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Summary of Contents for Munters MLT350
- Page 1 ML/MLT User’s Manual 180-350 Desiccant Dehumidifier ML180-MLT350 Effective for units manufactured from week 46, 2002 190TGB-1034 © Munters Europe AB 2002...
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Page 3: Table Of Contents
ML180-MLT350 Dehumidifiers Contents Important user information 5 Fault Finding ......4 5.1 General ............23 1 Introduction 5.2 Safety............23 5.3 Exchangeability..........23 1.1 General ............5 5.4 Fault localization ..........23 1.2 About this manual ..........5 1.3 Safety and Cautions ........5 6 Product Design Information 1.4 Markings ............6... -
Page 4: Important User Information
ML180-MLT350 Dehumidifiers Important user information Intended use of equipment Safety Munters dehumidifiers are intended to be used In this publication hazardous activities are for the dehumidification of air. All other uses of indicated and preceded by the common hazard the equipment, or use which is contrary to the symbol. -
Page 5: Introduction
Munters dehumidifiers are designed to efficiently dehumidify air. Munters has a wide range of dehumidifiers that have design parameters applicable for different usages and applications. Please contact your nearest Munters office if you have any doubt or questions regarding the actual installation. For product data information, see chapter 6, Product Design Information. -
Page 6: Markings
3 = Wet Air Outlet 4 = Process Air Inlet (FR) REMPLACER LE FILTER 5 = React Air Inlet 6 = ML180-MLT350 Filter (DE) FILTER AUSWECHSELN Figure 1-2. Example of identification plate content & Label details 1.5 Operator stations The dehumidifier is controlled and supervised with the help of the... -
Page 7: Installation
ML180-MLT350 Dehumidifiers 2 Installation 2.1 General The ML Dehumidifiers intended for indoor installation. The unit is inspected and checked prior to leaving the factory to guarantee consistent quality and maximum reliability. If the unit is to be put into storage, prior to installation, see section 2.5,... -
Page 8: Moving The Equipment
4. Remove all packing material from the unit, check carefully to make sure that no damage has occurred during transport. 5. Any visible damage must be reported in writing to Munters prior to the start of installation. 2.5 Storing the Equipment... -
Page 9: Location Requirements
ML180-MLT350 Dehumidifiers 2.6 Location Requirements The dehumidifier is intended for indoor installation. It is important that the intended installation site meets the location and space requirements for the equipment in order to achieve the best possible performance and trouble-free operation. -
Page 10: Ducting
ML180-MLT350 Dehumidifiers 2.8 Ducting 2.8.1 General recommendations The connections for process and reactivation air are designed in accordance with the recommendations in ISO 7807. The rectangular duct connections contain tapped inserts for M8 bolt fixings. CAUTION! The dehumidifier has been designed to operate at specific process airflows (corresponding to the fan sizes installed) and must not be directly connected to air-conditioning systems. -
Page 11: Ductwork For Outdoor Air Inlet
ML180-MLT350 Dehumidifiers • The total resistance in the process and reactivation air ductwork must not exceed the performance rating of the fans fitted in the dehumidifier. For details of minimum available static pressure, section 6.5, Technical Specifications. Vertical Wet Horizontal Wet... -
Page 12: Precaution For Unit Using Li Desiccant Rotor
ML180-MLT350 Dehumidifiers Round Duct Rectangular Duct Wire netting, mesh Wire netting, mesh width about 10mm width about 10mm Figure 2-4. Outdoor air inlet design A = Process air inlet B = Dry air outlet C = Reactivation air inlet D = Wet air outlet... -
Page 13: Installation Examples
ML180-MLT350 Dehumidifiers 2.10 Installation Examples 2.10.1 Closed System The closed airflow system is mainly used where the room to be dehumidified contains little or no ventilation, and is partially sealed. Munters A closed airflow system offers the advantage of simple design and therefore low installation costs. -
Page 14: Electrical Connections
Refer to the unit identification plate if in doubt. ML180 & MLT350 dehumidifiers are supplied complete with a pre- wired mains cable. The cable is fitted with a multi-pin plug suitable for connection to a single phase earthed mains socket. -
Page 15: Pre-Start Settings
20VAC, a separate relay controlled by the humdistat must be used. 2.13 Pre-Start settings ML180-MLT350 units are equipped with a number of standard features requiring a few selections and settings before the unit is put in operation for the first time. -
Page 16: Airflow Check And Adjustment
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 process and reactivation airflows could cause the unit to malfunction. - Page 17 ML180-MLT350 Dehumidifiers 4. If the temperature differential is out of tolerance limit by 5%, adjust the reactivation air damper in small stages allowing the temperature display to stabilise after each adjustment) until reactivation temperature reading is within the specified tolerances.
