CombiForce 415B All dimensions are nominal and in millimetres SPECIFICATIONS Mira CombiForce 415 and 415B Pressures Minimum maintained pressure 1 bar Maximum maintained pressure 5 bar Maximum static pressure 10 bar Note For optimum performance the initial supply pressures should be nominally equal Temperatures Hot and cold water supply temperatures MUST remain relatively constant Maximum hot water temperature 85 C Ideally the hot water temperature should never exceed 65 C A water temperature of 60 C is considered sufficient to meet
16. aNC eiii icccscsssccentecccecccvas anaana nasarar naaid a taana aasa Rra 39 CIGANING EE 39 Component Interchangeability cee ceeeceeeeeseeeeeeeenneeeeeeeeneeeeeeeeaas 39 Cartridge enee giereg ee eege dE 40 Seal Inlet Strainer Henewal 42 Met Stainer Centre ce csesveteneeeneedeneduedeaee EE caveeneecenreedivee canes 43 E E 44 DEE Seege Eege ebe Eege EE 44 Mira COMBITOFCE 415 rmat a aaa 44 Mira CombiFOrce 415B E 46 Customer Servi ic oicnccecececstezecesdnsntves densi ceecetusateecseussecerstedecece Back Page INTRODUCTION Thank you for purchasing a quality Mira product To enjoy the full potential of your new product please take time to read this guide thoroughly having done so keep it handy for future reference The Mira CombiForce 415 is a pressure balanced shower control which maintains a constant outlet temperature irrespective of changes in inlet pressures as long as the inlet water temperatures remain the same Therefore inlet water temperatures and pressures especially the hot should be relatively constant in order to maintain a stable showering temperature The Mira CombiForce 415 can be installed with the following packages Fully modulating multipoint gas water heaters Fully modulating combination boilers Unvented mains pressure systems Mains pressurised instantaneous hot water heated from thermal store systems Pumped systems Showering temperature is adjusted by the shower control The flo
17. ameter 2 2 3 Using the wall mounting bracket as a template mark the position of the two smaller diameter fixing holes on the flanges of the bracket These should be at an angle of 45 2 2 4 Drill the two fixing holes 2 2 5 Fix the shower control to the wall mounting bracket using the two M4 x 16 mm screws provided 2 2 6 Feed the shower control through the opening in the panel and fix to the panel with the two M4 x 30 mm fixing SCrews 2 2 7 Follow the shower control installation procedure as for Solid Dry lined Stud Partition or Dry Partition Wall Structures instructions 1 11 to 1 26 inclusive to complete the installation 24 Reversed Outlet Connection Mira CombiForce 415 shower controls are supplied with inlet connections hot left cold right and bottom outlet The Mira CombiForce 415B is supplied with inlet connections hot left cold right and top outlet as standard To reverse the outlet position 1 Rotate the shower control body through 180 and install the shower control 2 Prise off the concealing cap unscrew the control knob retaining screw and remove the temperature override stop and control knob 3 Remove the D shaped hub fitted to the spindle Rotate the spindle one full turn 360 and refit the hub 4 Remove the adjustable temperature stop and turn over Make sure that the Max C with the indentations side is uppermost Adjust the maximum temperature stop refer to section Commissi
18. anticlockwise past the preset maximum temperature setting Note the final position of the button e g 11 O clock 2 Turn the control knob fully off Remove the concealing cap 4 Remove the control knob retaining screw plastic temperature override stop and pull off the control knob 5 Locate the adjustable temperature stop identified by a part number and a MAX C symbol or a MAX C symbol and component indentations Note Ensure that the original face identified is uppermost after adjustment 6 With reference to the diagrams carefully remove the adjustable temperature stop Reposition the stop so that the MAX C symbol is aligned with the noted button position e g 11 O clock 7 To check the desired maximum temperature setting has been correctly set refit the hub and control knob turn fully anticlockwise and check the temperature of the water at the outlet If still incorrect To increase the temperature reposition the stop one serration anticlockwise To decrease the temperature reposition the stop one serration clockwise Repeat the check as necessary Gei 28 Refit the control knob with the override button at the bottom control knob retaining screw plastic override stop and concealing cap Make sure that the plastic override stop is correctly seated Note Do not overtighten the control knob retaining screw Internal components may be damaged if the screw is overtightened This complet
