36
3 - INSTALLATION
1 Cosmogas combi
2 Indirect water heater
3 Heating drain ccock
4 -
5 Back-flow preventer
6 Ball valve to isolate the heater
7 Supply piping to zones
8 Gas cock
9 Feeding cock
10 Ball valve
11 Back-flow preventer
12 Circulating pumps
13 Ball valve to isolate zones
14 Tees with drains to bleed zones
15 Return piping from zones
16
17 I.W.H Aquastat or plate heat
exchanger aquastat
18 Electrical three ways valve
19 Plate heat exchanger
20 Hot water outlet
21 Cold water inlet
22 Gas inlet
23 Hot water outlet from I.W.H.
24 Radiators
25 Mixing valve
R Relays
Connections inside junction
box
GROUND
Figure 33 - Indirect Water Heater installation
This legend is valid also for the next three drawings
