Beretta Ciao C.A.I User Manual

14
caldaie
2.4.2.1 Maximun calibrations
- Open a DHW cock at maximum capacity (let it open for at
least two minutes before calibrating).
If possible, check maximum current available is delivered
to modulator by a millamperometre connected in series to a
modulator cable (MTN 120 mA and GPL 165 mA);
- use a fork wrench CH10 - or proper instrument - to act on
the valve and adjust maximum speed (see GAS PRESSURE
TABLE - APPENDIX D page 80);
- close the cock.
Fig. 2.17
Fig. 2.14
boiler.
- Make sure the burner goes off by lowering the temperature
of the heating potentiometer.
- Turn the heating potentiometer to maximum.
- Gas pressure will be reduced to minimum after the phase of
slow ignition so that it will be possible to use the P4
potentiometer (Fig. 2.16) and set the minimum heating until
reading the degrees on the gauge (GAS PRESSURE TABLE
- APPENDIX D page 80).
- Turn the function selector and the main system switch to
OFF before removing the SM1 jumper.
2.4.2.3 Minimum heating gauging (C.S.I. only)
- Turn the main system switch to OFF.
- Open the boiler instrument panel and remove the plastic
covers that give access to the jumpers and trimmers (Fig.
2.16).
- Insert a jumper in position CM1 to set the timer to zero as
indicated in the figure Fig. 2.16.
- On the control panel:
• select « » WINTER;
• turn the heating potentiometer to maximum
- Use the eventual room thermostat or timer to start up the
2.4.2.2 Idling calibration
- Open a DHW cock at maximum capacity (let it open for at
least two minutes before calibrating);
- disconnect a modulator faston;
- use a cross screwdriver - or proper instrument - to act on the
idling red screw and adjust minimum speed carefully checking
data comply with GAS PRESSURE TABLE - APPENDIX
D page 80);
- connect faston to modulator again and close DHW cock.
Fig. 2.15
2.4.3 Slow ignition
Slow ignition cannot be adjusted by a technician, as its value is
preset by microprocessor.
In case of transformation from methane to LPG, insert
jumper CM2 (Fig. 2.12 page 13) to increase modulator
pressure, then increasing gas inflow to the burner. In
case of transformation from LPG to methane act in
reverse order.
2.4.4 Ionization current measuring
Measure ionization current by connecting a serial d.c. micro-
amperometer to ignition/detection electrode with a parallel 0.22
µF 400 V condenser between prods, as in figure Fig. 2.17.
!!
Fig. 2.16
Flame
control board
Micro-
amperometer

Beretta Ciao C.A.I Specifications

General

Brand	Beretta
Model	Ciao C.A.I
Category	Boiler
Language	English