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Sufficient clearance space must be provided around the boiler to enable manipulation of the boiler and its accessories, both when
being installed and during operation.
The boiler is put on the floor (or a special base plate). The floor must have at least usual load capacity and must not be slippery.
The area at the boiler must be dry-cleaned (such as vacuum cleaning). The boiler must not stand on a flammable base – if the floor
is flammable, a special flameproof, thermally insulating base plate must be used; its dimensions must be, in all directions, at least
100 mm larger than the floor projection of the boiler.
The boiler with the casing needs a doorframe clearance width of at least 65 cm.
The following clearance distances are prescribed:
– 100 mm from flameproof to moderately flammable materials;
– 200 mm from flammable materials (such as chipboard, polyurethane, polystyrene, polyethylene, expanded PVC, synthetic
fibre, cellulose, asphalt board, rubber, etc.).
The boiler is designed for operation in a normal environment (temperatures b5 and +40°C, humidity up to 85%,
depending on the temperature).
The boiler must not be installed in rooms with a bathtub, or in bathrooms, washing areas and shower rooms, in zone
0, 1 or 2. It cannot be installed in zones 3 in which water streams are used for cleaning (such as bathhouses, shower
and washing rooms in schools, factories, sporting facilities, public facilities, etc.)
If the boiler is installed in allowed zones, the relevant standard also requires adequate protection form electric shock.
The boiler must not be installed in an environment in which the burner tubes could be clogged with impurities or biological
factors (such as small rodents, etc.).
In practice, situations may appear in which the users must apply necessary precautions:
a)
Preventing the boiler from switching on (also accidental) when inspecting the chimney, flue-gas duct, water and gas
piping – i.e., electricity supply to the boiler must be stopped in addition to using the boiler switch (e.g., by unplugging);
b)
Stopping the boiler whenever flammable or explosive vapours appear (even if temporarily) – such as vapours of
flooring glue, paints when surface finishing, gas leaks, etc.);
c)
If it is necessary to discharge water from the heating system, it must not be dangerously hot;
d)
If there is a stoppage of the heating system (boiler or circuit) which might lead to water leak from the boiler exchanger,
or if the exchanger is filled with ice, no attempts to start the boiler should be made until normal operating conditions
prevail.
3.9. Electric Connections of Boiler
Electric connection of the boiler to the grid is by three-wire flex and plug. The socket for the plug must comply with the relevant
standard and have the grounding pin (connected to a PE or PEN cable (yellow-green).
The boiler must be connected to the protective grounding wire; the plug in the socket must always be accessible without obstacles.
Use of adaptor plugs, extension cords, etc. is prohibited. The boiler is protected by a tube fuse (T 1.6 A / 250 V), installed under
the front cover panel.
Only a person with adequate electrical-engineering qualifications can be allowed to install the socket and the thermostat
(thermostat installation requires utilization of the boiler's internal electric cabling); the same requirements apply to servicing the
electric part.
Before any work commences on the electric part, the boiler must be unplugged.
Only no-voltage thermostats or regulators can be used for regulating the boiler, i.e., they must not bring in any foreign
voltage. A specialised service centre should assess suitability of a particular regulator.
3.10. Regulator Connection
There is a terminal board in the boiler, which is under the control panel. A room thermostat with no-voltage contact switch is
connected to the boiler by a power cable. If a regulator requiring 230 V supply (bimetal with warm-up resistor) is used, it must be
connected by a three-wire power cable to the boiler. The boiler manufacturer is able to supply suitable regulators, if required.
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