Home

Nortec 132-3091 User's Manual

1. fo fo fo fo i po fo fo fo i fo srorserl OW OLS v __ _ j j C i fo fo po fo fo fo fo fo i A1SSV QV dA 091 pepe i i i i fo fo po i i i i i fo fo fo i i Tose A1ssv YALAN 1 __ j j Q C i i i i i fo fo po i i i fo fo aoesc OMAN fo po fo i i ii ii i fo fo ann moma mvrsoivoaw w 802 009 0SS SEE 802 009 0SS eorom L 80Z enero emel EZ eorom enero KONO ME 08 war al aa al L fa EZS oreo RTT 8 L OZL OLL S 020 50 ao 1 i
2. e e e eoccr amas 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 2 2 2 3 e e e z 2 2 2 2 2 2 v 2 2 e OR EJ EE j AE j j l eae eee j j j C ji pipi _ i 1 ese eos __ 2 j fet j i j __ j of ww _ j j j j j EE __ LL LLL EL LLL LL E LL EL pee __ _ j pee uel _ tet i j j fol _ i f fol j j r S4 W3WHOJSNVHI _ e ee 9 eae EAS EPA Jj C ee 2 2 2 fo fo fo fo fo fo iii era ASS VOR SG ELE ses 3 3 PEJE j j ee NOSNJSN3IVMHOIH 9 __ EL LLL EL LLL LE I C r 2 j j jJ ves 2 fofefe
3. OOO X gt axm gt axm 2 ACTUAL BY OTHERS Ground Wire Ground L1 Dedicated Circuit Breaker L2 Or Disconnect Single Phase Unit Single Phase Supply Required Voltage Between L1 And L2 Load Balanced Ground Wire Ground L1 Dedicated Circuit Breaker L2 Or Disconnect L3 Single Phase Unit 3 Phase Supply Neutral Required Voltage Between L1 And L2 Load Will Be Unbalanced Ground Wire Ground L1 Dedicated Circuit k 12 us er Disconnect ES Single Phase Unit 3 Phase Supply Mental Required Voltage Between L1 And Neutral Load Will Be Unbalanced Ground Wire Ground 11 Dedicated L2 Circuit Breaker Or L3 Disconnect Neutral NOTE Voltage At Terminal Block Must In Accordance With Spec Label 3 Phase Unit 3 Phase Supply Required Voltage Between Any Two Legs Load Will Be Balanced gt m 2 All Wiring To Be In Accordance With Existing National And Local Electrical Codes 6 PRIMARY LINE VOLTAGE WIRING TO UNIT Ground Leg 2 Pole Terminal Block Ground Leg 2 Pole Terminal Block Ground Leg 2 Pole Terminal Block Ground Leg 3 Pole Terminal Block 5 Field wiring connections for modulation control to be made to external side of terminals 26 28 30
4. gt ses es LLL LL Lo jJ C 2 2 2 2 z fo oss ano ss 53480 j j C __ LL LLL LL j LLL j 2 2 2 2 ___ 3SOH Td 25 j AAA EE SEA E 8 EE l ee NE 2 2 fo po fo fepofo omes 214 1HOIVMIS B E 99 ________ 2 2 fo fo fo i i i i Teese NSHSVM v SSVMg ss pt tt te LL LL LL ______ gt 2 2 2 2 z 2 2 z 2 2 z z 2 2 z 2 2 2 2 z 2 2 2 2 2 2 z z 2 z z 2 vosse smauos SATA v9 j j jj j j 1 j j j qo E fo fo fe ee iii ii i i i i i i i oves 1asv9 S EE LE LL LE j j i
5. _ sao pt tt tte ij ij j s anv pt i vezers ATSSV 29 O A A O ponin ma soci __ ___ ers 31avsna Le 138 71 AYJOLIV3 724465 IHL 39 L 10A 1380W 4H38WfN VISAS LINN 1105 2 3LOND YO G3SV 1d3 9NI38 TAD 3H1 NO 38IARN LISIG 3HL 3LOND SH3QNITAO LN3IN3SV 1d3 43880 OL e U E T T Ep a ooo E ipo dE LE E merl moll L ET EZ s soo Tl IL Tp ECE E LI EZ rm TI a ECO TI E E Cuero i aL wll LEL Saa EL I EL ues EL e wefl E S wel EL reel EL Sew go oso oo o 0090 0500 10 1 3SVHd 338HH L N d ON STAGOW ONWHN dHN qHN SLYVd LIN3N39V I43 ONISNN Id i i i x j
6. vos tet fol ofrfefzfofe fefofofol Y j Lp ee vocas 109 MO HOLOVINOO EJ 3 j AA j i eses veda JOVIIOAANVWRid y __ ______ j j ja nervo __ jaja j j jai _________ __ eey feje 1212 2 jejejeje jeneece r Jefe feje jejej Jefe jeje jeje e ejeje LIOA AYVINIRid _ __ j ji ij sral 2 Pope fofel j eee seras LL rir fofol j eee wrea _ Nrrdz LIOA AYVINIRid IWNOLLdO ggg j j j j s _ LLLI j _ De CE CE L E ji j VS6 d Govi1on
7. _ tet te i EC EA O AO AO O AO AO MO i i VS6 dz V OI III JNNIN I OI P N 5 I NIN NIN IO ININ IN TO E S AIPINIOCTATRINONTOTITAITRINONLTOITAIRINONTOTOAIRIOTOIAIRIONLTOCI LT ARI OTOCTAIR IRIN INIO O IN TR O O O O O JO O O jO JO JO JO JO JO JO JO JO JO O JO O JO JO JO O JO 1 1 1 1 1 1 1 1 1 I 1 1 1 1 1 1 1 1 1 1 1 I weas O INI ICO IO IT O IT IN O O IN 5 INIO TRIN TOTO IN IN O Ts Z gt Z N OO oO TO S OI O OI O OI O O O o w O O O Fw O O Fw O wojo O Fw O O FW O wijo j j gt I 2 LO parar N d 3SVHd ASVHd 3T9 NIS n NOILdld5S3Gd S 1300 SLYVd LN3IN3OV 1d38 1VOldL23 13 o e LO o O N o N o e O N O LO o e LO
8. i i i fo fo fo i i i j see __ ili i iji i __ j Lo Lo Lo ji fo fo fo i i ses __ fo TV9RIL9313 _ 431 j l j j j j 5 j e j j j See j j j j Q S N fo fo Po fo fo i fe fe ili i i fo fo fo fo fo i fo AR ez __ ggg ll LLLI LI Lo Q jJ j __ TVNOILdO 2 fo Po fo po i fo fo fo i fo i i i zocz 19078 TVNIN331 LL j Lo 4 WNWHN dHN Alojoey TANVd S9DVAYALNI 43S _____ 8HN 8HN EAN 2 pz fo fo fo fo fo i fo NIN
9. ON ASVHd 338H L ASVHd 3719NIS mw NOILdl 5S3d S 1300 OINHN dHN qHN SLYVd LNIINIIVId3Y4 TIVOId194313 O LO e e e e O N e e e 0 LO e 33 __ 14 moon 2 2 z 2 2 fo fo fo ii i ij i i _____ A1SSV 3934 AIVA 279 _ 3E E 34 535 j j jj SRR j j PAE j j J j _ 27 7272 iii iii i i i i i AISSV 3NTVA 79 __ AAA E305 jj j Q CIN 2 z iii ii iii i i i i ij i i coe 2 2 2 29 __ _______ 2 pz fo fo fo fo fo 12 TANT THIS 29 ptt _______ 13089 1311nO 115 19 2 2 2 z fo fo fo fo
10. 32 humidifier s control terminal strip Always refer to the external control s wiring diagram factory supplied with each NORTEC modulation control option 6 Varying dc Voltage Modulation Signal Powered by Others NHMC NHP Series humidifier can be factory configured to accept the following vdc signals 0 3 vdc 0 10 vdc 0 16 vdc 0 20 vdc 1 5 vdc or 2 10 vdc Wire according to NORTEC supplied external wiring diagram that comes with each modulation option To share the signal with more than one humidifier wire in parallel to each humidifier If a different signal is desired consult factory 7 Varying dc milliAmp mA Modulation Signal Powered by Others NHMC NHP Series humidifier can be factory configured to accept a standard dc mA signal if pre specified Wire according to NORTEC supplied external wiring diagram that comes with each modulation option Choose from 0 20 dc mA or 4 20 dc mA To share the signal with more than one humidifier consult factory 8 Varying Resistance Modulation by Others NHMC NHP Series humidifiers can be factory configured to power a 3 wire varying resistance modulation humidistat by others if pre specified Wire according to NORTEC supplied external wiring diagram that comes with each modulation option Choose from 0 1350 0 500Q or up to 0 10000 To share the signal with more than humidifier consult factory OPTIONAL MODULATION CONTINUOUS CONTROL PACKAGES BY NORTEC 1 Mo
11. K1T 317 A WMH COMPANY PRINTED IN CANADA
12. A CONNECTION pp 030 OR SMALLER RESISTOR ER DOWN OPTIONAL 1 TRANSFORMER INTERNAL 44 S SIS DOOR 2 FUSE BLOCK INTERLOCK e 050 1 SWITCH ORLARGER 14 1 CONTACTOR S 4 i FILL m 1417141 24V VALVE cot I l COL 1 DRAIN VALVE STATUS INDICATOR NHMC MAIN BOARD c w PIGGY BACK BOARD X4 LCD DISPLAY OPTIONAL LCD KEYPAD DISPLAY Si 1 3 15A FUSE Si 2 3 15A FUSE s INTERNAL EXTERNAL RS 232 NHMC HUMIDIFIER w OR OPTIONAL BLOWER BUILT ON OR REMOTE www humidity com WIRING DIAGRAM NO 94 0 A REV 10 OPTIONAL BLOWER PACK BUILT ON OR REMOTE TRANSFORMER IF REQUIRED FUSE INTERNAL DEDICATED DISCONNECT BY OTHERS GROUND BLOWER PACK TERMINAL BLOCKS EXTERNAL OO INTERNAL PRI TERMINAL BLOCK OR OPTIONAL FUSE BLOCK NHP TRANSFORMER 2 030 SMALLER CONNECTION ETE CREF SE l STEP DOWN OPTIONAL l I TRANSFORMER INTERNAL 413418181 DOOR FUSEBLOCK 1 17 T INTERLOCK NHP 050 SWITCH OR LARGER 24 V COIL m CONTACTOR S 2AN_ COIL 7
13. 2 HIGH WATER SENSOR RED WIRE gt INTERNAL EXTERNAL Nortec www humidity com TWO SPEED SWITCH g JUMPER OR OPTIONAL OPTIONAL REMOIE MODULATION CONTROLS YELLOW SEE EX W D 0 INDICATOR ON OFF IN SERIES SIATUS INDICATOR RESETABLE THERMODISC N C OPTIONAL BLOWER PACK T MOUNTED ON OFF HUMIDISTAT or JUMPER 32 30 28 26 61 20 62 40 63136 BE NHP MAIN BOARD c w PIGGY BACK BOARD OPTIONAL CAPACITY OUTPUT INDICATOR Si l 3 15A FUSE Si 2 3 15A FUSE Sx MANUAL CAP ADJUST ts DRAIN FACTOR ADJUST NHP HUMIDIFIER w OR w o OPTIONAL BLOWER PACK BUILT ON OR REMOTE WIRING DIAGRAM NO 95 0 REV 8 z Nortec NH Electric Steam Humidifier www humidity com Humidifier Mandatory Pre Start up Checklist p 1 of 1 Unit Serial of humidifiers Tag Unit type Voltage V ph Steam output Ibs hr Customer Job Address Inspected by Date of inspection WATER QUALITY Well water City water 0 softened wate RO DI water 3 Conductivity mhmos Hardness gr HUMIDIFIER MOUNTING Clearances around the unit Acceptable Obstruction Front door opens freely 3ft min Top steam lines 2ft min Bottom fill drain controls 2ft min Right main pwr 2ft min STEAM LINES CONDENSATE LINES Slope up 2 per 12 O Slopped back to drai
14. LLL jJ C jJ C C 2 fo Po fo fo fo i fo o morser SHY ________ RRR EAE SRE j j j j j jJ C jJ C LLL j apa fo te po fo po fo fo i i i i o orosze LLL jJ C jJ C LLL j Lo 2 poo vwawsowwom gt 2 2 2 2 2 2 z 2 2 z z 2 2 2 2 2 2 2 z 2 z 2 z 2 v e 2 z e ____ 89 SEES muwu 2 2 2 2 2 2 2 o woo ONO BATWA FIEIS SISIEISISISIEISISISIEISISISIEISISSIEISISISIEIS E ES SISISISISISISISISISISISISILCISISISISISISILSISISISISISISISISICISINISISTEICISINIEIS 2 IS O INI IOS IO 5 IN lo O IN IN IO NN Jo IN 5 IN jojo INIS 29 in IN INIO T eoloeisliz lieleisislieleisialieleisialelelislialeleisliaslieleisialelelxixisixliel el zxixisix nmJlz oeojoejoelejoeljeoeljoejieljeljeljel
15. Steam distributors can be in vertical or downflow applications Proper location should consider air temperature relative humidity before the distributor air velocity dimensions of the location amount of steam introduced into the duct downstream obstructions and surfaces vulnerable For installation details please refer to steam distributor installation manual located in the distributor box Form XX 231 For calculating absorption distances refer to H E L P Software or steam distribution and absorption distances engineering manul Form XX 232 PLUMBING All water supply and drain line connections should be installed in accordance with local plumbing codes WATER SUPPLY LINE 1 Humidifier is intended to operate on potable cold tap water If the raw water is very hard NORTEC can provide longer cylinder life on softened water However softened water is more conductive and more corrosive Some hardware and or software changes may be required at time of order or in the field Consult factory If RO or DI is available blending may increase cylinder life Consult factory DO NOT use a hot water supply to humidifier Minerals will adhere more easily to surfaces and the fill valve s small flow regulating orifice and could become plugged Standard fill valves are sized for water pressure ranging from 30 to 80 psig ideally 55 to 60 psig For other pressures consult factory This pressure should be
16. 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 NORTEC 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 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 assumes 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 Nortec www humidity com Model Serial Cylinder Cylinder Last Replaced MTH DAY YR MTH DAY YR MTH DAY YR L NORTEC INDUSTRIES INC NORTEC AIR CONDITIONING P O Box 698 INDUSTRIES LTD 826 Proctor Avenue 2740 Fenton Road Ogdensburg NY 13669 Ottawa
