User`s Manual
Contents
1. nanaannnnnennanennennne 20 6 3 Dimensions and service space 21 6 4 Capacity Dagorams nnee 22 6 6 Fan Eet eege nu ans 22 6 6 ACCessories 23 6 7 Technical Specifications 24 190TGB 1004 F05 05 Contents 3 M Munters Mantes Important user information Intended use of equipment The MG50 amp MG90 dehumidifiers are intended to be used for the dehumidification of air All other uses of the equipment or use which is contrary to the instructions given in this manual can cause personal injury and or machine damage Warranty and obligations The warranty period is 12 months from the date the equipment left our factory unless otherwise advised in writing The warranty is limited to a free exchange complete with free freight of faulty units or components which have failed as a result of faulty quality or defects in manufacture Munters guarantees that the delivered unit has undergone rigid testing to ensure that the specifications stated here are fulfilled All claims on warranty must verify that the fault has occurred within the guarantee period plus that the unit has been used within its operating range as stated in the specification All claims must include the unit type and manufacturing number This data is to be found stamped on the unit identification plate see Section Markings for location Note The contents of this publication can be changed without prior notice This publication contains information2. User s Manual Desiccant Dehumidifiers MG50 amp MG90 Gei Munters MG50 90 Dehumidifiers M Munters uge Contents Important user information 4 1 Introduction PCR eee 5 1 2 About this manual 5 1 3 Safety and Cautions 5 LA ET ln Le Son sn 6 2 Installation Sr CICILY da tu pa 7 2 2 Packaging and delivery inspection 7 2 3 Storing the equipment 7 2 4 Location requirements 8 2 5 Duct hose connections ssessseneneeneesereen 8 20 1 General issoria 8 2 5 2 Ducting and airflow adjustment 9 2 6 Mounting units on the Wall 10 2 7 Installation examples 11 2 8 Electrical connections 13 2 8 1 General 13 282 Safely aise ieee 13 2 9 Connecting the humidistat 13 3 Operation 3 1 Starting UP 15 3 2 Emergency stop 15 SAS SE E 15 3 3 1 Manual operation 15 3 3 2 Automatic operation 15 3 4 Stopping the unit 16 4 Maintenance 4 1 General 17 E 17 4 3 Maintenance schedule aannannnannnnnnnnnnnnnnnnn 17 5 Fault finding 5 1 General 18 5 2 Ee 18 5 3 Fault localization cccccececececcaceeecenenees 18 6 Product Design Information 6 1 Product description 20 6 2 Principal of operation
3. 1 230V 50Hz M 0 040kwW ffl 0 4 kw Max 0 440 kw IP44 C Munters Europe AB Figure 1 2 Identification plate content Introduction 190TGB 1004 F MG50 90 Dehumidifiers 2 Installation 2 1 Safety gt gt bbb BE M Munters gg WARNING The dehumidifier must be connected to an earthed electrical outlet WARNING The unit must not be connected to other mains than specified on the units identification plate WARNING The unit must not be opened by anyone other than trained and qualified personnel CAUTION Jr ere is a risk for freezing temperatures the wet air ducting must be insulated CAUTION We recommend that only a qualified electrician should connect the humidistat to the cable WARNING All electrical equipment connections must be carried out in accordance with local regulations and by qualified personnel WARNING Do not place the Wet Air side A and the back side B of the unit close to the wall or close to heat sensitive objects Position the dehumidifier so that there is sufficient space for the air to circulate around it see section 2 4 Location requirements 2 2 Packaging and delivery inspection NOTE 2 3 Storing the equipment 190TGB 1004 F 1 Check the delivery against the packaging list consignment note or other delivery documents and check that everything is included and nothing is damaged 2 Contact Munters immediately if delivery is not complete in order to avoid ins
4. PCB the fan may continue to run when the reactivation heater has been switched off For details refer to section 2 9 Connecting the humidistat 4 Adjust the humidistat set point to the desired RH value 3 4 Stopping the unit Stop the unit by disconnecting it from the mains supply or by operating the externally mounted circuit breaker 16 Operation 190TGB 1004 F MG50 90 Dehumidifiers M Munters gg 4 Maintenance 4 1 General The dehumidifier is designed for long continuous operation with minimum attention Under normal operating conditions requirements for maintenance are minimal 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 o WARNING The unit must not be opened by anyone other than trained and qualified personnel 4 3 Maintenance schedule The following maintenance schedule is recommended by Munters and covers procedures for inspection and maintenance as well as suggested time intervals for a unit that operates under normal operational and environmental conditions If the process air has a high dust content preventative scheduled maintenance should be performed at shorter intervals than what is specified below Inspection Maintenance Process and Clean filter cassette and change
