Summary of Contents for Meynell V8/3
- Page 1 V8/3 THERMOSTATIC MIXING VALVE PRODUCT MANUAL IMPORTANT Installer: This Manual is the property of the customer and must be retained with the product for maintenance and operational purposes.
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Page 2: Table Of Contents
CONTENTS Safety : Warnings ..................3 Advice ....................... 3 Description ....................4 Pack Contents ..................5 Dimensions ....................7 Specifications ..................8 Installation Requirements ..............10 Installation ..................... 12 General .................... Reverse Outlet Connector ..............3 . Exposed Models ................4 . -
Page 3: Safety : Warnings
SAFETy : WARNINGS The function of a thermostatic mixing valve is to deliver water consistently at a safe temperature. This requires that: It is installed, commissioned, operated and maintained in accordance with the recommendations given in this manual. Type and 3 valves are only used for applications covered by their approved designations. -
Page 4: Description
INTRODUCTION The Meynell V8/3 is a Thermostatic Mixing Valve specified to meet the highest standards of safety, and reliability as demanded by today’s users. All Meynell products are designed, manufactured and supported in accordance with accredited BS EN ISO 900: 000 Quality Systems. -
Page 5: Pack Contents
Tick the appropriate boxes to familiarize yourself with the part names and to confirm that the parts are included. Exposed Models x V8/3 x Hexagonal Key 3 x Fixing Screws x Olive x V8/3 L x Compression Nut Documentation x NHS Requirements Booklet x V8/3 K... - Page 6 Built-in Models x V8/3 B x Hexagonal Key 3 x Fixing Screws x V8/3 BL x Foam Seal x Concealing Plate x Rubber Grommet Documentation x NHS Requirements Booklet...
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Page 7: Dimensions
DIMENSIONS Exposed Model 60 mm .5 mm 30 mm Centres 35 mm Built-in Model 55 mm MAX 6 mm 35 mm MIN 35 mm 4 mm .5 mm... -
Page 8: Specifications
SPECIFICATIONS Normal Operating Conditions are considered as: • inlet maintained pressures are nominally balanced • daily usage -6 hours • installation and usage environment not subject to extremes of temperature, unauthorised tampering or wilful abuse. Operating Parameters For Type 2 and 3 valves the supply conditions specified in section: ‘Type 2 and Type 3 Valves, Application’... - Page 9 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).
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Page 10: Installation Requirements
Mixing Valve Tempering Valve Overflow Indicator Mini Expansion Vessel Pressure Reducing Valve The Meynell V8/3 Thermostatic Mixing Valve is compatible with the following systems: Gravity fed system The Mixing Valve MUST be fed from a cold water cistern and hot water cylinder providing nominally equal pressure. - Page 11 Unvented mains pressure system The Mixing Valve can be installed with a unvented, stored hot water cylinder. Mains pressurised instantaneous hot water system (thermal store) The Mixing Valve can be installed with systems of this type with balanced pressures. Pumped system The Mixing Valve can be installed with an inlet pump (twin impeller). The pump must be installed on the floor next to the hot...
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Page 12: Installation
INSTALLATION General Installation must be carried out in accordance with these instructions, and must be conducted by designated, qualified and competent personnel. Before commencing, make sure that the installation conditions comply with the information given in section: ‘Specifications’. For Type and 3 valves see also Installation conditions in section: ‘Type 2 and Type 3 Valves’. -
Page 13: Reverse Outlet Connector
10. Decide on a suitable position for the Mixing Valve. The position of the Mixing Valve and the Shower Fittings must provide a minimum gap of 5 mm between the spill-over level of Hose Retaining Ring the shower tray/bath and the handset. This is to prevent back-siphonage. -
Page 14: Exposed Models
1. Exposed Models Wall Plugs 1.1 Decide on a suitable position for the (not supplied) Thermostatic Mixing Valve where all users can operate it. 1.2 Remove the Wall Bracket from the rear of the Mixer Valve Body by loosening the Wall Bracket Grubscrew with a 2.5 mm hexagonal key (supplied). -
Page 15: Built-In Models
2. Built-in Models 2.1 Decide on a suitable position for the Thermostatic Mixing Valve where all users can operate it. Outlet 2.2 Determine the routes of the incoming hot and cold supply pipework. They can be rising or falling supplies. 2.3 Determine the route for the outlet pipework. - Page 16 2.11 Plaster and tile up to the Thermostatic Foam Seal Mixing Valve, leaving a maximum diameter hole around the Mixing Valve Concealing of 5 mm. Plate 2.12 Fit the Sealing Grommet to the inner diameter of the Concealing Plate. Remove the protective backing from one side of the Foam Washer and fix to rear of the Concealing Plate.
