Carefully read the operating manual before commissioning the units or their components for the first time. It provides useful tips and notes such as hazard warnings to prevent injury and material damage. Failure to follow the directions in this manual can endanger persons, the environment and the equipment itself or its components and will void any claims for liability.

Store this manual and the information required for the operation of this system (e.g. refrigerant datasheet) in the vicinity of the unit.

The refrigerant used in the system is flammable. If applicable, observe the local safety conditions.

DANGER!

This combination of symbol and signal word warns of a situation in which there is immediate danger, which if not avoided may be fatal or cause serious injury.

WARNING!

This combination of symbol and signal word warns of a potentially hazardous situation, which if not avoided may be fatal or cause serious injury.

CAUTION!

This combination of symbol and signal word warns of a potentially hazardous situation, which if not avoided may cause injury or material and environmental damage.

Warning of inflammable substances!

1.2 Identification of notes

This section provides an overview of all important safety aspects for proper protection of people and safe and fault-free operation.The instructions and safety notes contained within this manual must be observed in order to prevent accidents, personal injury and material damage.

Notes attached directly to the units must be observed in their entirety and be kept in a fully legible condition.

Safety notes in this manual are indicated by symbols. Safety notes are introduced with signal words which help to highlight the magnitude of the danger in question.

DANGER!

Contact with live parts poses an immediate danger of death due to electric shock. Damage to the insulation or individual components may pose a danger of death.

NOTICE!

This combination of symbol and signal word warns of a potentially hazardous situation, which if not avoided may cause material and environmental damage.

This symbol highlights useful tips and recommendations as well as information for efficient and fault-free operation.

1.3 Personnel qualifications

Personnel responsible for commissioning, operation, maintenance, inspection and installation must be able to demonstrate that they hold a qualification which proves their ability to undertake the work.

1.4 Dangers of failure to observe the safety notes

Failure to observe the safety notes may pose a risk to people, the environment and the units. Failure to observe the safety notes may void any claims for damages.

REMKO RWT series

In particular, failure to observe the safety notes may pose the following risks: n The failure of important unit functions.

n The failure of prescribed methods of maintenance and repair.

n Danger to people on account of electrical and mechanical effects.

1.5 Safety-conscious working

The safety notes contained in this manual, the existing national regulations concerning accident prevention as well as any internal company working, operating and safety regulations must be observed.

1.6 Safety instructions for the operator

The operational safety of the units and components is only assured providing they are used as intended and in a fully assembled state.

n The units and components may only be set up, installed and maintained by qualified personnel.

n Protective covers (grills) over moving parts must not be removed from units that are in operation.

n Do not operate units or components with obvious defects or signs of damage.

n Contact with equipment parts or components can lead to burns or injury.

n The units and components must not be exposed to any mechanical load, extreme levels of humidity or extreme temperatures.

n Rooms in which refrigerant may escape shall be adequately aerated and ventilated. Otherwise, a risk of suffocation or fire exists.

n Do not leave children unsupervised when close to the system.

n Commissioning must be performed by authorised specialists exclusively. Deficient commissioning may lead to water leaks, electric shocks or fire. Commissioning must take place as described in the user manual.

n Only instruct authorised specialist personnel to perform maintenance or servicing.

n The system is filled with a flammable refrigerant. Never thaw any frozen unit components independently!

n Do not operate any further devices that produce high heat or naked flames in the same room.

n All housing parts and unit openings, e.g. air inlets and outlets, must be kept clear.

n The units must be inspected by a service technician to ensure that they are safe to use and fully functional at least once yearly. Visual inspections and cleaning may be performed by the operator when the units are disconnected from the mains.

1.7 Safety notes for installation, maintenance and inspection

n The refrigerant R32 used in the system is flammable. If applicable, observe the local safety conditions.

n Keep the cooling circuit clear of other gases and foreign substances. Only fill the cooling circuit with the refrigerant R32.

n Only use the accessories, components and appropriately marked parts provided. The use of non-standardised components may result in water leaks, electric shocks and fire.

n Only install and store the units in rooms larger than 4 m 2 . With a failure to comply, leaks may result in the room filling with a flammable mixture!

The minimum room size of 4 m 2 required for installation and storage pertains to the basic fill quantity of the unit. This varies according to the installation type and total fill quantity of the system. The calculation must take place in accordance with valid DIN standards. Make sure that the installation site is suitable for safe unit operation.

n Only mount the unit components on structurally suitable brickwork.

n The units must not be installed in rooms in which further devices that produce heat are operated (heaters, open hearths).

n Make sure the installation room is sufficiently ventilated.

n Interventions in the cooling circuit are only possible after completely draining the refrigerant.

Never solder or grind unit components!

n Note that refrigerant may be odourless.

n Never operate the air conditioning unit in a humid room, such as a bathroom or laundry room. If the humidity is too high, this can cause short circuits on electrical parts.

n The product must be correctly earthed at all times, otherwise it may induce electric shocks.

n Attach the condensate drain as described in the operating manual. The inadequate drainage of condensate can lead to water damage in your apartment.

n All persons who intervene in the cooling circuit must hold a valid certificate from the chamber of industry and commerce, which confirms their ability to work with refrigerant.

n Appropriate hazard prevention measures must be taken to prevent risks to people when performing installation, repair, maintenance or cleaning work on the units.

n The setup, connection and operation of the units and its components must be undertaken in accordance with the usage and operating conditions stipulated in this manual and comply with all applicable regional regulations.

n Regional regulations and laws as well as the

Water Ecology Act must be observed.

n The power supply should be adapted to the requirements of the units.

n Units may only be mounted at the points provided for this purpose at the factory. The units may only be secured or mounted on stable structures, walls or floors.

n The units and components should not be operated in areas where there is a heightened risk of damage. Observe the minimum clearances.

n The units and components must be kept at an adequate distance from flammable, explosive, combustible, abrasive and dirty areas or atmospheres.

n Safety devices may not be modified or bypassed.

n The connection of the indoor unit must be established as a permanent connection; a detachable, reusable connection is not permissible.

1.8 Unauthorised modification and changes

Modifications or changes to units and components are not permitted and may cause malfunctions.

Safety devices may not be modified or bypassed.

Original replacement parts and accessories authorised by the manufactured ensure safety. The use of other parts may invalidate liability for resulting consequences.

1.9 Intended use

Depending on the model, the units and the additional fittings with which they are equipped are only intended to be used as an air-conditioner for the purpose of cooling or heating the air in an enclosed space.

Any different or additional use is a non-intended use. The manufacturer/supplier assumes no liability for damages arising from a non-intended use.

The user bears the sole risk in such cases.

Intended use also includes working in accordance with the operating and installation instructions and complying with the maintenance requirements.

The threshold values specified in the technical data must not be exceeded.

1.10 Warranty

For warranty claims to be considered, it is essential that the ordering party or its representative complete and return the "certificate of warranty" to

REMKO GmbH & Co. KG at the time when the units are purchased and commissioned.

The warranty conditions are detailed in the "General business and delivery conditions". Furthermore, only the parties to a contract can conclude special agreements beyond these conditions. In this case, contact your contractual partner in the first instance.

1.11 Transport and packaging

The devices are supplied in a sturdy shipping container. Please check the equipment immediately upon delivery and note any damage or missing parts on the delivery and inform the shipper and your contractual partner. For later complaints can not be guaranteed.

WARNING!

Plastic films and bags etc. are dangerous toys for children!

Why:

- Leave packaging material are not around.

- Packaging material may not be accessible to children!

REMKO RWT series

1.12 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 equipment and components

Only recyclable materials are used in the manufacture of the devices and components. Help protect the environment by ensuring that the devices 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. using certified firms and recycling specialists or at collection points.

2 Technical data

2.1 Unit data

Series

Operating mode

Nominal cooling output 1)

Energy efficiency ratio SEER 1)

Rated power consumption, electrical cooling 1)

Rated elec. curr. consump., cooling 1)

Power consumption, annual, Q

Energy efficiency ratio, cooling 1)

Nominal heat capacity 2)

Energy efficiency ratio SCOP 4)

Rated power consumption, electrical heating 2)

Rated elec. curr. consump., heating 2)

Power consumption, annual, Q

Energy efficiency ratio, heating 2)

Max. power consumption

Max. current consumption

EDP no.

kW kW

A kWh kW kW

A kWh kW

RWT 355 DC RWT 525 DC

Inverter wall chest room air conditioner combination for cooling and heating

3.5

(0.8-4.2)

7.3

5.0

(2.6-5.6)

6.7

1.0

1.5

4.5

168

3.8 (0.4-4.7)

5.5

1.0

4.43

910

A+++

1.35

5.95

1623420

A++

6.7

261

5.3 (2.2-6.3)

5.0

1.4

6.40

1414

A++

1.95

8.5

1623425

1) Air inlet temp. TK 27 °C/FK 19 °C, outside temperature TK 35 °C, FK 24 °C, max. air flow volume,

5 m pipe length

2) Air inlet temp. TK 20 °C, outside temperature TK 7 °C, FK 6 °C, max. air flow volume, 5 m pipe length

3) The specified value is based on results from standard testing.

