Minimum Rate - Saunier Duval ISOTWIN CONDENS F 35 E Instructions For Use, Installation & Servicing

• Attach combustion analyser to the
combustion test point.
• Turn on the mains electrical supply and
turn on the gas service clock. Switch
the boiler on.
• Fully open a hot water tap.
• Wait for 2 minutes or so, until the CO2
reading has stabilized.
• Adjust the screw (2) to obtain the CO2
value stated in the following table using
the following principal:
- To increase the CO2 value, turn the
screw anti-clockwise.
- To decrease the CO2 value, turn the
screw clockwise.
Note: After re-fitting the inner front case,
the CO2 values must correspond to that
given in the following table.
9.2

Minimum rate

• Remove the front panel and the inner
panel
Gas changing adjustment
Heating output max. hot water
Heating output min. heating
CO2 case on
CO2 case off
9.3 Reactivation
• After setting and reassembly, restore
the maximum heating power to its initial
value (20 kW).
• Stick the gas data label close to the
nameplate.
• Ensure that the gas analyser is set to
the correct fuel setting - Propane.
• Attach combustion analyser to the
combustion test point.
• Turn on the mains electrical supply and
turn on the gas service cock. Switch
the boiler on.
• Adjust the heating output to minimum
using menu 1 described in the chapter
''Access to the boilers technical data''.
• Wait for 2 minutes or so, until the CO2
reading has stabilized.
• Adjust the screw (1) to obtain the CO2
value stated in the following table using
the following principal:
- To increase the CO2 value, turn the
screw clockwise.
- To decrease the CO2 value, turn the
screw anti-clockwise.
Note: After re-fitting the inner front case,
the CO2 values must correspond to that
given in the following table.
Unit G20
kW
kW
% 9 +/- 0.2
% 9.2 +/- 0.3
G31
34.2
8
10.1 +/- 0.2
10.3 +/- 0.3