49
TECHNICAL ASSISTANCE SERVICE
ENGLISH
MAINTENANCE
ON
OFF
Regular maintenance may be a legal requirement. In Italy it is required by Presidential Decree 412 of the 26th August
1993. It is also essential for the safety, efficiency and durability of the boiler. Proper maintenance keeps consumption and
emissions down, and ensures that the boiler continues to operate reliably over time.
Perform the following operations before beginning any
maintenance.
- Switch the electricity supply OFF at the system’s main
switch and at the control panel.
- Close the fuel shut-off cocks.
Once all the necessary maintenance has been completed, restore all original settings (see the values in the tables below).
b
If you are installing the boiler at an altitude of 500 metres above sea level or higher,
replace the standard nozzle
fitted to the boiler in the factory with the high altitude nozzle provided
. Also recalibrate the fuel oil pump to
the pressure shown in the table. Finally, use a fume analyser and adjust the air damper to obtain a CO
2
content of
12.5%.
Calibration table for STANDARD NOZZLE (for use below 500 metres above sea level)
Calibration table for HIGH ALTITUDE NOZZLE (FOR INSTALLATIONS AT ALTITUDES
BETWEEN 500 and 1500 metres above sea level or with intake air temperatures of below 10°C) .
Description
THC V
35 E OIL BLU
55 E OIL BLU
Air damper position
4,3
4,1
line
Standard nozzle
(for installations at altitudes below 500 metres
above sea level)
0,75
1,1
GPH
80° A
80° A
Delavan
mark
Head adjustment
Fixed
Fixed
line
Pump pressure
14,0
14,0
bar
Fuel flow rate
3 (± 4%)
4,6 (± 4%)
kg/h
Description
THC V
35 E OIL BLU
55 E OIL BLU
High altitude nozzle
(for installations at altitudes over 500 metres above
sea level or with intake air temperatures of below
10°C
0,65
1,0
GPH
80° A
80° A
Delavan
mark
Head adjustment
Fixed
Fixed
line
Pump pressure
14,0
14,0
bar
Fuel flow rate
3 (± 4%)
4,6 (± 4%)
kg/h