The actual consumption depends on the use and location of the unit

4) The specified value is based on the average heating period

REMKO RWT series

Associated indoor unit / series

Power supply

Application area (room volume), approx.

Adjustment range, room temperature

Relative air humidity adjustment range

Operating range

Air flow volume per stage

Sound pressure level per stage 5)

Enclosure class

Refrigerant connection, liquid pipe

Refrigerant connection, suction pipe

Condensate drainage connection

Dimensions: Height / width / depth

Weight

EDP no.

V/Ph/Hz m 3

°C

°C/r.H.% m 3 /h dB (A)

Inches

(mm)

Inches

(mm) mm mm kg

RWT 355 DC IT

490/580/650

27/34/37

1/4 (6.35)

1623422

5) At distance of 1 m in the open air; specified values are maximum values

110

230/1~/50

+17 to +30

+35 to +85

+16 to +30 / 35-65

160

IPX0

621/793/200

14.9

RWT 525 DC IT

600/690/780

32/38/41

3/8 (9.52)

1/2 (12.7)

1623427

Associated outdoor unit / series

Power supply

Operating range, cooling

Operating range, heating

Air flow rate, max.

Enclosure class

Sound power level max.

Sound pressure level 5)

Refrigerant 6)

Refrigerant, basic quantity

equivalent

Operating pressure, max.

Refrigerant, additional quantity >5m

Refrigerant piping, max. length

Refrigerant piping, max. height

Refrigerant connection, liquid pipe

Refrigerant connection, suction pipe

Dimensions:

Weight

EDP no.

V/Ph/Hz

°C

°C m 3 /h

IP dB (A) dB (A) kg t kPa g/m m m

Inches

(mm)

Inches

(mm) mm kg

RWT 355 DC AT RWT 525 DC AT

230/1~/50

+5 to +50 7)

+5 to +24 7)

2200 2100

IP24

0.71

0.48

3/8 (9.52)

555/854/314

26.6

1623421

R32

4300/1700

1/4 (6.35)

1.15

0.74

1/2 (12.7)

554/874/346

32.5

1623426

5) At distance of 1 m in the open air; specified values are maximum values

6) Contains greenhouse gas per the Kyoto protocol, GWP 675 (for further information, see chapter "Adding refrigerant")

7) Can be expanded up to -15 °C with optional winter fan speed control

REMKO RWT series

2.2 Unit dimensions, outdoor unit

A C

Fig. 1: Dimensions RWT 355-525 DC AT (all measurements in mm)

Measurements (mm)

RWT 355 DC

RWT 525 DC

839

874

555

554

314

346

452

511

286

317

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

2.3 Unit dimensions

793 200

Fig. 2: Unit dimensions RWT 355-525 DC IT (all measurements in mm)

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

3 Design and function

Unit description

The RWT 355-525 DC room air conditioners have an RWT...AT outdoor unit as well as an RWT...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 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 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.

3 4

Fig. 3: System layout

A: Outdoor area

B: Indoor area

1: Indoor unit

2: Outdoor unit

3: Condensate drainage line

4: Condenser fan

5: Power supply cable

6: Shut-off valve

7: Suction pipe

8: Control line

9: Injection pipe

EEV

FLT

Fig. 4: Cooling cycle schematic

A: Outdoor area

B: Indoor area

1: RWT

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

A B

REMKO RWT series

4 Operation

4.1 General notes

The indoor unit is easily operated using the standard infrared remote control. The indoor unit beeps to acknowledge the correct transmission of data. If it is not possible to program the indoor unit with the remote control, then it can also be manually operated.

Manual mode

The indoor unit can also be started manually. To do

this, after opening the front panel (see Fig. 5),

press the AUTO/COOL key next to the display

using a paper clip (see Fig. 6).

The following settings apply for manual operation:

Pressing once: Automatic mode 24 °C,

Pressing twice: Test mode cooling, after 30 minutes the unit switches to automatic mode with a setpoint of 24 °C.

Pressing three times: Unit OFF

OFF

AUTO

COOL

Fig. 6: Activating manual mode

1: “AUTO/COOL” key

Infrared remote control

The infrared remote control sends the programmed settings 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.

Two AAA batteries must be inserted into the remote control in preparation. To do so, remove

the flap from the battery compartment (see Fig. 8)

and insert the batteries the correct way around

(see markings). Removing the batteries causes all stored data to be lost. The remote control then reverts to the default settings.

max. 6 m

Mode

SET

Boost

Swing

LED Humidity

Fig. 7: Maximum distance

Fig. 5: Open the air inlet grille

Fig. 8: Inserting the batteries

Alarms are indicated by a code (see chapter

Troubleshooting and customer service).

Operation by means of an additional wired remote control or central regulation

The wired remote control, type KFB-3, can be connected to the devices. The connection to the indoor units is made ready to plug in (see chapter

“Electrical wiring”).

Furthermore, the SmartControl Touch SC-1

(Smart-Com) central regulation can be connected.

(See “Electrical wiring” chapter).

Operation via the REMKO Smart web portal or

REMKO Smart Control app

The units can be controlled with a connected SC-1

(Smart-Com) or a plugged-in WIFI stick via the

REMKO Smart web portal or via the REMKO

Smart-Control app. For more information on connecting to the indoor unit, see the chapter “Electrical wiring”.

4.2 Indicators on indoor unit

Indicator display

1 2 3

NOTICE!

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 longer periods.

Help save on energy consumption in stand-by mode! If the device, system or component is not in use, we recommend disconnecting the power supply. Components with a safety function is excluded from our recommendation!

Fig. 9: Indicator display

1: Segment display

2: ECO display

3: not available

4: not available

REMKO RWT series

4.3 Manual air distribution

Setting the air distribution

The vertical air control slats can be moved to the

left and right by hand (see Fig. 10). An automatic

swing function is also available for horizontal air distribution (see Chapter “Keys on the remote control”).

Fig. 11: Open the air inlet grille

Fig. 10: Setting the air distribution

Setting of the air outlet

If desired, the bottom air outlet of the unit can be deactivated. The air is then only blown out through the top air outlet. Proceed as follows to change the settings:

Disconnect the unit from the power supply and then restore it.

Open the air inlet grille (see Fig. 11)

Press and hold the discharge direction selection button for 5 seconds within 10 minutes after the power supply is restored.

After successful setting, the display shows the status of the bottom air outlet slat (on = open, off = closed).

Close the air inlet grille.

Fig. 12: Blow-out direction button

1: Blow-out direction button

4.4 Keys on the remote control

Mode

SET

Boost

Swing

LED Humidity

Fig. 13: Keys on the remote control

1 “On/Off” key

Press this key to switch the air conditioning unit on and off.

2 “Arrow up” temperature key

Increases the temperature setpoint in 0.5 °C increments up to the maximum setting value of 30 °C.

3 "SET" key

Cycles through the various additional functions at the top of the screen.

4 "Swing" key

Pressing briefly starts and stops the horizontal slat movement.

5 "Fan speed" key

Switches between the different fan speeds in the following order:

AUTO Þ 20% Þ 40% Þ 60% Þ 80% Þ 100% Þ ...

The fan speed can also be adjusted in 1% steps with the "Arrow up" and "Arrow down" keys.

Pressing and holding the key activates the silence function.

6 "Turbo" key

Activates or deactivates the turbo function to reach the setpoint as quickly as possible.

7 "Mode" key

Switches between the available operating modes in the following order:

AUTO Þ COOL Þ DRY Þ HEAT Þ FAN Þ ...

AUTO: Automatic mode

COOL: Cooling

DRY: Dehumidification

HEAT: Heating

FAN: Recirculation mode

8 "Airflow redirection" key

Activates the air deflection function where the air outlet slats are adjusted to guide the airflow along the wall. This prevents people in the room from being hit by the airflow and increases comfort.

9 "OK" key

Activates or deactivates a previously selected additional function.

10 “Timer” key

Activates or deactivates the switch-on or switch-off delay.

11 “Arrow down” temperature key

Reduces the temperature setpoint in 0.5 °C increments down to the minimum setpoint of 16 °C.