19. crease supply pipe size to premises Open valve Contact the local water supplier or increase supply pipe size to premises Check and clean inlet strainers Shower control operating sequence is off hot cool Hot and cold water supplies have been connected in reverse Refer to the section Installation Reversed Inlet Supplies Shower insufficiently hot without pressing red button and rotating further Adjustable maximum temperature incorrectly set Refer to the section Commissioning Adjustable Maximum Temperature Setting Shower control drums whilst in use a Inlet strainer blocked creating an excessive imbalance in inlet pressures Supply pressure in excess of 5 bar maintained b Check and clean inlet strainers Fit pressure reducing valve Refer to Installation Requirements Shower control thumps when another tap is suddenly turned off Inlet check valve faulty a Remove cartridge and if possible clear check valve obstruction b Renew cartridge Malfunction Shower force too strong High pressure supplies Fit 9 Um flow regulator No hot water available a Heater appliance not igniting due to insufficient mains pressure b Heater appliance not igniting due to appliance fault c Product hot or cold isolating valve not fully open d Hot water run out e Inlet strainer blocked
20. d For installations with reversed hot and cold supplies complete the installation and refer to section Installation Reversed Inlet Supplies DO NOT overtighten grub screws as product damage may occur use hexagonal wrench provided and hand tighten only do not use power tools 1 Rising or Falling Inlet Supplies 1 1 Determine whether the hot or cold water services will be connected to the shower control from the bottom rising or from the top falling 1 2 Loosen the two Grub Screws with the 2 5 mm hexagonal wrench supplied and remove the Backplate from the Shower Control Rising Supplies Backplate 1 3 Mark the position of the two Backplate fixing holes on the finished wall surface using the Backplate as a template SEN Note Make sure that the two holes Fixing are vertical as illustrated Holes Warning Make sure there are no buried cables or pipes in the wall before drilling 1 4 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 Wall Plugs Fixing Screws 1 5 Secure the Backplate to the Wall with the Fixing Screws supplied 14 1 6 Loosen the two Grub Screws that retain the Inlet Elbows using the 2 5 mm hexagon wrench supplied and pull off the Inlet Elbows Note Make sure that the O Seal is correctly located on the smaller diameter should
21. d pressure to the Mira CombiForce 415 to approximately 3 5 bar Additional benefits may be obtained by fitting the pressure reducing valve after the premises internal stop valve drain valve and if fitted outside tap The valve should be correctly sized for the duty If the minimum modulating output of the heater appliance exceeds 14 kW with a reducing hot flow rate then the maintained minimum supply pressure will need to be increased This is to keep the flow rate through the heater sufficiently high in order to ensure that the gas flame stays ignited An extinguished flame will produce a cold shower after a short period of time Combination Boilers 1 2 3 This information is based on a heater appliance fitted with an internal flow regulator rated at 10 l min hot water Use the heater appliance on a high or winter setting only Should it not be possible to get a hot enough shower it may be necessary to fit a 9 l min flow regulator available from Kohler Mira Customer Services between the shower control and hose to further reduce the flow The top hat regulator should fit into the hose recess such that the black O seal is visible before attaching the hose to the shower control Aminimum maintained water supply pressure of 1 5 bar is required This allows for a 0 5 bar pressure loss in the heater 27 5 The maintained water supply pressure should not exceed 5 bar A pressure reducing valve will be needed
22. dard To change the position of the outlet refer to section Reversed Outlet Connection and complete instructions 1 to 8 1 4 Determine the route for the inlet and outlet pipework Note The outlet pipework to a flexible shower fitting is best positioned above and to one side of the shower control to prevent the hose from interfering with the Control Knob refer to illustration 19 1 5 1 6 1 7 1 8 1 9 Mark the wall surface for an opening measuring approximately 245 mm x 125 mm Mark the route of the incoming and outgoing pipework services Using the building in shroud as a guide remove the plaster and brickwork dry lining to the required depth of concealment Note The depth of concealment must be such that the final wall surface e g plaster and tiles etc finishes on the raised portion of the plastic building in shroud Mark the final position on the wall of the two larger outer diameter fixing holes in the flanges of the wall mounting bracket This bracket must be fixed at 45 Drill and suitably plug the two marked fixing holes Thoroughly flush the incoming hot and cold water supply pipes before connecting the shower control Fix the shower control to the wall mounting bracket using the two M4 x 16 mm screws provided 1 10Install the shower control aligning the two flange holes of the wall mounting bracket assembly with the pre drilled fixing holes Secure the showe
