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190TGB-1034

© Munters Europe AB 2002

ML/MLT

180-350

User’s Manual

Desiccant Dehumidifier
ML180-MLT350

Effective for units manufactured from week 46, 2002

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Summary of Contents for ML180

Page 1: ...190TGB 1034 Munters Europe AB 2002 ML MLT 180 350 User s Manual Desiccant Dehumidifier ML180 MLT350 Effective for units manufactured from week 46 2002 ...

Page 2: ......

Page 3: ... Electrical Specifications 14 2 13Pre Start settings 15 2 13 1 One step humidistat 15 2 14Pre Start Checks 15 2 15Airflow Check and Adjustment 16 2 15 1 General 16 3 Operation 3 1 General 18 3 2 Safety 18 3 3 Emergency stop 18 3 4 Pre Start Checks 18 3 5 Operating the unit 18 3 5 1 Manual Mode 18 3 5 2 Automatic Mode Humidistat 19 3 5 3 Automatic Mode RH98 19 3 6 Control Panel 20 4 Maintenance 4 1...

Page 4: ...em for information retrieval or be transmitted in any form in any manner without Munters written consent Please send any comments regarding the content of this publication to Munters Europe AB Dehumidification Division Technical Publications PO Box 434 SE 191 24 Sollentuna Sweden Tel 46 8 626 63 00 Fax 46 8 626 86 18 Munters Europe AB 2002 Safety In this publication hazardous activities are indica...

Page 5: ...he user to understand the unit s construction and function and as to serve as a guide during installation operation maintenance and basic fault finding that generally can be carried out before contacting Munters Product Service 1 3 Safety and Cautions The contents of this manual include suggested best working practices and procedures These are issued for guidance only they do not take precedence o...

Page 6: ...gh an illuminated indicator on the control panel see figure 3 1 Alarms related to air relative humidity are indicated in the display of the RH98 if fitted operators panel see section 7 4 RH98 GB CHANGE FILTER GB CHANGE FILTER GB CHANGE FILTER GB CHANGE FILTER 1 2 3 4 5 6 6 3 2 4 5 Type ML420 Fabr No 0214 190XXX XXXXX 3 400V 50Hz 370W 42 kW Max 4 57kW Munters Europe AB M IP44 1 GB CHANGE FILTER SW ...

Page 7: ... or frequency other than that for which is was designed and manufactured Refer to the unit identification plate if in doubt WARNING Ensure that the mains power is isolated from the dehumidifier prior to changing the orientation of the process and dry air connections CAUTION The wet air ducting must always be insulated if there is a risk of freezing Due to the high moisture content in the wet air l...

Page 8: ...ng is damaged 2 Contact Munters immediately if delivery is not complete in order to avoid installation delays 3 If the unit is to be put into storage prior to installation see section 2 5 Storing the Equipment NOTE If the installation is not to be carried out immediately after the arrival of the equipment it is advisable to leave the packing material in place on the dehumidifier or to re use the p...

Page 9: ...ir may be situated either on the left or right side of the unit ML Series dehumidifiers are delivered with the process and dry air connections on the left side of the unit If it is required to the change the orientation so that the connections are on the right side of the unit proceed as follows WARNING Ensure that mains power is isolated from the dehumidifier prior to changing the orientation of ...

Page 10: ...ugh which the ductwork is routed The ducting must always be insulated when there is a risk of freezing The wet air leaving the dehumidifier will due to high moisture content condense on the inside duct walls This must be avoided by insulating the ducts Horizontal duct runs should be installed sloping downwards away from the dehumidifier to allow for condensate drainage On the wet air outlet ductin...

Page 11: ...ust be located at least 2m from the air outlet for wet air Refer to figure 2 4 Outdoor air inlet design 2 8 3 Ductwork for Wet Air Outlet Wet air ducting should be manufactured in corrosion resistant material e g stainless steel aluminium or plastic and should be capable of withstanding temperatures of up to 100 C CAUTION The wet air ducting must always be insulated if there is a risk of freezing ...

Page 12: ...nt air with a very high relative humidity from inadvertently being drawn through the rotor by a chimney effect created by ancillary equipment This is particularly important when the process air is drawn from outdoors or the system has been fitted with a pre cooler Failure to observe these precautions could result in a serious loss of performance and may cause permanent damage to the rotor Rectangu...

Page 13: ...the environment is partially sealed the operating costs for the dehumidifier will also be minimised ML Munters 420 ML Munters 420 Open airflow systems can be utilized in place of closed systems to overcome the following problem areas High level of dust or corrosive particles in the room Harmful gasses or vapours which must not be recirculated Problems arranging air recirculation where several room...

