Lamborghini Caloreclima EM 35-E Notice D'installation Et D'entretien page 45

V Ratio
Adjustable ratio between pressure at the burner p
re differences act on the whole of the comparison membranes.
p = (p - p ) and
Br Br F
p = (p - p )
L L F
Correction of zero-point N
Correction of the difference in weight in case of different lever lengths between the air com-
parison membrane and gas comparison membrane (V 1:1). Possibility of varying original
ratio; parallel shift (offset).
Effective pressure difference p
The effective drop (or difference) relative to combustion chamber pressure is decisive for
both gas and air total flow rates.
COMPACT VALVE SEAL CONTROL DEVICE VPS 504
A seal control device to be fitted to the MULTIBLOC unit can
be supplied on request.
CALIBRATION OF AIR PRESSURE SWITCH
The air pressure switch serves as failsafe or lock-out for the
burner if comburent air pressure is cut off. It should be cali-
brated at approximately 15% lower than the air pressure level
at the burner when the latter is operating at its rated output
on 1 stage, and by ensuring that the CO figure remains
st
lower than 1%.
CALIBRATION OF MINIMUM GAS PRESSURE SWITCH
The minimum gas pressure switch serves to prevent the burner from being started up or to
shut it down. If the gas pressure falls below the minimum required level, this setting should
be 40% lower than the gas pressure obtained with the burner operating at maximum delivery.
and air pressure p
Br
, p
Br L
45
. The following pressu-
L
UK