Robur Caldaria 100.2 Condensing+ export, Installation, Use And Maintenance Manual

Page: 45 / 56

First start-up
Installation, use and maintenance manual – Caldaria Con export
45
5
5.5.2 Maximum heating power
1. Press the
key of the heating side for the calibration of
the maximum heating power.
2. Check that the CO
2
value complies to the value shown in
Table 5.5 p. 44.
3. If this is not the case, adjust the gas flow adjuster using the
screw 1 (Figure 5.9
p. 44). To increase the CO
2
value turn
the screw counterclockwise and vice versa if you want to de-
crease it.
4. After each adjustment on screw 1 of the gas flow adjuster,
you have to wait about 30 seconds for the boiler to stabilize
itself to the set value.
5. Press the key of the space heating circuit and check
that CO
2
value at minimum power has not changed. If so,
repeat the calibration described in previous Paragraph
5.5.1 p. 44.
6. Deactivate the chimney sweep function by switching the
boiler to OFF mode using the button ( symbol
appears on the display).
7. Disconnect the flue gas analyzer and screw the cap of the
flue gas analysis socket back on.
8. Replace the boiler front panel.
5.6
GAS CHANGEOVER
Paragraph reserved exclusively to TACs.
The following instructions apply to both the conversion
from natural gas (G20) to any other gas and vice versa.
Check that the gas supply line is suitable for the new fuel
type used to supply the unit.
How to change gas (Figure 5.11
p. 45)
1. Loosen the two screws 1 from the fixing bushing, and re-
move the air intake pipe.
2. Unscrew the pipe connection connecting the gas valve to
the venturi.
3. Unscrew the three fixing screws 2 of the venturi V with a 10
mm wrench.
4. Unscrew the two screws 3 and press on the back side of the
venturi body C.
5. Replace the venturi with the one suitable for the type of gas
to be used and make sure that the orientation of tooth D is
downwards on the aluminium body.
6. Reassemble the components, proceeding in the opposite se-
quence to the disassembly operations, making sure that the
gasket G is reassembled.
7. Set the boiler to operate with the new type of gas, chang-
ing the value of parameter P02 (gas type selection) from the
control panel (Paragraph 5.4
p. 35).
8. Proceed to the adjustment of the CO
2
value, as described in
Paragraph 5.5 p. 43.
9. Replace the sticker indicating the gas type on the appliance
with the sticker for the new gas type.
Figure 5.11
Gas changeover
1 Bushing fixing screw
2 Venturi fastening screws
3 Venturi fastening screws
V Venturi
G Gasket
C Venturi backside
1
2
2
V
2
G
3
3
D
C
C
5.7 COMMISSIONING
1. Remove the boiler casing (Paragraph 5.2 p. 34).
2. Power the boiler.
The ignition system will automatically activate the
system venting cycle function shown in the display
with the code F33, which lasts 2 minutes (except the
first time the appliance is switched on, where the du-
ration is 5 minutes).
When function F33 is active, the pump is activated at in-
tervals and the burner ignition request is disabled. The
regular operation of the boiler is allowed only when the
operation is completed.
3. Make sure that the circulator is not locked.
4. If it is locked, wait for the circulator to perform the automatic
unlocking function (duration 3 minutes).
5. If the circulator is still locked, reactivate the automatic un-
locking function of the circulator (a further 3 minutes) by
power cycling the boiler.
6. At the end of the above operations, open the gas tap.
7. To switch the boiler to the heating operating mode, press
the key; the fixed symbol will appear on the dis-
play, indicating that the function has been activated.
8. When the room thermostat contact or the remote control