Cleaning The Boiler (Fig. 13); Checking Burner Operation - Ferroli PREXTHERM RSW 92N Instructions D'utilisation, D'installation Et De Montage

PREXTHERM RSW 92N ÷ 600N

8.4 Cleaning the boiler (Fig. 13)

To clean the boiler, proceed as follows:
- The boiler comes with a brush for cleaning the fire tubes.
- Open the front door (1) and remove the turbulators (2).
- Clean the inside surfaces of the combustion chamber and the flue gas path using a brush (3) or other suitable implement.
- Remove the deposits accumulated in the smokebox through the open cleaning door (4). For more thorough cleaning, remove the smokebox
(5) and replace the gasket before reassembling.
- Check periodically that the condensate drain (6) is not blocked.
8.5 8.5 Checking boiler operation
Before starting the boiler and running the functional tests, check that:
- The turbulators are inside the exchanger tubes.
- The cocks on the water circuit and fuel line are open.
- There is fuel available.
- The expansion vessel is suitably filled.
- The pressure of the water circuit, when cold, is over 1 bar and under the maximum limit for the boiler.
- The water circuits have been vented.
- The electrical connections to the mains power and components (burner, pump, control panel, thermostats, etc.) have been completed.
- The phase-neutral connection must be strictly observed, and grounding is mandatory.
After completing the steps described above, the following operations are necessary to start the boiler:
- If the system is equipped with a temperature controller or timer-thermostat, check that they are on.
- Set the room timer-thermostat(s) or temperature controller to the desired temperature.
- Place the main system switch in the "on" position.
- Set the boiler thermostat located on the control panel.
- Place the main switch on the control panel in the "on" position and check that the green indicator light comes on.
The boiler will run the ignition phase, and will remain on until the set temperatures have been reached. If problems occur during ignition or
operation, the boiler will "LOCKOUT," as signaled by the red light on the burner and the red indicator on the control panel. After a "LOCKOUT,"
wait about 30 seconds before resetting the ignition conditions. To reset the ignition conditions, press the burner "button/light" and wait for the
flame to ignite. If this operation fails, it can be repeated a maximum of 2 or 3 times. Then check:
- The instructions manual for the burner.
- The section "CHECKING BOILER OPERATION."
- The electrical connections shown on the diagram next to the control panel. Once the boiler has started, check that it stops and starts again:
- Adjust the setting on the boiler thermostat. - Operate the main switch on the control panel. - Set the room thermostat, timer, or temperature
controller.
- Check that the pumps are not blocked and rotate correctly.
- Check that the boiler shuts down completely by operating the main system switch.
If all conditions are correct, restart the appliance, check the combustion (flue gas analysis), fuel rate, and tightness of the gaskets on the door
and smokebox.

8.6 Checking burner operation

- Check the instructions manual for the burner.
- Follow all local regulations and standards with regard to burner maintenance.
cod. 3541P130 - Rev. 00 - 02/2018
EN
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