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Installation and Maintenance Instructions
IMPORTANT NOTE TO THE INSTALLER
Read these installation and maintenance instructions before commencing. Unvented cylinders are a controlled service as
defined in the latest edition of the building regulations and should only be fitted by a competent person.
The relevant regulations are: England and Wales – Building Regulation G3; Scotland – Technical Standard P3; North Ireland – Building Regulation P5.
After installation the installer must left the instructions manual with the householder.
Unvented Hot Water Cylinders
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Summary of Contents for Biasi Unvented Hot Water Cylinders
- Page 1 Unvented Hot Water Cylinders Installation and Maintenance Instructions IMPORTANT NOTE TO THE INSTALLER Read these installation and maintenance instructions before commencing. Unvented cylinders are a controlled service as defined in the latest edition of the building regulations and should only be fitted by a competent person. The relevant regulations are: England and Wales – Building Regulation G3; Scotland – Technical Standard P3; North Ireland – Building Regulation P5. After installation the installer must left the instructions manual with the householder. ...
- Page 2 unvented hot water cylinders installation and maintenance instructions Page 2 / 20 PRE‐INSTALLATION STORAGE Store the unit standing upright in its original packaging in an area free from excessive damp. FEATURES OF THE UNVENTED CYLINDER: ‐ Made from Duplex Stainless Steel for excellent corrosion resistance ‐ Strong rust‐proofed steel case ‐ Highly insulated with environmentally friendly foam ‐ Available in range of sizes to suit ‐ 125L, 150L, 170L, 200L, 250L and 300 litres ‐ All models including Solar models are available in Direct or Indirect versions ‐ Supplied complete with all the necessary safety and control devices needed to connect cold water mains ‐ All safety and control devices are pre‐adjusted ‐ High quality controls selected that combine high flow rate performance with minimum pressure drop which gives fantastic performance in all areas, with great improvements in areas with poor water pressure ‐ KIWA approved for compliance with the Water Supply (Water Fittings) Regulations 1999 and Building Regulations G3 & L. COMES COMPLETE WITH ALL THE FITTINGS YOU NEED TO COMPLETE THE INSTALLATION: ACCESSORIES DIRECT INDIRECT SOLAR DIRECT SOLAR INDIRECT Expansion Vessel Wall mounting kit for expansion vessel Expansion vessel hose Tundish 10 way electrical box High flow rate inlet control set ...
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Page 3: Siting The Unit
unvented hot water cylinders installation and maintenance instructions Page 3 / 20 SITING THE UNIT This unit can supply outlets above it or at some distance from it but any outlets above the unit will reduce the available outlet pressure by 0.1 bar for every 1m of height difference. The maximum length of the “dead leg” should be as stated in the Water Supply (Water Fittings) Regulations 1999 G18.7, in particular to the area of most frequent use. Particular attention is needed if sitting in a garage or outbuilding as the unit should be protected from frost. All exposed pipework must be insulated. The unit must be installed UPRIGHT on a flat base capable of supporting its weight when full (please see the technical specification section for weights). The minimum recommended cupboard size is 650mm square. ... -
Page 4: General Installation
Only immersion heaters with a thermal cutout may be used. To help ensure this, the immersion heaters have a special 1¾” thread. They are rated at 3 kW at 240 V and are of a low noise Incoloy construction. They have both a thermostat and a high limit cutout. Please order the correct replacement from BIASI; fitting non‐approved immersions may affect your guarantee. When fitting, ensure the ‘O’ ring is positioned correctly on the head of the immersion heater and lubricate before fitting. Fit it by hand until almost home then tighten gently as the ‘O’ rings will seal easily. The electrical supply to each immersion heater ... -
Page 5: Discharge Arrangement
unvented hot water cylinders installation and maintenance instructions Page 5 / 20 DISCHARGE ARRANGEMENT Note: It is not acceptable to discharge straight into a soil pipe Note: The discharge will consist of scalding water and steam. Asphalt, roofing felt and non‐metallic rainwater goods may be damaged by such discharges. The inlet control group should be positioned so that the discharge from both safety valves can be combined via a 15mm end feed Tee, as in the diagram above. Connect the tundish and route the discharge pipe which must be routed in accordance with Building regulation ‐ Part G3 of schedule 1. When operating normally water will not be discharged. Water discharge from the two safety valves will only occur under fault conditions. The tundish should be vertical, located in the same space as the unvented hot water storage system and be fitted as close as possible, within 500mm of the safety device e.g. the temperature relief valve. The position of the tundish must be that when installed it is visible to the occupants of the premises. When ... - Page 6 unvented hot water cylinders installation and maintenance instructions Page 6 / 20 not) or onto a roof capable of withstanding high temperature discharges of water and 3m from any plastic guttering systems that would collect such discharges (tundish available). 4. Where a single pipe serves a number of discharges, such as in blocks of flats, the number served should be limited to not more than 6 systems so that any installation can be traced reasonably easily. The single common discharge pipe should be at least one pipe size larger than ...
