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Nortec NH Series Controls And Remote Communication Optional, A.Digital Control Operation, Page 46

Models: NH Series

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3.CONTROLS AND REMOTE COMMUNICATION (OPTIONAL)

3.CONTROLS AND REMOTE COMMUNICATION (OPTIONAL)

A.DIGITAL CONTROL OPERATION

(1)Figure 11 shows the components of the NORTEC Controller and how to adjust the setpoint.

(2)In the case of a modulating NORTEC Controller, Figure 12 shows the relation between the difference from setpoint to %rh in the room and the 0-10 V DC demand signal sent out. From this basis the NORTEC Controller uses its PI algorithm to adjust its demand signal in accordance with the history of the environment. This type of control allows for tighter and more precise control.

B.DIGITAL TRANSDUCER OPERATION

(1)The NORTEC digital transducers, shown in Figure 13, are designed to sense humidity in duct or in room respectively, and report it back to a controller or the NHTC directly. Required humidifier output is determined by controller or humidifier.

C.REMOTE CONNECTIONS (OPTIONAL)

CAUTION

NORTEC DOES NOT RECOMMEND USING THE DRY RELAY

CONTACTS WITH ANYTHING MORE THAN 24 VAC, 1 AMP.

(1)The NHTC reports the signal light status, in Table 3, by closing the supplied dry contact relays which can be wired back to a BMS or monitoring station. This method of monitoring is not as informative as the actual display, but alerts you to the general status of the unit.

Figure 11. NORTEC Digital Controller

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Page 46 2008-08-28

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Nortec NH Series Controls And Remote Communication Optional, A.Digital Control Operation, B.Digital Transducer Operation

