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FERSYSTEM TECH 31 C
Cod. 3540U320 - 09/2009 (Rev. 00)
fig. 28
3. SERVICE AND MAINTENANCE
3.1 Adjustments
All adjustment and conversion operations must be carried out by Qualified Personnel such as fer Tech-
nical Service.
FER declines any responsibility for damage or physical injury caused by unqualified and unauthorized
persons tampering with the device.
Gas supply conversion
The unit can operate on natural gas or LPG and is factory-set for use with one of these two gases, as
clearly shown onthe packing and on the dataplate. If a gas different from that for which the unit is
arranged has to be used, a conversionkit will be required, proceeding as follows:
1
Remove the casing.
2
Open the airtight chamber.
3
Release the fixing clip
C
and remove gas pipe
A
from the fan - venturi assembly.
4
Replace
nozzle
B
, inserted in the gas pipe, with that contained in the conversion kit.
5
Reassemble gas pipe A with the clip and check the seal of the connection.
6
Apply the label, contained in the conversion kit, near the dataplate.
7
Refit the sealed chamber and casing.
8
Modify the parameter for the type of gas:
• put the boiler in standby mode
• press the DHW buttons details 1 and 2 - fig.1 for 10 seconds: the display shows “P01“ flashing.
• press the DHW buttons fig.1 details 1 and 2 -
to set parameter
00 (for use with natural gas) or
01 (for use withLPG ).
• press the DHW buttons details 1 and 2 - fig.1 for 10 seconds.
• the boiler will return to standby mode
9
Using a combustion analyser connected to the boiler fume outlet, check that the CO 2 content in
the fumes, withthe boiler operating at max. and min. power, matches that given in the technical
data table for the correspondingtype of gas.
Summary of Contents for FERSYSTEM TECH 31 C
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