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Andris Lux Eco - UK Manual

  • Text
  • Valve
  • Appliance
  • Discharge
  • Heater
  • Electrical
  • Tundish
  • Fitted
  • Thermal
  • Circulation
  • Heating
  • Andris
  • Manual

of withstanding high

of withstanding high temperature discharges of water 3 m from any plastic guttering systems that would collect such a discharge (tundish visible). iv) 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 large than the largest individual discharge pipe to be connected. If unvented hot water storage systems are installed where discharges from safety devices may not be apparent i.e. in dwellings occupied by the blind, infirm or disabled people, consideration should be given to the installation of an electronically operated device to warn when discharge takes place. Note: The discharge will consist of scalding water and steam. Asphalt, roofing felt and non-metallic rainwater goods may be damaged by such discharges. Table 2 Sizing of copper discharge pipe “D2” for common temperature valve outlets. Valve outlet size Minimum size of discharge pipe D1* Minimum size of discharge pipe D2* from tundish G 1/2 15 mm 22 mm 28 mm 35 mm G 3/4 22 mm 28 mm 35 mm 42 mm G 1 28 mm 35 mm 42 mm 54 mm Maximum resistance allowed, expressed as a length of pipe (i.e. no elbow or bends) Up to 9 m Up to 18 m Up to 27 m Up to 9 m Up to 18 m Up to 27 m Up to 9 m Up to 18 m Up to 27 m Resistance created by each elbow or bend 0.8 m 1.0 m 1.4 m 1.0 m 1.4 m 1.7 m 1.4 m 1.7 m 2.3 m Worked example The example below is for a G 1/2” temperature & pressure relief valve with a discharge pipe (D2) having 4 no. elbows and length of 7 m from the tundish to the point of discharge. From Table 2 Maximum resistance allowed for a straight length of 22 mm copper discharge pipe (D2) from G 1/2” T & P valve is 9 m. Subtract the resistance for 4 no. 22 mm elbows at 0.8 m each = 3.2 m. Therefore the maximum permitted length equates to: 5.8 m. As 5.8 m is less than the actual length of 7 m therefore calculate the next largest size. Maximum resistance allowed for a straight length of 28 mm pipe (D2) from G 1/2” T & P valve equates to: 18 m. Subtract the resistance for 4 no. 28 mm elbow at 1.0 m each = 4 m. Therefore the maximum permitted length equates to: 14 m As the actual length is 7 m, a 28 mm (D2) copper pipe will be satisfactory. 16

d) ELECTRICAL WARNING: The appliance must be earthed The electrical installation must be in line with the current I.E.E. wiring regulations. A mains supply of 240 VAC 3 kW (13 amps) is required (Fig. 5) Heat resisting cable, round 3 core 1.5 mm (to BS 6141 table 8) should be used to connect to the electrical supply through either: - a 13 amp socket to BS 1363; or - a double pole fused isolating switch with a contact separation of 3 mm minimum on each pole. The cable enters the terminal compartment through a tube embedded in the foam insulation, the entrance to this tube is on the rear right hand side at the bottom. Flexible cables are colour coded as follows: Brown.................................................. live Blue............................................... neutral Green and yellow............................. earth THERMAL CUT-OUT THERMOSTAT HEATING ELEMENT LED L N E Fig..5 wiring diagram To enter into the terminal compartment unscrew the 2 screws on the cover. (To access the screws, remove the decorative caps on the front control access panel). e) COMMISSIONING - Check that all the necessary components are supplied and for those not factory fitted, that they are the type recommended by the manufacturer for the particular water heater. - Check that the water heater/components are undamaged. - Check that the discharge pipe is plumbed so that it falls continuously and that no taps, valves or other shut-off devices are installed in the pipe. 17