Operation Manual

Gas system
8
81Caravan - 12-11 - EN
The external gas connection (Fig. 86) is located at the rear or to the left or right of
the vehicle depending on the model.
 Connect the external gas device to the connection point (Fig. 86,2).
 Open the gas isolator tap (Fig. 86,1).
8.7 Duomatic switching facility
The Duomatic is an automatic switching facility with a remote display for a two-
bottle gas system. The Duomatic switching facility automatically switches gas
supply from the primary bottle to the reserve bottle as soon as the primary bottle
is either empty or no longer ready for operation. The gas appliances may still con-
tinue operation. The Duomatic switching facility is suitable for all commercial gas
bottles from 3 kg to 33 kg.
Construction of the unit The Duomatic switching facility consists of a central regulator (Fig. 87,3) and a
switching regulator (Fig. 87,5). The knob (Fig. 87,6) on the switching regulator is
used to select which of the gas bottles is to be used as a primary bottle and which
is to be used as a reserve bottle.
Both regulators are equipped with a pressure controller and the regulator defroster
Eis-Ex. This prevents damage to the gas system during the winter months.
Fig. 86 External gas connection, gas iso-
lator tap closed
1
2
X Do not use the switching facility in closed spaces.
Z If the vehicle is equipped with a panel of the DT series and the switching facility
is operated via this panel, the operating unit is not required.
Z Further information can be obtained in the device manufacturer's instruction
manual.
Fig. 87 Duomatic switching facility Fig. 88 Operating unit