SOLARFOCUS maximus 150, Руководство по эксплуатации

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2 Safety information
4.2 Safety devices
Heat dissipation
– This function of the boiler control is a safety device
that prevents overheating of the boiler.
– Functioning: If the boiler temperature exceeds the
set
Heat dissipation maximum boiler temperature
(in the service menu - General Settings ), all pumps
relating to the energy consumer units (e.g. heating
circuit, DHW tank, buffer tank, etc.) will be swit-
ched on and the heating circuit mixer opened. In
this way, energy is drained from the boiler and it
may be possible to prevent other safety devices
tripping.
–
If the boiler temperature falls below the set Heat
dissipation maximum boiler temperature minus
1°C again, the pumps and mixers will be operated
in standard mode again.
Thermal overload protection
– The thermal overload protection prevents an uncon-
trolled increase in temperature and pressure of the
boiler.
–
Functioning: At a boiler water temperature > 95°C,
the valve opens and directs cold water through the
two series-connected safety heat exchangers.
This lowers the temperature of the boiler and avo-
ids the need for further safety precautions or equip-
ment damage.
► Install thermal overload protection > 21
Overtemperature reset (OTR)
The safety temperature limiter (STL) is a safety device
that prevents overheating of the boiler.
Functioning: The STL stops the heating process at a
boiler temperature ~95°C (exclusively electrical func-
tion; fuel and air supply are interrupted).
After tripping, the STL must be manually released
again by unscrewing the black sealing cap
1 and pres-
sing the button as soon as the boiler temperature falls
below 60°C.
If the safety overtemperature reset trips, this is indi-
cated in the boiler control display.
Fig. 2-2: Unscrew the closure cap
►
Install overtemperature reset > 28
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 hea-
ting system.
– Functioning: The valve opens when the system
pressure exceeds 3 bar. Water/steam are dischar-
ged into an open drain via a discharge line, which
avoids consequential damage to the heating sys-
tem. The valve is closed during normal operation.
– For normative specification see EN 12828.
Fig. 2-3: Safety valve integrated into boiler safety group
► Install safety valve > 20
Operation manual maximus 5