REMKO RWT series

12 "eco gear" key

Switches between the available energy-saving functions in the following order: eco Þ gear 75 % Þ gear 50 % Þ OFF Þ eco ...

eco: the setpoint is raised to 24 °C and the fan speed is set to automatic. If the setpoint is higher than 24°C before the eco function is activated, the setpoint is not changed.

If a setpoint of < 24 °C is set, the eco function is deactivated.

gear 75 %: inducts the power consumption to max. 75 %.

gear 50 %: inducts the power consumption to max. 50%

1 Additional functions

Breathe Away

Self clean

Bio Clean

Sleep

Follow me

Not available

2 Operating mode

Indicates the active operating mode.

3 Data transmission

Appears when data is transmitted from the infrared remote control to the indoor unit.

13 "Humidity" key

Switches the control variable from room temperature to relative humidity in "Dehumidification" operating mode.

4 Timer

Displays the corresponding symbol when the switch-on delay (ON) or switch-off delay (OFF) is activated.

14 "LED" key

Enables switching on/off the unit lighting and the signal tones (depending on the unit).

Indicators on the LCD

5 Silence

Appears when the silence function is active.

6 Horizontal swing function

Shows the position or the activated swing function of the horizontal swing slat.

7 Vertical swing function

Displays the position or the activated swing function of the vertical swing slats.

8 Not available

9 Turbo mode

Appears when turbo mode is activated.

6 7 8

Fig. 14: Indicators on the LCD

10 Battery indicator

Indicates the remaining capacity of the remote control battery.

11 eco gear

Appears when the eco gear function is activated.

12 Key lock

Appears when the remote control key lock is active.

13 Temperature indicators

Displays the setpoint for the temperature setting

(16 °C - 30 °C) or the relative humidity (35 % - 85

%).

14 Fan speed symbol

Displays the selected air speed. If the “Auto” or

“Dehumidify” operating mode is selected, the

“Auto” fan speed is automatically activated.

Key functions

"Auto" mode

Make sure that the indoor unit is connected to the power supply, and is switched on.

The operating mode indicator on the display of the indoor unit begins to flash.

Press the "ON/OFF" key [1] to switch on the air conditioning unit.

Press the "MODE" key [2] to select "Auto" mode.

Press the "Arrow up / Arrow down" key [3] to set the desired temperature. The temperature can be set to between 16 °C - 30 °C, in increments of 1 °C.

The illustration of the LCD with all of the symbols present is only intended to provide a clearer overview. During operation, only those symbols relevant to the respective functions appear on the display.

Mode

SET OK

Swing

Boost LED Humidity

Fig. 15: "Auto" mode

REMKO RWT series

"Cooling", "Heating" and "Recirculation" mode

Press the "ON/OFF" key [1] to switch on the air conditioning unit.

Press the "MODE" key [2] to select

"Cooling", "Heating" or "Recirculation" mode.

Press the "Arrow up / Arrow down" key [3] to set the desired temperature. The temperature can be set to between 16 °C - 30 °C, in increments of 0.5 °C. (only in heating and cooling operating modes).

Press the "FAN" key [4] to set the desired fan stage.

"Dehumidification" mode

Press the "ON/OFF" key [1] to switch on the air conditioning unit.

Press the "MODE" key [2] to select "Dehumidification" mode.

Press the "Humidity" key [4] to set the unit of the controlled variable to relative humidity

(RH).

Press the "Arrow up / Arrow down" key [3] to set the desired relative humidity. The setpoint can be adjusted between 35 and 85 % in 5 % increments.

Mode

SET OK

Boost

Swing

LED Humidity

Mode

SET OK

Boost

Swing

LED Humidity

Fig. 16: "Cooling", "Heating" and "Recirculation" mode

Fig. 17: "Dehumidification" mode

In the “Dehumidification” mode, manual selection of the fan speed is not possible! Please note that temperature pre-selection is not possible and the dehumidified room can cool dramatically!

"Timer" mode

Press the "TIMER" key to set the "switch-on time" and the "switch-off time" for the unit.

Setting the "switch-on time"

The air conditioning unit has two different timer modes:

Timer ON determines the time after which the unit automatically switches itself on.

Timer OFF determines the time after which the unit automatically switches itself off.

Activate the "Timer on" function by pressing the

Timer key [1]. The Timer ON symbol now appears on the display. Use the "Arrow up" and "Arrow down" keys [2] to select the desired switch-on time.

The function activates itself after one second.

The target temperature and the Timer ON symbol now appear on the display again as confirmation of the function.

Activate the "Timer OFF" function by pressing the

Timer key [1] twice. The "Timer OFF" symbol now appears on the display.

Use the "Arrow up" and "Arrow down" keys [2] to select the desired switch-off time. The function activates itself after one second.

The temperature and the Timer ON symbol now appear on the display again as confirmation of the function.

Both functions can also be used together. For example, if the unit is to switch on in 6 hours and switch off two hours later, proceed as follows:

Press the Timer key [1] and ensure that the Timer

ON symbol illuminates. Press the "Arrow up /

Arrow down" keys [2] until "6.0h" appears on the display. Now press the Timer key [1] again. The

Timer OFF symbol should appear on the display.

Use the "Arrow up / Arrow down" keys [2] to set the time to 8.0h and then wait one second for the functions to activate themselves automatically.

Times which have already been set can be changed. To do this, select either Timer ON or

Timer OFF mode and change the time using the

"Arrow up / Arrow down" keys [2]. Please note that this delay is then activated from the current point in time, not the point in time when the original programming took place!

Delays which have already been programmed can be deactivated by reducing the time to 0.0h in the respective menu (Timer ON or Timer OFF).

When the switch-on and switch-off times are being set, this can be done at 30 minute intervals for the first 10 hours, and at hourly intervals thereafter. The maximum switch-on or switch-off delay is 24 hours.

Mode

SET

Swing

Boost LED Humidity

Fig. 18: "Timer" mode

– When Timer mode is selected, the remote control automatically transfers the timer signal to the indoor unit for the specified period of time. Therefore, you should hold the remote control in a location where it can transfer the signal to the indoor unit without interference.

– The effective operation for the time settings by the remote control for the timer function is restricted to the following settings:

0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0,

5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10,

11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,

22, 23 and 24.

REMKO RWT series

Examples of TIMER function settings

"TIMER ON" (Auto on mode)

Example:

You want the air conditioning unit to switch on 2 hours from the time it was programmed.

Press the "TIMER" key. 0.0h and the "Timer

ON" symbol now appear on the display.

Press the "Arrow up" or "Arrow down" key until the desired start time appears in the

"TIMER ON" area of the remote control.

Wait for 3 seconds and the temperature appears again in this area of the digital display. The "TIMER ON" indicator stays lit, and this function is activated.

Off

Start

Combined TIMER (setting "TIMER ON" and

"TIMER OFF" at the same time)

"TIMER OFF ð "TIMER ON"

(On ð Stop ð Start)

Example:

You want the air conditioning unit to switch off in two hours from the time it was programmed, and switch back on ten hours later.

Press the "TIMER" key.

Press the "Arrow up" or " Arrow down" key until "10h" appears on the display.

Press the "TIMER" key.

Press the "Arrow up" or " Arrow down" key until "2h" is displayed.

Wait for 3 seconds and the temperature appears again in this area of the digital display. The "TIMER ON" and "TIMER OFF" indicators stay lit, and this function is activated.

Set time 2 hours later

Fig. 19: "TIMER ON" example

Start

Off

Stop

Set time 2 hours later after setting

5 hours later after setting

Fig. 21: "TIMER OFF"/"TIMER ON" example

"TIMER OFF" (Auto off mode)

Example:

You want the air conditioning unit to switch off 4 hours from the time it was programmed.

Press the "TIMER" key twice. 0.0h and the

"Timer OFF" symbol now appear on the display.

Press the "Arrow up" or "Arrow down" key until "4h" appears in the "TIMER OFF" area of the remote control.

Wait for 3 seconds and the temperature appears again in this area of the digital display. The "TIMER OFF" indicator stays lit, and this function is activated.

Additional functions

With the “Set” key [1] (see Fig. 22), the following

additional functions can be activated when the unit is switched on:

Self Clean

When the Self Clean function is activated, the indoor unit automatically cleans the heat exchanger to prevent mould and odour formation.

The cleaning process can take up to 45 minutes.

"CL" is shown on the unit display during the process.

