Safety Requirements For Startup And Operation, Special Instructions For Applications With Gaseous Fuel - MTU 8 V 4000 Lx2 xx Operating Instructions Manual

1.5 Safety requirements for startup and operation, special
instructions for applications with gaseous fuel
Safety requirements for startup
Whenever the product is started, always ensure that:
• The operator has fulfilled the requirement to: Check the gas train.
Gas system, requirements
Gas supply shut-off: The incomplete machine does not have its own gas supply shutoff device. This
must be realized by the plant designer to suit site conditions.
The connection to the gas supply network is established by the plant designer in accordance with re-
quirements of the DVGW (DVGW490, G490/I). The plant designer must use certified gas trains for the
fuel supply to the product and connection to the gas supply network. The connection conditions and
dimensions must be coordinated with the manufacturer.
In flow direction, gas trains have:
• a manual shutoff valve
• a gas filter
• two gas shutoff valves
• a pressure regulating device
The gas train must be fitted with an automatic leak check.
The gas shutoff valves are activated via two different paths from the control system, whereby one gas
shutoff valve respectively is activated via one of the paths.
Gas trains must be monitored to detect minimum pressure.
The plant designer must ensure that the gas train is positioned directly in front of the engine, yet a max-
imum of 3 meters before the interface of the engine. The interface is the flange in front of the gas vol-
ume regulator of the product.
In the case of network supply pressures higher than 100 mbar, additional equipment is required on the
gas train.
The gas pressure regulator must be equipped with an approved safety shut-off valve and a safety dis-
charge valve to ensure safety in case of excessive outlet pressure at the pressure regulator. Gas dis-
charge must be routed to a safe area (to atmosphere).
If the gas supply is connected to a vessel or if gases containing oxygen are used, the gas train must be
equipped with a temperature-monitored flame arrester.
10 | Safety | MS150114/01E 2015-03