EAS ELECTRIC ETHKH160 Manual De Instrucciones página 57

4.2 Application 2
Space heating only application without room thermostat connected to the unit. The temperature in each room is controlled by a valve on
each water circuit. Domestic hot water is provided through the domestic hot water tank which is connected to the unit.
SP
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)
The volume of the buffer tank(5) should be larger than 30L. The drain valve(21) should be installed at the lowest position of the water
circulating system.
■ Circulated pump operation
With no room thermostat connected to the indoor unit (2), the circulating pump (2.1) and (7) will operate as long as the unit is on for space
heating. The circulating pump (2.1) will operate as long as the unit is on for heating domestic hot water(DHW).
■ Space heating
1) The unit (1) and (2) will operate to achieve the target water flow temperature as set on the user interface.
2) When circulation in each space heating loop (FHL1..n) is controlled by remotely controlled valves (M1..n), it is important to provide a by-pass
valve (26) to avoid the flow switch safety device from being activated. The by-pass valve should be selected as such that at all time the
minimum water flow as mentioned under "TECHNICAL SPECIFICATIONS" is guaranteed.
■ Domestic water heating
1) When domestic water heating mode is enabled (either manually by the user, or automatically through a schedule) the target domestic hot
water temperature will be achieved by a combination of the heat exchanger coil and the electrical booster heater (when the booster heater
in the tank is configured YES).
2) When the domestic hot water temperature is below the user configured set point, the 3-way valve(4) will be activated to heat the domestic
water by means of the heat pump. In case of large domestic hot water demand or a high domestic hot water temperature setting, the
booster heater (15.1) can provide additional heating.
■ DHW pipe pump operation
1) The DHW pipe pump(11) is used to circulate the domestic hot water through the hot tap water pipes for keeping the water in the hot tap water
pipes in order to make the hot water coming quickly when user open the tap.
2) The DHW pipe pump(11) will operate for a period of time when the time reaches the set timers which have be set by user interface. More
details refer to the manual of user interface.
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
21
6.1
4
6
20
5
6.2
21
Modbus
4 SV1: Motorized 3-way valve (field supply)
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)
10 P_s: Solar pump (field supply)
11 P_d: DHW pipe pump (field supply)
12 T5: Domestic water tank temperature
sensor (accessory)
14 Expansion vessel (field supply)
15 Domestic hot water tank (field supply)
15.1 TBH: Domestic hot water tank booster heater
15.2 Coil heat exchanger for heat pump
Indoor
T1 T2
M1
FHL1
14
7
NOTE
5
Tn
25
26
M2 Mn
FHL2 FHLn
15
10
12
15.3
15.1
15.2
15.3 Coil heat exchanger for solar
16 Filter (accessory)
17 Non return valve (field supply)
19 Shut-off valve (field supply)
20 Fill valve (field supply)
21 Drain valve (field supply)
22 Tap water inlet pipe (field supply)
23 Hot water tap (field supply)
25 Collector (field supply)
26 Bypass valve (field supply)
SP Solar plate (field supply)
FHL1...n Floor heating loop (field supply)
M1...n Motorized valve (field supply)
T1...n Room thermostat (field supply)
23
11
17
17
22
V.1