Ariston NIMBUS EXTERNAL UNIT 04 Technical Instructions For Installation And Maintenance page 52

CONNECTIONS BETWEEN INTERNAL UNIT AND EXTERNAL UNIT
ATTENTION
The electrical connections are made after completing all hydraulic connections.
1 ZONE MGP
The internal unit has a circulation pump which drives the fl uid between the external unit and the heating/cooling system.
The unit also has two 2 kW heating elements and an expansion vessel.
3
2
7
8
2 ZONE MGP
The internal unit has a circulation pump which drives the fl uid between the external unit and the hydraulic separator.
The unit also has two 2 kW hating elements, an expansion vessel, two more circulation pumps and a mixer valve to supply two heating/cooling
zones at different temperatures.
2
NOTE: Installation with under-fl oor systems
For under-fl oor 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-fl oor heating thermostat open". The system will start again when the manual re-arm thermostat is closed.
52 /
VE
(*)
3
VE
9
10
Legend:
1. Internal unit
2. External unit
1
3. External sensor
4. High-temperature heating zone /
Low temperature cooling zone (with fan coil
unit)
5. Heating/low temperature cooling zone
6. Sensys system interface
6
7. Filter
8. Cartridge Anti-freeze
(*) Auxiliary pump (not supplied)
4
Legend:
1. Internal unit
2. External unit
1 3. External sensor
4. Two high and low temperature heating/cooling zones
5. Two low temperature heating/cooling zones
ì6. Two zones: high temperature heating or low temperature cooling
7. Sensys system interface
8. Zone Control room sensor
9. Filtre
10.Cartridge Anti-freeze
4
5
7
8
5
6