Service And Maintenance - Ferroli Prextherm N serie Installations, Bedienungs Und Wartungsanleitungen

PREXTHERM N
2.6 Opening and adjusting the door
Opening
The burner door can be opened to the right or to the left by simply loosening the 2 nuts
to the right or left of part 1.
Seal and horizontal adjustment
Screw down the lock nuts 2; screw down the nuts 1 as much as necessary; then lock
the lock nuts 2.
Positioning and vertical adjustment
After fitting the burner, it may be necessary to reposition the door. This is possible by
loosening the grub screw 3 and turning the nut 4. It will be necessary for the entire
sealing bead 5 to be under pressure on the stop.

3. SERVICE AND MAINTENANCE

All the adjustment, commissioning and maintenance operations must be performed by Qualified
Personnel, in compliance with the standards in force.
FERROLI S.p.A. declines all liability for damage to persons and/or things deriving from the tampering with the appliance by unqualified or
unauthorised persons.
Before performing any cleaning or maintenance operations, disconnect the appliance from the mains power supply using the system switch
and/or the special on-off devices.
3.1 Commissioning
Checks to be performed on first ignition, and after all maintenance operations that involve the disconnection of the appliance from the systems
or intervention on the safety devices or parts of the boiler:
Before first ignition
Before igniting the boiler for the first time, check that:
a the system is filled at the right pressure and any air has been correctly vented;
b there are no water or fuel leaks;
c the electrical power supply is correct;
d all the flues have been installed correctly and not too near to or across any flammable parts;
e there are no flammable substances near the appliance;
f the burner is suitably sized for the output of boiler;
g the water on-off valves are open.
First ignition
After having carried out the preliminary checks, the following ignition operations can be performed:
1 Open the fuel on-off valve.
2 Set the thermostat 4 (Fig. 1) to the desired value.
3 Close the switch upstream from the boiler and switch 5 (Fig. 1) on the control panel.
At this stage, the burner will be ignited and the boiler will start operation.
After first ignition
After first ignition, check that:
1 The burner anchor ring and smokebox are sealed. If flue gas leaks from the door, adjust the corresponding screws so as to further
compress the gasket against the ledge, at the point where the leaks occur.
2 The burner is working correctly. This check should be performed using the required instruments, following the manufacturer's instructions.
3 The thermostats are working correctly.
4 Water is circulating in the system.
5 The flue gas is completely expelled through the flue.
3.2 Adjustments
Adjusting the burner
The efficiency and correct operation of the boiler depend above all on accuracy of the adjustments made to the burner.
Carefully follow the instructions provided by the manufacturer. Two-stage burners must have the first stage adjusted to an output that is no
lower than the minimum rated output of the boiler. The output of the second stage must not be greater than the maximum rated output of the
boiler.
3.3 Shut-down
For brief periods of inactivity, simply use switch 5 (Fig. 1) on the control panel.
For extended periods of inactivity, as well as operating switch 5, the fuel on-off valve must also be closed.
4
3
1
fig. 4
5
2
7