Operating Instructions and Installation Instructions

VARINO GRANDE 350 - 600
We reserve the right to make changes to dimensions and construction 26 Edition 10.07.2015
© Copyright YGNIS AG CH-Ruswil
9.7.2. Starting sequence after power failure or after acknowledging error
In contrast to the normal starting sequence, for safety reasons after a power failure or after acknowledgement of
an error, the combustion chamber is ventilated with fresh air for 5 minutes and the oxygen sensor is
subsequently recalibrated. The previously described sequence changes as follows:
step
display
process
a
1
The mechanical ventilation is started (optional)
b
Check whether the differential pressure monitor of the room ventilation is closed
(optional)
c
The external safety gas valve is opened
d
The burner moves to 50% load position
e
5
The gas pressure monitor is inspected
f
The air pressure monitor is inspected (must be open)
g
The combustion air fan is started and run to maximum speed
h
The air pressure monitor is inspected (must be closed)
i
1
The burner ventilates the combustion chamber for 300 seconds and the oxygen
sensor is brought to its operating temperature
j
C
The oxygen sensor is calibrated to the ambient air. In the display, H is shown and then
for approx. 5 seconds C.
k
1
The burner moves to start position
l
The combustion air fan is run to the starting speed
m
2
The preliminary heating time is started (approx. 10 seconds)
n
The gas valve (multiblock) is opened
o
The burner ignites
p
Switching over from ignition by incandescence to ionisation measurement
q
3
Release of the O
2
correction
r
Release of the power modulation of the burner
9.8. Test program/chimney sweep operation
Press "+" and "-" keys at the same time and keep them pressed until the status indication changes to "tESt" on
the display. The VARINO GRANDE condensing unit is now in the test program. The display alternately shows
"tESt" and the current burner position in %. The burner can be brought to any position desired with the "+" and "-"
keys. To exit the test program, it is necessary to press the "PROG" key.
Note: The test program can be activated for a maximum of 20 minutes; after that, the unit automatically
changes back to normal operation.
Attention: The desired boiler temperature is not in operation during the test program. The boiler temperature
can rise to the value set at the temperature monitor, which causes the boiler to shut down!