Rointe Kyros, Руководство по установке

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4.10. Discharge arrangement.
The tundish must be installed in a position so that it is clearly visible by the user. In addition, the
discharge pipe from the tundish should terminate in a safe place where there is no risk to persons
in the vicinity of the discharge, be of metal, and:
(a) Be at least one pipe size larger than the normal outlet size of the safety device unless its total
equipment hydraulic resistance exceeds that of a straight pipe 9 m long, i.e. discharge pipes
between 9 m and 18 m equivalent resistance length should be at least two sizes larger then the
normal outlet size of the safety device, between 18 m and 27 m at least three sizes larger and so on.
Bends must be taken into account in calculating the flow resistance. Refer to the diagram, tables
and worked example detailed below.
(b) Have a vertical section of pipe at least 300 mm long below the tundish before any elbows or
bends in the pipework.
(c) Be installed with a continuous fall
(d) Have discharges visible at both tundish and the final point of discharge, but where this is not
possible or practically difficult, examples of acceptable discharge arrangements are:
• Ideally below a fixed grating and above the water seal in a trapped gully.
• Downward discharge at low level, (i.e. up to 100 mm above external surfaces such as car
parks, hard standings, grassed areas, etc.) are acceptable providing that where children play or
otherwise come into contact with discharges, a wire cage or similar guard is positioned to prevent
contact whilst maintaining visibility.
• Discharge at high level, e.g. into a metal hopper and metal down pipe with the end of the
discharge pipe clearly visible (tundish visible or not) 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 (tundish visible).
• 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 six systems so that any
installation discharging can be traced
reasonably easily. The single common
discharge pipe should be at least one
pipe size larger 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 blind, or disabled people), consideration
should be given to the installation of an
electrically operated device to warn when
discharge takes place.
Warning Notice – The discharge will
consist of scalding water and steam.
Asphalt, roofing felt and non-metallic
rainwater goods may be damaged by such
discharges.
Figure 3 - Typical discharge pipe arrangement.
TUNDISH
SAFETY
DEVICE
500mm MIN
300mm MIN
Metal discharge pipe from
temperature relief valve to tundish
Safety device (Eg: Temp relief valve)
Discharge below fixed grating
Fixed Grating
Trapped Gullley
Metal discharge pipe from Tundish
with continuous fall.