23. ed 30 OPERATION Mira CombiForce 415 shower has a single control knob which turns the shower control on off and adjusts the water temperature Turn the control knob anticlockwise to start the flow of water and clockwise to stop To increase the showering temperature turn the control anticlockwise and clockwise to decrease the water temperature Starting from the off position and turning the control knob anticlockwise the sequence is Off gt Cold water gt Warm water gt Preset maximum temperature 1 Initial anticlockwise movement turns the water on at full flow of cold water further anticlockwise movement increases the temperature The flow rate is determined by the supply pressures at the shower control inlets or by the effective output power of the heater appliance Flow rates for gas heater appliances can vary typically between 8 I min winter and 15 I min summer 2 The control knob is fitted with a button which allows you to override the maximum temperature stop This can be used when the initial hot water supply temperature has fallen due to increased demand or when a hotter shower is required The override mechanism self cancels when the knob is returned to the off position 3 Forsafety reasons this product is fitted with a adjustable maximum temperature stop This setting must be checked and adjusted as necessary to suit both site conditions and user s comfort Refer to section Commissioning Adjustable Maximum Temperat
24. er of the brass inlet connector and not in the V groove Fit the Shower Control Body onto the Backplate and secure with the two recessed grub screws using the 2 5 mm hexagon wrench supplied Refit and secure the elbows in the required position i e rising or falling supplies Note Make sure that the Grub Screws locate into the V groove Fit the Fibre Gasket against the shoulder of the Connector Nipple and screw into the Inlet Elbow Make sure that the compression taper faces uppermost and tighten using a 12 mm hexagon wrench not supplied 1 10Fit the Compression Nut Olive and pipework to the Inlet Connector Nipples Note To eliminate pipe debris it is essential that supply pipes are thoroughly flushed through before final connection 1 11 Tighten the Compression Nuts using a suitable spanner Caution Use a cloth to protect the plated surfaces 1 12Turn on the water supplies and check for leaks 1 13Fit the O seal to the tapered end of the outlet nipple and screw it into the shower control outlet using a 12 mm hexagon wrench not supplied This will leave the flat face for connection to the shower hose 1 14Refer to Commissioning 1 7 1 8 1 9 15 V Groove IO Seal Inlet Elbow Grub Screw Backplate Grub Screws Connector Nipple Fibre Gasket 15 mm Compression Fibre Gasket 2 Male BSP Compression Nut Oli SE ive WO
25. es the procedure for Commissioning Adjustable Maximum Temperature Setting Control Knob Control Knob Retaining Screw A RA 7 SG SS Plastic elle Override Temperature Stop Sto Override Button Concealing Cap Adjustable Temperature Indentations Stop re DC wy Ai K Kal Ei CN d 29 Temperature Override Button Disable The Mira CombiForce 415 incorporates a safety feature which prevents the temperature override button from being depressed enabling the user to access a higher shower temperature The shower control is despatched from the factory with the button in the enabled position The following sequence will allow the installer to disable the temperature override button if required Note By disabling the Temperature Overide the temperature control can be turned from FULL HOT to FULL COLD As such turning the control to full hot will deliver water at the hot water storage temperature 1 Make sure that the shower control is turned off and remove the concealing cap Locate the plastic temperature override stop Pull out the temperature override stop and reposition it in the slot adjacent to the red temperature override button 4 Reversing the above procedure will enable the temperature override button movement oN Temperature Override Button Temperature Override Stop Temperature Override Temperature Override Button Enabled Button Disabl
