Ariston 3300949, Manual

Page: 70 / 104

70 / GB
NOTE: Installation with under-floor systems
For under-floor installations, make sure to install a safety device on the heating delivery circuit, as required by DTU 65.11.
For the thermostat hookup, refer to “Electrical connections”.
If the delivery temperature is too high, the system stops in both domestic hot water and heating/cooling modes, and the
remote control will report error code 116 “Under-floor heating thermostat open”. The system will start again when the
manual re-arm thermostat is closed.
VE
1
6
4 5
7
2
8
3
9
1 ZONE WH-L
The circulation pump which drives the fluid between the external unit and the heating/cooling system in positioned in the
external unit. The unit also has three “2 kW” heating elements and an expansion vessel.
Legend:
1. Internal unit
2. External unit
3. External sensor
4. High-temperature heating zone
/ Low temperature cooling zone
(with fan coil unit)
5. Heating/low temperature cooling
zone
6. System interface and Sensys Net
7. Filter
8. Cartridge Anti-freeze
9. By pass (optional)
VE
1
2
3
6
7
4
5
8
9
1 ZONE WH BUFFER
Legend:
1. Internal unit
2. External unit
3. External sensor
4. High-temperature heating zone
/ Low temperature cooling zone
(with fan coil unit)
5. Buffer
6. System interface and Sensys Net
7. Filter
8. Cartridge Anti-freeze
9. By pass
NOTE: The temperature probe to use with the buffer must have the following characteristics:
NTC R (25°C) = 10 KΩ ± 1% - ß (25/85) = 3977 ± 1%