BOILER SCHEMATIC SYLVA FF 24 E

1 - 3-way valve 17 - Expansion valve (6 bar) 2 - Loss of water switch 18 - Domestic expansion vessel 3 - Pump 19 - Drain valve 4 - CVI unit 20 - Fan 5 - Gas valve 21 - Air pressure switch 6 - Ignition electrode 22 - Temperature/pressure relief valve (7 bar) 7 - Injector manifold 23 - Tundish 8 - Flame detection electrode 24 - Non-return valve 9 - Heat exchanger 10 - Bleed valve 11 - Thermistor A - Heating return 12 - Expansion vessel B - Cold water inlet 13 - Anode C - Heating flow 14 - Cylinder D - Domestic hot water flow 15 - Domestic thermostat F - Gas supply 16 - Overheat safety thermostat
L

21

21

H

20 10 11 9 16 13

22

8 7 6 14 18

23

5 4 12 3 15 2 19 1 24 17

ABCDF

Diagram. 4 Shy 115UK 7