5. SWEDEN www munters com Munters Europe AB SOLLENTUNA Tel 46 8 626 6300 Fax 46 8 754 8594 avfuktning munters se SWITZERLAND Munters AG ZURICH Tel 41 1 271 1013 Fax 41 1 271 1019 munters gl gmx ch THAILAND Munters Co Ltd BANGKOK Tel 662 645 2708 Fax 662 645 2710 UNITED KINGDOM Munters UK Ltd HUNTINGDON Tel 44 1480 432 243 Fax 44 1480 413 147 info munters co uk
6. connected to a connection piece First remove the orifice plate B fitted in the connection piece 190TGB 1004 F Installation 11 M Munters MG50 90 Dehumidifiers weg The wet air outlet is connected to a hose and is then discharged outside Reactivation air is taken from the dehumidified space NOTE A short hose 0 3 m on the dry air outlet can improve the air circulation and eliminate the risk of short circuiting dry air and process air Resulting dehumidifying capacity is 2 3 of the diagram data see section 6 4 Capacity Diagrams for details Figure 2 4 Installation examples in a closed system Ventilating System The space is ventilated with dehumidified air Dry air is supplied to the space through a hose connected to a connection piece fitted with an orifice plate B in order to obtain required reduction of process airflow MG50 25 m h MG90 45m h 12 Installation 190TGB 1004 F MG50 90 Dehumidifiers M Munters gg The wet air outlet is connected to a hose and is then discharged outside Reactivation air and process air are taken from outside through hoses and connection pieces Dry air is supplied to the space through a connection piece fitted with an orifice plate B in order to obtain required reduction of process airflow MG50 25 m h MG90 45 m h Figure 2 5 Installation examples in a ventilating system 2 8
7. info munters dk DUBAI Munters Middle East DUBAI Tel 971 488 130 26 Fax 971 488 131 06 FINLAND Munters OY HELSINKI Tel 358 9 8386 030 Fax 358 9 8386 0336 info munters fi FRANCE Munters France SAS ARGENTEUIL Tel 33 1 34 11 57 57 Fax 33 1 34 11 57 58 dh munters fr GERMANY Munters GmbH HAMBURG Tel 49 40 734 16 01 Fax 49 40 734 11 11 mgd munters mail de ITALY Munters S R L ASSAGO MI Tel 39 02 488 6781 Fax 39 02 488 1171 info munters it JAPAN Munters KK TOKYO 174 Tel 81 0 3 5970 0021 Fax 81 0 3 5970 3197 KOREA Munters SEOUL Tel 82 0 2 865 8771 Fax 82 0 2 865 8737 MEXICO Munters de Mexico S A de C V APODACA N L Tel 52 81 8262 5400 Fax 52 818262 5401 NETHERLANDS Munters Vochtbeheersing ALPHEN a d RIJN Tel 31 172 43 32 31 Fax 31 172 44 29 60 vochtbeheersing munters nl NEW ZEALAND Munters Pty Ltd AUCKLAND Tel 64 96 34 8241 Fax 64 96 34 8237 POLAND Munters Poland Sp zoo GDANSK Tel 48 58 320 01 00 Fax 48 58 320 01 19 dh munters pl SINGAPORE Munters Pte Ltd SINGAPORE Tel 65 6744 6828 Fax 65 6744 9585 SOUTH AFRICA Munters Pty Ltd JOHANNESBURG Tel 27 0 11 971 97 00 Fax 27 0 11 971 97 25 unters SPAIN USA Munters Spain SA Munters Corporation MADRID AMESBURY Tel 34 91 640 09 02 Fax 34 91 640 11 32 marketing munters es Tel 1 978 241 1100 Fax 1 978 241 1214
8. the cut out To reset the cut out the unit must be unplugged from the mains supply then re connected when the unit has cooled down The major causes of the high temperature cut out tripping are Reactivation airflow failure Blocked filter or duct Fan impeller obstructed Check to see if orifice A is fitted Check that the reactivation heater is operating by measuring the power consumption see table 6 4 Power specifications Check the ductwork if fitted and filters for blockages or signs of leaks The usage of an orifice plate in conjunction with a wall pipe also causes too low reactivation airflow Check rotor drive belt and drive motor Check the rotor is rotating at about 10 revolutions per hour by looking through the dry air outlet 19 M Munters Mantes MG50 90 Dehumidifiers 6 Product Design Information 6 1 Product description 6 2 Principal of operation 20 The MG50 amp MG90 desiccant dehumidifiers are designed to efficiently dehumidify air Their very compact construction incorporates sections held together by four bolts The fan desiccant rotor and reactivation heater are secured in fixed positions within their respective sections without utilizing additional attachments One of the sections contains a distribution chamber with isolated sections that provide precise balance for dehumidification and reactivation airflows Its rugged casing is constructed from corrosion res