26. hen installed in very hard water areas above 200 p p m temporary hardness your installer may advise the installation of a water treatment device to reduce the effects of limescale formation in the heating appliance and spray plates Cleaning Many household cleaners contain abrasives 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 and then wiped dry using a soft cloth The light golden colour finish is softer than the chrome finish and its abrasive resistance much less When cleaning or using tools during maintenance extra care must be taken Component Interchangeability Some parts of the latest Mira CombiForce 415 are not interchangeable with earlier models of the Mira range Spare parts where different are available for earlier models Refer to the specific Installation Guide supplied with your shower or contact customer services for further information telephone and fax numbers can be found on the back cover of this guide 39 Cartridge Renewal Should the cartridge require renewal then the following procedure should be followed Important Use only silicone based lubricants when reassembling 1 Turn off the water supplies and open the shower control to relieve the trapped water pressure 2 Prise off the concealing cap remove the control knob retaining screw plastic override stop and the control knob
27. hould 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 Caution Read all of these instructions Retain this guide for later use Pass on this guide in the event of change of ownership of the installation site Follow all warnings cautions and instructions contained in this guide Anyone who may have difficulty understanding or operating the controls of any shower should be attended whilst showering Particular consideration should be given to the young the elderly the infirm or anyone inexperienced in the correct operation of the controls 6 When this product has reached the end of it s serviceable life it should be disposed of in a safe manner in accordance with current local authority recycling or waste disposal policy eo 4 PACK CONTENTS CHECKLIST W Tick the appropriate boxes to familiarise yourself with the part names and to confirm that the parts are included 1 Mira CombiForce 415 Surface Mounted Shower Control 1 x CombiForce 415 Shower Control L 2 x Pipe Concealing Plates E SS SS 2 x 14 BSP Inlet Connector Nipples E 2 x Fibre Gaskets L 2 x Olives L 2 x Compression Nuts L 1 x Outlet Nipple L Fee Gei Hexagon Wrench L mec zs 2x 131 Fixing Screws L 2x Wallplugs
28. integral wall mounting bracket assembly is 58 mm The building in depth for the shower control to the finished wall surface is between 64 and 81 mm The building in depth calculation must include the final thickness of plaster and tiles This dimension determines how much of the control knob will be visible through the concealing plate when the installation is completed A building in shroud is supplied which protects the shower control during plastering and provides a reference for the building in depth when chasing out the wall surface The built in shower control has 2 BSP male inlets and is supplied with 15 mm compression fittings The outlet has a LG BSP tapping and supplied with a nipple terminating in a 2 BSP male or 15 mm compression fitting Building in Shroud Raised Portion Hot Inlet Port Shower Outlet Port Control 18 1 Solid Dry lined Stud Partition or Dry Partition Wall Structures 1 1 Determine whether the hot or cold water services will be connected to the shower control from the bottom rising or from the top falling 1 2 Remove the plastic building in shroud The two M5 x 50 mm building in shroud retaining screws should be screwed temporarily into the base of the shower control for use later 1 3 Familiarise yourself with the hot and cold water inlet ports and outlet port The Mira CombiForce 415B is supplied with inlet connections hot left cold right and top outlet as stan
29. kaging is unopened Please obtain authorisation from our Customer Services Team before return We reserve the right to apply a 15 restocking charge Service Repairs We have a nationwide team of Service Technicians who can carry out all service or repair work to your product within the guarantee period and beyond You have the assurance of a fully trained Mira Technician genuine Mira spare parts and a 12 month guarantee on any chargeable work done Payment should be made directly to the Service Technician who will accept most major Credit or Debit cards To Contact Us UK Telephone 0844 571 5000 Mon to Fri 8 00 am 5 30 pm Sat 8 30 am 3 30 pm E mail technical mirashowers com Fax 01242 282595 By Post Mira Customer Services Dept Cromwell Road Cheltenham Gloucestershire GL52 5EP Eire Telephone 01 459 1344 Mon to Fri 9 00 am 5 00 pm E mail sales modernplant ie Fax Dublin 01 459 2329 By Post Modern Plant Ltd Dublin Otter House Naas Road Clondalkin Dublin 22 UKAS mira SHOWERS FM 14648 Kohler Mira Limited May 2010 QUALITY MANAGEMENT
