REMKO RVD 351 DC User Manual

REMKO RVD

RVD 351DC, RVD 521DC

Inverter ceiling-mounted air conditioner in split design

Operation · Technology · Spare parts

Issue D – V03

Contents

Safety notes

Environmental protection and recycling

warranty

Transport and packaging

Description of the equipment

Operation

Shutdown

Care and maintenance

Troubleshooting and customer service

Installation instructions for qualified personnel

Installation

Tightness check

Condensate drain

4

4

4

5

5

6-12

13

13-14

15-16

16-19

19-21

21

21

Electrical connection

Before start up

Add refrigerant

Commissioning

Electrical connection diagram

Electrical circuit diagram

Unit dimensions

Exploded view

Spare parts list

Technical data

22

22

23

23-24

25

25-26

27

28-29

28-29

30

Made by REMKO

These operating instructions should be read carefully
prior to commissioning / operation of the equipment!

These instructions are part of the equipment and must always
be kept in the vicinity of the installation or on the equipment.

Subject to modifications; No liability accepted for errors or misprints!

3

REMKO RVD...DC

Safety notes

Carefully read this manual before
starting the unit for the first time. It
contains useful tips, information as
well as hazard warnings to prevent
injury or material damage. Non­observance of this manual may
endanger persons, the environment
as well as the equipment itself and
will void any claims for liability.

■ Store this manual as well as

the refrigerant datasheet in the
vicinity of the unit.

■ The unit should only be set up

and installed by qualified per­sonnel.

■ The setup, connection and

operation of the unit and its
components must be in accord­ance with the operating condi­tions stipulated in this manual
and comply with all applicable
local regulations.

■ Units designed for mobile use

should be safely set up on a
suitable floor and in a verti­cal position. Units designed for
stationary use should only be
operated in their permanently
installed state.

■ It is prohibited to make modi-

fications or changes to equip­ment or components supplied
by REMKO as this may cause
malfunctions.

■ Equipment and components

should not be operated in areas
where there is a heightened
damage risk. Observe the mini­mum clearances.

■ The electrical supply should be

adapted to fulfil the require­ments of the unit.

■ The operational safety of equip-

ment and components is only
assured providing they are used
as intended and in a fully assem­bled state. Safety devices should
not be modified or bypassed.

■ Do not operate equipment or

components with obvious de­fects or signs of damage.

■ All housing parts and openings,

e.g. air inlets and outlets, must
not be blocked by foreign items,
fluids or gases.

■ The equipment and components

must be kept in a safe distance
from inflammable, explosive,
combustible, aggressive and
dirty areas or atmospheres.

■ Persons coming into contact

with equipment parts may suffer
burns or injury.

■ Installation, repair and mainte-

nance work should only be car­ried out by authorised special­ists. Inspection and cleaning can
be performed by the operator
providing the equipment is not
under voltage.

■ Take appropriate hazard preven-

tion measures when performing
installation, repair or mainte­nance work or cleaning the
equipment.

■ The equipment or components

should not be exposed to any
mechanical stresses, extreme
levels of humidity or direct ex­posure to sunlight.

Environmental
protection
and recycling

Disposal of packaging

All products are packed for trans­port in environmentally friendly
materials. Make a valuable con­tribution to reducing waste and
sustaining raw materials. Only
dispose of packaging at approved
collection points.

Disposal of units and
components

For the manufacture of the units
and components, only recyclable
materials have been used.
Help protect the environment by
ensuring that the units or compo­nents (for example batteries) are
not disposed in household waste,
but only in accordance with local
regulations and in an environmen­tally safe manner, e.g. through
authorised disposal and recycling
specialists or at collection points.

Warranty

Prerequisite for any warranty claims
is that the purchaser or his client
has completely filled out the "war­ranty registration card" included
with any unit within the relevant
time period of sale and initial op­eration and returned it to
REMKO GmbH & Co. KG.
The warranty conditions are listed
in the "General business and deliv­ery conditions. The contractual par­ties can also agree additional terms
beyond the scope of the above.
For this reason please contact your
direct contracting partner first.

4

Transport and
Packaging

The equipment is shipped in sturdy
transport packaging. Immediately
check the equipment on delivery and
make a note of any damage or miss­ing parts on the delivery note. Inform
the forwarding agent and contractual
partner. Warranty claims at a later
date will not be accepted.

Description of the
equipment

The RVD 351-521DC room air
conditioning units have a REMKO
RVD...AT outdoor component as
well as an indoor unit RVD...IT.

The outdoor unit serves to output
the heat extracted by the indoor
unit from the room being cooled.
In heating operation, the heat
absorbed by the outdoor compo­nent can be discharged through
the indoor unit into the room being
heated.SFlbIn both operating modes,
the performance of the compressor
precisely adjusts itself to the de­mand, thereby regulating the target
temperature with minimal tempera­ture variations. This "inverter-tech­nology" enables power saving over
conventional split systems and also
reduces noise emissions to a particu­larly low level.
The outdoor component is mounted
outdoors or under the observa­tion of certain requirements it may
be installed indoors. The outdoor
component consists of a refrigerant
circuit with compressor, fin liquefier,
liquefier fan, reverse flow valve and
flow regulator. The outdoor unit is
controlled via the regulation of the
indoor unit.

Schematic of outdoor refrigerant circuit

Liquefier fan

Liquefier

Schematic of refrigerant circuit in indoor unit - cooling

Vaporiser

System layout

Indoor area

Interior unit

M

Condensation line

Reverse flow valve

M

Filter dryer Restrictor element exp. or capillary tube

Vaporiser fan

Compressor

Connection
Manometer

Connection
valve
Suction pipe

Connection
valve
Injection pipe

Connection to suction pipe

Connection to injection line

The indoor unit is designed for
indoor installation in suspended
ceilings with Euroraster dimensions.
The cassette is hidden behind the
suspended ceiling, only its cover is
visible. Operation is undertaken via
an infrared remote control unit. The
indoor unit consists of a fin vapor­iser, vaporiser fan, regulation system
and condensation pan.

Floor consoles, wall consoles, re­frigerant pipes and a winter control
program are available as accessories.

Outdoor area

Exterior unit

Condensation line

Control line

Mains cable

Injection pipe

Stop valve

Liquefier fan

Suction pipe

The connection between the indoor unit and the outdoor component is
made with refrigerant pipes.

5

REMKO RVD...DC

Operation

The indoor unit is easy to operate using an infrared remote control. This is supplied as standard. The indoor unit
beeps to acknowledge the correct transmission of data. If it is not possible to program
the indoor unit using the remote control, it can also be manually operated.

Manual operation

The indoor units can be started
manually. Press the RESET button
on the receiver unit of the cover to
activate automatic mode. In manual
operation, the following settings
apply:

Cooling mode: 24 °C,
Fan speed AUTO
Heating mode: 26 °C,
Fan speed AUTO

Pressing any button on the infra­red remote control interrupts
manual operation

Display on indoor unit

The lit display LEDs indicate the settings.

LED H red = high fan speed
LED M yellow = medium fan speed
LED L green = low fan speed

Display on indoor unit

Unit for receiving signals
from the remote control

Operation-

screen

Timer­screen

fan

Defrost

Alarm display

infrared remote control

The infrared remote control sends
the programmed settings over a
distance of up to 6 m to the re­ceiver of the indoor unit. Data will
only be received correctly if the
remote control is pointed at the re­ceiver and no objects are obstruct­ing the transmission path.

First insert the supplied batteries
(2 x type AAA) into the remote
control. To do so, pull off the flap
of the battery compartment and
insert the batteries according to
their polarization (see marks).

Maximum distance

max. 6 m

CAUTION

Problems are
shown in code
(see chapter Troubleshooting
and Customer service).

NOTE

Immediately replace flat batter­ies with a new set, otherwise
there is a risk of leakage. It is
recommended that the batteries
are removed if the equipment is
shut down for long periods.

