Burstner Trecento 2011 - DuoControl Switching Facility

73Belcanto/Trecento - 10/11 - Ausgabe 07/10 - 1976844 - BUE-0042-06EN
Gas system
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 Connect the external gas device to the connection point (Fig. 86,1).
 Open the gas isolator tap (Fig. 86,2).
7.6 DuoControl switching facility (special equipment)
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 continue 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 reversing valve (Fig. 87,3) and
an operating unit (Fig. 88). The reversing valve is installed between the gas
tubes (Fig. 87,2 and 5). The knob (Fig. 87,4) on the reversing 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 reversing valve is equipped with the regulator defroster Eis-Ex. This pre-
vents damage to the gas system during the winter months.
Only the electrical functions can be switched at the operating unit (Fig. 88).
The regulator taps on the gas bottles (Fig. 87,1 and 6) must be opened man-
ually.
The reversing valve provides a constant gas pressure, regardless of which gas
bottle is being drawn upon. The two indicator lamps on the operating unit indi-
cate the level of the primary bottle. When the green indicator lamp (Fig. 88,6)
illuminates, the primary bottle is full. When the red indicator lamp (Fig. 88,5)
illuminates, the primary bottle is empty. In this case, the reserve bottle is used
for the gas supply.
Operating modes The DuoControl switching facility has two operating modes:
 Winter operation "On and heating"
 Summer operation "On"
 Do not use the switching facility in closed spaces.
 Also read the manufacturer's instruction manual.
Fig. 87 DuoControl switching facility Fig. 88 Operating unit