Vaillant ecoTEC pro 24, Инструкция по установке и обслуживанию

Страница: 48 / 56

48
Instructions for installation and servicing ecoTEC / 839592_09
• Remove the air intake pipe (Fig. 7.1, Pos. 2 ).
• Loosen the gas supply pipe on the gas fitting (Fig. 7.2,
Pos. 3 ).
1
3
2
4
Fig. 9.2 Dismantling fan with gas fitting
• Pull out the plug ( 4 ) from the gas valve.
• Pull out the plug ( 3 ) from the fan.
• Remove the three screws ( 2 ) on the burner module ( 1 ).
• Remove the complete “gas valve/fan” unit.
5
Fig. 9.3 Gas fitting/fan screwed joint
• Remove both fixing screws ( 5 ) on the gas valve and
remove the fan from the gas valve.
• Replace the defective component.
Caution!
Mount the gas valve and the fan in the same
position as before.
• Screw on the fan with the gas valve. Please use new seals.
• Install the complete “gas valve/fan” unit in reverse
sequence.
• After completing the work, check for gas leaks and
perform a function check (see section 7.6)!
9.4 Replacing expansion vessel
1
2
3
4
Fig. 9.4 Replacing expansion vessel
Danger!
Before replacing the component, comply with
the safety instructions in Section 9.1.
• Disconnect the appliance from the mains as described
in Section 9.1, and close the service valve in the gas
supply pipe.
• Close the flow and return service valves and drain the
water from the boiler.
• Undo the nut ( 4 ) on the water pipe on the lower side
of the expansion vessel.
• Remove both screws ( 1 ) retaining plate ( 2 ) and
remove the retaining plate.
• Pull out the expansion vessel ( 3 ) forwards.
• Guide the new expansion vessel back into the appliance.
• Re-connect the new expansion vessel using a new seal.
• Refix the retaining plate.
• Check the pressure of the expansion vessel (minimum
pressure 0.75 bar).
If necessary, adjust the pressure to the static height
of the heating system.
• Fill and vent the boiler.
• After completing the work, check for water leaks and
perform a function check (see section 7.6)!
9 Parts replacement