Supplied By www.heating spares.co Tel. 0161 620 6677
22
Tempra 12 / 18
IN
OUT
C
F
E B
A
D
Key
A
Pressure test point upstream
B
Pressure test point downstream
C
Protection screw
D
Minimum pressure adjustment screws
E
Maximum pressure adjustment screws
F
Pressure compensation pipe
3. SERVICE AND MAINTENANCE
3.1 Settings
All the adjustment and conversion operations must be performed by Qualified Personnel, such as
personnel from the Local Customer Service Centre.
FERROLI Ltd. declines all liability for damage to persons and/or things deriving from tampering with
the appliance by non-authorised persons
Conversion of supply gas
The appliance can operate on Natural Gas or LPG as the supply gas, and is factory configured for
use with one of the two gases, as is clearly marked on the packaging and on the rating plate on the
appliance itself. If the appliance has to be used with a gas other than the one it has been set for, the
special conversion kit must be used, as shown below:
1
Replace the nozzles in the main burner, installing the nozzles indicated in technical data table in
Chap. 4.4, according to the type of gas used
2
Adjust the minimum and maximum pressures in the burner (ref. corresponding paragraph), setting
the values indicated in technical data table for the type of gas used.
3
Change the position of Jumper 02 on the electronic board (ref. corresponding paragraph).
4
Apply the adhesive label in the conversion kit next to the rating plate, to confirm the
conversion operation.
Adjusting the burner pressure
This appliance, featuring flame modulation, has two set pressure values: the minimum and maximum,
which must be the values indicated in technical data table, according to the type of gas.
• Connect a suitable pressure gauge to the pressure test point
“B”
, located downstream of
the gas valve.
• Disconnect the pressure compensation pipe
“F”
.
• Remove the protection cap
“C”
.
• Turn the potentiometer
P3
(located on the control
board) to the minimum position (clockwise).
• Operate the boiler in central heating mode.
• Adjust the minimum pressure using the screw
“D”
,
clockwise to decrease it and anticlockwise to increase.
• Turn the potentiometer
P3
to the maximum position
(anticlockwise).
• Adjust the maximum pressure using the screw “E”,
clockwise to increase it and anticlockwise to decrease
it.
• Reconnect the pressure compensation pipe
“F”
.
• Replace the protection screw
“C”
.
fi g. 15
