42 Installation and maintenance instructions 0020308118_05
2. After converting the gas type, the two supplied stickers
for the new gas type must be affixed onto the large
data plate (electronics box) and onto the small data
plate (on the top of the product).
9.5.5 Setting the air/flue pipe type
▶ Set the correct air/flue pipe type with which the product
was installed, and confirm.
9.5.6 Contact details
▶ If required, store your telephone number and your com-
pany name in the Appliance config. (max. 16 digits/no
blank spaces). The end user can view the telephone
number.
9.5.7 Restarting the installation assistant
1. Navigate to MENU → SETTINGS → Installer level →
Installation assistant.
2. Confirm by pressing .
9.6 Check programmes and actuator tests
MENU → SETTINGS → Installer level → Test modes
In addition to the installation assistant, you can also call
up the following functions for start-up, maintenance and
troubleshooting:
Check programmes (→ Appendix G)
Actuator test (→ Appendix H)
9.7 Guaranteeing the system pressure
If the heating installation covers multiple storeys, higher val-
ues than the permissible operating filling pressure may be
necessary for the filling pressure in order to prevent air from
getting into the heating installation.
This static height is the height difference in metres between
the heat generator and the highest heating area for a cellar
installation or the lowest heating area for a rooftop control
system.
– Permissible operating filling pressure: 0.1 to 0.2 MPa (1.0
to 2.0 bar)
The operating filling pressure must be increased by
0.01 MPa (0.1 bar) for every metre of the determined static
height. The filling must take place via the intake side of the
heating pump, usually the return.
Once the maximum filling pressure is reached, the product
signals the excess pressure using a flashing value on the
display.
–
Maximum operating filling pressure: ≤ 0.25 MPa
(≤ 2.50 bar)
Once the filling pressure reaches the minimum filling pres-
sure, the product signals that the pressure is low using a
flashing value on the display.
– Minimum operating filling pressure: < 0.08 MPa
(< 0.80 bar)
Once the filling pressure reaches the operating limit filling
pressure, the product shuts down and the display shows
fault code F.022.
– Operating limit filling pressure: ≤ 0.03 MPa (≤ 0.30 bar)
▶ When you fill or top up the heating water, start the purge
programme (→ Section 9.10).
9.8 Flushing the heating installation for the first
time ("cold")
Note
The complete heating system must be flushed
at least twice: Once with cold water and once
with hot water in accordance with the following
instructions.
1. Check whether all thermostatic radiator valves and
both service valves on the product are open.
2. Connect a hose to the drain valve that is located at the
lowest position in the heating system.
3. Open the radiator valves and the drain valves so that
the water can drain quickly. Start at the next point in
the installation and open the purging valves on the ra-
diators so that the contaminated water can completely
drain.
4. Close the draining cocks.
5. Refill the heating system with water.
6. Check that the expansion relief valve of the heating
system is functioning correctly by turning the handle on
the valve.
7. Check the pressure in the heating system and top up
with water if necessary.
8. Close the filling valve and the cold water tap.
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