Nortec Industries MES ElectrodeSteam Humidifiers User's Manual
Contents
1. MES U MES P SPARE PARTS LIST ELECTRICAL AND PLUMBING INI sos __ 1 SNApON jueweoeiday d SN Ey pro fesor pieog 809 d SIN L L L Jeqe dads ay pue japow Ajoyoe4 Jequinu ejes yun ay ajonb o Jeqe pueog au uo Jaquunu 1150009 yip ay ajonb pueog Od 1uaueoe daiJ 1 p10 0 god L eooe so egesney dem e Op OSOL e9 ieounoen Od vS9 2006 zy leomosg vs9 xooigjeuuue 6 zeoe zer Po oo ge Pp Pp r foszer esoquesis ze 0188 ZEL ujbue yoads IEULUON asoy 5 9 Pp L v L Lvl Ajquassy pseog Od Josues 1942M UBIH Se L L L 4 L V 660 esua7 pue Josues jeje uBH ve escszel jjopuejs pueog josues jeje UBH ec ozoe zer owon sond 1 _ _ dieppow ze esoeze 8 4 edo te y wioreoi Burqund pason 91 1 peso uwo c 6208 sp Buqung pasop 8 2 peso ez Jews ee pt eeibep 06 uorsseuduco OF B E zosi GE OL Bum oz voossb __ 82 ezoszer S 0988 zer Ayoods 0 MMI c dH eju zozer LH amp oo Picos zer 3100 Bude SAEA 2008 Srl S M98JOS SNE A a2. caused by foaming and or back pressure or leaking drain valve Cylinder is almost empty check for magnetic pull on drain solenoid indicating miswiring If no pull drain actuator is blocked open remove disassemble and clean If drain is occurring through activated drain valve valve is miswired or electronics are faulty consult factory If drain is occurring through the overflow on the fill this is due to abnormal restriction on the steam line and back pressure forces water out of the cylinder therefore water cannot concentrate and level must stay high review installation of steam line to ensure no blockages or excessive static pressure in air system DIAGNOSTIC PROCEDURES TROUBLESHOOTING GUIDE Unit Status Lamp Yellow ICON Symptom Corrective actions On On Maximum water level This usually happens on initial start up after replacing the cylinder inside cylinder normal Water is concentrated with minerals inside the cylinder Let unit run yellow light will disappear when the unit is at full output This may take a day or two Off Off No power to the Check for main power supply fault board Turn power switch to Drain position If drain valve is activated sound of solenoid check connection to the board or board itself When no sound present check fuse replace with 3 0 A if needed transformer voltage should be present between fuse holder and ground screw 1 flash Off E
3. defects in material and workmanship No warranty is made against corrosion deterioration or suitability of substituted materials used as a result of compliance with government regulations THE COMPANY s obligations and liabilities under this warranty are limited to furnishing replacement parts to the customer F O B THE COMPANY s factory providing the defective part s is returned freight prepaid by the customer Parts used for repairs are warranted for the balance of the term of the warranty on the original humidifier or 90 days whichever is longer The warranties set forth herein are in lieu of all other warranties expressed or implied by law No liability whatsoever shall be attached to THE COMPANY until said products have been paid for in full and then said liability shall be limited to the original purchase price for the product Any further warranty must be in writing signed by an officer of THE COMPANY THE COMPANY s limited warranty on accessories not of Walter Meier s manufacture such as controls humidistats pumps etc is limited to the warranty of the original equipment manufacturer from date of original shipment of humidifier THE COMPANY makes no warranty and assumes no liability unless the equipment is installed in strict accordance with a copy of the catalog and installation manual in effect at the date of purchase and by a contractor approved by THE COMPANY to install such equipment THE COMPANY makes no warranty and as
