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14
LEGEND:
1. Fan
2. Main Heat Exchanger
3. Overheat Thermostat
4. Burner
5. Ignition Electrodes
6. Detection Electrode
7. Motorised Valve
8. Main Circuit Temperature Probe
9. Main Circuit Flow Switch
10. Automatic By-pass
11. Domestic Hot Water Temperature Probe
12. Secondary Heat Exchanger
13. Gas Valve
14. Domestic Hot Water Flow Switch
15. Domestic Water Inlet Filter
16. Pressure Gauge
17. Safety Valve
18. Circulation Pump with Automatic
Air Release Valve
19. Expansion Vessel
20. Air Pressure Switch
A. Central Heating Flow
B. Domestic Hot Water Outlet
C. Inlet Gas
D. Domestic Cold Water Inlet
E. Central Heating Return
2.13 WATER CIRCUIT DIAGRAM
FIG. 2.14
UJ
K
M
L
R
SQT
ON
FIG. 2.13
SF014A
SI017A