BULTEH 2000 Ltd.
Industrial Area 19, STARA ZAGORATel./Fax:(359 42) 6260 19, 603 449; Tel. (359 888) 714 711;
14
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Continuous Sound signaling:
failure of the installation
-
Beep (1 second) might indicate :
the end of the step (if preset by the
operator) signal for an interruption which requires operator’s intervention.
The system works in automatic and manual mode, which is set up and
monitored by the operator via the control panel.
4.2.1.6 Electric heaters 4 pcs. x 5kW:
Electric heaters (
pic.15
) are included in two heating circuits / collectors of
10Kw each (
pic.14/pos.1 and 2
).
Pic.14
pic.15
Electric heaters are fitted in two U-shaped collectors (
pic.14/pos.1 and 2
),
made of stainless steel. Each collector has a drainage outlet closed by a cap. Each
collector has two heaters with installed power of 5kW. If necessary (when a
consumer of 21 kW cannot be included in the network) two of the heaters are
switched off, and the installed power of the plant becomes 11kW. The configuration
of electric heaters that will work two or four in a circuit is done using switch
(
pic.12/pos.4
), mounted in the electric box of the plant.
4.2.1.7 Expansion vessel with 8L volume:
For compensation of the increased water volume during the heating an 8L
hydraulic accumulator is installed in the hydraulic system.
The vessel has rubber
membrane that divides the vessel into two parts - the part where the working fluid of
the hydraulic system (water) is and the part that is filled with inert gas. The pressure
of the inert gas should be 2.4 to 3 bar and is set by the manufacturer.
Protection
The hydraulic system of the plant is automatically filled with water under
pressure between 1.3 and 1.5 bar. To create and maintain this pressure a reducing
valve is used (
pic.1/pos.2
). When the water pressure in the hydraulic system is
lower than the rated pressure, the pressure sensor (
pic.1/pos.3
) provides a signal
to the control panel. Control panel terminates the program. To prevent the plant of
heating of working fluid up to inadmissible temperature (higher than 110
°C), if the
control panel fails to work, an emergency temperature sensor of automatically
unrecoverable type is provided - (
pic.9/pos.1
).
To protect the hydraulic system of the plant from pressure higher than
permissible a safety overflow valve (
pic.3/pos.4
) is included in the hydraulic
system.
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