V8/3 THERMOSTATIC SHOWER VALVE PRODUCT MANUAL INSTALLER Please leave manual with user for future reference to unit operation and maintenance. 1
INTRODUCTION Meynell mixing valves are manufactured within a BS : EN ISO 9001 accredited Quality System. DESCRIPTION The Meynell V8/3 range of thermostatic shower valves provide accurate temperature control and flow rates to single and multipoint* installations. *(Multipoint - use V8/3 Lockshield model only) With effect from June 1997 all relative Meynell mixers will have suffix 3 after the product name. This states that the mixer has been certified for use in UK Healthcare premises as a CLASS THREE VALVE meeting the requirements of the UK National Healthcare Services (NHS) Model Engineering Specification. Where this product is to be used in such an installation please refer to the NHS Requirements Booklet for detailed information on its application, commissioning and maintenance. SAFETY : WARNINGS Meynell products are precision engineered and should give continued safe and controlled performance, provided: 1. They are installed, commissioned, operated and maintained in accordance with manufacturers recommendations, and 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 the vigilance of supervisory staff 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. 2
CONTENTS CHECK Check the contents of the box are included before installation. Exposed Models 3
CONTENTS CHECK Check the contents of the box are included before installation. Recessed Models 4
INDEX SPECIFICATION Notes... 6 Normal Operating Conditions... 7 Operating Parameters: Pressures And Flow Rates... 7 Temperature Control... 8 Plumbing Connections... 8 Standards and Approvals... 8 Dimensions... 9 INSTALLATION REQUIREMENTS... 10 INSTALLATION General... 13 Shower Control Removal... 13 Reverse Outlet Connector... 14 Fixing to wall... 15 Recessed Fitting... 16 COMMISSIONING... 18 OPERATION... 19 FAULT FINDER... 20/21 MAINTENANCE... 22 SPARE PARTS... 23 CUSTOMER SUPPORT... Back Cover 5
Notes SPECIFICATION 1. The installation, commissioning and maintenance carried out in accordance with instructions supplied by the manufacturer, and must be conducted by designated, qualified and competentpersons. 2. Installations must comply with UK Water Regulations/Bye-laws (Scotland), Building Regulations or any particular regulations and practices, specified by the local water supplier. 3. Meynell products should give continued safe and controlled performance, provided: - installation, commission, operation and maintenance specifications are according to recommendations. - frequent attention given, as necessary, to maintain the product in good functional order. Guidelines supplied with product recommended by manufacturer. 4. Warning: Continued use of this product in operating conditions outside the limits listed can severely impair performance and reduce expected life, and can introduce inherent risks to end user. 6
Normal Operating Conditions Consider as: - inlet maintained pressures are nominally balanced - daily usage 1-6 hours - installation and usage environment not subject to extremes of temperature, unauthorised tampering or wilful abuse. Operating Parameters: Pressures And Flow Rates For optimum performance, maintained supply pressures should be nominally equal. Maximum Pressure Loss Ratio: 10:1 Minimum Maintained Pressure: 0.1 bar. (= 1 metre head from underside of cold tank to outlet of shower fitting) Maximum Static Pressure: 10 bar. 7
Temperature Control Minimum temperature differential between hot and outlet temperature: 10 C Optimum temperature control range: 35-45 C Maximum hot water temperature: 85 C (for safety, a recommended hot water storage temperature maintained below 85 C and for ablutionary installations at between 60 to 65 C). The performance specification outlined below is achieved with outlet blend temperature set between 35-45 C and supplies of 15 C cold and 65 C hot with nominally equal pressures. - Outlet blend temperature is maintained within 2 C with a 10 C change in hot or cold supply. - Thermostatic shut down to seepage within 2 seconds if cold supply fails. This is achieved only if the hot supply temperature is 10 C above the set outlet blend temperature. Plumbing Connections Inlet connectors are 15 mm compression Outlet connector is 1/2 BSP Male or 15 mm compression Hot (H) and Cold (C) inlets are clearly marked and must be connected this way. 8
Exposed model DIMENSIONS Recessed model 161 55 Max 35 Min 65 35 117 122.5 Dimensions in millimetres 9
INSTALLATION REQUIREMENTS Key to symbols Isolating valve Mixing Valve Overflow Pressure Reducing Valve Twin Impeller Pump Single Impeller Pump Tempering Valve Gravity Fed shower - The shower MUST be fed from a cold water cistern and hot water cylinder providing nominally equal pressure. 10
