Adjustment Of Useful C.h. Output - Biasi GARDA HE SYSTEM M96.28SR/P User Manual And Installation Instructions

Commissioning
--- that the burner and injectors are clean.
--- that the boiler is set for the correct gas used
(see Section Gas Conversion of this manual)
7 If the ignition pressure recorded is not as indi-
cated in the Technical Data then refer to section
"Ignition gas pressure adjustment" of the Ser-
vice Manual for the necessary adjustment pro-
cedures.
Important: after the gas pressure checks and
any adjustment operations, all of the test points
must be sealed and replace the adjustment
protection cap.
7.8 Adjustment of useful c.h.
output
The following procedure allows the output of the
boiler for central heating to be adjusted to meet
the system requirement.
Refer to Fig. 7.11, Fig. 7.12 and Fig. 7.13 (de-
pending on the gas used) and determine the cor-
rect burner pressure appertaining to the output
required for the central heating requirement.
1 Remove the front panel of the case.
2 Open the gas valve outlet pressure test point
35 (Fig. 7.4) and connect the gauge.
3 Rotate the service and installation knob 8 as in
Fig. 7.6.
4 Turn the boiler ON positioning the function se-
lector 7 as indicated in Fig. 7.6 and ensure that
the timer selector switch and room thermostat,
if fitted, are set to "heat demand".
9 8
Fig. 7.6
5 Keep pressed the reset button 6 for about 10
seconds until the lock--- out signal lamp 5
blinks.
6 The lamps 9 should give the indication as in
Fig. 7.7.
If not, press the reset button 6 repeatedly to ob-
tain it.
Fig. 7.7
7 Keep pressed the reset button 6 for about 5
seconds.
The boiler runs and the lamp 5 is switched OFF.
The lamps 9 give the indication as in Fig. 7.8
Fig. 7.8
8 Rotate the service knob 8 in Fig. 7.6 to obtain
the pressure to the burner to meet with the cen-
tral heating system requirements. Refer to the
diagrams shown in Fig. 7.11, Fig. 7.12 or
Fig. 7.13
By rotating clockwise the pressure increases.
9 Make a note of the position of the knob 8 and
recorded this in Fig. 7.9 below with an *.
10 Turn the boiler OFF and ON positioning the
function selector 7 as indicated in Fig. 7.9
9
6 5
7
Fig. 7.9
11 Keep pressed the reset button 6 for about 10
seconds until the lock--- out signal lamp 5
blinks.
Note: during the adjustment the boiler doesn't op-
erate.
12 Press the reset button 6 repeatedly (2 times)
until the lamps 9 give the indication as in
Where:
Where:
8
Lamp OFF
Lamp ON
Lamp OFF
Flashing
lamp, alone
or simulta-
neously with
an other
lamp
7 6 5
33