Boiler Schematic - Baxi PRIME HT 240 Installers And Users Instructions

27. BOILER SCHEMATIC PRIME HT 240 - HT 280 - HT 330
Figure 27
Key:
1 heating delivery cock
2 gas service cock
3 filling the system
4 cold water inlet on/off valve and filter
5
heating return cock
6
DHW NTC sensor / boiler unit NTC sensor
7
DHW priority sensor
8
non return value
9
flow sensor with filter and water flow rate limiter
10 pressure relief valve
11 manometer
12 boiler drain point
13 pump and air separator
14 automatic air vent
15 plate-type DHW heat exchanger
16 gas valve
17 fan
SEALED CHAMBER
heating domestic water gas
inlet outlet
18 gas diaphragm
19 mixer with venturi
20 flue-water exchanger
21 air/gas mixture header
22 flame detector electrode
23 main burner
24 ignition electrode
25 NTC flue sensor
26 coaxial fitting
27 expansion vessel
28 central heating NTC sensor
29 105°C overheat thermostat
30 siphon
31 water pressure switch
32 3-way valve motor
33 three way valve
34 automatic bypass
33
INSTRUCTIONS FOR THE INSTALLER
domestic water heating
inlet return