REMKO RXT 1051DC Operation Manual Download Page 3

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Contents

Read these operating instructions carefully
before commissioning / using the device!

These instructions are an integral part of the system and must always
be kept in the vicinity of the installation location or on the unit itself
This operating manual is a translation of the German original.

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

Safety notes

Environmental protection and recycling

Warranty

Intended use

Transport and packaging

System description

Operation

6-12

Decommissioning

Care and maintenance

13-14

Installation instructions for qualified personnel

15-18

Installation

18-20

Leak testing

Condensate connection and safe drainage

Electrical connection

22-23

Electrical connection diagram

Electrical drawings

24-27

Before commissioning

Adding refrigerant

Commissioning

28-31

Troubleshooting and customer service

32-48

Unit dimensions

Diagram of the unit

50-51

Spare parts lists

50-51

Technical data

52-53

EC-Declaration of conformity

Made by REMKO

Summary of Contents for RXT 1051DC

Page 1: ...Edition GB D01 REMKO RXT DC RXT 351DC RXT 521DC RXT 681DC RXT 1051DC RXT 1401DC Inverter wall ceiling mounted unit with split design Operation Technology Spare parts ...

Page 2: ......

Page 3: ... recycling 4 Warranty 4 Intended use 4 Transport and packaging 5 System description 5 Operation 6 12 Decommissioning 13 Care and maintenance 13 14 Installation instructions for qualified personnel 15 18 Installation 18 20 Leak testing 20 Condensate connection and safe drainage 21 Electrical connection 22 23 Electrical connection diagram 23 Electrical drawings 24 27 Before commissioning 28 Adding r...

Page 4: ... permitted and can cause malfunctions Units and components may not be operated in areas where there is an increased risk of damage Observe the minimum clearances The electrical supply is to be adapted to the requirements of the units The operational safety of the units and components is only assured if they are fully assembled and used as intended Safety devices may not be modified or bypassed Do ...

Page 5: ...ntrol The outdoor component consists of a refrigerant circuit with compressor fin condenser condenser fan reverse flow valve and electronic expansion valve RXT 521 1401DC The outdoor component is controlled by the controller in the indoor unit The indoor unit consists of a fin vaporiser vaporiser fan controller and condensation pan Floor consoles wall consoles refrigerant pipes wired remote contro...

Page 6: ...risk of leakage It is recommended that the batteries are removed if the equipment is shut down for long periods NOTE Manual mode The indoor units can be started manually Press the RESET key on the receiver unit of the cover to activate automatic mode In manual mode the following settings apply Cooling mode 24 C Fan speed AUTO Heating mode 26 C Fan speed AUTO Pressing any key on the infra red remot...

Page 7: ...y Use this key to select the operating mode The indoor unit has 4 modes 1 Automatic mode In this mode the unit works in cooling or in heating mode 2 Cooling mode In this mode the warm room air is cooled to the desired temperature 3 Dehumidification mode In this mode the room is mainly dehumidified and the selected temperature is maintained 4 Heating mode In this mode the warm air in the room is he...

Page 8: ...essing the ON OFF key The programmed settings and settings from before the unit was turned off will appear on the display ON OFF Key ON OFF ON OFF A symbol is shown on the display to indicate that the settings are being transferred Key functions Remote control display Indicator arrows will point to the corresponding settings Display on the indoor unit Fan speed Temperature display Cooling mode Aut...

Page 9: ... mode the controller autonomously selects between heating circulation or cooling mode based on the room temperature Tr and the selected target value Ts The target value can be adjusted between 17 C and 30 C by means of the keys Fan speed is selected automatically AUTOMATIC MODE AUTOMATIC MODE Operating sequence If Tr is 1K less than Ts then operating mode Heating is selected If Tr is 2K greater th...

Page 10: ...oom If the set room temperature is exceeded by approx 1 C the controller will switch off heating mode To protect the compressor the controller will wait 3 minutes before switching on the heating mode again MODE HEATING MODE COOLING mode In cooling mode the air in the room is cooled down to the selected target temperature The desired room temperature is set with the keys in 1 C increments If the ro...

