17
The flue connector has two apertures, readings can be taken for
the temperature of the combustion by-products and of the
combustion air, as well as of the concentrations of O
2
and CO
2
,
etc. .
To access these intakes it is necessary to unscrew the front
screw and remove the metal plate with sealing gasket.
To achieve the best test conditions, turn the central heating
adjustment knob “
G
” to the “
max
” position and remove the
electrical connection to the heating sensor (see section 6.). This
will allow the appliance to operate at the maximum heating
power.
4.5
C
OMBUSTION
A
NALYSIS
F
IG
. 4.2
In the boiler, it is possible to monitor the correct operation of
the flue exhaust/air intake, checking for a loss of general
pressure in the system. Through the use of a differential
manometer connected to the test points of the combustion
chamber, it is possible to detect the
∆
P of operation of the air
pressure switch.
The value detected should not be less than 0.5 mbar under
conditions of maximum thermal power in order for the boiler
to function properly and without interruption.
4.6
F
UME
D
ISCHARGE
M
ONITORING
F
IG
. 4.3
4. Press the reset button
“E”
for the lighting system; the spark will light the main
burner. If the burner does not light the first time, repeat the procedure.
5. Check the minimum and maximum pressure values for the gas going to the
bur ner ; adjust it if needed using the values indicated in the table in
section 5 (See the relative section for burner pressure adjustment within the
servicing manual).
The boiler is fitted with the following devices (see section 4.2 for references).
1 -
I
GNITION
F
AILURE
:
This indicates ignition failure when a flame is not detected within 7 seconds of
starting an ignition sequence. The L.E.D.
“F”
will illuminate to signal the
shutdown status.
The system can be reset by pressing and releasing the button
“E”
after
checking to make sure that the gas cock is open.
2 -
I
NSUFFICIENT
S
YSTEM
P
RESSURE
:
In the event of insufficient water pressure in the heating system, a safety device
will shutdown the boiler. Check the system pressure on the pressure gauge
“J”
and if it is less than 0.4 bar refill the system to 1.5 bar. Once the system
pressure is at the correct level the boiler will ignite automatically.
3 -
O
VERHEATING
:
This control shuts off the boiler in the case where the primary circuit reaches a
temperature in excess of 105°C.
The red L.E.D.
“F”
will illuminate to signal this shutdown status.
The system can be reset by waiting a few minutes for the primary exchanger to
cool down and then by pressing and releasing the “
E
” button.
4.7
B
OILER
S
AFETY
S
YSTEMS
Summary of Contents for microSYSTEM 10 RFFI
Page 11: ...FIG 2 13 11 FIG 2 12...