9. trouble free operation For unit and service dimensions see section 6 3 Dimensions and service space WARNING Do not place the Wet Air side A and the back side B of the unit close to the wall or close to heat sensitive objects Position the dehumidifier so that there is sufficient space for the air to circulate around it Back side B Front side A It is important both for maintenance and for service that the minimum dimensions for service access are complied with Follow the instructions below when ducts or alternate flexible hoses are attached to the unit s air outlet connections Process and reactivation air inlets and the dry air outlet can be connected to a duct system or operated with free suction and discharge The wet air outlet however must always be connected to a duct or hose which must be mounted so as to slope down from the dehumidifier to allow drainage of condensate Ducting shall be as short as possible so as to minimize static pressure losses For unrestricted performance all duct connections must be air and vapour tight Installation 190TGB 1004 F MG50 90 Dehumidifiers A M Munters gg Ducting for wet air shall be installed at a downward incline to enable condensate to drain The wet air ducting should be provided with suitable drainage at low points to prevent the collection of condensed water Alternatively condensation can be avoided by insulating the duct wi
10. 20 30 C 10 0 10 20 30 C 1 Process air temperature C 2 Process air relative humidity RH 3 Dehumidification capacity kg h moisture removel kg hour 6 5 Fan Diagrams Figure 6 3 MG50 amp MG90 Capacity diagrams rated airflow The fan diagrams are for inlet conditions 20 C density 1 2 kg m qm h gt q m h gt 20 40 60 80 100 120 10 20 30 40 50 60 70 A ES E MG 90 d MG 50 250 1 200 1 200 gt 60 Hz 150 2 60 Hz 150 60 Hz 60 Hz 100 50H S oc 50 Hz 50 Hz 50 50 Hz 50 2 4 6 8 10 12 14 16 18 20 ee 5 10 15 20 25 30 35 q l s gt Symbols q Airflow l s m h ps Static pressure available 1 Process air 2 Reactivation air Without orifice plate on wet air outlet 1 1 The dehumidifier is equipped with an orifice plate on the wet air outlet at delivery Figure 6 4 MG50 amp MG90 Fan Diagrams 22 Product Design Information 190TGB 1004 F MG50 90 Dehumidifiers 6 6 Accessories 190TGB 1004 F Figure 6 5 Accessory locations Accessory Connection piece for process air and reactivation air 62 5 mm L 70 mm Con
11. Clean filter housing and change filter Reactivation filter filter as required Unit housing Check for physical damage and clean unit exterior if necessary Check for physical damage and clean unit exterior if necessary If ducted check connections for signs of air leaks and incorrect fitting Function and Carry out a full function and performance check performance check and replace worn components as necessary Humidistat N A Check sensor functions and calibrate or replace if necessary Contact you local Munters s product service department as required 1 When replacing the filter casette ensure that the arrow is pointing towards the dehumidifier Table 4 1 Maintenance schedule 190TGB 1004 F Maintenance 17 weg M Munters MG50 90 Dehumidifiers 5 Fault finding 5 1 General The purpose of this chapter is to provide guidance in basic fault finding and provide instructions for corrective actions so as to remedy faults 5 2 Safety WARNING The unit must not be connected to other mains than specified on A the units identification plate WARNING The unit must not be opened by anyone other than trained and qualified personnel 5 3 Fault localization Go through the following fault localization list below before contacting Munters product service department The list provides help in identifying types of faults that are easy to remedy without the assistance of specially trained personnel 18 Fau
