Sime 25 BF TS2 Manual De Instrucciones página 79

4.3. 1 Valve pressure adjustment
To set the maximum and minimum pressu-
res, proceed as follows (fig. 25):
– Link the column or pressure gauge only
to the tapping point downstream of the
gas valve.
– Disconnect the small pipe from the
VENT of the gas valve (5 fig. 23).
– Remove the cap (1) of the modulator.
– Switch on the boiler and set the sanitary
water on high values.
– Open completely a hot sanitary water
tap.
– Remember that for adjustment, turning
clockwise increases pressure, and anti-
clockwise decreases pressure.
– Adjust the maximum pressure by turning
the nut (3) and setting pressure at the
maximum value indicated in Table 5.
– Adjust the minimum pressure when the
maximum pressure has been adjusted.
– Switch off the power supply to the modu-
lator, keep the sanitary water tap open.
– Block the nut (3) and turn the screw (2)
and set pressure at the minimum value
indicated in Table 5.
– Switch the boiler off and on a few times,
always with the hot sanitary water tap
open, and check that the maximum and
minimum pressures correspond to the
established values; if necessary, correct
the adjustment.
– After regulation, check that the power
supply to the modulator is switched on
again.
– Replace the small pipe on the valve VENT .
– Remove the pressure gauge, taking care
KEY
1 Ring shake 1/2"
2 Counter nut 1/2"
3 Burner manifold
4 Washer ø 6. 1
5 Burners
6 Gas nozzle M6
7 Screw
IMPORTANT: To guarantee
the seal when changing nozz-
les, always use the washer
(4) supplied in the kit, also in
the burner groups for which
it is not foreseen.
to re-tighten the screw to close the pres-
sure tapping point.
– Replace the plastic cap (1) on the modu-
lator and seal everything, if necessary
with a drop of paint.
4.4 MAINTENANCE
To guarantee the functionality and the
efficiency of the appliance, it is neces-
sary to perform periodic checks in com-
pliance with legislative provisions in
force. The frequency of the controls
depends on the type of appliance and
the installation and use conditions. It is,
however, good practice to have a check
performed by qualified technical staff
once a year.
Proceed as follows to clean the genera-
tor:
– Remove the voltage from the boiler and
close the gas supply cock.
– Disassemble the burners-gas collector
unit. To clean, aim a jet of air towards the
inside of the burners to remove any dust
accumulated.
– Clean the bithermal exchanger by remo-
ving the dust and any combustion resi-
dues. Never use chemical products or
KEY
1 Cover
2 Minimum pressure regulation screw
3 Maximum pressure regulation nut
Fig. 24
Fig. 25
77