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ÜKYP/YP Automatic Fuel Loading, Central System Heating Boiler Usage and Maintenance Manual
RULES FOR HEATING INSTALLATION
Recirculation pump:
A pumped system with a pump of sufficient capacity is
recommended. The capacity of the required pump is
determined by taking into account the resistances that
occur in the installation. To determine the correct
position of the pump in the system, the wiring diagrams
given in the manual should be referenced. The pump
stage should be adjusted by taking into account the
resistances in the installation.
In addition to the schematic installation connection
shown in high-capacity boiler installations, a system with a backup pump should be made. By-pass line
must be connected directly to the auxiliary pump line, like the primary pump. Boiler inlet and outlet
lines must be connected with collectors. In order to prevent the system from making air, in open
expansion installations, the head of the pump must be less than the height of the expansion.
In the installation of the circulation pump, the fact that the electrical connections do not come down
will eliminate the problem of possible water penetration into the pump. In order to prevent the pump
shaft from pressing on the body or outer cover during operation, vertical mounting of the shaft should
be avoided.
Expansion tank:
In hot water heating systems, when water is heated from 10ºC to 90ºC, its volume increases by 3.55%
of its initial volume. "Expansion tanks" are used to take this expansion depending on the temperature
in the water. Expansion tanks also fulfill the safety of the system, that is, the pressure not to rise, and
the necessary water support to the system. Expansion tanks are divided into two:
Systems with closed expansion tanks:
Closed expansion tanks are manufactured with air and nitrogen pressure before they are attached to
the system. However, it is still necessary to check before assembly. The pressure in the expansion tank
is the pressure of the system. When the expansion tank heating circuit is active, the water volume that
expands with the heating of the water is collected in the expansion tank. Then, when the temperature
drops, this water returns to the installation and balances the pressure of the installation. Compared to
open systems; Since there is no piping process up to the top of the radiator, crushing and pouring will
not be done, there will be no heat loss since there will be no open container to the outside
environment, there will be no corrosive part of the system since there is no open point to the air, and
there will be no water loss due to evaporation as the system is closed.
In closed expansion tanks, the decrease of water in the system can be observed with a manometer.
Manometer is a pressure gauge. When the water in the boiler is cold, it should show 1-1.5 bar pressure.
As the boiler water heats up, the pressure will increase.
Boilers to be installed with closed expansion tank must be installed with appropriate safety
valve and automatic air vent.