4. 163 91X5 CONFIGURATION 5 WITH CP CLOSED PLUMBING COVER REMOVED FRONT VIEW LEFT VIEW MES U MES P HUMIDIFIER z Nortec is Bea PHYSICAL DATA www humidity com J 244 PRIMARY POWER 24 VAC INPUT By Others PRIMARY ON OFF CONTACTOR CONTROLS 24 vac By Others E PRIMARY TERMINAL BLOCK O 187 insulated fast on provided with For field connection PVC unit HIGH WATER SENSOR PCB HIGH VOLTAGE ELECTRODE LEADS BY OTHERS OR INCLUDED WITH PVC UNIT CHANGE 2 LEADS CYLINDER FOR SINGLE LAMP PHASE 3 LEADS reo FOR THREE BEE PHASE TRANSFORMER MES U CONTROL BOARD STEAM CYLINDER NOTE SOLID LINES WIRING BY OTHERS MES U INTERNAL AND FIELD WIRING peer Nortec For PVC or LVC unit with remote or attached electrical www humidity com WIRING DIAGRAM number 150 6240 REV B Control Signal 0 10 V dc 2 10 V dc ON OFF Safties Primary po Os Terminal P Block by others Remote LEDs Yellow LED Green LED Yellow LED Green LED t Al Comm on me ne pr npanpnnpnnp Board 1509592 Install J26 For Modbus Control cr Calibration Do not ajust Capacity adjust m or 3 electrode cylinder mi NOTE Dotted lines denote wiring by others MES P with Optional Modbus board WIRING DIAGRAM DIAGRAM NUMBER DATE April 20 2007 www humidity com 13
5. A Nortec MES Electrode www humiditycom Steam Humidifiers Installation Operation Maintenance Spare Parts and Exploded Views Guide IMPORTANT Read and save this guide for future reference This guide to be left with equipment owner Form 08 111 Table of Contents INSTALLATION 1 RECEIVING EQUIPMENT s ko Eo a E a a AO a RT 1 PRINGIPAL OF OPERATION ah a a ae eae 1 WATER SUPPLY 2 WATER CONNECTION i ce e e e ELA nb a 2 START UP AND OPERATION LL 2 CAPACITY ADJUSTMENT LL 3 CYLINDER REPLACEMENT uso oor RR 64 e Gb oa ROB EORR 3 ek ES m Red 3 WHEN TO REPLACE THE STEAM CYLINDER doe go x Rx Re ERR RE on Rn 3 REMOVING THE OLD CYLINDER v s s ae RR RR RS m xx x ROS EOS e 4 INSTALLING THE NEW CYLINDER sees sse 4 MAINTENANCE 4 EXTENDED SHUTDOWN ii BR 4 OGG AES Eee EE 3 Y 04 OB R 4 TROUBLESHOOTING 4 TERMS USED ara Bs ak e a qeu a 4 STARTING POINT Lila ea oe RR we ee ee a 5 DIAGNOSTIC PROCEDURES TROUBLE SHOOTINGTIPS SOFTWARE REQUIREMENT FOR 8 PHYSICAL DIMENSIONS DIAGRAM lll s e sl ls sss res 11 WIRING DIAGRAM x uomo ko Reda mak WORSE OG Ge X e eod ROLE de ee Re e 12 SPARE PARTS awe
6. ON 40262 Disables the Enables the humidifier and humidifier places the humidifier will humidifier in operate based standby mode on the SET 255 inhibit actions of cold humidifier comma 0 allow normal operation input After a microprocessor reset the default setting for Output Control shall be OFF Set Output Sets the desired steam output from 40264 las O ae Remotely set humidity reading over network This value shall be zero after a a lead a microprocessor reset for N minutes reverts to 0 Force Drain When written to FF will interrupt 40276 the humidification process and activate the humidifier drain valve After 20 minutes the controller will 255 will start the process reset this value 00 0 will be accepted to clear if the request has not been After a microprocessor reset the cleared itself default setting shall be 00 Set MODBUS Change the humidifier controller s 40550 address MODBUS address The value changes will Range is 1 247 only take effect following a This setting shall be non volatile Li Or me with a default setting of 1 Set MODBUS Changes the humidifier s baud rate 40552 pane Fein Range is 4800 9600 and 19200 The value changes will B sec only take effect following a This setting shall be non volatile Li pus with a default value of 9600 B sec Set MODBUS parity Change the humidifier controller s MODBUS parity Range is None Even Odd This setting shall be non volatil
7. ctive at any time Contactor on 1 Fill valve on 2 Drain valve on 4 current and capacity calculations Maximum The rated maximum steam production 30802 production for the humidifier Value written into Unit type 40600 is also stored here Alarms The humidifier shall describe any faults 30364 Too long to fill Bit Allocation Excess Current Note More than one bit can be End of cylinder life active at any time No current Too long to fill 1 Excess current 2 End of cylinder life 4 No Current 8 Units Required by the control board for 40031 capacity calculations 0 0 1 0 LBS 1 KG Unit type Required by the control board for 406000 Depending on the setting in current and capacity calculations UNITS Modbus 40031 Hex value representing maximum unit capacity 100 fill off amps Unit voltage Required by the control board for 40610 Format is Hexadecimal current and capacity calculations numeration table see below Hex Unit Value Type 0 110 120 1 208 2 Unit phase Required by the control board for 40620 Bit Allocation Single phase 1 Three phase 2 Three phase 6 electrode 4 10 DIMENSIONS __ in cm REMOTE ELECTRICAL ATTACHED ELECTRICAL in cm 8 4 21 3 cm WEIGHTS DRY Dp 87 m EE NOTES 1 FOR HEIGHT OF 5 LB PVC USE HEIGHT OF 10 LB MODEL 2 PVC PRIMARY VOLTAGE CONNECTION 3 MODEL SHOWN
