Connection Of The Boiler To The Heating System; Use Of Antifreeze Mixture; Protection Against Corrosion - ATTACK SLX20 Instructions For Use Manual

5.4 CONNECTION OF THE BOILER TO THE HEATING SYSTEM

Boiler ATTACK® SLX has to be installed in the system, which meets the requirements of the heat-
ing water quality as follows:
Country
Slovak republic
Austria
Germany
For filling or refilling the water in the system might be used only water which is adapted for val-
ues according to STN 07 7401: 1992. Water has to be clear, colourless, without any suspended
substances, oils and chemical agressive additives and cannot be acidic (pH has to be higher than
7,2). Water hardness cannot exceed 1 mmol/l and concentration of Ca² 0,3 mmol/l.
NOTICE: The warranty of the boiler is not valid in case of infringement of these conditions!

5.4.1 USE OF ANTIFREEZE MIXTURE

It is not recommended to use antifreeze mixture with not suitable quality for the boiler opera-
tion. It is related especially to lowering the heat penetration, big volume expandability, aging,
rubber parts damage. If necessary, use the Alycol Termo (manufacturer Slovnaft Bratislava) anti-
freezing mixture – according to experiences of producer, there is no risk of lowering the safety of
use and noticeable influencing of the boiler work. If this type of protection against freezing is not
achievable in particular conditions, parameters are not fulfiled or there are some boiler failures
caused by use of other antifreezing mixtures, there is no possibility of warranty.

5.4.2 PROTECTION AGAINST CORROSION

Boiler must be connected with device for controlling the tempera-
ture of the boiler reverse. Suitable solution is use of mixing device
ATTACK-OVENTROP (Figure 2), which makes the temperature rise
of the return connection to acceptable level. In this way is boiler
protected against supercooling below 65 °C and creation of the
water steams, acids and tars in the feeding chamber is lowered.
Mixing device ATTACK-OVENTROP allows to set temperature of
return-water in range of ca. 50–70 °C thanks to the thermostatic
head.
Figure 2 Device for protection of the reverse temperature AT-
TACK OVENTROP
NOTICE: If the device against corrosion is not installed in the system or this device does
not work properly, there is a possibility of creation of agressive condensate, which might
lead to the boiler damage. Protection against condensation must be in use during the
boiler operation, otherwise is warranty provided by producer not valid!
Use of the size of ATTACK OVENTROP devices depending on the boiler output:
ATTACK OVENTROP DN25: SLX 20–35 kW
ATTACK OVENTROP DN32: SLX 40–55 kW
14
Number of standards
STN 07 7401:1991
ONORM H5195-1
VDI 2035
Country
Switzerland
Italy
Number of standards
SWKI 97-1
D.P.R. no. 412