SERVICE AND SPARES
6 720 821 670 (2018/06)
45
7.3
CHECKING FLUE INTEGRITY
The integrity of the flue system and performance of the appliance can be
checked via the flue turret sample points.
Fig. 50 Flue test points
▶ With the appliance case on and the appliance running at maximum.
▶ Insert the analyser probe into the air intake test point.
▶ Allow the readings to stabilise and check that:
– O
2
is equal to, or greater than 20.6%
– CO
2
is less than 0.2%
▶ If the readings are outside these limits then this indicates that there is
a problem with the flue system or combustion circuit, e.g. missing or
dislodged seals.
Fig. 51 Flue integrity test
7.4
FAN PRESSURE TEST
SETTING THE APPLIANCE TO MAXIMUM
1. Remove the three screws retaining the control cover.
2. Remove the control cover.
3. Remove the plastic tool clipped inside the cover.
4. Insert the tool into the switch.
5. Using the tool set the mode switch to maximum output (MAX).
Ensure the appliance is powered up and there is a demand from the
external controls.
The power indicator will flash and the appliance will stay in this mode for
15 minutes if no further change is made to the switch.
Fig. 52 Setting the appliance to maximum
Flue gas sample point
1
Air inlet sample point
2
Table 33 Key to figure 50
2
1
2
2
1
1
6720643895-67.1Wo
6720644744-37.1W
o
This test is to
determine if the heat cell requires
cleaning/attention.
1.
2.
6720644744-31.1Wo
3.
MAX
MIN
NORM
MAX
MIN
NORM
4.
5.
Summary of Contents for Worcester GREENSTAR 12Ri ErP +
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