17. main PCB b If no current is present determine the cause of the primary voltage interruption If there is little or not water in the cylinder turn the unit off and disconnect the steam line at the cylinder Reset the unit and monitor filling a If unit fills and Error 5 does not reoccur the problem was likely caused by air flow through the fill system and can be permanently corrected by installing a U trap on the fill line between the fill cup and the drain valve body b If unit does not fill then turn the unit off and clean and check the drain valve refer to section on Mandatory Cleaning of the Drain Valve in this manual to ensure that there are no obstructions or leaks in the drain valve preventing it from holding water in the cylinder and check water inlet for obstructions 4 Turn unit back on and see if it will fill a If unit still does not fill then with the unit turned on check for 24 VAC across the fill valve there must be a call for humidity b If 24 VAC is present then the problem is with the fill valve 18 C If 24 VAC is not present then check for 24 VAC across 6 and 14 on the PCB d If 24 VAC is not present across 6 and 14 of the PCB then the problem is with the main PCB e If 24 VAC is present across 6 and 14 of the PCB then check for a break in the circuit to the fill valve Response See Figure 2 NHMC NHP System Messages 7 Output Too Low Error 6 oymptom s Diagnose
18. parallel to floor Then lift up slightly and out To reinstall door hold parallel to floor and insert hinge pins at bottom Figure 2 Clearance Requirements O WITHOUT BLOWER O TOP VIEW mom MIN 36 SIDE CLEARANCE RECOMMENDED SEENOTE NOTE LOCAL AND NATIONAL CODES MAY DEVIATE PLEASE CONSULT APPLICABLE CODES FOR CLEARANCE REQUIREMENTS IN ALL CASES MIN 36 FRONTAL CLEARANCE LOCATION amp MOUNTING HUMIDIFIERS NH Series humidifiers are designed to mount on a suitable wall or vertical surface Do not sit on floor due to clearances required for plumbing electrical and control entrances The clearance dimensions shown in this manual are for reference only and are the minimum required for maintenance of the humidifier Local and National Codes should be consulted prior to final location and installation of the humidifier NORTEC can not accept responsibility for installation code violations 1 Location of the humidifier should be below and as close as possible to the steam distributor location as possible 2 For front and side clearance requirements for access during installation maintenance and troubleshooting see Figure 2 3 If possible DO NOT locate humidifier any further than absolutely necessary from steam distributor location as net output will be reduced as a result of heat loss through steam hose see Engineering Manual Form 163D Also increased static pressure ma
19. pressure over 80 psig If water pressure is correct verify fill valve body orifice consult factory If filling too slowly look to probable causes described under Error 3 later in this manual Check rate with steam line disconnected Manual drain rates of suspect units should be checked using Figure 18 as reference times Figure 18 Manual Drain Times PROPER TIME sec TO DRAIN MANUALLY FROM SEAM TO EMPTY CYL SIZE SERIES BEIGE BODY DRAIN VALVE 500 600 400 300 200 2 minutes and 52 seconds 10 sec 1 minute 20 seconds 5 sec 43 seconds 2 sec 25 seconds 1 sec If time measurements are longer repeat with external drain disconnected and draining into a pail to know if external drain is impeding flow Clogged strainer and or clogged drain valve will cause shortened cylinder life But start by determining what caused the strainer and or drain valve to clog in the first place Do not assume that if strainer and or drain valve are clogged that they are to blame If the external drain has been impeding flow then waste accumulates resulting in a clogged strainer and or clogged drain which in turn results in shortened cylinder life Clean the drain valve start with a fresh cylinder Then measure the manual drain time with and without the external drain connected Is the external drain impeding flow NORTEC recommends an open external drain line See Form XX 161 NHMC
20. spots in drain lines will accumulate sediment and cause backup The drain line should be 7 8 O D copper pipe or larger Do not use plastic pipe for drain lines Consult factory Figure 7 Drain Connection Clamp And _ 1 5 1 D Hose Factory Supplied Stainless steel Reducer To ServeAs Funnel Drain By Others 2 O D StainlessSteel Pipe Or2 D DI Compatible Hose Not Supplied NOTE Steam hose should not reach bottom of the funnel STEAM LINE AND CONDENSATE RETURN LINE 1 Refer to the installation manual of the steam distribution system used in your application Steam Distribution Form XX 231 SAM e Form XX 249 Blower Pack Form XX 239 ACCESSORIES FILL CUP EXTENSION KIT S 1 The NH Series humidifier is an electrode humidifier It produces steam at atmospheric pressure Pressure head must develop to push steam through supply line and into air duct Combined resistance of duct positive static pressure and steam line resistance creates a small pressure head in steam cylinder Total amount of positive static pressure head is reflected directly by water column differential that develops between water in the fill cup hose feeding cylinder and water level in cylinder Standard dimensions of humidifier limit static that can be tolerated before water will be pushed high enough to spill over into overflow tube in fill cup assembly 4 increase allowable water column al
21. ED BLOWER PACKS BOBPS RMBP S 15 TROUBLESHOOTING 15 STARTING POINT Eus kom ee ee EOS UE POR 8 UE 40 15 USING THE WIRING DIAGRAM E dem a8 oo 9 m Ro ss m om RR 21 TERN O U ED ee Hee hee sa 22 WIRING DIAGRAM a xa mox 6456 mx Q e GaSe eS EDS SE BOE 23 25 PRE START UP CHECKLIST uuu 26 START UP CHECKLIST AND QUICK REFERENCE 27 MAINTENANCE 5 2 OO os 28 29 REPLACEMENT PARIS 26468 eGR 4 ot b 9 5 x d eom mox om EE BH 30 35 INSTALLATION RECEIVING amp UNPACKING EQUIPMENT Check packing slip to ensure ALL material has been delivered material shortages are to be reported to NORTEC within 48 hours from receipt of goods NORTEC assumes no responsibility for any material shortages beyond this period Inspect shipping boxes for damage and note on shipping waybill accordingly After unpacking inspect equipment for damage and if damage is found notify the shipper promptly All NORTEC products are shipped on an F O B factory basis Any and all damage breakage or loss claims are to be made directly to the shipping company PRE INSTALLATION CHECKPOINT Ensure that available voltage and phase corresponds with humidifier voltage and phase as indicated on humidifier s nameplate label see Figure 1 Ensure that the dedic
22. ION 7 INTRODUCTION dae aa om 7 LAYOUT AND FUNCTION ce Gee we ee bea et a 7 NHMC 8 SIARI UP SELF TEST coros sc w Q Q 3 w X AAA 8 J F LEVEL sae ee eh URS ROME EEG Ree eee 9 INFORMING THE USER 9 SELF HELP 9 SYSTEM MESSAGES Ak 9 REMOTE INDICATION m swe cmo com XO ode ode WR XO Q JQ Re EU 6 te 9 DOUBLE UNIT OPERATION 9 NHB NHP OPERATION ww Ge EE O39 XL a 9 END OF CYLINDER LIFE beam 9 MANUAL CAPACITY ADJUSTMENT 10 OTHER POTENTIOMETERS 5 40x 4e oom Rock xo w dG eae 3 RON ko xc wx Xo SER a 10 DETECTING WATER SUPPLY DEFICIENCY daw GOs ox wwe ox ow 3 x x 10 REMOTE INDICATION 10 DOUBLE UNIT OPERATION 10 BLOWER PACK OPERATION r a 4 4 ES s osos o os 3 10 MAINTENANCE 10 WHEN TO REPLACE THE STEAM CYLINDER RUSSIE oe eee ees 10 HOW TO REMOVE THE STEAM CYLINDER 13 MANDATORY CLEANING OF THE DRAIN VALVE 13 HOW TO INSTALL THE REPLACEMENT CYLINDER 14 BUILT ON AND REMOTE MOUNT
23. ISN AVE eee j ee gt pee i i i i ii ii fo fo i i fo i i i ee 1901304431 i i fo i fo i ili fo i i a NOW Zr LLL fo fo fo fo ___ Le 2 fo fo fo fo Ee 2 fo fo fo fo v __ emm Ee 2 pz fo fo fo fo fo fo LIS od asna vi LIS od asna VU oos 2 fo fo fo fe fo fo fo fo fo i r r i i soe zis asna __ j j j fo fo fo fo i i i fo fo fo fo i fo oorse
24. MC Error Message 5 Excess current similar to NHMC Error Message 1 Change cylinder end of life similar to NHMC Error Message NHB will shutdown on this fault In all cases when an error is detected there will be 24 VAC potential 100 mA max available at terminals 20 and 61 of the internal external white terminal strip BLOWER PACK OPERATION Blower packs are equipped with a control thermostat mounted on the steam distributor As soon as humidifier generates steam the contact is closed and the fan is started When steam is no longer being generated the fan cuts out with a delay If blower packs get overheated malfunction of the air circulation the manual reset safety thermostat interrupts the steam generation To reset switch off the humidifier and wait until the steam distributor cools down Then remove left hand side intake air filter and using a screwdriver press the reset button marked with a red dot inside the blower packs Units are equipped with speed select switch The switch is located on the right hand side of the blower inside the blower pack To access the switch remove right hand side intake air filter To avoid condensation on the cabinet parts run blower pack on high speed when humidifier delivers 75 Ibs hr or 100 Ibs hr of steam MAINTENANCE WARNING The plumbing and electrical compartments contain high voltage components and wiring The access door s is equipped with a lock Access sh
25. NHP The self diagnostic system built into the NHMC is continually checking the status of the electrical circuits to the fill valve drain valve primary voltage contactor high water sensor and steam cylinder The modulating signals from external humidistats and reduced manual capacity settings are taken into consideration When problem symptoms are found the NHMC NHP will take self corrective actions if applicable It will if necessary respond by shutting itself down The NHMC NHP communicates its findings to the user by way of the unit s status lamps and signals sent to the terminal strip for optional external remote indication Even more directly the NHMC has an alphanumeric system message to the user via the LCD liquid crystal display All of this is summarized for each system message in the following easy to follow format Explanation of System Messages Responses EPROM 2 XXN 1 Maximal Level Shown on NHMC LCD display only Symptom s Diagnosed Water has reached the top of the cylinder and activated the high water sensor circuit This is not an error or fault diagnostic Note This is normal on start up and at end of cylinder life before Error 4 shows Probable Cause s Normal on startup with a new cylinder or a cylinder that has been completely drained because of an extensive off period Can last for several hours until the water in the cylinder has concentrated or the electrodes c
26. ONTACT RELAY 1 Provides 24 VAC to 61 20 and external optional yellow lamp at control strip to simulate a fault DRAIN VALVE Observe 24 volt solenoid activated on drain valve INLET VALVE Observe 24 volt solenoid activated on fill valve CONTACTOR Observe 24 volt coil activated on contactor OR fan activated on blower pack if present CONTACT RELAY 2 Provides 24 VAC to 63 36 and external optional red lamp at control strip to simulate cylinder spent CONTACT RELAY 3 Provides 24 VAC to 62 40 and external optional green lamp at control strip INTERNAL TEST Completion of self test AMP R Observe green and yellow lamps pulse on together as sign that all passed L GREEN YELLOW INTERNAL TEST STEAM OUTPUT Begins normal operation and INTERNAL TEST displays Ibs hr NOTE If cylinder water reaches the full cylinder sensor the LCD will read MAXIMAL LEVEL USER LEVEL The keypad has four keys MENU ENTER Each time the user presses the menu key the microcomputer will display on the LCD the next operating parameter on the menu The basic display will read Steam output Ibs hr Capacity demand Limited capacity Control signal y The display loops back to the top of the menu the next time the user presses the menu key As NORTEC software updates are incorporated new parameters will automatically be added to the menu INFORMING THE USER The