Page 14: ...he unit must be adequately connected to earth ML270 only The power supply cables must be of the correct size for the dehumidifier being installed For connection details refer to the identification plate and Electrical Circuit Supplement or refer to section 6 5 Technical Specifications 2 12 External Humidistat ML Series dehumidifiers are pre wired so that when the unit is in the AUTomatic mode it c...

Page 15: ...a one step humidistat is fitted the dehumidifier will switch on and off under the control of the humidistat The one step humidistat is connected in accordance with the Circuit Diagram Supplement 2 14 Pre Start Checks Before starting the dehumidifier for the first time ensure that the mains power supply is isolated from the dehumidifier and carry out the following checks 1 Check that the Mode switc...

Page 16: ... performance the dry air and reactivation airflow dampers must be correctly adjusted in accordance with the rated airflow see section 6 5 Technical Specifications If required contact Munters Product Service to receive help with commissioning the dehumidifier installation see addresses on the back cover of this manual for your local Munters representative CAUTION Failure to correctly adjust the pro...

Page 17: ...lowing the temperature display to stabilise after each adjustment until reactivation temperature reading is within the specified tolerances Figure 2 8 Airflow Chart 140 20 120 100 40 60 80 60 40 20 0 ti C t u C Symbols ti Inlet air temperature C tu Reactivation air temperature C Example Inlet air temperature ti 15 C Reactivation air temperature 110 C Temperature increase 95 C ...

Page 18: ...tivations airflows could cause the unit to malfunction 3 3 Emergency stop ML180 MLT350 To start and stop the unit in normal operation the Run Stop switch is used In case of an emergency unplug the unit from the wall outlet ML270 To start and stop the unit in normal operation the Run Stop switch is used In case of an emergency switch the unit off using the external isolator if fitted 3 4 Pre Start ...

Page 19: ...m where the humidistat is installed 5 Operate the run stop switch to the position and check that the unit stops and that the unit running indicator goes out 6 Reset the humidistat to the desired set point For details on the Control panel see figure 3 1 Control Panel 3 5 3 Automatic Mode RH98 If the unit has been supplied with a factory fitted RH98 control system option the external transmitter mus...

Page 20: ...stop switch is operated to the position With the switch in the AUTO position the dehumidifier will operate in the automatic mode In this mode a humidistat or RH98 must be connected to the unit When the run stop switch is operated to the position the humidistat or RH98 determines when the dehumidifier will start and stop 3 Power Connected Indicator Indicates that mains power is connected to the deh...

Page 21: ...ives on the back cover of this manual 4 2 Safety WARNING Adjustments maintenance and repairs may only be carried out by qualified personnel who are aware of the risks involved during the maintenance of equipment containing high electrical voltage and high machine temperatures 4 3 Maintenance Schedule The following maintenance schedule is recommended by Munters and covers procedures for inspection ...

Page 22: ...mage or over heating Rotor and sealing Check for overheating and clogging Remove dust accumulation on the frontal area of the rotor if necessary Check the seals for damage or wear Check for overheating and clogging Remove dust accumulation on the frontal area of the rotor if necessary Use a vacuum cleaner not compressed air Check the seals for damage or wear Electrical panel and cables Inspect the...

Page 23: ...carried out by Munters recommended and trained personnel The changing of reactivation heater must be carried out by Munters recommended and trained personnel Drive belts and fans can be changed for one of the same type After a fan has been changed the airflow must be adjusted and an operational test must be carried out Switches and sensors can be changed to one of a corresponding type After a chan...

Page 24: ...an fault or reactivation heater fault ML270 Circuit Breaker QM12 tripped due to a drive motor or fan motor fault Circuit Breaker QM15 tripped due to a reactivation heater fault Air cooled condenser models ML180 MLT350 Circuit Breaker QM12 tripped due to a drive motor fan fault condenser fan fault or a condenser heater fault ML270 Circuit Breaker QM12 tripped due to a drive motor fan fault condense...

Page 25: ... marking specifications 6 2 Principal of operation The desiccant rotor structure comprises of a large number of narrow and parallel air channels processed to a composite material that is highly effective at attracting and holding water vapour The rotor is exposed in sectors to different airflows The airflow that is to be dehumidified is called process air and passes through the largest sector of t...

