24
OPTIMAX HE PLUS 25 S
Cod. 3540R540 - 02/2009 (Rev. 00)
fig. 23
3. SERVICE AND MAINTENANCE
3.1 Adjustments
All adjustment and conversion operations must be carried out by Qualified Personnel such as ferroli
Technical Service.
FERROLI declines any responsibility for damage or physical injury caused by unqualified and unauthorized
persons tampering with the device.
Gas supply conversion
The unit can function with either Natural Gas or LPG (commercial propane)and is factory-set for use with
one of the two gases, as clearly shown on the packing and on the unit’s dataplate. Whenever a different
gas to that for which the unit is preset has to be used, a conversion kit will be required, proceeding as
follows:
1
Remove the casing.
2
Open the sealed chamber.
3
Release the fixing clip
C
and remove the gas pipeA from the fan - venturi assembly.
4
Replace the nozzle
B
inserted in the gas pipe with that contained in the conversion kit.
5
Reassemble the gas pipe
A
with the clip and check the seal of the connection.
6
Apply the plate contained in the conversion kit, near the dataplate.
7
Refit the sealed chamber and casing.
8
Adjust the parameter for the specific type of gas to be used:
- Turn the boiler onto standby
- Press the DHW buttons
(part. 1, 2 - fig. 1) for 10 seconds: the display will show “P01”
blinking
- Press the DHW buttons
(part. 1, 2 - fig. 1) to set parameter 00 (for natural gas operation)
or 01 (for LPG operation)
- Press the DHW buttons
(part. 1, 2 - fig. 1) for 10 seconds
- The boiler will go back onto standby
9
Check working pressure.
10
Check CO
2
mixture as detailed (page 27 combustion analyser testing).
