SERVICE AND SPARES
Greenstar Ri Compact 6 720 646 610 (2013/12)
36
6.6
FLUE GAS ANALYSIS
COMBUSTION TEST
▶ Connect the flue gas analyser to the flue gas sampling point (1) as
shown in the figure below.
▶ Ensure that the probe reaches the centre of the flue gas exhaust,
adjust the cone on the probe so that it seals the sample point and
correctly positions the end of the probe.
▶ With the Control panel in the service position, press the Service mode
button (1) for more than five seconds.
– The red L.E.D. (2) will flash.
– Turn the control knob to “max” and the boiler will go to maximum
output and the L.E.D. will flash in a five flash sequence.
Fig. 68 Setting boiler to maximum
▶ Run the boiler at maximum output for at least 10 minutes.
▶ Check the CO/CO
2
readings against the information in table 11.
Fig. 69 Combustion test
▶ Check CO is less than 200ppm.
▶ Turn the control knob to “min” and the boiler will go to minimum
output.
– The LED will flash in a two flash sequence.
▶ Check that the CO is less than 200ppm.
▶ Return the boiler to maximum output, by turning the control knob to
“max”, and re-check the CO/CO
2
.
– The LED will flash in a five flash sequence.
▶ If correct, press the Service mode button once and the boiler will
return to normal operation, the LED will not be illuminated.
▶ Re-assemble and refit boiler case.
If the boiler fails the combustion test, check:
1. Air intake for restriction
2. Cleanliness of the heat cell, condition of the burner, plus blockages in
the condensate disposal.
NOTICE:
Combustion testing
▶ Combustion testing must be carried out by a
competent person. Testing must not be attempted
unless the person carrying out the combustion check
is equipped with a Combustion Analyser conforming
to BS 7927 and is competent in its use.
NOTICE:
Gas inlet pressure
▶ Ensure that the gas inlet pressure has been checked
and is satisfactory, refer to section 5.5.1
6720646610-23.1W
o
≈
5 s
5 s
2
1
min
max
NOTICE: Minimum CO2
▶ The minimum CO
2
reading must be at least 0.2 lower
that the maximum CO
2
reading.
Note: Natural Gas and L.P.G. minimum CO
2
has a
tolerance of plus 1.0% to minus 0.5%
CO/CO
2
settings for Greenstar Compact range of boilers
CO/CO
2
should be measured after 10 minutes
Gas type
CO
2
max.
CO
2
min.
Natural gas
9.1% +1 / – 0.5
8.5%
±
1
LPG
10.6% +1/ – 0.5
9.6%
±
1
CO - less than 250ppm
(0.0025 ratio)
Table 11 CO/CO
2
settings
6720646610-35.1W
o
1