Stop

Set time

Fig. 20: "TIMER OFF" example

4 hours later

BioClean

When the BioClean function is activated, negatively charged ions are added to the airflow to bind the particles contained in the air. The bundled particles then fall to the ground and can be filtered out of the air more easily.

Sleep

The sleep function can be used to save energy during night operation. When the sleep function is activated, the temperature setpoint is regularly reduced (cooling mode) or increased (heating mode).

Follow me

The "Follow me" function activates the temperature detection of the infrared remote control. The actual temperature is then transmitted to the indoor unit every 3 minutes. Note: In order for the temperature to be transmitted by the infrared remote control at all times, there must be visual contact between the infrared remote control and the indoor unit at all times.

AP function

Function not available

The desired function can then be selected with the

"Arrow up / Arrow down" keys [2] and confirmed with the "OK" key [3].

Frost protection function

The frost protection function keeps the room air temperature above 8 °C to prevent damage to the building structure.

Press the "ON/OFF" key [1] to switch on the air conditioning unit.

Press the "MODE" key [2] to select "Heating" mode.

Press the "Arrow down" key [3] until the temperature setpoint is at 16 °C. Then press the "Arrow down" key [3] twice within one second to activate the frost protection function

Mode

SET OK

Swing

Boost LED Humidity

Mode

SET OK

Boost

Swing

LED Humidity

Fig. 23: Frost protection function

Fig. 22: Additional functions

REMKO RWT series

Key lock

The frost protection function keeps the room air temperature above 8°C to prevent damage to the building structure.

Press the “Turbo” key [1] and the

“Humidity” key [2] at the same time for 5 seconds to activate and deactivate the key lock.

Mode

SET OK

Boost

Swing

LED Humidity

Fig. 24: Activate / deactivate key lock

5 Installation instructions for qualified personnel

5.1 Important notes prior to installation

5.2 Wall openings

n Transport the unit in its original packaging as close as possible to the installation location.

You avoid transport damage by doing so.

n Check the contents of the packaging for completeness and check the unit for visible transport damage. Report any damage immediately to your contractual partner and the shipping company.

n Lift the unit on the corners and not on the refrigerant or condensate drainage connections.

n The refrigerant piping (injection and suction pipe), valves and connections must be insulated against vapour density. If necessary also insulate the condensate drainage line.

n Select an installation location which allows air to freely flow through the air inlet and outlet

(see section "Minimum clearances").

n Do not install the unit in the immediate vicinity of devices which generate intensive thermal radiation. Installation in the vicinity of thermal radiation reduces the unit output.

n Only open the shut-off valves on the refrigerant piping after installation is complete.

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

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

n Use the fastening materials provided in the scope of supply for the units. .

n Use four supports and the associated hooks to attach the ceiling cassette.

n Use the insulated condensate hose in the scope of delivery as a junction piece to the continuing condensate drain. Secure the condensate drain with the supplied clamps.

n A wall opening of at least 70mm diameter and

10mm incline from the inside to the outside must be created.

n To prevent damage to the lines, the interior of the wall opening should be padded or, for example, lined with PVC pipe (see figure).

n After installation has been completed, use a suitable sealing compound to close off the wall opening, taking account of fire protection regulations (responsibility of customer). Do not use cement or lime containing substances!

1 2

3 4

Fig. 25: Wall opening

1: Liquid line

2: Control line

3: Condensate drainage line

4: Suction pipe

5: PVC pipe

5.3 Installation materials

The indoor unit is attached using 4 threaded rods provided by the customer.

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

REMKO RWT series

5.4 Selection of installation location

Indoor unit

The indoor unit is designed for horizontal ceiling installation. The minimum distance from the floor should be 2 metres.

Outdoor unit

The outdoor unit is designed for horizontal installation on a base in outdoor areas. The installation site must be level, flat and firm. The unit should also be secured to prevent it from tipping over. The outdoor unit can be set up outside as well as inside a building. For external installation, please observe the following notes to protect the unit from the influence of the weather.

Wind

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

Additional stabilisation is recommended. This can be realised with wire ropes or other constructions.

Rain

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

Fig. 26: Windbreak

1: Wind

Sun

The condenser on the outdoor unit emits heat.

Exposure to sunlight further increases the temperature of the fins and reduces the heat released by the finned heat exchanger. The outdoor unit should be installed on to the north side of the building whenever possible. If necessary, take measures to provide sufficient shade (responsibility of customer). This could be a small roof. However, the discharging warm air flow must not be affected by the measures.

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 unit. An optional wall bracket is available as an accessory.

20 cm

Fig. 27: Minimum clearance to snow

1: Snow

Installation inside buildings n Ensure that heat can dissipate adequately when placing the outdoor unit in cellars, lofts,

adjoining rooms or halls (Fig. 28).

n Install an additional fan with a rated flow comparative to that of the outdoor unit being installed in the room and which can compensate any additional pressure loss in ventilation

ducts (Fig. 28).

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

Fig. 28: Installation inside buildings

K: Cold fresh air

W: Warm air

1: Outdoor unit

2: Additional fan

3: Air shaft

5.5 Minimum clearances

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

E b a E 2 a

D b b

Fig. 29: Minimum clearances, indoor unit and outdoor unit (all measurements in mm)

1: Indoor unit / 2: Outdoor unit a: Air inlet / b: Air outlet

Outdoor units

Indoor units

300

150

2000

1000

600

150

300

100

600

100

REMKO RWT series

5.6 Oil return measures

If the outdoor unit 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 7 metres of height difference.

Fig. 30: Oil return measures

A: Outdoor unit

B: Indoor unit

1: 1 x oil pump bend in suction pipe to outdoor unit every 7 metres of height difference, radius:

50 mm

2: Max. 10-15 m

5.7 Connection variants

The following connection variants can be used for the refrigerant, condensate and control lines.

A B

C D

Fig. 31: Connection variants

A: Outflow, right

B: Outflow, left

C: Bottom outflow

D: Rear outflow

REMKO RWT series

5.8 Dimensions of rear of unit

170 420

50 170

Fig. 32: Rear of unit base dimensions (all measurements in mm)

A: Wall-mounted bracket

B: Spacer

C: Wall opening

150

6 Installation

6.1 Unit installation

NOTICE!

Installation should only be performed by authorised specialists.

The unit is attached via a wall bracket.

Mark the mounting points on the structurally permissible building sections according to the dimensions of the bracket.

Mount the wall bracket and the spacer on the wall using suitable mounting material.

If necessary, remove the break out opening of the housing.

Connect the refrigerant piping, electrical cables and condensate drainage line to the indoor unit as described below.

Hang the indoor unit onto the wall bracket by tilting it back slightly.

Check again that the unit is level.

6.2 Connection of refrigerant piping

The refrigerant piping connection provided by the customer takes place on one corner of the unit, inside the suspended ceiling. Once installed, the connections should be insulated to make them vapour diffusion proof.

NOTICE!

Use only tools which are approved for use in an

HVAC environment. (z. B.: bending pliers, pipe/ tubing cutters, de-burrers and flaring tools). Do not cut refrigerant pipes with a saw.

NOTICE!

All work must be carried out in a way that prevents dirt, particles, water etc. from entering, refrigerant lines!

NOTICE!

A detachable connection may only be established outside the room. To connect the indoor units, use only the supplied, non-detachable union nuts or provide a firm connection.

Fig. 33: Hanging in the wall bracket

REMKO RWT series

The following instructions describe the installation of the cooling cycle and the assembly of the indoor unit and the outdoor unit:

The required pipe diameters are given in the table "Technical data".

Install the indoor unit and connect the refrigerant piping as described in the operating manual for the indoor unit.

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

Ensure that structure-borne sound is not transferred to parts of the building. Use vibration dampers to reduce the effects of structure-borne sound!

Lay the refrigerant piping from the indoor unit to the outdoor unit. Ensure that the fastenings are adequate and if necessary, take appropriate oil return measures!

Remove the factory-fitted protective caps and union nuts on the connections. These should be used later in the installation process.

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

Prepare the laid refrigerant piping as shown

below (Fig. 34 and Fig. 35).

Verify that the shape of the flange is correct

(Fig. 36).

10.

First connect and hand-tighten the refrigerant piping to ensure it is correctly seated.

11.

Then tighten the fittings with 2 appropriatelysized open-ended spanners. Use a spanner to counter the force when tightening the fit-

ting (Fig. 37).

12.

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

13.

Observe the permitted bending radius for the refrigerant piping during installation. Never bend a pipe twice in the same place. Brittleness and cracking can result.

14.

Apply appropriate heat insulation to the installed refrigerant piping, including connector.

15.

Take the same action at the shut-off valves for all subsequent refrigerant piping.

