Strebel S-CBX 105, Руководство по установке, эксплуатации и техническому обслуживанию

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The pH and water quality of the system should be checked on a yearly basis when antifreeze is used in a system.
Replace the antifreeze every 5 years or sooner based on the instructions from the manufacturer or if the pH is out
of the required range.
A micro bubble air elimination device is required to be installed in all heating systems. An air scoop is not an
acceptable substitute for a micro bubble air elimination device and should not be used in the installation. A few
examples of acceptable devices are
- Spirovent
- Caleffi Discal
If an automatic feed valve is installed in the system, it should not be left open indefinitely. A continuous feed of
fresh water could damage the system. It is recommended that after a short period of time following the installation
of the boiler into a heating system that the automatic feed valve be closed.
If the boiler is used in a system with snow melt where antifreeze percentages are above the suppliers specified
values, it must be isolated from the snow melt with a plate heat exchanger.
7.12 Use of glycol
To mitigate the risk of a defect pump the use of glycol can be considered. All materials, used in the boiler, are
resistant to glycol.
Glycol at itself will acidify because of thermal degradation over time. This acidity will cause serious damage to most
components in the heating system including the boiler. Because of this, specific anti-freeze products are available
in the market for use in heating systems. These consist mainly of glycol, but they have additives added which act
against internal corrosion and/or scale formation. An important part of these additives are so called “balancers”
which are added to the product, to absorb the rise of acidity of the glycol over time because of thermal degradation.
The chemical compatibility of two specific anti-freeze products has been tested by the heat exchanger producer.
These products mainly consist of glycol next to the described additives.
If these products are used according to the instruction, they will not harm the boiler.
These anti freeze products are:
Manufacturer Type Composition
Fernox Alphi 11 consists of 97% Mono Propylene Glycol next to some additives.
Sentinel X500 estimated as being between 90-100% Mono Propylene Glycol.
When using other glycol-based antifreeze products make sure that it is an equivalent product to the two mentioned
above which will behave exactly the same on all materials and equipment in the heating systems.
Maximum glycol concentration is 40%. This protects up to -23 °C.
Because of the higher viscosity of the glycol mixture, increase pump head by 20% at 40% glycol. For use with
glycol, select a pump with glycol seals.
Because of the lower heat capacity of the glycol mixture, power will be reduced by approximately 10% at 40%
glycol. No fan speed or maximum temperature reduction will be necessary.
It is advised to check the frost protection and acidity of the mixture in the heating system every year.
7.13 Chemical water treatment
The chemical compatibility of several products for treatment of the central heating equipment has been tested on
the heat exchangers and the boilers. See below for the list with the corrosion inhibitors in preventative and curative
treatment for gas fired central heating boilers. If water treatment is required when filling the system or preforming
maintenance an inhibitor should be used. Follow the instructions provided by the inhibitor manufacturer when
adding it to the system. The following is a list of approved inhibitors.
Corrosion-/ Scale inhibitors and recommended suppliers
Producers -> Fernox Sentinel Sotin ADEY
Inhibitors Protector F1 / Alphi 11 X100, X500 Sotin 212 MC1+
Noise reducer X200
Universal cleaner Restorer X300
Sludge remover Protector F1, Cleaner F3 X400 Sotin 212
Antifreeze Alphi 11 X500
Tightness Leaker Sealer F4