Adjustment Of Useful C.h. Output - Biasi RIVA COMPACT HE M96.24SM/C2 User Manual And Installation Instructions

Commissioning
lector 8 to the OFF position and then back to
that indicated in Fig. 7.5.
5 Repeat this process two to three times leaving
30 second intervals between each ignition.
Check the ignition pressures and visually
check that the burner lights uniformly and in a
controlled manner.
6 If the burner ignition is not uniformly controlled
then checks should be made to:
--- the flue installation and termination.
--- that the flue gasket as shown in Fig. 6.5 page
27 is in place.
--- 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.
7.9 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. Adjusting the useful cen-
tral output does not prevent the boiler firing at
maximum rate for domestic hot water production.
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
41 (Fig. 7.4) and connect the gauge.
3 Rotate the knob 9 as in Fig. 7.6.
4 Turn the boiler ON positioning the function se-
lector 8 as indicated in Fig. 7.6 and ensure that
the timer selector switch and room thermostat,
if fitted, are set to "heat demand".
Run the boiler in c.h. mode (do not open any
d.h.w. tap).
10 9
Fig. 7.6
5 Keep pressed the reset button 7 for about 10
seconds until the lock--- out signal lamp 6
blinks.
6 The lamps 10 should give the indication as in
Fig. 7.7.
If not, press the reset button 7 repeatedly to ob-
tain it.
Where:
Fig. 7.7
7 Keep pressed the reset button 7 for about 5
seconds.
The boiler runs in C.h mode and the lamp 6 is
switched OFF.
The lamps 10 give the indication as in Fig. 7.8
Where:
Fig. 7.8
8 Rotate the knob 9 in Fig. 7.6 to obtain the pres-
sure to the burner to meet with the central heat-
ing 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 9 and
recorded this in Fig. 7.9 below with an *.
8 7 6
Lamp OFF
Lamp ON
Lamp OFF
Flashing
lamp, alone
or simulta-
neously with
an other
lamp
35