9 Start-up
30 Installation and maintenance instructions Energy
7
0020300876_01
9.5 Checking the gas type
Make sure that the product is set up correctly by checking
the gas type. This ensures optimum combustion quality.
▶ Check the gas type as part of routine product mainten-
ance work when replacing components or carrying out
work on the gas route.
9.6 Checking the factory setting
The product's combustion has been factory tested and is
preset for operation with the gas group indicated on the data
plate.
The product is only authorised to be operated with natural
gas.
▶ Check the information about the gas type indicated on
the data plate and compare this with the gas type avail-
able at the installation site.
Condition: The product design is not compatible with the local gas group
▶ Do not start up the product.
Condition: The product design is compatible with the local gas group
▶ Proceed as described below.
9.7 Avoiding danger arising from insufficient
water pressure
The filling pressure must be between 0.10 and 0.15 MPa
(1.0 and 1.5 bar).
Note
If the heating flow temperature is shown in the
display, press and hold the and buttons at
the same time for longer than five seconds, or
temporarily deactivate heating mode in order to
display the pressure.
If the heating installation extends over several storeys,
higher filling pressures may be required to avoid air entering
the heating installation.
If the water pressure falls below 0.05 MPa (0.5 bar), the
value flashes in the display.
If the water pressure falls below 0.03 MPa (0.3 bar), the
product switches off. The display shows 0.0 MPa (0.0 bar).
Fault F22 will be stored in the fault list.
▶ Top up the water in the heating installation to start up the
product again.
◁ The pressure value flashes in the display until a
pressure of 0.05 MPa (0.5 bar) or higher has been
reached.
9.8 Switching on the product
▶ Switch on the product via the main switch installed on-
site.
9.9 Filling and purging the heating installation
Preliminary work
▶ Flush the heating installation through.
1. Check the silicone hose connection (1) between the
pump's automatic air vent and the hydraulic console.
2. Fill with water until the required filling pressure is
reached.
– Recommended filling pressure: 1 to 1.5 bar
◁ The heating and hot water functions cannot be activ-
ated.
◁ The pressure value flashes in the display until a
pressure of 0.05 MPa (0.5 bar) or higher has been
reached.
◁ An automatic air vent function is activated if the
pressure exceeds 0.05 MPa (0.5 bar) for longer than
15 seconds.
3. Purge each radiator until the water escapes normally,
and then retighten the system's purging valves.
4. Check whether all connections are leak-tight.
Condition: If the noise persists in the boiler
▶ Purge the product again by activating check programme
(P.07) and then (P.06).
Check programmes – Overview
9.10 Filling the domestic hot water circuit
1. Open the water tap to fill the domestic hot water circuit.
2. Close the water tap once the appropriate volume of
water has flowed out.
◁ The domestic hot water circuit is filled.
3. Check all connections and the entire system for leak-
tightness.
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