8. definitely as the drain coil could burn out Leave the switch in the OFF position and open the main external fused disconnect to stop power to the humidifier Close the shut off valve in the water supply line feeding the humidifier TROUBLESHOOTING TERMS USED F L A Full Load Amps Refers to amps listed on the humidifier specification label SHORT CYCLING When the on time of the humidifier is less than ten minutes upon a call for humidity To correct short cycling all humidifiers have a capacity adjustment which allows the output of the humidifier to be reduced to as low as 20 of rated output thus extending the on time required to maintain output FOAMING The phenomenon which can occur in water when the impurities already in the water reach an excess concentration as a result of boiling away pure water and the continued boiling action agitating the contained water The humidifier electronics are designed to prevent this occurrence although in extreme cases water will foam with little concentration making it necessary to have the drain time of the water contained in the cylinder increased Foaming is normally caused by short cycling a restricted drain or back pressure The foam generated in these instances is conductive and may lead to false full cylinder indication if the level of the foam approaches the top of the cylinder BACK PRESSURE The restriction of steam flow caused by long steam runs improperl
9. e steam hose clamp s and pull steam hose off vertically 7 The cylinder is now ready to be lifted out of the unit Figure 6 Plugs White Sensor Plug Sa un d Sensor Pin Cylinder HW QJ Cylinder Pin m Cylinder Pin Sensor Pin 3 Cylinder Pin TTT Cylinder Pin INSTALLING THE NEW CYLINDER 1 The reverse procedure should be followed to install a new cylinder The main disconnect is to be left open until the cylinder is completely installed and reconnected 2 Ensure that the cylinder mounting stubs are seated properly in the allotted side mounting slots within the unit 3 The white sensor plug on all units is for the sensor pin which always goes on the single pin offset from the others See Figure 6 4 Ensure that cylinder plugs are very snug on the pins 5 Replace loose fitting plugs loose plugs may generate enough heat to melt and destroy the plug and new cylinder plugs must be ordered MAINTENANCE WARNING The plumbing and electrical compartments contain high voltage components and wiring The access cover is attached with screws Access should be limited to authorized personnel only EXTENDED SHUTDOWN Before disconnecting power to the humidifier for a period of extended shutdown ALWAYS DRAIN the cylinder first Otherwise the electrodes are subject to harmful corrosion which drastically shortens the cylinder life Do NOT leave the switch in the DRAIN position in
10. e with a default setting of Even The value changes will only take effect following a hardware reset of the control board Reset Run Hour Counter Resets the humidifier controller s run hour counter to zero hours 255 will start the run hours counter process 0 will be accepted to clear the run hours counter Current damping Buffers the measured current From 0 to maximum depending on software ability Electrode current The value of the electrode current in Amps Hex value representing the humidifies current in amps Resolution 0 10 amps Example 015F hex 35 1 Amps Steam output Run hour counter Firmware version Humidifier state The current steam output in Kg Hr or LBS hr See UNITS Modbus 40031 The number of hours the humidifier has been in operation since the last time the run hour counter was reset The firmware version of the humidifier controller Describes the current state of the humidifier and it s I O s Contactor ON OFF Fill Valve ON OFF Drain Valve ON OFF Hex value representing the humidifies steam output in kg hr Resolution 0 10 kg or LBS Example 013B hex 31 5 kg hr or LBS hr Hex value representing the number of humidifier operational hours since the last reset Resolution 5 minutes Maximum count 5460 Hours Example 0700 2000 hours 30361 Packed BCD version 3 52 would be 0x0352 Bit Allocation Note More than one bit can be a