Fig. 34: Deburring the refrigerant piping

1: Refrigerant piping /2: Deburrer

Fig. 35: Flanging the refrigerant piping

1: Flanging tool

Fig. 36: Correct flange shape

Fig. 37: Tightening the fitting

1: Tighten with the first open-ended spanner

2: Counter with the second open-ended spanner

Tightening torque in Nm Pipe dimension in inches

1/4"

3/8"

1/2"

5/8"

3/4"

15-20

33-40

50-60

65-75

95-105

6.3 Leak testing

Once all the connections have been established, the pressure gauge station is attached to the corresponding Schrader valve connection as follows: blue = large valve = suction pressure

Once the connection has been made successfully, the leak test is carried out with dry nitrogen.

Leak testing involves spraying a leak detection spray onto the connections. If bubbles are visible, the connections have not been made properly. In that case, tighten the connection or, if necessary, create a new flange.

After completing a successful leak test, the excess pressure in the refrigerant piping is removed and a vacuum pump with an absolute final partial pressure of min. 10 mbar is used to remove all of the air and empty the pipes. Any moisture present in the pipes will also be removed.

NOTICE!

A vacuum of at least 20 mbar must be produced!

The time required to generate the vacuum is dependent on the final pressure pipe volume of the indoor units and the length of the refrigerant piping.

However, the process will take 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 "Commissioning" section.

REMKO RWT series

6.4 Adding refrigerant

The units contain a basic quantity of refrigerant. In addition, an additional amount of refrigerant must be added for refrigerant piping lengths exceeding 5 metres per circuit. Refer to the following chart:

Up to and incl. 5m

From 5m to max. length

RWT 355 DC

RWT 525 DC

0 g/m 15 g/m

CAUTION!

Wear protective clothing when handling refrigerant.

DANGER!

Only refrigerant in a liquid state may be used to fill the cooling cycle!

NOTICE!

Check the overheating to determine the refrigerant fill quantity.

7 Condensate drainage connection and safe drainage

Condensate drainage connection

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

n The condensate drainage line should have an incline of min. 2% and is the responsibility of the customer. If necessary, fit vapour-diffusionproof insulation.

n If the level of the condensate drainage line on the unit is above that of the outlet, route the pipe vertically upwards and then with an incline to the drain.

n Route the unit's condensate drainage line freely into the drain line. If the condensate runs directly into a sewer pipe, fit a trap to prevent any unpleasant odours.

n When operating the unit at outside temperatures below 4 °C, ensure the condensate drainage line is laid to protect it against frost. If necessary, fit a pipe heater.

n Following installation, check that the condensate run off is unobstructed and ensure that the line is durably leak tight.

NOTICE!

The escape of refrigerant contributes to climatic change. In the event of escape, refrigerant with a low greenhouse potential has a lesser impact on global warming than those with a high greenhouse potential.

This unit contains refrigerant with a greenhouse potential of 675. That means the escape of 1 kg of this refrigerant has an effect on global warming that is 675 times greater than 1 kg

, based on 100 years. Do not conduct any work on the refrigerant circuit or dismantle the unit - always enlist the help of qualified experts.

Fig. 38: Condensate drainage connection

The condensate hose is designed to be connected on the left-hand side (as viewed from the front).

Safe drainage in the event of leakages

Local regulations or environmental laws, for example the German Water Resource Act (WHG), can require suitable precautions to protect against uncontrolled drainage in case of leakage to provide for safe disposal of escaping air conditioning fluid or hazardous media.

NOTICE!

If condensate is removed via a duct in accordance with DIN EN 1717, ensure that any microbiological contamination present on the wastewater side (bacteria, fungi, viruses) cannot enter the unit connected to it.

REMKO RWT series

8 Electrical wiring

8.1 General connection and safety instructions

A protected power supply cable is to be connected to the outdoor unit and four-core control line with minimum cross-section 1.5 mm 2 to the indoor unit respectively.

is to be connected

To avoid EMC interference, only use shielded cable for this purpose and connect the shielding on both sides.

DANGER!

All electrical installation work is to be performed by specialist companies. Disconnect the power supply when connecting the electrical terminals.

8.2 Connecting the indoor unit

Make the connection as follows:

Open the air inlet grille (see Fig. 39).

Loosen the screw of the PCB housing (see

Fig. 40) and disconnect the existing plug con-

nections. The circuit board housing can then be removed.

Loosen the screws on the terminal block and

the strain relief (see Fig. 41) and remove the

test plug.

Clamp the control line provided by the customer to the terminals according to the connection diagram and fasten the cable with the strain relief.

Re-assemble the unit in reverse order.

NOTICE!

The electrical connection for the units must be made at a separate feedpoint with a residual current device in accordance with local regulations and should be laid out by an electrician.

n We recommend that a mains/repair switch be installed near the outdoor unit.

n The cables must be inserted into the indoor unit from the rear. The terminal blocks for the connections are located behind the PCB housing on the front right-hand side of the unit.

n The control lines used should comprise shielded wire, if laid in areas exposed to strong magnetic fields.

n Details concerning the electrical protection of the system are provided in the technical data.

Fig. 39: Opening the air inlet grille

Fig. 40: Removing the PCB housing

Connection of an optional wired remote control

(KFB-3)

A wired remote control (KFB-3) can be connected optionally to the units.

Make the connection as follows:

Open the air inlet grille (see Fig. 39).

Loosen the screw of the PCB housing (see

Fig. 40) and remove the PCB housing.

Insert the connection cable of the wired remote control through the rear opening into the unit housing.

Clamp the plug of the laid connection cable to the unit-side connection plug for the wired

remote control (see Fig. 42).

Re-assemble the unit in reverse order.

For further information on the connection of the wired remote control (KFB-3), please refer to the corresponding operating instructions.

Fig. 41: Electrical wiring

1: Terminal block

2: Strain relief

Fig. 42: Connection plug KFB-3

REMKO RWT series

Connections of the multifunction PCB

The units are equipped with a multifunction PCB as standard, which is located in the PCB housing on the right-hand side of the unit. Several screw terminals are positioned on the multifunction PCB, which allow the connection of various controls to the indoor unit. The following accessory controllers can be connected using the multifunction PCB: n REMKO Smart-Control Touch SC-1 n REMKO Smart-Control Touch SC-1 Smart-

Com n REMKO Redundancy Module KFB-R n Customer-provided superordinate regulation

CN46

F 0 1

B A 9 8 7 6

ON F1 ON F2

ON ON

1 2 1 2

CN42 CN41

4 5 6

CN45

Fig. 44: Connections of the multifunction PCB

1 External “on/off” contact

The external “on/off” contact enables external enabling or disabling of the indoor unit from a remote location. If the contact is opened, the indoor unit goes into standby mode and the display indicates

CP. When the contact is closed, the unit returns to its last operating state. The contact is closed with a wire bridge as standard.

Fig. 43: Position of the multifunction PCB

COOL

Fig. 45: External “on/off” contact

2 DIP switch block addressing

The address of the indoor unit is determined using the DIP switches in combination with the rotary switch (see chapter “Addressing”).

Note:

Addressing is only necessary in combination with an SC-1 (Smart-Com).

3 Rotary switch addressing

The address of the indoor unit is determined using the rotary switch in combination with the DIP switches (see chapter “Addressing”).

Note:

Addressing is only necessary in combination with an SC-1 (Smart-Com).

4 Smart-Control Touch SC-1 Smart-Com connection

Enables the connection of an SC-1 (Smart-Com) to the indoor unit.

Note:

During commissioning, it is necessary to carry out addressing (see chapter “Addressing”).

5 Not used

6 Alarm contact

In trouble-free operation, the contact is open. In the event of a malfunction, an error code is indicated on the display and the contact between the two screw terminals is closed.

Connection of an optional central regulation

(SC-1, SC-1 Smart-Com)

A central regulation (SC-1) can be connected optionally to the units.

Make the connection as follows:

Open the air inlet grille (see Fig. 39).

Loosen the screw of the PCB housing (see

Fig. 40) and remove the PCB housing.

Separate the PCB housing cover from the base plate and open the PCB housing.

Insert the connection cables through the rear opening into the unit housing.

Connect the routed connection cables to the corresponding screw terminals on the multi-

function PCB (see Fig. 47).

Set the address for the indoor unit using the

DIP switches and rotary switches (see chapter “Addressing”)

Re-assemble the unit in reverse order.

For further information on the connection of the central regulation (SC-1), please refer to the corresponding operating instructions.