6

Buttons on the remote control

Buttons on the remote control

"ON/OFF" Button

Press this button
to start the unit.

"MODE" button

Press this button
to select the operating mode.
The
indoor unit has 5 modes:

1. Automatic mode
In this mode, the unit works in
cooling or in heating mode.

2. Cooling mode
In this mode, the warm room
air is cooled to the
desired temperature.

3. Dehumidification mode
In this mode
the room is mainly dehumidi­fied, the adjusted temperature is
retained.

4. Heating mode
In this mode, the warm air in
the room is warmed up to the
desired temperature.

5. Circulation mode
In this mode, the air in the room
is recirculated.
Temperature selection is not
possible.

Button "Temp ▲ ▼ "

This button is used to

select the desired temperature
between 17 - 30°C.

"FAN SPEED" button

Press this button to set the

required fan speed. 4 settings
are available: automatic, high,
medium and low fan speed.

"ECONOMIC RUNNING" button

Pressing this button will auto-

matically increase or decrease
the target temperature by 1
°C within an hour in cooling
and heating mode respective­ly.

"AIR DIRECTION" Button

With this button, the desired

fin position can be set. There
are 5 positions and an oscillat­ing function available.

"SWING" Button

This button directly activates

the oscillating function of the
fins for better air distribution
in the room.

"TIMER ON/OFF" button

This button serves to program

the automatic activation time
for the device within the next
24 hours.

"CLOCK" button

This button opens the time

program.

"OK" button

This button transfers the pro-

grammed data to the indoor
unit.

"CANCEL" button
This button stops the set timer

program.

"LOCK / RESET" button
(flush buttons
The left LOCK button pre-

vents subsequent operation,
the right RESET button resets
the display.

7

REMKO RVD...DC

Button functions

A symbol is shown on the display to indicate that the settings are being transferred.

ON/OFF Button

COOL

TEMP

20

C

°

SPEED

pq

Buttons

COOL

TEMP

20

C

°

SPEED

CLOCK

LOW

CLOCK

LOW

10:49

10:49

By pressing the ON / OFF button, you can activate or deactivate your
unit. The programmed settings and adjustment values before the unit
was turned off will appear on the display.

The

TEMP

20

SPEED

p/q

COOL

C

°

ON/OFF ON/OFF

CLOCK

10:49

LOW

buttons can be used to reduce and increase the desired nominal

COOL

TEMP

CLOCK

10:49

20

C

°

LOW

SPEED

temperature.

10:49

p

COOL

TEMP

CLOCK

2i

C

°

LOW

SPEED

COOL

TEMP

CLOCK

20

C

°

LOW

SPEED

10:49

q

COOL

TEMP

CLOCK

10:49

20

C

°

LOW

SPEED

MODE Button

COOL

TEMP

20

SPEED

CLOCK

C

°

LOW

AUTOMATIC MODE

AUTO

TEMP

20

SPEED

CLOCK

C

°

AUTO

10:49

10:49

Use the MODE button to select between the individual operating modes.
A total of 5 modes are available:

1. Automatic automatic selection of cooling or heating operation

2. Cooling predominantly summer operating mode

3. Dehumidification Summer or winter operating mode

4. Heating predominantly winter operating mode

5. Air circulation only for circulation of air SFlb

Automatic Cooling Dehumidification Heating

AUTO

TEMP

2i

°

SPEED

MODE

CLOCK

10:49

C

LOW

COOL

TEMP

2i

°

SPEED

MODE MODE MODE MODE

CLOCK

10:49

C

LOW

DRY

TEMP

CLOCK

10:49

2i

C

°

LOW

SPEED

TEMP

CLOCK

2i

C

°

LOW

SPEED

HEAT

10:49

Air circulation

TEMP

2i

FAN

CLOCK

10:49

C

°

LOW

SPEED

In automatic mode, the control system autonomously selects between
heating, cooling and circulating modes. The nominal temperature can
be preselected and is then applied in automatic mode. The fan speed is
automatically adapted to the given circumstances.

The nominal temperature is
below the room temperature

The nominal temperature is
above the room temperature

AUTO AUTO

TEMP TEMP

CLOCK CLOCK

2i 23

C

°

AUTO AUTO

SPEED SPEED

▲

10:49 10:49

OR

▼

COOLING

or

C

°

HEATING

or

AIR CIRCULATION

8

COOLING mode

COOL

TEMP

20

C

°

SPEED

CLOCK

LOW

10:49

In cooling mode, the air in the room is cooled down to the set target
temperature. The desired room temperature is set with the ▲/▼buttons
in 1 °C increments. If the room temperature is 1 °C above the selected
nominal temperature, the indoor unit starts to cool the air in the room.
The inverter controller checks the difference between the adjusted target
temperature and the actual room temperature. If there is a large differ­ence, the cooling output is very high. If the difference is smaller, a lower
cooling output is produced. This serves to maintain extremely even air
discharge temperature and room temperature.If the adjusted room tem­perature is lower than approx. 2 °C, then the control system turns the
cooling function off. To protect the compressor, the regulation only turns
the cooling on again after a waiting period of 3 minutes.

DEHUMIDIFICATION MODE

DRY

TEMP

20

CLOCK

10:49

C

°

AUTO

TEMP

CLOCK

10:49

2i

C

°

SPEED

MODE

LOW

COOL

TEMP

CLOCK

2i

C

°

LOW

SPEED

10:49

▲

and

▼

FAN

TEMP

CLOCK

2i

C

°

LOW

SPEED

10:49

TEMP

22

FAN

CLOCK

C

°

LOW

SPEED

COOLING

10:49

OPERATION

Functional diagram

Nominal temperature

Nominal temperature -2°C

Compressor operation AT

Fan operation AT

Fan operation IT

Actual temperature

> 6 Min.

30 sec. 30 sec.

> 6 Min.> 3 Min.

Start cooling mode

Cooling mode

Stop cooling mode

Operation

Stop

In dehumidification mode, the room temperature is set to 24 °C. Due to
the low temperature of the refrigerant, the dew point of the air on the
vaporiser is lower. The excess moisture in the air is condensed by the
vaporiser, the room is dehumidified. The fan speed should be set to auto­matic in order to achieve a maximum level of dehumidification. The fan
speed is automatically adapted to the given circumstances.

SPEED

AUTO

COOL

TEMP

CLOCK

MODE

10:49

2i

C

°

LOW

SPEED

2i

Functional diagram

Nominal temperature

Nominal temperature -2°C

Compressor operation AT

Fan operation AT

Fan operation IT

DRY

TEMP

CLOCK

10:49

C

°

AUTO

SPEED

Actual temperature

▲

AND

▼

DRY

TEMP

CLOCK

24

C

°

AUTO

SPEED

Low fan speed

10:49

ON/OFF

DRY

TEMP

CLOCK

24

C

°

AUTO

SPEED

DE-

10:49

HUMIDIFICA­TION­MODE

Start
Dehumidifying mode

Dehumidifying mode

Stop
Dehumidifying mode

30 sec.

Operation

Stop

9

REMKO RVD...DC

HEATING Mode

TEMP

20

C

°

SPEED

CLOCK

LOW

HEAT

10:49

In the heating mode, you can heat the room in spring or fall. The desired
room temperature is set with the ▲/▼ buttons in 1 °C increments. If the
room temperature is 1 °C below the selected target temperature, the in­door unit starts to heat the air in the room. The inverter controller checks
the difference between the adjusted target temperature and the actual
room temperature.
In the event of a greater difference, a higher cooling performance is created.
In the event of a smaller difference, a lower cooling performance is created.
This serves to maintain the air discharge temperature and the room tempera­ture.
If the adjusted room temperature is still exceeded by approx. 2 °C, then
the control system turns the heating function off. To protect the com­pressor, the regulation only turns the heater on again after a waiting
period of 3 minutes.
In heating mode, the indoor unit fan motor is switched on after a delay,
in order to prevent the discharge of cold air.
The fins on the outdoor unit could crack at low outdoor temperatures.
Regular reversal of the cooling circuit results in a defrosting action. The
display shows "H1" during the defrosting period.

