3.2 System layout
The unit is designed for a 2-conductor system. The unit can easily be upgraded to a 4-conductor system
using a heating coil available as an accessory.
The 2-conductor system has 2 medium pipes (conductors: supply and return flow) for cooling using a cold
medium and 2 medium pipes for heating using a warm medium. In cooling mode the combined cooling reg-
ister/heating register in the indoor unit extracts the heat from the room air by absorbing it into the operating
medium. A circulation pump transports the heated medium to a chiller which extracts the heat from the
medium in an evaporator and then passes it on to the outside air via a cooling cycle in a condenser. The
cooled operating medium is then fed in once again to the unit medium circuit.
With 2-conductor systems, which are used for cooling or heating, the heating capacity of cold water air-con-
ditioning systems can be generated through a chiller with heat pump function or, in the case of heating sys-
tems, through a boiler or heat pump and fed into the circuit. In heating operation, the indoor unit can deliver
the heat from the operating medium to the room air.
A
2
1
3
6
5
4
B
1
B
2
B
3
1
1
3
3
4
4
C
7
8
9
Fig. 5: Example of system layout of 2-conductor system (heat pump system)
A:
Outdoor area
B1-3: Indoor area 1, 2, 3
C:
Heating room
1:
Chilled / heating water outlet
2:
Condensate collecting drainage
3:
Condensate drainage line
4:
Room temperature controller
5:
Medium piping, cooling or heating mode
6:
Inverter heat pump outdoor unit
7:
Refrigerant piping
8:
Inverter heat pump indoor unit
9:
Buffer tank
REMKO KWK series (DM)
16
Содержание KWK 135 EC
Страница 39: ......
