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3 Design and function
3.1 Unit description
In cooling mode, the MVV outdoor unit (OU) serves
to output the heat extracted by the indoor unit (IU)
from the room being cooled. In heating mode, the
heat taken up by the outdoor unit can be dis-
charged by the indoor unit into the room to be
heated. In both operating modes, the output pro-
duced by the compressor precisely matches
requirements, and thereby regulates the nominal
temperature with minimal temperature deviations.
This "inverter technology" results in energy savings
over conventional split systems and also reduces
noise emissions to a particularly low level. The out-
door unit can be installed in an outdoor area or
,
providing that certain requirements are met, an
indoor area. The indoor units are designed to be
mounted high up on the wall, in an indoor area
(MVW) or for installation in suspended ceilings
(MVD) and are equipped with an electronic flow
regulator. The outdoor unit can be combined with
REMKO indoor units from the series MVW and
MVD that provide sufficient cooling capacity (see
Ä
Chapter 2.1 ‘Unit data’ on page 8). No more
than 130% of the nominal cooling output of the
indoor unit output may be installed. Operation
takes place as standard via an infra-red remote
control. The outdoor unit consists of a cycle with a
compressor, fin condenser, electronic expansion
valve and a condenser fan. The outdoor unit
cooling cycle is controlled by the controller of the
indoor unit. In order to enable operation of the unit
at low outside temperatures, a thermal
condenser pressure regulator serves as winter fan
speed control to regulate the speed of the con-
denser fan.
Refrigerant piping and distributors are used to
establish the connection between the indoor unit
and the outdoor unit.
System layout
The indoor units of unit series MVW / MVD must
always be connected to a Y-distributor or a 4-fold
distributor.
A maximum of 4Y distributors may be used per
outdoor unit and liquid or suction pipe.
With the installation of more than one indoor unit
per level, a 4-fold distributor must be used in order
to distribute the refrigerant.
Exception: Installation of 2 indoor units at the end
of the main line.
5
6
4
3
2
4
B
A
1a
7b
3
7a
8b8a
9b9a
10
1b
3
10
Fig. 7: System layout
A: Outdoor area
B: Indoor area
1 a,b: Indoor units
2: Outdoor unit
3: Condensate drainage line
4: Condenser fan
5: Outdoor unit power supply
6: Shut-off valve
7 a,b: Suction pipes
8 a,b: Liquid pipes
9 a,b: Control lines
10: Power supply to indoor units
REMKO MVV...DC
16
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