27. R m OPTIONAL FUSE B TRANSFORMER BLOCK NHB 3PHASE 030 OR SMALLER MAN SWITCH CONNECTION 2a l a T i 7 STEP DOWN OPTIONAL 1 I TRANSFORMER FUSE BLOCK 9 RIR DOOR INTERLOCK NHBO50 I ORLARGER 1 SWIICH 24 V i I CONTACTOR S o E p C MENTE E ir 1 COL NE 1 1 1 SENSOR I 3n STATUS INDICATOR LED s RED WIRE 1 NHB MAIN BOARD Si 1 3 15A FUSE Si 2 3 15A FUSE Sx MANUAL CAPACITY ADJUST INTERNAL EXTERNAL NHB HUMIDIFIER lt or w OR w o OPTIONAL BLOWER PACK pe BUILT ON OR REMOTE www humidity com WIRING DIAGRAM NO 92 0 A REV 9 OPTIONAL BLOWER PACK BUILT ON OR REMOTE RESETABLE TRANSFORMER THERMODISC IF REQUIRED 3A HIGH FUSE Sp FAN 24 THERMODISC N O OPTIONAL BLOWER PACK RELAY MOUNTED ON OFF HUMIDISTAT XX sey 2 zm BLOWER PACK E CT OPTIONAL YELLOW GREEN TERMINAL BY OTHERS JUMPER OR MODULATION AND RED BLOCKS ON OFF S SS GROUND oe 5 SEE EX WD INDICATORS 7 CR EXTERNAL pela id 9 9 OOOO 181 800 32 30 28 26 61 20 62 40 63 36 PRI TERMINAL PLE _____ BLOCK OR TRANSFORMER OPTIONAL FUSE 3 PHASE bu S BLOCK NHMC
28. Reassemble tighten actuator 1 4 turn past hand tight 10 Clean out the end of the hose then reconnect it to the drain valve body with the clamp 11 Fit mounting screws through drain valve body one through ring terminal on green ground wire 12 WARNING To prevent the possibility of electrical shock the green ground wire must be reinstalled before power is restored 13 Push the two slip on terminals back onto the two tabs on the coil The terminals although not identical are reversible HOW TO INSTALL THE REPLACEMENT CYLINDER 1 Reverse procedure should be followed to install new cylinder Main disconnect is to be left open until cylinder is completely installed and reconnected 2 Ensure that cylinder is secured properly by the re usable tie wrap and mounting brackets within the unit 3 cylinder plug wires are color coded in accordance with colored dots beside the electrode pins on top of the cylinder 4 This color coding must be adhered to when replacing cylinder plugs on pins 5 With cylinders having six primary voltage cylinder plugs it should be noted that there are two of each color 6 Care must be taken so that cylinder leads of the same color are always directly opposite each other as indicated by the dot formation on the top of the cylinder 7 The white cylinder plug on all units is for the sensor electrode which always goes on the single pin surrounded by a plastic shoulder 8 Ensure
29. able at each of three terminal pairs 61 20 62 40 63 36 for activating yellow green and red lamps ordered as options from NORTEC or for powering field supplied resistive loads such as lamps DOUBLE UNIT OPERATION Turn both switches on During start up self test both sides respond to the self test together Watch for the lamps to light and the drain fill and contactor to energize as described on page 15 The LCD however only indicates the left circuit 1 After the self test the LCD will display the steam output for the left side 1 and both sides will operate normally To alternate between parameters for the left side 1 and parameters for the right side 2 press the Enter key Use the MENU key to see other parameters besides steam output To display steam total output for both sides press the enter key until gt is displayed When a fault occurs on the right side of the double unit both sets of lamps and remote relays will come on indicating that a fault has occurred The left master will display its own faults The LCD will indicate which fault has occurred and on which side of the unit 1 or 2 The side not faulted will continue to operate as usual Display is not available for the right side 2 if the left side is switched off NHB NHP OPERATION END OF CYLINDER LIFE When the cylinder is used up and water level can no longer stabilize below full cylinder due to fully coated electrodes the y
30. ace cylinder or normal startup operation ON Operation fault The prerequisites for getting power and water into the steam cylinder are as follows on off drain switch must be switched on control circuit 8 10 must be made modulation humidistat if present must be calling control circuit 82 83 must be made control circuit 84 85 must be made cabinet mounted humidistat if present must be calling door interlock switch must be made interlock switch can be pulled out to operate unit Most water does not contain enough conductivity for full boil on initial start up Units will need to concentrate the water over a time period hours to days During this process both lights are on NHMC OPERATION START UP SELF TEST Observe the LCD display when the on off drain switch is first pushed on The microcomputer pc board will check the system components display in words what it is doing and provide a message if any faults are found The start up self test sequence will be displayed as follows LCD EXPLANATION COMMENTS WHAT YOU READ CONDAIRMATIC MC Note the V number It tells you the EPROM version NORTEC V2 CONDAIRMATIC MC Note the model type Ensure NHMC model type compatibility with spec label name plate Can be reconfigured if necessary SYSTEM TEST LAMP GREEN LAMP YELLOW Test begins Observe green signal light on Observe yellow signal light on C
31. an no longer provide rated capacity or adjusted capacity Water level automatically rises to seek out fresh electrode surface to meet the demand Unit Takes Self Corrective Action Yes It stops the fill valve to prevent overfilling 2 Excess Current Error 1 Symptom s Diagnosed Current drawn on monitored primary lead to cylinder has reached or exceeded 125 of its rated amps The unit will have tried to self correct prior to system shutdown by draining water from the cylinder or 16 de energizing the contactor momentarily while it drains Probable Cause s Cylinder water is over concentrated too conductive due to restricted drain short cycling by controls supply water not within acceptable limits too conductive improper fill rate incorrect cylinder being used Water level too high due to leaking fill valve excess condensate return from steam line Corrective Action Note water level Manually drain cylinder while checking drain rate refer to Figure 7 for proper drain times If too slow correct cause Turn unit back on and check the fill rate 1 1 1 2 inches per minute Once set point is attained monitor cycle time Response See Figure 2 NHMC NHP System Messages No Current Error 2 oymptom s Diagnosed Full cylinder MAXIMAL LEVEL detected with no current draw sensed by the electronics on monitored primary lead to cylinder Probable Cause s No current being dr
32. ated external disconnect is of sufficient size to handle the rated amps as indicated on the nameplate label Refer to local codes Figure 1 NH Series Humidifier Condensate Return Steam Outlet Power And Control Nameplate Wiring Label Drain Water Supply 3 Report any discrepancy immediately BASIC HUMIDIFIER CONFIGURATION NORTEC humidifier models NHMC NHP and NHB share a modular sheet metal cabinet Each unit has a right side electrical compartment Each electrical compartment has a hinge down front door which is removable from any partially or fully opened position Each electrical compartment has a screw mounted right side cover which can also be removed for ease of electrical connection For safety the door when closed keeps the side cover from being removed Single units have a plumbing compartment attached to the left side of the electrical Double units have a second plumbing compartment Each plumbing compartment has hinge down front door which is not intended to be removed For safety the door must be closed in order to engage the shared lock To avoid any danger never operate the humidifier with a door off For safety each door when closed engages its own safety interlock switch All switches must be engaged before the unit will operate To open the doors unlock key lift door up slightly and pull top of door forward Door will hinge 180 degrees and hang straight down To remove door swing door
33. awn specifically on the monitored primary lead to the cylinder or the actual current not being sensed False detection of a full cylinder water level within inches of cylinder top due to foaming wiring connection problem circuit board failure Corrective Action Check water level in cylinder If full within 4 of top disconnect white sensor plug on cylinder reset unit and check monitored primary lead to cylinder for current with amp clamp If current present determine why main PCB does not sense the current If no current present determine cause of primary voltage interruption If not full disconnect white sensor plug on cylinder reset unit If error 2 does not reoccur within two minutes cylinder was likely foaming and should be flushed If error 2 does reoccur within two minutes there is a problem with the high water sensor PCB If error 2 occurs with the high water sensor PCB disconnected there is a problem with the main PCB Response See Figure 2 System Messages 4 Max Filling Time Error 3 gt Ge qm Symptom s Diagnosed Time dependent Neither Maximal Level full cylinder is detected nor is there enough current drawn to meet capacity demand Current monitored on primary lead to cylinder is greater than zero and not decreasing The unit will have tried to self correct prior to system shutdown by pulse activating the drain valve to possibly clear any debris holding the drain valve op
34. comes on as the cylinder ages from MAXIMAL LEVEL to CYLINDER SPENT This gives the user ample warning remote red on to replace the cylinder before the NHMC shuts itself down At CYL LIFESPAN END remote yellow green red are ON OFF ON In other words the remote green goes off and the remote yellow comes on in addition to the red if CYLINDER SPENT remains unchanged for approximately three 3 days The NHMC is always internally wired to provide 24VAC to the terminal strip for optional external remote indication Up to 100 mA is available at each of three terminal pairs 61 20 62 40 and 63 36 for activating yellow green and red optional external remote indicators respectively Any or all of these remote indicators can be utilized They can be field supplied resistive 24 VAC loads such as lamps or ordered as options from NORTEC NHB NHP 1 There will be reduced output in spite of a 100 capacity setting and or an unsatisfied call from the on off humidistat for more humidity The NHP has an output display where you will observe that the capacity of the unit is decreasing Each NHB NHP humidifier has a yellow status lamp a green status lamp and a relay for remote indication Double units models NH 150 200 have two of each The yellow and green status lamps are long life LED s light emitting diodes not incandescent lamps The yellow and green status lamps are to be viewed as a pair This way they conv
