Instruction manual

31
Figure 28 - Two heaters installation with domestic hot water
recirculating system
1 Cosmogas combi 2 Heating drain cock 3 Sanitary drain cock 4 Gas cock 5- 6 By-pass valve 7 Pressure relief valve, 150 psi 8 Radiator 9 Automatic feed
10 Back-flow preventer
11 Gas inlet
12 Mixing valve 13 Cold water inlet 14 Recirculating pump 15 Recirculating thermostat or
timer
16 Recirculating return line 17 Hot water outlet 18 Cold water outlet
3 - INSTALLATION