VOKERA Linea Installation & Servicing Instructions Manual - page 29
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7.4 ADJUSTMENTS
If adjustments are required again, for example after ordinary
maintenance you need to replace the gas valve or after converting
from natural gas to LPG or from LPG to natural gas, proceed as
follows.
Maximum and minimum power, minimum and maximum
heating, must be adjusted in the indicated sequence and
only by qualified personnel from the Technical Assistance
Service.
- Turn off the general system power switch
- Remove the casing (fig. 15)
- Move forward and then upwards the lower part of the casing to
unhook it from the support plate
- Lift up the panel and then turn it forward
- Loosen the gas pressure check downstream from the gas valve by
about two turns and connect the pressure gauge to it
- Remove the protection cover of the adjustment screws, using a
screw
- Disconnect the compensation pipe connection from the air
chamber.
CALIBRATION & SERVICE operations must be performed
with the boiler on OFF position. To do this, press the
key
until you see “ENERGY FOR LIFE” scrolling on display.
During the parameters adjustment operations, the
key
assumes the function of ENTER (confirm) and the key the
function of ESC (exit). If you don’t confirm the setting within 10
seconds, the value is not memorized and the boiler returns to
the value previously set.
Setting the password
By holding down the key and then pressing the
key for about
3 seconds, you may access the parameters programming.
The display will show the word PROG and immediately after CODE.
Press ENTER key to confirm.
Enter the password code for accessing the parameters adjusting
function by turning the selector to obtain the value required. Confirm
password by pressing ENTER. The password for accessing the
parameter programming function is located on the back side of the
control panel.
Calibration phases
By turning the selector the CALIBRATION & SERVICE phases scroll
one by one:
- 1
gas type
- 2
boiler power
- 10
DHW mode
- 3
building insulation level (displayed only if an external probe
is connected)
- 45
thermoregulation curve slope (displayed only if an external
probe is connected)
- HH boiler at maximum power
- LL
boiler at minimum power
- 23
maximum heating adjustment
- 24
minimum heating adjustment
GAS TYPE - 1
Adjust the set value as fallows:
- press ENTER to access the parameter value programming.
When you press ENTER the digits start flashing, pointing out the
value previously set
- turn the selector to select desired value (1 MTN - 2 LPG)
- confirm the new set value by pressing ENTER. The digits will
stop flashing.
ABSOLUTE MAX FAN SPEED - HP
Select the parameter HP by turning the encoder; push ENTER
button, it is possible to set the absolute max fan speed that is related
to gas type and boiler output. Modify this parameter only if strictly
necessary.
The value is shown on the display as rpm/100 (i.e. 3600/100 = 36).
The set value automatically modifies the min value of parameter 23.
ABSOLUTE MIN FAN SPEED - LP
Select the parameter LP by turning the encoder; push ENTER
button, it is possible to set the absolute min fan speed that is related
to gas type and boiler output. Modify this parameter only if strictly
necessary.
The value is shown on the display as rpm/100 (i.e. 3600/100 = 36).
The set value automatically modifies the min value of parameter 24.
START-UP FAN SPEED - SP
Select the parameter SP by turning the encoder; push ENTER
button, it is possible to set the start-up fan speed. Modify this
parameter only if strictly necessary.
The value is shown on the display as rpm/100 (i.e. 3600/100 = 36).
GAS VALVE MAXIMUM SETTING - HH
Select the HH parameter by turning the encoder; the boiler starts at
the maximum power, the CO
2
reading should be as shown in the
table below(for LPG see 9.2.
If the CO
2
reading is correct, pass to gas valve minimum setting
(7.4.7). If the CO
2
reading is incorrect, the maximum gas pressure
must be adjusted as follows: using a 2,5mm Allen key, very slowly
turn the maximum adjustment screw (see fig. 42) – clockwise to
decrease, counter clockwise to increase – until the correct value is
displayed on the CO
2
analyser (allow time for the analyser to
stabilise).
GAS VALVE MINIMUM SETTING - LL
Select the LL parameter by turning the encoder. The boiler starts at
the minimum power, the CO
2
reading should be as shown in the
table above.
If the CO
2
reading is correct, pass to gas valve final setting (7.4.8).
If the CO
2
reading is incorrect, the minimum gas pressure must be
adjusted as follows:
using a 4mm Allen key, very slowly turn the
minimum adjustment screw (see fig. 42) – 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).
RANGE RATED MAXIMUM OUTPUT CH (FAN SPEED) - 23
Select the parameter 23 by turning the encoder. Push ENTER
button and modify the maximum fan speed as indicated in the range
rated table by turning the encoder. Push ENTER button to store the
value.
The values just setted must be recorded on the last page of this
manual.
MINIMUM OUTPUT CH (FAN SPEED) - 24
Select the parameter 24 by turning the encoder. Push ENTER
button, it is possible to modify the minimum fan speed by turning the
encoder. Push ENTER button to store the value.
Exit the CALIBRATION & SERVICE functions by pressing ESCAPE
.
The boiler will go back to off mode, ENERGY FOR LIFE scrolling
on display.
- Reconnect the compensation pipe connection to the air chamber
- Disconnect the pressure gauge and screw back the gas pressure
check screw.
To resume operation, press the
key.
After adjusting the gas valve, always seal it with sealing wax.
LINEA ONE
50
50
rpm
(G31)
(G20)
MAX NR FAN SPEED CH
LINEA ONE
14
14
(G31)
(G20)
MIN NR FAN SPEED
LINEA ONE CO
2
max
9,5
10,5
%
(G 31)
(G 20)
LINEA ONE
63
63
rpm
(G31)
(G20)
MAX NR FAN SPEED DHW
Note
An existing boiler with a measured CO/CO
2
ratio of 0.004/1
or less can be deemed as operating satisfactorily, with a measured
CO/CO
2
ratio of greater than 0.004/1 can be deemed as at risk, with
a measured CO/CO
2
ratio of greater than 0.008/1 can be deemed
as immediately dangerous.
LINEA ONE CO
2
min
9,5
10,5
%
(G 31)
(G 20)