Heatrae Sadia Electromax Installation Guide - Advanced Water

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5.0 Installation - Plumbing Diagram 10 Cold Water Combination Valve Pipe connections to the Electromax must be Solder connections directly to the unit must not be made as the heat may damage the insulation materials used. Damage caused proximity to the unit will not be covered by the warranty. Solder connections may be used elsewhere in the system away from the residue is removed following installation. 5.2 Cold Water Combination Valve EXPANSION VALVE COLD MAINS CONNECTION (22mm) PRESSURE REDUCING VALVE HOUSING EXPANSION VALVE OUTLET (15mm) OUTLET CONNECTION (22mm) The Cold Water Combination Valve can be connected anywhere on the cold water mains supply prior to the Electromax unit, however it must be possible to connect the secondary system Expansion Vessel between this valve and the cold inlet connection of the unit. Whilst it is often more convenient to do so, there is no requirement to site the valve close to the unit, it can be located at a point remote from the unit if this is more convenient. However, ensure the discharge from the Expansion Valve (see Diagram 10) can be correctly installed. The Expansion Valve connection must not be used for any other purpose. The Cold Water Combination Valve is installed as a complete one-piece unit. The valve incorporates an Isolating Valve, a Pressure Reducer, a Strainer, an Expansion Valve and a single Check Valve. The valve can be however, ensure the valve is installed with side of the brass body) pointing towards the Electromax unit. PRESSURE REDUCING VALVE CARTRIDGE (3.5 bar) 5.3 Secondary Expansion Vessel The Secondary (DHW) Expansion Vessel is to the cold water supply to the Electromax to accommodate any water expansion that results from heating the water inside the between the Cold Water Combination Valve and the cold inlet of the Electromax cylinder (see Diagram 5, page 10). The Expansion Vessel must be adequately supported, a wall mounting bracket is supplied for this purpose. The location of the Expansion Vessel should allow access for maintenance. This will entail access to the air valve on top of the unit to check and, if necessary, re-charge the vessel pre-charge pressure. The vessel pre-charge pressure is 3.5 bar. 14 Installation & Servicing Instructions
5.4 Balanced Cold Water Supplies It is advantageous in many mixer showers or taps to have balanced pressure hot and cold water supplies, in these instances the balanced cold water supply should be teed off the supply to the Electromax immediately after the Cold Water Combination Valve (see diagram 5, page 10). Branches to cold outlets where drinking water may be drawn should be taken directly from the main supply before the Cold Water Combination Valve to avoid the possibility of warm expanded water being drawn from cold taps. 5.5 Outlet Pipework The pipework from the Electromax to the with short runs of 15mm pipe to showers and basins. Small bore pipe can be used to suit some taps, but runs should be kept as short as possible. Pipe sizes may vary due to system design. 5.6 Secondary Circulation Secondary circulation is not recommended for the Electromax as it is intended for Off-Peak electrical operation. During other periods the electricity supply is interrupted to the immersion heaters so no reheating will take place. Circulating the stored water would gradually cool it to an unacceptable temperature. It is a requirement of Building Regulations that any discharge from an unvented system should be visible and safely conveyed away from the system without danger to persons in or about the building where it is installed. The with the requirements and guidance notes of Building Regulations. Building Regulation G3 Requirements and Guidance section 3.9 are reproduced in the following sections. Information Sheet No.33 available from the British Board of Agrement gives further advice on discharge pipe installation. For discharge pipe arrangements not covered by G3 Guidance or BBA Info sheet No. 33 advice should be sought from either your local Building Control Officer or Heatrae to the Electromax will convey any discharge from the unvented cylinder Temperature and Pressure Relief Valve and the sealed system Pressure Relief Valve. A discharge pipe will also be required from the Expansion Valve. Where practical this can be teed into the discharge pipe from the Electromax. It is recommended that an additional tundish early indication of operation of the Expansion Valve. In some instances it may be possible to discharge into an internal waste system and soil stack. To do this a self sealing waste after the tundish to prevent foul odours or back-pressurisation from the waste system entering the building via the tundish. In these systems it is essential that the tundish is of discharge will not be visible. Consult the manufacturer’s recommendations with waste and soil stack materials selection. It will also be necessary to get dispensation discharge in this manner. Discharges from an unvented system can be up to 95 o C for several minutes, ensure any waste or soil pipe connected to the discharge can safely accept these conditions. G3 REQUIREMENT “…there shall be precautions…to ensure that the hot water discharged from safety devices is safely conveyed to where it is visible but will not cause danger to persons in or about the building.” Installation & Servicing Instructions 15
Page 1 and 2: ELECTROMAX Combined Electric Flow B
Page 3 and 4: 1.0 Introduction 1.1 Important Note
Page 5 and 6: 2.0 Technical Data Specification /f
Page 7 and 8: Diagram 2 Key Components Primary Sy
Page 9 and 10: 3.0 General Requirements 3.1 Locati
Page 11 and 12: For optimum performance after insta
Page 13: 4.3 Cable Entry Positions The elect
Page 17 and 18: Worked example of discharge pipe si
Page 19 and 20: 6.0 Installation - Electrical 6.1 I
Page 21 and 22: 6.3 Boiler Connection (45 Amp) The
Page 23 and 24: Circuit in accordance with BS 759
Page 25 and 26: Hot Water “BOOST” On Indictator
Page 27 and 28: 8.0 Maintenance 8.1 Maintenance req
Page 29 and 30: Top Panel Primary Expansion Vessel
Page 31 and 32: Diagram 25 Electric Boiler Fault Fi
Page 33 and 34: Diagram 32 Water Heater Fault Findi
Page 35 and 36: A range of replacement parts is ava
Page 37 and 38: WARNING: DISCONNECT FROM ALL ELECTR
Page 39 and 40: Valve (see Diagram 42) a. Drain pri
Page 41 and 42: Control PCB a. Remove cover from ov
Page 43 and 44: 10.0 Guarantee This product is guar

Heatrae Sadia Electromax Installation Guide - Advanced Water

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