4.
Installation
4.1
Water connections
4.1.1 General provisions
The BioLyt wood pellet boiler is designed and approved
for use as a heat generator for domestic hot water
heating systems in accordance with EN12828 and with
permissible flow temperatures of up to 75 °C.
4.1.2 Safety equipment
The safety equipment (safety valve etc.) must meet the
requirements of EN12828. The pressure expansion tank
must be configured according to the specific heating
system, water volume and hydrostatic pressure.
4.1.3 Return temperature control
On systems with a buffer storage tank, a mixing valve
must be installed to ensure that a minimum return
temperature of 40 °C is maintained. Lower operating
temperatures have a detrimental effect on the service
life of solid fuel fired boilers due to the condensation on
the heating surfaces of the water vapour contained in the
flue gas.
This condensate contains a variety of aggressive
components which promote corrosion and soot formation
if this condition occurs frequently.
This can be avoided by maintaining a flow temperature
of above 60 °C during continuous operation and ensuring
that the return temperature never drops below 40 °C.
This eliminates the risk of the temperature falling below
the dewpoint on the return side.
4.1.4 Insulation of the heat distribution system
When performing initial installation or replacement of or
major repairs on heat distribution systems and hot water
pipes including fittings, technical measures must be
implemented to limit heat transfer (Table 1).
4.1.5 Additional installation information
Automatic filling of the pellet container
When deciding on the placement of the BioLyt boiler,
you must take into consideration the space requirements for
the automatic conveying of pellets from the corresponding
storage room. The pipelines must not be in the way here.
buffer storage tank
The use of a small load balancing storage tank (200 litres)
ensures optimum operation of a pellet heating system
and is recommended. For over-dimensioned boilers
(≥ 50 %) or in those cases where parts of the heat supply
system are frequently disconnected, a buffer storage tank
is mandatory.
A buffer storage tank will also be necessary in many
cases for convenient water heating or the integration
of a solar heating system. Recommended capacity:
10 - 30 litres/kW boiler output. Detailed dimensioning of
the system is necessary.
Combustion air supply
An adequate combustion air supply is a prerequisite
for safe and economical operation. It is very important
to ensure that the combustion air is clean and free from
halogen compounds. These are present, for example,
in spray cans, varnishes, glues, solvents and cleansing
agents.
Flue gas system
A moisture-resistant duct is required. Minimum draughting
requirement 5 Pa.
Damper and explosion damper
A combined draught-explosion damper between boiler
and flue is mandatory.
Table 1
Pipeline and fitting types
Minimum insulation thickness based on a heat conductivity of
0.035 W/(mK)
1
Pipes/ fittings in non-air-conditioned rooms
2/3 of the pipe diameter, but at the most 100 mm
For pipes/fittings in wall and ceiling openings, in areas where pipelines
intersect, in central network distributors
1/3 of the pipe diameter, but at the most 50 mm
Pipelines/ fittings in air-conditioned rooms
1/3 of the pipe diameter, but at the most 50 mm
Pipes in the floor structure
6 mm (does not apply if pipes are laid in the impact sound insulation in
the case of ceilings to air-conditioned rooms)
Transmission lines
No requirements
1
At an average temperature of 10 °C; In the case of materials with a heat conductivity other than 0.035 W/(mK), the minimum insulation thicknesses
must be calculated using the methods contained in the technical regulations.
23
4 211 326 / 01
InSTALLATIOn
Summary of Contents for 30-BioLyt 13
Page 53: ...53 4 211 326 01...
