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10. Circulation pump.
11. Automatic supplementing group
1. Before the building of the installation, it is recommended that the heat losses be calculated by a
specialist for the concrete case.
2. With an open system the installation must be connected to the atmosphere with an open expansion
vessel. Between the boiler and the expansion vessel no stop elements must be fixed.
3. De-aeration of each branch and element of the installation in each moment of its operation shall be
ensured.
GENERAL RULES AND RECOMMENDATIONS
EXEMPLARY DIAGRAMS OF
OPERATION OF A BOILER IN
AN OPEN SYSTEM
Open water heating system with an open
expansion vessel and a pump
Economical open gravitational self-adjusting
water heating system with an open expansion
vessel without a pump.
EXEMPLARY DIAGRAM OF OPERATION
OF A BOILER
IN A CLOSED SYSTEM
1. Manometer
2. Thermometer 120º С.
3. Electrical thermostat.
4. Thermal safety valve.
5. Automatic deaerator.
6. Safety hydraulic valve
7. Drainage.
8. Closed expansion vessel.
9. Filter.
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