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Installation and Service Manual Upsilon-Series
17
Required components that are not supplied by A.O.Smith:
- The installation pump; - The condensate discharge system.
- The installation water lter; - Air and dirt separator
- Gas lter; - Hot water supply
- Regulation valve;
6.2 Expansionvessel
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 instal-
led expansion vessel is sufcient. 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.
6.3 Waterquality
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 specications mentioned in table 6.3.a:
If the lling water does not meet the required specications, you are advised to treat the
water to such an extent that it does meet the required specications.
Thewarrantybecomesinvalid,iftheinstallationisnotbeingushedand/orthe
quality of the lling water does not meet the specications recommended by
A.O.Smith.AlwayscontactA.O.Smithinadvance,ifthingsarenotclearoryou
wishtodiscussanydeviations.Withoutapproval,thewarrantybecomesinvalid.
Installation:
- The use of groundwater, demi-water and distilled water is prohibited. (on the next
page you will nd an explanation of these denitions)
- If the drinking water quality meets the specications mentioned in table 6.3.a, 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. A.O.Smith 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 struc-
tural problem and an installer has to solve the problem. Adding regularly 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.
- Chemical additions are to be avoided and should only be used after A.O.Smith has
approved their corresponding use.
- Should you wish to achieve the required water quality by using chemical additives, then
this is your own responsibility. The warranty on the product delivered by A.O.Smith
expires, if the water quality does not meet A.O.Smith´s specications or the chemical
additives have not been approved by A.O.Smith.