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Page 7: Typical Wiring Diagrams
FP75 or CP15 Programmer Basic Boiler Pump COMMISSIONING FILLING First you must ensure that the pressure in the expansion vessel is the same as the setting of the pressure reducing valve i.e. 3 bar (45PSI). The valve is of the Schrader car tyre type. Check all the connections for water tightness including any factory made connections such as the immersion heater and the temperature and pressure relief valve. Prior to filling, open the hot tap furthest away from the BIASI SILVER to expel air. Open the cold main isolation valve and allow the unit to fill. Once the cylinder as been fully commissioned should be heated to its normal operating temperature. Draw off secondary hot water to each outlet and allow hot water to flow from each outlet for at least 30 seconds to remove any flux residue from the pipe work within the secondary hot water system. Then fully drain the cylinder and re‐filled to ensure that all flux residues is removed from the system. DIRECT UNITS After both filling with water and purging of sterilisation liquid, switch on the power to the immersion heaters and allow the unit to start to heat. The immersion heater is supplied preset at 55°C. Turning fully to + sets to approx 65°C. ... - Page 8 Page 8 / 20 SAFETY VALVE CHECKS Any sign of water coming from either the expansion relief valve or the temperature/pressure relief valve during heat‐up indicates a problem. Next hold both of these safety valves fully open, allowing as much water as possible to flow through the tundish. Check that your discharge pipework is free from debris and is carrying the water away to waste efficiently. Release the valves and check that they reseat properly. SERVICING GENERAL Servicing should only be carried out by competent installers and any spare parts used must be purchased from BIASI Cylinders. NEVER bypass any safety devices or operate the unit without them being fully operational. DRAINING Switch the electrical power off (important to avoid damage to element). Isolate boiler from the unit. Turn off the cold water supply valve. Open hot water tap. Open the drain valve. The unit will drain. WARNING: WATER DRAINED OFF MAY BE VERY HOT! ANNUAL MAINTENANCE The water heaters require annual servicing in order to ensure safe working and optimum performance. It is essential that the following checks are performed by a competent installer on an annual basis. This is commonly done at the same time as the ...
- Page 9 If tap runs cold after a minute or so the pipe is picking Hot or warm water from cold tap Insulate / re‐route up heat from heating pipework GUARANTEE The stainless steel vessel carries a fully EXCLUSIONS – THE GUARANTEE DOES NOT COVER: transferable 25‐year guarantee against faulty materials or manufacture provided that: ‐ It has been correctly installed as per the Installation. Instructions and all the relevant standards, regulations and codes of practice in force at the time. ‐ It has not been modified in any way, other than by BIASI. ‐ It has not been misused, tampered with or subjected to neglect. ‐ The system is fed from the public mains water supply. ‐ It has only been used for the storage of potable water. ‐ It has not been subjected to frost damage. ‐ The unit has been serviced annually. ‐...
- Page 10 GUIDANCE IN THE EVENT OF A PROBLEM If you have a problem in the first year, contact the plumber who fitted the unit. Thereafter contact the plumber who carries out the annual servicing for you. If your BIASI Silver develops a leak we will supply you with a new one. We ask for a nominal upfront payment to prevent fraud. We will require the original unit to be returned to us for inspection along with a copy of your Benchmark Log Book. If it is confirmed that it has failed within the terms of the guarantee your upfront payment will be ...
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Page 11: Technical Specifications
unvented hot water cylinders installation and maintenance instructions Page 11 / 20 TECHNICAL SPECIFICATIONS DIRECT Ø540 Top view CAPACITY A B C D E F WEIGHT WEIGHT [L] [mm] [mm] [mm] [mm] [mm] [mm] Empty [kg] Full [kg] 125 1045 812 647 287 272 ‐ 30 155 150 1205 972 757 ... - Page 12 unvented hot water cylinders installation and maintenance instructions Page 12 / 20 SOLAR UNVENTED DIRECT SINGLE COIL CYLINDER Detail for the installation of a Solar Unvented Direct cylinder in an electric home. GENERAL When installing this product it is essential the overall installation meets all current legislation including, in particular, the high limit isolation requirements of Building Regulation G3. This document is designed to assist in achieving that aim. WATER The potable water connection and tundish discharge connection are to be connected in exactly the manner described in Pages 3 to 7 of this manual. IMMERSION HEATERS The standard issue immersion heaters are designed for domestic usage where the lower heater is connected to a low rate off‐ peak tariff and the upper heater used for occasional top‐up purposes. Heaters of this nature are not designed to be permanently live. For usage outside of domestic parameters Titanium immersion elements are recommended. SOLAR CONNECTIONS The flow and return from the solar heat source are to be connected to the indirect coil. Either primary coil connection (A) may be utilised as the flow or return. The solar sensor, supplied as part of the solar controls, inserts into Pocket B and is held in‐situ with the black sensor pocket retaining bung provided. It is necessary to mount the solar pump in the return pipework with the ...
