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AIR BLEEDING FROM BOILER AND WATER HEATER
During the water heater system filling particular attention must be payed to the air bleeding.
Operate as follows:
- Make sure that the manual and automatic air bleed valves are open
- Make sure that the main switch is off
- Fill by turning the loading tap and making water flow in very slowly
- Close the manual valves as they start pouring water in a sequence
- When the manometer shows the desired pressure (0.3 0.5 bar above the plant hydrostatic pressure), close
the loading tap.
- Ignite the boiler to Summer position and let the hot water circulator operate for some minutes
- Stop the circulator, turning the main switch, and make sure that only water flows from the manual air bleed
valves. If air is released, repeat the operation
- Check the pressure on the manometer again
FIRST BOILER IGNITION AND ADJUSTMENT
Remove the pressure intake screw on the gas valve and fix a water column manometer. Open the gas tap.
Check that the upstream gas pressure is equal to or slightly more than the values required in the technical data
table (page 8).
Warning:
if the pressure is more than what indicated in the table, insert pressure reducers upstream of the
boiler or of the boiler room, or contact the gas provider company.
Place the main switch on position
I
.
- Connect the plug or start the switch upstream of the boiler. The voltage presence pilot lamp lights up. If the
voltage presence pilot lamp does not light up:
-
Check the presence of voltage supply
-
Check the boiler connection to the supply mains
- Turn the main switch on
- Set the desired temperatures on the adjusting thermostat (and on the priority thermostat). Set the hot water
adjusting thermostat at 80°C.
- After a few seconds the gas will start exiting from the main burner, and the igniter will set the spark. If this
does not occur:
-
if the control unit is fed, check the fuse; if it is in good working order, replace the control unit
-
If tension is not supplied, check the control unit connections, the main switch, the fume thermostat, the
clock, the room thermostat, the adjustment thermostat, the priority thermostat
- Check that the spark is about 5 mm long and that sets between the ignition electrode and the gas outlet cuts
on the burner. After 10 seconds max., the igniter stops operating and the main burner stays on.
If the main burner does not ignite with the spark, make sure that:
- the gas plant has completely bled
- voltage is supplied to the gas valve
