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KALVIS - 2 - 70 EN 2022.08.22
•
Boiler can be connected into a heating system with membrane expansion reservoir,
vessel's permissible operation pressure could be up to 10 bar, air pressure should be
equal to the system pressure, for example 0,6 bar. Prepares the opened type heating
system, instead of membrane expansion vessel, there could be used the expansion
vessel of opened type.
•
If boiler operates at the power less than the nominal power specified in the
technical specifications, the efficiency of the boiler reduces, environmental indices
become worse. Therefore it is recommended to use the boiler connection diagrams
with accumulation tank.
Notice. We not recommend to install the boiler with accumulation tank having the
opened type heating system. The boiler intensive firing, when temperature is
rising close to 80 °C, may cause the water boiling inside of boiler, may
appear as well the extraneous noise.
Attention! Having a risk of freezing or within the boiler repair, the water from the
system is drained over to drain socket (25) (see picture 1).
6.4.
Air draught regulator installation
The air draught regulator (
32
) (
see picture 1
) (
hereinafter referred to as regulator
)
is screwed in, for sealing using oakum or sealing tape.
Connect the chain with primary air supply dampers (
27
) (
see also chapter 7.3
).
6.5.
Connection of the boiler cooling system
According to the requirements of LST EN 303-5 standard par. 4.1.5.11.3, for
boiler operation it is necessary to install the devices used for dissemination of heat
excess, if, for the some reasons, the normal heat take-away is disturbed in the
heating system, in order to not to exceed the max boiler water temperature.
Note. For the boilers, operated in open expansion system, it is not necessary to install
the device for heat surplus dissipation in the boiler, because heat surplus is
dissipated in the form of steam through open expansion vessel.
For the boiler protection against to overheating, it is possible to install into the its
housing the emergency cooling coil. When the boiler heats over 95
C, temperature
valve opens and cold water, flowing from water supply through the coil, cools the
boiler. The cooling water is then directed to the sewage through pipes no thinner than
those installed on exit from the coil (water has to flow freely to the sewage).
During cooling coil installation:
•
after having been unscrewed the screws, take off the cover from the trimming
shield (or brake perforation away);
•
after having been unscrewed the nuts, take the blind away;
•
replace the sealing ring;
•
insert and screw in the cooling coil (
according to directions in the figure
).
Attention ! Work carefully - the edges of the decorative shield's opening may become
sharp, do not injures.
Summary of Contents for K-2-70
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