Sime RMG Mk.II Serie Manuel D'installation page 56

IT
ES
done by SIME in the factory. Consequently
they should not be altered. Only when you
switch to another type of gas (butane or
PT
propane) is it permitted to alter the opera-
ting pressures.
GB
It is essential that this operation be car-
ried out exclusively by authorized techni-
cal staff. When the working pressures
FR
have been adjusted, reseal the regulators.
When the gas pressures are to be reset,
BE
this must be done following a set order: first
the maximum pressure and then the mini-
GR mum.
RO
4.3. 1 Nominal pressure
adjustment (fig. 11/a)
RUS
Connect the manometer to the pressure
test point located on the burner manifold,
turn boiler ON, and wait until a steady read-
ing on the manometer is obtained. Compare
this reading with that shown in Table 1. If any
correction is required, use an 8mm spanner
on the high pressure adjuster (1) turning
clockwise to increase, counter-clockwise to
decrease the pressure.
4.3.2 Reduced pressure
adjustment (fig. 11/a)
Turn the boiler OFF, and remove the plug
from the High - Low Coil. Turn the boiler ON
and wait until a steady reading on the
manometer is obtained. Compare this read-
ing with that shown in Table 1.
If any correction is required, use a 3.5 mm
flat blade screwdriver to rotate the low
adjust screw (2), turning clockwise to
increase and counter-clockwise to decrease
the pressure.
When all adjustments are completed,
replace the plug on the coil, and the cap over
the adjustment screws.
4.4 GAS CONVERSION
To convert to butane gas (G30) or propane
gas (G31), the main nozzles must be repla-
ced with another supplied in the boiler gas
conversion kit and apply the LPG adaptor
code 6248301 onto the gas valve (5 fig. 10).
To adjust the operating pressures, refer to
section 4.2.
When the working pressures have been
adjusted, reseal the regulators.
After have ultimated the conversion of the
boiler, please stick onto the casing panel
the plate showing the relevant feeding gas
which is included into the conversion kit.
NOTE:
After assembling all the gas connections,
a test for gas tightness must be carried
out using soapy water or special pro-
ducts.
Do not use naked flames. The conversion
to different gas must be carried out exclu-
sively by authorized technical personnel.
54
4.5 SHELL
DISASSEMBLY
Follow the steps described below to disas-
semble the shell (fig. 12):
– Remove the shell door (1) which is atta-
ched with pressure fit pins.
– To remove the cover (3) loosen the two
screws that attach it to the flue gas
chamber and lift.
– Remove the top front panel (2) placing it
against the flue gas chamber.
– Disassemble the left side (4) unscrewing
the nuts that attach it to the tie rods.
– Do the same operation to disassemble
the right side (5).
– Remove the inner wall (6) by pulling it
forward.
– Unscrew the nuts that secure the rear
wall (7) to remove it from the tie rods.
KEY
1 Maximum pressure adjusting nut
2 Minimum pressure adjusting screws
3 Plastic cap
4.6 CLEANING AND
MAINTENANCE
At the end of each heating season, it is
essential to have the boiler thoroughly
checked and cleaned out.
Proceed as follows:
– Turn the main switch off to stop electric
power reaching the boiler and close the
gas feed cock.
– Remove the shell door and cover.
– Remove the top panel of the flue gas
chamber attached to it with self-threa-
ding screws.
– Remove the gas unit.
– Insert a special brush from the top into
the rows of pins in the cast iron exchan-
ger and move the brush up and down to
remove the scales.
– Remove the burner from the nozzle hea-
der and aim a jet of air toward the inside
Fig. 11/a
Fig. 12