Bedienungsanleitung DRU Maestro 75 Tunnel (Seite 48 von 56) (Englisch)

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10. Final inspection

For a good and safe operation of the appliance, the following checks must be performed prior to commissioning.

10.1 Gas tightness

3All connections must be gas tight. Check the connections for gas tightness. The gas control can be subjected to a

maximum pressure of 50 mbar.

10.2 Gas pressure/line-pressure

The burner pressure is set at the factory; see data plate.

3The line-pressure in house installations must be checked, because it can be wrong.

1Check the line-pressure. See fig. 6-1 (P1) for the measuring nipple on the gas control.

- Contact the gas company if the line-pressure is too high.

- If the line-pressure is too low, check this at the gas meter. Contact the gas company if the line-pressure is also too low

at the gas meter.

10.3 Ignition main burner

For igniting the main burner, see the User Manual.

10.3.1 First ignition of the appliance after installation or adjustments

3After installation, or after work has been performed, you should ignite the appliance for the first time without the glass

pane. If necessary, bleed the gas pipe.

Proceed as follows:

1. Remove the glass pane from the appliance (see chapter 8).

2. Start the ignition procedure as described in the User Manual.

The appliance ignites on the main burner with 50% of the full output. Once the flame has passed over the main burner to

the ionization and a flame has been detected, the appliance will modulate to 100%. This detection will have to take place

within 15 seconds, or else the appliance will enter error mode. If the appliance has a second, separately switchable burner

and the main burner continues to burn, the second valve will switch in order to ignite the second burner. Here, you can

hear a clear ‘click’ sound. (Go to step 11 if the burner continues to burn).

If the main burner does not ignite:

3. Reset the system by pressing the buttons ‘arrow up’ and ‘arrow down’ simultaneously.

4. Repeat the ignition procedure until the main burner ignites.

3The system can be reset and re-ignited two times in a row at maximum. Then the system will enter a hard lock-out and

you will have to wait half an hour, before you can make a new attempt. Never use more than 3 attempts to ignite the

appliance, as this could lead to a accumulation of gas within the appliance. Make sure that there is no

more gas in the appliance before making 3 new ignition attempts.

1If you do not succeed after a few attempts, consult the diagram with error messages (see appendix 1: Malfunctions).

5. Check the flame transfer on the main burner and check whether the main burner continues to burn (go to step 11 if the

burner continues to burn).

If the main burner does NOT continue to burn:

6). Mount the glass pane.

7). Reset the system by pressing the buttons ‘arrow up’ and ‘arrow down’ simultaneously.

8). Now ignite the main burner and check whether it continues to burn (go to step 12 if the burner continues to burn).

3Limit the ignition attempts with mounted glass pane to a MAXIMUM of 1 ignition attempt.

If the main burner again does NOT continue to burn:

9). Switch off the appliance.

10). Consult the diagram with error messages (see appendix 1: Malfunctions) (Go to step 1 once the malfunction has been

remedied).

Installation manual

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