Maintenance - Bosch Condens 8300i W Operation Manual

7

Maintenance

HInspection, cleaning and maintenance
The user is responsible for ensuring the heating system is safe and
environmentally compatible.
Non-existent or improper inspection, cleaning and maintenance may
result in personal injury, including danger to life or material damage.
We recommend that you enter into a contract covering an annual
inspection and responsive cleaning and maintenance with an approved
contractor.
▶ Have work carried out only by an approved contractor.
▶ Have the heating system inspected by an approved contractor at least
once a year.
▶ Have any required cleaning or maintenance work carried out
immediately.
▶ Have any defects in the heating system remedied immediately,
independent of the annual inspection.
Cleaning the casing
Never use aggressive or corrosive cleaning agents.
▶ Wipe the casing with a damp cloth.
Check the operating pressure of the heating system
The standard operating pressure is 1 - 2 bar.
Should a higher operating pressure be required, ask your contractor.
▶ Press the ok key.
The operating pressure is shown in the display.
Fault display: System pressure too low
If the system pressure in the heating system falls below the minimum
pressure that has been set, the display shows the message LoPr => L0.X
bar. The system pressure is too low.
▶ Fill the heating system.
If the system pressure in the heating system drops below 0.3 bar, the
display shows the message LoPr alternating with the operating
pressure. The heating system is then blocked.
▶ Fill the heating system.
Condens 8300i W – 6721841534 (2022/05)
Topping up the heating water
Topping up the heating water is different on every heating system. You
should therefore ask your specialist to show you how it is done.
NOTICE
Material damage due to thermal stresses!
When topping up a hot boiler with cold heating water, thermal stresses
can lead to cracking due to internal stress.
▶ Only fill the heating system when cold. Maximum flow temperature
40 °C.
Maximum pressure of 3 bar at maximum heating water temperature
must not be exceeded (pressure relief valve will open).
Bleeding radiators
If radiators heat up at different rates:
▶ Bleed radiators.
Checking and refill the heat transfer fluid of the solar thermal
system
Heat transfer fluid may only be topped up by an expert.
▶ Have the frost protection of the heat transfer fluid checked annually.
▶ Have the corrosion protection (pH value) of the heat transfer fluid
checked every 2 years.
The maximum pressure of 6 bar with solar thermal system at maximum
temperature must not be exceeded (pressure relief valve opens).
Maintenance
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