Settings - Saunier Duval ECOSY 24 E Installation And Operating Instructions Manual

SETTINGS

Gas valve setting
All boilers are tested and factory set during ma-
nufacture. Should it be necessary to reset a gas
valve, for example after replacement, proceed
as follows :
Shut down boiler.
Connect a CO2 analyser to the combustion test
point on the products outlet from the heat
exchanger, see diagram 21.
Alternatively, connect a CO2 analyser to the com-
bustion test point on the flue elbow.
Start the boiler.
Press the «Mode» and «+» buttons simultaneously,
the letter H is displayed and the boiler is now running
at high gas flow rate.
Allow the boiler to run for a few minutes to stabi-
lise and check the CO2 value, refer to table 4.
At the 28E and SB28E the CO2 at high gas flow
rate is automatically controlled.
At the 24E and SB24E the CO2 at high gas flow
rate can be adjusted. To adjust the CO2, turn the
gas valve adjuster until the correct CO2 value is
obtained according to table 4.
Press the «Mode» and «-» buttons simultaneously,
the letter L is displayed and the boiler is now running
at low gas flow rate.
Allow the boiler to run for a few minutes to stabilise
and check the CO2 value, refer to table 4.
To adjust the CO2, remove protective cap (b) from
the gas valve, see diagram 22. Turn the gas valve
adjuster until the correct CO2 value is obtained
according to table 4.
Note :This adjustment must only be carried out by a
suitably qualified engineer.
Bypass
The built-in bypass must be adjusted according to
the requirements of the system. Refer to the flow
rate pressure curve (diagram 3) The boiler is supplied
with the built-in bypass open a half a turn. It is
adjusted by turning the bypass screw (a), see
diagram 23. Turn the screw clockwise to close the
bypass.
When using thermostatic radiator valves (TRV's), a
separate adjustable bypass of 15 mm minimum
diameter must be fitted between the flow and return
of the heating circuit. Any bypass must be fitted
before system controls.
Table 4
6,8 kW
Output
Fan speed 1600 rpm
CO2 with sealed
9,0 %
casing removed
CO2 with sealed
9,2 %
casing fitted
80 %
Start (%)
ECOSY 24 E/ECOSY SB 24 E
G20 G30
24,5 kW 9,9-20,4 kW
5300 rpm 2400-4800 rpm
9,2 % 10,1-10,3 %
9,4 % 10,4-10,6 %
80 % 90 %
Diagram 21
Diagram 22
b
Diagram 23
ECOSY 28 E/ECOSY SB 28 E
G31
11,4-24,5 kW
2400-4800 rpm
11,9-12,1 %
12,3-12,5 %
90 %
a
G20
8,3 kW 28,0 kW
1900 rpm 5700rpm
9,4 % 9,4 %
9,6 % 9,6 %
80 % 80 %
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