Heating mode operational sequence

DRY

TEMP

CLOCK

10:49

2i

°

AUTO

SPEED

MODE

C

HEAT

TEMP

CLOCK

▲

10:49

2i

C

°

SPEED

AND

LOW

▼

HEAT

TEMP

CLOCK

10:49

23

°

SPEED

FAN

C

LOW

HEAT

TEMP

CLOCK

10:49

23

C

°

MED

SPEED

HEATING­MODE

Functional diagram

Stop heating
operation

Heating mode

Start heating
mode

Operation

Stop

Nominal temperature +5 ℃

Nominal temperature +2 ℃

Compressor operation AT

Fan operation AT

Fan operation IT

Reverse flow valve

Actual temperature

> 6 Min.

30 sec. 30 sec.

> 6 Min.> 3 Min.

30 sec. 30 sec.

During the defrosting cycle, the indoor unit vaporiser fan and the out­door unit liquefier fan are switched off.
After the cycle is concluded, the fans are switched to their
previous settings.

Reverse flow valve

Compressor operation AT

Fan operation AT

Fan operation IT

Defrost period

30 sec.

< 7 Min.

15 sec.

30 sec.

60 sec.

30 sec.

3 Min.

Operation

Stop

10

AIR CIRCULATION Mode

TEMP

20

SPEED

CLOCK

C

°

LOW

FAN

10:49

In ventilation mode, the air in the room is only circulated.
The room temperature cannot be changed in this mode.
The cooling or heating operation is not activated.

HEAT

TEMP

CLOCK

10:49

2i

C

°

LOW

SPEED

MODE

TEMP

2i

C

°

SPEED

FAN

FAN

CLOCK

10:49

SPEED

LOW

2i

FAN

TEMP

CLOCK

10:49

C

°

MED

SPEED

AIR CIRCULATION

FAN SPEED button

FAN

TEMP

20

SPEED

CLOCK

10:49

C

°

LOW

ECONOMIC RUNNING button

FAN

TEMP

20

SPEED

CLOCK

10:49

C

°

LOW

The fan speed can be adjusted with this button. A selection can be made
between low, medium, high and automatic fan speed.

TEMP

CLOCK

10:49

2i

C

°

AUTO

SPEED

SPEED

TEMP

CLOCK

2i

C

°

LOW

SPEED

FAN

HEAT

FAN

HEAT

10:49

SPEED

TEMP

2i

C

°

SPEED

FAN

HEAT

CLOCK

10:49

MED

SPEED

TEMP

2i

C

°

SPEED

FAN

HEAT

CLOCK

10:49

SPEED

HIGH

This button activates a programming function, which causes the
target temperature in cooling mode to increase after one hour by 1°C
and after two hours by 2 °C. In heating mode, the target temperature is
decreased after one hour by 1 °C and after 2 hours by 2 °C.
The display on the indoor unit goes out.
The TURBO function is used to activate the maximum fan speed

TEMP

CLOCK

10:49

2i

C

°

AUTO

SPEED

RUNNING

TEMP

2i

°

AUTO

SPEED

ECONOMIC

HEAT

C

HEAT

CLOCK

ECONOMIC

10:49

RUNNING

HEAT

C

°

AUTO

CLOCK

deactivated

10:49

TEMP

2i

SPEED

SWING and AIR DIRECTION Buttons

FAN

TEMP

20

SPEED

CLOCK

10:49

C

°

LOW

The oscillating function of the air discharge fins can be adjusted with
this button. The air distribution in the room is improved with the swing
function. In order to adjust the aim of the air discharge fins to a particular
direction, the AIR DIRECTION button must be pressed briefly. In order to
activate the automatic swing function, the AIR DIRECTION button must
be pressed for longer than 2 seconds.

deactivated

HEAT

▲ ▲

TEMP

2i

C

°

AUTO

SPEED

SWING

CLOCK

10:49

HEAT

TEMP

2i

C

°

AUTO

SPEED

SWING

CLOCK

10:49

11

REMKO RVD...DC

TIMER button TIMER ON / OFF

FAN

TEMP

20

SPEED

C

°

CLOCK

TIMER ON

TIMER OFF

LOW

10:49
18:45
22:30

The activation and switch-off time can be programmed with this but­ton. The timer is activated/deactivated by means of pressing the timer
on and the timer off button. The timer symbol ON TIMER or OFF TIMER
appears. The desired turn on or turn off time is set by pressing the TIME
ADJUST button. Pressing a TIME ADJUST arrow button serves to adjust
the time in 10 min. intervals. Pressing both TIME ADJUST arrow buttons
enables the time to be set more quickly.

When the programmed time has been reached, the device is automatical­ly turned on or off. If the indoor unit is automatically switched on, then
the mode, temperature and fan speed for the last setting is reactivated.

Pressing the OK button serves to store the selected TIMER setting.

The prior deletion of the on and off time can be achieved by pressing the
CANCEL button. The timer display on the indoor unit goes out.

TIMER ON button - activation delay

HEAT

TEMP

2i

°

SPEED

TIMER

CLOCK

10:49

C

ON

LOW

HEAT

CLOCK

TIMER ON

LOW

10:49

18:45

TIMER

ADJUST

TEMP

2i

C

°

SPEED

HEAT

TEMP

CLOCK

10:49

TIMER ON

06:30

2i

C

°

LOW

SPEED

Activation­delay

TIMER OFF button - switch-off delay

TEMP

2i

C

°

SPEED

CLOCK

TIMER ON

LOW

10:49

06:30

OFF

TIMER

HEAT

HEAT

TEMP

2i

C

°

SPEED

TIMER

CLOCK

10:49

ADJUST

TIMER ON TIMER ON

06:30 06:30

TIMER OFF TIMER OFF

12:30 17:30

LOW

HEAT

TEMP

CLOCK

10:49

2i

C

°

LOW

SPEED

Switch-off
delay

CLOCK button

TEMP

20

SPEED

C

°

CLOCK

TIMER ON

TIMER OFF

LOW

FAN

10:49
18:45
22:30

CANCEL - delete timer program

HEAT

TEMP

CLOCK

10:49

CANCEL

TIMER ON

06:30

2i

C

°

TIMER OFF

17:30

LOW

SPEED

HEAT

TEMP

CLOCK

10:49

2i

C

°

LOW

SPEED

The current time can be adjusted with this button. If the clock button is
pressed for longer than 3s, the time can be set with the TIME ADJUST
button. Store

HEAT

TEMP

CLOCK

i0:49

2i

C

°

SPEED

CLOCK

LOW

HEAT

TEMP

2i

C

°

SPEED

TIMER

CLOCK

i0:49

ADJUST

LOW

HEAT

TEMP

CLOCK

i5:50

2i

C

°

LOW

SPEED

OK

HEAT

TEMP

CLOCK

i5:50

2i

C

°

LOW

SPEED

Time
stored

12

Shutdown

Care and maintenance

Temporary shutdown

1. Allow the indoor unit to run for
2 to 3 hours in air circulation
mode or in cooling mode at the
maximum temperature setting
in order to remove any residual
moisture from the unit.

2. Shut down the unit using the
remote control.

3. Switch off the voltage supply to
the unit.

4. Cover the unit as far as pos­sible with plastic foil in order to
protect it from the influences of
weather.

Permanent
Shutdown

Ensure that equipment and com­ponents are disposed of in accord­ance with local regulations, e.g.
through authorised disposal
and recycling specialists or at col­lection points.

Contact REMKO GmbH & Co. KG
or your contract partner for a list
of specialist companies near you.

Regular care and maintenance
serves to ensure trouble-free op­eration and long service life of the
unit.

CAUTION

Prior to performing any work,
ensure the equipment is iso­lated from the voltage supply
and secured to prevent acci­dental switch-on!