Contents

Installation Manual 2522381-CNH SeriesTM NHTC / NHPC ELECTRODE STEAM HUMIDIFIERPROPRIETARY NOTICE SPECIFICATION LABEL LOCATIONLIABILITY NOTICE COPYRIGHT NOTICE10-10INSTALLATION PROCEDURES TABLE OF CONTENTS10-30MAINTENANCE PROCEDURES 2008-08-28WARRANTY 10-40TROUBLESHOOTING2008-08-28 10-50TECHNICALFigure LIST OF FIGURES2008-08-28 10-10INSTALLATION PROCEDURE LIST OF TABLES10-40TROUBLESHOOTING 2008-08-282008-08-28 Page 1 10-00 INTRODUCTION10-00 Page 2 10-00Figure 1. NHTC D. ACCESSORIES BOX 1.PRE-INSTALLATION2.PACKAGING A.RECEIVING & UNPACKING EQUIPMENTFigure 2. Humidifier Box 10-00Figure 4. SAM-eDistributor Box Figure 3. Distributor BoxA.GENERAL 3.PREINSTALLATION EQUIPMENT VERIFICATION10-00 Page 6 Figure 6. Typical NHTC Installation Sheet 1 of10-00 Page 7 Figure 7. Typical NHTC Installation Sheet 2 of10-00 Page THIS PAGE INTENTIONALLY LEFT BLANK10-00 Page 9 10-10 INSTALLATION10-10 A.LOCATION 1.HUMIDIFIER INSTALLATIONB.MOUNTING WITH KEYHOLES C.MOUNTING WITH WALL BRACKETE.DRAIN LINE D.WATER SUPPLY LINEDRAIN WATER FROM HUMIDIFIER CAN BE VERY HOT F. STEAM RUNS AND CONDENSATE RETURNSFigure 1. Clearances and Operating Conditions 10-10Figure 2. Mounting with Keyholes Figure 3. Mounting with Mounting BracketPage 13 10-10Figure 4. Drain Water and Supply Connection Table 1. Maximum Recommended Length of Steam Line 10-10Page 15 10-10Page 16 10-10Dispersion Method 10-10Page 18 Figure 7. Primary Voltage Supply Wiring10-10 H.CONTROL WIRING 1Primary Voltage Supply Wiring to HumidifierbDemand Signal Controls Installation G.ELECTRICALPage 10-10Page 21 10-1010-10 I.OPTIONAL OUTDOOR TEMPERATURE RESET FUNCTIONFigure 10. Setpoint Versus Outdoor Temperature Page 22L.NORTEC ONLINE INSTALLATION J.HUMIDITY TRANSDUCER SIGNAL INSTALLATIONK.NETWORKING NHTC 10-10Page 24 10-10Page 25 10-10Figure 12. Networking NHTCs Optional Page 26 10-10Page 27 10-20 OPERATION10-20 A.NHTC COMPONENTS 1.NHTCB.HUMIDIFIER START-UP C.BASIC STEAM PRODUCTION METHODNHTC/NHPC Components TablePage 29 10-20Page 30 Table 1. NHTC/NHPC Components cont10-20 Item NumberFigure 3. Humidifier Start-Up Figure 5. Capacity Setting and Cylinder LifeFigure 4. Drain Rate Versus Water Page 3110-20 Figure 6. Basic Steam Production MethodPage 32 E.SOFTWARE INITIAL SELF-TEST F.SOFTWARE FLOW CHART WITH DEFINITIONSTable 2. Self-TestMessages G.SELF-HELP10-20 Figure 7. Software Flow Chart Sheet 1 ofPage 34 10-20 Figure 7. Software Flow Chart Sheet 2 ofPage 35 10-20 Figure 7. Software Flow Chart Sheet 3 ofPage 36 10-20 Figure 7. Software Flow Chart Sheet 4 ofPage 37 10-20 Figure 7. Software Flow Chart Sheet 5 ofPage 38 10-20 Figure 7. Software Flow Chart Sheet 6 ofPage 39 10-20 Figure 7. Software Flow Chart Sheet 7 ofPage 40 H.SYSTEM MESSAGES AND LIGHTS Table 3. Signal Light StatusI.DOUBLE UNIT OPERATION Page 41Page Table 4. Status Messages with LED State10-20 NHTC Display MessageSymptom Diagnosed Page 4310-20 Probable CauseA.STEAM DISTRIBUTOR OPERATION 2.STEAM DISTRIBUTIONB.SAM-eOPERATION C.BLOWER PACK OPERATIONFigure 9. SAM-eOperation Figure 10. Blower Pack Operation and AdjustmentsPage 45 10-203.CONTROLS AND REMOTE COMMUNICATION OPTIONAL NORTEC DOES NOT RECOMMEND USING THE DRY RELAYA.DIGITAL CONTROL OPERATION B.DIGITAL TRANSDUCER OPERATIOND.NORTEC LINKS 2 OPERATION Relation to Demand SignalE.NORTEC ONLINE OPERATION Figure 12. Difference from Setpoint inTHIS PAGE INTENTIONALLY LEFT BLANK Page 4810-20 Page 49 10-30 MAINTENANCE PROCEDURES10-30 A. MAINTENANCE MAINTENANCE PROCEDURESDISCONNECT MAIN POWER BEFORE ANY SERVICING VOLTAGE COMPONENTS AND WIRING. ACCESS SHOULD BEFigure 1. Cylinder Components D.COMPONENTS OF THE STEAM CYLINDERPage 10-30Figure 2. Cylinder Removal Procedure E.HOW TO REMOVE THE STEAM CYLINDERPage 52 10-30Figure 3. Drain Valve Maintenance F.MANDATORY CLEANING OF THE DRAIN VALVEPage 53 10-30Figure 4. Cylinder Replacement Procedure G.HOW TO INSTALL THE REPLACEMENT CYLINDERPage 54 10-30Page 55 10-40 TROUBLESHOOTING10-40 A.PREPARATION 1.TROUBLESHOOTING NH ELECTRODE STEAM HUMIDIFIERSB.STARTING POINT SHOULD BE DONE BY QUALIFIED PERSONNEL C.NHTC/NHPCPage 57 Table 1. Troubleshooting Symptoms10-40 System3.SAM-eTROUBLESHOOTING 2. TROUBLESHOOTING DISTRIBUTORSTable 2. Ensuring A Demand Signal CAN REMAIN VERY HOT DURING THE TROUBLESHOOTING5.DIGITAL ON/OFF HUMIDISTAT SENSOR CALIBRATION 4.BLOWER PACKS TROUBLESHOOTINGPage 59 A.PROCEDUREPage 60 Table 3. NH System MessagesSymptom Diagnosed 10-4010-40 Page 61Probable Cause Corrective ActionPage 62 Table 3. NH System Messages contSymptom Diagnosed 10-4010-40 Page 63Probable Cause Corrective ActionSymptom Diagnosed Page 6410-40 Table 3. NH System Messages cont10-40 Page 65Probable Cause Corrective ActionTable 4. Term Definitions 6.0-10VDIGITAL HUMIDISTAT SENSOR CALIBRATIONPage 66 A.PROCEDUREPage 67 10-50 TECHNICAL10-50 Table 1. Controller and Sensor Specifications 1.WIRING AND TERMINALSA.HUMIDIFIER CONTROL INFORMATION Page 68Figure 1. NHTC/NHPC Double Unit Wiring Diagram B.NH WIRINGPage 69 10-5010-50 Figure 2. NHTC/NHPC Wiring DiagramPage 70 3 Controls Wired A.PRE-NORTECONLINE START UP CHECKLIST WIRING4 Start-UpProcedure B. PRE-NORTECLINKS START-UPCHECKLISTWIRING C. HUMIDIFIER MANDATORY PRE-STARTUP CHECKLISTPOWER Unit type1.PRELIMINARY 2.START-UPPROCEDURERemarks Page 73CYLINDER REPLACEMENT PROCEDURE WHEN TO REPLACE THE CYLINDERMANDATORY CLEANING OF THE DRAIN VALVE Page 74EXTENDED SHUTDOWN HOW TO INSTALL THE REPLACEMENT CYLINDERPage 75 10-50A.ASD, BSD, CSD DISTRIBUTOR 3.SPARE PARTS AND EXPLODED VIEWSB.SAM-eSPARE PARTS Figure 4. SAM-eExploded View and Spare Parts10-50 C.NH SERIES HUMIDIFIER SPARE PARTSPage 77 Table 2. NHTC/NHPC Plumbing Part List Table 2. NHTC/NHPC Plumbing Part List cont 10-50 Page 7910-50 Page 8010-50 Page 81 Table 3. NHTC/NHPC Electrical Parts List10-50 Table 3. NHTC/NHPC Electrical Parts List contPage 82 THIS PAGE INTENTIONALLY LEFT BLANK Page10-50 WARRANTY U.S.A Cylinder Replacement Date MM/DD/YYYYCANADA Walter Meier Climate USA Inc