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Page 17: Commissioning
Note! Causing thermal shutdown of the Meynell V8/3 by full closure of the cold supply may not adequately indicate the practical capability of the Meynell V8/3, nor its service condition. Consequently this is not a recommended performance check,... -
Page 18: Maximum Temperature
The maximum blend temperature obtainable by the user should be limited, to prevent accidental selection of a temperature that is too hot. The Meynell V8/3 is fully performance tested, and the maximum temperature is preset to approximately 4°C under ideal installation conditions at the factory. -
Page 19: Operation
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 Preset Maximum Temperature... -
Page 20: Fault Diagnosis
FAULT DIAGNOSIS Symptom Cause/Rectification Only hot or cold a. Inlet supplies reversed (hot supply to cold supply). water from mixer No hot water reaching mixer. outlet. c. Check strainers and inlet/outlet fittings for blockage. Installation conditions continuously outside operating parameters, refer to section: ‘Specifications’ and 2.e below. F l u c t u a t i n g o r Normal function of the thermostatic control when operating r e d u c e d f l o w conditions are unsatisfactory. -
Page 21: Maintenance
The maintenance of this product must be carried out in accordance with the instructions given in this manual, and must be conducted by designated, qualified and competent personnel. Meynell products are precision-engineered and should give continued superior and safe performance, provided: • They are installed, commissioned, operated and maintained in accordance with the recommendations stated in this product manual. -
Page 22: Planned Maintenance
PLANNED MAINTENANCE Malfunction of the valve is almost always progressive in nature and will be detected by the use of proper temperature checking and maintenance routines. Certain types of system can result in the valve having excessive ‘dead-legs’ of pipework, or auxiliary cold water supply added to the mixed water from the mixing valve. -
Page 23: Checkvalves And Filters
Maintenance personnel should also make sure that the staff are aware of the importance of reporting temperature variations and when detected, these should be recorded in the Log Book. Commercial Check for correct blend setting every 6 months. Follow the procedure detailed in the flow diagram “In-service Test Procedure”, every months. Checkvalves and Filters Isolate the supplies to the valve and operate the valve to release pressure and to assist the draining of residual water. - Page 24 Start Measure and record supply temperatures and pressures. Make sure that they are within Valve specifications. Measure and record blend temperature (Tb) and flow rate. Has flow rate fallen Check and clean checkvalves, significantly or fallen strainers and outlet. below minimum flow specification? Measure and record blend temperature...
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Page 25: Type 2 And Type 3 Valves
TyPE 2 AND TyPE 3 VALVES Application The approved designations for Type Valves are as follows: Model Designation Meynell V8/3 HP-S, HP-W, LP-S, LP-W The permitted application details are: Designation Operating Application Mixed Water Pressure Range Temperature†°C -HP-S High Pressure Shower 4°C maximum... -
Page 26: Installation Conditions
In order to achieve the safe water temperatures expected of a Type 3 valve it is essential that the valve is used only for the applications covered by its approved designations, with the appropriate water supply pressures and temperatures, and it is commissioned, maintained and serviced in accordance with the recommendations contained in this guide. -
Page 27: Maintenance
Adjust the temperature of the mixed water in accordance with the instructions in this manual and the requirement of the application and then carry out the following sequence: record the temperature, and pressures if possible, of the hot and cold water supplies. -
Page 28: Spare Parts
SPARE PARTS SPKB0016P Control Knob (Stub Lever) SPLR0012P Control Knob (Long Lever) SPSL0006J Cartridge Sleeve Assembly - Components identified 1 SPPE0007P Concealing Plate (Chrome) SPSK0319.1J V8 Seal Kit - Components identified ‘A’ 147.48 Non Return Valve (Lockshield Only) - Not Illustrated 457.04 Bezel 55.84 Lockshield Knob 55.85 Backplate 55.86 Inlet Elbow Pack 1551.187 Inlet Connector Pack (B model) 1551.188 Outlet Connector Pack - Components identified ‘B’... - Page 29 55.84 SPKB006P SPLR00P 457.04 55.85 55.87 55.86 SPPE007P...
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Page 30: Notes
NOTES... - Page 31 NOTES...
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Page 32: Customer Care
CUSTOMER CARE UKAS 1063915-W2-B (Z18A) © Kohler Mira Limited, March 007...
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