NOTE

The statutory regulations
require an annual sealing test
for the refrigerant circuit in
relation to the refrigerant
filling level. The inspection
and documentation is to be
carried out by corresponding
specialist engineers.

Care

■

Ensure the indoor unit and out­door component are protected
against dirt, mould and other
deposits.

Type of task

Checks/Maintenance/Inspections

■

Clean the equipment using a
damp cloth. Do not use any
caustic, abrasive or solvent­based cleaning products. Do
not use a jet of water.

■

Clean the fins on the indoor
unit and outdoor component
prior to long shutdown periods.

Maintenance

■

It is recommended that
you take out a maintenance
contract with an annual service
from an appropriate specialist
firm.

TIP

This ensures the operational
reliability of your
equipment!

Commissioning

Monthly

Six-monthly

Yearly

General

Measure voltage and current
Check compressor/fans are functioning cor­rectly
Check fan is functioning correctly

Dirt on liquefier/vaporiser

Check refrigerant fill quantity

Check condensation drain

Test insulation

Check moving parts

Sealing test for refrigerant circuit

1) see note

• •

• •

• •

• •

• •

• •

• •

• •

• •

• •

1)

13

REMKO RVD...DC

Cleaning the cover
of the indoor unit

1. Disconnect the supply voltage
to the equipment.

2. Open and fold down the air
inlet guard on the cover. The
filter is held in place by the flaps
screwed in at the side of the
guard (Fig. 1).

3. Clean the guard using a soft,
damp cloth.

4. Switch the supply voltage back
on.

Air filter for indoor unit

Clean the air filter at intervals of
no more than 2 weeks.
Reduce this interval in case of
heavily soiled air.

5. Any dirt can be cleaned off us­ing lukewarm water and mild
cleaning agents.
To do so, turn the dirty side
downward (Fig. 3).

6. When using water, allow
the filter dry out properly in air
before replacing it in the unit.

7. Carefully insert the filter. Make
sure it is seated correctly.

8. Close the cover as described
above but in reverse order.

9. Switch the supply voltage back
on.

10.

Switch the unit back on.

Cleaning the
condensation pump

The indoor unit includes a built-in
condensation pump,
for pumping the condensation to a
drain at a higher level.

1 Guard on cover

2 Clean with a vacuum cleaner

3

Cleaning with lukewarm water

Cleaning the filter

1. Disconnect the supply voltage
to the equipment.

2. Open and fold down the air
inlet guard on the cover. The
filter is held in place by the flaps
screwed in at the side of the
guard (Fig. 1).

3. Tilt the filter and lift it out.

4. Clean the filter using a normal
vacuum cleaner (Fig. 2).
Turn the dirty side until it faces
up.

The pump is more or less main­tenance free. The condensation
pipes should be checked for dirt
at regular intervals. Clean them as
required.

If an external pump is also used,
observe the maintenance and care
instructions given in the separate
operating manual.

14

Troubleshooting and customer service

The equipment and components are manufactured using state-of-the-art production methods and tested several times
to verify their correct function. If malfunctions should occur, please check the functions as detailed in the list below.
Please inform your dealer if the unit is still not working correctly after all the functional checks have been performed!

Malfunction

Fault Possible cause Checks Remedial measures

The unit does not start
or switches itself off

The unit does not respond
to the remote control

The unit is running with
reduced or without
reduced cooling / heating
performance

Condensation discharge
on unit

Power outage, undervoltage,
defective mains fuse / main circuit
breaker switched off

Damaged mains cable

Waiting time after switch-on too
short

Temperature outside operating
range.

Overvoltages caused by thunder
storms

Fault in external condensation
pump

High-pressure / low-pressure
monitors have triggered

Transmission distance too far /
receiver affected by interference

Defective remote control

Receiver or transmitter unit ex­posed to excessive solar radiation

Electromagnetic fields are interfer­ing with transmission

Button in remote control jammed
/ two buttons pressed at same
time

Batteries in remote control are flat

Filter is unclean / air inlet / outlet
blocked by foreign items

Windows and doors open. Heat­ing/cooling output increases

Neither cooling nor heating mode
has been set

Fins on outdoor component
blocked by foreign items

Leaking refrigerant circuit

Outdoor component iced up

Drainage pipe on collection con­tainer clogged / damaged

Faulty external condensation
pump or float

Condensation has not drained
away and has collected in the
condensation line

Condensation does not drain off

Float is stuck or jammed due to
excessive dirt.

Are all other
electrical installations functioning
correctly?

Are all other
electrical installations functioning
correctly?

Have approx. 5 minutes
elapsed since the restart?

Are the fans in the indoor unit
and outdoor component working
correctly?

Has there recently been lightning?

Did the pump shut down due to
a fault?

Check refrigerant pressure and
look for leaks if necessary

Does the indoor unit beep when
pressing a button?

Is the unit running in manual
mode?

Does it function correctly in the
shade?

Does it function when switching off
possible sources of interference?

Does the “Send”
symbol appear on the display?

Have new batteries been inserted?
Is the display incomplete?

Have the filters been cleaned? Clean the filters

Have there been any construc­tional /
application-related
changes?

Does the cooling symbol appear
on the display?

Is the fan on the outdoor com­ponent running? Are the fins
unobstructed?

Are there signs of frost on the fins
of the indoor unit?

Check outdoor component. Has
the cassette sensor on the outdoor
component been correctly posi­tioned?

Can the condensation drain off
without any obstruction?

Is the collection tray full of water
and the pump not running?

Is there a steady fall on the con­densation pipe? Check there is no
blockage in the pipe.

Are the condensation lines un­blocked and is there a steady fall?
Are the condensation pump and
float switch functioning correctly?

Are the LEDs on the receiver unit
of the indoor unit flashing?

Check voltage
possible wait until turned on
again.

Repair by
a specialist

Schedule longer waiting
periods

Take into account the tempera­ture range for the indoor unit and
outdoor component

Switch off the mains breaker and
switch it back on. Have it checked
by a specialist

Check and if necessary clean the
pump

Rectify leakage and re-start

Reduce the distance to less than 6
m or change position

Replace the remote control

Place the receiver&transmitter unit
in the shade

Signal is not transmitted when in­terference sources are operational

Release the button / only press
one button

Insert new batteries

Close windows and doors / install
additional units

Correct the settings for the unit

Check the fan or winter controller,
reduce the air resistance

Repair by specialist

De-ice and fit the sensor at the
point where the most ice forms

Clean the drainage pipe and col­lection container

Call out a specialist to replace the
pump

Ensure there is a fall when laying
the condensation pipe and clean
the pipe.

The condensation line must have
a fall. If necessary, clean the pipe.
A faulty condensation pump and
float switch should be replaced.

Should be cleaned by specialist firm

15

REMKO RVD...DC

Problem display by blinker code

LED

Operation

flashes
rapidly

flashes

slowly

LED

Timer

flashes
rapidly

flashes
slowly

LED

Defrost

flashes
rapidly

flashes

slowly

LED

Alarm

flashes

slowly

flashes
rapidly

Display

outdoor

unit

E0 EEPROM error Check EEPROM

E2

E3

E4

E5 Overvoltage compressor Check compressor voltage

P0 Excessive temperature compressor Allow compressor to cool

P1 High pressure sensor has triggered Check refrigerant pressure

P2 Low pressure sensor has responded Check refrigerant pressure

P3

P4 Compressor discharge gas over 105°C

P5 Liquefier temperature over 65°C

P6

Cause Required action

Communication error between PCBs
outdoor unit & indoor unit
Communication error between out­door unit main board & outdoor unit
inverter board
Outdoor temp sensor on outdoor com­ponent tripped

Compressor power consumption too
high

Voltage protection main board outdoor
unit
Sensor air circulation / sensor liquefier
tripped
Communication error between outdoor
unit & indoor unit

Mode malfunction

Sensor liquefier / outdoor temp faulty
or not correctly connected

Condensate pump float switch faulty

Check electrical connection
leads

Check wiring

Check resistance and tem­perature on sensor

Check compressor power
consumption
Clean liquefier, check refrig­erant circuit
Clean liquefier, check refrig­erant circuit

Check voltage

Check resistance

Check electrical connection
leads

Switch system off

Read off error code on
outdoor unit
Check sensors
Check condensate pump
and float switch

Installation instructions for qualified personnel

Important points prior to in­stallation

■

Transport the unit in its original
packaging as close as possible
to the installation location to
avoid transport damage.

