6 months ago

NUOS Plus - User Manual

  • Text
  • Appliance
  • Heater
  • Heating
  • Installation
  • Operating
  • Discharge
  • Maintenance
  • Electrical
  • Technical
  • Regulations
  • Nuos
  • Manual

Heat pump water heater -

Heat pump water heater - TECHNICAL INFORMATION FOR INSTALLERS 3.59 Where a single common discharge pipeserves more than one system, it should beat least one pipe size larger than the largest individual discharge pipe (D2) to be connected. 3.60 The discharge pipe should not be connected to a soil discharge stack unless it can be demonstrated that the soil discharge stack is capable of safely withstanding temperatures of the water discharged, in which case, it should: a. contain a mechanical seal, not incorporating a water trap, which allows water into the branch pipe without allowing foul air from the drain to be ventilated through the tundish; b. be a separate branch pipe with no sanitary appliances connected to it; c. if plastic pipes are used as branch pipes carrying discharge from a safety device, they should be either polybutalene (PB) or crosslinked polyethylene (PE-X) complying with national standards such as Class S of BS7291-2:2006 or Class S of BS 7291-3:2006 respectively; andd. be continuously marked with a warning thatno sanitary appliances should be connected to the pipe. Notes: 1. Plastic pipes should be joined and assembled with fittings appropriate to the circumstancesin which they are used as set out inBS EN ISO 1043-1:2002 Plastics. Symbols and abbreviated terms. Basic polymers and their special characteristics. 2. Where pipes cannot be connected to the stack it may be possible to route a dedicated pipe alongside or in close proximity to the discharge stack Termination of discharge pipe 3.61 The discharge pipe (D2) from the tundish should terminate in a safe place where there is no risk to persons in the vicinity of the discharge. 3.62 Examples of acceptable discharge arrangements are:a. to a trapped gully with the end of the pipe below a fixed grating and above the water seal;b. downward discharges at low level; i.e. up to100mm above external surfaces such as carparks, hard standings, grassed areas etc. are acceptable providing that a wire cage or similar guard is positioned to prevent contact,whilst maintaining visibility; and, c. discharges at high level: e.g. into a metal hopper and metal downpipe with the end of the discharge pipe clearly visible or onto a roof capable of withstanding high temperature discharges of water and 3 m from any plastic guttering system that would collect such discharges. 3.63 The discharge would consist of hightemperature water and steam. Asphalt, roofingfelt and non-metallic rainwater goods may bedamaged by such discharges.In some buildings, e.g. care homes, in-lineblending valves would need to meet theadditional performance standards set outin NHS Estates Model specification D 08 17

Heat pump water heater - TECHNICAL INFORMATION FOR INSTALLERS 4.5 Electrical connections Cable Max current Permanent power supply (cable supplied with the appliance) 3G 1.5mm 2 16A EDF signal (cable not supplied with the appliance) H05V2V2-F 2G min. 0.75mm 2 2A PV/SG signal (cable not supplied with the appliance) H05V2V2-F 2G min. 0.75mm 2 2A AUX signal (cable not supplied with the appliance) H05V2V2-F 2G min. 0.75mm 2 2A IMPORTANT Where an appliance is installed in a room containing a bath or shower, the appliance and any electrical switch or any appliance control, utilitising mains electricity should be situated specifically in accordance with current IEE wiring regulations, Health & Safety document no. 635 (Electricity at Work Regulations). For unusual locations special procedures may be necessary. BS 6798 gives detailed guidance on this aspect. WARNING: Before you get access to terminals, all supply circuits must be disconnected WARNING: Is forbidden remove covers and do maintenance and / or electrical connections by unqualified personnel The appliance is supplied with a power supply cable (should the latter need to be replaced, use only original spare parts supplied by the manufacturer). It is advisable to carry out a check on the electrical system to verify conformity to the regulations in force. Verify that the electrical system can suitably withstand the water heater’s maximum power consumption values (refer to the data plate), in terms of the size of the cables and their conformity to the regulations in force. It is forbidden to use multiple outlet sockets, extension cables or adaptors. It is forbidden to use piping from the water, heating and gas systems for earthing the appliance. Prior to operating the machine, make sure that the electricity mains voltage conforms to the value indicated on the appliance’s data plate. The manufacturer of the appliance shall not be held liable for any damage caused by failure to earth the system or due to anomalies in the electric power supply. To disconnect the appliance from the mains, use a bipolar switch complying with all applicable CEI-EN regulations in force (minimum distance between contacts 3 mm, switch preferably equipped with fuses). The appliance must comply with the European and national standards, and must be protected by a 30mA RCD. The main circuit board on the appliance is fitted with an earth contact for operating purposes only, not for safety purposes. 18


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