15
3. installation
3.2.7 Underfl oor heating
For appliances with underfl oor heating, fi t a safety thermostat
onto the underfl
oor heating outlet. For the electrical
connection of the thermostat see the section on “Electrical
connections - page 25”.
If the outlet temperature is too high, the boiler will stop both
domestic hot water and the heating production and the error
code 1 16 “fl oor thermostat contact open” will appear on the
display. The boiler will restart when the thermostat is closed
during automatic resetting.
If the thermostat cannot be installed, the underfl oor heating
equipment must be protected by a thermostatic valve, or
by a by-pass to prevent the fl oor from reaching too high a
temperature.
3.2.8 Water circuit diagram
A
I
B
C
D
E
1
2
3
5
4
6
7
11
9
10
16
17
18
19
20
21
22
13
15
14
Legend:
1. Modulating F
a
n
2. Overheat Thermostat (Main Heat exchanger)
3. Air relief valve
4. Central Heating Flow Temperature Probe
5. Main Heat Exchanger
6. Gas Valve
7. Safety valve
9. Secondary Exchanger
10. Automatic By-pass
11. Condensate Trap
13. D.H.W. Flow Switch
14. Central Heating Filter
15. Drain valve
16. Pressure Gauge
17. Switch
On/Off
18. Diverter valve
19. Circulation Pump with air release valve
20. Central Heating Return Temperature Probe
21. Expansion
vessel
22. Ignition
Electrode
Detection
electrode
Fig. 3.11
Summary of Contents for EGIS HE 24
Page 63: ......
