Inspection and maintenance
31
Condens 7000 WP – 6721842519 (2022/03)
Menu Reset
Table 13 Menu Reset
Menu Demo mode
Table 14 Menu Demo mode
9.4.3
Thermal disinfection
To prevent hot water from becoming contaminated by bacteria such as
legionella, we recommend thermal disinfection after long downtimes.
CAUTION
Risk of scalding.
During thermal disinfection, discharging unmixed hot water can cause
serious scalding.
▶ Only use the maximum adjustable hot water temperature for thermal
disinfection.
▶ Inform occupants of the premises of the risk of scalding.
▶ Perform thermal disinfection outside of the normal operating times.
▶ Do not discharge DHW unmixed.
Proper thermal disinfection involves the DHW system including the
draw-off points.
▶ Set the thermal disinfection in the hot water program of the heating
controller (
heating controller operating instructions).
▶ Close DHW draw-off points.
▶ Set any DHW circulation pump to continuous operation.
▶ Wait until the maximum temperature is reached.
▶ Open all DHW draw-off points, from the nearest to the one furthest
away, and draw off hot water until hot water at a minimum of 70 °C
has flown from all draw-off points for at least 3 minutes.
▶ Restore the original settings.
10
Inspection and maintenance
WARNING
Risk of explosion
▶ Close the gas valve before working on gas-carrying components.
▶ After completing the work, check the tightness of all gas-carrying
components.
CAUTION
Flue gas poisoning
▶ Check the tightness of all flue gas routing parts once the work is
complete.
CAUTION
Electric shock
▶ Avoid contact with the burner control unit, fan or pump when
measuring and adjusting the boiler. These are 230 V parts.
▶ Switch off the boiler before working on electrical parts.
CAUTION
Malfunctioning safety sensors
The function of the safety sensors in the installation room (such as CO,
CO
2
, and gas detectors) must be regularly checked.
▶ Check the function of relevant safety sensors during inspection or
maintenance.
▶ You can read about how to perform the check in the instructions for
the safety sensor.
▶ Defects at relevant safety sensors must be rectified immediately.
10.1
Important notices
You will need the following measuring devices and tools:
• Pressure gauge with a measurement accuracy of 0.01 mbar.
• Flue gas analysis measurement device.
• Cleaning brush with plastic bristles.
▶ Only install original spare parts.
▶ Replace all loose gaskets when carrying out the work.
Inspection and maintenance interval
To ensure the wall mounted gas condensing boiler works correctly and
safely, the following intervals must be adhered to:
•
Inspection
: annually,
•
Maintenance
: every 2 years or following a burner runtime of 4000
hours (depending on which occurs first).
The following tasks must be performed when carrying out an inspection
or maintenance:
Table 15 Work to be carried out
Meu item
Settings/adjustment range
Remark/restriction
Default setting
Restore?
All settings of the heat source, and the control unit if
applicable, are reset to the respective default setting. The
system needs to be re-commissioned following this reset.
Service display
Reset?
Resetting the maintenance
Fault history
Delete?
Reset the maintenance first. The fault history of the heat
generator, and control unit if applicable, is deleted. If
currently a fault is present, it is immediately entered
again.
Menu item
Settings/adjustment range
Remark/restriction
Demo mode
• Yes
•
No
▶ To exit Demo mode: switch the device off and back on
at the ON/OFF switch.
Inspection Maintenan
ce
General work
§ 10.2
Cleaning
Check
measurements
