Operation Description - Bosch THERM 1000 O Installation And Use Manual

8 | Instructions regarding the appliance

2.10 Operation description

Hot water
This heater is equipped with electronic automatic ignition, thus
its operation becomes simple.
For such it is enough to:
▶ Open the gas and water shut-off valves and check the
tightness of all the connections.
▶ Place the On/Off button ( Fig. 4, [3]) in the operating
position.
After this procedure, when opening a hot water point, the
ignition will occur automatically.
Spark shut-down when the ignition time is exceeded
If it is not possible to obtain the flame within the safety interval
stipulated, a gas shut-off is carried out in the valve.
The presence of air in the gas supply tube (initial start-up of the
appliance or start-up after long periods of inactivity) may cause
a delay in the ignition.
In this case and if the ignition attempt is too long, the safety
devices block the operation of the appliance by interrupting the
gas flow.
Safety shut-down due to an excessively heated water
temperature
The ignition unit detects the temperature of the water through
the temperature limiter placed in the combustion chamber. In
the event that it detects excessive temperature, it causes a
safety shut-down.
Re-start after safety shut-down
To put the appliance back into operation after having caused a
safety shut-down:
▶ Close and re-open a hot water point.
6 720 818 788 (2015/11)