Italtherm CITY BASIC - Burner Data, Ignition, and Main Board Access

26
Burner pressure tables
Note: the max heang power adjustment is allowed only in boilers classied as "range rated".
HEAT OUTPUT
Display
value
NATURAL GAS G20 BUTANE G30 PROPANE G31
kW kcal/h mbar mm H
2
O mbar mm H
2
O mbar mm H
2
O
City Basic 24 C
MIN. 8.8 7568 00 2.2 22 4.8 49 4.8 49
10 8600
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2.7 28 5.9 60 6.0 61
11 9460 3.2 33 7.1 72 7.3 75
12 10320 3.8 39 8.3 85 8.8 89
13 11180 4.4 45 9.7 99 10.4 106
14 12040 5.1 52 11.1 113 12.1 124
15 12900 5.7 59 12.7 129 14.0 143
16 13760 6.5 66 14.3 145 16.1 164
17 14620 7.2 74 15.9 163 18.3 187
18 15480 8.0 81 17.7 181 20.7 211
19 16340 8.8 90 19.5 199 23.2 237
20 17200 9.6 98 21.5 219 25.9 264
21 18060 10.5 107 23.4 239 28.8 294
22 18920 11.4 116 25.5 260 31.9 325
MAX. 23.0 19780 99 12.3 125 27.5 281 35.0 357

So ignion pressure is automac and it needs no adjustment.
• The ignion is achieved by means of a burst of electrical sparks, while the burner is supplied with
gas, inially to the MIN pressure set on the valve gas, then pressure increases gradually (so igni-
on ramp) unl the ignion takes place.
• The ame is detected by the ame detecon electrode. When the ame is detected, the spark
burst stops, the so ignion process terminates and the burner will be supplied with the gas
pressure corresponding to the power required by the funcon in progress (domesc hot water
or heang).

Accessing the main board
To access the main board:
 Restore
the supply aer having closed the contol panel
rear cover.
f unscrew the screws 1 and remove the back cover of the
control panel.