30. l op erating sequence is off hot cool Hot and cold water supplies have been connected in reverse Refer to the section Installation Reversed Inlet Supplies Shower insufficiently hot without pressing red button and rotating further Adjustable maximum temperature incorrectly set Refer to the section Commissioning Adjustable Maximum Temperature Setting Shower control drums whilst in use a Inlet strainer blocked creating an excessive imbalance in inlet pressures b Supply pressure in excess of 5 bar maintained Check and clean inlet strainers Contact your installer Shower control thumps when another tap is suddenly turned off Inlet check valve faulty a Remove cartridge and if possible clear check valve obstruction b Renew cartridge Malfunction Shower force too strong No hot water available Shower starts warm and then runs cool High pressure supplies a Heater appliance not igniting due to insufficient mains pressure b Heater appliance not igniting due to appliance fault c Product hot or cold isolating valve not fully open d Hot water run out e Inlet strainer blocked a Insufficient flow rate b Hot water supply temperature dropped Fit 9 l m flow regulator Contact the local water supplier or a CORGI registered installer Contact a CORGI registered installer
31. mira Combiforce 415 R PRESSURE BALANCING MIXING VALVE Installation and User Guide These instructions are to be left with the user CONTENTS dee ET d TTT A E El CS 4 Pack Contents Checklist iocscci ccccsceccsscnnsacescnccesaeenenccesttnacceeceteseessaraszanecsse 5 DIMENSIONS TT 7 SPCCHICATI ONS sis icic cic ccceckves scepedectetis seve ceveactenaceessectnnccasedsnsenzcncetenesinedeaers care 8 Installation Requirements cccsseeeeeeceeeeeeeeeeeeeeeeaeeeneeeeeeeeeeeeeeeeeeeanes 9 UE E 12 GOMG NA ss eegen sed ergESgeredEESRNdedEE EENS EENS EE 12 Mira CombiForce 415 Surface Mounted Shower Control 14 1 Rising or Falling Inlet Supplies 14 2 Rear Inlet Supplies 16 Mira CombiForce 415B Built in Shower Control 18 1 Solid Dry lined Stud Partition or Dry Partition Wall Structures19 2 Shower Cubicle or Laminated Panel 23 Reversed Outlet Connection ssssssssssensreesrrnsrrnrrrnstnesternrnnnrnnnnnennees 25 Reversed Inlet Supplies A 26 COMMITS S Uu e WE 27 Multipoint Gas Water Heaters eana 27 Combination Boner wisi dicieancnssecivdesssnteedeteiscevearseivssisaecadtatieateadtaearse 27 Adjustable Maximum Temperature Gettmg 28 Temperature Override Button Disable nsssnosssessneernnnrnnereeseennnen 30 Ope ratio isis cececcteccccccsceessadssbecnseceas inate Aasiaan aaa a narra naa anaE riaan 31 Fault Diagnose uueeeERRREEEEEREESREEESEEEEREEEREERAEEEEESEEEEEEEESSEEEEEEERSEEEEEEEEEEE KEE 33 M intej
32. ommended minimum pressure balancing performance is impaired below 1 bar When fitted with some heater appliances the minimum maintained pressure may be above 1 bar refer to section Commissioning Multipoint gas water heaters or Combination boilers 25 mm Minimum 12 12 13 14 The Mira CombiForce 415 is not suitable for installation as part of a gravity fed plumbing system i e with a hot water cylinder and cold water storage cistern unless used with an inlet pump producing a maintained pressure of at least 1 bar When used with a fully modulating multipoint or combination boiler above 5 bar maintained pressure a pressure reducing valve will be necessary For information on measuring system pressures refer to section Installation Requirements Measuring System Pressures For further information on pressure reducing valves consult your local plumbing stockist If the shower control is to be used with a fully modulating multipoint water heater fully modulating combination boiler thermal store or unvented system an expansion vessel must be fitted to accommodate the expansion of water in the domestic hot water supply this may already be part of the system check the details on the boiler heater or contact the boiler heater manufacturer 13 Mira CombiForce 415 Surface Mounted Shower Control Note The Mira CombiForce 415 is supplied with inlet connections hot left cold right and bottom outlet as standar
