Security Warning; Commissioning; Preliminary Checks; First Ignition - Ferroli PREXTHERM RSH 950N Instruction For Use, Installation And Assembly

PREXTHERM RSH N

5.10 Security warning

These boilers are supplied without a control panel.
These boilers are intended to replace PREXTHERM RSH boilers, so the installer must remove the control panel from the boiler to be replaced,
place the control panel on the new boiler and make sure that the bulbs are properly placed in the housings of boiler, as indicated below.
Do not start up these boilers without having carried out these previous steps.
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 smoke box 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:
fig. 14
cod. A73020821 - 2023-09
35
EN