■

Check the contents of the

packaging for completeness
and check the unit for visible
transport damage. Report any
damage immediately to your
contracting party and the ship­ping company.

■

Lift the unit at the corners and
not by the refrigerant or con­densation connections.

16

■

The refrigerant pipes
(injection and suction pipe),
valves and connections must be
insulated impervious to vapour
diffusion. If necessary, also insu­late the condensation pipe.

■

Select an installation location
which allows air to freely flow
through the inlet and outlet.
(See section "Minimum clear­ances").

■

Do not install the unit in the
immediate vicinity of devices
with intensive thermal radia­tion. Installation near sources of
thermal radiation reduces the
output of the unit.

■

Open the blocking valves of the
refrigerant pipes only after the
installation is complete.

■

Seal off open refrigerant pipes
with suitable caps or adhesive
strips to avoid infiltration of
moisture
and never kink or compress the
refrigerant pipes.

■

Avoid unnecessary
bends. This minimises the pres­sure loss in the refrigerant pipes
and ensures that the compres­sor oil can flow back without
obstruction.

■

Make special preparations
regarding the oil return if the
outdoor component is located
above the indoor unit. (See sec­tion "Oil return flow measures").

■

Add refrigerant if the basic
length of the refrigerant pipe
exceeds 5 metres.
The quantity of additional refrig­erant is given in chapter "Add
refrigerant".

■

Only use the union nuts for the
refrigerant pipes included in
the delivery, and remove them
shortly before connecting the
refrigerant pipes.

■

Establish all electrical connections
in accordance with the relevant
DIN- and VDE standards.

■

See electrical connection diagram
Always properly insert electrical
cables into the electrical ter­minals. Otherwise a fire could
result.

Wall openings

■

A wall opening of at least 70
mm diameter and 10 mm slope
from the inside to the outside
must be made for each indoor
unit.

■

We recommend that the inside
of the hole is padded or lined,
e.g. using a PVC tube, to pre­vent the pipes being damaged.

■

After installation, the wall
opening should be closed off on
the building side with a suitable
sealant. Do not use materials
containing cement or lime!

Pipes and cables in wall breakthrough

Control line

PVC tube

Suction pipe

Condensation line

Injection pipe

Installation material

The indoor unit is fastened
using a wall bracket and 4 threaded
screws (provided by the customer).

The outdoor component is at­tached with 4 screws and a wall
bracket to the wall or fixed by a
floor bracket to the ground.

Selection of the installation
location

Interior unit

The indoor unit is designed for
horizontal wall installation above
doors. However, it can also be
used on the upper wall area
(min. 1.75 m from upper edge of
floor).

Exterior unit

The outdoor component is de­signed for horizontal base instal­lation in outdoor areas. It should
be placed on level, flat and firm
ground. The unit should also
be secured to prevent toppling.
The outdoor component can be
set up outside as well as inside a
building. For external installation,
please observe the following notes
to protect the unit from weather
conditions.

Rain

The unit should be at least 10 cm
off the ground when mounted on
the roof or ground. A floor bracket
is optionally available.

Sun

The liquefier on the outdoor unit
radiates heat.
Exposure to direct sunlight will
further increase the temperature of
the fins and reduce the heat out­put of the finned heat exchanger.
The outdoor unit should therefore
be installed as near as possible to
the north side of the building. If
necessary, take measures to pro­vide sufficient shade (responsibility
of customer). One possible solu­tion is to build a small roof. These
measures should not affect the
flow of warm outlet air.

Wind

If the unit is being installed in
windy areas, ensure that the warm
outlet air discharges in the main
wind direction. If this is not the
case it may be necessary to install
a windbreak (provided by the cus­tomer). Ensure that the windbreak
does not adversely affect the air
intake to the unit.

Windbreak

Wind

17

REMKO RVD...DC

■

Snow

The unit should be wall-mounted
in areas of heavy snowfall.

Installation should be at least 20
cm above the expected level of
snow to prevent snow from enter­ing the outdoor component. An
optional wall bracket is available as
an accessory.

Minimum clearance to snow

Comply with any regulations
and conditions affecting the
statics of the building. If neces­sary, fit acoustic installation.

5 Installation inside buildings

Warm air

Cold

Fresh air
Additional
fan

Snow

20 cm

Installation inside buildings

■

Ensure there is adequate heat
dissipation when placing the
outdoor component in cellars,
attics, adjoining rooms or halls
(Fig 5).

■

Install an additional fan with a
rated flow comparative to that
of the outdoor unit being in­stalled in the room. This is used
in conjunction with ventilation
ducts to compensate any pres­sure losses

(Figure 5).

Light
well

Warm air

Exterior unit

Light

well

Minimum clearances

Observe the minimum clearances to allow access for maintenance and
repair work and facilitate optimum air distribution.

Minimum clearances

1000

1000

Air intake

1000

D

1000

A

500

E

Air outlet

B

All values in mm

C

■

Ensure a continuous and unob­structed air flow from outside,
preferably using sufficiently
large air intakes placed opposite
each other

(Figure 5).

18

RVD 351DC AT RVD 521DC AT

A 150 mm

B 900 mm

C 500 mm

D 150 mm

E 500 mm

Oil return measures

If the outdoor component is
installed at a higher level than
the indoor unit, suitable oil return
measures must be taken. Usually
an oil pump bend is installed for
every 2.5 metres of height differ­ence.

Oil return measures

Exterior unit

Oil pump bend

in suction pipe to

outdoor unit

1 x every 5

metres of rising

pipe

Radius:
50 mm

max. 5/10 m

Interior unit

a second room or a fresh air
intake.

3. Fit the indoor unit onto the
threaded rods and use the
lower nuts to level the unit
(Fig. 9).This ensures that the
condensate drains into the col­lection tray.

4. Make sure that clearance A,
(Fig. 10) as specified in the ta­ble below, is provided between
the underside of the suspended
unit and the underside of the
fastening surface.

5. Connect the refrigerant pipes,
electrical cables and condensa­tion line to the indoor unit as
described below.

6. Check that the unit is level.

7. The final task is to tighten the
counternuts and attach the
cover.

8 Mounting the unit

400

All dimensions in mm

Dimensions in mm

RVD 351-

521DC

Distance A 35 mm

Distance B 25 mm

Mounting the unit

620 mm

x400- mm

620

Installation

NOTE

Installation should only be
performed by authorised spe­cialists.

Unit installation

The indoor unit is mounted face
down on four threaded rods. Take
into account the ceiling grid and
any other installations.

1. Use the dimensions of the ceil­ing cassette (Fig. 8) to mark the
fixing points for the threaded
rods on structural parts ap­proved to support the static
load above the suspended ceil­ing.

2. Fit any connection nozzles
before installing the unit if con­nections to a second room or a
fresh air intake are required.
See section - Connections to

9 Hooking in the unit

Structural component

10 Fastening the unit

Structural component

A

B

19

REMKO RVD...DC

Connection of
refrigerant pipes

The on-site connection of the
refrigerant pipes is made at the
rear of the unit.

It may be necessary to fit a reducer
or flared adapter to the indoor
unit. These fittings are included
as standard with the indoor unit.
Once installed, the connections
should be made tight against va­pour diffusion.

CAUTION

The units are factory filled with
dry nitrogen to check for leaks.
The pressurised nitrogen is
released when loosening the
union nuts.

The following instructions describe
the installation of the refriger­ant circuit and the assembly of
the indoor unit and the outdoor
component.

