Ariston CLAS HE R Installation And Servicing Instructions page 46

MAINTENANCE GUIDE
3. HYDRAULIC UNIT
3.3 MAIN HEAT EXCHANGEUR
Tools
1
Remove the two clips and disconnect
the two pipes
Disconnect electrical gas valve, and
electrode (detection and ignition)
2
Pull the heat exchanger towards you
46 /
Remove the four screws and dis-
connect the gas pipe from the gas
valve
Twist the thermal fuse to remove
Time
20 min
Remove the four screws to free the
heat exchanger