Page 11: ... temperature in cooling mode by 1 C after one hour and by 2 C after 2 hours In heating mode the target temperature is decreased by 1 C after one hour by 2 C after 2 hours The unit switches off automatically after 8 hours TIMER Key The activation and switch off time can be programmed with this key The timer is activated or and the clock display is switched off by pressing the Timer On or Timer Off ...

Page 12: ...ulate the horizontal and vertical distribution of air Moving internal parts e g fans have the potential to cause injury during operation Do not make any modifications by hand CAUTION Manual air distribution Horizontal and vertical swing motor Timer On Timer On 3 sec TIMER ON Key 3 sec TIMER OFF Key Timer Off Timer Off REMKO RXT DC 12 ...

Page 13: ...use any caustic abrasive or solvent based cleaning products Do not use a jet of water Clean the fins on the indoor unit and outdoor component prior to long shutdown periods Maintenance We recommend concluding a maintenance contract with annual service from an appropriate specialist company For systems which operate year round e g in server rooms the maintenance intervals must be reduced accordingl...

Page 14: ...n the air filter at intervals of no more than 2 weeks Reduce this interval in case of continuous operation or heavily soiled air Cleaning the filter 1 Disconnect the power supply to the unit 2 Open the front side of the unit by folding the grill down forwards 3 Pull the filter out in an upwards direction Fig 1 4 Clean the filter with an ordinary vacuum cleaner Fig 2 To do so turn the dirty side up...

Page 15: ...ion near sources of thermal radiation reduces the output of the unit Only open the shut off valves of the refrigerant pipes after installation is complete Seal off open refrigerant pipes with suitable caps or adhesive strips to avoid infiltration of moisture and never kink or compress the refrigerant pipes Avoid unnecessary bends This minimises the pressure loss in the refrigerant pipes and ensure...

Page 16: ...ket to the wall or fixed by a floor bracket to the ground Minimum clearance to snow 20 cm Snow Windbreak Wind Lines in the wall opening Control cable Condensate line Injection line Suction line PVC pipe 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 Sun The condenser on the outdoor component gives off heat Expos...

Page 17: ...ances to allow access for maintenance and repair work and facilitate optimum air distribution RXT 351DC AT RVT 521 1401DC AT A 300 mm B 2000 mm C 600 mm D 200 mm E 400 mm Warm air Cold fresh air Lightwell shaft Outdoor component Warm air Lightwell shaft Additional fan 4 Installation inside buildings Minimum clearances All dimensions are given in mm E C B A D Air intake Air outlet Oil return measur...

Page 18: ...em shortly before connecting the refrigerant pipes Establish all electrical connections connections in accordance with the relevant DIN and VDE standards Always ensure the electrical cables are properly connected to the terminals Otherwise there is a risk of fire Installation materials The interior unit is attached to the wall using a wall bracket and 4 screws provided by the customer 4 key head s...

Page 19: ... points on the structurally permissible building sections according to the dimensions of the ceiling bracket 2 Remove the housing s break out opening if necessary 3 Hook the unit onto the four previously installed screws threaded rods 4 Fit the unit such that it is attached 5 mm lower in the connection area air intake than on the air outlet side 5 Connect the refrigerant pipes electrical cables an...

Page 20: ...he effects of structure borne sound 13 Prepare the refrigerant pipes for the outdoor component as described above A vacuum of at least 20 mbar must be produced CAUTION The time required to generate the vacuum is dependent on the volume of the pipework in the indoor unit and the length of the refrigerant pipes However the process will always take at least 60 minutes Once any foreign gases and humid...

Page 21: ...efrigerant pipes electrical cables and condensation pipe to the indoor unit as described below Condensate connection If the temperature falls below the dew point condensation will form on the finned condenser during heating mode Below the register is a collection tray which must be connected to a drain The condensate line should have a fall of min 2 This is the responsibility of the customer Fig 1...