33. oning 5 Refit the control knob assembly with the override button at the bottom and turn the knob fully clockwise to the shut off position 6 This completes the procedure for Reversed Outlet Connection Adjustable Temperature Stop Cover Shroud Cover Shroud Retaining Screws Control Knob Plastic Override Skid Washer The hub is D shaped This ensures the hub is fitted in the correct position Control Knob Concealing Retaining Screw Cap 25 Reversed Inlet Supplies Mira CombiForce 415 shower controls are supplied with inlet connections hot left cold right and bottom outlet The Mira CombiForce 415B is supplied with inlet connections hot left cold right and top outlet as standard Both shower controls are fitted with a single sequential control knob The shower control is turned off by turning the control knob fully clockwise The correct sequence of operation is anticlockwise movement of the control knob followed by Cold gt Warm gt Hot water If the sequence is Hot gt Warm gt Cold water then the hot and cold water supplies have been reversed To correct reversed hot and cold inlet supplies proceed as follows 1 Prise off the concealing cap remove the control knob retaining screw plastic temperature override stop and the control knob 2 Remove the hub Turn the spindle one full turn 360 Refit the hub 3 Refit the control knob with the override button
34. r control with the two No 8 x 11 4 fixing screws supplied 20 S COO Wall Mounting Bracket 1 11 Connect the incoming hot and cold water supply pipes 1 12Slide the compression nut then the olive over the pipe end If necessary sparingly smear liquid jointing on the pipe end and the outside of the olive 1 12Insert the pipe end into the opening of the inlet connector then slide the olive and compression nut into place 1 14Finally carefully tighten clockwise the compression nuts 1 15Connect the outlet pipe 1 16Place the O seal and foam seal on to the nipple as shown Locate the hexagon towards the shower control outlet port Screw the nipple clockwise into the outlet port using a 12 mm A F hexagon wrench not supplied 1 17Slide the compression nut then the olive over the pipe end If necessary sparingly smear liquid jointing on the pipe end 1 18Insert the pipe end into the opening of the outlet nipple then slide the olive and compression nut into place 1 19Finally carefully tighten the compression nut Turn on the water supplies and check the pipework for any leaks 1 20Refit the plastic building in shroud over the shower control and secure with the two M5 x 50 mm shroud retaining screws 21 Outlet Nipple Foam Seal IO Seal 1 21Plaster and tile up to the tapered sides of the plastic b
35. rature Stop Concealing Plate white Concealing Plate chrome Concealing Plate light golden Outlet Nipple 2 5 mm Hexagon Wrench CombiForce 415B Body including strainers Control Knob Assembly white Control Knob Assembly chrome Backplate Assembly components identified B Cartridge Assembly Inlet Compression Fitting Hub Pack CombiForce 415 Service Pack components identified A Screw Pack components identified C 46 119 85 47 CUSTOMER SERVICE Guarantee Your product has the benefit of our manufacturer s guarantee which starts from the date of purchase To activate this guarantee please return your completed registration card visit our website or free phone 0800 0731248 within 30 days of purchase UK only Within the guarantee period we will resolve defects in materials or workmanship free of charge by repairing or replacing parts or product as we may choose This guarantee is in addition to your statutory rights and is subject to the following conditions e The product must be installed and maintained in accordance with the instructions given in this user guide Servicing must only be undertaken by us or our appointed representative Note if a service visit is required the product must be fully installed and connected to services Repair under this guarantee does not extend the original expiry date The guarantee on any replacement parts or product ends at the original expi
36. ressure To measure maintained pressure refer to Illustration Connect the pressure testing device as above turn on the taps and the outlet from the device until a flow of around 5 I min is obtained this is easily done by timing the flow into a calibrated container The maintained pressure which can be expected when the shower is in operation can then be read This should be carried out on the hot and cold supply To measure pressure drop Pressure drop results from another draw off being turned on when the shower is in use Having checked the maintained pressure as above and with the device still discharging at approximately 5 I min turn on a second draw off from the same feed pipe This new reading will show the pressure drop and should be above the minimum maintained pressure recommended by the manufacturer Pressure Gauge Ball Valve Hose Type Tap Connector Pressure Testing Device 11 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 f 2 3 gi 10 11 Caution The shower must not be installed in an area where it may freeze For stud partitions alternative fixings not supplied may be required
