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Summary of Contents for MEGAFLO Eco Plus
- Page 1 Megaflo Eco Plus Unvented Indirect Hot Water Cylinders 400L, 500L & 570L Megaflo Eco Plus Product Guide...
- Page 2 Contents Product Specification ..................................Page 3 Installation and Commissioning Instructions ..........................Page 10 Maintenance and Servicing ................................Page 22 User Guide ......................................Page 29 Unvented Hot Water Cylinder...
- Page 3 • Introduction • Checklist • General Requirements • Water Supply • Power Supply • The Environment • Specification and Dimensions Unvented Hot Water Cylinder...
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Page 4: Component Checklist
Regulation Part L. The Megaflo Eco Plus unvented water heater can be fed directly from the cold water mains supply to the property without the need for separate feed cisterns or vent pipes. It is supplied complete with all its necessary inlet and safety controls, electric immersion heater(s) and, a cylinder thermostat, thermal cut-out and a 2-port motorised valve. -
Page 5: General Requirements
Storage and Handling Please take care when handling a packaged Megaflo Eco Plus. The unit is heavy and must only be moved manually within safe working practices. If the unit is to be stored before installation, it must be placed on a secure, level surface and in a dry, frost free environment. -
Page 6: Outlet/Terminal Fittings (Taps, Etc.)
The Megaflo Eco Plus can be used in conjunction with most types of terminal fittings. It is advantageous in many mixer showers to have balanced hot and cold water supplies, in these instances the balanced cold water supply should be teed off the supply to the Megaflo Eco Plus after the pressure reducing valve but before the pressure relief valve (See Figures 5 page 12). -
Page 7: Specifications And Dimensions
Specifications and Dimensions Outline Specifications Maximum mains water supply pressure (to 3.5 Bar Pressure Reducing Valve) 1.6 MPa (16 bar) Operating pressure (Pressure reducing valve set pressure – non adjustable) 0.35 MPa (3.5 bar) Pressure Relief Valve 0.8 MPa (8 bar) Temperature / Pressure Relief Valve set temp / pressure 90ºC / 1MPa (10 bar) Immersion heater rating (a.c. - Page 8 Figure 2 - Dimensions HOT OUTLET T&P VALVE SECONDARY RETURN THERMOSTATIC CONTROL (BOILER) 3kW IMMERSION PRIMARY FLOW PRIMARY RETURN COLD INLET Table 2: Cylinder sizes SIZE TYPE DIMENSIONS (mm) INDIRECT 400L 1502 1116 500L 1802 1132 1416 1611 570L 1997 1336 Table 3: Indirect coil ratings NOMINAL...
- Page 9 Figure 3 - Siting the unit Wall Min 600mm Min 600mm Direct Megaflo Eco Plus Supplier’s name or trade mark Supplier’s model identifier Storage volume V in litres 400.0 500.0 570.0 Mixed water at 40 °C V40 in litres Table 5: Cylinder weights...
- Page 10 Indirect Cylinder • General Installation • Commissioning Unvented Hot Water Cylinder...
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Page 11: General Installation
3.5 Bar Pressure Reducing Valve The 3.5 Bar Pressure Reducing Valve can be connected anywhere on the cold water mains supply prior to the Megaflo Eco Plus unit. There is no requirement to site it close to the unit, it can be located at a point where the mains supply enters the premises if this is more convenient but you must install a non-return valve just after the reducing valve for ease of maintenance. - Page 12 Figure 5 - Schematic Installation diagram using 3.5 bar pressure reducing valve in conjunction with 8 bar pressure relief valve Unvented Hot Water Cylinder...
- Page 13 Drain Tap A drain tap is supplied and should be installed in the cold water supply to the Megaflo Eco Plus unit between the 8 Bar Pressure Relief Valve and the heater at as low a level as possible (see Figure 1, page 5). It is recommended that the outlet point of the drain pipe work be at least 1 metre below the level of the heater (this can be achieved by attaching a hose pipe to the drain tap outlet spigot).
- Page 14 The following extract is taken from the latest G3 Regulations Discharge pipes from safety devices Discharge pipe D1 3.50 Safety devices such as temperature relief valves or combined temperature and pressure and pressure relief valves (see paragraphs 3.13 or 3.18) should discharge either directly or by way of a manifold via a short length of metal pipe (D1) to a tundish. 3.51 The diameter of discharge pipe (D1) should be not less than the nominal outlet size of the temperature relief valve.
- Page 15 Discharge Pipework It is a requirement of Building Regulations that any discharge from an unvented system is conveyed to where it is visible, but will not cause danger to persons in or about the building. The tundish and discharge pipes should be fitted in accordance with the requirements and guidance notes of Building Regulations.
