Technical data

Series F2 80 C
40 Ed. 06/2011
Figure 25 – Sit 822 Novamix VALVE
4 - Verify that the CO
2
percentage matches the value indicated in Table 4 at page 20.
Otherwise, readjust the off-set, which in any case MUST never be higher than the
maximum off-set value (see Table 8) or lower than the minimum off-set value (see
Table 8), until the CO
2
percentage is equal to the value specified in Table 4 at page
20.
5 - Disconnect the pressure gauge and retighten the fastening screw of the pressure
connector A.
6 - Turn the heater off and switch it on twice or three times to check that the calibration
is stable.
5.2 HOW TO REPLACE THE GAS
To Have: the heater installed and connected to the power and gas supply lines.
The gas replacement operation must be performed by qualified personnel. A
wrong, incorrect or imprudent installation of the gas circuit can cause very
dangerous gas leaks on all the circuit and in particular in the tampered areas.
Moreover, use suitable sealants on all fittings.
If the type of gas indicated on the label does not match that to be used, the appliance
must be converted and adapted to the desired type of gas.
For this operation proceed as follows:
1 - Cut off the power and gas supply lines.
2 - Unscrew the four fastening screws of the gas flange (see Figure 26).
3 - Extract the gas flange/pipe assembly (see Figure 27).
4 - Remove the seal by paying attention not to damage or loose it (see Figure 28).
5 - Replace the nozzle (see Figure 29) and replace the seal.
6 - Secure the gas flange/pipe assembly by the four fastening screws.
7 - Modify the position of the mini dip No. 5, placed on the electronic control board: ON
if the appliance runs on GPL, OFF if the appliance works on natural gas (Figure 30).
8 - Check that the OFF-SET value matches that indicated in Table 8 at page 39.
Otherwise, adjust it as described in Paragraph 5.1 HOW TO ADJUST THE GAS
VALVE at page 39.
A
C
B
A PRESSURE CONNECTOR FOR
OFF-SET ADJUSTMENT
B GAS SUPPLY PRESSURE
CONNECTOR
C OFF SET CONNECTOR