12. Electrical connections 2 8 1 General Included with delivery is a 2 5m long power cable with a plug for connection to an earthed outlet The voltage and frequency are specified on the unit s identification plate 2 8 2 Safety o WARNING The unit must be connected to an earthed electrical outlet A WARNING The unit must not be connected to other mains than specified on the unit s identification plate 2 9 Connecting the humidistat The dehumidifiers are supplied with a pre wired socket suitable for connecting the unit to a low voltage single stage humidistat see figure below The humidistat can be ordered as an optional extra Figure 2 6 Humidistat Cable Connecting plug CAUTION We recommend that only a qualified electrician should connect the humidistat to the cable 190TGB 1004 F Installation 13 weg M Munters MG50 90 Dehumidifiers The connection socket for the humidistat is located on the front of the unit Humidistat Socket Figure 2 7 Humidistat Location The humidistat should be mounted 1 1 5 m above the floor and positioned so that it is not exposed directly to dry air from the unit or incoming moist air from opening and closing doors It may not be placed close to a heat source or so that it is exposed to direct sunlight The humidistat shall be a single stage humidistat and connected so that the controlling circuit closes as relative humidity increases The connecting cable shall be screene
13. Filter il T N 4 de Uy M M UM Er GESCHT LOTT TT Mit Figure 6 1 Principal of operation 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 1 Process Air Inlet 2 Dry Air Outlet 3 Reactivation Air Inlet 4 Wet Air Outlet Figure 6 2 Dimensions Width A Depth B Height C Diameter D Diameter E pis Raia Weight Table 6 1 Dimensions amp Weight 1 Connection piece aCCeSSOry option NOTE The above dimensions amp weight are for both the MG50 and the MG90 dehumidifiers 190TGB 1004 F Product Design Information 21 M Munters ue 6 4 Capacity Diagrams MG50 90 Dehumidifiers Approximate capacity in kg h For detailed information please contact your nearest Munters office or refer to Munters DryCap program 0 50 2 0 50 GE MG50 MG90 80 RH 0 40 0 40 60 RH E EE Oo 40 RH 0 30 0 30 80 RH 60 RH 5 0 209 pts i 40 RH 0 20 5 0 10 0 10 0 0 10 0 10
14. close to the wall on the right side of the unit 2 The other is to have the front of the unit facing the wall so that the wet air outlet is positioned furthest away from the wall to the left side of the unit Option 1 amp 2 both have a strip of wood or similar placed inbetween the wall bracket and the wall This wood is required so that to enable enough space for air to circulate around the units and to be able to connect the humidistat plug option 2 Option 2 A Wall Bracket B Wet Air Hose Dry Air C Wall Pipe Outlet Mounted with a down slope towards the outside D Wooden Distance Depth 30 mm Width 40 mm Wet Air Length 350 mm Outlet J Optional extra Figure 2 2 Wall mounted dehumidifiers 10 Installation 190TGB 1004 F MG50 90 Dehumidifiers M Munters gg Z d Figure 2 3 Wall Pipe 2 7 Installation examples Closed Airflow System The air in the space is recirculated through the dehumidifier The wet air outlet is connected to a hose and is then discharged outside Reactivation air is taken from outside through a hose connected to a connection piece NOTE A short hose 0 3 m on the dry air outlet can improve the air circulation and eliminate the risk of short circuiting dry air and process air Process air it taken from the dehumidified space through a hose connected to a connection piece Dry air is supplied to the space through a hose
15. d and have copper conductors with a minimum cross section area of 2 x 0 75 mm If the units are in conjunction with an external humidistat it can operate in either A or B mode A mode The humidistat controls the entire dehumidifier ON OFF default mode B mode The humidistat controls only the reactivation heater and the fan continously operates ON OFF At delivery the dehumidifier is connected to operate in the A mode To change the dehumidifier to B mode move the link at S2 on the PCB from A to B as shown in figure 2 8 PCB Board For the location of the PCB see figure 6 1 Principal of operation o WARNING All electrical equipment connections must be carried out in accordance with local regulations and by qualified personnel Te D P ai H5O FAULT 7 oF TI OL S Zi Oly SG vy Cl E sert R O O O Ca H H al D 3 4 H2O lu Ml ee E OL Hell 22 ites lt R4 C2 20 19 18 17 16 15 14 p ooe Eck eoo C2 M2 E1 Figure 2 8 PCB Board 14 Installation 190TGB 1004 F MG50 90 Dehumidifiers 3 Operation 3 1 Starting up 3 2 Emergency stop 3 3 Start 3 3 1 Manual operation 3 3 2 Automatic operation 190TGB 1004 F NOTE MAN AUT mode switch M Munters gg Before starting the dehumidifier for the first time carry out the following checks 1 Check that the unit has been correctly connec
