Setting The Boiler Control Function Modes; Reignition Frequency Setting; Ignition Gas Pressure Adjustment - Biasi RIVA COMPACT M90E.24S Service Manual

Electronic starting control p.c.b.
A short pulse every 4 seconds
1 second ON 1 second OFF
Very fast pulses (4 per second)
9.5

Setting the boiler control function modes

It is possible to select the various boiler control function
modes by using the function selector knob A and the
D.h.w. temperature control knob B (Fig. 5).
The knob B is used just for boiler setting and doesn't
affect the boiler functions during the normal operation.
During the function modes setting, the boiler does not
operate.
E A
B
Fig. 5
9.6

Reignition frequency setting

It is possible to select the minimum time that must pass
between two ignitions of the burner in c.h. function
mode.
1 Turn the boiler ON positioning the function selec-
tor knob A as indicated in Fig. 6.
E B
Fig. 6
2 Keep pressed the reset button C for about 10 sec-
onds until the lock ---out signal lamp D blinks.
16
Boiler in stand --- by condition.
(function control in
position). position)
Anti--- freeze system active.
Boiler ON condition
(function control in or
position) position)
Faulty boiler or irregular
operation as:
--- Empty primary circuit
--- No primary circuit flow
--- Lack of burner ignition --- Lack of burner ignition
--- Excessive temperature in
the primary circuit.
--- Faulty temperature probe
--- Faulty air pressure switch
C D
A
C
Fig. 7
3 The lamps E should give the indication as in Fig. 7
--- Fig. 8 (reignition frequency). If not, press the
reset button repeatedly to obtain it.
Fig. 8
At this step it is possible to visualize the current setting
by keeping the reset button C pressed for more than 5
seconds. The lamps E will flash a number of times
corresponding to the setting (Fig. 9).
4 To change the setting turn the knob B on a posi-
tion corresponding to the desidered delay.
By turning the knob B, the lock ---out signal lamp
D blinks quickly (2 per seconds) indicating that
the setting has changed and must be memo-
rised.
0
Fig. 9
5 To memorize the setting keep pressed the reset
button C for about 5 seconds until the lights E
briefly blinks simultaneously.
6 To reset the boiler to the normal operation turn it
OFF and ON by the function selector knob A. In
any case, the boiler automatically resets to its nor-
mal operation after 10 minutes.
Factory setting = 3minutes
9.7

Ignition gas pressure adjustment

1 Turn the boiler OFF.
2 Remove the front panel of the case.
D
3 Open the gas valve outlet pressure test point (8,
see section 10.2) and connect the gauge.
4 Turn the boiler ON positioning the function selec-
tor knob A as indicated in Fig. 10 and ensure that
ON
LD1 LD2
E
Where:
Lamp OFF
Lamp ON
2
3
1 ½
4
3
5
1
2
6
1 7
B
LD3
3 ½
4
Delay (minutes)
Setting No.