elco TRIGON L PLUS - DHW Quality; Expansion Vessel

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Denition of water types
Drinking water
- Tap water, in conformity with the
European Drinking Water Directive:
98/83/EC,dated3November1998.
Softened water
- Water, from which calcium and
magnesiumionshavebeenpartially
removed.
Demineralized water
- Water, from which almost all salts
havebeenremoved(verylow
conductivity).
Distilled water
- Water, in which no more salts are
present.
Installation
Water and hydraulic system
DHW quality
Expansion vessel
TheCH-installationhastobettedwith
an expansion vessel. The expansion
vessel used has to comply with the
water contents of the installation.
It is not necessary to install an
expansionvesseltoeachboiler.One
single, central installed expansion
vesselissu󰀩cient.Whenusinga
single expansion vessel the handles of
thevalvesontheowandreturnpipes
belowtheboilerhavetoberemoved
whilst open.
Aboilerexpansionvesselcanbe
connected on the cross union inside
thereturnpipetoeachboiler,if
required.Theconnectionisttedwith
a3/4"outerthreadblankingcap.
Expansion DHW cylinder circuit
When applying a DHW cylinder
connecteddirectlytotheboiler
(ELCO cylinder connection with use
of3-wayvalve)thecircuitbetween
the three-way valve and the separation
oftheDHWcylindershouldbe
provided of an expansion tank. See
also page 34.
For installation in UK, please refer to
UK standards.
Expansion vessel