16. d manufacturing organization The unit conforms with the specifications in the Machinery Directive 98 37 EEC the Low Voltage Directive 73 23 EEC as amended by Directive 93 68 EEC and the EMC Directive 89 336 EEC as amended by Directives 92 31 EEC and 93 68 EEC The standards applied are listed in the EC Declaration of Conformity 190TGB 1004 F MG50 90 Dehumidifiers 1 Introduction 1 1 General 1 2 About this manual 1 3 Safety and Cautions 190TGB 1004 F M Munters unre The MG50 and MG90 desiccant 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 MG50 90 product data see chapter 6 Product Design Information This manual is written for the user of the dehumidifier and describes the installation operation maintenance and basic fault finding The information structure of the manual is built on numbered chapters and sections Contents page 3 gives a quick overview The different chapters can be used separately to serve their purpose Figures and tables are numbered in accordance with the actual chapter e g figure 1 3 is picture number 3 and is found in chapter 1 The goal of the manual is to provide the necessary information for the user to understand the unit s constructio
17. istant die case aluminium The electrical control system conforms to EN 60204 IEC204 standards and the electrical components are assembled in the upper compartment MG Series dehumidifiers conform to both harmonised European Standards and to CE marking specifications The unit s 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 the rotor The moisture in the process air is deposited into the rotor structure and the process air will then leave the rotor as dry air While the rotor rotates slowly the incoming process air always meets a dry rotor structure thus creating a continuous dehumidification process 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 airflow that is used to reactivate dry the rotor structure is called reactivation air and is first heated Passing through the smallest sector of the rotor in the opposite direction to the process airflow the reactivation air removes the deposited moisture and leaves the rotor as wet air warm moist air This method of operation means that the dehumidifier also works effectively at temperatures below 0 C Product Design Information 190TGB 1004 F MG50 90 Dehumidifiers M Munters Drive motor PCB board Reactivation air
18. lt finding 190TGB 1004 F MG50 90 Dehumidifiers M Munters eg Fault Symptom Possible Cause Retin Unit has stopped Unit has stopped Unit has stopped Loss of Performance Dehumidifier appears to be operating correctly but is not controlling the humidity 190TGB 1004 F Failure of the electrical supply Unit switched to automatic mode by mistake with no humidistat connected Humidistat fault automatic mode The thermal protection in the fan motor has tripped High temperature cut out has tripped Reactivation temperature too low Reactivation heater not operating Reactivation airflow is incorrect Rotor drive failure Table 5 1 Fault localization Fault finding Check power supply to the unit Set the operating mode to manual mode and check that the dehumidifier Starts Set the operating mode to manual mode and check that the dehumidifier starts If the unit starts the humidistat is probably at fault Check the humidistat by seeing if the dehumidifier starts when the humidistat set point is reduced Reset the humidistat set point after the check Calibrate the humidistat if necessary or replace Switch off the unit and disconnect it from the mains Remove the duct connection piece and filter cassette on the process and or reactivation side Ensure that the fan impellers that are now accessible rotate freely Check that the filters and ducts are not blocked and reset
19. n and function and to serve as a guide during installation operation maintenance and basic fault finding that generally can be carried out before contacting Munters Product Service The contents of this manual include suggested best working practices and procedures These are issued for guidance only they do not take precedence over the individual responsibility and or local safety regulations During installation and operation of this equipment it is always each individual person s responsibility to consider e Their own and others personal safety e The safety of the unit through correct use of the equipment in accordance with the descriptions and instructions given in this manual Every care has been taken in the design and manufacture of the MG50 and MG90 dehumidifiers to ensure that they meet the safety requirements of the directives and standards listed in the EC Declaration of Conformity It is recommended to be informed about the use of safety symbols in this manual by reading the opposite page Important user information The relevant safety information for this manual will be found listed early in each manual chapter Introduction 5 M Munters AUNT MG50 90 Dehumidifiers 1 4 Markings Location of the unit identification plate figure 1 1 Identification plate location The units Identification plate is located on the underneath of the dehumidifier V Munters Type MG50 Fabr No 0214 190XXX XXXXX