CN46

0 1

B A 9 8 7 6

ON F1 ON F2

ON ON

1 2 1 2

CN42 CN41 CN45

COOL

Fig. 46: Alarm contact

ALARM

Fig. 47: SC-1 (Smart-Com) connection

REMKO RWT series

Addressing the indoor unit (SC-1, SC-1 Smart-

Com)

Indoor units that are connected to a central regulation system must be assigned a unit address from

0 to 63 for assignment in the unit bus. If several indoor units are connected to a central regulation, it must be ensured that no unit address is assigned more than once.

The unit address is assigned to the indoor units using the ENC3 rotary switch and the DIP switch

F1. The general setting range is determined by

DIP switch F1. The setting ranges result from the following DIP switch positions:

ON ON ON ON

The rotary switch ENC3 is then used to specify the unit address more precisely. The unit address results from the combination of the two switches as follows:

ON ON ON ON

1 2

ON F1

0-15

1 2

ON F1

16-31

Fig. 48: DIP switch positions

1 2

ON F1

32-47

1 2

ON F1

48-63

0 1

8 9

1 2 1 2 1 2 1 2

ON F1

Example:

1 2

ON F1

F 0 1

A 9 8 7 6

ENC3

Connection of an optional redundancy module

(KFB-R)

A redundancy module (KFB-R) can be connected optionally to the units.

Make the connection as follows:

Open the air inlet grille (see Fig. 39).

Loosen the screw of the PCB housing (see

Fig. 40) and remove the PCB housing.

Separate the PCB housing cover from the base plate and open the PCB housing.

Insert the connection cables through the rear opening into the unit housing.

Connect the routed connection cables to the corresponding screw terminals on the multi-

function PCB (see Fig. 49).

Re-assemble the unit in reverse order.

For further information on the connection of the redundancy module (KFB-R), please refer to the corresponding operating instructions.

CN46

0 1

B A 9 8 7 6

ON F1 ON F2

ON ON

1 2 1 2

CN42 CN41 CN45

Installation of an optional WIFI stick

The units are equipped with an interface for a WIFI stick as standard, which is located in the PCB housing on the right-hand side of the unit. The

WIFI stick can simply be inserted into the recess and plugged into the USB interface.

The installation of the WIFI stick can be done as follows:

Open the air inlet grille (see Fig. 39).

Loosen the screw of the PCB housing (see

Fig. 40) and remove the PCB housing.

Separate the PCB housing cover from the base plate and open the PCB housing.

Insert the WIFI stick into the USB interface provided (see ) and perform configuration.

Re-assemble the unit in reverse order.

1 2 3

Fig. 49: Connection KFB-R

1: External connecting line “on/off”

2: Alarm connecting line

Fig. 50: Installation position of the WIFI stick

REMKO RWT series

8.3 Outdoor unit connection

Proceed as follows to connect the line:

Remove the unit cover.

Remove the side panel at the connection.

Choose the cable cross-section in accordance with the relevant specifications.

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

Connect the lines as shown on the electrical wiring diagram.

Fix the line in the strain relief and reassemble the unit.

8.4 Electrical wiring diagram

A B

1(L) 2(N) S L N

PE PE

230V/1~/50 Hz

Fig. 51: Electrical wiring diagram

A: Outdoor unit

B: Indoor unit

L N S PE

1: Power supply cable

2: Communication lines

Connection of optional condensate pump KP 6/KP 8

1(L) 2(N) S PE

L(A) N(A) S(A) PE

230 V/1~/50 Hz

Fig. 52: Electrical wiring diagram

A: Outdoor unit

B: Indoor unit

C: KP6/KP8 condensate pump

1: Power supply cable

2: Condensate pump supply

3: Condensate pump fault contact

BK: black

WH: white

REMKO RWT series

8.5 Electrical drawings

Indoor units

CN12

CN42

N sw rd ge (ws) ge/gn

L N S

3 4

CN81

CN32

CN23

CN19

CN15

CN18

SW1

SW2

CN4 CN5 CN1

2 5 3 4

CN2 CN3

5 4

13 14 15 16

Fig. 53: Electrical drawings for indoor units

10:

11:

12:

Control board

Display circuit board

Multifunction PCB

Evaporator fan, bottom

Evaporator fan, top

Ion generator

Slat motor, top

Slat motor, bottom

Temperature probe, evaporator

Terminal block

DIP switch addressing

Alarm contact

XYE connection SC-1 (optional)

Rotary switch addressing

External on/off contact

13:

14:

15:

16:

17:

18:

Colour codes: blu: ye: grn: rd: blk: ws:

Temperature probe, indoor air

Room air humidity sensor

Wired remote control connection

(KFB-3, optional)

WIFI stick connection (optional)

Slat motor, bottom key

Manual mode key

Blue

Yellow

Green

Red

Black

White

Outdoor units

CN 9

CN 32

CN 30

CN 29

CN 28

CN 21

CN 7

CN 1A

CN 60

CN 17

CN 15

CN 25

CN 31

5/6

2/3/4/5

1(L) 2(N) S L N

3 4

4/5

14 13 12

Fig. 54: Electrical drawings for outdoor units

A: Control board

1: Compressor

2: Transformer

3: Connecting line to the indoor unit

4: Power supply

5: 4-way reversing valve

6: Crankcase heating

7: Condensate tray heating

11 10

8: Capacitor

9: AC fan

10: Electronic E-valve

11: DC fan motor

12: Air inlet temperature probe

13: Temperature probe for condenser outlet

14: Temperature probe for heat gas line

---: Optional

REMKO RWT series

9 Before commissioning

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

Perform the following checks prior to putting the unit into operation for the first time and after any work on the cooling cycle. Record the results in the commissioning report: n Check all refrigerant piping and valves for leaktightness using leak detection spray or soapy water.

n Check the refrigerant piping and insulation for damage.

n Check the electrical connection between the indoor unit and the outdoor unit for correct polarity.

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

10 Commissioning

NOTICE!

Commissioning should only be performed by specially trained personnel and documented after the certificate has been issued. Observe the operating manuals for the indoor unit and outdoor unit when commissioning the entire system.

Once all the components have been connected and tested, the system can be put into operation. A functional check should be performed to verify its correct function and identify any unusual operating behaviour prior to handing it over to the operator.

NOTICE!

Check that the shut-off valves and valve caps are tight after carrying out any work on the cooling cycle. Use appropriate sealant products as necessary.

Functional checks and test run

Check the following points: n Leak-tightness of the refrigerant piping.

n Compressor and fan running smoothly.

n In cooling mode, cold air output by the indoor unit, and warm air output by the outdoor unit.

n Function test of the indoor unit and all program sequences.

n Check of the surface temperature of the suction pipe and that the vaporiser is not 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.

n Record the measured temperatures in the commissioning report.

Function test of the cooling and heating modes

Remove the protective caps from the valves.

Start the commissioning procedure by briefly opening the shut-off valves on the outdoor unit until the pressure gauge indicates a pressure of approx. 2 bar.

Check all connections for leaks with leak detection spray and suitable leak detectors.

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

Activate the main circuit breaker or fuse.

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

Check the overheating, outside, inside, 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.

Check the unit control system using the functions described in the chapter "Operation".

Timer, temperature setting, fan speeds and switching to ventilation or dehumidification mode.

Check the correct function of the condensate drainage line by pouring distilled water into the condensate tray. A bottle with a spout is recommended for pouring the water into the condensate tray.

10.

Switch the indoor unit to heating mode.

11.

During the test run, check the functionality of all of the previously described safety devices.

12.

Record the measured values into the commissioning report and familiarise the operator with the system.

13.

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

14.

Re-install all disassembled parts.

11 Shutdown

Temporary shutdown

Let the indoor unit run for 2 to 3 hours in recirculation mode, or in cooling mode at maximum temperature, to extract any residual humidity from the unit.

Shut down the system using the remote control.

Switch off the electrical power supply to the unit.

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

Permanent shutdown

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

REMKO GmbH & Co. KG or your contractual partner will be pleased to provide a list of certified firms in your area.

REMKO RWT series

12 Troubleshooting and customer service

The unit and components are manufactured using state-of-the-art production methods and tested several times to verify that they function correctly. However, if malfunctions should occur, please check the functions as detailed in the list below. For systems with an indoor unit and outdoor unit, refer to the chapter "Troubleshooting and customer service" in both operating manuals. Please inform your dealer if the unit is still not working correctly after all function checks have been performed!

Operational malfunctions

Malfunction

The unit does not start or switches itself off

The unit does not respond to the remote control

Possible causes

Power failure, undervoltage, defective mains fuse/main switch in OFF position

Damaged power supply cable

Wait time after switching on is too short

Temperature outside operating range

Electrical surges caused by thunderstorms

Checks

Does all other electrical equipment function correctly?

