Use And Maintenance - Chappee EDENA EVOLUTION EF 1.22 Installation Instructions Manual

4

USE AND MAINTENANCE

4. 1 ACTIVATION AND
SIT 820 NOVA mV
GAS VALVE
ADJUSTMENT (fig. 7)
- Check that both the system and boi-
ler are full of water and fully vented.
Remove the inlet pressure gauge on
the gas valve (7) and engage a water
column gauge. Open the gas cock.
Check that the upstream gas pres-
sure is equal to or slightly higher
than 20 mbar. (Attention: if pressure
exceeds 37 mbar, insert the pressu-
re reducers upstream the boiler or
boiler room).
- Rotate the control knob (1) to the
pilot position. Fully press the control
knob. The gas will start leaking from
the pilot. Switch the pilot on using the
piezoelectric activator. When the
pilot is on, wait about 20 minutes
before releasing the control knob.
The pilot will remain on. Otherwise,
repeat the operation.
- Rotate the control knob to the bur-
ner position.
- Remove the downstream pressure
connection screw on the valve (8).
Move the water column gauge to the
downstream pressure connection.
Tighten the inlet pressure connec-
tion screw.
- Set the required temperature on the
boiler thermostat. When the burner
is fully on, calibrate the burner gas
pressure (using adjustment screw 2)
referring to the values indicated in
the technical data table (point 1.3)
according to the type of gas used.
- Seal the performed adjustment.
- If the burner does not switch on,
check that sufficient voltage reaches
the gas valve.
4.3 ADJUSTING THE GAS
PRESSURE TO BURNERS
Pressure calibration and gas input are
carried out by the manufacturer.
During installation of the equipment,
feed pressure might be different from
standard values.
It is therefore necessary to check
pressure and gas input when igniting
the boiler for the first time.
This test should be performed with the
boiler in full operation (obviously no
other gas appliances should be
working at the same time). Read the
gas meter twice every 6 minutes.
Multiply the consumption by ten to cal-
culate the consumption per hour.
If this value does not correspond to the
24
KEY
1 Control knob
2 Burner pressure adjustment screw
3 Pilot flow rate adjustment screw
4 Thermocouple connection
7 Power pressure connection
8 Burner pressure connection
9 Burner solenoid valve
one in point 1.3, turn the screw of the
pressure regulator on the valve until
the exact value is obtained. Screw
slowly and gradually. Read the gas
meter at least thirty seconds after
regulating the pressure.
4.4 GAS CONVERSION
(fig. 8)
A kit is supplied complete with the
necessary change-over materials for
operation with butane gas (G30) or
propane gas (G31). Operate in the fol-
lowing manner for changing over from
one gas to another:
– Replace the main nozzles and pilot
nozzle supplied in a kit.
– Fully tighten the gas valve adjust-
ment screw (2 fig. 7).
– Set valve input pressure at 30/37
mbar according to the type of gas
by acting on the outer pressure
reducer.
– When the working pressures have
been adjusted, reseal the regula-
tors.
– After have ultimated the conversion
of the boiler, please stick onto the
casing panel the plate showing the
relevant feeding gas which is inclu-
ded into the kit.
NOTE: After assembling all the gas
connections, a test for gas tightness
Fig. 7