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MEGAFLO Eco Plus Solar Instruction Manual

Unvented hot water cylinders 800l -1000l
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MEGAFLO Eco Plus Solar
Unvented Hot Water Cylinders
800L -1000L
Important
Please read & understand all these instructions before commencing installation.
Please leave this manual with the customer for future reference
MEGAFLO Eco Plus Solar Product Guide

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Summary of Contents for MEGAFLO Eco Plus Solar

  • Page 1 MEGAFLO Eco Plus Solar Unvented Hot Water Cylinders 800L -1000L Important Please read & understand all these instructions before commencing installation. Please leave this manual with the customer for future reference MEGAFLO Eco Plus Solar Product Guide...

  • Page 2: Table Of Contents

    Contents 1. Introduction....................3 1.1 General ....................3 1.2 Symbols used .................... 3 1.3 Abbreviations ................... 3 1.4 Liabilities ....................3 2. Safety ......................4 2.1 General safety warnings ................4 2.2 Recommendations ..................4 2.3 Specific safety instructions ................ 4 3.

  • Page 3: Introduction

    In the interest of UK customers, we are continuously 1. Introduction endeavouring to make improvements in product quality. All the specifications stated in this document are therefore 1.1 General subject to change without notice. The following instructions are offered as a guide to the Our liability as the manufacturer may not be invoked in user and installer.

  • Page 4: Safety

    2.3 Specific safety instructions 2. Safety WARNING 2.1 General safety warnings water discharges from DANGER temperature/pressure relief valve on the cylinder shut down the boiler. Do not This cylinder is unvented and as such becomes turn off any water supply. Contact a pressurised when in operation.

  • Page 5: Technical Specifications

    3. Technical specifications 3.1 Technical data Solar: Max direct kW rating Aux Coil surface area m² Solar Coil surface area m² 15l/min 25.1 26.6 Aux Coil rating (kW) 30l/min 37.2 38.3 60l/min 47.5 45.8 15l/min 64.2 74.5 Aux coil heat up time 30l/min 44.6 54.1...
  • Page 6 OUTLET 2”BSP FEMALE 35° REF 30°REF 45°REF 40°REF Figure 1: General dimensions - Solar 800l - 1000l Item Connection 800l 1000l 1914 2327 T&P/ 1/2" BSP 1503 1863 1/2" & 1" BSP 1218 1538 1 3/4" BSP 1138 1338 1/2" BSP 1049 1249 1 1/4"...

  • Page 7: Electrical Diagram(S)

    Schematic Wiring Diagram - Basic 2 x 2 Port Valve System Cylinder terminal block 1 2 3 Zone valve (DHW) Zone valve (HTG) Room stat (supplied) Br Bl 1 3 2 Br Bl (Supply) 3 4 5 6 7 8 9 10 Junction box 1 2 3 4 5 6 7 8 9 10 Programmer...

  • Page 8: Dimensions And Connections

    6kW immersion Step 1: - remove 4 retaining screws and lift lid o immersion heater Step 2: - remove 2 screws holding thermostatic controls and slide out thermostat from stat pocket. Step 3: - Wire up immersion as per gures 6, page 11. If three phase wiring chosen remove “Live”...
  • Page 9 Single phase wiring schematic Earth Neutral Live Fuse (not supplied) Contactors (not supplied) Live Earth = Max temp = Approx 65° = Min temp Neutral Rotate spindle clockwise to increase Immersion Heater temperature and counter clockwise to decrease the temperature Note: The 2 external contactors must be approved Figure 5: Single phase wiring schematic...
  • Page 10 Control High limit thermostat thermostat Load (Demand Contact) Satis ed Common (S/L) Temperature Adjustment Thermal cut-out °C reset under screw head Figure 7: Indirect wiring schematic Unvented Hot Water Cylinder...

  • Page 11: Description Of The Product

    4. Description of the product 4.1 General description This product is a purpose designed unvented water heater. The unit has a stainless steel inner vessel, which ensures an excellent standard of corrosion resistance. The outer casing is a combination of resilient thermoplastic mouldings and soft jacket.
  • Page 12 Hot outlet Sensor pocket T&P connection Secondary return Immersion heater Auxillary thermostat Auxillary ow Auxillary return Solar thermal cut-out Primary ow Primary return Cold inlet Figure 8: Main Connections Unvented Hot Water Cylinder...

  • Page 13: Before Installation

    energy input is not under effective thermostatic 5. Before installation control, unless additional and appropriate safety measures are installed. 5.1 Installation regulations Ascending spray type bidets or any other class 1 back syphonage risk requiring that a type A air gap be employed.

  • Page 14: Transport

    Figure 10: Lifting the unit Unvented Hot Water Cylinder...

