This manual must be kept with the appliance Part No.
© Copyright Andrews Water Heaters 2009 Reproduction of any information in this publication by any method is not permitted unless prior written approval has been obtained from Andrews Water Heaters. Andrews Storage Water Heaters have been designed and manufactured to comply with current International standards of safety. In the interests of the health and safety of personnel and the continued safe, reliable operation of the equipment, safe working practices must be employed at all times. The attention of U.
GENERAL INFORMATION SECTION 1 SECTION 2 SECTION 3 SECTION 4 SECTION 5 PAGE GENERAL DESCRIPTION AND INTRODUCTION General Information Equipment Description System Schematics Basic Operation 2 3 4 5 TECHNICAL SPECIFICATION Overall General Specification 7 INSTALLATION Pipework Solar Collectors Solar Station Wiring & Panel Domestic Hot Water Top Up & Primary 9 11 15 17 21 23 TECHNICAL INFORMATION Technical Information Solar Collectors Solar Water Cylinders Solar Station 25 26 28 29 CHECK LIST Chec
SECTION 1 GENERAL DESCRIPTION AND INTRODUCTION GENERAL The SOLARflo systems have been designed and selected to offer a complete solar package INFORMATION to provide Domestic Hot Water (DHW) with maximised contribution from solar irradiation for commercial systems. The systems offer solutions for a variety of applications, to deal with the larger applications associated with commercial systems as well as dealing with higher storage temperatures and legionella.
EQUIPMENT DESCRIPTION SECTION 1 REF CIRCUIT EQUIPMENT 1 SOLAR Solar collectors GLAZED FLAT PLATE Collects both direct and diffuse solar radiation and transfers it to the water medium. GLAZED FLAT PLATE: Insulated frame with copper pipe-work welded to an absorbtion plate. This is covered with special glass (with low thermal expansion co-efficient) to allow maximum radiation to pass through but to limit heat loss. 2 SOLAR A controller to control the solar gain and intergrate the 'top up' heating.
SECTION 1 GENERAL DESCRIPTION AND INTRODUCTION COLLECTOR SENSOR SYSTEM SOLAR COLLECTOR PANELS SCHEMATICS FIG 1 SOLAR CONTROL PANEL SECONDARY RETURN PUMP SOLAR PUMP STATION NON-RETURN VALVE TEMPERATURE / PRESSURE RELIEF VALVE 7 BAR / 95ºC FLOW COMMISSION & FILLING VALVE HI-LIMIT STAT SOLAR EXPANSION VESSEL PRE-HEAT SOLAR VESSEL MAXXFLO WATER HEATER ANTI-LEGIONELLA CIRCUIT & PUMP (TIMED) NON-RETURN VALVE FLOW HOT WATER OUTLETS EXPANSION VESSEL DRAIN COCK NON-RETURN VALVE EXPANSION RELIEF VAL
GENERAL DESCRIPTION AND INTRODUCTION SECTION 1 BASIC OPERATION: (SEE FIG 1) Solar irradiation energy incident on the the solar collectors is transfered (in the form of heat energy) to the solar circuit fluid. The circuit fluid is pumped around the system, transferring this heat energy to the storage cylinder, indirectly via a coil. In Glazed Flat Plate Collectors heat is transferred to copper pipes carrying the heat transfer fluid with the assistance of an absorber plate.
SECTION 1 GENERAL DESCRIPTION AND INTRODUCTION PRE-HEAT In a pre-heat system the water in the cylinder is heated only by the solar. This is discharged SYSTEM to a secondary device e.g storage calorifier/direct-fired water heater. These can be supplied as part of the SOLARflo system. If the secondary device requires primary hot water a primary system can be included. The standard systems supplied with SOLARflo use direct gas fired water heaters.
TECHNICAL SPECIFICATION SECTION 2 OVERALL GENERAL SPECIFICATION OF THE SOLARflo SYSTEM. DESCRIPTION: SOLARflo MANUFACTURER: Andrews Water Heaters FEATURES TECHNICAL DETAIL: Vessel Sizes: 450, 550, 700, 900 (Litres) Max Flow Rate: (solar circuit) 30 l/min Max Pressure Drop:(solar circuit) See curve in pump station instructions Pressure: (solar circuit) Temperature: (solar system) Max 6bar(g) 120°C. Higher Temperatures will occur* Pressure: (dhw system) Temperature: (dhw system) Standard 3.
SECTION 3 INSTALLATION PRIMARY Please refer to the Technical Specification Appendix for details of the individual equipment. SYSTEMS The overall specification sheet will indicate specific supply of the system supplied. GENERAL WARNINGS: The solar system should never be left with water in and not fully commissioned. If commissioning can not take place, the unit should be left with no water content or the collectors covered. Both circuits contain unvented systems.
INSTALLATION SECTION 3 PIPEWORK The equipment supplied by Andrews Water Heaters is designed to be easy to install due to its module supply. The interconnecting pipe-work is schematically shown in Fig 2. Fig.