Page 22: ... supplied to the outdoor component the indoor unit is supplied through the control cable between the outdoor component and the indoor unit The terminal blocks for making the connections are located inside the unit If an optional condensation pump is used in conjunction with the unit it may be necessary to install an additional relay with a higher contact rating after the switch off contact on the ...

Page 23: ...s cable 230 V 50 Hz L1 N PE Neutral conductor Exterior conductor Earth conductor Data cable L1 S S N N Pe Pe L1 N Pe L1 Indoor unit Note The socket A E under the panel is for connecting a Remko type KFB 2 cabled remote control Terminals X Y E are not assigned The enclosed fixed resistor is not required Connecting the RXT 1051DC Pe Pe Pe N N N L1 L1 L1 L2 L2 L3 L3 Outdoor component Indoor unit P P ...

Page 24: ...CN 1 S SW1 M M M CN 11 CN 14 CN 12 Vaporiser sensor Display indicator Vertical swing motor Horizontal swing motor Fan motor Condenser fan Switching valve Not assigned Not assigned Transformer Compressor Air intake sensor Hot gas sensor Excessive tem perature compressor Klixon Condenser sensor DIP switch SW1 Position Temp 1 on 6 2 on 1 on 4 2 off 1 off 2 2 on 1 off 0 2 off M L N S M To outdoor comp...

Page 25: ... sensor Condenser sensor Elec expansion valve RXT 521DC IT RXT 521DC AT Mains cable 230V 1 50 Hz Vertical swing motor Horizontal swing motor To outdoor component Control cable to outdoor component Control cable to indoor unit Not assigned L N Pe High pressure switch Low pressure switch CN14 CN3 CN15 CN1 P 1 P 3 P 4 P 5 P 6 P 2 CN13 CN12 CN5 CN7 CN6 CN4 CN8 CN10 CN9 CN2 CN 6 L N CN 4 CN27 CN27 CN1 ...

Page 26: ...ensor temperature condenser 1 CN 20 P1 CN 3 CN 15 CN 4 CN 13 CN 9 CN 7 CN 12 CN 6 CN 50 CN 19 CN 16 CN 14 1 2 3 CN 18 CN 11 CN 7 L N Pe Fan motor Transformer To outdoor unit Vertical swing motor optional Horizontal swing motor Control cable to outdoor component Not assigned Air circulation sensor Centre vaporiser sensor Outlet vaporiser sensor Cabled remote control socket A E Power board Inductor ...

Page 27: ...Condenser fan Crankcase heater T5 hot gas sensor T3 condenser sensor T4 air intake sensor Elec expansion valve High pressure switch Low pressure switch Transformer 1 1 Air circulation sensor CN 20 Transformer P1 CN 3 CN 15 CN 4 CN 13 CN 9 CN 7 CN 12 CN 6 CN 50 CN 19 CN 16 CN 14 Fan motor 1 2 3 CN 18 CN 11 CN 7 Centre vaporiser sensor Outlet vaporiser sensor Vertical swing motor optional Horizontal...

Page 28: ...401 DC IT Control cable to indoor unit Main board IPM board Power board Mains cable 400V 3 50 Hz Compressor Condenser fan 1 Crankcase heater T5 hot gas sensor T3 condenser sensor T4 air intake sensor Elec expansion valve High pressure switch Low pressure switch Trans former 1 4 way valve Condenser fan 2 Trans former 2 RXT 1401 DC AT Cabled remote control socket A E To outdoor component Vertical sw...

Page 29: ...ON NOTE Check the refrigerant fill quantity in the event of overheating Wear protective clothing when handling refrigerant CAUTION Commissioning Commissioning should only be performed and documented by specially trained personnel NOTE Once all the components have been connected and tested the system can be commissioned A functional check should be performed to verify its correct function and ident...

