Related Manuals for Munters ML420
Summary of Contents for Munters ML420
- Page 1 Original instructions User manual ML420, ML690, MLT800 ML1100, ML1350, MLT1400 Desiccant dehumidifier 190TGB-1035-H1604 © Munters Europe AB 2016...
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Page 2: Important User Information
Important user information Intended use Safety Munters dehumidifiers are intended to be used for the Information about dangers are in this manual indicated dehumidification of air. Any other use of the unit, or by the common hazard symbol: use which is contrary to the instructions given in this... -
Page 3: Table Of Contents
Sound data ......External humidity sensor ... . . 9.4.1 Sound data ML420 ... . Gas reactivation (ML1100 units 9.4.2 Sound data ML690 . - Page 4 1.6.1 Introduction ....Contact Munters ......
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Page 5: Introduction
Read through the manual before the dehumidifier is installed and used. Contact your nearest Munters office if you have any questions regarding the installation or the use of your dehumidifier. - Page 6 - The dehumidifier can restart automatically after a power cut. Always set and lock the main power switch in the OFF position before carrying out any service work. - Use only approved lifting equipment to prevent personal injury and damage to the equipment. - Always contact Munters for service or repair. Introduction 190TGB-1035-H1604...
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Page 7: Markings
Dehumidifier ML420-MLT1400 1.4 Markings Tor r l uf t Tr ockenl uf t Dr y ai r Ai r s ec Våt l uf t W et ai r Nas s l uf t Ai r hum i de Pr oces s l uf t... -
Page 8: Dehumidifier Design
Dehumidifier ML420-MLT1400 2 Dehumidifier design 2.1 Product description The desiccant dehumidifiers in the ML series have been developed to effectively dehumidify the air in environments requiring low air humidity. The dehumidifier is equipped with an encapsulated rotor unit. The rotor casing is constructed of durable thermoset plastic and contains isolated sections that provide a precise balance for the dehumidification, reactivation and heat recovery airflows. -
Page 9: Main Components
Reactivation fan motor Upper rotor cover Process fan motor Electrical control panel Process air impeller Reactivation heater Process air filter NOTE! The ML420 unit has only one fan motor that is placed between the process and reactivation impeller. Dehumidifier design 190TGB-1035-H1604... -
Page 10: Transport, Inspection And Storage
Remove all packaging material from the unit, and make sure that no damage has been made during ■ transportation. Any visible damage must be reported in writing to Munters within 3 days and prior to installation of ■ the unit. -
Page 11: Installation
If in doubt, contact Munters. 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. -
Page 12: Foundation
Dehumidifier ML420-MLT1400 4.3 Foundation The dehumidifier must be installed on a level floor, or on a platform capable of supporting the machine weight. If the maximum floor loading weight is not exceeded, special foundations are not required. When the dehumidifier has been installed, check that it is level. -
Page 13: Duct Installation
Dehumidifier ML420-MLT1400 Figure 4.2 Changing panel positions Figure 4.3 Rotor stop (E) and filter monitors (F) 1. Remove the two bolts (B) securing the front panel and carefully remove the panel. 2. Remove the two bolts securing the rear panel and carefully remove the panel. - Page 14 Dehumidifier ML420-MLT1400 Part number 170-013448–005 170-013448–004 170-013448–003 170-013448–002 170-013448–001 Ø 100 Ø 125 Ø160 Ø200 Ø250 See section 9.1, Dimensions and service space. L (mm) ML420 ML690 MLT800 ML1100 ML1350 MLT1400 CA UTION! UTION! UTION! The dehumidifier has been designed to operate at specific process airflows corresponding to the fan sizes installed.
- Page 15 Dehumidifier ML420-MLT1400 Munter s Figure 4.5 Ducts required for installation A. Process air inlet 1. Dry air damper B. Dry air outlet 2. External filter box (option) C. Reactivation air inlet 3. Duct transition D. Wet air outlet 4. Reactivation air damper 5.