11. ed in the feed water line allowing service of the fill valve 3 Each unit is fitted with a fill solenoid valve located on the base drain pan Flow orifices are designed for water pressure from 30 to 80 psi and are protected by the built in strainer 4 For inlet water pressure outside this range the factory should be contacted See Water Supply and Plumbing section of this manual START UP AND OPERATION e Ambient temperature location for humidifier 41 104 F 5 C 40 e Relative humidity location for humidifiers 5 rh 80 rh Check to see that the unit is securely mounted on a level surface with the proper drain and water supply Check for correct voltage with appropriately sized service Check that the steam distributor steam supply hose and condensate line are correctly installed and routed back to the unit Ensure that the external control humidistat is located in an area to properly sense the relative humidity to be maintained by the humidifier and that the interconnecting low voltage wires between the humidistat and the unit s control terminal strip are in accordance with the wiring diagram Check all electrical connections for wires which may have become loose in shipping Components damaged due to loose connections are NOT under warranty Check electrode plugs to ensure they are pressed firmly onto the electrode pins Important Loose connections will cause overheating of the cylinder plu
12. f cylinder before 10096 F L A the fill valve shuts off via the sensor and fill boil fill boil cycle continues cycling off the red high water sensor light until the concentration becomes high enough to reach 10096 F L A The above described control process will then take over WATER SUPPLY AND PLUMBING 1 The fill valve is sized for an extended water pressure range of 30 to 80 psi 2 For cases below 15 psi add a pressure boost pump notify the factory and a fill valve with an oversized orifice will be supplied 3 For cases above 80 psi install a pressure reducing valve in the water feed line to the unit 4 With extremely dirty or muddy water sources e g some well sources ensure proper filtration by adding an external filter to the water line entering the unit Consult factory for accessories such as filters 5 DO NOT use completely demineralized water with this unit as it is the minerals that allow the electrode principle to work 6 DO NOT use a hot water source as it will cause deposits that will eventually block the fill valve orifice Figure 2 Bottom View of MES U MES P Unit 3 8 Cold Water Olive Connection 7 8 Drain Connection Use 7 8 1 D Hose From Factory WATER CONNECTION 1 A copper compression olive type coupling for 1 4 O D soft copper tubing is provided with unit and requires no soldering for the water connection to the unit See Figure 2 2 An isolating valve should ALWAYS be plac
13. gs possibly melting the plugs and or cylinder Open the isolating valve in the feed water line to the unit Make sure the humidistat is set high enough to call for humidification Turn on the main disconnect in the primary service feeding the unit and check that unit has power at the primary terminal block PUSH THE AUTO ON OFF DRAIN SWITCH TO ON Water will start to enter the cylinder through its bottom port and rise in the cylinder to a point determined by the solid state control circuitry It is not unusual upon initial start up for the water to fill the cylinder and cycle on the red high water sensor light The red light simply acts as a safety to shut off the fill valve and prevent over filling With the red light on the water in the cylinder will continue to heat and after a few minutes start to boil After the boiling action of the water has lowered the water level below the sensor at the top of the cylinder the red light will go out and the fill solenoid will again open until the cylinder is again full This cycling of the red light and fill valve will continue until the units full output capacity is reached after which the water level will automatically lower itself in the cylinder The increased concentration allows for lower electrode coverage while maintaining the same output When a stabilized condition is reached the water will be boiling close to the cylinder seam level The solid state circuitry will
