Related Manuals for MEGAFLO 400L
Summary of Contents for MEGAFLO 400L
- Page 1 MEGAFLO Eco Plus Unvented 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 28 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, for indirect units, 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 immediately after the Cold Water Combination 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 SECONDARY RETURN THERMOSTATIC CONTROL (BOILER) 3kW IMMERSION PRIMARY FLOW PRIMARY RETURN COLD INLET Table 2: Cylinder sizes TYPE DIMENSIONS (mm) SIZE DIRECT INDIRECT 1502 1116 400L 400L 1502 1116 1132 1416 500L 1802 1416 1802 500L 1132 1327 1611 570L...
- Page 9 HEAT-UP (LITRES) TIME (mins) 104.9 131.0 149.5 Times based on nominal volume Times based on a 45°C temperature rise Table 6: Cylinder weights TYPE WEIGHTS SIZE DIRECT INDIRECT EMPTY FULL 400L 400L 500L 500L 570L 570L Unvented Hot Water Cylinder...
- Page 10 Indirect Cylinder • General Installation • Indirect Model • Direct Model • 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.
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Page 16: Indirect Model
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. -
Page 17: High Limit Thermostat
The MEGAFLO Eco Plus is compatible with most heating controls, examples of electrical circuits are given in Figures 10 and 11, page 18. However, other systems may be suitable, refer to the controls manufacturers’... - 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...
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Page 19: Direct Model
Direct Model Immersion Heater(s) The MEGAFLO Eco Plus is supplied with four factory fitted immersion heaters. Each immersion heater is rated 3kW at 240V. To remove the immersion heater: Disconnect the immersion from the mains electrical circuit and make sure the cylinder is completely drained down. Remove the immersion cover and disconnect the wiring from the thermostat. - Page 20 When the primary circuit is full return the lever to the 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
Switch off the electrical supply to the immersion heater(s) and shut down the boiler on indirect units. Turn off the mains water supply to the MEGAFLO Eco Plus unit. 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. - 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 Unvented Hot Water Cylinder...
- Page 25 Fault finding 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 32.
- 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 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 The declared load profile The water heating energy efficiency class of the model The water heating energy efficiency in % 38.7...
- Page 31 NOTES. Unvented Hot Water Cylinder...
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Page 32: User Instructions
If in any doubt consult a competent electrician. 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 33 • 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 34 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 35 Please contact Baxi Customer Support on 0844 871 1535 for details. *In domestic† properties, lifetime is the period during which the first owner of the MEGAFLO or new build home continues to own the property. 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.
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Page 36: Customer Service
Customer service Telephone: Megaflo 0344 8711535 Hurricane Way Facsimile: Norwich 0344 8711528 Norfolk NR6 6EA E-mail: megafloservice@heateam.co.uk 36006165_issue _08...
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