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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.
The unit contains a 2-way or 3-way valve assembly
as standard for regulation of the cooling or heating
output. If the circulation pump used in the medium
cycle is not regulated, it is advisable to use a unit
with 3-way valve. In the case of a circulation pump
regulated via proportional pressure, it is advisable
to use a unit with 2-way valve.
Thanks to the new and very robust brushless EC
fans (electronically commutated), the energy con-
sumption, particularly in the low speed range, can
be reduced significantly and the fan speed can be
adjusted infinitely to the requirements. This also
enables an infinitely variable output of the cooling
or heating capacity in order to obtain an even more
constant temperature in the room.
The unit can be operated via numerous controller
options or via an external control signal. The appli-
cations can be adjusted easily using jumpers. The
following controls are possible:
n Single control using the IR remote control
provided by the factory
, alternative cabled
remote control (accessory) with five-stage fan
operation
n Network control for up to 32 units, all units
within a group via a REMKO bus provided by
the factory with five-stage fan operation
n Network control for up to 32 units, certain
units within a group via a REMKO bus pro-
vided by the factory with five-stage fan opera-
tion
n Single control using the wired room tempera-
ture regulation (provided by the customer or
available as an accessory) with three-stage fan
operation or steplessly via 0-10V signal
n Modbus network control via external hard-
ware or CBCS with infinitely variable fan oper-
ation
The units are equipped with a modern EC fan
motor
, plastic housing similar to RAL 9016, inte-
grated 2 or 3-way valve, condensate collection tray
and control board with a large number of switch
contacts.
Cabled remote control, a number of 230V or 0-10V
regulation variants and condensate pumps are
available as accessories.
Scope of delivery
The standard scope of delivery of the units com-
prises:
n Infrared remote control [1]
n W
all bracket for remote control [2]
n 2 screws and wall plugs for wall bracket [3]
n 2 batteries for remote control [4]
n Jumper [5]
2
1
4
3
5
Fig. 2: Scope of delivery
REMKO WLT EC series
16
16


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