Bosch Worcester Greenstar CDi Classic System ErP Series Installation, Commissioning And Servicing Instructions page 39

B
A
L
K
4
3
5
2
J
1 6
max
I
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.
FAN PRESSURE TEST
Clean the Heat Ex.
NG Boilers
35 CDi:
30 CDi: - 3.9
0 -1 -2 -3
LPG Boilers
35 CDi:
- 3.9
30 CDi:
0 -1 -2 -3
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.
6 720 815 724 (2015/11)
C
2
1 1 3
0 4
bar
D
reset
eco
E
F
4
3
e
2
G
1 6
min max
H
M
6720647361-23.2Wo
Heat Ex. ok
- 5.3
-4 -5 -6 -7 -8
mbar
- 5.3
-4 -5 -6 -7 -8
mbar
6 720 812 175-39.1O
Fig. 63 Fan pressure test point
NOTICE: Air/Gas ratio
▶ After servicing the CO/CO
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.
SERVICING AND SPARES
6 720 815 724-22.1O
must be checked using
2
39