Remedial measures

Check the voltage and if necessary, wait for it to come back on

Does all other elec.

equipment function correctly?

Have approx. 5 minutes elapsed since the restart?

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

Have there been lightning strikes in the area recently?

Repair by specialist firm

Schedule longer wait times

Observe temperature ranges of indoor unit and outdoor unit

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

Check and if necessary clean the pump

Malfunction of the external condensate pump

High pressure / low pressure switches have triggered

Transmission distance too far/receiver affected by interference

Has the pump shut down due to a malfunction?

Check refrigerant pressure and look for leaks if necessary

Does the indoor unit beep when pressing a key?

Remote control is faulty Is the unit running in manual mode?

Receiver or transmitter unit exposed to excessive solar radiation

Does it function correctly in the shade?

Electromagnetic fields are interfering with transmission

Key on remote control stuck/dual key operation

Batteries in remote control are flat

Does it function after removing potential sources of interference?

Does the "Transmitting" symbol appear on the display?

Have new batteries been inserted? Is the display incomplete?

Rectify leakage and restart

Reduce the distance to less than 6 m or change position

Replace the remote control

Place the receiver and/or transmitter unit in the shade

Signal is not transmitted when interference sources are operational

Release the key/only press one key

Insert new batteries

Malfunction

The unit is running but only provides reduced or no cooling or heating capacity

Condensate discharge on unit

Possible causes

Filter is dirty/air inlet/ outlet opening is blocked by debris

Windows and doors open. Heating/cooling load has increased

Neither cooling nor heating mode has been set

Slats on outdoor unit blocked by foreign objects

Leaking cooling cycle

Checks

Have the filters been cleaned?

Have structural/usage modifications been made?

Does the cooling symbol appear on the display?

Outdoor unit iced up

Drainage pipe on collection container clogged/ damaged

Faulty external condensate pump or float

Condensate has not drained away and has collected in the condensate drainage line

Condensate does not drain off

Float is stuck or jammed due to excessive dirt

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

Are there signs of frost on the exchanger slats of the indoor unit?

Check outdoor unit. Has the cassette probe on the outdoor unit been correctly positioned?

Can the condensate drain off without any obstruction?

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

Is there an incline on the condensate drainage line and is it clear?

Check the fan or winter fan speed control, reduce the air resistance

Repair by specialist

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

Clean the drainage pipe and collection container

Call out a specialist to replace the pump

Route the condensate drainage line with an incline and clean it

Are the condensate drainage lines clear and is there an incline? Are the condensate pump and liquid level switch functioning correctly?

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

Remedial measures

Clean the filters

Close windows and doors/install additional units

Correct the settings for the unit

Route the condensate drainage line with an incline and clean it. If the liquid level switch or the condensate pump is defective, have them replaced

Should be cleaned by specialist firm

NOTE

If the outdoor unit makes noises at low outside temperatures, even although it is switched off, this is not a malfunction. This is the winding of the compressor being run briefly in order to heat up the oil within it and also to guarantee the viscosity at low ambient temperatures. If you do not use the unit in the winter then you can switch off the breaker. Switch it back on again at least 12 hours before the next time that the unit will be required!

REMKO RWT series

Status/fault display on the indoor unit

Indicator Error description dF Defrosting active (status)

Self clean function active (status)

No enabling (external On / Off) (status)

EH 00

EH 0A

EL 01

EH 03

EH 31

EH 32

EH 60

EH 61

EH 0b

PC 08

EC 51

EC 52

EC 53

EC 54

EC 55

EC 07

PC 00

PC 01

PC 02

PC 03

PC 04

EL 0C

EEPROM error, indoor unit

Communication error between indoor unit and outdoor unit

Fan speed control indoor unit disabled

Top evaporator fan speed control disabled

Bottom evaporator fan speed control disabled

Room temperature probe T1 defective

Temperature probe, evaporator T2 defective

Communication error between control board and display board

Overflow protection

EEPROM error, outdoor unit

Temperature probe, evaporator outlet T3 defective

Temperature probe air inlet outdoor unit T4 defective

Temperature probe, heat gas line TP defective

Temperature probe, IGBT TH defective

Condenser fan speed control not working

Compressor actuation error

Overvoltage or undervoltage error

Compressor overheating protection (heat gas temperature too high)

High pressure or low pressure alarm

Inverter control disabled

No cooling capacity after 30 minutes

13 Care and maintenance

Regular care and observation of some basic points will ensure trouble-free operation and a long service life.

DANGER!

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

Care n Ensure that the indoor unit and outdoor unit are free of dirt, mould and other deposits.

n Only clean the units with a damp cloth. Do not use any caustic, abrasive or solvent-based cleaning products. Do not use a jet of water.

Type of task

Checks/maintenance/inspection

General

Check voltage and current

Check function of compressor / fans

Dirt on condenser / evaporator

Check the refrigerant volume

Check condensate drainage

Check insulation

Check moving parts

Sealing test for cooling cycle

1) see note below

Cleaning the cover on the indoor unit

Disconnect the power supply to the unit.

Open and fold down the air inlet guard on the cover. The filter is held in place by the flaps screwed in on the side of the guard.

Clean the grill and cover with a soft, damp cloth.

Switch the power supply back on.

Air filter for indoor unit

We recommend cleaning the air filter at intervals of no more than 2 weeks. Reduce this interval if the air is especially dirty.

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

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

n For systems which operate year-round (e.g. in server rooms), the maintenance intervals must be reduced accordingly.

This enables you to ensure the operational reliability of the plant at all times!

Commissioning l l l l l l l l l

Monthly l

Halfyearly l l

Yearly l l l l l l 1)

NOTICE!

Statutory regulations require an annual leak test for the cooling cycle dependant on the refrigerant quantity. Inspection and documentation of the work performed is to be carried out by specialist technicians.

REMKO RWT series

Cleaning the housing

Disconnect the power supply to the unit.

Open the air inlet grill on the front side and fold it forwards or backwards.

Clean the grill and cover with a soft, damp cloth.

Close the grill.

Switch the power supply back on.

Observe the care and maintenance instructions in the separate operating manual

Air filter for indoor unit

Clean the air filter at intervals of no more than 2 weeks. Reduce this interval if the air is especially dirty.

Cleaning the filter

Disconnect the power supply to the unit.

Open the front side of the unit by folding the

grill down/forwards (Fig. 55).

Pull the filter out in an upwards direction.

Clean the filter with a commercially available vacuum cleaner. To do so, turn the dirty side

so it is facing upwards (Fig. 56).

Dirt can also be removed by carefully cleaning with lukewarm water and mild

cleaning agents (Fig. 57). The dirty side

should be face down.

If water is used, let the filter dry out properly in the air before fitting it back into the unit.

Carefully insert the filter. Ensure that it locates correctly.

Close the front side as described above in reverse order.

Switch the power supply back on.

10.

Switch the unit back on.

Cleaning the condensate pump (accessories)

The indoor unit may contain an optional integrated or separate condensate pump, which pumps out any accumulated condensate into higher positioned drains.

Fig. 55: Open the air inlet grille

Fig. 56: Cleaning with a vacuum cleaner

Fig. 57: Cleaning with lukewarm water

14 Exploded view and spare parts lists

14.1 Exploded view - Indoor unit

Fig. 58: Exploded view - Indoor unit

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

REMKO RWT series

14.2 Spare parts list - Indoor unit

IMPORTANT!

To ensure the correct delivery of spare parts, please always the device type with the corresponding serial number (see type plate)

No. Designation

1 Front panel

2 Air filter

3 Housing front

4 Condensate tray

5 Air outlet slats, top, set

6 Slat bearing

7 Slat motor, top

8 Temperature probe, evaporator

9 Fan motor, top

10 Fan roller

11 Bearing bracket

12 Fan bearing

13 Bearing bracket

14 Fan bearing

15 Fan roller

No. Designation

16 Fan motor, bottom

17 Air outlet slats, bottom, set

18 Slat motor, bottom

19 Humidity probe

20 Display circuit board

21 PCB box mounting plate

22 PCB box cover

23 Temperature probe, indoor air

24 Electronics module, complete

25 Electrical connections cover

26 Mounting rail, top

27 Spacer

28 Housing back

29 Unit connection housing corner

30 Evaporator

31 Infrared remote control holder

32 Infrared remote control

14.3 Exploded view - Outdoor unit RWT 355 DC

7 8

Fig. 59: Exploded view of the unit RWT 355 DC AT

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

REMKO RWT series

14.4 Spare parts list - Outdoor unit RWT 355 DC

IMPORTANT!