Page 30: ...on tray A bottle with a spout is recommended for pouring the water into the condensation tray 9 Switch the indoor unit to cooling mode 10 Check the correct function and settings of all control and safety devices during the test run 11 Check the control system in the indoor unit using the functions described in the operating manual Timer temperature settings and all mode settings NOTE Press the TES...

Page 31: ...0 60 Display OC mode 0 Standby 2 Cooling mode 3 Heating mode 4 Forced cooling Display Fan mode 0 Off 1 Low speed 2 High speed Display Cooling output 1 2 0 2 5 kW 2 2 5 3 0 kW 3 3 0 3 8 kW 4 3 8 5 0 kW 5 5 0 5 5 kW 6 5 5 6 1 kW Display Temperature 10 35 40 C 11 40 45 C 12 45 50 C 13 50 55 C 14 55 60 C 15 60 65 C 16 65 70 C Display Temperature 15 7 5 C 20 5 0 C 25 2 5 C 30 0 C 35 2 5 C 40 5 0 C 45 7...

Page 32: ...r unit in the shade Electromagnetic fields are interfering with transmission Does it function after removing potential sources of interference Signal is not transmitted when interference sources are operational Key on remote control jammed two keys pressed at same time Does the Transmitting symbol appear on the display Release the key only press one key Batteries in remote control are flat Have ne...

Page 33: ...tch has triggered Check refrigerant pressure P3 Compressor power consumption too high Check compressor power consumption P4 Hot gas temperature over 105 C Clean condenser check refrigerant circuit P5 Condenser temperature over 65 C Clean condenser check refrigerant circuit P6 Voltage protection OC main board Check voltage Flashes rapidly Flashes rapidly Air circulation condenser sensor tripped Che...

Page 34: ...t and outdoor component properly connected Connect the cable properly Is the cable connecting the indoor unit and outdoor component damaged Replace the cable Replace the main board for the indoor unit or outdoor component Is the resistance of the temperature sensor OK black cable Table 1 P92 94 No Replace temperature sensor Replace indoor unit main board Yes 2 Defrost light flashes at 5 Hz fault o...

Page 35: ...king properly again No Are the connections from the circuit board to the compressor OK Yes No Correct connections Are the windings of the compressors OK Yes Replace circuit board No Replace compressor No Does the unit run after replacing the compressor Check the unit s electrical supply Is it properly connected Yes No No Connect the electrical supply properly Are all the circuit board s electrical...

Page 36: ...greater than 16A Is the function of the fan on the outdoor component OK Replace outdoor component main board Resistance of the sensor OK Table 1 P92 94 No Yes Replace outdoor component main board Is the voltage between L and N of the outdoor component 198 254V Yes Replace main board No Establish correct power supply Check refrigerant pipes Is the outdoor temperature too high Switch off unit Yes No...

Page 37: ...k Is the connection between the Klixon and circuit board OK Is the resistance value for the Klixon correct Table 2 P95 No Replace Klixon Yes Replace outdoor component main board Is the resistance of the vaporiser sensor OK Table 1 P92 94 Replace temperature sensor No 1 Operation light flashes at 5 Hz fault on the vaporiser sensor or room sensor Yes Is the resistance of the room sensor OK Table 1 P...

Page 38: ...nd then back on again Is fault still present Switch the unit off an then back on again Yes 3 Alarm light flashes at 1Hz check for fault on condenser temperature sensor or for improper function of outdoor component for E4 P1 and P2 Yes No Correct sensor line Connection of sensor line OK Replace temperature sensor Yes No Resistance of the sensor OK Table 1 P92 94 Replace outdoor component main board...

Page 39: ... high See page 41 point 9 P5 Condenser outlet sensor triggered See page 41 point 10 P6 IPM power board safety shutdown See page 42 point 11 Fault displays shown on the outdoor component RXT 521 1401DC outdoor component fault analysis 1 Fault code E0 EEPROM error No Fit EEPROM properly Is the EEPROM fitted properly Yes Replace outdoor component main board 2 Fault code E2 communication error between...

