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
Assistance 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 indications
in the specific section and apply the new identification label
contained in the kit.
R
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 air pressure switch wires
- Unscrew the 2 screws (
A
) and remove the bracket and pressure
switch assembly
- Disconnect the mixer gas train (
R
). 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
aluminium 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
- Substitute mixer + nozzles with the ones contained in the kit
- Assemble the mixer with the flap horizontally and the spacer clips
at 120° as shown in figure
- Assemble the gas train in reverse order
- Refit the bracket and pressure switch assembly on the mixer and
reconnect the air pressure switch wires
- 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”.
C
Routine maintenance
Pay particular attention when handling the mixer: the check valve
protrudes from the body, therefore rest the mixer on the air inlet side
(flap area) or if it is necessary to place it on the side of the check
valve, make sure it is inside the body.
Never place the weight of the mixer on the check valve.
During the annual cleaning of the system, clean the venturi from
any dust with a vacuum cleaner. Check the operation of the flap and
the check valve (all open at nominal output, all closed at minimum
output).
flap
horizontal
clip
clip
clip
4.12 Boiler cleaning
Before any cleaning operation, switch off the electrical supply by
turning the system's main switch to "Off".
External cleaning
Clean the housing, the control panel, the painted parts and the plastic
parts with a cloths dipped in soap and water.
In the case of stubborn stains dampen the cloth with a mixture of 50%
water and methylated spirit or with specific products.
Do not use fuels and/or sponges soaked in abrasive solutions
or powder detergents.
Internal cleaning
Before starting internal cleaning operations:
- Close the gas shut-off valve
- Close the system taps.
