Technical data

6
2.11 BOILER SCHEMATIC - Alpha 240XE
Alpha 240XP and 240XE - Technical Data
1 - Pressure gauge
2 - Gas service cock
3 - Mains inlet on/off valve and filter
4 - Diverter valve assy.
5 - DHW flow valve
6 - Primary flow valve
7 - Differential pressure sensor
8 - Automatic by-pass
9 - DHW heat exchanger
10 - DHW expansion device (if fitted)
11 - Drain point
12 - Pressure relief valve
13 - DHW flow valve microswitch
14 - Primary flow valve microswitch
15 - Pump and air separator
16 - Automatic air vent
17 - DHW temperature sensor
18 - Primary temperature sensor
19 - Overheat thermostat
20 - Expansion vessel
21 - Gas valve
22 - Main burner injector
23 - Main burner
24 - Ignition electrodes
25 - Flame sensing electrode
26 - Main heat exchanger
27 - Flue hood
28 - Fan
29 - Air pressure switch
30 - Positive pressure point
31 - Negative pressure point
32 - Flue adaptor
33 - Flue sample point
34 - Room sealed chamber
35 - On/off valve
36 - On/off valve and filter
Domestic
Hot Water
Outlet
Gas Cold Mains
Water Inlet
Heating
Return
Heating
Flow
Fig. 3