ACV smart line E Series Manual

Also see for Smart Line SLE 130: Product guide Installation, operating and servicing instructions Installation, operating and maintenance instructions

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ACV smart line E Series Manual Manual pdf 13 page image

T E C H N I C A L A N D I N S T A L L A T I O N118. DISCHARGE PIPEThe discharge pipe (D2) from the tundish should terminate in a safe place where there is norisk to persons in the vicinity of the discharge, be of metal and:a. be at least one size larger than the nominal outlet size of the safety device unless itstotal equivalent hydraulic resistance exceeds that of a straight pipe 9m long i.e.discharge pipes between 9 and 18m equivalent resistance length should be at leasttwo sizes larger than the nominal outlet size of the safety device, between 18 and 27mat least 3 sizes larger, and so on. Bends must be taken into account in calculating theflow of resistance. Refer to Diagram 1, Table 1 and the worked example overleaf.b. have a vertical section of pipe at least 300mm long, below the tundish before anyelbows or bends in the pipework.c. be installed with a continuous fall.d. have discharges visible at both the tundish and the final point of discharge but wherethis is not possible or is practically difficult there should be clear visibility at one orother of these locations. Examples of acceptable discharge arrangements are:i. ideally below a fixed grating and above the water seal in a trapped gully.ii. downward discharges at low level; i.e. up to 100mm above external surfacessuch as car parks, hard standings, grassed areas etc. are acceptable providingthat where children may play or otherwise come into contact with discharges awire cage or similar guard is positioned to prevent contact, whilst maintainingvisibility.iii. discharges at high level; e.g. into a metal hopper and metal down pipe with theend of the discharge pipe clearly visible (tundish visible or not) or onto a roofcapable of withstanding high temperature discharges of water and 3m awayfrom plastic guttering system that would collect such discharges (tundishvisible).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 anyinstallation discharging can be traced reasonably easily. The single commondischarge pipe should be at least one pipe size larger than the largestindividual discharge pipe (D2) to be connected. If un-vented hot water storagesystems are installed where discharges from safety devices may not beapparent i.e. in dwellings occupied by blind, infirm or disabled people,consideration should be given to the installation of an electronically operateddevice 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.

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