REMEHA Avanta Plus 24s, Installation And Service Manual

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Remeha Avanta Plus
B
R
B
Setting values O
2
/CO
2
for natural gas H / L
Boiler type
Fan speed (rpm) O
2
CO
2
Part load l3 *) % %
24s approx. 1300
5.2
± 0,1
8.8
± 0,1
28c approx. 1300
5.2
± 0,1
8.8
± 0,1
35c approx. 1300
5.2
± 0,1
8.8
± 0,1
39c approx. 1300
5.2
± 0,1
8.8
± 0,1
table 07 Setting values part load CO
2
and O
2
(front panel not
fi tted)
Setting values O
2
/CO
2
for LPG (propane)
Boiler type
Fan speed (rpm) O
2
CO
2
Part load l3 *)
% %
24s approx. 2000
5.1
± 0.1
10.5
± 0.1
28c approx. 2000
5.1
± 0.1
10.5
± 0.1
35c approx. 2000
5.1
± 0.1
10.5
± 0.1
39c approx. 2000
5.1
± 0.1
10.5
± 0.1
table 08 Setting values part load CO
2
and O
2
(front panel not
fi tted)
*) On forced part load, the 2
nd
digit indicates the operating
code.
• Set boiler to part load:
• Press the [enter]- key until l3 appears in the display,
part load has been set.
•
Once the unit has reached the part load fan speed, meas-
ure the O
2
/CO
2
-percentage and compare this to the value in
table 07 .
•
If the values are not in accordance with the table then cor-
rect the gas /air ratio controls using the adjusting screw B
on the gas block.
•
If the value is too low turn the screw B clockwise; this
increases the gas rate – if the value is too high turn the
screw B anti clockwise which decreases the gas rate
Check the flame through the sight glass which should be sta-
ble with a regular orange distribution. Once the unit has been
set to part load, the ‘test at full load’ should be repeated.
z
Ensure that the analysing probe has a gas tight seal in the
sampling point with the probe end in the centre of the flue
duct.
•
Repeat the ‘test at full load’ and ‘test at part load’ as often
as necessary until the correct values are achieved without
further adjustments
z
Ensure that the analysing probe has a gas tight seal in the
sampling point with the probe end in the centre of the flue
duct.
5. Checking/setting the gas/air ratio at part load
LT.AL.W7H.000.043