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INSTALLER
USER
MAINTENANCE TECHNICIAN
TECHNICAL DATA
3.4 BOILER HYDRAULIC DIAGRAM.
Key:
1 - D.H.W. probe
2 - D.H.W. ow switch
3 - Gas valve
4 - Flow limiter
5 - System draining valve
6 - Burner
7 - Rapid heat exchanger
8 - Fan
9 - Sealed chamber
10 - Flue pressure switch
11 - Flue hood
12 - System expansion vessel
13 - Flow probe
14 - Safety thermostat
15 - Air vent valve
16 - Boiler pump
17 - System pressure switch
18 - By-pass
19 - 3 bar safety valve
20 - System lling valve
G - Gas supply
AC - Domestic hot water outlet
AF - Domestic hot water inlet
R - System return
M - System ow
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