Commissioning
27
Condens 7000 F – 6720871560 (2019/11)
7.7
Supply air and flue gas connection
7.7.1
Check supply and extract ventilation and flue gas
connection
▶ Check whether the supply and extract ventilation comply with locally
applicable regulations. Have any faults rectified immediately.
DANGER:
Danger to life due to poisoning!
Insufficient ventilation can lead to dangerous flue gas leaks.
▶ Never block supply and extract air apertures or reduce their size.
▶ The boiler must not be operated, unless you immediately remedy
the fault.
▶ Inform the system user in writing of the problem and associated
danger.
▶ Check whether the flue gas connection complies with the applicable
regulations (
▶ Have any faults rectified immediately.
7.7.2
Checking the flue gas damper (scope of delivery of positive
pressure cascade)
When using motorised flue gas dampers the closing function must be
checked. The damper is closed in the electrically de-energised state.
Check function of flue gas damper:
▶ Open flue gas damper manually via the setting pin (from position 1 to
position 2).
The function exists if the damper closes automatically (pin in position
1).
Fig. 29 Setting pin on the butterfly valve
[1]
Position 1: damper closed
[2]
Position 2: damper open
7.8
Making the heating system operational
▶ Open the fuel supply at the main shut-off valve and upstream of the
air/gas ratio control valve.
▶ Switch on the heating system emergency stop switch (if installed)
and/or the corresponding domestic fuse/circuit breaker.
7.9
Commissioning the control unit and burner
7.9.1
Switching on the boiler at the control unit
▶ To commission the control unit, observe the technical
documentation for the specific control unit.
To avoid frequent cycling of the burner and to ensure efficient operation,
the heating curve should generally be set as low as possible.
7.9.2
Carrying out a flue gas test
▶ To set up and perform the flue gas test, observe the corresponding
technical documentation for the control unit.
7.10
Measuring the gas supply pressure and static
pressure
▶ Release the locking screw of the gas supply pressure and ventilation
test nipple (
Fig. 28, [1], page 26) by turning it through 2
revolutions.
▶ Push the test hose of the pressure gauge (measurement precision
less than 0.1 mbar) onto the pressure test nipple.
▶ With the burner operational (full load), check the gas supply pressure
and record the value in the commissioning report (
Chapter 17.6,
page 63).
When operating with
LPG
, adjust the additional pressure regulator
with the sizes 75 and 100 kW
in full-load operation to an outlet
pressure of 30 mbar. Then measure and make a note of the supply
pressures upstream and downstream of the pressure regulator.
If the gas supply pressure falls outside the values in tab. 10 :
▶ Shut down the floor standing boiler and notify the gas supplier.
Commissioning is not permitted.
To check the gas pressure regulator or the gas static pressure in the gas
installation:
▶ Shut down the burner from full load.
▶ Wait 10-20 seconds and then measure the resulting gas supply
pressure/static pressure at the test nipple for the gas supply
pressure/static pressure.
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