35. ctronics will differentiate cylinder spent from new cylinder start up and the displayed error will discontinue without a shutdown on Error 9 Response See Figure 2 NHMC NHP System Messages No Current Error 5 oymptom s Diagnosed Time dependent No current sensed by the electronics on the monitored primary lead to the cylinder The unit will have tried to self correct prior to system shutdown by pulse activating the drain valve to possibly clear any debris holding the drain valve open Probable Cause s current being drawn the monitored primary lead to the cylinder or the actual current is not being sensed Water does not reach the electronics due to a restricted water supply line or due to a constantly open leaking drain valve preventing a water level increase High duct static pressure blowing back into the fill cup via steam line empty cylinder diverting the fill cup water to the overflow Unit Takes Self Corrective Action Yes It pulse activates the drain valve to possibly clear any dirt holding the seal open It re tests If symptoms persist after two attempts it then responds as shown in Figure 2 Corrective Action Check the water level in the cylinder If there is water in the cylinder 1 5 of a full cylinder or more check monitored primary lead to the cylinder for current with an amp clamp a If current is present with zero output indicated on the display the problem is with the
36. d Time dependent Neither Maximal Level full cylinder is detected nor is there enough current drawn to meet capacity demand Current monitored on primary lead to cylinder greater than zero but decreasing Unit Takes Self Corrective Action Yes It pulse activates the drain valve to possibly clear any dirt holding the seal open It re tests If symptoms persist after two attempts it then responds as shown in Figure 2 Probable Cause s Refer to Error 3 Corrective Action Refer to Error 3 Response See Figure 2 NHMC NHP System Messages 8 Electronic Error 7 NHMC only Symptom s Diagnosed The electronics of the main PCB have diagnosed the main PCB as defective Probable Cause s 1 Aspike in the primary power supply to the humidifier either high surge or low brown out causing the electronics to experience a logic glitch 2 A problem with the main PCB Corrective Action 1 Reset humidifier and monitor display If Error 7 reoccurs within one minute of resetting the unit the problem is with the main PCB If Error 7 is not repeated the primary power to the unit is suspect Response See Figure 2 NHMC System Messages 9 Phase Interrupt Error 8 only Symptom s Diagnosed The 24 VAC to the main PCB across terminals 44 and 46 is interrupted Probable Cause s a A wiring problem leading to an interruption of the 24 VAC to terminals 44 and 46 of the main PCB b A
37. dulation continuous control packages offered as accessories by NORTEC Power supply comes from inside NHMC NHP Series humidifiers Figure 11 Generalized Modulation Wiring Varies With Each Modulation Option See NORTEC Supplied External Wiring Diagram External Internal NHMC NHP 2 NORTEC provides the humidity set point circuitry and sensor s for wall or duct mounting or both only applies to NHMC NHP is only capable of single channel continuous control modulating as pre selected when ordering the option NORTEC offers several packages for NHMC NHP Series humidifiers Wire according to NORTEC supplied external wiring that comes with each optional modulation package 3 Optional modulation packages without modulating safety high limit can use on off safety high limit Refer to on off controls section 4 All versions can use on off safety air proving switch Refer to on off controls section OPERATION INTRODUCTION The NORTEC NH Series humidifier is a completely new design based on up to date technology The NHB is designed to provide clean steam humidification at an economical price It utilizes NORTEC s patented electronic Auto Adaptive internal control system for high efficiency low waste of water and electricity The NHP and NHMC utilize NORTEC s patented P I Auto Adaptive control for greater control of the space humidity Both the NHP and NHMC use a micro computer cont
38. eS NH Electrode Nortec Steam Humidifiers Installation Operation and Maintenance Guide IMPORTANT Read and save these instructions This guide to be left with equipment owner Form 303 172 1506262 Table Of Contents INSTALLATION 1 RECEIVING 8 UNPACKING EQUIPMENT 1 PRE INSTALLATION CHECKPOINT 1 BASIC HUMIDIFIER CONFIGURATION 1 LOCATION amp MOUNTING ha OE olg 4 gt do e 3e ee a 2 HUMIDIFIERS 44064486 drum cm o be ed kee ce X A a 2 BLOWER PACKS QT Pw a 2 STEAM DISTRIBUTORS 3 PLUMBING sas sss ssa sa Ged GSS SU NO Q Q w Q Q w Q Q Q Q Q eRe 3 WATER SUPPLY LINE X ox x e E OX m Ue 6 2E Ue a 9 DRAIN TING aces eee eee nea eee e CN Ne POR ee ee 407 a 3 STEAM LINE AND CONDENSATE RETURN LINE 4 ACCESSORIES FILL CUP EXTENSION 5 4 ELECTRICAS Zaa eet 5444 2 Z P S pu enr w s 2 2 234 335 4 PRIMARY VOLTAGE SUPPLY WIRING TO HUMIDIFIER 4 LOW VOLTAGE CONTROL WIRING a 5 5 CONTROL INSTALLATION a wow 5 OPTIONAL MODULATION CONTINUOUS CONTROLS 5 OPTIONAL MODULATION CONTINUOUS CONTROL PACKAGES BY NORTEC 7 OPERAT
39. ej _ i i i i j zs __ i ii i ji i i i i i Coz ELI j j j j j j j j j j j j j F SS Ss AAA ESA sese YO _ ii i i i ZZ _ tt tte j j ___ __ po fo fo fo fo i i i fo i i i i fo zoess 92 pt tt Lo C jJ p po fo fo fo fo i i i i fefepofo fo i i i i i i s i i Y eesee non z LON HIONSTAdIOads __ jiji i i i i i fo fefepofo fo fofefofofofofef _ SOW WSLS EL ete fzfzfolofepe 2 2 fo o z 2 fo i sees 1 ete 2 2 2 fo 2 2 ii fo o MA NTO ete 2 2 fo 2 2 i i i r zorse
40. ellow light will come back on in addition to the green light The disposable cylinder must be replaced Although both lights on is the same signal at start up as it is at end of cylinder life the age of the cylinder enables the user to know when both lights is indicating end of cylinder life It is wise to keep a new replacement cylinder on hand to avoid downtime when it becomes time to change the disposable cylinder See Troubleshooting section MANUAL ADJUSTMENT The NHB humidifier is rated in Ibs hr of steam output capacity Set to 100 it will operate at full output until the humidistat has sensed that the humidity has reached setpoint Then it will stop the humidifier by breaking control circuit 8 10 If the humidifier is oversized the humidistat will be quickly satisfied and stop the humidifier As humidity level drops the humidistat calls again It is quickly satisfied and stops again The resultant short cycling is easily overcome A manual capacity adjustment potentiometer pot is provided on the NHB main pc board for that purpose It is marked and is adjustable from 20 to 100 of rating The NHP humidifier utilizing modulation control does not have the same problems of oversizing It reacts to the modulation signal and varies its capacity automatically However if you wish to turn down the capacity the NHP has the same manual capacity adjustment potentiometer po
41. en Probable Cause s Steam line restriction causing back pressure Improper fill rate Leaking drain valve Full cylinder not detected Unit Takes Self Corrective Action Yes It pulse activates the drain valve to possibly clear any dirt It retests If the symptoms persist after two attempts it then responds as shown in Figure 2 Corrective Action Check for water leaking from drain If present correct the drain valve deficiency check for debris holding drain coil plunges open Ensure the steam line from the cylinder outlet to the steam distributor duct or blower pack is properly installed to ensure back pressure is not the case Check water level in cylinder If full reset unit and ensure there is a demand for steam the green LED on unit door will stay iluminated Maximal Level should be indicated on the LCD display and both green and yellow LED is on the unit door illuminate almost immediately If Maximal Level is not indicated a problem exists with the high water sensor circuitry a Check wiring of the high water sensor PCB refer to unit wiring diagram b Check for amperage on all wires at the cylinder with an amp probe amp clamp If amperage is not detected on all wires correct primary wiring deficiency If amperage is detected on all wires proceed to next step Place a jumper across 42 and 48 of main PCB for five seconds If Maximal Level is not pu 5 displayed and the fill valve do
42. ent p D TERMS USED RATED 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 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 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 a false full cylinder indication if the level of the foam approaches the top of the cylinder BACK PRESSURE Restriction of steam flow caused by long steam runs improperly sloped steam lines elbows changing the direction of the 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 distributo
43. ere This feature will reduce the possibility of corrosion of the electrodes and the possible accumulation of algae and bacteria growing in the cylinder BUILT ON AND REMOTE MOUNTED BLOWER PACKS 5 RMBP s FAN MOTOR OILING The blower pack fan motor requires occasional oiling of motor bearings To do this open up the blower pack top and oil the motor with ten drops of SAE 20 grade motor oil Refer to Figure 6 for oiling slots It is important to oil the fan motor every four months to preserve long life and to maintain the fan s warranty It is not necessary to disassemble the fan motor assembly The exploded view Is for visual purposes only TROUBLESHOOTING PLEASE READ THIS SECTION BEFORE REFERENCING SPECIFIC DIAGNOSTIC MESSAGES 1 Ensure the installation detail conforms with the recommendations contained in the Installation Manual Form XX 161 2 Understanding the Principle of Operation is an asset when troubleshooting This information is readily available from your local representative 3 When contacting your local representative or NORTEC for troubleshooting assistance please ensure the serial number has been obtained for reference purposes 4 Whenever the troubleshooting steps indicate a problem with the main pc board first check all connections at the main pcb including the ribbon cable connections at the center of the main pcb before ordering replacements STARTING POINT If nothing is w
44. es not energize green LED must be illuminated the main PCB is defective If Maximal level is displayed a problem exists with the cylinder or the high water sensor PCB of 85 VAC or greater across the orange wires of the high water PCB one orange wire terminates at the white sensor plug attached to the soldered pin of the cylinder the other terminates at one of the contactor connections will signal a full cylinder Maximal Level to the main pcb If this voltage does exist the problem is with the high water PCB if not the problem is within the cylinder can be caused by cylinder being past end of life If not full drain cylinder reset unit and check the fill rate refer to Figure 2 If the fill rate is correct back pressure is the likely cause and should be rechecked Response See Figure 2 NHMC NHP System Messages 5 Cylinder Spent Error 4 oymptom s Diagnosed Water level stays high cycling on and off Maximal Level full cylinder without an increase in output amp draw or reaching demand Probable Cause s Cylinder has reached end of life due to insulative mineral coating on electrodes New cylinder start up with low incoming water conductivity Corrective Action If the cylinder is not new replace the cylinder immediately Within approximately three days the unit will shut itself down on Error 9 resulting in no output instead of reduced output If the cylinder is new the ele