14. m 1 Check for 24 Vac across terminals 18 and 26 on PC board 2 Jumper the humidistat on external control terminal strip If contactor operates then control system is at fault 3 The low voltage 3 amp fuse located in the control box could be blown 4 The contactor holding coil could be open or shorted 5 The switch could be defective Recheck that the auto on off drain switch is still at on If it is then shut off the main disconnect and check fuses or breaker of the main disconnect If they are serviceable turn power back on To test for a defective auto on off drain switch connect a wire from the fuse directly to terminal 6 on the external controls strip If the contactor activates the on side of the switch is defective If the contactor does not activate the PC board could be defective If the amp control fuse blows when the wire from the fuse touches terminal 6 on the external controls strip contactor holding coil could be shorted Replace contactor if necessary After the necessary components have been replaced and the contactor pulls in there is line voltage to the cylinder and the control sequence can begin Approximately 30 seconds after the contactor pulls in the fill valve coil should energize There is also a visible fill relay on the printed circuit board It is the one located farthest from the C T core The points on this relay must be touching in order for the fill
15. maintain the proper concentration in the cylinder by introducing short drains only when necessary If the cylinder is manually drained the above process will repeat itself Low Water Conductivity Should normalization of the unit be required immediately after start up the installer may speed up the process by artificially increasing water conductivity During a fillcycle the installer should dissolve half a teaspoon of table salt no more in a cup of water and add it to the cylinder by means of the fill cup attached to the plumbing section Open the plumbing compartment and add salt solution through cylinder outlet Excessive amounts of salt will result in erratic operation of the unit however normalization of the unit will occur automatically through the solid state control sequence CAPACITY ADJUSTMENT The MES U MES P series of humidifiers come with adjustable capacity AC PC boards These boards have a pot to adjust the output from 20 to 100 See Figures 3 and 4 Figure 3 MES U Adjustable Pot Adjustable Capacity Pot Figure 4 MES P Adjustable Pot CYLINDER REPLACEMENT After an extended period of operation in accordance with life expectancy information the cylinder is completely used as indicated by the red high water sensor light illuminated on the cabinet When this condi
16. oe ghee EE ON QU EE E Xll EUM a db 14 EXPLODED VIEWS DIAGRAM xoxo ok ou e Rok E Rex aa e 15 INSTALLATION RECEIVING EQUIPMENT Check packing slip to ensure ALL material has been received 2 Inspect box for damage and note on shipping waybill accordingly Co After unpacking inspect unit for damage and if damage is found advise shipper as soon as possible 4 Inspect unit humidifier to ensure it is the correct model phase and voltage If any are incorrect advise the factory or your local representative immediately NOTE All products are shipped on an F O B factory basis Any and all damage loss or breakage claims are to be made directly to the shipping company The NORTEC MES U MES P electrode humidifier is the culmination of many years of research and development in the electrode humidifier industry This unit has been built by skilled craftspeople and thoroughly tested before shipment and should if the following instructions are observed provide many years of trouble free operation FOR HUMIDIFIERS INSTALLED IN THE CITY OF LOS ANGELES A city of Los Angeles approved spring loaded double ball CHECK VALVE should be supplied and installed by the contractor on each of the potable water inlets to each humidifier Recommended valve manufacturer Watts Regulator phone 508 688 1811 model 7 size 3 8 NPT inlet and outlet Each drain line from these humidifiers shall be routed without di
