15
Performing maintenance
s
5.If the scale cannot be removed by hand, then the appliance will need to be descaled using a descaling agent. Contact the supplier for advice on the preferred descaling agent.
6.Close the cleaning opening. To avoid damage to the tank, tighten the bolts that fasten the lid with a torque no greater than 50 Nm. Use suitable tools for this.
15.3.4Cleaning condensation water discharge
Regular cleaning of the condensation drain and siphon is essential for prevention of blockages.
15.4Gas-side maintenance
15.4.1Introduction
The following steps must be carried out on the gas side:
1.Clean the burner(s).
2.Clean the orifice(s).
3.Cleaning the heat exchanger.
4.Finalizing maintenance.
15.4.2Clean the burner(s)
1.Detach the burner(s)
2.Remove all contamination present on the burner(s).
3.Fit the burner(s)
15.4.3Clean the orifice(s)
1.Detach the orifice(s)
2.Remove all contamination present in the orifice(s).
3.Fit the orifice(s)
15.4.4Cleaning the heat exchanger
15.5Solar collector maintenance
15.6Finalizing maintenance
1.Detach the burner.
2.Clean the combustion chamber of the heat exchanger using a vacuum cleaner and a soft brush.
3.Detach the flue gas discharge.
4.Clean the end of the heat exchanger using tap water.
5.Fit the burner.
6.Fit the flue gas discharge.
Note
Check the pressure differential again after cleaning. If the pressure difference is too low following cleaning, please contact the supplier of the appliance.
See installation or users' manual for the solar collector. If this topic is not covered in the manual, then contact the supplier of the collectors.
To finalize the maintenance carry out the following steps:
1.Fill the appliance (5 "Filling").
2.Start the appliance (9 "Starting and running").
3.Erase the message SERVICE REQUIRED. Do this by pressing once on 
then once on 
.
96 | Instruction manual SGE |