9
The diameter of vertical standpipe above the boiler and the diameters of all of the
pipelines of the heating system should meet the project documentation requirements of
your heating system. The height of vertical standpipe above the boiler should be no less
than 2 m. It is a reason for abandoning a use of the circulation pump.
Irrespective of the way of connecting the boiler to the heating system, the boiler
should be fastened to a wall in the process of the assembly.
Some of the key diagrams of the heating systems arrangement are depicted in
Figures 1, 2, 3. For the easy maintenance of the heating system it is necessary to locate the
shutoff valves on the pipeline right after the surge tank and before the inlet connection of
the boiler (see Figures 1, 2, 3).
It is strictly forbidden to install valves and other regulating or locking
mechanisms on the pipeline between the boiler outlet connection and the surge
tank.
Electrical installation of the boilers and automatics
Three-phase electrode boilers are connected to the four-wire three-phase power
network the voltage of which is equal to 380 V. Industrial frequency of the current is equal
to 50 Hz. N is a neutral conductor, and PE is a protective conductor of grounding. N and PE
conductors are decoupled.
Single-phase electrode boilers are connected to the single-phase power network the
voltage of which is equal to 220 V. N is a neutral conductor, and PE is a protective
conductor of grounding. N and PE conductors are decoupled.
Connect the electrode boiler to the power network in accordance with the project
documentation of your heating system and the chosen model of the automatics produced by
the “Firma “Galan” Joint-Stock Company.
The observing of the “Phase-Null-Ground” is obligatory!
Cross section of all wires should be similar and no less than a value specified in the
Table 1 (electromechanical model of the automatics) of the given Operation manual or no
less than a value specified in the operation manual of the chosen electronic model of the
automatic control unit of the heating system.