3
CHECKS AND MAINTE-
NANCE
3.1 HYDRAULIC DIAGRAM.
Key:
1 - Fan
2 - Sealed Chamber
3 - Safety thermostat
4 - Primary heat exchanger
5 - DHW probe (hot water output)
6 - Burner
7 - Gas valve
8 - Flue pressure switch
9 - Fumes hood
10 - One way valve
11 - Flow limiter
12 - Flow rate meter
13 - DHW probe (cold water input)
14 - Domestic hot water inlet valve
AC - Domestic hot water outlet
AF - Domestic cold water inlet
G - Gas supply
17
3-1