Beretta MYNUTE GREEN 28 C.S.I. Manual De Instalacion Y Uso página 18

14
.
The boiler has already been factory-adjusted by the manufacturer.
If a new adjustment is required, for example, after extraordinary
maintenance, replacing the gas valve or converting from natural
gas to LPG, proceed as follows.
Maximum and minimum power, maximum heating and slow
start must be adjusted in the indicated sequence by qualified
staff.
- Power the boiler
- Turn the function selector to OFF/RESET (digit "--")
- Pull off the 3 function buttons (domestic hot water A, command
B and heating C, fig. 35)
display
Estate
KT
35
A
- Turn the trimmers in the following sequence and adjust them
until their values correspond with those indicated in the table:
1. Max (maximum fan rpm)
2. Min (minimum fan rpm)
3. Max heating (maximum heating fan rpm)
4. Slow start LA (set to 3.7=3700 rpm)
Calibration does not switch on the boiler.
When the trimmers are turned the value expressed in
thousands (e.g.. 2.5=2500 rpm) is indicated on the 2-digit
display).
Slow start LA must be adjusted after calibrating all the other
trimmers.
MAXIMUM
NATURAL GAS
FAN RPM
28 C.S.I.
32 C.S.I.
36 C.S.I.
15 R.S.I.
25 R.S.I.
35 R.S.I.
NATURAL GAS
MINIMUM
FAN RPM
28 C.S.I.
32 C.S.I.
36 C.S.I.
15 R.S.I.
25 R.S.I.
35 R.S.I.
MAXIMUM HEATING
NATURAL GAS
FAN RPM
28 C.S.I.
32 C.S.I.
36 C.S.I.
15 R.S.I.
25 R.S.I.
35 R.S.I.
GAS VALVE CALIBRATION
- Power the boiler
- Open the gas tap
- Turn the function selector to OFF/RESET (digit "--")
ADJUSTMENTS
Off/Reset
Inverno
LA
CO
Inverno con
preriscaldo
B C
LPG
(G20) propane (G31)
61 61
59 59
63 63
42 41
55 54
60 60
LPG
(G20) propane (G31)
17 17
15 15
14 14
13 13
17 17
14 14
LPG
(G20) propane (G31)
44 43
45 45
52 52
42 41
55 54
60 60
- Pull off the domestic hot water temperature selector knob (A)
and the domestic hot water function selector knob (B)
36
- Press the combustion analysis button CO
- Wait for the burner to ignite. "CO" is displayed on the digital
display and the boiler works at maximum heating power. The
flue cleaner function remains active for a maximum of 15 min; if
a delivery temperature of 95°C is reached, the burner switches
off. It is re-ignited when this temperature falls below 75°C.
- Remove the plug and insert the fumes analysis probe
- Turn the max. heating trimmer clockwise until it reaches the
maximum fan rpm (see table)
DESCRIPTION
28 C.S.I. CO
2
32 C.S.I. CO
2
36 C.S.I. CO
2
15 R.S.I. CO
2
25 R.S.I. CO
2
35 R.S.I. CO
2
- Check the CO
in the table, turn the maximum gas valve adjustment screw
- Turn the max. heating trimmer anti-clockwise until it reaches the
minimum fan rpm (see table)
DESCRIPTION
28 C.S.I. CO
2
32 C.S.I. CO
2
36 C.S.I. CO
rpm
2
15 R.S.I. CO
rpm
2
25 R.S.I. CO
rpm
2
35 R.S.I. CO
rpm
2
rpm
- Check the CO
rpm
in the table, turn the minimum gas valve adjustment screw
rpm
Maximum power
rpm
adjustment screw
rpm
rpm
rpm
Minimum power
rpm
adjustment screw
37
rpm
rpm
- Turn the max. heating trimmer to the maximum heating fan rpm
rpm
(see table)
rpm
- To exit the flue cleaner function, turn the control knob B
rpm
- Remove the fumes analysis probe and put back the plug.
rpm
Remount the knobs on the panel. The "combustion analysis"
function automatically deactivates if the board generates an alarm.
If a fault develops during the combustion analysis phase, per-
form the release procedure as follows:
turn the function selector B to
the required function.
18
A B
NATURAL GAS
(G20) propane (G31)
max 9,0
max 9,0
max 9,0
max 9,0
max 9,0
max 9,0
value: if the value does not match that indicated
2
NATURAL GAS
(G20) propane (G31)
min 9,0
min 9,0
min 9,0
min 9,0
min 9,0
min 9,0
value: if the value does not match that indicated
2
, then to
LPG
10,0 %
10,0 %
10,0 %
10,0 %
10,0 %
10,0 %
LPG
10,0 %
10,0 %
10,0 %
10,0 %
10,0 %
10,0 %
, and then move it to