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Page 16: Duct For Outdoor Air Inlet
Dehumidifier ML420-MLT1400 4.5.2 Duct for outdoor air inlet When bringing ambient air from outdoors into the dehumidifier, the inlet duct opening must be located sufficiently high above ground level to prevent dust and debris from entering. The ducting must be designed to prevent rain and snow from being drawn into the dehumidifier. The air inlet must be located away from possible contaminants such as engine exhaust gases, steam and harmful vapours. -
Page 17: Li Desiccant Rotor
4.6 Precautionary measures for units with LI desiccant rotor The standard delivery is Munters high performance desiccant rotor HPS (High Performance Silica gel). If the dehumidifier is delivered with an LI rotor (lithium chloride) it is important that the rotor does not become loaded with moisture when the dehumidifier is off. -
Page 18: Gas Reactivation (Ml1100 Units Only)
Dehumidifier ML420-MLT1400 Voltage drops can occur when using excessively long cables. ■ If the voltage across the terminals used for connecting the humidity sensor is less than 20 VAC, a separate relay controlled by the humidity sensor must be used. -
Page 19: Commissioning
Dehumidifier ML420-MLT1400 5 Commissioning The ML420-MLT1400 dehumidifiers have several standard functions that need to be set before initial start-up. Some of the functions require connection to external equipment. Some features require connection of external equipment. For wiring details, see the wiring diagram. -
Page 20: Pre-Start Checks
Dehumidifier ML420-MLT1400 5.2 Pre-start checks W W W ARNING! ARNING! ARNING! Installation, adjustments, maintenance and repairs must only be carried out by qualified personnel who are aware of the risks involved when working with equipment operating with high electrical voltage and high machine temperatures. -
Page 21: Airflow Check And Adjustment
To obtain the design performance, the dry air and reactivation airflow dampers must be correctly adjusted in accordance with the rated airflow, see section 9.3, Technical data. If necessary, contact Munters for assistance concerning installation and settings. Munters contact addresses are provided on the back cover of this manual. -
Page 22: Operation
Dehumidifier ML420-MLT1400 6 Operation 6.1 General ML420-MLT1400 dehumidifiers are equipped with an operator panel with a mode selector switch and LED indicators. The mode selector of the operator panel has two operating positions: MAN (Manual mode) The dehumidifier fans, rotor and reactivation heater operate continuously at full capacity. -
Page 23: Operator Panel
Dehumidifier ML420-MLT1400 6.4 Operator panel OUT. 1 OUT. 2 ALARM % RH RH 98 150 C 100 C 50 C 12 13 Figure 6.1 Main power switch Figure 6.2 Operator panel with built-in RH98 Operation 190TGB-1035-H1604... - Page 24 Dehumidifier ML420-MLT1400 Item Switch/Indicator Function Main power switch When the main power switch is set to ”0”, there is no power in the control circuit, and the unit cannot be started. When the main power switch is set to ”1”, power is supplied to the control circuit, and the dehumidifier can be started using the mode switch.
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Page 25: Rh98 Operator Panel
Dehumidifier ML420-MLT1400 6.5 RH98 operator panel OUT .1 OUT .2 ALARM RH 98 Figure 6.3 RH98 operator panel Checking and changing set points and control parameters can be made during operation or in stand-by mode. Button Function Display/change a certain value and reset the alarm... -
Page 26: Automatic Mode - Humidity
Dehumidifier ML420-MLT1400 4. Set the mode switch on the control panel to ”0” and check that both the indicator lamps for the reactivation heater go out. NOTE! In order to dissipate any residual heat, the reactivation air fan, process air fan and the drive motor will continue to run (after the unit has been switched off) until the temperature has fallen below 50 °C. - Page 27 Dehumidifier ML420-MLT1400 2. Adjust the RH98 or VariDry setpoint to the lowest RH value, see section 6.5, RH98 operator panel. 3. Set the main power switch to ”1” (on). Check that the following indicator lamps are on and that the unit is running.