45. ey four Figure 13 System Messages and Responses EPROM 2 NHMC UNIT STATUS LAMPS REMOTE INDICATION 24 VAC TO SYSTEM MESSAGE UNIT 61 20 62 40 63 36 DISPLAYED ON LCD CONTACTOR YELLOW GREEN YELLOW GREEN RED Maximal Level ON ON ON OFF ON OFF Excess Current Error 1 ON ON OFF No Current Error 2 ON ON OFF Max Filling Time Error 3 ON ON OFF Cylinder Spent Error 4 ON ON ON ON No Current Error 5 ON OFF OFF Output Too Low Error 6 ON OFF OFF Electronic Error 7 ON OFF OFF Phase Interrupt Error 8 ON ON OFF OFF Cyl Lifespan End Error 9 OFF ON OFF ON OFF ON When No Current Error 2 is displayed display will change to show Maximal Level and will alternate back and forth NHP UNIT STATUS LAMPS REMOTE INDICATION 24 VAC TO SYSTEM FAULTS UNIT CONTACTOR YELLOW GREEN YELLOW 61 20 Maximal Level See Chart above for details Excess Current ON OFF No Current ON OFF Max Filling Time ON OFF Cylinder Spent ON FLASHING ON No Current OFF ON OFF Output Too Low OFF ON OFF Electronic N A N A N A Phase Interrupt N A N A N A Cyl Lifespan End OFF FLASHING OFF NOTE NHP does not display actual message or error Remote indication 61 20 yellow means humidifier has shutdown and one of several system messages is showing T
46. ftened supply water is often too conductive Measure conductivity and report findings to factory if suspected Mineral bridge between electrodes Unit Takes Self Corrective Action It has already tried to control current with fill off and emergency drain on triggers It then responds as shown below Response UNIT STATUS LAMPS REMOTE INDICATION 24 Vac to UNIT YELLOW 61 20 CONTACTOR YELLOW OFF ON ON 2 Filling Time Probable Cause s As pure steam is produced from tap water most minerals are drained by the Symptom s Diagnosed The fill valve has been auto adaptive control system However it is for a longer time than is normally required for inevitable that minerals will buildup on the non zero current to flow between the electrodes or electrodes and strainer inside the steam cylinder for water level in the cylinder to reach the high It is unavoidable and the cylinder is intended to be water sensor pin disposable Probable Cause s Blocked drain due to blocked Unit Takes Self Corrective Action The humidifier cylinder strainer or blocked drain valve preventing continues to operate with gradually decreasing water from entering the cylinder Drain valve capacity giving the user notice by responding as leaking due to dirt in seal or powered by defective shown below main PC board or powered by wiring error High water sensor circuit not responding due to sensor Response plug no
47. he exception is on the NHP when No Current or Output Too Low is the fault 61 20 yellow will be off but the yellow light on the NHP will be on Remote indication 62 40 green means contactor is on humidifier is operating Remote indication 63 36 red means cylinder is spent replacement is necessary 12 messages instead of two as summarized Figure 14 Figure 14 YELLOW OFF Off OFF Normal operation Replace cylinder or normal on roo Operation fault 5 When both the yellow and the green status lamps are on the water level is detected as being at the top of the cylinder This is normal on start up but as the contained water concentrates the water will stabilize at a lower water level and the yellow lamp will be off 6 When the cylinder is fully used the water level will have returned to the top of the cylinder Since there is no longer any clean electrode surface available at end of cylinder life the required steam output rate can no longer be maintained 7 Atthis stage the yellow lamp flashes and the green lamp is on telling the user that the cylinder is reaching the end of its life and will need to be replaced shortly The humidifier continues to operate 8 The NHB relay for remote indication is not intended to indicate end of cylinder life It is intended to indicate other detected faults explained later in this manual 9 The NHP at end of cy
48. he humidifier will automatically shut down The unit s yellow status lamp is activated anytime there is a system message sent to the LCD where two lines of alphanumeric information await the user System messages are explained in greater detail later in this manual Three 3 different messages will appear in sequence as the cylinder goes from new to spent to needing replacement The is pre programmed to inform the user of the cylinder s status It is important to understand the significance of the unit s system messages status lamps and 24VAC circuits for remote indication Figure 2 summarizes these messages and responses 11 The three 3 messages that will appear in sequence are MAXIMAL LEVEL then CYLINDER SPENT and finally CYL LIFESPAN END The yellow unit status lamp will be on during all three The green unit status lamp primary contactor and steam output will stop at CYL LIFESPAN END This distinguishes it from MAXIMAL LEVEL and CYLINDER SPENT Each of these three 3 messages has a unique combination of responses at the terminal strip for remote indication These unique combinations distinguish them from each other and from any other system message At MAXIMAL LEVEL remote yellow green red are OFF ON OFF Note that MAXIMAL LEVEL will also appear at unit start up At CYLINDER SPENT remote yellow green red are OFF ON ON In other words the red
49. ication The internal primary fuses if present are followed by the primary contactor s When the 24 Vac coil is powered the contactor makes One primary leg is routed through the core of the linear Hall Effect current sensing circuit on the electronics then it goes to the cylinder The high water sensor board has primary voltage side One leg connects to the primary leg one leg connects to the short sensor in the top of the cylinder potential somewhat less than primary is picked up by the sensor at high water level which makes the red black circuit on the low voltage side This creates a resistive loop across terminals 2 4 on the electronics which stops the fill valve until water boils down below the sensor pin Back at the electronics the contactor receives its hot leg from terminal 12 The fill receives its hot leg from terminal 14 The drain receives its hot leg from terminal 16 Unlike the contactor and fill the drain gets its ground leg directly from the transformer It does not depend on the air proving switch to activate The yellow and green status lamps are LED s Polarity is important Terminal 26 is positive dc supply Terminal 22 and 24 are switched dc grounds for yellow and green respectively BLOWER PACKS An optional blower pack BP if present gets its primary voltage from inside the humidifier This way only one external power source has to be connected to the equipm
50. ievjoeleoeloelje joeljoeljoeliejejeloelejeljoelijolieleloij i jol leljoei i lol oe 7 sss Pu o 5 o l o o apa gt e 002 05 001 5 0 050 020 020 020 0 0 500 maow 1 3SVHd 33YHL 3SVHd 319NIS a JALYON STAGOW 9INHN dHN 8HN SLYVd LNIINIIV 1d3e8 LIMIIED WARRANI Y NORTEC INDUSTRIES INCORPORATED and or NORTEC AIR CONDITIONING INDUSTRIES LIMITED 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 with the exception of the cylinder are free from 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 5 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
51. in accordance with NEC and or CEC and existing local electrical codes and by laws LOW VOLTAGE CONTROL WIRING Controls Figure 9 External Wiring of On Off Controls EXTERNAL INTERNAL Controls are available from NORTEC as accessories If controls were not ordered with humidifier they must be purchased supplied by others The following information is relevant to all controls factory supplied or otherwise A B and C described below are to be wired in series only one path for current across terminals 8 and 10 on the low voltage control terminal strip or replaced with a jumper wire for constant operation Caution this is the hot wire from the 24V control transformer it will blow the 3A fuse if any control field wiring touches ground metal A Wall or Duct Mounted Control On Off Humidistat Wired to make on drop in humidity break on rise to setpoint Set to desired RH Canbea make break set of contacts from a Building Automation System B Duct Mounted Safety High Limit On Off Humidistat if used Wired to make on drop in humidity break on rise to safety setpoint Set to approximately 85 RH as a safety to help prevent saturation and wetting in the duct C Duct Mounted Safety Air Proving On Off Switch if used Wired to make when sensing air flow break when no air flow Used as a safety to prevent saturation when no air flow 1 NORTEC offers various versions of A B and C to suit each applicati
52. in switch is switched on green status lamp does not come on Probable Cause s Green status lamp is damaged Long life LED should never burn out NHB electronic board assembly was damaged in shipment or installation Electronics need to be replaced 8 Yellow and Green Status Lamps Both On Symptom s Diagnosed Water has reached the top of the cylinder and activated the high water sensor circuit Note This is normal on startup and at end of cylinder life Probable Cause s Normal on startup with a new cylinder Can last for several hours until cylinder reaches optimum contained water conductivity or electrodes can no longer provide rated capacity or adjusted capacity Water level automatically rises to seek out fresh electrode surface to meet the demand Unit Takes Self Corrective Action Yes It stops the fill valve to prevent overfilling USING THE WIRING DIAGRAM Fixed to the inside of each unit s door is a wiring diagram showing all of the internal and most of the external wiring details Additional external wiring details can also be found with any electrical accessories purchased from NORTEC The following is a detailed explanation of how the NH humidifier with and without options operates Direct reference is made to the wiring diagram Reviewing the proper function in detail will make it easier to troubleshoot if something goes wrong The wiring diagram details a 24 Vac control circuit and a primary
53. linder are as follows check that main breaker is on and power is at the unit check that main water shut off valve is open on off drain switch must be switched on control circuit 8 10 must be made modulation humidistat if present must be calling control circuit 82 83 must be made control circuit 84 85 must be made cabinet mounted humidistat if present must be calling door interlock switch must be made interlock switch can be pulled out to operate unit The unit will undergo a self test P and MC models only to ensure integrity of all the components Lamp green observe light energize Lamp yellow observe light energize Contact relay 1 24V to 61 20 for rem yellow Drain sound and 24 volt at solenoid Fill 24 volt at fill solenoid Contactor listen to contact pulling in Unit must be calling Contact relay 2 24V to 63 36 for rem red Contact relay 3 24V to 61 20 for rem green Internal test Test completed Green and yellow blink together to show test passed It will then start filling the cylinder and begins normal operation Most water does not contain enough conductivity for full boil on initial start up Units will need to concentrate the water over a time period hours to days During this process both lights are on Remarks z Nortec NH Electric Steam Humidifier www humidity com Periodic Maintenance Checklist amp Quick Reference p 1 of 2 Unit Se
