Boiler Cleaning; External Cleaning - Riello START AQUA 24 BI Installer And User Manual

START AQUA 24 BI
- Disconnect the pressure gauge and refit the pressure tapping point
screw
To complete calibration without memorising the values set, either:
a) set the function selector to
b) disconnect the power supply
Calibration is completed automatically, without memorising the
minimum or maximum values, 15 minutes after activation.
The function is also terminated automatically in the event of a
shutdown or permanent block. Again, values are NOT memo-
rised.
NOTE: to calibrate only the maximum heating value, remove jumper
JP2 (to memorise the maximum value) and then exit the function
without memorising the minimum value by setting the function selec-
tor to OFF or by turning the boiler off at the mains.
After any intervention on the gas valve adjustment component,
seal with sealing paint.
4.9 Converting from one gas type to another
The boiler is supplied to operate with natural gas (G20) or LPG (G30/
G31) according to the specifications on the technical data plate.
However, it may be converted from one type of gas to another by us-
ing the special kits available on request.
- Natural gas conversion kit
- LPG conversion kit
This conversion procedure must only be carried out by the
Technical Assistance Service or by personnel authorised, also
once the boiler has been installed.
For information on assembly, please refer to the instructions
supplied with the kit.
After converting the boiler, it must be adjusted again. Follow
the instructions in the relevant paragraph and apply the new
identification data plate supplied in the kit.
- Turn off the power to the boiler and shut off the gas valve
- Remove the following in sequence: case, air chamber cover and
combustion chamber cover
- Disconnect the spark plug wire
- Unscrew the burner screws
- Remove the cable gland from the air chamber and remove the
burner with the spark plug attached
- Using a box spanner or fork wrench, remove the nozzles and
washers and replace them with those supplied in the kit
Use and fit the washers supplied in the kit only, even for mani-
folds without washers.
- Refit the burner in the combustion chamber and tighten the screws
securing it to the gas manifold
- Position the cable gland with the spark plug wires on the air cham-
ber
- Reconnect the spark plug wire
10
(OFF-unblock)
- Refit the combustion chamber cover and the air chamber cover
- Remove the cover to access the jumpers
- To convert from natural gas to LPG, wire in the jumper at position
JP3
- To convert from LPG to natural gas, remove the jumper from posi-
tion JP3
- Turn the boiler on again and reopen the gas valve
- Adjust the boiler as explained in the chapter "Adjustments". This
must be done exclusively by the Technical Assistance Service.
- Refit the cover
- Apply the adhesive gas identification label supplied in the kit (red
for LPG or yellow for natural gas) to replace the previous version
- Refit the case.
Adjust the boiler as described in the chapter "Adjustments", referring
to the data for LPG.
The conversion procedure must be carried out exclusively by
qualified technicians
On completion of conversion, apply the new ID data plate sup-
plied in the kit.
4.10

Boiler cleaning

Before cleaning, disconnect the electric power supply by switching
the main system switch to "OFF".

External cleaning

Clean the casing, the control panel, the painted parts and the plastic
parts with damp, soapy cloths.
For stubborn stains, dampen the cloth with a 50% water and dena-
tured alcohol mixture, or use specific products.
Never use fuel and/or sponges soaked in abrasive solutions or
powder detergents.
Internal cleaning
Before cleaning the inside:
- Shut off the gas valves
- Close the system taps.
4.11 Cleaning the water tank (fig. 14)
After removing the flange it will be possible to inspect and clean insi-
de the water tank and check the condition of the magnesium anode.
- Turn off the hot water system stopcock and empty the water tank
through the drainage device (fig. 13)
- Loosen the nut and extract the anode (1)
- Remove the nuts (2) blocking the external flange (3) and extract it
- Clean the inside surfaces and remove all the debris through the
opening
- Check the wear conditions of the magnesium anode (1), replace
if necessary
- Check that the gasket (4) is in good condition after extracting it
from the inside flange (5), replace if necessary.
Complete the work of cleaning, re-mount the components working
the other way round to above description.