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INSTALLATION AND SERVICE MANUAL
ST XL Cylinder
Cylinder range storage tanks
Indirect 400ltr 500ltr 800ltr 1000ltr 1250ltr 1450ltr 2000ltr 2500ltr
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Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference.
Andrews. Built to perform.
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Table of Contents
Related Manuals for andrews ST XL Cylinder Series
Summary of Contents for andrews ST XL Cylinder Series
- Page 1 ST XL Cylinder Cylinder range storage tanks Indirect 400ltr 500ltr 800ltr 1000ltr 1250ltr 1450ltr 2000ltr 2500ltr Image Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference. Andrews. Built to perform.
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Page 2: Table Of Contents
Contents Product specification ..................... 3 Introduction ........................ 3 General requirements .................... 3 Checklist ........................4 Storage and handling ....................5 Operational summary..................... 6 Indirect dimensions....................8 Technical data......................9 -10 Element allocation....................11 Wiring schematics....................13 Limitations ........................ -
Page 3: Product Specification
Its performance and insulation levels exceed the latest requirements of Building Regulation Part L and L2. The Andrews 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. -
Page 4: Checklist
Checklist Before commencing installation check that all the components for your Andrews water heater are contained in the package. The following components are supplied as standard: Table 1: Cold water inlet control kit (as below, depending on model) Commercial cylinder... -
Page 5: Storage And Handling
To aid installation, the Andrews water heater is provided with lifting points located at the top of the unit. To access the lifting eyes please remove the top cover. The weights of the units are on page 8 table 4. -
Page 6: Operational Summary
OPERATIONAL SUMMARY (Indirect models in conformance with BS EN 12897:2006) Maximum mains water supply pressure 2.5MPa (25 bar) Operating pressure/PRV (low pressure system) 0.60MPa (6. bar) Operating pressure/PRV (high pressure system) 1.00MPa (10 bar) Expansion vessel pressure (low pressure system) 1.0MPa (10 bar max) Expansion vessel pressure (high pressure system) 1.6MPa (16 bar max) - Page 7 and disposed of at end of life Indirect Model(s) 1000 1250 1450 2000 Storage volume V in litres 400.0 500.0 800.0 1000.0 1250.0 1450.0 2000.0 Standing loss in W 72.0 89.0 114.0 139.0 150.0 174.0 179.0 The water heating energy...
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Page 8: Indirect Dimensions
FIGURE 2: Indirect dimensions OUTLET 2” BSP SENSOR T&P VALVE POCKETS SECONDARY RETURN PRIMARY FLOW INLET PRIMARY RETURN Table 3: Indirect measurements Direct Connection 400l 500l Connection 800l 1000l Connection 1250l 1450l Connection 2000l 2500l 1535 1804 1906 2301 1936 2253 2014 2419 1264 1416 1487 1882... -
Page 9: Technical Data
Technical data Table 5: Standing heat-loss NOMINAL STANDING HEAT LOSS PER DAY CAPACITY PER YEAR (kWh/24h) (LITRES) (kWh/24h) 1.72 2.14 2.74 1000 1000 3.33 1215 1250 3.60 1314 1450 4.17 1522 2000 4.30 1569 4.50 1642 2500 Table 6: Indirect coil kW ratings NOMINAL COIL PRIMARY FLOW RATE l/min... - Page 10 Table 9: Maximum kW ratings for auxillary immersions Maximum kW ratings NOMINAL CAPACITY Upper (LITRES) boss 1000 1250 1450 2000 2500 Table 10: Water delivered to 40°C (Indirect cylinders only) NOMINAL Water delivered to 40°C CAPACITY (litres) (litres) 1000 1250 1206 1450 1399...
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Page 11: Element Allocation
Auxillary Immersion allocation Immersion allocation table Element 94110301 94110302 94110303 94110304 94110305 94110306 94110307 94110308 94110309 Location 1000 ... - Page 12 THERMOSTATIC CONTROLS All immersion heaters are fitted with a thermostat which is fitted in the centre of the heater plate and a cut-out which is fitted to the side of the thermostat. These MUST be wired as per figures 4, 5 & 6, below. Maximum working temperature is 70°C/176°F.
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Page 13: Wiring Schematics
Wiring schematic Single phase wiring schematic Earth Neutral Live Fuse (not supplied) Contactors (not supplied) Live Live marked ‘L’ Earth Earth Neutral terminal marked 'N' Typical head layout for a single phase heater Neutral Cut-Out Temperature 80°C Immersion Heater (Factorey set) Note: Figure 5: single phase wiring The 2 external contactors must be approved... -
Page 14: Limitations
The water supply must be of wholesome water quality (Fluid Category 1 as defined by the Water Supply Regulations 1999). The Andrews Water Heaters - STXL cylinder is to be used for the storage of wholesome water (max. 250mg/l chloride). -
Page 15: Installation & Commissioning
Pressure reducing valve: The pressure reducing valve can be connected anywhere on the cold water mains supply prior to the Andrews water heater. 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 16 Figure 3: Cold water combination valve (for 400 & 500ltr) Locking Screw Adjuster 6 or 10 bar adjustable pressure reducing valve 8 or 13 bar pressure relief valve direction direction Pressure relief discharge Mains water in To cylinder Pressure gauge connections (one each side) 28mm compression connections...
