5
If necessary, use the control knob
(a) to manually select which cyl-
inder will be operating and which
will be held in reserve.
Always turn control knob (a) as far
to the left or right as it will go (an
intermediate position will cause
gas to be removed from both
gas cylinders simultaneously).
Removal status
In the normal position (operating
cylinder on the left, reserve cyl-
inder on the right), the following
display will be seen:
– Status display (b) is green =
gas taken from the left cylin-
der (operating cylinder).
– Status display (b) is red = gas
taken from the right cylinder
(reserve cylinder).
Changing cylinders
Residual gas: No smok-
ing, no naked flames!
DuoComfort offers the possibility
of changing empty gas cylinders
without interrupting operation
of the consumers. Non-return
valves integrated into the inlet
connections prevent gas from
escaping when only one gas
cylinder is attached for a short
time (see “Using only one gas
cylinder”).
– Rotate the control knob (a) by
180° or half a turn to the stop
position, and the previous
reserve cylinder becomes the
operating cylinder. After the
cylinder change the full gas
cylinder is available again as
the reserve cylinder.
The status display (b) changes
to green.
– Close the empty cylinder's
valve and screw off the high
pressure hose.
– Screw the high-pressure hose
onto the full gas cylinder and
open the cylinder valve. If
necessary firmly press the
hose rupture protection (d) for
about 5 seconds.
The status display (b) remains
on green.
After any intervention,
check the hose connection
on the cylinder valve for leaks
(see “Checking for leaks in the
high-pressure section”).