Page 40: ...re a measurement of 277 345V between CN12 and CN13 on the power board Yes Replace IPM module No Replace power board No Establish a proper connection Yes No Yes 4 Fault code E4 fault on outside temperature sensor T4 or condenser sensor T3 Connect condenser sensor properly Is the condenser sensor properly connected Replace sensor Measure the resistance of the sensor Table 1 P92 94 Resistance OK No Y...

Page 41: ...sure switch Yes Switch off unit No Yes Is the outdoor temperature too high Check refrigerant pipes Is the function of the fan on the outdoor component OK No No Ensure fan functions properly Clean the register of the outdoor component Yes Is the register of the outdoor component dirty Siphon off refrigerant replace pipe remove blocked perform pressure test drawn vacuum and refill Yes Are the refrig...

Page 42: ...tch off unit No Yes Is the outdoor temperature too low Check refrigerant pipes The refrigerant pipes may be leaking No Check the refrigerant pipes with leak detection spray or an electronic leak detector Yes Check the refrigerant pressure with a manometer Is the refrigerant pressure less than 1 4 bar Refrigerant pipe may be blocked No Siphon off refrigerant replace pipe remove blocked perform pres...

Page 43: ... Yes Yes Is the function of the fan on the outdoor component OK No Ensure fan functions properly Is the register of the outdoor component dirty Are the refrigerant pipes blocked or bent Yes Siphon off refrigerant replace pipe remove blocked perform pressure test drawn vacuum and refill Clean the register of the outdoor component No Replace outdoor component main board No Yes No 43 ...

Page 44: ...on No 10 Fault code P5 condenser outlet sensor triggered Is the condenser outlet temp greater than 65 C Yes Clean condenser register Is the outdoor temperature too high Yes Switch off unit No Replace sensor Check the resistance of the sensor Table 1 P92 94 Is the resistance OK Yes Replace outdoor component main board No Replace outdoor component main board No Is the condenser register dirty Are th...

Page 45: ...d the two AC contacts Is the resistance for the two measurements 0Ω Are the connecting cables to the chokes OK Is the resistance of the connecting cables Check the fuses on the power board Are they working OK Replace the power board Yes Is the connection between the main board and IPM module OK No Is the connection to the compressor OK Establish a proper connection Yes No Establish a proper connec...

Page 46: ...5 16 769 16 079 15 406 16 15 949 15 313 14 691 17 15 174 14 588 14 014 18 14 442 13 902 13 372 19 13 748 13 251 12 762 20 13 093 12 635 12 183 21 12 471 12 050 11 634 Temp Resistance kΩ C Rmax R t Normal Rmin 22 11 883 11 496 11 112 23 11 327 10 971 10 617 24 10 800 10 473 10 147 25 10 300 10 000 9 700 26 9 848 9 551 9 255 27 9 418 9 125 8 834 28 9 010 8 721 8 434 29 8 621 8 337 8 055 30 8 252 7 9...

Page 47: ... 1 191 1 108 80 1 235 1 151 1 070 81 1 195 1 113 1 034 82 1 156 1 076 0 999 83 1 118 1 041 0 966 84 1 082 1 007 0 934 85 1 047 0 974 0 903 86 1 014 0 942 0 874 87 0 982 0 912 0 845 88 0 951 0 883 0 818 89 0 921 0 855 0 791 90 0 892 0 828 0 766 91 0 864 0 802 0 742 92 0 838 0 777 0 719 93 0 812 0 753 0 696 94 0 787 0 730 0 675 95 0 763 0 708 0 654 96 0 740 0 686 0 634 97 0 718 0 666 0 615 98 0 697 ...

Page 48: ...7 086 121 2 061 4 222 8 38 31 62 80 6 859 122 2 007 3 211 4 39 30 36 81 6 641 123 1 955 2 200 7 40 29 15 82 6 43 124 1 905 1 190 5 41 28 83 6 228 125 1 856 0 180 9 42 26 9 84 6 033 126 1 808 1 171 9 43 25 86 85 5 844 127 1 762 2 163 3 44 24 85 86 5 663 128 1 717 3 155 2 45 23 89 87 5 488 129 1 674 4 147 6 46 22 89 88 5 32 130 1 632 5 140 4 47 22 1 89 5 157 6 133 5 48 21 26 90 5 7 127 1 49 20 46 91...

