elco Combi 24 User Manual

20
Installation
Water and hydraulic system
Heating water quality
Fill the installation with drinking
water.
In most cases, a central heating
installationcanbelledwithwater
according to the nationally valid
regulations, whereby a treatment of the
water is not necessary.
To avoid problems, the quality of
thellingwatermustconformtothe
requirements in Table 1.
Ifthellingwatershouldnotconform
to these requirements, then it is
recommended to treat the water
correspondingly (see VDI2035).
Warranty claims become invalid if the
systemhasnotbeenushedduring
installation,orifthellingwater
quality does not conform to the ELCO
requirements (see Table 1).
If anything should not be clear, or
in case of deviations, always take
upcontactwithELCOrst.The
warranties lapse, if any changes are
made without an advance agreement/
release by ELCO.
Installation:
- The use of groundwater,
demineralized water and distilled
water, is not permitted (an
explanation of these terms can be
found on the next page).
- If the drinking water quality lies
within the limits of the values in
Table 1, then one can proceed with
the installation of the system and
theushingoftheequipment.
- Residues of corrosion products
(magnetite), assembly materials,
cutting oil and other undesirable
products, must be removed during
theushingoperation.
- Another possibility for removing
dirtistheuseofalter.Thelter
type must conform to the system-
specicrequirementsandthe
type of contamination. ELCO
recommendstheuseofalter.In
such a case, one should make sure
to take the entire piping system into
consideration.
- The central heating installation must
be de-aerated properly, before it is
taken into operation. Please review
the Chapter “Commissioning” in this
regard.
- If a regular topping up of water is
required (> 5% per year), then there
is a problem with the system that
mustberemediatedbyacertied
technician. Regular topping up
with fresh water and oxygen adds
lime to the system, which leads to
deposits.
- If an anti-frost agent or other
additives are used, then it must be
regularlycheckedthatthelling
water quality conforms to the
manufacturer requirements.
- Inhibitors may only be used after
consultation with ELCO.
- The use of such agents must be
protocolled.
Floor heating
Whenaoorheatingsystemis
connected that uses plastic pipes, it
must be ensured that it conforms to the
standard DIN 4726-4729. If the system
doesnotfullthestandard,thena
system separation must be foreseen.
If the regulations with regard to
plastic piping are not observed, then
warranty claims become null and
void (see the warranty conditions).
Parameters Value
Water type Drinking water
Softened water
pH 6.0-8.5
Conductivity (at 20°C in µS/cm) Max. 2500
Iron (ppm) Max. 0.2
Hardness (°dH / °fH)
Installation volume/performance
<20 l/kW
1-12 °dH / 1-21.5 °fH
Installation volume/performance
>=20 l/kW
1-7 °dH / 1-12.5 °fH
Oxygen Oxygendi󰀨usionisnotpermittedduringoperations.
Max. 5% of the system volumes may be topped up annually.
Corrosion inhibitors See the Chapter "System water additives (inhibitors)"
pH raising or lowering agents See the Chapter "System water additives"
Anti-frost additives See the Chapter "System water additives"
Other chemical additives See the Chapter "System water additives"
Solid substances Not permitted
Residues in the heating water, which are not a component of
the drinking water are
not permitted
Table 1

elco Combi 24 Specifications

General

Brand	elco
Model	Combi 24
Category	Boiler
Language	English