Bosch Worcester Greenstar Ri ErP + Series Installation And Maintenance Instructions Manual page 41

Set boiler to
START
maximum rate.
HERE
<
= less than
≥
= greater than
or equal to
No
Record values.
Do not adjust
the gas valve.
Turn off boiler and
call Worcester, Bosch
Group help line.
0330 123 3366
Fig. 45 Combustion check flow chart
6 720 821 670 (2018/06)
Zero the analyser
in fresh air.
See notice above
O ≥ 20.6%
2
No
CO < 0.2%
2
Yes
Check all seals around the
CO < 350ppm burner, internal flue seals,
CO/CO ratio
2
< 0.004
Check CO and combustion
Yes
No
Flue integrity test
using analyser
Verify flue integrity
and case seals.
Rectify where necessary.
ratio at minimum rate
CO < 350ppm
CO/CO ratio
2
< 0.004
COMMISSIONING
O ≥ 20.6%
2
Yes
CO < 0.2%
2
No
Check CO and
combustion ratio
at maximum rate
CO < 350ppm
No
CO/CO
2
< 0.004
Yes
Set boiler to
minimum rate.
Boiler is operating
satisfactorily.
Yes
No further action
is required.
6720809056-01.2Wo
ratio
41