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Page 28: Service And Maintenance
Munters products. All test equipment used by our personnel to ensure proper system balancing is certified for accuracy. Munters Service can offer a service plan adapted to suit the conditions of a specific installation. See contact addresses on the back page of this manual. -
Page 29: Extended Warranty
Use only a pH-neutral soapy water solution and a soft sponge for cleaning of the unit casing. When cleaning the inside, avoid contact with the rotor and wipe the surfaces dry. Use a vacuum cleaner with a brush head for the rotor. Contact Munters for instructions if vacuum cleaning is not sufficient. - Page 30 Dehumidifier ML420-MLT1400 NOTE! Service work should be performed at indicated operating hours or calendar time, whichever is reached first. NOTE! Maintenance schedule restarts again after maintenance type D. Service and maintenance 190TGB-1035-H1604...
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Page 31: Filter Change
Dehumidifier ML420-MLT1400 7.7 Filter change Replace the filters if necessary every 6 months, see description below. 1. Loosen the two screws on the top of the frontpanel. Use Allen Key No. 5. 2. Lift the panel and remove it from the unit. -
Page 32: Fault Tracing
Go through the list in section 8.3, Fault tracing list before contacting Munters. The list provides help in identifying types of faults that are easy to remedy without the assistance of specially trained personnel. -
Page 33: Fault Tracing List
The control panel LED are the primary source of information for fault tracing when the unit has given an alarm and stopped automatically. Go through the fault tracing list below before contacting Munters service department. The list contains information for identifying faults that are easy to repair without the help of a technician. - Page 34 Investigate the cause of the fault, and rectify. Drive motor fault ML420: Reset QM16 - drive motor, reactivation fan and process fan. ML690-MLT1400: Reset QM16 - reactivation fan. Reset QM21 - drive motor or process fan. Reset QM18 for units with a condenser.
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Page 35: Technical Specification
Dehumidifier ML420-MLT1400 9 Technical specification 9.1 Dimensions and service space Munter 1. Process air inlet 3. Reactivation air inlet 2. Dry air outlet 4. Wet air outlet Figure 9.1 Required service space Figure 9.2 Hole pattern for duct connection Dimensions (mm) -
Page 36: Capacity Diagrams
Dehumidifier ML420-MLT1400 9.2 Capacity diagrams Approximate capacity in kg/h. Please contact your nearest Munters office for more detailed information. NOTE! The below figures are based on a rated airflow. ML420 MLT800 kg/h kg/h 15.0 15.0 ML690 ML1100 12.5 12.5 10.0 10.0... - Page 37 Dehumidifier ML420-MLT1400 kg/h kg/h 15.0 15.0 MLT1400 ML1350 12.5 12.5 10.0 10.0 Process air temperature (°C) Process air relative humidity (% RH) Dehumidification capacity (moisture removal per hour) (kg/h) Technical specification 190TGB-1035-H1604...
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Page 38: Technical Data
Dehumidifier ML420-MLT1400 9.3 Technical data The following is applicable to units fitted with electric reactivation heater. Model ML420 ML690 MLT800 ML1100 ML1350 MLT1400 Process air Rated airflow (m 0,116 0,192 0,222 0,305 0,375 0,388 Rated airflow (m 1100 1350 1400... - Page 39 (1) Figures quoted are based on fan inlet temperature of 20°C, and an air density of 1,2 kg/m (2) Without optional F5 or F7 filter boxes. (3) ML420 dehumidifiers have a single motor driving both process air and reactivation air fans. (4) Contacts on the PCB used to give an external indication to the unit (output).
