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3
Design and function
3.1 Unit description
In cooling mode the unit (chilled water outlet)
extracts the heat from the interior room to be
cooled into the fin register and passes it on to the
cold operating medium - water or a mix of water
and glycol - within a closed medium cycle. As a
result of the heat exchange the medium heats up
and the emergent air cools the room down.
In heating mode, a warm operating medium warms
the room to be heated. The medium cools down as
a result of the heat exchange.
A valve assembly, which routes the operating
medium through the register (energy is given up)
or past the resister (energy is not given up), is
used to control the cooling or heating capacity.
The unit is designed for use indoors in the lower
wall area (vertical installation) and for ceiling instal-
lation (horizontal installation). Operation is either
individually or in groups using room temperature
regulation or via the building management system.
The unit consists of a fin heat exchanger, circula-
tion fan and two condensate trays for horizontal
and vertical installation.
The available accessories include room tempera-
ture controllers for installation in the unit or on the
wall, heating coil for connection to a 4-wire system,
valve assembly cooling, fan modules, air inlet
plinth, duct parts, grille and condensate pumps.
2
1
Fig. 3: Diagram of a 2-conductor system medium
cycle
1: Cooling register
2: Recirculating fan
3: Medium inlet connection
4: Medium outlet connection
5: Valve assembly (accessory)
3
5
4
2
1
3
4
7
8
6
Fig. 4: Diagram of a 4-conductor system medium
cycle (with heating register)
1:
Cooling register
2:
Recirculating fan
3:
Cooling register connection medium inlet
4:
Cooling register connection medium outlet
5:
Valve assembly (accessory)
6:
Heating register (accessory)
7:
Heating register connection medium outlet
8:
Heating register connection medium inlet
9:
3-way valve assembly heating (accessory)
10: 2-way valve assembly heating (accessory)
5
9
10
15
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