19
2.7 Converting to another
type of gas
For conversion of the appliance from na-
tural gas to another type of gas, or visa
versa, it is necessary to exchange the
pilot injector and the main injector. The
conversion may only be executed by a
qualfied competent person.
Procedure:
1. Shut the heater down. Close the main
inlet gas valve and switch off the elec-
tricity supply at the main switch;
2. Remove the burner assembly;
3. Replace the injectors with the correct
injectors from the conversion set.
(see table below).
Remark:
- When conversion of the appliance
from natural gas to another type of
gas, fix the screw on the gas block of
the burner pressure control as far as
the stop.
- When conversion of the appliance
from another type of gas to natural
gas, then the right burner pressure
should be adjust.
2.8 Maintenance
To ensure safe and efficient operation of
the water heater it is recommended that
it is cleaned and serviced at least once a
year by a qualified competent person.
2.8.1 Sacrificial anode
The life cycle of the anode is determined
by the quality and the quantity of the wa-
ter flowing through the water heater. It is
therefore recommended that the anode
be inspected and replaced if necessary
at least once a year.
1. Close the stop cock in the cold water
supply pipe;
2. Open the nearest hot water tap in or-
der to allow the pressure to drop from
the water heater and the pipes;
3. Slacken the anode with a fitting
wrench;
4. Check the anode and replace it if it
has been reduced in diameter by 60%
or more at any point on its lenght;
5. Check for water leaks.
If is necessary to replace the anode it
should be replaced by one of the same
type. The type of anode required can be
detemined on the basis of the type of the
appliance and the serial number.
Unit
SCE 75-75
SCE 100-95
G20
G30
G31
G20
G30
G31
Inlet pressure
mbar
20
30
37
20
30
37
Burner pressure
mbar
12.0
30
37
7.9
30
37
Diameter main
injector
mm
3.90
2.30
2.30
4.50
2.35
2.35
Diameter pilot
injector
mm
0.56/
0.41
0.23
0.23
0.56/
0.41
0.23
0.23