Page 26: ... B C ØD ØE F G H J L M N P X1 Y1 ML180 513 410 910 125 80 220 170 500 135 170 250 45 175 450 400 56 MLT350 513 410 910 125 80 220 170 500 135 170 250 45 175 450 400 56 ML270 513 410 1010 160 100 220 170 600 135 170 250 450 175 450 400 63 1 Access space required for servicing Table 6 1 Dimensions and service space s 420 ML Munter 145 110 249 165 145 110 B J Y C P M L 1 2 ØD N X A N 4 ØE 3 F H G P 1...

Page 27: ...Munters DryCap program NOTE The below figures are based on a nominal 1 1 airflow Figure 6 3 Capacity Diagrams 5 0 1 0 2 0 3 0 4 0 ML180 5 10 15 20 25 5 0 1 0 2 0 3 0 4 0 ML270 5 10 15 20 25 5 0 1 0 2 0 3 0 4 0 MLT350 5 10 15 20 25 1 Process air temperature C 2 Process air relative humidity RH 3 Dehumidification capacity kg h moisture removal kg hour 80 RH 60 RH 40 RH 80 RH 60 RH 40 RH 80 RH 60 RH ...

Page 28: ...ps Phase 3 50Hz 400V Current Amps Phase 3 50Hz 415V Current Amps Phase 3 60Hz 440V Current Amps Phase 3 60Hz 460V Current Amps Phase 3 60Hz 480V Current Amps Phase 3 50Hz 500V 9 9 9 9 9 5 9 2 8 5 8 5 8 2 8 1 5 0 5 0 4 7 4 6 4 3 4 1 4 0 3 8 9 9 9 5 9 2 Reactivation Heater Temperature increase across heater C Reactivation heater power kW 95 1 8 95 2 7 95 1 8 Miscellaneous Data Drive Motor Power W Ai...

Page 29: ... 12 13 14 15 16 17 1 Fan Motor 2 Process Impeller 3 Reactivation Impeller 4 Process Filter 5 Reactivation Filter 6 Rotor 7 Rotor Cover Upper 8 Rotor Cover Lower 9 Rotor Sealing Ring 10 Roller Belt Guide 11 Drive Belt 12 Reactivation Heater 13 Drive motor 14 Pulley Belt Drive 15 Switch rocker 2 pole 16 Temperature Indicator 17 Electrical Control Panel ...

Page 30: ... than 20V a separate relay controlled by the humidistat must be used 7 2 Configuration alternatives This appendix includes information about all configurations and components that can be added when ordering ML dehumidifiers 7 3 Running Time meter The running time meter indicates accumulated number of hours the dehumidifier has been in dehumidifying operation The two digits to the right indicated p...

Page 31: ...simultaneously or buttons in order to set the required setpoint 4 Release SET button and display starts to flash indicating the new setpoint before it returns automatically to normal i e displaying current relative air humidity 7 4 3 Display change of other parameters The control setpoint is pre set at the factory to 50 RH In addition to the setpoint a number of internal settings are also possible...

Page 32: ...H 2 RH1 1 RH 6 RH2 1 RH 14 15 OFF ON interval alarm output Offset from set point alarm output 1 15 RH 15 15 RH 1 RH 0 RH 30 31 32 33 34 35 36 37 Alarm limit type Absolute limit or relative to set point Minimum alarm limit Maximum alarm limit Delay for minimum alarm Delay for maximum alarm Function of alarm output Reset alarm when the cause of alarm is rectified Reset alarm when SET button is press...

Page 33: ...he current relative air humidity alternately The function of the reset depends on the settings of parameters see table 7 1 Sensor calibration The humidity transmitterís read off value can be calibrated with the Operator Panel s Sensor Offset parameter 05 see table 7 1 e g 3 RH too much the offset needs to be decreased with 3 For calibration of the humidity transmitter please contact Munters Produc...

Page 34: ...ML180 MLT350 Dehumidifiers 34 7 Appendix 1 Options 190TGB 1034 A ...

Page 35: ......

Page 36: ...TOKYO 174 Tel 81 0 3 5970 0021 Fax 81 0 3 5970 3197 KOREA Munters SEOUL Tel 82 0 2 552 8770 Fax 82 0 2 552 8772 MEXICO Munters de Mexico S A de C V GUADALUPE N L Tel 52 9 8 327 5990 to 93 Fax 52 9 8 327 5994 NETHERLANDS Munters Vochtbeheersing ALPHEN a d RIJN Tel 31 0 172 43 32 31 Fax 31 0 172 44 29 60 NEW ZEALAND Munters Pty Ltd AUCKLAND Tel 64 96 34 8241 Fax 64 96 34 8237 POLAND Munters Poland S...

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