22
Adjustment and control operations must be performed with the heater in operation while heating is underway
AIR CALIBRATION
Electrically disconnect the hea-
ting probe (SM) and connect
the wires to another similar
free probe. Turn the heating
potentiometer knob to the
maximum setting, remove the
knob and connect the differen-
tial manometer (+ sign) to the
air pressure intake [7 - Drawing
1].
Sequence of operations:
1)
Turn on a hot water tap to
bring the boiler up to maxi-
mum hot water power.
2)
Calibrate the air signal using
the maximum fan power
adjustment trimmer [MAX. -
Drawing 3] to obtain the
figure in mmH
2
O shown in
the table:
3)
Turn the heating power trim-
mer anticlockwise to the
bottom of the scale [B -
Drawing 2].
4)
Calibrate the air signal using
the minimum fan power
adjustment trimmer [MIN. -
Drawing 3] to obtain the
figure in mmH
2
O shown in
the table:
GAS CALIBRATION
Connect the differential mano-
meter (+ sign) with decimal
scale in mm or Pascal to the
gas intake [4 - Drawing 4].
Sequence of operations:
1)
Turn the heating power adju-
stment trimmer anticlockwi-
se to the bottom of the
scale [B - Drawing 5].
2)
Open the gas capacity step
all the way [5 - Drawing 6].
3)
Calibrate minimum gas
pressure using the OFF-SET
adjustment screw [6 -
Drawing 6] to obtain the
figure in mmH
2
O shown in
the table:
4)
Close the gas capacity step
[5 - Drawing 6] to obtain the
value in mmH
2
O shown in
the table:
5)
Turn on a hot water tap to
bring the boiler up to maxi-
mum hot water power.
6)
Calibrate the maximum gas
pressure using the gas
capacity step [5 - Drawing
6] to obtain the figure in
mmH
2
O shown in the table:
After completion of calibration operations, check CO
2
values using a combustion analyser. If discrepancies are found with respect to the
values appearing in the tables, correct as necessary:
– Use the OFFSET screw (
6 – Drawing 6) to correct CO
2
at “MIN” output.
– Use the capacity step to correct CO
2
at “MAX” output (
5 – Drawing 6).
30/50 BF
G20
85/95
G31
89/101
“Planet Dewy 30/50 BF”
CO
2
(Methane)
CO
2
(Propane)
“MIN” power
9,0 ±0,3
10,0 ±0,2
“MAX” power
9,0 ±0,3
10,0 ±0,2
7
Drawing 1
B
Drawing 2
30/50 BF
G20
7,6/8,0
G31
7,3/7,6
30/50 BF
G20
7,2/7,5
G31
7,3/7,6
30/50 BF
G20
77/87
G31
86/96
30/50 BF
G20
6,9/7,2
G31
7,2/7,5
Drawing 3
4
Drawing 4
B
Drawing 5
5
6
Drawing 6
GAS CONVERSION
– Close the gas cock.
– Replace the injector (pos. 30)
and the relevant gasket (pos.
45).
– Cut the specified resistance on
the fan control board.
– Test for soundness all the gas
connections using soapy water
or appropriate products.
DO NOT USE NAKED FLAMES.
– Stick onto the casing panel the
plate showing the relevant fee-
ding gas.
– Proceed with air and gas cali-
bration as described below.
28
106
16
14
28
34
35
64
65
45
57
30
29
4.4
BOILER CALIBRATION
Fig. 24
