Operational Instructions; Regulation; Operating Instructions - Bosch Therm 8000 S Installation And Operating Instructions Manual

2.10 Operational instructions

Hot water
Open the gas and water valves and ensure that all joints are
hermetic.
Place the principle switch (Fig. 4, [1]) in the operating position
(chapter 4.3), so that the appliance is quickly ready for use.
When a hot tap is opened, the water flow sensor should be in
(Fig. 2, [2]) send a signal to the control unit. This signal
initiates the following:
• The fan starts working
• Simultaneously, sparks are produced and the gas valve
opens.
• The burner lights
• The ionisation electrode controls the state of the flame.
• The water temperature is controlled automatically by the
sensors/controllers according to the temperature selected.
Security cut-off when safety period is surpassed
If a flame is not achieved within the stipulated security period
(35 sec), a security cut-off will occur.
The presence of air in the gas inlet pipe (when the appliance is
used after long periods of inactivity for example) may delay
ignition.
4

Operating instructions

Fig. 4
[1] Main switch ON/OFF
[2] Reset key
[3] Program key
[4] LCD panel
[5] Temperature increase key/ programming key
[6] Temperature decrease key / programming key
Therm 8000S
In this case, if the attempts to ignite go on too long, the security
mechanisms prevent operation.
Security cut-off due to excessive water heating
The control unit detects the heating temperature via a NTC
resistor located in the hot water exit tube and the temperature
limiter located in the heat exchanger. If it detects an excessive
temperature it provokes a security cut-off.
Restarting after security cut-off
To restart the appliance following a security cut-off:
▶ Press the reset key (Fig. 19).
3

Regulation

Any local by-laws and regulations pertaining to installation and
use of gas-heated appliances must be observed. Please refer to
the laws that should be attended in your country.
The installation may only be carried out by
registered installers and shall comply with the
requirements of SANS 10087-1.
[7] LED
Regulation | 9
6 720 680 174 (2014/05)