54. linder life will not operate the yellow lamp will flash and the green lamp will be off HOW TO REMOVE THE STEAM CYLINDER 1 It is advisable to keep a spare cylinder in stock throughout the humidification season When ordering a replacement steam cylinder always quote the three or five digit model number on the label applied to the cylinder or quote the unit s serial number model and voltage located on the spec label nameplate 2 Turn off water supply to unit 3 The used cylinder must be drained completely before removal If the water has just been boiling allow it to cool before draining Push the ON OFF DRAIN switch to the MANUAL DRAIN position Leave it in this position just long enough to drain the cylinder usually less than 10 minutes 4 When completely drained push the main ON OFF DRAIN switch back to the OFF position Once drained open the main electrical disconnect during the entire cylinder change operation Open plumbing door Cylinder plugs are attached to the primary voltage cylinder wires The plugs remain attached to the wires unless they have to be replaced due to damage The plugs are press fitted over the electrode pins protruding from the top of the cylinder Remove cylinder plugs from cylinder by pulling vertically Using slot screwdriver loosen the steam hose clamp s and pull steam hose off the cylinder vertically Using a small slotted screwdriver depress tab on the re u
55. lly mounted on humidifier built on blower pack BOBP see Figure 4 or detached and field piped and wired to humidifier remote mounted blower pack RMBP see Figure 5 Figure 4 Built On Blower Pack BOBP Optional Built In Supply Air Built On Blower Pack A Grille Built In Steam Distributor single Circuit Hurnidifier Power And Control Wiring All NH Series blower packs consist of a steel cabinet containing blower motor powered by voltage directly from the humidifier fuse relay speed select switch in NH 050 and larger stainless steel steam distributor supply air grille with adjustable louvers and built in manual reset 1 Figure 5 Remote Mounted Blower Packs RMBP Power and control wiring from humidifier 005 030 050 100 3 2 8 0cm 3 2 8 0cm safety thermostat to turn off the humidifier if the blower pack gets overheated Control thermostat mounted on the steam distributor starts the fan when steam is generated When supply voltage differs from voltage required to run blower motor blower pack will contain a proper transformer All blower packs provide intake air filters For installation details about the blower pack please refer to the blower pack installation manual located in the blower pack box Form XX 239 STEAM DISTRIBUTORS Steam distributors are used in ducts or air handling units and are made of stainless steel
56. loop across terminals 42 48 on the electronics which stops the fill valve until water boils down below the sensor pin Back at the electronics the contactor receives its hot leg from terminal 12 The fill receives its hot leg from terminal 14 The drain receives its hot leg from terminal 16 Unlike the contactor and fill the drain gets its ground leg directly from the transformer It does not depend on the air proving switch to activate The yellow and green unit status lamps are LED s Polarity is important Terminal 4 is positive dc supply Terminals 22 and 24 are switched dc grounds for yellow and green respectively NHB A primary to 24 Vac 75 VA transformer tapped from the primary powers the 24 Vac control circuit One leg of the secondary is connected to ground and terminal 6 on the electronics The hot leg finds its way to the electronics via the following in series the external on off controls if present terminals 8 10 the blower pack mounted on off humidistat if present terminals 84 85 and finally the cabinet mounted on off humidistat if present 24 Vac arrives at the electronics terminals 10 hot and 6 ground An onboard 3 15 amp glass fuse protects the circuit A second hot leg takes a more direct route to terminals 8 and 18 on the electronics via the on switch and the door interlock switch in series The primary voltage circuit is what turns the water in the cylinder to steam for humidif
57. lowable positive static pressure an accessory Fill Cup Extension Kit is available from NORTEC See Figure 8 Figure 8 Fill Cup Extension Kit to Overcome Static Pressure 9 Fill Cup RERUM Fill Cup b Overflow Hose Fill Hose Cylinder T Hose From Fill Valve Water column requirements are even higher duct static pressure when distributor s steam outlets are faced with downflow duct applications ELECTRICAL PRIMARY VOLTAGE SUPPLY WIRING TO HUMIDIFIER 1 Check and ensure that available voltage and phase corresponds with operating voltage and phase of humidifier as indicated on the humidifier nameplate label see Figure 1 Ensure that an adequate power supply is available to carry full humidifier amperage drawn as specified by rated amps on the humidifier nameplate label refer to local codes A dedicated external disconnect must be installed Do not exceed the maximum circuit protection amps as indicated on the nameplate label Optional internal primary fuses are not intended to substitute for external fuses Internal primary fuses are a factory added option when specified to protect internal primary wires individually Connect ground wire to cabinet ground clamp Do not use neutral wire of four wire supply as ground Single phase humidifiers may be run on three phase power but load may unbalance power grid External wiring sizes must be
58. measured at the humidifier if the water pressure is suspect ALWAYS supply and install a shut off valve in the water supply line dedicated to the humidifier to facilitate servicing Use 72 OD copper to within 4 feet of the humidifier Reduce copper to 3 8 OD and connect to the factory supplied 3 8 olive compression fitting under the humidifier DRAIN LINE 1 Humidifier is equipped with a 7 8 O D unthreaded drain outlet on underside of drain canal on bottom of the humidifier see Figure 6 A field supplied funnel see Figure 7 is recommended It will prevent backup in the drain pan and in the cylinder due to partially blocked or badly installed drain lines This prevents rusting of the drain pan and arcing due to over concentration The drain canal Figure 6 Drain Line Connection Bottom View Model 005 030 050 100 150 200 Left 150 200 Right Ain mm in mm 5 0 127 6 2 158 6 2 158 19 6 498 1 0 25 2 2 55 2 2 55 2 2 55 has been improved to prevent backup despite long or gently sloped drain lines but it can not compensate for flat or uphill runs The drain line should not end in a sink used frequently by personnel or where plumbing codes prohibit it Route to a floor drain or equivalent for safety reasons since drain water from humidifier can be very hot Keep drain lines as short as possible Keep drain lines sloped down not level and not up since low
59. microcomputer continually monitors the operating status and informs the user in four ways The first signal light status second optional external lamps tied to the control strip and third operating parameters displayed on the alphanumeric LCD display have been discussed The fourth way is to interrupt the LCD and display a system message It only does this as a last resort SELF HELP The microcomputer applies corrective actions whenever its self diagnostics identifies a problem that itis able to correct by itself If the corrective action is not successful then it displays a system message If the corrective action requires a service person then the microcomputer s only resort is to stop the unit and display a system message The unit never stops unless it has to After three days of no call from either the on off controls or the modulating controls the drain valve is automatically activated long enough to drain all water from the steam cylinder This NORTEC exclusive feature will prolong the life of the cylinder SYSTEM MESSAGES Alphanumeric system messages will appear on the LCD display any time the microcomputer decides the user must be informed The microcomputer does not stop the unit for all system messages See the Troubleshooting Section in this manual REMOTE INDICATION The NHMC is always internally wired to provide 24 VAC to the terminal strip for optional external remote indication Up to 100 milliamps is avail
60. move the used cylinder and replace by a new one Do not re use cylinder MANDATORY CLEANING OF THE DRAIN VALVE 1 Note that ring terminal for drain valve green ground wire is sandwiched between drain valve body and drain pan 2 Remove two screws securing drain valve body to drain pan Disconnect the two slip on terminals from the two tabs on the 24VAC drain valve coil 3 Remove hose clip and hose connection from drain valve body 4 Drain valve assembly is now free to be taken to a sink for disassembly and cleaning Important Tapered end of spring must be installed toward the solenoid 5 Clean out the end of the hose and then reconnect it to the drain valve body with the clamp 6 Fit mounting screws through drain valve body one through ring terminal on green ground wire WARNING To prevent the possibility of electrical shock the green ground wire must be reinstalled before power is restored Push the two slip on terminals back onto the two tabs on the coil The terminals although not identical are reversible ox 10 seconds E Nortec NH Electric Steam Humidifier www humidity com Periodic Maintenance Checklist Quick Reference p 2 of 2 Unit Serial of humidifiers Tad Unit type Voltage ___ V ph Steam output lbs hr Customer Job Address Maintenance by Date of maintenance _ HOW TO INSTALL THE REPLACEMENT CYLINDER 1 Reverse procedure should be followed to install new cylinder Main disconnect is
61. n 0 Slope down Y per 12 O Trapped 2 more than static duct pressure O Traps O Size Insulated Stainless steel or plastic 0 Length Size ____ Vertical Horizontal 90 deg elbows qh 45 deg Elbows qty Can condensate be TEE anywhere the steam line Yes J no D WATER LINES Y at max from the unit O 3 8 connection at fill water pressure 30 80psig PVC 0 Stainless steel DRAIN LINES Air gap located within 3ft of the unit Slopped to drain Size CYLINDER Cylinder properly installed and sitting upright WIRING No loose wires around the unit or on the PC board yes O no 0 CONTROLS Installed Location Wiring Setting Installed Location Wiring Setting High limit O Air proving Mod controller Other POWER Voltage amperage rating and fuse correspond to Spec Label 1 Disconnect switch located close to humidifier 226 z Nortec NH Electric Steam Humidifier www humidity com Humidifier Mandatory Start up Checklist amp Quick Reference p 1 of 1 Unit Serial t ofhumidifiers Tad Unit type Voltage V ph Steam output lbs hr Customer Job Address Start up by Date of start up 1 PRELIMINARY Pre start up checklist completed yes noO If no return to Pre Start up Checklist before going on with start up procedure 2 START UP PROCEDURE The prerequisites for getting power and water into the steam cy
