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Centrometal Bio-Tec 25 テクニカル・マニュアル

Connection to the central heating system

Connection to the open central heating system
4.0.
FRESH AIR OPENING
Each boiler room must be equipped with an opening for supply of make up air
which is dimensioned in accordance with boiler output (minimum opening area
according to the below shown equation). Such opening must be protected with a net
or grate. All installation works have to be performed in accordance with valid
national and European standards. Boiler must not operate in flammable and
explosive environment.
A = 6,02 Q
5.0.
CONNECTION TO THE CENTRAL HEATING SYSTEM
All installation works must be made in accordance with valid national and European
standards. Boiler Bio-Tec can be built to closed and open central heating systems.
In both cases boiler must be fired with wooden logs. Installation has to be made, in
according to technical standards, by a professional who will be responsible for
proper boiler operation. The inlet pipe from the boiler to the central heating system
must not pass above the top back casing cover PD (Image 10), otherwise the
removal of the turbulators and cleaning of flue gas tubes is impossible. Before
connecting boiler to central heating system, the system has to be flushed to remove
impurities remaining after system installation. It prevents boiler overheating, noise
within the system, disturbances at a pump and mixing valve. Boiler should always
be connected to central heating system by connectors, never by welding. Image 1.
shows minimum distances required for boiler cleaning and maintenance.
5.1.
CONNECTION TO THE OPEN CENTRAL HEATING SYSTEM
If the boiler is aimed to be integrated into an open central heating system, one of
possible way how to connect the boiler to the system is shown on Scheme 1. In case
of Bio-Tec boilers, the boiler pump obligatory has to be connected to the boiler control
unit, in order to make turning on and off of the pump dependant on the temperature of
the water in the boiler. The functioning of boiler regulation is shown in Technical
manual ''Digital boiler regulation Bio-Tec''.
Connection to an open central heating system requires the implementation of an
open expanding vessel (OPC) above the level of the highest radiator. If the expansion
vessel is situated inside the non heated room, it has to be insulated. The volume of
the open expansion vessel is about 7% of the volume of entire installation. The boiler
has to be connected through one or more CAS water accumulators, depending on its
power. It is recommended to connect 50 liters water accumulation to each 1 kW boiler
power (i.e. for the 45 kW boiler minimal water accumulation should be 2250 liters).
The boiler should not be used without being connected to the water accumulation
device. It must be connected to the CAS water accumulator exclusively through an 3-
way thermic valve ESBE VTC 512 (maintains minimum temperature of return water
into the boiler above 60°C), VTC 531 (maintains minimum temperature of return
water into the boiler above 60°C), LTC 141 (maintains minimum temperature of return
water into the boiler above 60°C) or Laddomat 21 (maintains minimum temperature
of return water into the boiler above 63°C)
10
2
A - opening area in cm
Q - boiler output in kW
Technical manual Bio-Tec
Image 8. Fuel supply method
DR
Detail 1
RV
DR
Detail 2
RV
LEGEND:
-
DR
Wood log
-
LT
Upper boiler chamber
-
RV
Frame of upper boiler door
NOTE:
At filling the chamber with fuel (split logs) pay attention not to put fuel (split logs) on
the frame of top boiler door (detail 1). Fuel (split logs) has to be put so that it can be
gradually and freely move downward during burning, as shown in detail 2.
Image 9. Protective gloves
Protective gloves are obligatory!
Technical manual Bio-Tec
Fuel supply method
LT
DR
LT
23