47
4 220 456 / 02
INITIAl COMMISSIONING
Germany and Austria
Filling and replacement water, heating water
The following applies:
• For Germany VDI 2035
•
For Austria ÖNORM H5195
• In addition, the EN 14868 standard must be applied,
as well as the manufacturer-specifi c specifi cations
Manufacturer-specific specifications
Filling and replacement water
The fi lling and replacement water can be both fully dem-
ineralised and also merely softened.
Heating water
• In the case of
full demineralisation of the fi lling and
replacement water
, the electrical conductivity of the
heating water must not exceed the value of 100 μS/cm.
• In the case of
softening the fi lling and replacement
water
, the following conditions must be complied with:
The quality of the heating water must be checked and
documented periodically. Required monitoring interval:
- With installed heat output > 100 kW to 1000 kW:
once a year
- With installed heat output > 1000 kW:
twice a year
The following standard values for the heating water
must be measured and adhered to:
- Electrical conductivity of the heating water for opera-
tion with water containing salts:
> 100 μS/cm to ≤ 1500 μS/cm
- pH value of the heating water for systems without
aluminium alloy as water-side material 8.2 to 10.0
(measurement 10 weeks after commissioning at the
earliest)
• The sum of the chloride, nitrate and sulphate contents
in the heating water must not exceed 50 mg/l in total.
Additional notices
•
Hoval boilers and calorifi ers are suitable for heating
systems without signifi cant oxygen intake. (System
type I according to EN 14868).
• The following systems must be equipped with separate
circuits:
-
Systems with continual oxygen intake (e.g. underfl oor
heating without diff usion-proof plastic piping)
- Systems with intermittent oxygen intake (e.g. requir-
ing frequent topping-up)
• If only the boiler is replaced in an existing plant, it is not
recommended for the entire heating system to be re-
fi lled, provided that the heating water already contained
in the system complies with the relevant directives or
standards.
•
Before fi lling new systems and, where necessary, exist-
ing heating systems containing heating water that does
not comply with the directives or standards, the heating
system must be professionally cleaned and fl ushed.
The boiler must not be fi lled until the heating system
has been fl ushed.
Frost protection agent
See separate engineering sheet “Use of frost protection
agent”.
5.3
Water quality in heating systems
Summary of Contents for 51-UltraGas 2 1000
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