Metal-Fach SMART EKO-CARBON Series, Эксплуатационная и техническая документация, Страница: 14 / 38

13
14. Connection of boiler to heating
installation in closed-loop system
(INSTALLER)
ATTENTION!
The central heating system in the open system must meet the requirements set in
the PN-EN 12828:2006 norm- Heating systems in buildings and the PN-EN 303-
5:2012 Solid fuel boilers with manual and automatic feeding.
When installing the boiler in the closed system, it is important to use elements that prevent
overheating, excessive increase of pressure and use the controller of temperature during burning
process.
In the SMART EKO-CARBON boilers , there is a copper coil that is installed inside the boiler
exchanger. The coil is made from ribbed copper pipe.
Tab. 14.1 Examples of devices enabling heating systems protection
Part Description
STB Safety temperature stop with manual return to start position
Cooling coil
Cooling coil cools the system when the temperature exceeds
97C
BVTS Valve
BVTS valve prevents the flame from returning back into the
solid fuel feeder through flooding the fuel in heightened
temperature situation.
Pressure expansion tank Preventing heightened pressure
Safetly fixtures It includes safety valve, manometer and deaerator
ATTENTION
The boiler installed in the closed system must be equipped with all the safety
devices listed in Tab. 14.1.
ATTENTION!
The cooling coil should be connected to the water system. The power supply cannot
be the pressure tank unit because it needs power supply for its operation.
Schematic 14.1 Safety schematics of the boiler with the cooling coil and thermal
protection
The exchanger that is installed in the water coat is connected to the cold water cable, that
flows through it only when the thermal valve opens up when it exceeds the given temperature.
The water goes through the exchanger and receives the heat from boiler water coat and then is
led to the sewage system as hot water might damage it.
The exchanger is able to lower the temperature in the water coat by few degrees within
several seconds. If the temperature in the boiler coat drops below the set temperature then the
valve cuts off the water to the exchanger. In this solution, the high quality of the exchanger and
valve allows several consecutive switch off and on of the protection
In the solution with a built in safety coil e.g thermal protection is used (Schematic 14.2).