To ensure the correct delivery of spare parts, please always the device type with the corresponding serial number (see type plate)

No. Designation

1 Cover panel

2 Protection grid, front wall

3 Front panel

4 Fan blade

5 Fan motor

6 Fan motor mounting plate

7 Corner panel, left

8 Condenser

9 Air inlet temperature probe

10 Electronic injection valve

11 Shut-off valve, injection pipe

12 4-way reversing valve

13 Shut-off valve, suction pipe

14 Partitioning panel

15 Temperature probe for heat gas line

16 Compressor

17 Floor panel

18 Side panel, right

19 Refrigerant connections cover

20 Terminal block cover

21 Control board

22 Temperature probe for condenser outlet

23 Condensate tray heating

24 Crankcase heating

25 Mounting plate for refrigerant connections

14.5 Exploded view - Outdoor unit RWT 525 DC

4 5

18 19

Fig. 60: Exploded view of the unit RWT 525 DC AT

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

REMKO RWT series

14.6 Spare parts list - Outdoor unit RWT 525 DC

IMPORTANT!

To ensure the correct delivery of spare parts, please always the device type with the corresponding serial number (see type plate)

No. Designation

1 Cover panel

2 Protection grid, front wall

3 Front panel

4 Fan blade

5 Fan motor

6 Fan motor mounting plate

7 Corner panel, left

8 Condenser

9 Air inlet temperature probe

10 Electronic injection valve

11 Shut-off valve, injection pipe

12 4-way reversing valve

13 Shut-off valve, suction pipe

14 Partitioning panel

15 Temperature probe for heat gas line

16 Compressor

17 Floor panel

18 Side panel, right

19 Refrigerant connections cover

20 Control board

21 Auxiliary circuit board

22 Temperature probe for condenser outlet

23 Condensate tray heating

24 Crankcase heating

15 Index

Air distribution, manual . . . . . . . . . . . . . . . . . . . 16

Care and maintenance . . . . . . . . . . . . . . . . . . . 51

Cleaning

Air filter for indoor unit . . . . . . . . . . . . . . 51, 52

Condensate pump . . . . . . . . . . . . . . . . . . . . 52

Cover on the indoor unit . . . . . . . . . . . . . . . . 51

Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Condensate drainage connection . . . . . . . . . . . 34

Condensate pump, electrical wiring diagram . . 43

Connection variants . . . . . . . . . . . . . . . . . . . . . 29

Customer service . . . . . . . . . . . . . . . . . . . . . . . 48

Design and function . . . . . . . . . . . . . . . . . . . . . 13

Dimensions of rear of unit . . . . . . . . . . . . . . . . . 30

Disposal of equipment . . . . . . . . . . . . . . . . . . . . . 8

Electrical drawings . . . . . . . . . . . . . . . . . . . 44, 45

Indoor units . . . . . . . . . . . . . . . . . . . . . . . . . 44

Outdoor units . . . . . . . . . . . . . . . . . . . . . . . . 45

Electrical wiring . . . . . . . . . . . . . . . . . . . . . . . . . 36

Indoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Electrical wiring diagram . . . . . . . . . . . . . . . . . . 42

Electrical wiring diagram, condensate pump . . 43

Environmental protection . . . . . . . . . . . . . . . . . . . 8

Exploded view of the unit . . . . . . . . . . . . . . 55, 57

Fault display on the indoor unit . . . . . . . . . . . . . 50

Function test of the cooling and heating modes 47

Functional checks . . . . . . . . . . . . . . . . . . . . . . . 46

Infrared remote control . . . . . . . . . . . . . . . . . . . 14

Installation location, selection . . . . . . . . . . . . . . 26

Installation materials . . . . . . . . . . . . . . . . . . . . . 25

Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Keys on the remote control . . . . . . . . . . . . . . . . 17

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Malfunctions

Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Possible causes . . . . . . . . . . . . . . . . . . . . . . 48

Remedial measures . . . . . . . . . . . . . . . . . . . 48

Manual air distribution . . . . . . . . . . . . . . . . . . . . 16

Manual mode . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Minimum clearances . . . . . . . . . . . . . . . . . . . . . 27

Oil return measures . . . . . . . . . . . . . . . . . . . . . . 28

Ordering spare parts . . . . . . . . . . . . . . . 54, 56, 58

Rear of unit, dimensions . . . . . . . . . . . . . . . . . . 30

Remote control

Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Safe drainage in the event of leakages . . . . . . . 35

Safety

Dangers of failure to observe the safety

notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Identification of notes . . . . . . . . . . . . . . . . . . . 5

Instructions for the operator . . . . . . . . . . . . . . 6

Note for inspection work . . . . . . . . . . . . . . . . . 6

Note for installation work . . . . . . . . . . . . . . . . 6

Note for maintenance work . . . . . . . . . . . . . . 6

Personnel qualifications . . . . . . . . . . . . . . . . . 5

Safety-conscious working . . . . . . . . . . . . . . . . 6

Unauthorised modification . . . . . . . . . . . . . . . 7

Unauthorised replacement part manufacture . 7

Selection of installation location . . . . . . . . . . . . 26

Shutdown

Permanent . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Temporary . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Spare parts list . . . . . . . . . . . . . . . . . . . 54, 56, 58

Indoor units . . . . . . . . . . . . . . . . . . . . . . . . . 54

Status display on the indoor unit . . . . . . . . . . . 50

Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Troubleshooting and customer service . . . . . . . 48

Unit description . . . . . . . . . . . . . . . . . . . . . . . . . 13

Unit dimensions

Indoor units . . . . . . . . . . . . . . . . . . . . . . . . . 12

Outdoor units . . . . . . . . . . . . . . . . . . . . . . . . 12

Unit installation . . . . . . . . . . . . . . . . . . . . . . . . . 31

View of the unit . . . . . . . . . . . . . . . . . . . . . . . . . 53

Indoor units . . . . . . . . . . . . . . . . . . . . . . . . . 53

Wall opening . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

REMKO QUALITY WITH SYSTEMS

Air-Conditioning | Heating | New Energies

REMKO GmbH & Co. KG

Klima- und Wärmetechnik

Im Seelenkamp 12

32791 Lage

Telephone +49 (0) 5232 606-0

Telefax +49 (0) 5232 606-260

E-mail [email protected]

URL www.remko.de

Hotline within Germany

+49 (0) 5232 606-0

Hotline International

+49 (0) 5232 606-130

Operating and installation instructions

REMKO RWT series

Wall chests for cooling and heating

Table of contents

1 Safety and usage instructions

1.1 General safety notes

1.2 Identification of notes

1.3 Personnel qualifications

1.4 Dangers of failure to observe the safety notes

1.5 Safety-conscious working

1.6 Safety instructions for the operator

1.7 Safety notes for installation, maintenance and inspection

1.8 Unauthorised modification and changes

1.9 Intended use

1.10 Warranty

1.11 Transport and packaging

1.12 Environmental protection and recycling

2 Technical data

2.1 Unit data

2.2 Unit dimensions, outdoor unit

2.3 Unit dimensions

3 Design and function

4 Operation

4.1 General notes

4.2 Indicators on indoor unit

4.3 Manual air distribution

4.4 Keys on the remote control

5 Installation instructions for qualified personnel

5.1 Important notes prior to installation

5.2 Wall openings

5.3 Installation materials

5.4 Selection of installation location

5.5 Minimum clearances

5.6 Oil return measures

5.7 Connection variants

5.8 Dimensions of rear of unit

6 Installation

6.1 Unit installation

6.2 Connection of refrigerant piping

6.3 Leak testing

6.4 Adding refrigerant

7 Condensate drainage connection and safe drainage

8 Electrical wiring

8.1 General connection and safety instructions

8.2 Connecting the indoor unit

COOL

COOL

ALARM

8.3 Outdoor unit connection

8.4 Electrical wiring diagram

8.5 Electrical drawings

9 Before commissioning

10 Commissioning

11 Shutdown

12 Troubleshooting and customer service

13 Care and maintenance

14 Exploded view and spare parts lists

14.1 Exploded view - Indoor unit

14.2 Spare parts list - Indoor unit

14.3 Exploded view - Outdoor unit RWT 355 DC

14.4 Spare parts list - Outdoor unit RWT 355 DC

14.5 Exploded view - Outdoor unit RWT 525 DC

14.6 Spare parts list - Outdoor unit RWT 525 DC

15 Index

REMKO QUALITY WITH SYSTEMS

Air-Conditioning | Heating | New Energies

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