62. on In general A is essential whereas B and C are highly recommended in ducted applications 2 Field wiring from humidistat to humidifier and between devices should be 18 AWG or heavier and kept as short as possible 3 Low voltage control terminal strips are provided in the electrical compartment Internal sides are factory wired External sides are to be field wired 4 Each humidifier is supplied with a wiring diagram inside CONTROL INSTALLATION 1 Mount any wall humidistat control or high limit over standard electrical box at height similar to typical thermostat Any wall humidistat should be in location representative of overall space being humidified and not in path of blower pack or air supply grille Do not mount on a outside wall where temperature fluctuation can affect control response Mount duct humidistat in location representative of overall air humidity usually return duct Do not mount it directly in front of steam distributor or in turbulent or mixing zone Mount it where air s humidity and temperature are uniform and representative of spaces being humidified Mount duct high limit humidistat downstream of steam distributors far enough that under normal humidity and air flow conditions steam will have been fully absorbed typically at least 10 feet It must be located to sense high humidity only when uniform and representative air is over humidified or approaching saturation Mount duct air p
63. orking check for 24 VAC output from the stepdown transformer see wiring diagram If there is 24 VAC output the transformer might have been damaged if external controls were installed and or connected with the field supplied fused disconnect on If this is the case the transformer must be replaced The conductivity of the water within the cylinder must be controlled in order for the humidifier to function properly The fill and drain rates must be maintained Filling too quickly can cause over amping and automatic shutdown or blown fuses Filling too slowly can cause insufficient steam output and humidity levels Water supply pressure should be between 30 and 80 psig ideally 55 to 60 psig Draining too slowly can cause over concentration and 15 malfunction due to foaming These just some examples of what can go wrong if the fill and drain rates are not maintained Fill rates of suspect units should be checked Open the disconnect to cut off all power in the humidifier before reaching inside One of the 24VAC wires to each primary voltage contactor holding coil some models have two contactors per cylinder should be temporarily disconnected for this test This way no boiling occurs during the test so as not to detract from the fill rate Fill rates should measure nominally at 1 to 1 1 2 of vertical rise in water level in the cylinder in one minute If filling too quickly check for excessively high supply water
64. ould be limited to authorized personnel only WHEN TO REPLACE THE STEAM CYLINDER The steam cylinder is disposable and must be replaced at end of cylinder life Cylinder life is dependent water supply conditions 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 There are many indications each of which signifies the end of cylinder life NHMC 1 After a period of operation not on initial start up the water level will approach the top of the cylinder Life varies from 500 to 2000 operating hours as illustrated in Figure 12 Figure 12 Water Conditions vs Cylinder Life Capacity Adjustment Setting 100 50 25 gt y 70 c 49 E uc o E O CaCO mg L ppm 1000 2000 4000 Cylinder Life Expectancy average operating hours 8000 There will be reduced output in spite of a 100 capacity setting and or an unsatisfied demand from the humidistat for more humidity This is evident by monitoring the unit s output on the LCD liquid crystal display with up to two lines of continually updated alphanumeric information for the user Each NHMC humidifier has an internal micro computer that can detect end of cylinder life If the cylinder is not changed t
65. problem with the main PCB Corrective Action 1 With the unit switched on measure across terminals 44 and 46 of the main PCB for 24 VAC If not present find the cause of interruption If present the problem is with the main PCB Response See Figure 2 NHMC System Messages 10 Cyl Lifespan End Error 9 oymptom s Diagnosed The criteria for diagnosing Cylinder Spent Error 4 has expired and cylinder has not been replaced Humidifier has shut down to avoid unsafe operation Probable Cause s Refer to Error 4 Corrective Action Refer to Error 4 Response See Figure 2 NHMC NHP System Messages Troubleshooting Dual Cylinder Units Double units NHMC 150 and 200 are two circuits in one cabinet sharing one LCD display A ribbon cable between the RS232 ports links the two circuits The left circuit is the master 1 on the display means left side 2 on the display means right side Refer to double unit operation on in the NHMC Installation and Operation Manual When a fault occurs on the right side of a double unit both sets of lamps and remote relays will come on indicating that a fault has occurred The left side master will display its own faults as well The LCD will indicate which fault has occurred and on which side of the unit 1 or 2 The side not faulted will continue to operate as usual The side which has shut down on fault can be treated as a single circuit using the same troubleshoo
66. r creating 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 downflow applications a downflow distributor should be used but in some cases the fill cup extension will also be required RESET UNIT HUMIDIFIER To reset the humidifier the on off drain switch at the front of the humidifier should be switched 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 device on the main pcb This wire is terminated at the red cylinder plug at the cylinder Units with six primary wires to the cylinder will monitor only one of the two wires terminating with red plugs OPTIONAL BLOWER PACK BUILI ON OR REMOTE RESETABLE THERMODISC N C TRANSFORMER IE REQUIRED dm TWO SPEED SWITCH FUSE a 247 THERMODISC N O OPTIONAL BLOWER o E MOUNTED ON OFF HUMIDISTAT 246810 14 12 16 26 22 24 18 20 INTERNAL Or JUMPER DEDICATED PACK IT 2 OPTIONAL REMOTE TERMINAL BAERS 1 YELLOW BLOCKS 5 puni 1 INDICATOR EXTERNAL n VE E mew Qo 6ee C O sp E PRI TERMINAL BLOCK O
67. rial ofhumidifiers Tad Unit type Voltage _V ph Steam output lbs hr Customer Job Address Maintenance by Date of maintenance _ WHEN TO REPLACE THE CYLINDER NHMC light indication and LCD display 1 Cylinder spent error 4 with Yellow and Green lights on 2 Cyl Lifespan error 9 with Yellow on and Green off NHP light indication 1 Yellow flashing and Green on unit still working might be initial start up fill 2 Yellow flashing and Green off unit shut down NHB light indication 1 NHB Yellow on CYLINDER REPLACEMENT PROCEDURE 1 Turn off water supply to unit 2 Activate drain switch to completely empty water content less than 10 min 3 When drained put switch back to the off position 4 Also open the main electrical disconnect switch and open plumbing door using the key o Remove the cylinder plugs by pulling vertically The plugs are press fitted over the electrode pins protruding from the top of the cylinder AE a slot screwdriver loosen the steam hose clamp s and pull steam hose off the cylinder vertically 7 Using a small slotted screwdriver depress tab on the re usable tie wrap if present around the middle of the cylinder This will loosen the tie wrap to come apart for re use later on 8 The cylinder is now ready to be lifted out of the unit CAUTION Cylinder and any un drained water might still be HOT 9 Always clean the drain valve before installing a new cylinder see further below 10 Re
68. rol system for greater flexibility The NHMC has a liquid crystal display LCD to indicate system messages display RH and temperature The NHMC can accept dual modulation signals and is NORTEC s most advanced model LAYOUT AND FUNCTION The NH Series humidifiers consist of a plumbing and an electric compartment every case there is at least one steam distributor SD for installation in air ducts or blower packs built on BOBP remote mounted RMBP for direct space humidification Water enters the steam cylinder through the bottom via the drain valve from the fill cup assembly when the 24 volt fill valve solenoid is energized When water submerges the electrodes the minerals in the water conduct current that heats the water and produces sterile steam for distribution into the air The minerals in the water remain in the cylinder which is periodically drained to maintain optimum performance and oylinder life Primary electric power is applied to the electrodes in the steam cylinder when the on off switch is pushed on and all controls options are calling A primary to 24 volt stepdown transformer provides power to the contactor holding coil s via the main control board The humidifier s operating status is reported to the user by the green and yellow indicator lights on the front of the unit as shown in following table SIGNAL LIGHT STATUS GREEN OFF ON ON YELLOW OFF OFF ON Off Normal operation Repl
69. roving switch so that it is able to sense air flow or lack of it Wire it to make when air flow is sensed and break when air flow fails Check operation of all on off controls before starting humidifier Calibration of controls on off or modulation in the field may be necessary due to shipping and handling Verify humidistat accuracy before commissioning system OPTIONAL MODULATION CONTINUOUS CONTROLS 1 Read on off controls section first since it is necessary to all control systems Virtually any modulation continuous control external hardware by others as long as it has RH setpoint circuitry may be interfaced with pre specified factory configured NHMC NHP Series pc board via the control terminal strip The NHB can be used with on off control only Use shielded cables for modulation circuits Modulation continuous control by others for use with NHMC NHP Series humidifiers involves one of several control wiring diagrams In all cases modulating signal interfaces through control terminal strip to main pc board inside humidifier The modulation signal must increase from minimum toward maximum as sensed RH actual RH drops below desired RH Ve RH setpoint In response humidifier s steam output will increase from minimum toward maximum When humidifier s steam output Ibs hr matches humidification load Ibs hr modulation signal will stabilize Figure 10 Primary Voltage Supply Wiring VOLTAGE
70. sable tie wrap if present around the middle of the cylinder This will loosen the tie wrap to come apart for re use later on Cylinder is now ready to be lifted out of the unit CAUTION Cylinder and any undrained water might still be HOT MANDATORY CLEANING OF THE DRAIN VALVE Always clean the drain valve before installing a new cylinder since the valve port may be as dirty as the used cylinder 1 Remove used cylinder as previously described NORTEC does not recommend the use of any acid solutions to clean the used cylinder Always replace a used cylinder Figure 15 Reassembly of the Drain Valve and Fill Valve Actuator Male Slip on Connection Tabs Plunger Spring 1 DANN Holding Coil Note that ring terminal for drain valve green ground wire is sandwiched between drain valve body and drain pan Remove two screws securing drain valve body to drain pan Disconnect the two slip on terminals from the two tabs on the 24VAC drain valve coil Remove hose clip and hose connection from drain valve body Drain valve assembly is now free to be taken to a sink for disassembly and cleaning 6 Remove snap fit red from coil assembly slide coil off the actuator 7 Loosen actuator with wrench and unscrew from plastic valve body 8 Clean the exposed core and spring and plastic drain valve port 9 Important Tapered end of spring must be installed toward the solenoid