- Page 16 Boiler Selection The Megaflo Eco Plus Indirect models are suitable for use with most gas or oil fired boilers compatible with unvented systems i.e. fitted with a temperature control thermostat and thermal cut-out. If in doubt consult the boiler manufacturer. Solid fuel boilers or any other boiler in which the energy input is not under effective thermostatic control, unless additional and appropriate safety measures are installed, SHOULD NOT be used.
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Page 17: High Limit Thermostat
Immersion Heater The Megaflo Eco Plus indirect units are supplied with an immersion heater which can be used as an alternative heat source should the boiler supply need to be isolated from the Megaflo Eco Plus unit. The immersion heater must be wired to the latest I.E.E. Wiring regulations... - Page 18 Figure 10 - 2 port valve in conjunction with a 3 port mid-position valve system (“Y” Plan) MEGAFLO ECO INDIRECT THERMAL CONTROLS MEGAFLO ECO (DHW) 2-PORT PROGRAMMER (SUPPLIED FITTED) VALVE (SUPPLIED) Bl Br G O GY BLUE BROWN GREY ORANGE...
- Page 19 Replace the immersion heater cover(s) before operating ensuring that the threaded edge clip is in position to provide a suitable thread for the cover screw. DO NOT OPERATE THE IMMERSION HEATER(S) UNTIL THE Megaflo Eco Plus HAS BEEN FILLED WITH WATER. Operation...
- Page 20 AUTO position. Vent any trapped air by opening the air bleed. Switch on the boiler, ensure the programmer is set to Domestic Hot Water. Allow the Megaflo Eco Plus unit to heat up and check that the indirect thermostat and 2-port motorised valve operate correctly.
- Page 21 • Maintenance • Fault Finding • Servicing • Spares • Benchmark • Spares stockists Unvented Hot Water Cylinder...
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Page 22: Maintenance
Attach a hosepipe to the drain cock having sufficient length to take water to a suitable discharge point below the level of the unit, at least one metre below the unit is recommended. Open hot water tap nearest to the Megaflo Eco Plus to relieve the system pressure. Open drain cock. If water fails to drain from the Megaflo Eco Plus vent the unit by manually opening the Temperature / Pressure Relief Valve. - Page 23 Spares Spare parts A full range of spare parts are available for the Megaflo Eco Plus range. Refer to the Technical Data label on the unit to identify the model installed and ensure the correct part is ordered. Description Part no.
- Page 24 Figure 15 - Spares schematic 95 605 103 95 607 690 95 612 650 95 611 810 95 602 030 95 612 026 Unvented Hot Water Cylinder...
- Page 25 The Fault Finding chart (Table 8) will enable operational faults to be identified and their possible causes rectified. Any work carried out on the Megaflo Eco Plus unvented water heater and its associated controls MUST be carried out by a competent installer for unvented water heating systems. In case of doubt contact the Megaflo Eco Plus Service Department , Section 4, page 36.
- Page 26 Unvented Hot Water Cylinder...
- Page 27 Unvented Hot Water Cylinder...
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Page 28: Spares Stockists
Spares Stockists Electric Water Heating Co. 2 Horsecroft Place Pinnacles Harlow Essex CM19 5BT Tel: 0845 0553811 E-Mail: sales@ewh.co.uk Special Product Division Units 9 & 10 Hexagon Business Centre Springfield Road Hayes Middlesex UB40 0TY Tel: 0208 5730574 Parts Center Network 65 Business Park Bentley Wood Way Burnley... - Page 29 • User Instructions • Guarantee • Customer Service Unvented Hot Water Cylinder...
- Page 30 Indirect units are fitted with an Indirect Thermostat which controls a 2-port motorised valve and hence the temperature of the water in the Megaflo Eco Plus unit. The thermostat is factory set to give a water storage temperature of approx. 60ºC, however it can be set to control between 10ºC and 70ºC, this will usually have been done during installation.
- Page 31 NOTES. Unvented Hot Water Cylinder...
- Page 32 • The Megaflo product has not been modified or tampered with in any way, other than by a Heatrae Sadia or Baxi Customer Support approved engineer.
- Page 33 Baxi Group Baxi Customer Support approved engineer in accordance with the requirements set out in the maintenance section of the installation instructions. • Access is available, at reasonable times and upon reasonable notice, to the Megaflo product to allow for any inspection repair or replacement.
- Page 34 Should the property be sold, the new owner and any subsequent owners will receive a 30 year warranty from the date the original owner purchased the Megaflo or new home with a Megaflo installed. In non-domestic properties lifetime is a period of 30 years from the date of purchase by the original owner and is transferable to any new owner of the property.
- Page 35 NOTES. Unvented Hot Water Cylinder...
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Page 36: Customer Service
Customer service Telephone: Megaflo 0345 0701058 Hurricane Way E-mail: Norwich commercialservice@ Norfolk baxiheating.co.uk NR6 6EA 7032406_issue_02...
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