19
ADJUSTMENTS
Note: For this calibration it is necessary to use a water column pressure gauge connected to the pressure
plug.
RADJUSTMENT OF OUTLET PRESSURE
Maximum pressure:
●
Power the modulator with the proper voltage.
●
By turning nut
B
clockwise (use a 10 mm wrench), the outlet pressure increases.
Minimum pressure (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
.
The boilers have a fast opening gas valve. The necessary calibration for gas delivery 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 removing the
jumper
JP4
, the waiting time for re-starting the boiler may be varied by 2.5 min. All the regulations follow the
specific characteristics of the system where the boiler will be applied. It is necessary to check the inlet and outlet
pressures at the pressure plugs. After checking, tighten the bolts properly.
J P 4
J P 1
J P 3
J P 5
R L A
R m a x .
A
B
C
Trimmer di regolazione
RLA
Trimmer di regolazione
R. MAX
Adjustment trimmer
RLA
Adjustment trimmer
R. MAX