- Page 13 unvented hot water cylinders installation and maintenance instructions Page 13 / 20 TYPICAL SCHEMATIC WIRING DIAGRAM: SOLAR HIGH LIMIT CONTROL These schematic wiring diagrams depict an IMIT high limit control stat and the connections are numbered accordingly. Where an alternative is supplied connect as per manufacturers’ instructions. ...
- Page 14 unvented hot water cylinders installation and maintenance instructions Page 14 / 20 TECHNICAL SPECIFICATIONS SOLAR DIRECT Ø 540 Top view CAPACITY A B C D E F G H I J WEIGHT WEIGHT [L] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] Empty [kg] Full [kg] 200 1505 1272 957 ...
- Page 15 unvented hot water cylinders installation and maintenance instructions Page 15 / 20 SOLAR UNVENTED CYLINDERS Solar cylinders have been designed specifically with Solar applications in mind. Featuring a purpose designed solar coil, which allows maximum heat transfer of solar energy into the stored water, the cylinders are suitable for use with a wide range of solar systems now available in the UK and Ireland and are an efficient and environmentally friendly way of providing Domestic Hot Water. Solar cylinders also offer the benefit of mains pressure hot water – powerful showers and fast filling baths. Solar cylinders are available in a range of sizes from 200L, 250L and 300 litres and in Direct or Indirect versions. Solar cylinders are manufactured from high grade Duplex stainless steel. Solar cylinders are designed to accept heat input from a renewable/sustainable (i.e. Solar) heat source. Where this input does not fully meet the desired temperature a guaranteed quantity of water can be heated to an acceptable temperature by the householders traditional heat source of gas, oil or electricity. The Domestic Heating Compliance Guide document L1A and L1B provides excellent advice in sizing both cylinder designated solar areas and heat exchangers to the surface area of the solar collectors. Using this guide are able to offer sizing advice for ...
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Page 16: Specification Summary
unvented hot water cylinders installation and maintenance instructions Page 16 / 20 SPECIFICATION SUMMARY MATERIALS ‐ Inner shell ‐ Duplex Stainless Steel ‐ Coil ‐ Stainless Steel AISI 316L ‐ Bosses ‐ Stainless Steel ‐ Every cylinder is water tested to a pressure of 10bar. INSULATION ‐ Fire retardant polyurethane foam, nominal thickness 45‐50mm. ‐ The foam is CFC‐Free and HCFC‐Free. ‐ The foam has an Ozone Depletion Potential of Zero and a Global Warming CASEWORK ‐ Electrostatically painted steel ANODE ‐ None fitted/none required EXPANSION VESSEL ‐ CONTROL SETTINGS ‐ Pressure Reducing Valve ‐ 3 Bar ‐ Expansion Relief Valve ‐ 6 Bar ‐ Pressure and Temperature Relief Valve ‐ 7 Bar/90°C ‐ High Limit Thermostat in Dual Thermostat ‐ High Limit Thermostat in Immersion Heater IMMERSION HEATER ‐ 1¾” BSP Parallel Threaded Head ‐ Long Life Incoloy Sheathed Low Noise Element 16” ‐ Long Long Life Incoloy Sheathed Thermostat Pocket ‐ Brazed Construction ‐ Combined Thermostat and Safety Cutout ‐ Element Rating 3kW at 240V A/C ... - Page 17 unven nted hot wa ater cylinders s instal lation and m maintenance e instructions Page 1 1 7 / 20 ANUFACTURE ED by ww.videira.pt ...
- Page 18 unven nted hot wa ater cylinders s instal lation and m maintenance e instructions Page 1 1 8 / 20 ...
- Page 19 unvented hot water cylinders installation and maintenance instructions Page 19 / 20 NOTES ...
- Page 20 Biasi UK Ltd Commercial Road Leamore Enterprise Park Walsall WS2 7NQ Telephone number: 01922 714600 Fax number: 01922 714626 Company website: www.biasi.co.uk ...
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