SECTION 3 INSTALLATION CONNECTIONS: D,E Fig. 2 shows the required connections for standard supply (solid lines). The individual connection points can be seen in the installation instructions for the particular item of equipment. This will also show how to connect multiple collectors together. Connection D: This is the pipe-work in the vacinity of the solar station. The distance of this pipe-work is usually small and is therefore economical to use copper.
INSTALLATION SECTION 3 SOLAR COLLECTORS PLEASE REFER TO FULL INSTALLATION INSTRUCTIONS APPROPRIATE COLLECTORS AND MOUNTING EQUIPMENT. REGARDING The collectors should be only fitted by suitably trained/qualified installers. Collectors are usually located at height and therefore must be installed by competent persons. Collectors will be fitted on a variety of roof types.
SECTION 3 INSTALLATION PERFORMANCE and LOCATION. The collectors could be split into fields (see basic operation) due to performance, site location or both. If separate fields are required these can be arranged into either series or parallel confirmations. COLLECTOR LAYOUTS Fig.3 If collectors are installed in parallel either in the same field, or due to location separate fields, the flow balancing should be addressed.
INSTALLATION A PT1000 temperature sensor is used to determine whether there is enough solar energy from the collectors. This sensor measures the temperature of the collector absorber or, in the case of evacuated tube collectors, the water leaving the collector array, to check there is sufficient heat gain. SECTION 3 SENSORS IN PANELS The two different collectors (glazed flat plate or evacuated tubes) require different sensor type and location. See Fig 3 for collector layout.
SECTION 3 INSTALLATION MULTIPLE FIELDS If the individual solar fields are exposed to different levels of solar irradiation due to roof angle, orientation, location or shading, seperate sensors should be used for each field. The fields should then be treated separately and wired back in to the controller. The sensor should be placed on the return leg from each field, and one sensor per field. SCHEMATICS OF COLLECTOR sensor location in multiple fields (fig 4). Fig.
INSTALLATION SECTION 3 SOLAR STATION Comprising: Pumping Station, Expansion Kit, Pipe-Work Ancillaries. The three main items are generally factory fitted by Andrews Water Heaters onto a frame to form the èSolar Stationê. If the equipment is supplied loose please efer r to the installation instructions for the individual components. This èSolar Stationê will equire r floor mounting and must not be wall hung.
SECTION 3 INSTALLATION ANCILLARY Fill Flush Drain Valve: EQUIPMENT A fill, flush and drain valve is fitted. The valve is used to initially fill the system by Andrews Water Heaters. As this valve is to be used for draining as well as for filling it is recommended that this is installed in the lowest part of the solar circuit. Flexible connections are recommended to attach to drain. This will allow easy connection and reconnection of the drain after filling.
INSTALLATION SECTION 3 WIRING AND PANEL GENERAL: All solar system control is managed by the main ‘Solar Station’. This includes all power wiring. The main controller and any ancillary electrical items will be located on the èSolar Stationê. There are many variations of systems for control e.g. multiple collector and cylinder sensors and pumps including variation of systems for primary heating control.
SECTION 3 INSTALLATION Solar Station electrical layout for Standard Installations: Fig.6 *primary temperature sensor will generally only be used in combined (twin-coil) cylinders. In a pre-heat system with the MAXXflo or other direct-fired water heater. The temperature control is carried out within the heater and therefore primary heater control is not required. It is recommended that the power to the controller is easily isolated locally either by plug switch or switch local to the ‘Solar Station’.
INSTALLATION SECTION 3 Wiring is straight forward as operation of the SOLARflo system is setup within the controller. All the individual equipment needs wiring back into the controller. If there are multiple solar fields, and/or multiple cylinders, extra sensors will need to be wired back to the controller (see Fig 7). MULTI SYSTEMS If any outputs require volt free contacts or high loads please refer to the simple connections above. A ‘Solar Station’ can have more than one contactor/relay.
SECTION 3 INSTALLATION Please refer to the specification sheet for connections supplied for your specific controller and wiring diagrams. All connections should be made using appropriately sized wire. (15M = 0.50mm 2, >15M = 0.75mm2) The temperature sensors used for this controller are PT1000 Please note for standard systems seperate wiring diagrams are not supplied. Termination cable at sensors, pumps and other devices.
INSTALLATION SECTION 3 DHW SIDE DHW Vessel, expansion and cold feed kit. The individual instructions should be read through thoroughly before installing. If there is any doubt, please ask Andrews Water Heaters. Installation should only be carried out by competent persons. Standard system supplied are unvented, therefore the system should only be installed and commissioned by qualified persons as per Building Regualtions.
SECTION 3 INSTALLATION DE-STRATIFICATION: COMBINED VESSELS The Destratification pump is supplied fully fitted, only wiring is required PRE HEAT VESSELS. The Destratification pump is supplied fitted SENSORS PRE-HEAT VESSELS: The solar sensor (T2) can be located at higher level when a preheat is used. The Primary heating sensor is loacted in a second vessel if supplied. If the unit is supplied with the MAXXflo unit there is no requirement for primary heating sensor as control is carried out by the MAXXflo.