71. t that the NHB has OTHER POTENTIOMETERS Do not adjust any other potentiometers pots on the pc board s They are factory set and not meant to be user set DETECTING WATER SUPPLY DEFICIENCY Knowing how long it normally takes to fill each size steam cylinder each humidifier s pc board is factory configured to an acceptable maximum filling time using jumpers If it is filling too slowly when the time expires the electronics stops the humidifier To indicate this the green light goes out and the yellow light goes on REMOTE INDICATION Every NHB NHP comes factory wired to provide 24 VAC 100 mA max at 61 20 on the control terminal strip The user can connect an indicator externally to 61 20 It will automatically be activated any time the yellow light is on It will therefore be activated whenever the humidifier shuts off due to excess current or water deficiency It is also normal for it to be activated on start up DOUBLE UNIT OPERATION Turn both switches on If there is a demand for humidity the green status lamp will indicate that the circuit is operating 10 the NHP the optional output indication meter will steadily increase until the meter reads maximum output Maximum output depends on the manual capacity setting of the unit and or the continuous control demand has built in diagnostic capabilities and will shutdown for the following reasons No current similar to NH
72. t connected or defective high water sensor PC board or wiring error or defective main PC UNIT STATUS LAMPS REMOTE board Water supply rate too low or zero due to INDICATION too low pressure or line restriction or clogged 24 Vac to built in strainer Too low supply water conductivity de ionized or RO reverse u CONTACTOR YELLOW meow osmosis supply water has almost no conductivity Measure conductivity and report findings to factory ON ON ON if suspected Response 6 No Current But Humidistat Calling UNIT STATUS LAMPS REMOTE Symptom s Diagnosed For a few minutes INDICATION current is detected in the steam cylinder despite a 24 Vac to demand for humidity Current is not expected to be zero when there is a demand for humidity Probable Cause s Drain valve is leaking so OFF ON ON water never reaches the electrodes Water supply is obstructed Contactor is not activated Supply water is pure without conductivity Fill valve is UNIT YELLOW 61 20 CONTACTOR YELLOW NHB Explanation of Symptoms Without Automatic blocked Fill valve is not being activated Supply Shutdown water pressure is too low less than 30 psig Wrong orifice in fill valve High duct static 4 No Current But High Water Sensor On pressure blows back into the fill cup via the steam line and empty cylinder diverting the fill water to oymptom s Diagnosed High water level in the overflow Taking the s
73. team hose off until some steam cylinder is detected yet no current is water gets into the cylinder solves this detected in the steam cylinder Probable Cause s Sensor plug connected to 6 Output Too Low wrong cylinder pin High water sensor PC board oymptom s Diagnosed For a few minutes defective activates with no water Main PC current does not increase the steam cylinder board defective activates high water circuit despite the fill valve being activated Current is without sensor PC board Monitored leg of three expected to increase soon after the fill valve is phase power supply is dead Main PC board activated defective does not sense current when current is present in monitored leg Probable Cause s Drain valve is partially open so fill rate maintains non zero but non increasing 5 Cylinder Spent current Continual overflow because high water sensor circuit did not respond to full cylinder Symptom s Diagnosed The high water sensor Supply water insufficiently conductive Fill valve is circuit is activated Other criteria are used to partially restricted due to dirt pinched supply line distinguish cylinder spent from normal startup and or wrong orifice Steam supply line is obstructed diagnose the steam cylinder as spent as so back pressure causes continual overflow previously described 20 Supply water pressure is too low less than 30 psig 7 Electronics Symptom s Diagnosed When on off dra
74. that cylinder plugs fit snugly on the pins 9 If cylinder plugs become loose it is best to obtain a new replacement plug Consult factory Figure 16 Cylinder Plug Installation Cylinder Plug Installation Instruction For Part 135 4012 R Y or B 0 50 10 GA Wire lt gt lt Cylinder Plug 8 E am Hex Allen 5 64 2 mm 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 cylinder life Do NOT leave the switch in the DRAIN position indefinitely 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 Lock the cabinet door s to prevent unauthorized tampering All doors are factory supplied with keyed locks DO NOT LEAVE KEY IN LOCK ACCESS SHOULD BE LIMITED TO AUTHORIZED PERSONNEL ONLY As long as the NHMC is powered it will automatically drain the cylinder when there has not been a call for humidity for an extended period of time The cylinder will remain empty until there is a call for humidity at which time the fill valve will open and refill the cylinder The unit will go through its normal stabilization process for optimum operation Figure 17 Where To Oil Oil H
75. ting guidelines as previously described NHB The NHB checks the status of the electrical circuits to the fill valve drain valve primary voltage contactor high water sensor and steam cylinder The manual capacity setting if reduced is taken into consideration When problem symptoms are found the NHB will if necessary respond by shutting itself down The NHB communicates its findings to the user by way of the unit s status lamps and a 24 Vac maximum 100 mA maximum signal sent to the terminal strip for optional external remote indication The signal for remote indication comes in response to the following symptoms In each case the NHB shuts itself down The green status lamp goes off but the yellow status lamp and remote fault relay remain on NHB Explanation of Automatic Shutdowns 1 Excess Current oymptom s Diagnosed Current in steam cylinder increases beyond the fill off and emergency drain on triggers Current reaches 150 of FLA i e 134 of fill off rated amps i e 134 of amps on spec label for 1 second Probable Cause s Blocked drain due to blocked cylinder strainer or blocked drain valve or blocked external drain line No power to drain valve at emergency drain on trigger Power remains on fill valve at fill off trigger Wrong steam cylinder too conductive Wrong fill valve orifice too big Wrong supply voltage too high Supply water too conductive Contained water too conductive 100 so
76. to be left open until cylinder is completely installed and reconnected that the re usable wrap and mounting brackets within the unit secure the cylinder properly 3 The cylinder pluq wires are colour coded in accordance with coloured dots beside the electrode pins on top of the cylinder 4 This colour coding must be adhered to when replacing cylinder plugs on pins 5 With cylinders having six primary voltage cylinder plugs it should be noted that there are two of each colour 6 Care must be taken so that cylinder leads of the same color are always directly opposite each other as indicated by the dot formation on the top of the cylinder 7 white cylinder plug on all units is for the high water sensor electrode which always goes on the single pin surrounded by a plastic shoulder 8 Ensure that cylinder plugs fit snugly on the pins 9 If cylinder plugs become loose it is best to obtain a new replacement plug Consult factory EXTENDED SHUTDOWN 1 Before disconnecting power to the humidifier for a period of extended shutdown ALWAYS DRAIN the cylinder first 2 Do NOT leave the switch in the DRAIN position indefinitely as the drain coil could burn out Leave E Sane in the OFF position and open the main external fused disconnect to stop power to the umidifier 3 Close the shut off valve in the water supply line feeding the humidifier Lock the cabinet door s to prevent unauthorized tampering All doors are factor
77. voltage circuit primary to 24 Vac 75 VA transformer tapped from the primary powers the 24 Vac control circuit One leg of the secondary is connected to ground and terminals 6 and 46 on the electronics The hot leg finds its way to the electronics via the following in series the external on off controls if present terminals 8 10 the blower pack mounted on off 21 humidistat if present terminals 84 85 and finally the cabinet mounted on off humidistat if present 24 Vac arrives at the electronics terminals 10 hot and 6 ground second hot leg takes a more direct route to terminals 8 18 34 38 44 on the electronics via the on switch and the door interlock switch in series The primary voltage circuit is what turns the water in the cylinder to steam for humidification The internal primary fuses if present are followed by the primary contactor s When the 24 Vac coil is powered the contactor makes One primary leg is routed through the core of the linear Hall Effect current sensing circuit on the electronics then it goes to the cylinder The high water sensor board has a primary voltage side One leg connects to the primary leg one leg connects to the short sensor pin in the top of the cylinder potential somewhat less than primary is picked up by the sensor at high water level which makes the red black circuit on the low voltage side This creates a resistive
78. y necessitate using an accessory fill cup extension kit 4 Where possible mount humidifier at a height convenient for servicing 5 Wall mounting bracket provided should be securely attached horizontally and open edge upwards using field supplied fasteners Use a minimum of 3 12 x 3 long wood screws or Figure 3 Wall Bracket Mounting Detail Fasten wall bracket Factory supplied to wall using field supplied fasteners better into a vertical structural surface If any spacer material is used between the bracket and the structural material such as drywall increase fastener length accordingly In addition install a minimum of 2 field supplied fasteners in the holes provided in the back of the unit to prevent the unit from being bumped off the wall bracket See Figure 3 6 Make sure humidifier is level 7 DONOT mount humidifier on hot surfaces 8 If humidifiers are mounted on roof a thermostatically ventilated weatherproof cabinet by others should be used Consult factory 9 DONOT mount humidifiers in an area where freezing may occur Use an accessory Low Temperature Protection Kit if necessary 10 DO NOT mount humidifiers on vibrating surface Consult factory BLOWER PACKS 1 Blower packs are an optional accessory used to directly distribute steam to localized areas such as computer rooms or in structures that do not have a built in air distribution system 2 Blower packs are available integra
79. y supplied with keyed locks ONLY LEAVE KEY INLOCK ACCESS SHOULD BE LIMITED TO AUTHORIZED PERSONNEL 4 NHMC 3 day drain As oe the NHMC is powered it will automatically drain the cylinder when there has not been a call for humidity for an extended period of time o The will remain empty until there is a for humidity at which time the fill valve will open and refill the cylinder This feature will reduce the possibility of corrosion of the electrodes and the possible accumulation of algae and bacteria growing in the cylinder Remarks 29 2 2 pz fo fc fo __ ___ HOLIMS 33O NO 6 2 2 j j _ i i i ss _ i i veses al 2 2 2 pH fo i fo fo r Zes anj e PARE jJ J j e e e _ 9

Nortec 132-3091 User's Manual

Contents

Download Pdf Manuals

Related Search

Related Contents