20. nducted dBa 58 56 IEC protective class unit IP44 IP44 IEC protective class electrical panel IP54 IP54 Fan motor winding insulation grade Class B Class B Drive motor winding insulation grade Class B Class B Rotor type HPS HPS 1 Stated performance based on 20 C and air density of 1 2kg m 2 Common motor for process and reactivation fans Table 6 3 Technical specifications Total power voltage and current amphs phase vonage M Frequency Hz 50 60 50 60 50 60 50 60 50 60 50 60 50 60 50 60 Total Power curent A Table 6 4 Power specifications 24 Product Design Information 190TGB 1004 F MG50 90 Dehumidifiers M Munters eg 190TGB 1004 F Product Design Information 25 M Munters MG50 90 Dehumidifiers Manes 26 Product Design Information 190TGB 1004 F AUSTRALIA Munters Pty NORTH ALBURY Tel 61 0 260 256 422 Fax 61 0 260 258 266 AUSTRIA Munters Luftentfeuchtung WIEN Tel 43 1 616 42 98 Fax 43 1 616 42 98 98 info munters co at BELGIUM Munters N V AARTSELAAR Tel 32 3 458 24 34 Fax 32 3 458 24 33 sales info muntersnv be BRAZIL Munters Brasil S o Paulo Tel 55 0 11 505 40 150 Fax 55 0 11 505 40 883 CANADA Munters Inc MISSISSAUGA Tel 1 905 858 5851 Fax 1 905 858 9130 CHINA Munters Beijing Ltd BEIJING Tel 86 0 10 80 481 121 Fax 86 0 10 80 483 493 DENMARK Munters A S FARUM Tel 45 44 95 33 55 Fax 45 44 95 39 55
21. nection piece for dry air 62 5 mm L 70 mm Orifice plate to be used to obtain reduced airflow MG50 25 m h MG90 45 m h Wall Bracket Kits Includes items 1 2 3 amp 7 MG50 MG90 Hose for wet air 51 mm Specify length in meters when ordering 2 1 m hose and 2 hose clamps are delivered with the dehumidifier 2 Filter Cassette Wall pipe MG50 Outer Diameter 025 mm Wall pipe MG90 Outer Diameter 32mm 1 Humidistat with cable and connection plug Humidistat 1 The humidistat cable is included with delivery 2 Included with delivery Table 6 2 Accessory details Product Design Information gg 19026042 19026044 19030157 19030155 19026040 19030019 19030159 19026043 19030009 19026041 19030158 19026045E 19030042 M Munters 23 weg M Munters MG50 90 Dehumidifiers 6 7 Technical Specifications Technical data for Dehumidifier Process air Freeblowing air 50Hz m i Freeblowing air 60Hz m h Rated airflow m h Available static pressure 50Hz Pa Available static pressure 60Hz Pa Fan motor power kW Reactivation air Rated airflow m h 12 20 Available static pressure Pa 50 100 Fan motor power kW Reactivation air heater Heater power kW Temperature increase across heater C 100 97 Filter Filter EUS Article No Miscellaneous data Operating temperature C 20 to 40 20 to 40 Drive motor power W 5 5 Max noise level u
22. t be used When using a wall pipe see section 6 6 Accessories connected to the hose remove orifice A Process air The dry and process air hose may have a total length of up to 10 m without any significant effect on the dehumidifying capacity Reduction of process airflow in a ventilating system see figure 2 1 Connection to ducting In order to obtain the required low humidity when the space is ventilated with dry air open system the dry airflow should be reduced by fitting an orifice plate B inside the connection piece C for the dry air outlet This will increase the dehumidification capacity Installation 9 weg M Munters MG50 90 Dehumidifiers The accessories B and C are optional extras The connection piece C allows the dry air outlet to be duct connected Ai Orifice plate for wet air 5 once plate used ina erating syster Conrecton piece tor process air met E Connection piece for reactivation air intet E Wet air outlet 1 Item included with delivery Other items can be ordered as accessories see section 6 6 Accessories Table 0 1 Duct Functions Figure 2 1 Connection to ducting 2 6 Mounting units on the Wall The MG units can be placed on the wall in two ways using a wall bracket optional extra thus enabling optimized positioning of the wet and dry air outlets to meet any desired requirements 1 One is to have the unit s wet air outlet positioned
