3 Warranty, guarantee, liability
–
After tripping, the overtemperature reset must be
manually released again by unscrewing the black
sealing cap
1
and pressing the button as soon as
the boiler temperature falls below 60°C.
–
If the overtemperature reset trips, this is indicated
on the boiler control display.
Abb. 2-2: Position of the overtemperature reset
Thermal overload protection
–
The thermal overload protection prevents an
uncontrolled increase in temperature and pres-
sure 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 avoids the need for further safety pre-
cautions or equipment damage.
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. 2-3: Safety valve integrated into boiler safety group
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.
Operation manual
maximus L
7
