Mounting gas ramps
dreizler A 3001 E - 18.12.2015 | A 2021 - 1.15 | EN - 18.05.2015
107
32.2 Mounting the gas ramp
The specific conditions of the boiler room must be taken into consideration when mounting the gas
ramp on the boiler.
Use an additional flange tube section or a distance part if the boiler is wide.
Glued thread connections can be opened, when heated by way of a hot air blower to
< 60°C.
Install a compensator (optional scope of delivery) for tension-free and therefore secure pipe installation,
and to eliminate the transmission of vibrations.
NOTICE:
Pipes must be EN 2440 certified, and threads must be EN 10226 certified.
Flange dimensions must comply with DN 1092-1 pressure grade PN 16.
32.3 Distance of solenoid valve to burner
A max. distance of 500mm from the connection at the burner housing to the first fitting with double gas
valves should not be surpassed.
This will ensure timely gas entry into the burner head and therefore safe ignition of the gas burner flame
within the safety time. An increase initial gas flow with improve safety time.
32.4 Leakage test of the gas ramp
The gas ramps have been tested for leakage ex works:
•
With 1.5 times the max. supply pressure p
e
up to and including the gas/dual fuel mountings,
E.g.: At p
e
= 300mbar a pressure of 450mbar is factory-tested.
•
With 100mbar on outlet-side up to the gas connection flange of the burner housing.
Once installation on-site has been completed, a leakage test of the gas ramp on all connection points must
be conducted.
Open the ball valve to supply gas pressure from the supply line to the gas/dual fuel mountings.
Conduct a visual leakage test with foaming agents.
There should be no bubbles visible.
NOTICE:
Alternatively, use an electronic gas testing apparatus with gas detector to check the flange/thread connec-
tion points.
Commission the burner in accordance with the commissioning instructions with closed gas supply line.
During commissioning, conduct similar tests for the supply line between gas/dual fuel mountings and
burner input flange inside the burner housing.
32.4.1 Venting of the gas pipe
The gas pipeline may be safely vented with hose, but only out doors. A test burner allows the vent directly
to the gas train.
