Check The Air Box; Check The Air Pressure Differential Switch Ps - DeDietrich C 330 ECO Installation, User And Service Manual

C 330 ECO - C 630 ECO
1
3
6
5
(+)
X mbar 8
31/05/2012 - 7600532-01
1
2
T004856-B
(-)
P
2
4
2
(+)
P
1
7
SLOW
5.5 mbar....6,5
T005045-C
7.2.9.

Check the air box

1. Check the air box for pollution.
2. Clean the dirty air box using a vacuum cleaner. Do this from the
connection opening for the air supply hose.
If the air box is dirty, the following components must also
be dismantled and cleaned with compressed air:
Non-return valve.
4
Venturi.
4
Fan.
4
7.2.10. Check the air pressure differential switch
PS
Check the air pressure differential switch +
1. Switch the boiler off.
2. Disconnect the silicon hose on the + side (P1) of the air pressure
differential switch.
3. Take a large plastic syringe and connect a T piece with a hose
connected to the mouth.
4. Connect the + side of the air pressure differential switch to one
end of the T piece with a hose.
5. On the other end of the T piece, connect the + side of a pressure
gauge.
6. Switch on the boiler.
7. Push the syringe in very slowly until the boiler goes into failure
mode; Code l12 / e12 .
8. Make a note of the pressure indicated by the pressure gauge at
that point. A switch pressure of between 5,5 mbar and 6,5 mbar is
fine. A lower or higher switch pressure indicates a problem with
the air pressure differential switch.
7. Checking and maintenance
65