Family Aqua Condens 3.5 BIS
18
ENGLISH
19
4.11
Conversions from one type of gas to another
The boiler is designed to operate with methane gas (G20) according
to the rating plate.
However, it may be converted from one type of gas to another by
using the special kits.
The conversion must be carried out solely by the Technical As-
sistance Service or by personnel authorised by even when the
boiler is already installed.
Refer to the instructions supplied with the kit for assembly.
After conversion, adjust the boiler again following the indica-
tions in the specific section and apply the new identification
label contained in the kit.
A
For disassembly, refer to the instructions provided below:
- disconnect the boiler from the electricity supply and turn off the
gas tap
- Remove the connections cover and the casing.
- Lift and turn the control panel
- Open the air distribution box cover
- Disconnect the mixer gas train (A). Unscrew the fixing screws and
the springs of the mixer to the fan and remove it
- Unscrew the fixing screws of the plastic venturi tubes from the al-
uminium body
- Levering under the teeth (DO NOT FORCE), loosen the plastic
venturi (C) and press from the opposite side until it is completely
extracted from the aluminium body
- With a No. 6 wrench, remove and discard and not reuse the 2 noz-
zles (B), clean the relative seats from plastic waste
- Push fit the 2 new nozzles supplied with the kit up to the threaded
part, then tighten fully
- Assemble the mixer with the flap horizontally and the spacer clips
at 120° as shown in figure
- Assemble the gas train and silencer in reverse order
- Check the number of revolutions of the fan
- Power the boiler and reopen the gas tap
- Complete and attach the data conversion label supplied
- Close the air distribution box cover
- close the control panel
- Replace the connections cover and the casing.
Adjust the boiler as indicated in the chapter "Adjustments”.
B
B
C
Thermal output curve - no. of fan rotations (MTN)
Heat output (kW)
Fan rotations (r
.p.m.) G20
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
6500
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
