Ariston CLAS HE R 12 Installation And Servicing Instructions page 20

installation
Before the boiler is used for the first time,
the trap must be filled with water. To do this,
add approximately 1/4 litre of water via the
flue outlet before fitting the flue system, or
unscrew the cap on the trap positioned under-
neath the boiler, fill it with water and refit it
Warning! Insufficient water in the trap can
temporarily cause the flue gas to be expelled
into the surrounding ambient air.
Water circuit diagram
A
1
2
3
4
0
B
C
8
7
6
1. C.H. flow temperature probe
. C.H. return temperature probe
3. Burner
4. Detection electrode
5. Condensate trap
6. Modulating fan
7. Ignition electrodes
8. Thermal fuse