17. ps or sags to terminate above the flood level rim of a City of Los Angeles approved indirect waste receptor No combustible materials shall be placed in the duct and or the air plenum PRINCIPAL OF OPERATION When the humidistat calls the cylinder fills to 10096 of the Full Load Amperage F L A or to the top of the cylinder whichever comes first See Figure 1 If it reaches 100 F L A the water heats and boils away to a level giving 8096 F L A Figure 1 CONDENSATE RETURN OPTIONAL lt STEAM HOSE ELECTRODES 1 INLET CHAMBER 2 FILL CHAMBER 3 WATER OVERFLOW CHAMBER SAFETY DRAIN IN CASE OF FILL VALVE CONTROL BOARD FAILURE CYLINDER SUPPLY DRAIN d CONNECTION OPEN TO ATMOSPHERE DRAIN CANAL An electronic timer uses the rate of amp fall to determine the water level The objective is to concentrate current carrying minerals in the cylinder so that a smaller volume of water is required to produce the rated steam output This achieves the longest life for the disposable cylinder because of minimal electrode coverage and use of less energy because the high concentration allows a minimal drain rate When 80 F L A is reached the fill valve will open refilling cylinder to 10096 F L A On occasion the drain valve will also come on if water level is too low indicating too high a concentration and the requirement for a dilution of the water in the cylinder If the water reaches top o
18. sumes no liability whatsoever for consequential damage or damage resulting directly from misapplication incorrect sizing or lack of proper maintenance of the equipment THE COMPANY retains the right to change the design specification and performance criteria of its products without notice or obligation Walter Meier Climate USA Inc 826 Proctor Avenue Ogdensburg New York 13669 Walter Meier Climate Canada Ltd 2740 Fenton Road Ottawa Ontario K1T3T7 Tel 866 NORTEC 1 Fax 613 822 7964 northamerica climate waltermeier com www humidity com walter Meier PRINTED IN CANADA i tee
19. tion is reached a new replacement cylinder is to be installed NOTE Red light may come on during initial start up but does not mean cylinder replacement See Start Up and Operation section of this manual Consult factory or agent for replacement Quote the cylinder model from the white 3 digit label on the Figure 5 Cylinder Removal cylinder or quote model voltage and serial number from unit specification label WHEN TO REPLACE THE STEAM CYLINDER The steam cylinder is disposable and must be replaced at the end of cylinder life Cylinder life is dependent on water supply conditions and humidifier usage Failure to replace the cylinder at the end of cylinder life may result in unit damage NORTEC is not responsible for any damages resulting from or attributable to the failure to replace a used cylinder see Manufacturer s Warranty REMOVING THE OLD CYLINDER SeeFigure 5 1 Turn off the water supply to unit 2 The old cylinder must be drained completely before removing This is done by pushing the auto on off drain switch to the drain position 3 When completely drained push the auto on off drain switch to the off position 4 Open the main disconnect during the entire cylinder change operation 5 The power wires to the cylinder are attached by cylinder plugs to the electrode pins on top of the cylinder Pull these plugs vertically off the pins See Figure 5 6 Using slot screwdriver loosen th
20. valve coil to be energized If the points will not touch after the built in time delay then the sensor input may be interfering To confirm remove the black and red sensor wires from the terminals 6 and 10 on the PC board Wait 30 seconds and if the fill relay points not touch then sensor should be replaced If they do not touch then the basic PC board could be faulty To confirm disconnect the red wire from terminal 18 and touch it to terminal 14 If the fill valve coil activates then the basic PC board should be replaced If it still does not activate then the fill valve coil should be replaced Having changed the necessary components water starts filling the cylinder and begins to submerge the electrodes Because of the high voltage across the electrodes the water can now conduct electricity Red Change Cylinder light on Water at top of cylinder This is a common occurrence on start up See Start Up and Operation section of this manual Water remains at high level and won t concentrate This is normal on cold start up and can be accelerated by adding maximum 1 2 tsp of dissolved salt to the cylinder through the plastic fill cup on fill cycle See Low Water Conductivity section of this manual If unit has been operating extensively observe for normal fill boil fill boil cycle no drain should be occurring If drain occuring check for leaking drain valve or back pressure Unit drains continually May be
