VOKERA Eclipse 216 ESS Installation & Servicing Instructions Manual - page 22
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20
●
when ‘H’ is displayed in LED 1, press the
MODE button until LED 1 shows an alternating
cursor (see fig. 32);
●
when the digit is to the left, LED 2 shows the first
two digits of the maximum fan speed;
●
when the digit is to the right, LED 2 shows the
last two digits of the maximum fan speed;
●
press the MODE button until a fixed decimal is
shown in LED 1;
●
press and hold the MODE and ‘-–‘ buttons until
‘L’ appears in LED 1;
●
press the MODE button until LED 1 shows an
alternating cursor (see fig. 32);
●
when the digit is to the left, LED 2 shows the first
two digits of the minimum fan speed;
●
when the digit is to the right, LED 2 shows the
last two digits of the minimum fan speed.
NOTE
The actual fan speed displayed may not exactly
match what has been programmed. However,
providing the displayed speed is within 200 RPM
(+/-) of the programmed speed, this is acceptable.
7.3.5
EXIT ENGINEER MODE
Press the RESET button to exit the appliance
engineer mode.
7.4
ADJUSTING THE GAS VALVE
THE GAS VALVE MUST BE SET-UP OR
ADJUSTED WITH THE AID OF A PROPERLY
CALIBRATED FLUE GAS ANALYSER.
Remove the appliance casing as detailed in 4.8.1.
Unclip and remove the air chamber cover. Set the
flue gas analyser to read CO
2
and insert the probe
into the flue analysis test point (see fig. 1). Using
the procedure as detailed in 7.3 & 7.3.4
respectively, enter the appliance engineer mode
and set the fan speed to minimum.
7.4.1
MINIMUM SETTING
With the boiler operating at minimum output the
CO
2
reading should be 8.6% (+/- 0.2%). If the CO
2
reading is correct, proceed to 7.4.2. If the CO
2
reading is incorrect, the minimum gas pressure
must be adjusted as follows:
●
using a suitable screwdriver, very slowly turn the
minimum adjustment screw (see fig. 33) – clockwise
to increase, counter clockwise to decrease – until
the correct value is displayed on the CO
2
analyser
(allow time for the analyser to stabilise).
●
using the procedure detailed in 7.3.4, change
the fan speed momentarily from minimum to
maximum, then back to minimum.
●
check that the correct value is still being
obtained. If not, repeat the above procedure.
7.4.2
MAXIMUM SETTING
The maximum setting must only be checked and/or
adjusted after the correct minimum setting has been
verified. Using the procedure detailed in 7.3.4, change
the fan speed from minimum to maximum.
With the boiler operating at maximum output the
CO
2
reading should be 8.6% (+/- 0.2%). If the CO
2
reading is correct, press the RESET button to exit
the appliance engineer mode. If the CO
2
reading
is incorrect, the maximum gas pressure must be
adjusted as follows:
●
using a suitable screwdriver, very slowly turn the
maximum adjustment screw (see fig. 33) – clockwise
to increase, counter clockwise to decrease – until
the correct value is displayed on the CO
2
analyser
(allow time for the analyser to stabilise).
●
using the procedure detailed in 7.3.4, change
the fan speed momentarily from maximum to
minimum, then back to maximum.
●
check that the correct value is still being
obtained. If not, repeat the above procedure.
●
press the RESET button to exit the appliance
engineer mode.
Remove the analyser test probe from the analysis
test point and refit cap. Refit the air chamber
cover. Refit appliance casing.
NOTE
You should ensure that all radiators or heat emitters
are fully open during the above procedures. This will
ensure that the fan speed (output) of the boiler is not
compromised due to a high flow temperature.
Fig. 33
Maximum
screw
Minimum
screw
Fig. 32
Digit to
the left
LED 2 showing first two
digits of actual fan speed
Digit to
the right
LED 2 showing the last two
digits of the actual fan speed
Fan speed shown is 4198 RPM