5. Verify that the shape of the
flange is correct(Figure 8).

6. First connect and hand-tighten
the refrigerant connections
to ensure they are correctly
seated.

7. Now fully tighten the fittings
using 2 suitably sized open­ended spanners. Use one span­ner to counter the force when
tightening the fitting (Figure

9).

8. Use insulation hoses which are
designed for this temperature
range and diffusion tight.

9. Lay the refrigerant pipes from
the indoor unit to the outdoor
component. In doing so, ensure

6 Deburring the refrigerant pipe

Refrigerant pipe

that they are sufficiently at-

tached and take measures for
the oil return, if necessary!

10.

Observe the permitted bend­ing radius for the refrigerant
pipes during installation. Never
bend a pipe twice in the same
place. Brittle pipes and potential
cracking are the consequences.

NOTE

Only employ tools and com­ponents suitable for refrigera­tion applications.

11.

Use the wall or floor brackets
to fit the outdoor component
against structural parts ap­proved to support the static
load (refer to the installation
instructions for the brackets).

7 Flanging the refrigerant pipe

Flanging tool

1.

The required pipe diameters are

given in the table "Technical
data".

2. Remove the factory-fitted pro­tective caps and union nuts on
the connections. These should
be used during installation.

3. Before flanging the refrigerant
pipes, ensure that the union nut
is fitted on the pipe.

4. Prepare the laid refrigerant
pipes as shown below

(Fig. 6+7).

Deburrer

8 Correct flange shape

9 Tighten the fitting

Tighten 1. spanner

Counter

2. spanner

Tightening
torque:

“

15-20 Nm

“

33-40 Nm

“

50-60 Nm

“

65-75 Nm

“

95-105 Nm

20

Tightness check

Condensate drain

Once all the connections have
been established, the pressure
gauge station is attached as fol­lows to the Schrader valve (if
fitted):
red = small valve
= injection pressure
blue = large valve
= suction pressure

Once connected, perform a tight­ness test using dried nitrogen.

The tightness test involves spray­ing a leak detection spray onto
the connections. If bubbles are
visible, the connections have not
been properly made. Re-tighten
the connection or prepare a new
flange.

If the tightness test is success­fully completed, depressurise
the refrigerant pipes and start a
vacuum pump with an absolute
final partial pressure of min. 10
mbar to remove the air in the pipe.
Any humidity present in the pipes
is also removed.

CAUTION

A vacuum of min. 20 mbar
must be created!

If the temperature falls below the
dew point, condensation will form
on the cooling fins during cooling
mode.
A collection tray together with
a condensation pump and float
switch are fitted as standard below
the cooling fins. Should the float
switch trip a protective shutdown
due to inadequate removal of
the condensation, the pump will
switch on immediately and run on
for approx. three minutes.

■

The condensation pipe should
have a fall of min. 2 %. This is
the responsibility of the cus­tomer. If necessary, fit vapour
diffusion proof insulation.

■

If the level of the condensation
pipe on the unit is above that
of the outlet, route the pipe
vertically upwards (max. 1000
mm from the lower edge of the
unit) and then with a fall to the
drain.

■

The condensation line from the
unit should run freely into the
drainage pipe. If the condensa­tion runs directly into a sewer
pipe, fit a trap to prevent any
unpleasant odours.

Condensation connection - Wrong!

Riser pipe too far away

No fall

Condensation pipe too large/small

Cannot freely drain away

Condensation connection - Correct!

min. 2% fall

12-20 mm

A

The time required to generate the
vacuum is dependent on the pipe­work volume of the indoor unit
and the length of the refrigerant
pipes. This always takes at least
60 minutes.
Once any foreign gases and
humidity have been completely
extracted from the system, the
valves on the pressure gauge sta­tion are closed and the valves on
the outdoor unit are opened as
described in the chapter on "Com­missioning".

■

When operating the unit at
outdoor temperatures below 4,
ensure the condensation pipe is
laid to protect it against frost.
If necessary, fit supplementary
pipe heating.

■

Once the pipe has been laid,
check the condensation drains
off and permanently seal it.

max. 100 mm

RVD 351 IT RVD 521 IT

A 500 mm 750 mm

21

REMKO RVD...DC

Electrical connection

A protected mains supply cable
and control cable should be con­nected to the outdoor component
RVD 351-521DC and indoor unit
respectively.

NOTE

We recommend realising the
control lines with shielded
cable.

CAUTION

All electrical installation work
should be performed by spe­cialist contractors. Isolate the
voltage supply when connect­ing the electrical terminals.

■

We recommend that custom­ers install a main/repair switch
in the vicinity of the outdoor
component.

■

The terminal blocks for making
the connections are located at
the rear of the unit. When the
unit is installed, measurements
can be made from the front by
removing the cover.

■

If an optional condensation
pump is used in conjunction
with the unit, it may be neces­sary to install an additional relay
with a higher contact rating
after the switch-off contact
on the pump to switch off the
compressor.

■

Control cables should be
screened if laid in areas exposed
to strong magnetic fields.

Connecting the indoor unit

Make the connection as follows:

1. Open the air intake grill.

2. Unfasten the cover on the right
side and at the bottom right
rear side.
(Fig. 12).

3. Connect the unit to the control
cable on the outdoor compo­nent. See electrical connection
diagram.

4. Re-assemble the unit.

12

Connecting the indoor unit

Control line
from the out­door unit

Terminal block
Control line

Cover

Connecting the outdoor com­ponent

Proceed as follows to connect the
cable:

1. Remove the cover from the
unit.

according to the relevant stand­ards.

4. Feed both cables through the
edge protection rings on the
fixed connection panel.

5. Terminate the cables as shown
on the electrical connection
diagram.

6. Support the cable in the strain
relief and re-assemble the unit.

Before
Commissioning

After the tightness check has been
successfully completed,
connect the vacuum pump via the
pressure gauge station to the valve
connections on the outdoor unit
(see chapter "Tightness check")
and create a vacuum.

Perform the following checks prior
to commissioning the unit for the
first time and after any interven­tions affecting the refrigerant
circuit. Record the results in the
commissioning report:

■

Check of all refrigerant
pipes and valves with
leak detection spray or soapy
water for leaks and for inad­vertent mix up of suction and
injection pipe, with the unit at a
standstill.

■

Check of all refrigerant
pipes and insulation for dam­age.

■

Check of all electrical
connections between
indoor unit and outdoor unit
for correct polarity.

■

Details concerning the electrical
protection
of the system are given in the
section on technical data.

22

2. Remove the side panel next to
the terminals.

3. Select the cable cross-section

■

Check that all fastenings,
mountings etc.
are firm and at the correct level.

Add refrigerant

The equipment contains a basic
quantity of refrigerant. Beyond
these conditions, for refrigerant
pipe lengths of more than 5 meters
per circuit, an additional amount of
refrigerant must be added, accord­ing to the following chart:

CAUTION

Note that the employed refrig­erant is always filled in liquid
form!

NOTE

Check the overheating to
determine the refrigerant fill
quantity

CAUTION

Wear protective clothing when
handling refrigerant.

RVD 351DC RVD 521DC

Up to and
incl. 5m

5m to
max. 15m

5m to
max. 20m

0 g/m

25

g/m

- 25 g/m

-

Commissioning

NOTE

Commissioning should only be
performed and documented by
specially trained personnel.

The system can be commissioned
once all the components have
been connected and tested. A
functional check should be per­formed to verify its correct func­tion and identify any unusual

operational behaviour prior to
handing it over to the operator.

NOTE

Check that the stop valves and
valve caps are tight after carrying
out any work on the refrigerant
circuit. If necessary, use appropri­ate sealant products.

Function test and
test run

Check the following points:

■

Leak tightness of refrigerant
pipes.

■

Compressor and fan running
smoothly.

■

In cooling mode, cold air should
be output by the indoor unit,
and warm air should be output
by the outdoor component.

■

Functional test of the indoor
unit and all program
sequences.

