21
Boiler equipment
The boiler PROTHERM 20 (30, 40, 50)
KLZ comprises the following parts:
- cast iron boiler body with thermal
insulation.
- burner plate including gas path and
starting equipment,
- combustion gas catcher with thrust
breaker,
- hydraulic construction,
- boiler casing with control panel,
- hot water tank.
Cast iron boiler body
This is composed of elements and serves
simultaneously as a combustion chamber
(including combustion gas paths) and a
water space (including water paths). The
elements are lateral (“right” and “left”) and
central (of one type). The connection of
the elements creates the boiler body with
the relevant size (both of the combustion
chamber and the water space). The
assembled boiler body is connected to
a hydraulic construction and insulated
against heat loss and radiation. It is also
fi tted with clips for fi tting the sensors of
the thermostats and thermometer and
clips on legs serving for connection with
the boiler construction, in which the tank
is placed.
Burner plate
This is fi tted with a gas pipe section, its
own burner pipes and a starting device.
According to size (which corresponds to
the size of the boiler body) it holds 2 to
4 burner pipes and the entire gas path.
The gas path is formed by a pipe section
of the gas connector, which ends with an
inlet into the combined gas armature. The
combined gas armature regulates gas
infl ow into the boiler depending on the
required and attained operational states
of the system (i.e. of the boiler and heating
system together); the outlet from this is
the section of the gas piping of the burner
plate fi nished with 2 to 4 jets (one on each
burner pipe).
The burner is started by an electrical
spark. An automatic control device is
used to start and maintain running, which
is connected directly with the combined
gas armature manufactured by the same
company to form a single unit, which
also reduces all requirements for mutual
interconnection.
Combustion gas catcher
This is a plate cover which contains the
CDCS thermostat; it is connected directly
to the thrust breaker and fi nished beyond
this with the combustion gas collector
of the boiler (for connection of exhaust
fl
ue). The CDCS – chimney draught
control system – is based on monitoring
the temperature of combustion gases on
exhaust from the boiler; in the case of
accumulation of these gases in the boiler
(i.e. insuffi cient exhaust) it is activated
and switches off the boiler (closes the gas
inlet into the burner). The combustion gas
catcher is fi tted with a detachable cleaning
jacket, which is accessible after removal of
the upper part of the boiler casing (upper
cover).
Hydraulic construction
This is a system of piping with a pair of
pumps, backfl ow clack valves and safety
elements, i.e. with an expansion vessel for
the hot water circuit (with nominal content
of 10 l), a safety valve for the hot water
circuit (with nominal opening pressure of
3 bar) and automatic de-aeration by valve.
The hydraulic construction also includes
end pieces for connection of the boiler.
Preparing for boiler installation
