REMKO MD MD 261, MD 351 Inverter wall - room air conditioner in split design Operation · Technology · Spare parts Issue GB – T11
Contents Safety notes 4 Environmental protection and recycling 4 Warranty 4 Transport and packaging 5 Description of the equipment 5 Operation 6-12 Shutdown 13 Care and maintenance 13-14 Troubleshooting and customer service 15-16 Installation instructions for qualified personnel 16-19 Installation 19-21 Tightness check 21 Condensation connection 22 Electrical connection 22-23 Electrical connection diagram 23 Electrical circuit diagram 24 Before start up 25 Add refrigerant
REMKO MD Safety notes Carefully read this manual before starting the unit for the first time. They contain useful tips, information as well as hazard warnings to prevent injury or material damage. Non-observance of this manual may endanger persons, the environment as well as the equipment itself and will void any claims for liability. ■ ■ Do not operate equipment or components with obvious defects or signs of damage. ■ Store this manual as well as the refrigerant datasheet in the vicinity of the unit.
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. Schematic of exterior refrigerant circuit Liquefier fan M Reverse flow valve Connection Manometer The outdoor component serves to output the heat extracted by the indoor unit from the room being cooled.
REMKO MD 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 Display on indoor unit The indoor unit can also be started manually. After the air inlet screen has been opened, the inner recessed button can be pressed and automatic mode can be activated.
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. Dehumidifying mode In this mode the room is mainly dehumidified, the adjusted temperature is retained.
REMKO MD Button functions A symbol is shown on the display to indicate that the settings are being transferred. 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. ON/OFF button ON/OFF ON/OFF Auto SET TEMP SET TEMP SET TEMP Turbo Turbo The p/q buttons can be used to reduce and increase the desired nominal temperature. pq Buttons ON TIMER ON TIMER Hr. Hr.
In cooling mode, the air in the room is cooled down to the adjusted nominal 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, then the indoor unit starts to cool down the air in the room. The inverter controller checks the difference between the adjusted nominal temperature and the actual room temperature. In the event of a greater difference, a higher cooling performance is created.
REMKO MD HEATING Mode SET TEMP Turbo ON TIMER Hr. 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 nominal temperature, then the indoor unit starts to warm up the air in the room. The inverter controller checks the difference between the adjusted nominal temperature and the actual room temperature.
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. AIR CIRCULATION Mode Auto SET TEMP MODE FAN AIR CIRCULATION Turbo SET TEMP SET TEMP SET TEMP ON TIMER Off TIMER Hr. Turbo Turbo Auto Hr. ON TIMER ON FAN button SET TIMER The fan speed can be adjusted with this button. A selection can be made between low, medium, high and automatic fan speed. Hr. Hr.
REMKO MD SET TEMP Turbo TIMER button • Timer-On / OFF ON TIMER Hr. Off TIMER Hr. 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 activation or switch-off time for the display up to 9.
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. CAUTION Prior to performing any work, ensure the equipment is isolated from the voltage supply and secured to prevent accidental switch-on! 3. Switch off the voltage supply to the unit. Care 4.
REMKO MD Cleaning the housing of the indoor unit 1. Disconnect the supply voltage to the equipment. 2. Open the intake grille of the cover and fold it upwards. 3. Clean the guard using a soft, damp cloth. 4. Switch the supply voltage back on. 5. Any dirt can be cleaned off using lukewarm water and mild cleaning agents. In order to do so, turn the dirty side upward (Fig. 3). 6. If water is used, let the filter dry out properly in air before replacing it in the unit. 7. Carefully insert the filter.
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.
REMKO MD Problem display by blinker code Display Cause E1 Communication error between outdoor component and indoor unit Contact specialist firm Required action E3 Liquefier fan controller faulty Contact specialist firm E5 Sensor evaporator temperature faulty / short-circuited Contact specialist firm E6 Sensor air circulation faulty / short-circuited or sensor evaporator faulty / short-circuited Contact specialist firm H4 Operating limits of outdoor component or indoor unit exceeded Switch sy
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. Selection of the installation location Indoor 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).
REMKO MD Installation inside buildings ■ Ensure there is adequate heat dissipation when placing the outdoor component in cellars, attics, adjoining rooms or halls (Fig 4). ■ Install an additional fan with a rated flow comparative to that of the outdoor component being installed in the room.