23. tallation delays 3 If the unit is to be put into storage prior to installation see section 2 3 Storing the equipment 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 packaging material to provide temporary protection for the unit during later transport to the installation location and during installation 4 Remove all packaing material from the unit check carefully to make sure that no damage has occured during transport 5 Any visible damage must be reported in writing to Munters prior to the start of installation The following is important if the dehumidifier is to be stored prior to installation e Place the dehumidifier on a horizontal surface Installation 7 M Munters Mantes 2 4 Location requirements NOTE 2 5 Duct hose connections 2 5 1 General MG50 90 Dehumidifiers e Protect the dehumidifier from physical damage e Store the dehumidifier under cover and protect from dust frost rain and aggressive contaminants The unit should be placed in a upright position inside or outside the dehumidifiered space and be at least 15 cm above the floor 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
24. ted to the mains supply by reference to the identification plate see section 1 4 Markings and has been correctly connected to the supply If a fused circuit breaker has been fitted check that the fuse rating in the circuit breaker is correct 2 Ifa humidistat has been installed check that it has been correctly positioned in the room and has been properly connected to the unit see section 2 9 Connecting the humidistat Stop the unit by pulling out the plug from the wall outlet or if it is permanently connected to the mains supply by operating the externally mounted circuit breaker Set the mode switch to the MAN position and connect the dehumidifier to the mains supply or operate the circuit breaker if fitted and ensure that the unit starts Figure 3 1 Location of MAN AUT mode switch For the unit to operate in the Automatic Mode an optional single stage humidistat must be installed and correctly connect to the unit 1 Set the mode switch to the AUT postion and adjust the humidistat set point to the minimum relative humidity RH value Operation 15 M Munters MG50 90 Dehumidifiers weg 2 Connect the dehumidifier to the mains supply or operate the circuit breaker if fitted and ensure that the unit starts 3 Slowly increase the humidistat set point until the dehumidifier stops This checks that the humidistat and the dehumidifier are functioning correctly NOTE Depending on the position of the link on the
25. th at least 25 mm of suitable insulating material Cover the duct opening with a net to prevent birds and vermin from entering the unit Place the duct opening so that rain and snow cannot enter the ducting Ducting for wet air should be corrosion resistant and able to withstand temperatures of up to 70 C The wet Air shall normally be transported outdoors At large sites where the dehumidifier is placed outside of the space to be dehumidified the wet air can be discharged in the vicinity of the unit Place the outlet so that wet air does not blow towards moisture sensitive objects The minimum distance between dry or wet air outlet and a wall is 0 5m The filters for both process and reactivation air can be changed with the ducting connected CAUTION Jr there is a risk of freezing temperatures the wet air ducting must be insulated 2 5 2 Ducting and airflow adjustment 190TGB 1004 F Reactivation air The dehumidifier is equipped with two orifice plates airflow restrictions in the reactivation air circuit One of which is located at the inlet to the reactivation air fan behind the filter and inlet cone This cannot be removed The second orifice A is located in the wet air outlet This orifice plate will provide correct airflow if a total of 5 m of hose is not exceeded for reactivation and wet air If the flexible hose exceeds 5 m max 10 m the orifice plate A and wall pipe optional extra canno
26. which is protected by copyright laws No part of this publication may be reproduced stored in a system 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 2005 4 Important user information MG50 90 Dehumidifiers Safety In this publication hazardous activities are indicated and preceded by the common hazard symbol publication to indicate a possible danger that could lead to personal injury An instruction is normally given followed by a short explanation plus the possible effect if the instruction is not followed WARNING is used in this CAUTION is used in this publication to indicate a possible danger that could lead to damage to the machine or other equipment and or cause environmental damage An instruction is normally given followed by a short explanation plus the possible environmental effect if the instruction Ze not followed NOTE Used to accentuate supplementary information that is required for problem free use or optimal use of the unit Conformity with directives and standards The MG50 amp MG90 dehumidifiers are designed and manufactured by an EN ISO 9001 accredited development an
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