37. ry date e For shower fittings or consumable items we reserve the right to supply replacement parts only The guarantee does not cover e Call out charges for non product faults such as damage or performance issues arising from incorrect installation improper use lack of maintenance build up of limescale frost damage corrosion system debris or blocked filters or where no fault has been found with the product e Water or electrical supply waste and isolation issues Compensation for loss of use of the product or consequential loss of any kind e Damage or defects caused if the product is repaired or modified by persons not authorised by us or our appointed representative e Routine maintenance or replacement parts to comply with the requirements of the TMV 2 or TMV 3 healthcare schemes What to do if something goes wrong If your product does not function correctly when you first use it contact your installer to check that it is installed and commissioned in accordance with the instructions in this manual Should this not resolve the issue contact our Customer Services Team who will offer you or your installer advice and if applicable arrange for a Service Technician to call If the performance of your product declines check in this manual to see if simple home maintenance is required If you require further assistance call our Customer Services Team Extended Guarantees A selection of protection plans are available that
38. ted showers B Unvented mains pressure showers C Mains pressurised instantaneous hot water heated from thermal store showers Malfunction Shower a Maximum Reset adjustable insufficiently hot temperature maximum incorrectly set temperature b Heater not set on Consult heater maximum hot instructions for further instructions c Flow rate still too Fit 9 l min flow regulator high between shower control and hose Wide temperature a Insufficient flow Check and clean inlet fluctuations from rate causing the strainers shower when no heater to cycle on other draw off is and off being made b Insufficient water Increase supply pipe pressure causing size to premises the heater to cycle on and off c Heater not fully Refer to Installation modulating Requirements d See also Shower insufficiently hot Malfunction Shower pattern collapses when another hot tap is turned on a The heater is not capable of supplying several outlets at the same time b Inlet strainer blocked Reduce the simultaneous demand Check and clean inlet strainers Shower pattern collapses when another cold tap is turned on a Property water supply pipe partially blocked or undersized b Property stop or servicing valve not fully open c Insufficient mains cold water pressure d Inlet strainer blocked Contact the local water supplier or in
39. ter through shower controls which are fitted with a flexible hose as part of the outlet shower fitting 9 litre min Outlet Flow Regulator Designed to limit the flow rate in high pressure installations If the maximum obtainable water temperature at the shower outlet is not sufficiently hot fitting a flow regulator may increase the outlet water temperature and may also reduce the shower force at the outlet refer to section Commissioning SPARE PARTS Mira Combiforce 415 012 12 Cover 242 55 Adjustable Temperature Stop 280 07 Inlet Compression Fitting chrome 280 15 Inlet Compression Fitting light golden 553 35 Outlet Nipple Assy chrome 553 54 Outlet Nipple Assy light golden 575 12 2 5 mm Hexagon Wrench 617 18 CombiForce 415 Body including strainers 617 20 Shroud Pack CombiForce 415 white 617 21 Shroud Pack CombiForce 415 chrome 617 22 Control Knob Assembly CombiForce 415 white 617 23 Control Knob Assembly CombiForce 415 chrome 617 29 Shroud Pack CombiForce 415 white light golden 802 27 Inlet Elbow Assembly chrome 802 33 Inlet Elbow Assembly light golden 902 55 Cartridge Assembly 932 25 Hub Pack 936 22 CombiForce 415 Service Pack components identified A 44 146 84 45 Mira CombiForce 415B 012 12 119 85 242 55 410 53 410 54 410 55 555 67 575 12 617 19 617 22 617 23 807 28 902 55 932 04 932 25 936 22 937 59 Cover Wall Mounting Bracket Adjustable Tempe
