Operation Manual

Gas system
8
84 Caravan - 14-09 - EN
8.7 DuoControl CS switching facility
The DuoControl is an automatic switching facility with a remote display for a two-
bottle gas system. The DuoControl 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 DuoControl switching facility is suitable for all commercial gas
bottles from 3 kg to 33 kg.
Construction of the unit The DuoControl switching facility consists of a switching valve (Fig. 80,3) and the
operating unit (Fig. 81). The switching valve is mounted between the gas tubes
(Fig. 80,2 and 5). The knob (Fig. 80,4) on the switching valve 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.
The switching valve is equipped with the regulator defroster "EisEx". This prevents
damage to the gas system during the winter months.
Only the electrical functions can be switched at the operating unit (Fig. 81). The
regulator taps on the gas bottles (Fig. 80,1 and 6) must be opened manually.
The switching valve provides a constant gas pressure, regardless of which gas
bottle is being drawn upon. The two indicator lamps on the operating unit show
the filling level of the primary bottle. The primary bottle is full when the green indi-
cator lamp (Fig. 81,6) lights up. The primary bottle is empty when the red indicator
lamp (Fig. 81,5) lights up. The gas is then supplied via the reserve bottle.
X Do not use the switching facility in closed spaces.
X During the journey the gas system may only be operated with a crash sensor
and suitable high-pressure hoses with hose break guard. Danger of explo-
sion!
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 Additionally observe the manufacturer's instruction manual.
Fig. 80 DuoControl switching facility Fig. 81 Operating unit