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4 Description of the product
4.3
Main components
Fig.7
Component descriptions
9
3
8
22
10
7
11
16
6
Fig.8
Hydraulic layout
Tab.16
Component descriptions
Key
Description
1
Expansion vessel
2
Expansion vessel valve
3
Primary heat exchanger
4
DHW plate heat exchanger (not
on System Models)
5
Pump with automatic air vent
6
CH system pressure gauge
7
Fan assembly
8
Burner / door assembly
22
4.3.1
17
2
1
5
PN-0000262
20
13
21
Key
Description
9
Flue sensor
10
Spark ignition electrode
11
Control box
12
Condensate trap
13
Safety pressure relief valve
14
Gas valve
15
Diverter valve motor (not on
System Models)
16
Boiler controls
List of components
18
19
4
23
15
12
14
Key
17
18
19
20
21
22
23
PN-0000388
Description
Flue adaptor
Heating flow sensor
Safety thermostat
Water Pressure Switch
Condensate outlet
Silencer
Hall effect sensor (not on Sys
tem Models)
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