Installation Connection variations of inner unit 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. Unit installation 1 2 3 1 2 3 4 max. 15 m Oil pump bend in suction pipe to outdoor component 1 x every 2.5 metres of rising pipe Installation should only be performed by authorised specialists.
REMKO MD Connection of refrigerant pipes 5. Verify that the shape of the flange is correct(Figure 8). The on site connection of the refrigerant pipes is made inside the unit. 6. First connect and hand-tighten the refrigerant connections to ensure they are correctly seated. It may be necessary to fit a reducer or flared adapter to the indoor unit. These fittings are included as standard. Once installed, the connections should be made tight against vapour diffusion.
Tightness check 12. Ensure that structure-borne sound is not transferred to parts of the building. Use vibration dampers to reduce the effects of structure-borne sound! 13. Prepare the refrigerant pipe for the outdoor component as described above. Supplementary information for Installation ■ ■ For the combination of the outdoor component with some indoor units, the connection of the refrigerant pipes may differ. In that case, install the provided reducer or expansion fittings to the indoor unit.
REMKO MD Condensation connection Electrical connection ■ Due to the dew point shortfall, condensation forms on the evaporator during the cooling operation and on the liquefier during heating operation. Below the evaporator is a catch pan, which must be connected with a drain. The lower part of the outdoor component housing is formed in the shape of a collection tray. The condensate connection included in the scope of delivery is to be attached here. ■ The condensation pipe should have a fall of min. 2 %.
CAUTION If an optionally available condensation pump is used on the unit, then - for the shut off contact of the pump - an additional relay to increase the switching power to shut off the compressor might be needed. ■ Check all plugged and clamped terminals to verify they are seated correctly and making a permanent contact. Re-tighten as required. Control cables should be screened if laid in areas exposed to strong magnetic fields. ■ Proceed as follows to connect the cable: 1.
REMKO MD Electrical circuit diagram MD 261-351 IT Vaporiser fan Swing motor Air circulation sensor Sensor Vaporiser W C R R Y Y/G Displayscreen Mains cable 230V / 1~ /50 Hz Auto Restart to outdoor component W Sensor OLP B CN16 B R C Sensor SL Sensor air inlet MD 261-351 AT Liquefier sensor Transformer Sensor Vaporiser Y/G CN15 U V W CN14 Y/G CN5 CN4 CN7 Y B Displayscreen A CN6 Fuse 1A 250V RY3 Thermostat 3 S R Crankcase heater L2 C 4 Y/G N-B Compressor CN3 R O Co
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 component (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.
REMKO MD 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.
Unit dimensions 280 MD 261 IT / MD 351 IT 215 815 MD 261 AT / MD 351 AT 270 590 760 290 530 Dimensional and design changes to advance technical progress are reserved.
REMKO MD Exploded view MD 261-351 IT 8 9 7 4 11 6 3 1 5 10 12 2 We reserve the right to modify the dimensions and constructional design as part of the ongoing technical development process. Spare parts list No.
Exploded view MD 261-351 AT 5 1 4 2 6 9 10 3 11 12 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 MD 261 AT MD 351 AT 1 Front panel 1109761 1109778 2 Fan blade, liquefier 1109762 1109779 3 Fan motor, liquefier 1109763 1109780 4 Liquefier 1109764 1109781 5 Cover panel 1109765 1109782 6 Side part 1109766 1109783 7 Compressor, cpl.
REMKO MD Technical data Series MD 261 Operating mode MD 351 Inverter-wall room air conditioner combination for cooling and heating Nominal cooling output 1) kW 2.68 (0.82 to 3.41) 3.56 (1.05 to 4.53) Nominal heating output kW 2.96 (0.98 to 3.64) 3.86 (1.14 to 4.78) A A 4,25 3,75 2) Energy efficiency class, cooling 1) Energy efficiency ratio EER 1) Energy efficiency class, heating 2) Coefficient of performance COP 2) Operating range (room volume), approx.
Notes 31
REMKO across Europe … and in your area! Profit from our experience and advice Consultancy Intensive training means our consultants are always up-to-date with the latest developments. This has given us the reputation of being more than just a good and reliable supplier: REMKO, a partner who helps solve problems. Sales REMKO not only has a wellestablished sales network at home and abroad, it also employs highly trained sales specialists.