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Page 40: Sound Data
Definitions: Lp(A) = Sound pressure (free field, Directivity factor Q=2, d=1 distance from source in meter) Lp(A) = Lw(A) + 10Log(Q/(4πd²)) Lw(A) = Sound power level dB (A-weighted) 9.4.1 Sound data ML420 Lp(A) at 1 m Lw(A) Measure range (Hz) -
Page 41: Sound Data Ml690
Dehumidifier ML420-MLT1400 9.4.2 Sound data ML690 Lp(A) at 1 m Lw(A) Measure range (Hz) 1000 2000 4000 8000 Table 9.5 Sound to room, all inlets and outlets ducted Duct Lw(A) Measure range (Hz) 1000 2000 4000 8000 1. Dry air 2. -
Page 42: Sound Data Ml1100
Dehumidifier ML420-MLT1400 9.4.4 Sound data ML1100 Lp(A) at 1 m Lw(A) Measure range (Hz) 1000 2000 4000 8000 Table 9.9 Sound to room, all inlets and outlets ducted Duct Lw(A) Measure range (Hz) 1000 2000 4000 8000 1. Dry air 2. -
Page 43: Sound Data Mlt1400
Dehumidifier ML420-MLT1400 9.4.6 Sound data MLT1400 Lp(A) at 1 m Lw(A) Measure range (Hz) 1000 2000 4000 8000 Table 9.13 Sound to room, all inlets and outlets ducted Duct Lw(A) Measure range (Hz) 1000 2000 4000 8000 1. Dry air 2. -
Page 44: Scrapping
Dehumidifier ML420-MLT1400 10 Scrapping The unit must be scrapped in accordance with applicable legal requirements and regulations. Contact your local authorities. If the rotor or filters have been exposed to chemicals that are dangerous to the environment the risk must be assessed. -
Page 45: Appendix 1Options
1.5 Filter box - M5 and F7 ML420-MLT1400 dehumidifiers can be equipped with external filter boxes M5 or F7. For instructions on how to attach the filter box to the process air inlet or reactivation air inlet, refer to the instructions supplied with the delivery of the filter box. -
Page 46: Humidity Control System
1.6 Humidity control system 1.6.1 Introduction Munters RH98 and VariDry are humidity control systems intended for use with Munters dehumidifiers. They control the air humidity by regulating the power to the unit reactivation heater. The system comprises a humidity transmitter and a control unit. The humidity transmitter is a true two wire transmitter, which is positioned where the air humidity is to be controlled, either in the relevant room or in the air duct. -
Page 47: Setpoints And Control Parameters
Dehumidifier ML420-MLT1400 There is also an operator panel with a display on the control unit. During normal operation, the display shows the current measured air humidity. Different parameters can be set using the push buttons on the panel. Examples are settings for air humidity, controller limits and alarm limits. -
Page 48: Display/Change Setpoint For Relative Humidity
Dehumidifier ML420-MLT1400 1.6.5 Display/change setpoint for relative humidity 1. Press/release . The value in the lower right corner starts flashing and shows the current setpoint. The display automatically returns to normal after about twenty seconds, i.e. shows current value for relative humidity. - Page 49 Dehumidifier ML420-MLT1400 Parameter Description Possible parameter selection Default 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...
- Page 50 Dehumidifier ML420-MLT1400 Parameter Description Possible parameter selection Default setting Proportional band 1-15 % RH Integration time 0-99 seconds 0 (= off) Differential action, percentage 0-100 % RH 0 (= off) Cycle time 0-999 seconds Correction of the humidity sensors’s value...
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Page 51: Process Alarms
The humidity transmitter's read off value can be calibrated using the operator panel sensor offset, se parameter 05, Table 1.1. Example: If 3% RH is too much, the offset should be reduced by 3%. Contact Munters for calibration of the humidity transmitter. Options 190TGB-1035-H1604... -
Page 53: Contact Munters
BELGIUM Munters Belgium nv Blarenberglaan 21c Tel: +3215285611 Air Treatment B-2800 Mechelen service@muntersbelgium.be www.muntersbelgium.be CZECH REPUBLIC Munters CZ, organizacni slozka Slevacská 2368/68 Tel: +420 775 569 657 info@munters-odvlhcovani.cz Air Treatment CZ-615 00 BRNO www.munters-odvlhcovani.cz DENMARK Ryttermarken 4 Tel: +4544953355... - Page 56 www.munters.com...
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