Atag XL110 - Expansion Vessel; Water Quality

Installation & Servicing instructions ATAG XL
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Required components that are not supplied by ATAG:
- The installation pump; - The condensate discharge system.
- Theinstallationwaterlter; -Airanddirtseparator
- Gaslter;   -Hotwatersupply
- Regulation valve; - Flue system
- Expansion vessel(s);
6.2 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 in-
stalled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 (ATAG cylinder connec-
tion 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.
6.3 Water quality
Fill the installation with drinking water.
Inmostcases,aheatingsystemcanbelledwithwateraccordingtonationalstandards
for water and treatment of this water is not necessary.
InordertoavoidproblemswiththeCH-installations,thequalityofthellingwaterhasto
meetthespecicationsmentionedintable6.3.a:
Ifthellingwaterdoesnotmeettherequiredspecications,youareadvisedtotreatthe
watertosuchanextentthatitdoesmeettherequiredspecications.
The warranty becomes invalid, if the installation is not being ushed and/or the
quality of the lling water does not meet the specications recommended by
ATAG. Always contact ATAG in advance, if things are not clear or you wish to
discuss any deviations. Without approval, the warranty becomes invalid.
Installation:
- The use of groundwater, demi-water and distilled water is prohibited. (on the next
pageyouwillndanexplanationofthesedenitions)
- Ifthedrinkingwaterqualitymeetsthespecicationsmentionedintable1,youcan
startushingtheinstallationbeforeinstallingtheboiler(s).
- Whilstushing,corrosionproducts(magnetite),ttingproducts,cuttingoilandother
undesirable products have to be removed.
- Anotherpossibilityistoremovethepollutionbyinstallingalter.Theltertypehas
totthetypeandgrainsizeofthepollution.ATAGrecommendslterusage.
- In this case, the whole piping system should be taken into consideration.
- The CH-installation has to be properly vented before using the system. For that pur-
pose, we refer to the commissioning chapter.
- If a regular water top up is required (>5% on an annual basis), then there is a structural
problem and an installer has to solve the problem. Regularly adding fresh water to the
system also adds additional calcium and oxygen implying that magnetite and calcium
residues can continue. The result may be blockages and/or leakages.
- The use of anti-freeze and other additives requires periodical quality checks of the
llingwaterinaccordancewiththeperiodlaiddownbytheadditivessupplier.