■

Check of the surface tempera­ture of the suction pipe and
determination of vaporiser
overheating. To measure the
temperature, hold the ther­mometer to the suction pipe
and subtract the boiling point
temperature reading on the
pressure gauge from the meas­ured temperature.

■

Record the measured tem­peratures in the commissioning
report.

Functional test for cooling
and heating modes

1. Remove the caps
from the valves.

2. Begin the commissioning
process by briefly opening the
blocking valves of the external
section until the manometer
displays a pressure of approx. 2
bar.

3. Use leak detection spray or suit­able devices to check that all
the connections are tight.

4. If no leaks are found, fully open
the stop valves by turning them
anti-clockwise using a spanner.
If leaks are found, repair the
faulty connection. It is impera­tive that the vacuum creation
and drying steps are repeated.

5. Switch off the main circuit
breaker or remove the fuse
(provided by the customer).

6 Press the test knob on the

outdoor unit and wait until
a frequency of min. 50 Hz is
established (only RVD521).

6. Use the remote control to
switch on the unit and select
the cooling mode, maximum
fan speed and lowest target
temperature.

7. Check the overheating, out­door, indoor, outlet and vapori­sation temperatures and record
the measured values in the
commissioning report. Check
the correct function and set­tings of all regulation, control
and safety devices.

8. Check the indoor unit control
system using the functions
described in the chapter "Oper­ation". Timer, temperature set­ting, fan speeds and switching
to ventilation or dehumidifying
mode.

9. Check the correct function
of the condensation pipe by
pouring distilled water into the
condensation tray.
A bottle with a spout is recom­mended for pouring the water
into the condensation tray.

10.

Switch the indoor unit to heat­ing mode.

23

REMKO RVD...DC

1.

Check all the previously
described safety devices and
functions during the test run.

12.

Enter the measured data in
the commissioning report.
in the commissioning report
and familiarize the operator
with the system.

13.

Remove the pressure gauge.
Check that seals have been
fitted in the sealing caps.

NOTE

Press the TEST knob on the
outdoor unit board. This
serves to set the inverter to
max. refrigerating capacity.

14. Reinstall all parts which were
removed.

Functional test and
test run for RVD 521 DC

During operation of the plant
operating parameters can be called
up on the outdoor unit display.
The following parameters are dis­played successively:

RVD 521 DC

- Frequency of the compressor

- Operating mode

- Level fan

- Current cooling/heating perforance

- Temperature sensor liquefier

- Temperature sensor hot gas

- Temperature sensor air inlet

- Power consumption outdoor unit

- Degree of opening for electronic
Expansion valve only RVD 521 DC

- error code

Proceed as follows to call up the
operating parameters:

1. Remove the cover from the
outdoor unit.

2. Switch all indoor units on and
select cooling mode and the
highest fan speed.

Display RVD 521 DC

The display on the outdoor unit
PCB can call up the operating pa­rameters of the plant in the above
order. In order to do so, press the
check button located next to the
display on the AT board.

Check button

Frequency gauge

Display Frequency (Hz)

30 30

-- Stand by

60 60

Operating mode

Display Mode AT

0 Off
2 Cooling mode
3 Heating mode
4 Forced cooling

Operating mode fan

Display Mode fan

0 Off
1 Low rotational speed
2 High rotational speed

Cooling - heating output AT / IT

Display Cooling output

1 2.0-2.5 kW
2 2.5-3.0 kW
3 3.0-3.8 kW
4 3.8-5.0 kW
5 5.0-5.5 kW
6 5.5-6.1 kW

Temperature sensor liquefier

Display Temperature

10 35-40 ℃
11 40-45 °C
12 45-50 ℃
13 50-55 °C
14 55-60 ℃
15 60-65 °C
16 65-70 ℃

Temperature sensor hot gas

Display Temperature

10 35-40 ℃
11 40-45 °C
12 45-50 ℃
13 50-55 °C
14 55-60 ℃
15 60-65 °C
16 65-70 ℃

Temperature sensor air inlet

Display Temperature

15 -7.5 ℃
20 -5.0°C
25 -2.5℃
30 0°C
35 2.5℃
40 5.0°C
45 7.5℃
50 10.0°C
55 12.5℃
60 15.0°C
65 17.5°C
70 20.0°C
75 22.5°C
80 25.0°C
85 27.5°C
90 30.0°C
95 32.5°C
99 34.5°C

Power consumption outdoor unit

Display

44 6.0 A
46 6.2 A
54 7.4 A
55 7.6 A
58 7.8 A
62 8.0 A
66 8.6 A
67 8.8 A
68 9.0 A
70 9.2 A
72 9.5 A
76 10.0 A
78 10.2 A
80 10.4 A
82 10.6 A
84 11.0 A
88 11.6 A
92 12.0 A
94 12.2 A

Power consump-

tion

24

Electrical connection diagram

GM

P1

Lila

Weiß

Netzzuleitung Innenteil

Rot

Weiß

CN4

CN11 CN5 CN7 CN9

Weiß

C5

Weiß Schwarz

Rot

CN3

CN2

T1 T2

T2 T1

CN14 CN10 CN15

(E)

Y

X

Schwarz

Grau

Gelb

Schwarz

Blau

Weiß

(E)

P

C

YEX

E

F M

CN12

CN1

zum Außengerät
Steuerleiter

zum CCN
Steuerleiter

DM

Display

Y/G

c

Blau

Y/G

CN5

GM

P1

Lila

Weiß

Netzzuleitung Innenteil

Rot

Weiß

CN4

CN11 CN5 CN7 CN9

Weiß

C5

Weiß Schwarz

Rot

CN3

CN2

T1 T2

T2 T1

CN14 CN10 CN15

(E)

Y

X

Schwarz

Grau

Gelb

Schwarz

Blau

Weiß

(E)

P

C

YEX

E

F M

CN12

CN1

zum Außengerät
Steuerleiter

zum CCN
Steuerleiter

DM

Display

Y/G

c

Blau

Y/G

CN5

RVD 351-521

Interior unit

L

N

P

Control conductor

Q

Control conductor

E

Control conductor

PE PE

Electrical circuit diagram

RVD 351 DC IT

Exterior unit

Phase conductor

L

N

Neutral conductor

P

Q

E

Earth conductor

Mains cable

L

N

PE

230 V~,
50 Hz,
L / N / PE

RVD 521 DC IT

Q

E

Q

EPP

25

Blau

Blau

Blau

Blau

Blau

Blau

Blau

Kompressor

Rot

Schwarz

Gelb

Gelb

Schwarz

Rot

Weiß

Rot

RotRot

Schwarz

Gelb

Grau

Filter

Schwarz

Rot

Rot

Schwarz

Schwarz

Yellow/Green

Yellow/Green

Yellow/Green

Schwarz

Rot

Schwarz

Braun

Braun

Weiß

Weiß
Weiß

Weiß

Rot

Rot

Rot

Rot

Rot

Orange

Rot

Schwarz

UWV

U

V

W

P

N

IPM

10PIN

W V

U

L202

IPM

EEW

T5

CN4

CN12

CN5CN5

CN16

CN11

CN1

CN2

Trans. Trans.

