3 Technical requirements
Safety valve (to protect against excess pres-
sure in the system)
–
The safety valve
1
is a safety device for protecting
against overpressure in the water circuit of the
heating system.
–
Functioning: The valve opens when the system
pressure exceeds 3 bar. Water/steam are dischar-
ged into an open drain via a blow-off line, which
avoids subsequent damage to the heating sys-
tem. The safety valve is closed during normal ope-
ration.
–
For normative specification see EN 12828.
Abb. 2-4: Safety valve integrated into boiler safety group
►
Install safety valve
Water shortage safety
The pressure sensor
in the heat exchanger ful-
fils the water shortage safety function (in accordance
with EN 12828 standard).
At a water pressure <0.5 bar the boiler must not start.
A message is displayed in the boiler control (
system
pressure too low
).
Emergency OFF switch
–
The emergency OFF switch is a manually ope-
rated safety device. The burner and the fuel sup-
ply to the boiler are stopped. Circulation pumps
remain in operation to dissipate heat and cool the
boiler.
–
The switch must be installed outside the boiler
room in a safe place that is easy to access.
►
Install EMERGENCY OFF switch
Temperature monitor in the fuel storage
room (TM)
–
Required according to guideline TRVB 118 H for
wood chips, depending on system design, hea-
ting capacity and fuel storage quantity.
–
Functioning: On the channel of the fuel delivery
auger, a temperature sensor of a protected
design must be installed in the area of the wall
penetration (inside the storage room). When a
temperature of about 70°C is exceeded, the
warning device is (optically or acousti-
cally)triggered.
–
Art. No.: 6565 and 6567
►
Install temperature monitor
Automatically triggered extinguishing
device (ATED)
–
This extinguishing device serves to automatically
suppress burn-back within the feeder. Due to the
proper nature and location of the fire detection ele-
ment, burn-back must be reliably detected and
the extinguishing device must be triggered auto-
matically (this must be ensured even in the event
of a power failure).
–
Functioning: If at the temperature sensor
1
the
temperature exceeds 50°C (direct extraction) or
95°C (downpipe extraction), the valve opens and
floods the feeder channel with water through the
connecting pipe
2
.
Abb. 2-5
1 Immersion sleeve for temperature sensor (IG)
2 Connection for water discharge (AG)
12
Installation manual
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Содержание maximus L 150
Страница 16: ...Front Abb 2 10 Side view Abb 2 11 3 Technical requirements 16 Installation manual maximus L ...
Страница 44: ...11 Annex 11 1 Mounting boiler covers overview Abb 2 72 Abb 2 73 11 Annex 44 Installation manual maximus L ...
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