40. to be installed 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 30 60 Air Separation GH 10 ka Measuring System Pressures 1 General It is important that the system pressures are within the range specified for the Mira CombiForce 415 refer to section Specifications If the system pressure is not known then the system pressure MUST be measured as explained in this section Pressures are those present at the inlet to the appliance either whilst running maintained or in the off state static Nearby hot and cold taps connected to the same proposed feed pipes as the appliance can be used to measure the static pressure No other fitting or appliance should be in use at this time Water pressures vary throughout the day therefore you must make sure that water pressures do not drop below or exceed the minimum maximum required refer to section Specifications To measure static pressure refer to Illustration Connect the pressure testing device to a tap drawing from one of the proposed feed pipes With the outlet from the device in the off position turn on the tap and measure the static p
41. uilding in shroud and when set remove the shroud The two M5 shroud retaining screws should be screwed temporarily into the base of the shower control for use later 1 22Push the control knob cap on to the shower control knob 1 23Fit the foam seal over the reverse side of the circular mounting bracket 1 24Fix the circular mounting bracket to the shower control body using the two M5 x 50 mm screws used to retain the plastic building in shroud Note The bracket has been designed with semicircular knock outs which may need to be relieved to accommodate the supply pipework under minimum building in depth conditions 1 25Push the concealing plate firmly over the circular mounting bracket until it locates on the four clips 1 26This completes the installation of the Mira CombiForce 415B for installation into Solid Dry lined Stud Partition or Dry Partition Wall Structures Y N Plate 22 Control Knob Control Knob Cap S W Circular Mounting Bracket M5 x 50 mm Screw Concealing 2 Shower Cubicle or Laminated Panel The built in shower control incorporates an integral wall mounting bracket assembly which can be used to install the shower into the front or back face of a shower cubicle or laminated panel 2 1 Installation on to the Front Face of a Shower Cubicle or Laminated Panel Depending on the structure of the shower cubicle or laminated panel it may be possible
42. ure Setting How the pressure balancing principle operates Mira CombiForce 415 pressure balanced shower controls automatically adjust for variations in inlet pressures This will maintain a constant outlet temperature provided the inlet water temperatures remain stable The Mira CombiForce 415 is not a thermostatic shower control and does not sense supply temperature variations Therefore inlet water temperatures especially the hot must remain relatively constant Cold gt a D e Equal Hot and Cold Pressure Cold Water Pressure Loss The diaphragm is in the centre Diaphragm moves to close hot inlet Low Hot and High Cold Pressure High Hot and Low Cold Pressure Diaphragm deflects towards hot inlet Diaphragm deflects towards cold inlet and restricts cold entry and restricts hot entry 32 FAULT DIAGNOSIS Customer Fault Diagnosis The trouble shooting information tabled below gives details on what you can do as a user should you encounter difficulties whilst operating the shower Note Should these remedies prove to be unsuccessful in solving your problem contact your installer for further advice Key for applicability column A Instantaneous gas heated showers B Unvented mains pressure showers C Mains pressurised instantaneous hot water heated from thermal store showers Malfunction Shower a Maximum Reset adjustable insufficiently hot temperature
43. w rate is determined by the supply pressures available at the inlets and the output rating of the heater appliance Shower controls covered by this guide Mira CombiForce 415 Surface mounted pressure balanced shower control for connection to exposed pipework for high pressure applications 1 0 5 0 bar Available in white chrome white light golden or all chrome finish Mira CombiForce 415B Built in shower control for connection to concealed pipework for high pressure applications 1 0 5 0 bar Available in white white chrome white light golden or all chrome finish 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 Guarantee For domestic installations Mira Showers guarantee the Mira Combiforce 415 against any defect in materials or workmanship for a period of one year from the date of purchase shower fittings for one year For non domestic installations Mira Showers guarantee the Mira Combiforce 415 against any defect in materials or workmanship for a period of one year from the date of purchase For terms and conditions refer to the back cover of this guide Recommended Usage Application Valve only Kess SAFETY WARNINGS This Combiforce 415 Pressure Balanced Shower Control is precision engineered and s
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