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3 Design and function
3.1 Unit description
The RVD 355-1055 DC room air conditioners have
a REMKO RVD...AT outdoor unit as well as an
RVD...IT indoor unit.
In cooling mode, the outdoor unit serves to output
the heat extracted by the indoor unit from the room
being cooled. In heating mode, the heat taken up
by the outdoor unit can be discharged by the
indoor unit into the room to be heated. In both
operating modes, the output produced by the com-
pressor precisely matches requirements, and
thereby regulates the nominal temperature with
minimal temperature deviations. This "inverter
technology" results in energy savings over conven-
tional split systems and also reduces noise emis-
sions to a particularly low level. The outdoor unit
can be installed in an outdoor area or, providing
that certain requirements are met, an indoor area.
The outdoor unit consists of a cooling cycle with
compressor, fin condenser, condenser fan,
reversing valve and throttle element. The outdoor
unit is controlled by the regulation of the indoor
unit.
The indoor unit is designed for indoor areas, for
suspended ceilings with Euroraster dimensions.
The cassette is hidden behind the suspended
ceiling, only its cover is visible. It is operated by an
infrared remote control. The indoor unit consists of
a fin evaporator, evaporator fan, regulation system
and condensate tray with condensate pump.
Floor consoles, wall consoles, refrigerant piping
and winter fan speed control are available as
accessories.
Refrigerant piping is used to connect the indoor
unit to the outdoor unit.
1
7
8
9
B
A
4
3
5
6
2
3
Fig. 3: System layout RVD 355-1055 DC
A: Outdoor area
B: Indoor area
1: Indoor units
2: Outdoor unit
3: Condensate drainage line
4: Condenser fan
5: Power supply
6: Shut-off valve
7: Suction pipe
8: Injection pipe
9: Control lines
M
M
TE
P SH
T 1
T2
T
3
T 5
P
S
L
M1
M3
T2
T3
T4
T5
M2
PSL
PSH
T1
V1
EEV
FLT
1
B
A
Fig. 4: Cooling cycle schematic RVD 355-1055 DC
A: Outdoor area
B: Indoor area
1: RVD 355-1055 DC
M1: Condenser fan
M2: Compressor
M3: Evaporator fan IT
V1: Changeover valve C/H
EEV: Elec. Expansion valve
FLT: Filter
OEL: Oil return line
PSH: High pressure switch AT
PSL: Low pressure switch AT
T1: Probe, heat gas AT
T2: Probe, air inlet AT
T3: Probe, condenser AT
T4: Probe, air inlet IT
T5: Probe, evaporator IT
REMKO RVD series
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