7
1 Connection for air intake in split system
2 Connection for coaxial pipe or for flue
discharge in split system
3 Automatic air vent
4 Expansion tank
5 Gas valve
6 Safety relief valve
7 Circulator pump
8 Heat exchanger
9 Ignition module
10 Speed control board
11 Domestic hot water priority thermostat
12 Domestic hot water pipe
13 Domestic cold water pipe
2 - GENERAL LAYOUT of the main components
Figure 1 - General layout of the main components
14 Frame
15 Temperature-pressure gauge
16 Multifunction selector
17 Blower
18 Heater temperature control
20 High limit thermostat
21 Gas valve service switch
22 Junction box
23 Electrical control board
24 Cold start thermostat (optional)
