Commissioning; Preliminary Checks; First Ignition; Shutting Down The Boiler - Ferroli PREXTHERM RSW 92N Instruction For Use, Installation And Assembly

PREXTHERM RSW N
6.

COMMISSIONING

6.1 Preliminary checks

Once the hydraulic, electrical and fuel connections to the boiler have been made, the following must be verified before starting the boiler:
- The expansion vessel and safety valve are properly connected and cannot be blocked in any way.
- The bulbs for the control and minimum safety thermostats and thermometer have been secured in the corresponding sheaths.
- The turbulators have been positioned in all the fire tubes.
- The system is filled with water and completely vented of air.
- The pump or pumps are operating correctly.
- The hydraulic, electrical, safety device, and fuel connections have been performed in accordance with current local and national legislation.
- The burner has been installed according to the instructions in the manufacturer's manual.
- The mains voltage and frequency are compatible with the burner and the boiler's electrical equipment.
- The system is able to absorb the amount of heat that will be produced.
- The recirculation pump is installed as described in section 5.5.5.

6.2 First ignition

After successfully completing the checks indicated in the previous paragraph, the burner may be ignited for the first time. This must be done by
a technician authorized by the manufacturer of the burner. The technician will be fully responsible for the field of calibration within the declared
and approved output range of the boiler. After opening the fuel on-off cocks and checking that there are no leaks in the supply line, place all
switches in the ON position.
The burneris now ready for first ignition, and for the adjustments that may only be made by the authorized technician.
On first ignition, check that the door, burner flange and connections to the chimney are tight, and that there's a slight negative pressure at the
base of the flue. The fuel rate must match the information on the boiler's rating card. Under no circumstances may it exceed the declared maxi-
mum rated output value. The temperature of the flue gas must never fall below 160ºC.

6.3 Shutting down the boiler

- Set the operating thermostat to the minimum value.
- Turn off the power to the boiler and cut off the fuel supply.
- Let the pumps operate until they are stopped by the minimum thermostat.
- Disconnect the power to the electrical panel.
7.

MAINTENANCE

7.1 General instructions

Periodic maintenance is essential for the safety, efficiency, and long life of the appliance.
All operations must be carried out by qualified personnel. Before performing any cleaning or maintenance operations, the fuel supply must be
cut off after first shutting off the power.
For proper boiler operation and maximum efficiency, the combustion chamber, fire tubes and smokebox must be cleaned regularly.

7.2 Routine maintenance

Maintenance must be scheduled based on the fuel used, number of ignitions, system characteristics, etc. Maintenance intervals can therefore
not be determined in advance.
As a reference, we recommend the following cleaning intervals, depending on the fuel:
- Gas boilers: Once a year
- Gas oil boilers: Twice a year
In any case, local maintenance standards must be observed.
During routine maintenance, remove the turbulators and then brush the tube bundle and furnace. Remove the deposits accumulated in the
smokebox through the open inspection doors. For more thorough cleaning, remove the rear smokebox. If worn, replace the flue gas seal. Check
that the condensate drain is not blocked. Make sure the control and measurement devices on the boiler are working correctly.
On this occasion, record the amount of top-off water used. After analyzing the water, perform a preventive descaling.
After repeated fills, the calcium and magnesium salts dissolved in the water will produce deposits in the boiler, cause the metal plates to over-
heat, and may cause damage that is not attributable to materials or workmanship, and is therefore not covered by the warranty. After performing
cleaning and maintenance operations and the next ignition, check the tightness of the door and smokebox. In the event of combustion leaks,
replace the corresponding gasket.
The operations performed must be recorded in the system logbook.
cod. A73020801 - 2020-11 33
EN