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Page 17: Secondary Circulation
Pressure relief valve This should be installed between the pressure reducing valve and the Andrews water heater. Should a balanced pressure cold water draw off supply be required for the cold water outlets, this should be taken off between the pressure reducing valve and pressure relief valve. - Page 18 Figure 5: Pressure reducing valve (for 800ltr & above) Locking screw Adjuster Pressure reducing cartridge Take note of flow direction Outlet to cylinder Mains in Figure 6: Secondary circulation and de-stratification schematic To hot outlets Check valve (not Supplied) WRAS approved pump (not supplied) Secondary...
- Page 19 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.
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Page 20: Discharge Pipework
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. - Page 21 Notes: Discharge pipe-work D2 can now be a plastic pipe but only pipes that have been tested to a minimum 110°C must be used. Discharge pipe D2 can now be plumbed in the soil stack but only soil stacks that can handle temperatures of 99°C or greater should be used.
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Page 22: Indirect System
Indirect system Boiler Selection The Andrews water heater, 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. - Page 23 Figure 9: 2 port valve in conjunction with a 3 port mid-position valve system (“Y” plan) CYLINDER (DHW) CYLINDER INDIRECT ZONE VALVE THERMAL CONTROLS PROGRAMMER (SUPPLIED) BLUE BROWN GREY ORANGE GREEN/YELLOW DOMESTIC HOT WATER HEATING WIRING 9 10 11 12 13 14 15 16 CENTRE ROOM STAT PUMP...
- Page 24 Auxiliary Immersion heater(s) The Andrews water heater can be fitted with a selection of single phase and three phase auxiliary immersion heaters (see immersion allocation table, page 11 for details). The immersion heaters must be installed in accordance with the...
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Page 25: Commissioning
Slowly, manually open for a few seconds, the temperature and pressure relief valve (T&P valve) situated on the Andrews water heater. Check water discharged runs freely away through the tundish and discharge pipework. Close valve, ensure water flow stops and valve reseats correctly. -
Page 26: Maintenance & Servicing
Switch off the electrical supply to the Auxiliary immersion heater(s) and shut down the boiler on indirect units. Turn off the mains water supply to the Andrews water heater. 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 27 OFF THE WATER SUPPLY. CONTACT A COMPETENT INSTALLER FOR UNVENTED WATER HEATERS TO CHECK THE SYSTEM. DO NOT TAMPER WITH ANY OF THE SAFETY VALVES FITTED TO THE ANDREWS WATER HEATER SYSTEM, IF A FAULT IS SUSPECTED CONTACT A COMPETENT INSTALLER.
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Page 28: Fault Finding
The fault finding chart will enable operational faults to be identified and their possible causes rectified. Any work carried out on the Andrews water heaters and its associated controls MUST be carried out by a competent installer for unvented water heating systems. In case of doubt contact the Andrews Water Heaters service department. -
Page 29: Servicing
Spares Spare parts A full range of spare parts are available for the Andrews Water Heaters STXL cylinder range. Refer to the technical data label on the unit to identify the model installed and ensure the correct part is ordered. - Page 30 Spares KEY DESCRIPTION SPARES NUMBER CUT-OUT THERMOSTAT 95612652 ROD THERMOSTAT 95980025 2 PORT MOTORISED VALVE (DN 32) 7031564 2 PORT MOTORISED VALVE (DN 40) 7031565 PUMP 3 SPEED CIRCULATION UP 20-30N 95607366 PUMP 3 SPEED CIRCULATION UPS 15-50N 130 95607404 28mm PUMP ISOLATING VALVE 95605177 1/2”...
- Page 31 Part Part 95:611:025 95:607:396 10-48 43-47 Part Part 95:607:_ _ _ 95:605:_ _ _ 11-14 Part Part 95:605:_ _ _ 95:605:182 17-22 Part Part 95:605:_ _ _ 95:607:452...
- Page 32 23-25 26-29 Part Part 95:605:_ _ _ 95:605:_ _ _ 30-31 Part Part 7033371 95:612:650 Part Part 95:612:652 95:980:053 35&36 37&38 Part Part 7031564 & 7031565 95:607:_ _ _...
- Page 33 Part Part 95:605:177 95:607:690 Part Part 95:607:438 95:980:009 Part 95:605:110...
- Page 35 Notes:...
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Page 38: Guarantee Terms And Conditions
The Andrews water heater has not been subjected to excessive pressure beyond the guidelines detailed in the installation instructions. The Andrews water heater has not been subjected to frost, nor has it been tampered with or been subject to misuse or neglect. - Page 39 The environment This product is made from many recyclable materials, therefore at the end of its useful life it should be disposed of at a local authority recycling centre in order to realise the full environmental benefits. Insulation is by means of an approved HCFC/CFC free polyurethane foam.
- Page 40 Customer support ICOM Energy Association 8am-5pm, Monday-Friday 0345 070 1055 andrewswaterheaters.co.uk linkedin.com/company/andrews-water-heaters @AndrewsWH 500403 Andrews. Built to perform. a Baxi Heating brand Registered office address: Andrews Water Heaters 3 Innovation House, Oaklands Business Centre, Oaklands Park, Wokingham RG41 2FD 36006162_issue_07...
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