Beretta Ciao C.A.I User Manual

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2.4 PRESSURE CALIBRATION ON THE
BURNER
2.4.1 Preliminary operations
The following are necessary for calibration and checks: a
pressure gauge (differential manometre), a medium flat
screwdriver, as well as 10-mm socket wrenches.
Act as follows:
- connect pressure gauge to pressure outlet (1 - Fig. 2.13)
upstream of gas valve;
- check static pressure, with boiler off, does not exceed the
limit value of 50 mbar;
- enable « » DHW operation by dashboard controls;
- select maximum DHW temperature value;
- fully open DHW cock and check, by pressure gauge
connected, that gas dynamic pressure is not below the
following values:
- 15 mbar for methane
- 37 mbar for LPG
- disconnect pressure gauge and close outlet (1 - Fig. 2.13).
2.4.2 Pressure calibration on the burner
See the following operations:
- disconnect compensating outlet (4 - Fig. 2.13) of gas val-
ve (C.S.I. only);
- connect a pressure gauge end to pressure outlet (2 - Fig.
2.13) downstream of gas valve and the other end to
compensating outlet on air chamber (C.S.I. only);
- select maximum DHW and CH temperature values by
controls;
- remove protection cap from idling adjusting screw (3 -
Fig. 2.13).
2.3 GAS TRANSFORMATION
PROCEDURES
Shifting from a gas to another, belonging to another group, is
easy also when the boiler is already installed. For the relevant
pressure values, refer to “GAS PRESSURE TABLE”
APPENDIX - D page 80.
Replace burner nozzles as follows (see table 4.4.14 pages 37
and 38):
- stop boiler voltage and close gas central cock;
- remove the cover;
- remove combustion chamber front cover;
- remove burner unit by untightening screws (A) fixing it to
gas manifold (Fig. 2.11).
Now, replace nozzle with manifold installed on the boiler;
install nozzles using new gaskets available in the
transformation kit.
Carefully check nozzle cleaning: also a partial
obstruction would seriously affect combustion.
Fig. 2.11
Fig. 2.13
Fig. 2.12
!!
TRASFORMATION FROM LPG TO MTN
- Remove jumper installed in control board, in position CM2
(Fig. 2.12).
TRASFORMATION FROM MTN TO LPG
- Place jumper available in the kit in position CM2 in control
board, as shown in figure 2.12.
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Beretta Ciao C.A.I Specifications

General

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