8
1.4
FUNCTIONAL DIAGRAM
PUMP KIT 2/3 ZONE
CONFIGURATION
Fig. 2
KEY
1 Fan
2 Main heat exchanger
3 Main heat exchanger air vent
4 Gas valve
5 Gas rate adjuster
6 C.H. sensor (SM)
7 Flow switch assembly
8 Zone 1 system pump
9 Non return valve
10 Hot water cylinder pump
11 Expansion vessel
12 Drain vent
13 Air relief valve
14 Automatic by-pass
15 D.H.W. Cylinder drain cock
16 Cylinder sensor pocket (SB)
17 Cylinder
18 Sacrificial Anode
19 D.H.W. temperature/pressure relief.
20 Filling loop (optional cod. 8091810)
21 D.H.W. expansion vessel
22 Water pressure transducer
23 System pressure relief valve
24 Condensation trap
25 Limit stat 85°C
26 100°C safety stat
27 System delivery manifold
28 System return manifold
29 Tundish
30 Pressure reducing valve
31 Single check valve
32 Expansion relief valve
33 Tundish expansion relief valve
PUMP KIT 2/3 ZONE CONFIGURATION
(code 8100700/8100710)
34 Zone 2 and 3 system pump
35 Zone 2 and 3 single-acting valve
36 Zone 2 and 3 system bypass