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Page 18: Operation
ML180-MLT350 Dehumidifiers 3 Operation 3.1 General The ML180-MLT350 dehumidifiers are equipped with a control panel that contains mode switches and LED indicators. The mode switch of the control panel has two operating modes: MAN (Manual mode) The dehumidifiers fan, rotor and reactivation heater operate continuously with full capacity. -
Page 19: Automatic Mode - Humidistat
ML180-MLT350 Dehumidifiers 5. Operate the run/stop switch to the position and check that the unit stops and that the unit running indicator goes out. For details on the Control panel, see figure 3-1, Control Panel. 3.5.2 Automatic Mode - Humidistat For the unit to operate in the AUTOmatic mode a one-step humidistat must be installed and correctly connected to the unit. -
Page 20: Control Panel
ML180-MLT350 Dehumidifiers 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 RH98 to the desired set-point. For details on the Control panel, see figure 3-1, Control Panel. -
Page 21: Maintenance
Maintenance interval lengths are primarily determined by operating conditions and the environment in which the unit is installed. When in doubt, consult Munters’ product service department. See addresses for Munters representatives on the back cover of this manual. 4.2 Safety... - Page 22 ML180-MLT350 Dehumidifiers Inspection/Maintenance Procedure Component 3-6 Months 12 Months Process and Clean filter housing and change filter if Clean filter housing and change filter. reactivation filter dirty. Dehumidifier housing Check for physical damage and clean unit Check for physical damage and clean unit externally and internally as necessary.
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Page 23: Fault Finding
The changing of rotors and/or rotor drive mechanism must be 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. - Page 24 Service. Air cooled condenser models: ML180 & MLT350: Circuit Breaker QM12 Investigate the cause of the fault and rectify or call Munters tripped due to a drive motor, fan fault, Product Service. Reset QM12. condenser fan fault or a condenser heater fault.
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Page 25: Product Design Information
M180-MLT350 Dehumidifiers 6 Product Design Information 6.1 Product Description The ML-Series desiccant dehumidifiers are designed to efficiently dehumidify in low moisture applications. They are equipped with an internally sealed rotor unit. The rotor casing is constructed of durable thermoset plastic and contains isolated sections that provide a precise balance for dehumidification, reactivation, and heat recovery airflows. -
Page 26: Dimensions And Service Space
M180-MLT350 Dehumidifiers 6.3 Dimensions and service space Scaled and dimensioned AutoCAD drawings are available in Munters’ DryCAD program (can be ordered at the nearest Munters office). ØD ØE Munter 1. Process air inlet 2. Dry air outlet 3. Reactivation air inlet 4. -
Page 27: Capacity Diagrams
M180-MLT350 Dehumidifiers 6.4 Capacity Diagrams Approximate capacity in kg/h. For detailed information, please contact your nearest Munters office or refer to Munters’ DryCap program. NOTE! The below figures are based on a nominal (1/1) airflow. ML180 ML270 80% RH 60% RH... -
Page 28: Technical Specifications
Figures quoted are nominal, based on fan inlet temperature of 20°C, and an air density of 1,2kg/m Without optional F5 or F7 filter boxes. ML180, ML270, MLT350 dehumidifiers have a single motor driving both process and reactivation air fans. Table 6-2. Technical Specifications... -
Page 29: Unit's Main Components
M180-MLT350 Dehumidifiers 6.6 Unit’s main components Fan Motor Process Impeller Reactivation Impeller Process Filter Reactivation Filter Rotor Rotor Cover Upper Rotor Cover Lower 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: Appendix 1- Options
ML180-MLT350 Dehumidifiers 7 Appendix 1- Options 7.1 General ML180-MLT350 dehumidifiers have been designed to ensure that options can be incorporated with the minimum external physical alteration. For connections details refer to the Circuit Diagram Supplement provided with the unit. NOTE! Voltage drops may be experienced when using excessively long cables. -
Page 31: Display / Change Setpoint Of Relative Humidity
ML180-MLT350 Dehumidifiers The push buttons have the following main functions: Display/change the required value and reset alarm Increase value Decrease value % RH Display position of control steps for reactivation heater ( 0=off; 1=on). During normal operation and in any position of the mode switch the current relative air humidity is displayed. -
Page 32: Process Related Alarms
ML180-MLT350 Dehumidifiers Parameter Description Possible parameter Factory selection setting Correction of the humidity transmitter’s read-off value 0 %RH No settings OFF/ON interval, stage1 1-15 %RH 2 %RH Offset stage 1 -15- +15 %RH -1 %RH OFF/ON interval, stage 2 1-15 %RH... - Page 33 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 Product Service. 7 Appendix 1- Options 190TGB-1034-A...
- Page 34 ML180-MLT350 Dehumidifiers 7 Appendix 1- Options 190TGB-1034-A...
- Page 36 Fax: +358 (0)9 8386 0336 Fax: +82 (0)2 552 8772 BRAZIL FRANCE MEXICO SINGAPORE THAILAND Munters Brasil Munters France S.A. Munters de Mexico S.A. de C.V. Munters Pte Ltd Munters Co., Ltd Vila Emiliano perneta ARGENTEUIL GUADALUPE N.L. SINGAPORE BANGKOK Tel: +662 645 2708...
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