Evoqua WALLACE & TIERNAN S10k, Instruction Manual

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WT.025.200.000.DE.IM 0517
Installation
S10k
4.
4.5 Relief line
• Do not terminate the safety vent line in areas frequented by
personnel - external work areas, footpaths etc., or adjacent to
windows or ventilation system intakes.
• The line must run on a continuous down gradient, without low
traps, to a point outside the building. Where traps are unavoi-
dable or a down gradient is not possible, provision for conden-
sate removal (i.e. drip leg) must be installed at all low points.
• The safety vent line is an essential feature of any gas control
system. The vent line should be supported over its entire
length. We recommend to install an activated carbon filter at
the end of the chlorine vent line. Otherwise the free end of the
vent line must be turned down to prevent the ingress of mois-
ture. Mount the screen W3T159424 to the end to prevent the
entry of insects and possible blockage of the line.
• It is recommended that a suitable warning notice be affixed
adjacent to the vent outlet, eg. ‘WARNING - CHLORINE
FUMES’.
• Safety vent lines from components handling the same gas
may be commoned up to a single point but provision must be
made for plugging off any one line when the associated flow-
meter is shut down for maintenance purposes.
• When a relief valve is installed in the vacuum line, close the
vent outlet of the vacuum demand valve.
4.6 Activated carbon filter
Absorbs small amounts of chlorine gas.
As soon as the activated carbon is saturated, chlorine gas is dis-
charged from the underside of the filter housing. Chlorine gas
odour is then detectable and the gas detector (option) installed in
the room is triggered.
In this case, and regularly once a year, replace the activated car-
bon filter (refer to the instructions on the plate on the filter housing,
the servicing instructions and spare parts).