Gas Conversion; Range Rated - Beretta MYNUTE X 25 C Instrucciones De Instalacion Y Uso

b
With the OT device connected it is not possible to activate the combustion control
function. To carry out the flue gases analysis, disconnect the OT connection wires
and wait 4 minutes, or else cut off the electrical supply and reconnect power to the
boiler.
b
The combustion analysis function is normally carried out with the three-way valve
positioned on heating. It is possible to switch the valve to domestic hot water
generating a domestic hot water heat request at maximum output while the function
itself is being carried out. In this case the temperature of the domestic hot water is
limited to a maximum of 65°C. Wait for the burner to fire.
The boiler will operate at maximum heating output and it will be possible to regulate the
combustion.
ƒ Remove the screw and the cover on the air distribution box (
ƒ Insert the analysis probe adapter (
hole for the combustion analysis.
ƒ Insert the flue gases analysis probe into the adaptor.
ƒ Control the combustion, checking that the CO2 values match those in the table.
ƒ When the control is completed, remove the analyser probe and close the combustion
analysis sockets with the relative plugs and screw.
ƒ Put back and keep the analysis probe adapter supplied with the boiler in the
documentation envelope.
b
If the value displayed is different to that shown in the technical data table, DO NOT
CARRY OUT ANY ADJUSTMENTS OF THE GAS VALVE, ask assistance from the
Technical Assistance Centre.
b
The gas valve DOES NOT need adjusting and any tampering with it causes the
boiler to operate irregularly or even not at all.
b
When the combustion analysis is in progress all heat requests are inhibited and a
message is shown on the display.
When the checks are completed:
ƒ set the boiler to SUMMER or WINTER mode depending on the season
ƒ regulate the heat request temperature values according to the customer's needs.
IMPORTANT
The combustion analysis function is active for a maximum time of 15 minutes; the burner
shuts down if an outlet temperature of 95° C is reached. It will ignite again when the
temperature falls below 75° C.
b
In the case of a low temperature system we recommend carrying out the efficiency
test by taking hot water setting the boiler STATUS to SUMMER, opening the hot
water tap to full capacity and setting the temperature of the domestic hot water to
the maximum.
b
All controls must be carried out only by the Technical Assistance Centre.
).
A-B
) located in the documentation envelope, into the
D
A
B
D
4.17

Gas conversion

Conversion from a family gas to other family gas can be performed easily also when the
boiler is installed.
b
This operation must be carried out by professionally qualified personnel.
The boiler is delivered to operate with methane gas (G20).
To convert the boiler to propane gas (G31) proceed as follows:
ƒ access the technical parameters menu, as indicated in the paragraph "3.22 Access to
the parameters"
ƒ set the INSTALLER password
ƒ select the P2 menu and confirm the selection with
ƒ the display shows P2.01
ƒ select P2.01 = 0 for METHANE gas
P2.01 = 1 for LPG
The boiler needs no further adjustment.
b
The conversion must be carried out by qualified personnel.
b
After the conversion has been carried out, apply the new identification label contained
in the documentation envelope.
4.18

Range rated

This boiler can be adapted to the heating requirements of the system, in fact it is possible to
set the maximum delivery for heating operation of the boiler itself:
ƒ power up the boiler
ƒ access the technical parameters menu, as indicated in the paragraph "3.22 Access to
the parameters"
ƒ select the P3 menu and confirm the selection with
ƒ the display shows P3.10, enter the sub-menu by pressing
ƒ set the maximum desired heating value (rpm) with the
Enter
the selection with
ƒ Once the required output has been set (maximum heating), put the value on the
self-adhesive label on the back cover of this manual. For subsequent controls and
adjustments, refer to the set value.
b
The calibration does not entail the ignition of the boiler.
The boiler is delivered with the adjustments shown in the technical data table.
Depending on plant engineering requirements or regional flue gas emission limits it is,
however, possible to modify this value, referring to the graphs at page 97.
ENGLISH
and keys, confirming
19