Page 49: ...DC AT D RXT 351DC IT RXT 521DC IT RXT 681DC IT RXT 1051DC AT RXT 1401DC AT A 990 990 990 1280 1670 B 660 660 660 660 680 C 206 206 206 206 245 B All dimensions are given in mm All dimensions are given in mm RXT 351DC AT RXT 521DC AT RXT 681DC AT RXT 1051DC AT RXT 1401DC AT A 760 845 895 990 940 B 530 560 590 600 600 C 290 335 335 375 375 D 280 325 335 355 340 E 590 700 860 965 1245 49 ...

Page 50: ...outlet fins set 1111511 1111511 1111511 1111512 1111542 6 Condensation tray 1111513 1111513 1111513 1111514 1111543 7 Vaporiser 1111515 1111516 1111517 1111518 1111544 8 Fan wheel 1111519 1111520 1111521 1111522 1111545 9 Fan motor 1111523 1111524 1 1111525 1 1111573 1111546 10 Control board 1111527 1111528 1 1111529 1 1111574 1111547 1 11 Air circulation sensor 1111531 1111531 1111531 1111531 111...

Page 51: ...6 Side part 1111000 1111001 1109843 1111591 1111615 7 Compressor cpl 1111002 1111003 1109844 1111649 1111653 8 Shut off valve suction line 1111004 1111005 1109820 1111595 1111617 9 Shut off valve injection line 1111006 1111007 1109821 1111597 1111618 10 Reverse flow valve 1111008 1111009 1109823 1111599 1111619 11 Control board 1111010 1111011 1109861 1111650 1 1111654 12 Condenser compressor 1111...

Page 52: ...5 8 15 90 5 8 15 90 5 8 15 90 Max operating pressure kPa 4200 2500 Data specific to indoor unit RXT 351DC IT RXT 521DC IT RXT 681DC IT RXT 1051 DC IT RXT 1401DC IT Setting range for room temperature C 17 to 30 Operating range C 17 to 32 Air flow volume per speed setting m h 460 520 580 500 600 800 960 1080 1150 1000 1200 1400 1600 1800 2000 Sound pressure level per speed setting 3 dB A 33 37 40 38...

Page 53: ... 00 7 50 8 00 8 50 5 00 1 50 2 00 2 50 3 00 0 90 0 95 1 00 Leistungsa ufnahme Heizleistun g Außentemperatur 4 50 0 3 6 9 12 15 11 9 6 3 15 18 Elec power consumption Heating output 1 Outdoor temperature 14 00 2 50 3 00 3 50 4 00 0 90 1 00 2 00 Leistungsa ufnahme Heizleistun g Außentemperatur 13 00 12 00 11 00 10 00 9 00 8 00 7 00 6 00 0 3 6 9 12 15 11 9 6 3 15 18 1 Air intake temperature TK 20 C ou...

Page 54: ...ry model Air conditioner combination with split design Series Designation REMKO RXT 351 DC RXT 521 DC RXT 681 DC RXT 1051 DC RXT 1401 DC Series Class Number 1034 1035 1036 1037 1038 Applicable regulations Machinery Directive 2006 42 EC Machine directive Low voltage Directive 2006 95 EC Low voltage directive EMC Directive 2004 108 EEC EMC Directive Energy Consumption Labelling Directive 92 75 EEC E...

Page 55: ...55 ...

Page 56: ...staff are more than just sales representatives above all they must act as advisers to our customers in air conditioning and heating technology Customer Service Our units operate precisely and reliably However in the event of a fault REMKO customer service is quickly at the scene Our comprehensive network of experienced dealers always guarantees quick and reliable service REMKO INTERNATIONAL and ri...

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