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Baxi Solarflo Installation Manual

Solar thermal domestic hot water system
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See also: User Manual
Please read these instructions before installing or commissioning.
The Solarflo - Solar Thermal Domestic Hot Water System should
only be installed by a competent person.
Please leave these instructions with the user for safe keeping.
Installation Guide
Solarflo - Solar Thermal Domestic Hot Water System
© Baxi Heating UK Ltd 2007.

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Summary of Contents for Baxi Solarflo

  • Page 1 Please read these instructions before installing or commissioning. The Solarflo - Solar Thermal Domestic Hot Water System should only be installed by a competent person. Please leave these instructions with the user for safe keeping. Installation Guide Solarflo - Solar Thermal Domestic Hot Water System...
  • Page 2 Control of auxiliary heat input © BAXI Heating UK Ltd 2007. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, or stored in any retrieval system of any nature...

  • Page 3: Introduction To Solar

    Baxi Solarflo package provide a supplementary heat exchanger coil and immersion heater as standard.

  • Page 4: Solar Collector Specifications

    Gross density 50-80kg/m Pressure loss collector for anti-freeze/water mixture (40%/60%) at a thermal conducting temperature of 50°C. Δ Pressure loss curve: p = 0,0002x + 0,00301x Mass flow rate [kg/h] Pressure loss [mbar] 1228 Solarflo - Solar Thermal Domestic Hot Water System...
  • Page 5 45W / 45W Setting 2: 68W / 65W Setting 3: 90W / 85W Maximum Pump Head: 6 metres Maximum Pump Capacity: 4.5 m /h / 3.5 m Flow meter scale: 2 to 15 l/min Solarflo - Solar Thermal Domestic Hot Water System...

  • Page 6: Differential Temperature Controller

    Self explanatory, menu driven operation Adjustable control valves System monitoring Energy yield, (solar gain) measurement Suitable for flat plate and evacuated tube type collectors Reheat thermostat function Can be used in a number of system configurations Solarflo - Solar Thermal Domestic Hot Water System...

  • Page 7: Ancillary Components

    Min flow required for stable control: 5 l/min Cold 60mm For pressure drop diagram and dimensions see Fig. 6.1 & Fig. 6.2 NOTE: For optimum operation the cold connection must be taken from a balanced cold water feed. 22mm Solarflo - Solar Thermal Domestic Hot Water System...

  • Page 8: Cylinder Specifications

    Building Regulation G3. Baxi recommend the use of the Heatrae Sadia Megatech Unvented and Megalife vented cylinders. The use of other cylinders may not satisfy the requirements of Building Regulation G3. Solarflo - Solar Thermal Domestic Hot Water System...
  • Page 9 Detailed installation and commissioning instructions are supplied with the cylinders. Note: The Baxi Solarflo is also compatible with cylinders configured for solar DHW systems. For installation and specification details refer to the manufacturers instructions supplied with the solar cylinder.

  • Page 10: Safety Information

    Solarflo - Solar Thermal Domestic Hot Water System...

  • Page 11: Risk Assessments

    Solarflo - Solar Thermal Domestic Hot Water System...
  • Page 12 (up to 250°C). NOTE: “On-roof” type panel shown.The “In-roof” type panel has connections on the top edge of the collector (see Fig. 2.2) and the sensor pocket is located behind the left hand connection. Solarflo - Solar Thermal Domestic Hot Water System...
  • Page 13 Solar expansion vessel complete with mounting bracket and strap assembly. 9. Expansion vessel connecting hose. 10. Expansion vessel self sealing connection. 11. Thermostatic Blending valve. 12. 2m insulated flexible steel hoses for connection to collectors Solarflo - Solar Thermal Domestic Hot Water System...

  • Page 14: Identification Of Components

    (Fig. 11). The hydraulic station has a solar differential temperature controller (Fig. 11 Item 6) integrated into the front insulation moulding.This is pre-wired to the solar pump. Solarflo - Solar Thermal Domestic Hot Water System...
  • Page 15 Fit earthing clamps to the solar primary flow and return pipes and connect the earth clamps to the earthing system of the property using an earth bonding cable of min. 6mm diameter. Solarflo - Solar Thermal Domestic Hot Water System...
  • Page 16 Mark the outside of any insulation to identify the flow and return pipes. The Baxi Solarflo panels are supplied with 2x2m pre insulated flexible stainless steel tubes. Additional lengths (30m) of stainless steel flexible tubes and high temperature insulation can be supplied.
  • Page 17 5). Drill and plug the mounting positions and screw the mounting brackets into position. Push the rear insulation moulding over the wall brackets and refit the hydraulic assembly (Fig 15. Item 6) to the mounting clips on the wall brackets. Solarflo - Solar Thermal Domestic Hot Water System...

  • Page 18: Connecting Pipework

    9.9.2 Connecting the solar cylinder Flow to cylinder For detailed installation instructions refer to the installation instructions supplied with the solar cylinder. Solarflo - Solar Thermal Domestic Hot Water System...

  • Page 19: Installation Of Solar Controller

    (temperature sensors and flow transmitters).The terminals on the left side of the terminal block are for 230/240 V~ connections. Solarflo - Solar Thermal Domestic Hot Water System...
  • Page 20 All switch outputs (A1, A2 and A3) are 230/240V~ closers. If potential-free contacts are needed, appropriate accessories are required. Solar differential controller Solar coil Double pole over-temp isolating switch cut-out 230V/240V~ Mains supply Solarflo - Solar Thermal Domestic Hot Water System...
  • Page 21 Tth/TDiff1 Tfr TDiff2 2 collector array, 1 storage cylinder (pump-pump) Tcoll1 Tst1 Tcoll2 Tret Tth/TDiff1 Tfr TDiff2 NOTE:The solar gain flowmeter must be connected to sensor terminals marked WMM (see Fig. 21). Solarflo - Solar Thermal Domestic Hot Water System...

  • Page 22: Connection Of Temperature Sensors

    Fig. 24 10.0 Installation of solar controller Block Wiring Schemes Solarflo in conjunction with auxiliary heating by boiler - no reheat control 10.6 Connection of temperature sensors by solar controller. The controller uses precise platinum temperature 3A Fused Supply Boiler Terminal Strip...

  • Page 23: Key To Abbreviations

    Solar O/Temp Cutout Baxi accept no liability for any loss or damage arising from any errors or omissions that may be inadvertently contained within these diagrams. Auxiliary heating by boiler with 3 port mid position valve system - reheat control by solar controller.
  • Page 24 Conditions of Sale which are available on request. B AX I A Trading Division of Baxi Heating UK Ltd, a division of Baxi Group. Brooks House, Coventry Road,Warwick. CV34 4LL After Sales Service and Technical Enquiries 08700 603261 Our contact centre is open Monday to Friday 8am to 6pm, Weekends and Bank Holidays 8.30am to 2pm.

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