21. xcess current Check drain valve operation drain time possible drain restric sequence Operating amperage tions ded 13096 of en ER E T Check if fill valve leaks not holding supply water drained from the Back pressure may also cause very conductive water conditions nini i Was the humidifier short cycling Check for short cycling Water conductivity too high 2 flashes in Off No current Check water level in the cylinder should be more than full If sequence detection for 30 not check fill rate 24 VAC voltage on fill valve terminals unit must minutes with be on with call for humidity green light steady on Verify fresh continuous call for water supply to the humidifier Leaking drain valve humidity can be at fault minerals blocking the plunger If cylinder is more than full check primary power connections to the cylinder continuity of wires to cylinder Are power wires connected to proper terminals on the cylinder Color coding Possibly wrong cylinder type Low water conductivity 4 flashes in Off End of cylinder life Check water level in the cylinder should be about full sequence change cylinder Check for foaming if water level lower or cylinder life shorter than expected Change cylinder clean drain valve Software requirements for Modbus RTU Modbus addresses AXXXX R W 3XXXX R Command Description MODBUS Details address Output Control OFF
22. y sloped steam lines elbows changing the direction of steam flow from horizontal to vertical without a drain leg any plumbing detail allowing the accumulation of condensate undersized steam line improper steam distributor downward air flow onto the distributor causing excess static pressure at the steam outlets or high static pressure ducts not probable To overcome excess static pressure in the duct a fill cup extension kit should be used In down flow applications a down flow distributor should be used but in some cases the fill cup extension will also be required RESET UNIT HUMIDIFIER To reset the humidifier the auto on off drain switch at the front of the humidifier should be switch to the Off position for a minimum of five seconds and then switched back to the On position MONITORED LEG Refers to the primary wire to the cylinder which loops through the current sensing devise of the main PCB This wire is terminated at the red cylinder plug at the cylinder STARTING POINT MES U Auto On Off Drain switch in On position unit will not fill When the on off control circuit is made and the auto on off drain switch is pushed to on the 24 volt holding coil of the primary contactor should energize The resulting magnetic pull closes the high voltage contacts with a distinct and audible clunk If the contactor will not make then inspect the following while referring to the wiring diagra
23. zro zer 49014 Durjjms ONSeid SALA rooze 9 seogze dueto buds esoH wojje o pue eweAueid Si 0988 BUS Ayoeds SOH MO jI9AO SOH 2009 ZEL ZOOSW Atz Aiquessy 109 0009 Spi Aiquassy pue Apog A sow zer sorm _ ques y 0188 zeL BUE 14 IEULUON uexd OL 9 05 J9ysem eueo ud 6 papeo7 Buds OmMVOL s o c em aziovser elovsel aci ser 090 ALLE Asoyoe4 ynsuoD Joec 1802 NOLLdlHO SIA 0 S7N S3AIN 0Z SLN SAIN UdL 0 SL N SAIN UdL 0L SN SIN da eqe Dads ay eDeyo pue jequunu elas jun ay ajonb Jo peoe deJ Bulag Ao ay uo Jequinu y6IP au eyonb 4epuiAo Japo 0 Japu o aud i pt O e E pt y L Eus Lo pt Lo O e pz e pz pt em pt pt e pt pt LEA NEN O e pt LE pt nil 14 LIMITED WARRANTY Walter Meier Inc and or Walter Meier Ltd hereinafter collectively referred to as THE COMPANY warrant for a period of two years from date of shipment that THE COMPANY s manufactured and assembled products not otherwise expressly warranted are free from
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