1.4
FUNCTIONAL DIAGRAM (fig. 2)
GG HE 25-30-35
GG HE 12-20 T
U
E
G
M
KEY
1 Fan
3 Primary exchanger
4 C.H. sensor (SM)
5 Gas valve
6 D.H.W. exchanger
7 Heating water filter
8 Diverter valve
9 Safety thermostat
10 Circulator with air release vent
11 D.H.W. flow meter
12 Water inlet filter
13 System loading
14 3 BAR safety valve
15
Water pressure valve
16 Automatic bypass
17 Boiler discharge
18 Expansion vessel
19 Condensate drain tap
20 Connection plate (optional)
21 D.H.W. cock (optional)
22 Gas cock (optional)
23 C.H. flow cock (optional)
24 C.H. return cock (optional)
25 D.H.W. sensor (SB)
26 Storage tank discharge (not supplied)
27 D.H.W. expansion vessel (not supplied)
28 D.H.W. safety valve 7 BAR (not supplied)
29 D.H.W. storage tank (not supplied)
30 D.H.W. cock (not supplied)
CONNECTIONS
R
C.H. return
M
C.H. flow
G
Gas connection
E
D.H.W. inlet
U
D.H.W. outlet
S3
Condensation outlet
S3
R
IT
ES
ENG
Fig. 2
65