22
Externa 30 O
Cod. 3540T540 - 04/2009 (Rev. 00)
4.3 Hydraulic diagram
fig. 9
43
50
56
81
44
32
20
82
222
5
29-187
16
74
14
114
34
11
7
10
-
+
49
Key
5
Sealed
compartment
7
Gas
inlet
10
Central heating outlet
11
Central heating inlet
16
Fan
20
Burner
assembly
29
Flue gas outlet manifold
32
Central heating pump
34
Central heating temp. sensor
43
Air pressure switch
44
Gas
valve
49
Safety
thermostat
50
Central heating limit
thermostat
56
Expansion
vessel
74
Filling cock system
81
Ignition
electrode
82
Detection
electrode
187
Flue gas restrictor
222
Copper heat exchanger
