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Megaflo Compact SystemReady
Please read & understand all these instructions before commencing installation.
Please leave this manual with the customer for future reference
Unvented Indirect
Hot Water Cylinders
Important
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Table of Contents
Related Manuals for MEGAFLO 2sf
Summary of Contents for MEGAFLO 2sf
- Page 1 Megaflo Compact SystemReady Unvented Indirect Hot Water Cylinders Important Please read & understand all these instructions before commencing installation. Please leave this manual with the customer for future reference ...
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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 3. Technical specifications ................5 3.1 Technical data ................... 5 3.2 Dimensions ....................6 3.3 Electrical diagram(s) .................. -
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
CAUTION - Water may drip from the discharge pipe of Do not operate immersion heaters until the the pressure-relief device and this pipe must appliance has been filled with water. be left open to the atmosphere; (see page 17 for more details) -The pressure-relief device is to be operated regularly to remove lime deposits and to verify... -
Page 5: Technical Specifications
3. Technical specifications 3.1 Technical data: Max direct kW rating Immersion heat up times (Btm immersion, 3kW) Coil surface area (m²) 0.51 15l/min 33.1 40.1 43.0 45.1 Coil heat up times 30l/min 26.9 30.2 34.8 37.7 45/min 25.0 28.8 32.3 34.2 15l/min 13.1... -
Page 6: Dimensions
3.2 Dimensions and connections Size DIMENSIONS (mm) 1130 1256 1008 1413 1084 1515 Table 3: General dimensions table - SystemReady Figure 1: General dimensions - SystemReady... -
Page 7: Electrical Diagram(S)
3.3 Electrical diagram PROGRAMMER - HEATING ZONE PROGRAMMABLE INDIRECT (DHW) & DOMESTIC HOT WATER ROOM THERMOSTAT THERMAL CONTROLS ZONE VALVE (SUPPLIED) FOR ZONE 2 (SUPPLIED FITTED) (SUPPLIED FITTED) Br Bl ROOM SENSOR (SUPPLIED) N.B. A DOUBLE POLE ISOLATING SWITCH MUST BE INSTALLED IN THE MAINS SUPPLY 1 2 3 14 15 16... -
Page 8: Description Of The Product
4. Description of the product 5. Before installation 4.1 General description 5.1 Installation regulations This appliance is a purpose designed unvented water heater. The unit has a stainless steel inner vessel, which WARNING ensures an excellent standard of corrosion resistance. The outer casing is a combination of resilient thermoplastic Installation of the appliance must be carried mouldings and pre-coated steel. -
Page 9: Choice Of Location
Limitations The appliance should not be used in association with any of the following: WALL Solid fuel boilers or any other boiler in which the energy input is not under effective thermostatic control, unless additional and appropriate safety Min 250mm Min 250mm measures are installed. -
Page 10: Installation
The boiler should have a control thermostat and non 6. Installation self-resetting thermal cut-out and be compatible with unvented storage water heaters. 6.1 General Should be a sealed system - maximum primary pressure 3 bar. After reading the previous sections in this booklet and The primary flow from the boiler must be pumped. -
Page 11: Water Connections
6.2 Water connections Cold water control pack CAUTION WARNING Flush supply pipe work before Under no circumstances should the connection to remove all flux and debris factory fitted Temperature/Pressure/ prior to fitting the inlet controls. Failure Expansion Relief Valve be removed other to do this may result in irreparable than by a competent person. - Page 12 System boiler complete SystemReady Unit Filling loop assembly Lockshield balancing valve DHW Motorised valve Drain off cock CH motorised valve Tapping for Zone 2 CH motorised valve CH circuit Figure 6: Primary circuit schematic To Hot Outlets Secondary circulation If secondary circulation is required it is recommended that it be connected to the appliance as shown (see fig The secondary return pipe should be in 15mm pipe and incorporate a check valve to prevent backflow.
- Page 13 Pressure reducing valve cartridge (3 bar) Take note of ow direction Mains in Outlet to Mega o 22mm compression connections Figure 8: 3 bar Pressure Reducing Valve 3 bar Pressure Reducing Valve Isolation valve to be paired with Reducing valve Isolation valve Figure 9: Isolation and 3 bar pressure reducing valve Mains water...
- Page 14 Figure 11: Schematic installation diagram.
- Page 15 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 air discharge from an unvented system is conveyed to where gap. it is visible, but will not cause danger to persons in or about the building.
