EAS ELECTRIC ETHKH160 Manual De Instrucciones página 59

■Pump operation and space heating/cooling
According to the season, the unit will switch to "heating mode" or "cooling mode" according to the temperature detected by the room
thermostat.
Wiring of room thermostat should follow method A as described in "Connection for other components/For room thermostat".
When space heating/cooling is requested by the room thermostat (24), the circulating pump(2.1) and (7) will start operating and the unit (1) and
(2) will switch to "heating mode"/"cooling mode". The unit (1) and (2) will start operating to achieve the target leaving cold/hot water temperature.
In case of cooling mode, the motorized 2-way valve (8) will close as to prevent cold water running through the floor heating loops (FHL).
■ Make sure to connect the thermostat wires to the correct terminals ( see "For room thermostat" on "Connection for other components")
and to configure the ROOM THERMOSTAT in the user interface correctly (see "Field settings/ROOM THERMOSTAT" ).
■ Wiring of the 2-way valve (8) is different for a NC (normal closed) valve and a NO (normal open) valve! Make sure to connect to the
correct terminal numbers as detailed on the wiring diagram.
The ON/OFF setting of the heating/cooling operation can't be done on the user interface.
■ Domestic water heating and DHW pipe pump operating
Domestic water heating and DHW pipe pump operatiing are as described in "Application 2".
4.4 Application 4
Space cooling and heating application without a room thermostat connected to the indoor unit , but with a heating only room thermostat
controlling the floor heating and a heating/cooling thermostat controlling the fan coil units. Heating is provided through floor heating loops
and fan coil units. Cooling is provided through the fan coil units only.
Outdoor
1
1 Outdoor unit
2 Indoor unit
2.1 PUMP_I (built-in circulating pump)
2.2 Plate heat exchanger
(air to water heat exchanger)
2.3 IBH (built-in backup heater)
2.4 Manometer (built-in)
2.5 Air vent valve (built-in)
2.6 Expansion vessel (built-in)
2.7 Safety valve (built-in pressure relief)
2.8 Water inlet
2.9 Water outlet
2.10 Refrigerant connections
3 User interface (accessory)
3
2
2.5
2.2
2.6
2.3
2.7
2.4 2.1
2.1
2.10 2.9 2.8
19 19
16
6.1
21
6
20
5
6.2
21
Modbus
5 Buffer tank (field supply)
6 Balance tank (field supply)
6.1 Air vent valve
6.2 Drain valve
7 P_o: Outside circulating pump
(field supply)
8 SV2: Motorized 2-way valve
(field supply)
9 Mixing station (field supply)
9.1 Mixing valve
9.2 P_c: Mixing pump
14 Expansion vessel (field supply)
16 Filter (accessory)
17 Non return valve (field supply)
CAUTION
Indoor
14
Th
8 27 9
7 9.1 9.2
M M
Thc Heating/Cooling room thermostat for
FHL1...n Floor heating loop (field supply)
FCU1...n Fan coil unit (field supply)
7
25
FCU1 FCU2
Thc Thc
25
FHL1 FHL2
19 Shut-off valve (field supply)
20 Fill valve (field supply)
21 Drain valve (field supply)
25 Collector (field supply)
26 Bypass volve (field supply)
27 Motorized 2-way valve for activation of
thermostat (field supply)
SP Solar plate (field supply)
Th Heating only room thermostat for floor
heating loop (field supply)
fan coil unit (field supply)
26
FCUn
Thc
FHLn
V.1