INSTALLATION All systems must ensure that the DHW final temperature is achieved. all though many systems are available the installation instructions will only cover the three standard systems. SECTION 3 DHW TOP UP AND PRIMARY TOP UP SYSTEM: 1. COMBINED: This refers to twin-coil and possibly single coil pre-heat cylinders fitted with electric immersion heaters. 2. PRE HEAT with MAXXflo See Fig 8 for connections.
SECTION 3 INSTALLATION PRIMARY The following assumes top-up temperature control is managed out by the solar controller. Control Valve: A control valve (2/3 way) is required to be fitted in the feed line from the primary heating system. This has to be sized for flow and pressure drop. The control from the ‘Solar Station’ can only be used for on/off functions. The voltage must be 230V and the maximum current must not exceed the output from the 'Solar Controller'.
TECHNICAL INFORMATION REF 1 CIRCUIT EQUIPMENT SOLAR The solar collectors SECTION 4 VARIATION AVAILABLE TYPE Glazed Flat Panel Collector QUANTITY SELECTION BASIS Based on required performance of system and suitable location. Based on DHW demands, location and Type of Collector. 2 SOLAR A controller to control the solar gain and integrate the ‘top up’ heating. NONE N/A Only one controller is used throughout the range.
SECTION 4 TECHNICAL INFORMATION INFORMATION Technical data ABOUT THE COLLECTOR Gross Area Net Area Aperture m2 2.55 Weight (dry) kg 48 2 2.21 Contents I 1.5 2 2.29 Max. Pressure bar 10 m m 100 1081 700 1000 TECHNICAL DATA Absorber coating: Light transmission efficiency: Absorption efficiency: Emissions: Stagnation temperature: Max. operating pressure: Design approval No.: Heat transfer medium: 26 2277 2356 121 1102 high sensitive vacuum coating 90.8% ± 2% 95.0 % +/- 2% 5.
TECHNICAL INFORMATION SECTION 4 The collectors of this series are dry sealed without silicine. The solar glass cover is sealed by means of an uncemented rubber frame. The full-face absorber is bedded in an aluminium trough on a layer of rockwool with a thickness of 50mm. A special modular mounting system was developed for the series which makes it possible to realise stand-alone (A-frame mounted) and roof mounted solutions with equal ease. FK 7300 GLAZED 2.
SECTION 4 TECHNICAL INFORMATION SCHEDULE OF SERIES 2000 VERTICAL WATER HEATERS GENERAL ASSEMBLY TABLE OF DIMENSIONS CAPACITY A B C D E F G H J L M N P R S T PARTS LIST WH-610-_ _ _ LITRES 450 1805 1675 685 600 500 210 300 1" 1" 1" 1" 540 150 199 650 264 550 2160 2030 685 600 500 210 300 1" 1" 1" 1" 150 199 650 264 700 2690 2560 685 600 500 210 300 1" 1" 1" 1" 150 199 650 264 900 1702 1572 986 900 500 285 425 300 11/2" 11/2" 11/2" 1" A1= B1= 28 C1= D1= 50
TECHNICAL INFORMAT A ION AT SECTION 4 SOLAR STA TAT TA ATION FRAME STANDARD EQUIPMENT 6 SSEL VE SYSTEM 450 550 700 900 1 COLLECTORS PREHEAT COMBINED PANEL FK700N MO DEL S111 S112 S113 S114 MODEL S115 S116 S117 S118 QT Y 4 (S100) 5 (S100) 6 (S100) 4+3 (S100) 6 DHW-EXP.
SECTION 4 TECHNICAL SPECIFICAT A ION AT SOLAR IRRADIAT A ION AT LO ORIENTA TAT TA ATION AND ROOF ANGLE North Angle of tilt 90° 90° 80° 70° 80° 70° 60° 60° 50° 50° 40° 40° 30° 30° 20° 20° 10° 10° West East S.W. S.E.
TECHNICAL INFORMATION SECTION 4 PUMP CURVE SOLARflo SYSTEM CONFIGURATION MATRIX Water No No of No of Storage Hot Water Solar Collectors Capacity Cylinders Collectors in Series (Litres) SOLARflo 450 SOLARflo 550 SOLARflo 700 SOLARflo 900 450 550 700 900 1 1 1 1 4 5 6 7 4 5 6 4+3 STAINLESS CORRUGATED No of Total Solar Parallel Collector Pipework Circuits Area Diameter (m2) (mm) 1 1 1 2 10.2 12.75 15.3 17.
SECTION 5 CHECK LIST CHECK LIST This check should be carried out after installation, it however is no guarantee that the system is fully installed correctly and should only act as a guide. Mechanical: Solar: The pipe-work is connected correctly for the flow of the system. Check each unit. Lower cylinder coil connection should be connected to the pump side of the pump station at the flow meter. Check expansion vessels are connected and are NOT isolated and relief valve fitted and piped.
Publication Date: MAY 2011 Baxi Commercial Division Wood Lane, Erdington, Birmingham B24 9QP Sales: Technical: 0845 070 1056 0845 070 1057 Email: andrews@baxicommercialdivision.com www.andrewswaterheaters.co.