Gas heated shower - The shower MUST be installed with a gas water heater or combination boiler of a modulating design. A modulating boiler is one that the draw off rate is indirectly controlling the gas flow to the boiler, producing a relatively constant hot water temperature. Cold Hot Unvented mains pressure shower - The shower can be installed with a unvented, stored hot water cylinder. Only a competent person as defined by the Building Regulations may fit this type of system. 11
Mains pressurised instantaneous hot water shower - The shower installed with systems of this type is supplied hot water via a tempering valve, this provides relatively constant hot water and the shower will compensate for temperature changes should they occur. Pumped shower - 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. Ensure hot cylinder vent pipe is arranged as shown to enable air separation. 90º 30º-60º 12
General INSTALLATION Carry out installation according to instructions supplied, and must be conducted by designated, qualified and competent person. 1. Before starting installation, ensure that all site requirements correspond to information given in the SPECIFICATION section. 2. Do not install product in a position where it could become frozen. 3. The mixing valve should be installed in a position for easy access for maintenance. 4. Accessible isolating valves must be provided for maintenance. 5. The supply pipework must be thoroughly flushed to remove any debris before connection. Shower Control Removal 1. Insert 2.5 mm hexagon key supplied into side of shower control. 2. Loosen screw only to allow removal of shower control. 3. Refit in reverse order. For lockshield model. 1. As above. 2. To refit, ensure anti-rotation slots are engaged on lug on body (arrow). 13
Reverse Outlet Connector If shower outlet needs reversed (e.g. bottom outlet to top outlet): 1. Remove small cap (if fitted) 2. Using an 1/2 hexagon key remove sealing plug and outlet connector opposite. 3. Swap around and refit, if changing from flat connector to compression ensure o seal is changed around. 4. Refit in reverse. 14
Fixing to wall 1. Decide on a suitable position for mixer where all users can operate. The mixer and shower fitting position must provide a minimum of 25 mm between handset and bath/tray spill-over level. This is to prevent backsiphonage. 2. Remove wall bracket from rear of mixer by loosening grubscrew with hexagon key (supplied) on the underside of mixer. 3. Use bracket to mark 3 hole positions. Drill wall and insert suitable wall plugs (not supplied) for No.10 woodscrews. 4. Locate mixer on wall bracket and use hexagon key to tighten grubscrew. 15
Recessed Fitting 1. Determine the routes of the incoming hot and cold supply pipework. They can be rising or falling supplies. 2. Determine the route for the outlet pipework. When connecting shower kit to the outlet should be to the side and above the mixer to ensure flexi-hose hangs correctly and does not obstruct the shower control. The outlet can be sited on the right or on the left, as site dictates. Outlet 3. Mark suitable routes for inlet and outlet pipework. 4. Cut away plasterboard and brick work to a depth of between 60 mm to 80 mm. Depth should be 67 mm min / 87 mm max including finish wall thickness (tiles or facia board). 5. Fix mixer to wall (see Fixing to wall). 6. Make connections to mixer as shown to inlets and outlets. Hot Shower Cold 16
7. Plaster and tile up to shower, leaving a maximum diameter hole around shower of 125 mm. 8. Fit sealing grommet to inner diameter of concealing plate, remove protective backing from one side of foam washer and affix to rear of concealing plate. 9. Remove shower control (see earlier section), Try plate fitting on shower to ensure all rough edges are covered. 10. Remove plate, and peel the second protective backing from the foam washer and refit pushing equally on plate to ensure adhesive backing is fully sealing the perimeter of plate. 11. Refit shower control. 17
COMMISSIONING Commissioning must be carried out according to instructions supplied, and must be conducted by designated, qualified and competent person. 1. Loosen grubscrew in the side of shower control with 2.5 mm hexagon key supplied. 2. Turn shower control to maximum setting, (for lockshield model turn on seperate outlet device fitted eg. stopvalve). Let temperature stabilise. 3. Remove shower control completely. 4. If the temperature measured needs to be adjusted, insert the 2.5 mm hexagon key into the centre of valve head. Lockshield model 5. Turn the hexagon key anticlockwise to increase the temperature, or clockwise to decrease temperature. 6. Refit shower control and turn off mixer (on lockshield model turn off outlet device), reposition shower control with brand horizontal. 18
OPERATION Temperature selection (not lockshield model) The mixer has one control to set temperature and works in a sequence: Off! Cold! Tepid! Pre-set Maximum The temperature is indicated with numbers, lining the numbers with position mark on body selects a relative temperature from 0 to 7. 19
