
8
1
3
5
7
9
8
15
17
21
16
20
13
18
19
11
10
4
6
2
12
23
22
G
U
E
M
R
1.4
HYDRAULIC CIRCUIT
Fig. 2
GAS
D.H.W.
M.C.W.
FLOW
RETURN
KEY
1 Fan
2 Bithermal exchanger
3 D.H.W. probe (SS)
4 100°C safety stat
5 Combustion chamber
6 C.H. sensor (SM)
7 Gas valve
8 Water pressure switch
9 Temperature and pressure gauge
10 Circulation pump
11 Air relief valve
12 Expansion vessel
13 Automatic by-pass
15 Water flow switch
16 Drain plug
17 D.H.W. filter
18 Safety valve
19 C.H. return cock
20 C.H. flow cock
21 D.H.W. cock
22 Gas cock
Содержание Format B
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