Boiler Schematic - Benchmark Alpha InTec 24X Installation And Servicing Instructions

2.7

BOILER SCHEMATIC

14
21
30
31
4
6
22
29
36
37
2
24
25
1 - Heat exchanger thermal fuse
2 - DHW fl w switch, filter and flow regulator
3 - Diverter valve
4 - Gas valve
5 - Primary temperature sensor
6 - DHW heat exchanger
7 - Main burner
8 - Primary/condensing heat exchanger
9 - Manual air vent
10 - Fan
11 - Pressure differential test points
12 - Flue hood
13 - Overheat thermostat
9 12 34 23
Domestic
Gas
hot water
outlet
Condensate Cold mains
discharge water inlet
14 - Expansion vessel
15 - Automatic air vent
16 - Pump
17 - Drain point
18 - Pressure relief valve
19 - Primary pressure switch
20 - Ignition electrodes
21 - Flame sensing electrode
22 - DHW temperature sensor
23 - Flue sampling point
24 - Gas service cock
25 - Mains inlet on/off valve
26 - On/off valve (2 off)
11 1
-
+
-
+
Primary
Heating
return
Primary
Heating flow
Fig. 2
Alpha InTec C and X - Technical Data
7
20
8
33
32
13
10
5
15
16
17
19
3
35
27
18
28
26
27 - Automatic by-pass
28 - Cyclone separator (if applicable)
29 - Condensate trap
30 - Injector
31 - Venturi
32 - Venturi positive point
33 - Venturi negative point
34 - Flue temperature sensor
35 - Diverter valve motor
36 - Filling loop (if applicable)
37 - Flow regulator (if fitted
7