39
Timer
RLA
JP1
Rmax
JP2
X
ADJUSTMENTS
The boilers have a fast opening gas valve. The necessary calibration for gas flow-rate may be obtained from
a double modulator coil. Calibration of the slow ignition (pre-calibrated in the factory) is electronically done
and is adjustable (for optimising and for gas type conversion) by the trimmer
RLA
on the electronic board. The
necessary thermal output for the heating system can be regulated by manipulating the trimmer
R MAX
. All the
boilers are calibrated in the factory to release 70% of their maximum heating capacity. By manipulating the
trimmer
timer
the waiting time for re-starting the boiler may be varied. All adjustments must be made on the
basis of the specific characteristics of the apparatus in use. It is necessary to check the inlet and outlet pressures
at the pressure plugs. After checking, tighten the bolts properly.
ADJUSTMENT OF OUTLET PRESSURE
Maximum pressure:
●
Turn the function selector to the TEST position. The TEST function remains active for 15 minutes max.
●
Power the modulator with the proper voltage.
●
By turning nut
B
clockwise (use a 10 mm wrench), the outlet pressure increases.
Minimum pressure screw
A
(adjust only after the calibration of the maximum outlet pressure has been completed):
●
Disconnect modulator feeding.
●
While blocking the nut
B
with a wrench, turn the screw
A
clockwise to increase the outlet pressure.
After calibration:
●
Check the maximum and the minimum pressures and adjust them if necessary.
●
Fit the plastic cap
C
.
●
Turn the function selector to the required position.
Adjustment trimmer
RLA
Adjustment trimmer
R Max
Adjustment trimmer
Timer
A
B
C
ATTENTION: In order to execute this calibration it is necessary to use a water column gauge being connected
it to the pressure taken one.