  • Page 15: Installation

    6.2 Water connections 6. Installation 6.1 General WARNING After reading the previous sections in this booklet and Under no circumstances should the choosing a good location for the unit please install, factory fitted temperature/pressure paying attention to the following hydraulic, electrical and commissioning sections.
  • Page 16 (not supplied). the installation as long as the valve is installed with The expansion vessel must be connected between the direction of flow arrows pointing in the correct the cold water combination valve and the cylinder. direction. The location of the expansion vessel should allow The expansion relief valve should be installed with access to recharge the pressure as and when the discharge pipework in either the horizontal...
  • Page 17 Secondary circulation  If secondary circulation is required it is recommended In direct electric installations where a secondary that it be connected to the cylinder as shown (see fig. circulation is required particular attention should be 13, below). paid by the installer to maintain the returning water temperature (guidelines state that a minimum of 55°C The secondary return pipe should be in 28mm pipe return temperature is advisable).
  • Page 18 Discharge Note: To comply with the Water Supply (Water Fittings) It is a requirement of Building Regulation G3 that any Regulations, the tundish should incorporate a suitable discharge from an unvented system is conveyed to where air gap. it is visible, but will not cause danger to persons in or about the building.
  • Page 19 appliances connected to it; Worked example of discharge pipe sizing (c) if plastic pipes are used as branch pipes carrying discharge from a safety device they should be either Fig. 13: shows a G1/2 temperature relief valve with a polybutylene (PB) to Class S of BS 7291-2:2006 or discharge pipe (D2) having 4 No.
  • Page 20 Maximum Resistance Minimum Size Of Resistance Valve Minimum Size Of Allowed, Expressed As A Discharge Pipe D2 Created By Each Outlet Size Discharge Pipe D1 Length Of Straight Pipe From Tundish Elbow Or Bend (I.E. No Elbows Or Bends) 22mm up to 9m 0.8m G1/2...

  • Page 21: Electrical Connections

    6.3 Electrical connections 6.4 Filling the installation Check expansion vessel pre-charge pressure. The In case of difficulty contact service support; contact expansion vessel pressure must be set in accordance details are available on page 32 of this booklet. with the inlet pressure set on the pressure reducing valve.

  • Page 22: Solar Primary Installation

    6.5 SOLAR PRIMARY The solar controller and solar primary circulation pump must be wired via the over-temperature cut-out mounted in the lower solar controls housing (see figure 15, below). CONNECTION TO THE SOLAR PRIMARY CIRCUIT This will ensure that the heat input to the solar coil is The lower (Solar) coil of the cylinder must be connected to interrupted in the event of the cylinder over-heating.

  • Page 23: Commissioning

    The solar controller should be programmed to give a maximum storage temperature in the Megaflo eco Solar of 70 C although 65 C is recommended 7.2 Checklist before commissioning...

  • Page 24: Operation

    Temperature controls – direct units immersion 8. Operation heater Immersion heaters are fitted with a dual thermostat 8.1 General and cut out, figure 6, page 9 Access to the thermostat can be made by opening the immersion heater cover - DISCONNECT THE WARNING ELECTRICAL SUPPLY...

  • Page 25: Maintenance

    9. Maintenance Descaling immersion heater(s) 9.1 General Turn off the mains water supply, isolate the electrical Maintenance requirements supply and turn off boiler Unvented hot water systems have a continuing Attach a hosepipe to the drain cock having sufficient maintenance requirement in order to ensure safe length to take water to a suitable discharge point working and optimum performance.
  • Page 26 Re-commissioning Check all electrical and plumbing connections are secure. Close the drain cock. With a hot tap open, turn on the cold water supply and allow unit to refill. DO NOT switch on the immersion heater(s) or boiler until the unit is full. When water flows from the hot tap allow to flow for a short while to purge air and flush through any disturbed particles.

  • Page 27: Troubleshooting

    10. Troubleshooting Water contained in the cylinder may be very hot, especially following a thermal control failure. Caution must be taken when drawing water from the unit. WARNING The fault finding chart (table 7, below) will enable Do not tamper with any of the safety valves operational faults to be identified and their possible or controls supplied with the cylinder as this causes rectified.

  • Page 28: Decommissioning

    11. Decommissioning 11.1 Decommissioning procedure Isolate electrical supplies and make safe Isolate the water supply Drain the cylinder Drain the primary circuit (indirect only) Remove cylinder Cap pipework Environmental information Products are manufactured from many recyclable materials. At the end of their useful life they should be disposed of at a Local Authority Recycling Centre in order to realise the full environmental benefits.
  • Page 29 Figure 18: Spares schematics Unvented Hot Water Cylinder...

  • Page 30: Benchmark Checklist

    Commissioning & service records Unvented Hot Water Cylinder...
  • Page 31 Unvented Hot Water Cylinder...
  • Page 32 See section 3 to 9 heater is assembled, installed or maintained and disposed of at end of life Indirect Model(s) 1000 Energy efficiency class Storage volume V in litres 800.0 1000.0 Standing loss in W 114.0 139.0 Table: Technical parameters in accordance with European Commission regulations 814/2013 and 812/2013 Unvented Hot Water Cylinder...

  • Page 33: Guarantee

    • 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.

  • Page 36: Customer Service

    Customer service Telephone: Megaflo 0344 8711535 Hurricane Way Norwich Facsimile: Norfolk 0344 8711528 NR6 6EA E-mail: megafloservice@heateam.co.uk 36006204_issue_02...

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