8
Fig.
№
. 8
Examples of the open expansion tanks connection
3.4
Equipment for heat exhausting – accumulating reservoir
The boiler has to be operated with an accumulating reservoir.
Calculation of the smallest capacity of the accumulating heat exchanger,
V
sp
= 15T
b
x Q
N
(1-0,3 x (Q
H
/Q
min
))
where:
V
sp
accumulating reservoir capacity in liters
Q
N
nominal heat power in kW
T
b
combustion time in hours
Q
H
buildings’ heat load in kW
Q
min
smallest heat power in kW
The sizes of the accumulating reservoir have to be determined on the basis of the boiler power and the used fuel. The biggest capacity has to
taken into consideration, whereas the minimum used capacity of the reservoir has to be 300 l.
In case that the reservoir is fully charged, it is necessary to shut down the boiler and heat up by heat from the accumulating reservoir. After the
heat is spent in the reservoir, put the boiler into operation again. The accumulating reservoir enables provision of heat comfort and at the same
time the boiler operation.
ATTENTION! Failure of it will cause extreme pollution of the boiler drum.
Hydraulic schemes of the boilers with an accumulating reservoir are at disposal in the project materials of Viadrus at www.viadrus.cz.
4
Location and installation
4.1
Regulations and guidelines
The solid fuel boiler may be installed by a company holding a valid certification for its installation and maintenance. For the installation, a project
must be elaborated in accordance with applicable regulations. Before the boiler installation to an older heating system, the installation company
must flush (clean) the whole system. The heating system must be filled with water that meets the requirements of CSN 07 7401 and
especially its hardness must not exceed the required parameters.
Tab.
№
. 6
Recommended values
Hardness
mmol/l
1
Ca
2+
mmol/l
0.3
concentration of total Fe + Mn
mg/l
(0.3)*
*) recommended value
ATTENTION!!! The manufacturer does not recommend to use antifreeze.
In case of reaction of the two-way safety valve, when there could be refilled water that does not conform to CSN 077401, it is
necessary to adjust water in the system so that it again conforms to this standard.
a) to the heating system
CSN 06 0310
Heating systems in buildings – Design and installation.
CSN 06 0830
Heating systems in buildings – Safety devices.
CSN 07 7401
Water and steam for thermal energy equipments with working pressure up to 8 MPa.
EN 303-5
Boilers for central heating – Part 5: Boilers for central heating for solid fuels, manually and automatically
stocked, with nominal heat output of up to 500 kW – Terminology, requirements, testing and marking.
b) on the chimney
CSN 73 4201
Chimneys and flues – Design, implementation and connection of fuel consumers.
c) regarding the fire regulations
CSN 06 1008
Fire safety of heat installations.
EN 13501-1 + A1
Fire classification of construction products and building structures – Part 1: Classification using data from
reaction to fire tests.
d) to the system for the HW heating
CSN 06 0320
Heating systems in buildings - Hot water preparation - Design and projection.
CSN 06 0830
Heating systems in buildings – Safety devices.
CSN 75 5409
Internal water piping.
1.
Heat source
2.
Expansion tank
3.
Safety valve
4.
Expansion pipe
5.
Overflow pipe
6.
Filling pipe
7.
Water level limiter
8.
Return pipe