- Page 16 Worked example of discharge pipe sizing if plastic pipes are used as branch pipes carrying discharge from a safety device they should be either polybutylene (PB) to Class S of BS 7291-2:2006 or cross Fig. 12: shows a G1/2 temperature relief valve with a linked polyethylene (PE-X) to Class S of BS 7291-3:2006;...
- Page 17 Maximum Resistance Minimum Size Of Resistance Created Valve Outlet Minimum Size Of Allowed, Expressed As A Discharge Pipe D2 From By Each Elbow Or Size Discharge Pipe D1 Length Of Straight Pipe (I.E. Tundish Bend No Elbows Or Bends) 22mm up to 9m 0.8m G1/2...
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Page 18: Electrical Connections
6.3 Electrical connections Access to Control Unit: Disconnect from mains supply before removing any In case of difficulty contact service support; contact covers. details are available on page 36 of this booklet. Removing the Control Cover. WARNING Unscrew the large screw using a flat ended screw driver. -
Page 19: Filling The Installation
Open successive hot taps to purge the system of air. Immersion connections WARNING Indirect control wiring Should the Megaflo be used in conjunction with a boiler or external controls that 1.5mm² 3 Core HO5 VV-F control the water temperature via a sensor... -
Page 20: Commissioning
Direct Heating 7. Commissioning Switch on electrical supply to the immersion heater and allow the appliance to heat up to normal working 7.1 General temperature, factory set to 57°C but for maximum water availability reset to 70°C (see Fig 16 page 19). After filling the installation with water in the previous The adjustment represents a temperature range of section please follow the following steps to complete the... -
Page 21: Operation
Maximum working temperature is 70°C. installer or the Megaflo service department. The boiler thermostat and thermal cut-out must be wired in series with the 2 port motorised zone valve supplied to interrupt the flow of primary water around the heat exchanger coil when the control temperature has been reached. -
Page 22: Maintenance
9. Maintenance Close hot tap, turn on isolating valve or main stop cock to the system. Check for leaks. 9.1 General Descaling immersion heater - Draining appliance Maintenance requirements Turn off the mains water supply, isolate the electrical 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... -
Page 23: Troubleshooting
Disconnect the electrical supply before removing any 10. Troubleshooting electrical equipment covers. NEVER bypass any thermal controls or operate system without the necessary safety valves. WARNING The fault finding chart (table 5, 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 appliance as causes rectified. -
Page 24: 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 realize the full environmental benefits. -
Page 25: Spare Parts List
12. Spare parts 12.1 Spare parts list A full range of spare parts are available for the appliance. Refer to the Technical Data label on the unit to identify the model installed and ensure the correct part is ordered. ITEM DESCRIPTION SPARES NUMBER Cold water inlet control kit - Complete (NOT SHOWN) - Page 26 Pressure Reducing Valve Cartridge (3 Bar) Strainer Mesh 3 Bar Pressure Reducing Valve - Complete Figure 17: Exploded view of 3bar pressure reducing valve Mixed water Cold water from Mixer Valve Mains Hot water from cylinder Figure 18: Mixing valve...
- Page 27 Figure 19: SystemReady exploded view...
- Page 28 Figure 20: Indirect exploded view...
- Page 29 NOTES.
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Page 30: Benchmark Checklist
Benchmark checklist... -
Page 31: Commissioning & Service Records
Commissioning & service records... -
Page 32: Warranty
• Failure to comply with installation instructions (whether • The Megaflo Compact product and any part or parts of oral or in writing), the Megaflo product (whether factory fitted or otherwise) have not been repaired or replaced other than by a Baxi Customer Support approved engineer and any replacement •... - Page 33 Megaflo Compact 25 year warranty is the period during which the first owner of the Megaflo Compact or a new build home continues to own the property. Should the property be sold, the new owner and any subsequent...
- Page 34 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 UB4 0TY Tel: 020 8606 3567 Parts Center Tel: 0344 292 7057 www.partscenter.co.uk Newey &...
- Page 35 NOTES.
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Page 36: Customer Service
Customer service Telephone: 0344 8711535 Megaflo Hurricane Way Facsimile: 0344 8711528 Norwich E-mail: megafloservice@baxi.co.uk Norfolk NR6 6EA Important notice to installations outside of the UK. References to legislation, legal requirements, regulations, building regulations benchmark, spares stockists, guarantees and warranty are ONLY APPLICABLE WITHIN THE UK.
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