CN20

CN27

CN28

CN9

Hochdruckschalter

Niedrigdruckschalter

R2503

P-3

P-4

P-5

P-6

P-2

3

CN3

R1815B

R1325C

CN14

CN15

CN13

CN12

CN7

CN5

CN6

CN4

CN8

CN10

CN9

Blau

Ventilator

CN1 CN2

L

N

L

N

P-1

L

H

Sensor Heißgas

Sensor Außentemperatur

Sensor Austritt
Verflüssiger

Elektronisches
Expansionsventil

Leistungsplatine

zum Innengerät

Steuerleiter

Hauptplatine

Steckverbinder

Steckverbinder

A

U

V

W

Y/G

U

V

W

RY3

4

CN6

CN7

CN5

CN4

CN2 8

CN26

C

N

1

0

N

-

B

B

C

N

3

C

N

2

C

N

1

CN15

CN14

CN16

N-A

Zum Innengerät

Y/G

WHITE

REACTOR2 R6025C
REACTOR1 R1310K

Kurbelwannenhei z ung

Heizung

5

CN31

CN33

CN34

CN32

B

L

A

C

K

Y/G

T3

Sensor Umgebung

T5

Sensor Verflüssiger Sensor Heißgas

Sensor Öl

Kompressor

Ventilatormotor

Umkehrventil

Blau

Schwarz

Rot

Schwarz

Rot

Rot

Hauptplatine

Grau

Optional

Orange

Gelb

Rot

Orange

Gelb

Gelb

Orange

Rot

Blau

Stromüberwachung

Gelb

Blau

Braun

REMKO RVD...DC

RVD 351 DC AT

RVD 521 DC AT

26

Unit dimensions

RVD 351-521 DC IT

650

RVD 351-521 DC AT

650

400

580

610

28

A

We reserve the right to modify the dimensions and constructional design as part of the ongoing technical development process.

B

E

C

D

RVD 351 DC RVD 521 DC

A 760 840

B 270 310
C 590 700
D 530 560

E 290 335

All values in mm

27

REMKO RVD...DC

Device illustration RVD 351DC IT to RVD 521DC IT

5

1

2

14

6

3

9

8

10

7

the dimensions and constructional design as part of the ongoing

11

12

13

We reserve the right to modify

technical development process.

Spare parts list

No. Designation RVD 351DC IT RVD 521DC IT

1 Air inlet guard 1110950 1110950
2 air filter 1110951 1110951
3 Cover 1110952 1110952
4 Fin motor 1110953 1110953
5 Air inlet, condensate pan module 1110954 1110954
6 Outlet fins, set of 4 1110955 1110956
7 Vaporiser 1110957 1110958
8 Condensation pump cpl. 1110959 1110959

9 Fan wheel 1110960 1110961
10 Vaporiser fan motor 1110962 1110963
11 Control PCB 1110964 1110965
12 Transformer 1110966 1110966
13 Condenser, vaporiser fan 1110967 1110968
14 IR remote control 1110969 1110969

Spare parts (not illustrated)

Condensation float switch 1110970 1110970
Display board 1110971 1110971
Air circulation sensor 1110972 1110972
Vaporiser sensor 1110973 1110973

When ordering spare parts, please state the computerised part no., unit number and type (see identification plate)!

28

Device illustration RVD 351-521 DC / AT

5

6

4

8

9

3

2

12

10

1

11

7

We reserve the right to modify the dimensions and constructional design as part of the ongoing technical development process.

Spare parts list

No. Designation RVD 351DC AT RVD 521DC AT

1 Front panel

2 Fan blade, liquefier

3 Fan motor, liquefier

4 Liquefier

5 Cover panel

6 Side part

7 Compressor, cpl.

8 Stop valve, suction pipe

9 Stop valve, injection pipe

10 Reverse flow valve

11 Control PCB

12 Condenser, compressor

Spare parts (not illustrated)

E-Box, complete

Electronic expansion valve

PCB with display

Temperature sensors, set

1110990 1110991

1110992 1110993

1110994 1110995

1110996 1110997

1110998 1110999

1111000 1111001

1111002 1111003

1111004 1111005

1111006 1111007

1111008 1111009

1111010 1111011

1111012 1111013

1111014 1111015

--- 1111016

1111017 1111018

1111019 1111020

When ordering spare parts, please state the computerised part no. and unit number (see identification plate) !

29

REMKO RVD...DC

Technical data

Range RVD 351DC RVD 521DC

Operational mode

Nominal cooling output

Nominal heating output

Energy efficiency class, cooling

Energy efficiency ratio EER

Energy efficiency class, heating

Coefficient of performance COP

1)

2)

1)

1)

2)

2)

kW

kW

3.52 (1.41 to 4.11) 5.27 (1.59 to 5.65)

4.29 (1.43 to 4.83) 5.86 (1.45 to 6.15)

Power consumption, annual, (500h) C/H 410 / 560 810 / 770

Operating range (room volume), approx. m³ 110 160

Coolant 410A

Power supply V / Hz 230/1~/50 Hz

Nom. electrical power consumption, cooling

Nom. electrical power consumption, heating

1)

2)

kW

kW

1,06 (0,41-1,45) 1,62(0,56-2,63)

1,19 (0,38-1,88) 1,54 (0,72-2,65)

Electr. rated power consumption kW

Electr. nominal power consumption cooling

Electr. nominal power consumption heating

1)

2)

A

A

4,34 (2,02-12,24) 7,08 (2,43-12,35)

6,64(2,06-12,03) 6,82 (3,13-12,32)

Electr. starting current, max. A 12,0 12,0

Coolant connection - injection line Inches (mm) 1/4 (6,35) 1/4 (6,35)

Coolant connection - suction line Inches (mm) 1/2 (12,70) 1/2 (12,70)

Max. operating pressure kPa

Corresponding indoor unit

RVD 351DC IT RVD 521DC IT

Adjustment range, room temperature °C +17-+30

Operating range °C +17-+31

Air flow volume per speed setting m³/h 510/530/680 560/710/800

Sound pressure level per speed setting

3)

dB(A) 33/37/40 37/40/42

Protection degree IP X0

Condensate drain mm 25

Condensate pump, flow rate, max. mmWS 500 750

Dimensions - height mm 255

Width mm 580

Depth mm 580

Dimensions Cover length / width mm 650 / 650

Weight kg

Corresponding outdoor component

RVD 351DC AT RVD 521DC AT

Operating range - cooling °C +5 - +43 +5 - +43
Operating range - heating °C -5 - +24 -5 - +24
Air flow rate, max. m³/h 2400
Protection degree IP 24
Noise output max.

3)

dB(A) 48 52
Refrigerant, basic quantity kg 1,40 1,70
Refrigerant, additional quantity > 5 m g/m 30 30

Refrigerant pipe, max. length m 15 20
Refrigerant pipe, height indoor unit and out-

door unit max.

m 10 10

Dimensions - height mm 590 700

Width mm 760 845

Depth mm 280 310
Weight kg 41,0 63,0
Serial number 548... 549...
EDP no. 1623160 1623170

1) Air intake temp. TK 27°C / FK 19°C, outdoor temp. TK 35°C / FK 24°C, max. air volume, 5m pipe length in combination with MVT 900 / 950 DC

2) Air intake temperature TK 20°C outdoor temperature TK 7°C, FK 6°C, max. air volume, 5m pipe length in combination with MVT 900 / 950 DC

3) Gap 1 m free space 4) Contains greenhouse gas according to Kyoto protocol

30

Cooling / heating

A A

3,32 3,25

A A

3,61 3,80

4)

1,90 2,60

4200

21,0

Notes

31

REMKO INTERNATIONAL

… and also right in your neighbourhood!
Make use of our experience and advice

REMKO GmbH & Co. KG

Air conditioning and heating technology

Im Seelenkamp 12 · 32791 Lage

PO Box 1827 · 32777 Lage

Tel. [phone]

Fax [phone]

E-mail [e-mail]

Website www.remko.de

Hotline

Air conditioning and heating technology

[phone]

Export

[phone]

Advice

We keep the specialist knowl-

edge of our advisers continu-

ously up-to-date with intensive

training. This has earned us a

reputation as more than just a

good, reliable supplier:

REMKO, a partner

who is here to help solve prob-

lems.

Distribution

REMKO provides not only a

well-developed distribution

network in Germany and abroad,

but also unusually highly skilled

professionals in distribution.

REMKO staff in the field are

more than mere salespeople:

they must primarily act as

advisers in air conditioning and

heating technology for our

customers.

Customer Service

Our units work precisely and

dependably. Should a failure

occur, however, REMKO cus-

tomer service will rapidly be at

your side. Our comprehensive

network of experienced dealers

guarantees quick and

reliable service.

Subject to technical modifications, no responsibility taken for the correctness of information!