Installation Manual
Gas Fire Heater – Cod. 99962NA – November 2002
8
GAS OPERATION AND ADJUSTMENTS
Conversion of the water heater from NATURAL GAS
to LPG and vice versa
must be performed by
qualified personnel only.
Conversion is performed
as follows:
1 -
Make sure to disconnect the power supply and
that the gas tap is closed.
2 -
To replace the main burner injectors: Separate
the burner manifold from the burner ramps by
unscrewing the 4 screws (see fig. A) with a
cross-point screw driver. Unscrew the gas tube
with a size 24 hexagonal wrench (see fig. A
no.2). Replace the injectors on the manifold by
using (see fig. A no. 3) a size 7 wrench (for LP
GAS: 16 injectors Ø 0.75, for natural gas: 16
injectors Ø 1.20). The injectors must be installed
with new gaskets. Reassemble the entire burner
unit.
Attention:
after every disassembly and re-
assembly of gas connections, check carefully
with soap and water.
3 -
Move the selector / link on the printed circuit
board mod.W4115C1000B according to the gas
required. (see fig. B).
4 -
Replace the gas setting plate indicating gas type
and pressure. When converting the boiler to
function with a different type of gas, remove the
existing plate and replace it with a new one
supplied in the conversion kit.
FAN OVER-RUN (Lime-scale prevention)
To avoid the appliance reaching too high
temperatures due to long-time operations and
maximum flue lengths,
it is possible to set a fan over-run timer adjustable
from 0 to 8 minutes.
+
Ele
ctron
ic
Ign
ition
Bo
ard
S4
565
QM
101
2
ADJUSTMENT
SLOW/FAST IGNITION
-
SELECTOR
NAT. GAS
CONNECTOR
LPG
FIG. B
FIG. A
MANIFOLD
GAS RAMPS
1
3
2
PRINTED CIRCUIT BOARD SELECTOR / LINK
