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8.5
Programming the default setpoint
temperature
Fig. 26
▶ Press the buttons
to be memorized.
▶ Press the programming button for 3 seconds to save the
default set point temperature.
When the display stops blinking, the default set point
temperature is saved in memory.
Recall the default setpoint temperature
In order to select the default setpoint temperature, in case of a
change.
▶ Press the programming button for 1 second.
The display shows the temperature previously memorized and
this goes on to be the selected temperature.
9
Maintenance and service
DANGER:
▶ Always shut off the electrical power
supply, shut off the manual gas valve
and shut off the water valves whenever
servicing.
DANGER:
▶ Replace all dismantled joints and o-rings
with new ones.
Greentherm 9800 SEO 160/199 | SECO 199
6720806146-05.1V
and
to select the temperature
NOTICE:
▶ Inspect and clean the complete water
heating system once a year.
▶ Inspect the water heater and
components for wear or fatigue.
Immediately repair all faults to avoid
damage to the system.
Annual maintenance table
1. Inspect venting system
2. Inspect combustion chamber
3. Inspect burner
4. Inspect pressure relief
5. Inspect water filter
6. Heat Exchanger Descaling
7. Inspect condensate trap
Table 14 Annual maintenance
1) Proceed with burner cleaning if error code CE is displayed.
Check the flue exhaust for blockage (appliance is protected
against flue blockage).
2) Proceed with heat exchanger descaling whenever error
codes AA and E5 are displayed (appliance is protected
against over heating in case of scaling).
WARNING: Gas leakage!
▶ Replace burner seals in case burner is
disassembled. Consult spare part list at
www.boschheatingandcooling.com.
9.1
Annual maintenance
(To remove front cover, see page 9)
Venting System
•
Venting system - before removing the front cover inspect
vent opening in the front cover for any blockage or
restriction.
•
Observe burner flames during heater operation (front
cover must be removed). Burner flames should be steady
and blue. Yellow, inconsistent (bouncing) flames may be an
indication of poor ventilation or combustion air intake.
Inspect combustion air openings for blockage or debris.
Maintenance and service | 29
Every year
X
X
1)
X
X
X
2)
X
6 720 817 281 (2017/05)
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