C.I.B. UNIGAS - M039132CD
40
Removing and cleaning the combustion head
1
By means of the plastic hook
G
, unlock the rod
T
(Fig. 116) which drives the butterfly valve (Fig. 116 and Fig. 118), to disconnect it
from its seat.
2
Remove the screws
V1
,
V2
,
V3
,
V4
and the screws
S1
and
S2
(Fig. 116).
3
Disconnect the ignition cable
CA
from the ignition transformer (Fig. 120).
4
Disconnect the connector
CR
(Fig. 122).
CAUTION: during the assembling phase, before tightening screws V1, V2, V3, V4, mount and tighten screws S1 and S2.
To remove the head, the operator must pull it towards himself. Once the combustione head is removed, check that the air and gas
holes are not obstructed (Fig. 122 -
H
). Clean the combustion head by a compressed air blow or, in case of scale, scrape it off by a
scratchbrush.
Checking the detection current
If the burner locks, execute the following inpesctions. To measure the detection signals refer to the diagrams in Fig. 124 . If the signal is
less than the value shown, check the position of the detection electrode, the electrical contacts and if necessary replace the detection
electrode.
Fig. 57
Fig. 58
Fig. 59
Fig. 60
Fig. 61
V1
V2
V3
V4
S1
S2
T
VT1
VT2
TR
G
LOCKED
UNLOCKED
G
G
CA
CR
H
Connector
µA DC SCALE
2
Detection electrode
Flame
Control box
Minimum detection signal
Siemens LME21-22
3 µA
Summary of Contents for IDEA NG280
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