Installation guide

18
The boiler is designed for combustion
gases to be discharged (via a chimney
inlet) with a minimum stabilised thrust of 2
Pa. The boiler is connected to the chimney
inlet by a fl ue – for the boilers PROTHERM
20, 30 KLZ with Ø 130 mm, for the type
PROTHERM 40 KLZ with Ø 150 mm and
for the type PROTHERM 50 KLZ with Ø
180 mm.
Important: It is prohibited to place any
objects restricting the combustion gas
fl ow inside the fl ue (e.g. various types of
heat exchangers to utilise their residual
heat). The combustion gas exhaust fl ue is
not part of the boiler accessories.
Construction of the combustion gas
exhaust fl ue as well as that of the chimney
must comply with the requirements of STN
06 1610 and STN 73 4210. Compliance
with the principles specifi ed by these
norms will prevent undesirable phenomena
from occurring, such as excessive cooling
of the combustion gases, penetration of
dampness into masonry and fl uctuations
in the chimney thrust, and thus prevent
undesirable effects on the functioning of
the boiler.
The boiler takes combustion air from the
space in which it is installed. The minimum
size of such a space requires that there is
0.8 cu.m of free space per 1 kW of boiler
output, and in addition it must be possible
to ventilate the space directly. If direct
ventilation is not possible 2 cu.m of free
space is required for each 1 kW of boiler
output.
For discharge of combustion gases from
PROTHERM 20, 30, 40, 50 KLZ boilers it
is possible also to use the supplementary
device “superstructure PROTHERM PT 20
(30, 40) POLO – TURBO”, which ensures
the forced discharge of combustion gases.
It enables the operation of cast iron
boilers in cases where it is not possible
to use regular discharge of combustion
gases into a chimney. The superstructure
is designed for direct connection to the
combustion gas collector. The outlet of
combustion gases from the superstructure
is adapted for connection of single-
shell exhaust piping up to a length of 10
equivalent metres (1 equivalent metre = 1
metre of even section or 1 90° joint).
Mounting the superstructure onto the
boiler and putting into operation may
be performed only by an authorised
organisation according to Public Notice of
the Slovak Bureau of Occupational Safety
no. 74/1996 Coll. It is essential to abide
by the safety prescriptions during service
interventions into the superstructure when
this is connected to an electrical power
source (even when the mains switch is
off)!
The boiler is constructed for operation
with heating water up to an overpressure
of 400 kPa (4 bars), which compiles with
STN 07 7401 (this water must not under
any circumstances be acidic, i.e. its
pH factor must be > 7 and must have a
minimal carbonate hardness).
With regard to their properties, which
are unsuitable for operation of the boiler,
use of antifreeze compounds is not
recommended. This primarily concerns
reduction of heat transmission, large
scale expansion, ageing and damage to
rubber elements. If no other possibility
exists for reliably preventing freezing of
the heating system within the specifi c
conditions, failure to meet any of the
functional parameters or any defects of
the boiler as a consequence of use of
antifreeze compounds cannot be covered
by the boiler warranty.
The boiler may be used also in systems
with an open expansion vessel. In such a
case it is necessary to ensure an additional
check upon installation and if applicable
also adjustment of the factory setting of
the emergency thermostat temperature
– see point 3.4.
It is necessary to set the expansion vessel
with regard to the system – in the sense of
STN 06 0830 this ensures that the heating
system itself is secured up to a total
volume of 180 litres of water against quick
pressure fl uctuations and undesirable