FAULT FINDER Symptom 1. Only hot or cold water from mixer outlet. 2. Fluctuating or reduced flow rate. 3. No flow rate from mixer outlet. 4. Blend temperature drift. 5. Maximum blend temperature setting too hot or too cold. Cause/Rectification a. Inlet supplies reversed (hot supply to cold supply). b. No hot water reaching mixer. c. Check strainers and inlet/outlet fittings for blockage. d. Installation conditions continuously outside operating parameters: refer to SPECIFICATION, and 2.e. below. Normal function of the thermostatic control when operating conditions are unsatisfactory; a. Check strainers and inlet/outlet fittings for 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 temperatures differentials are sufficient. e. (Subsequent to rectification of supply conditions) Check thermostatic performance; renew Piston Assembly if necessary. a. Check strainers and inlet/outlet fittings for blockage. b. Hot or cold supply failure. Indicates operating conditions changed. a. Refer to symptom 2. above. b. Hot supply temperature fluctuation. c. Supply pressures fluctuating. d. Seal damage or wear. Renew seals. a. Indicates incorrect maximum temperature setting; refer to COMMISSIONING section. b. As symptom 4. above. 20
Symptom 6. Water leaking from mixer body. 7. Flow rate too high or too low. Cause/Rectification Seal wear or damage. a. Obtain Seal Kit, renew all seals. a. (Too low) Refer to symptom 2.a-e. above. b. (Too low) Insufficient supply pressures. c. (Too high) Supply pressure too high. d. (Too high) Refer to symptom 2.a-e. above. 21
General MAINTENANCE Meynell products are precision engineered and should give continued safe and controlled performance, provided: 1. They are 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. Recommended guidelines are given below. Preventative/Precautionary Maintenance (Planned Maintenance Programmes) The frequency and extent of attention required will vary according to prevailing site and operational conditions however, the following guideline schedule is suggested to cover average duty and site conditions: Six-monthly Blend temperature: check for correct blend setting. Reset as necessary. Performance: check blend temperature against a known datum (relative COMMISSIONING procedure), by isolating cold water supply. Function: any in-line or integral check valves, strainers are clean and in good working order. Lubricants Important: Use silicone-only based lubricants. Do not use oil based or other lubricant types as rapid deterioration of seals may occur. Standard silicone-only based lubricants may be used on static seals and threads to assist refitting. 22
SPARE PARTS 1 SPSL0006J CARTRIDGE ASSEMBLY 2 SPPE0007P CONCEALING PLATE CHROME A SPSK0051J SEAL KIT 23
CUSTOMER SERVICE Guarantee This product is guaranteed against both faulty materials and manufacturing process for a period of one year from date of purchase, provided that the product has been installed correctly and used in accordance with the instructions in this manual. Any part found to be defective during the guarantee period will be replaced or repaired - at our option - without charge, provided that the product has been properly used and maintained. Routine cleaning and maintenance should be carried out in accordance with instructions supplied. The product should not be modified or dismantled except by a person authorised by Kohler Mira Ltd. Your statutory rights are not affected by this guarantee. Customer Service Policy If within the guarantee period the product does not function correctly, first check the fault finding analysis in the manual to see if the difficulty can be resolved. Failing this, please contact your installer to check that the product has been installed and commissioned in accordance with this manual. If the fault can not be resolved, please contact the Customer Service Department who will try to assist, or will arrange a local Service Engineer or Agent to call and arrange a visit. Within the guarantee period there will be no charge for parts or labour if the fault concerned is due to the product. However, the guarantee does not cover difficulties due to incorrect installation or misuse. During the service visit yourself or a responsible person should be present at all times. If the Service Engineer or Agent can not gain access at the prearranged time a callout charge may be made. Payment for the Service visit, if applicable, should be made direct to Service Engineer or Agent using Access, Visa or cheque supported by a banker s card. Spare Parts Functional spare parts are available for your products maintenance. Items can be identified from spares drawing inside manual, please contact Customer Service to confirm spare and details of a spares stockist for your area. Your product serial number or date mark (if available) may be useful to identify parts. Meynell Valves Cromwell Road Cheltenham Gloucestershire GL52 5EP Tel: 01242 262888 Fax: 01242 282595 P3291/1 Meynell is a registered trade mark of Kohler Mira Ltd. The company reserve the right to alter product specifications without notice. 24 BS EN ISO 9001 : 1994 Reg. No. FM 14648 Kohler Mira Ltd, November 2001