Bosch Worcester Greenstar CDi Classic System ErP Series - Page 39

SERVICING AND SPARES
6 720 815 724 (2015/11) 39
Fig. 61 Control panel
▶ Press and HOLD performance test button (J) for 10 seconds and set
Central Heating temperature to maximum.
– The performance test button will illuminate continually.
– The boiler will stay in this mode for 15 minutes unless the central
performance test button is pressed again.
▶ Pull the cover off and connect a manometer to the fan pressure test
point.
▶ After measurement replace test point cover.
Fig. 62 Fan pressure readings
• Pressures readings in the black area will indicate that the heat
exchanger requires attention/cleaning.
• There is a special accessory kit available specifically designed for
cleaning the heat exchanger.
Part number 7 719 001 996.
Fig. 63 Fan pressure test point
1
2
3
4
5
6
max
2
3
1
04
bar
1
reset
eco
1
2
3
4
e
6
maxmin
A
J
B
K
C
L
D
M
E
F
G
H
I
6720647361-23.2Wo
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FAN PRESSURE TEST
Clean the Heat Ex.
Heat Ex. ok
NG Boilers
0
-6
-5
-4
-3
-2-1
-8
-7
mbar
30 CDi:
35 CDi:
- 3.9
- 5.3
LPG Boilers
0
-6
-5
-4
-3
-2-1
-8
-7
mbar
30 CDi:
35 CDi:
- 3.9
- 5.3
NOTICE: Air/Gas ratio
▶ After servicing the CO/CO
2
must be checked using
the procedure in the section “Setting the air/gas
ratio” on page 41.
▶ The setting of the air/gas ratio must be carried out by
a competent person.
Setting the air/gas ratio must not be attempted
unless the person carrying out the conversion is
equipped with a combustion analyser conforming to
BS 7927 and is competent in its use.
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