MAINTENANCE INSTRUCTIONS
36
5.4
Gas valve adjustment
P
ARAMETER
P08
-
M
AXIMUM DOMESTIC HOT WATER OUTPUT
Before switching on the boiler to adjust the setting, insert a
pressure gauge in the pressure take-off point
B
on the gas
valve (fig. 1);
To enter the parameters menu, follow the previously
described procedure (
see paragraph
5.2 ‘Accessing the
parameters menu’
- steps 1-5). Select parameter P08.
6.
Use ‘
’ and ‘
’ buttons (D.H.W temperature setting)
and adjust the value of the parameter from ‘99’
(maximum value of default) to the required value according to
pressure-power correlation diagrams (
see paragraph
5.4
‘Gas Data, Heating output maximum pressure diagram’
).
7.
Press mode selection button ‘
’ to confirm and to
render the new adjustment operative. The parameter
number (P08) will appear on the display
.
8.
To exit from the parameters menu, press
simultaneously ‘
’ and ‘
’ buttons
.
9
.
Press mode selection button ‘
’ to select
WINTER mode;
10.
Press reset button ‘
’ for 7 seconds until the number 07
flashes on the display (chimney sweeper function). In this
way, the boiler will run at maximum heating power for 15
minutes; The pressure gauge will indicate the gas
pressure. If this pressure value is different to that on the
rating plate of the boiler (
see paragraph
5.4 ‘Gas Data
’)
remove the modulator plastic cap
A
(fig. 1) and screw in
the nut
C
to adjust the maximum gas pressure. Use a
10mm. spanner.
11.
Now proceed with the
minimum mechanical
gas
pressure adjustment as follows:
-
Disconnect one of the two modulator power supply cables
from the modulator
E
(fig.1 );
-
The pressure gauge will indicate the minimum mechanical
gas pressure;
-
If this pressure value is different from value 1,5 mbar (G20)
/ 4,5 - 6,1 mbar (G30-G31), rotate screw
D
(fig.1 ) until the
pressure gauge indicates the correct value.;
-
Connect the modulator power supply cable back to its
original position on the modulator
E
(fig.1 );
-
Put back the modulator plastic cap
A
(fig.1 ) on the original
position to ensure the correct operation of the modulator.
-
Press mode selection button ‘
’ to deactivate the
chimney sweeper function.
66
P08
Summary of Contents for RSA 24 /8
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