Green Heating Technology
37
1. Disconnect the boiler from the electrical supply. Remove
the boiler cover as described in the paragraph "Mainte
-
nance operations" on page 27;
2. access the main board and switch
SW1
(see also "Main
board settings" on page 35) accordingly with the avail-
able gas type:
•
OFF
for
Natural gas (G20),
•
ON
for
Propane (G31)
3. ensure that the inlet gas pressure complies with the re
-
quired nominal pressure (see "Technical data" on page
45) and that the gas flow is sufficient to guarantee the
appliance correct work;
4.
open the sealed combustion chamber;
5.
slip off the silicone hose
1
from the fitting
2
of the sealed
chamber compensation plug;
6. unscrew the calibrated plug
2
and replace it with the one
in the conversion kit. The connector to use with Methane
G20 is “silver” coloured and the one for Propane G31 is
“brass” coloured; then, insert the silicone hose
1
on the
sealed chamber compensation plug again;
7. open the sealed chamber, loosen the screw
5
and remove
the bracket
6
;
8. loosen the swivel nut
7
that connects the gas tube
4
to
the gas valve, and unplug the other end of the tube
4
from the fan
3
;
9. remove the diaphragm
8
by attaching a piece of adhesive
tape and lifting it from its seat.
NEVER USE TOOLS
, espe
-
cially through the calibrated hole!
10. insert the diaphragm from the conversion kit, taking care
that
the stamped diameter is facing UPWARDS
and tak
-
ing care to place it correctly inside the gas valve fitting: it
must be flush with the edge, without projecting;
Remark: see "Technical data" on page 45 for the corre
-
spondence between the diaphragm diameter and the
gas type.
11. insert the gas tube
4
in the fan
3
; reassemble the swivel
nut
7
replacing the gasket
;
12. remount the bracket
6
and the screw
5
; close the sealed
chamber;
13. check, with the burner on, that the pressure upstream
from the boiler is:
•
Natural gas (methane) G20
= min.17 - max.25 mbar
•
Commercial Propane G31
= min.35 - max.40 mbar
For detailed setting values, refer to the table "Technical data" on page 45.
Содержание CITY MAX 26 K
Страница 53: ...Green Heating Technology 53 Notes ...
Страница 54: ...Green Heating Technology 54 Notes ...
Страница 55: ...Green Heating Technology 55 Notes ...
