Nortec NHDI Installation & Operation Manual Download Page 2

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Table Of Contents

INSTALLATION

RECEIVING & UNPACKING EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

PRE-INSTALLATION CHECKPOINT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

BASIC HUMIDIFIER CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

LOCATION & MOUNTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

HUMIDIFIERS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 2

BLOWER PACKS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 3

STEAM DISTRIBUTORS AND SHORT ABSORPTION MANIFOLD · · · · · · · · · · · · · · · · · 3

PLUMBING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

WATER SUPPLY LINE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 6

DRAIN LINE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 6

STEAM LINE AND CONDENSATE RETURN LINE · · · · · · · · · · · · · · · · · · · · · · · · · · 7

ELECTRICAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

PRIMARY VOLTAGE SUPPLY WIRING TO HUMIDIFIER · · · · · · · · · · · · · · · · · · · · · · 7

PRIMARY VOLTAGE SUPPLY WIRING FROM HUMIDIFIER(S) TO BLOWER PACKS · · · · · · · 7

LOW VOLTAGE CONTROL WIRING · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 9

CONTROL INSTALLATION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 9

OPTIONAL MODULATION (CONTINUOUS CONTROLS)· · · · · · · · · · · · · · · · · · · · · · 10

OPTIONAL MODULATION (CONTINUOUS CONTROL) PACKAGES BY NORTEC · · · · · · · · 11

OPERATION

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

LAYOUT AND FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

LEVEL REGULATION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 11

STEAM GENERATION REGULATION· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 12

FLUSHING · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 12

SCALE COLLECTOR TANK · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 12

NHSC/ NHDI OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

STARTING OPERATION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 12

INTERROGATION OF THE OPERATING STATUS · · · · · · · · · · · · · · · · · · · · · · · · · · · 14

MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

NOTES ON MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

DISMANTLING AND REASSEMBLY WORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

NOTES ON CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

FAULT ELIMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

SCALE TANK SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

REPLACING UNIT FUSES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Summary of Contents for NHDI

Page 1: ...esistive Element Steam Humidifiers Installation Operation Maintenance and Troubleshooting Guide IMPORTANT Read and save these instructions This guide to be left with equipment owner Form 04 197 1 1505921 NHSC NHDI ...

Page 2: ...PLY WIRING FROM HUMIDIFIER S TO BLOWER PACKS 7 LOW VOLTAGE CONTROL WIRING 9 CONTROL INSTALLATION 9 OPTIONAL MODULATION CONTINUOUS CONTROLS 10 OPTIONAL MODULATION CONTINUOUS CONTROL PACKAGES BY NORTEC 11 OPERATION 11 INTRODUCTION 11 LAYOUT AND FUNCTION 11 LEVEL REGULATION 11 STEAM GENERATION REGULATION 12 FLUSHING 12 SCALE COLLECTOR TANK 12 NHSC NHDI OPERATION 12 STARTING OPERATION 12 INTERROGATION...

Page 3: ...ERROR 21 HEATING ELEMENT REPLACEMENT INSTALLATION INSTRUCTIONS 21 TROUBLESHOOTING 23 CONTROL CIRCUIT TERMINAL BLOCK 25 PRE START UP CHECKLIST 26 START UP CHECKLIST 27 MAINTENANCE CHECKLIST 28 EXPLODED VIEWS 30 WIRING DIAGRAMS 34 ...

Page 4: ...artment 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 open for ease of electrical connection For safety the door when closed keeps the side cover from being opened Single units have a plumbing compartment attached to the left side of the electrical Double units have a second plum...

Page 5: ... 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 4 4 Mount unit on hanging bracket after ensuring the bracket is properly anchored to the wall Raise the unit and place it ...

Page 6: ...stem 3 23 0 58 4 cm 11 0 28 0 cm 2 9 7 3 cm 14 2 36 2 cm 7 2 18 2 cm 7 7 19 5 cm Power Steam Condensate Dimensions Shown Are Steam Line Connections Allow Minimum 12 31 cm Clearance On Each Side Wall Mounting Bracket Figure 7 Remote Mounted Blower Packs RMBP Scale Collector Tank Remote Mounted Blower Pack Figure 6 Remote Mounted Blower Pack Remote Mounted Blower Packs RMBP Only NHSC NHDI uses Norte...

Page 7: ... duct 2 The SAM e optional accessory has the same function to distribute steam inside a duct The only difference is that this system is designed to reduce the absorption distance of the steam in the duct by optimizing the steam distributors 3 Each cylinder requires its own steam line and at least one distributor do not join two or more cylinders to one larger steam line Any cylinder s steam line m...

Page 8: ... Supply 3 8 Figure 10 Typical Duct Application using Standard Distributor Low Voltage Controls Wiring 24 Vac Primary Wiring Copper Funnel Drain by others LCD Keypad Display with LED Status Scale Collector Tank NHSC Air Gap Drain Line 1 75 O D Humidistat Steam Line Connection NHSC NHDI uses Nortec steam hose 1 75 O D Or Med L Copper Insulated uses Nortec steam hose 1 75 O D or stainles steel pipe D...

Page 9: ... see Figure 12 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 2 The NHSC scale collector tank is also equipped with its own drain It is recommended to pipe with a flex hose the scale collector tank to allow drainage if required while maintaining ease of servicing DO NOT HARDPI...

Page 10: ...IER S TO BLOWER PACKS 1 All blower packs are wired by others to be powered from the humidifier 2 As a safety feature blower packs come equipped with a manual reset safety thermostat and relay built into the blower pack cabinet The manual reset thermostat turns off the humidifier if the blower pack gets overheated The control thermostat mounted on the steam distributor starts the fan when steam is ...

Page 11: ...Be Unbalanced L3 Neutral NOTE VoltageAtTerminalBlockMustBeInAccordanceWithSpec Label AllWiringToBeInAccordanceWithExistingNationalAndLocalElectricalCodes L1 L2 Ground Ground Wire Ground Leg 3 Pole Terminal Block 3 Phase Unit 3 Phase Supply Required Voltage Between Any Two Legs Load Will Be Balanced L3 Neutral PRIMARY LINE VOLTAGE WIRING TO UNIT VOLTAGE ACTUAL E X T I N T E X T I N T E X T I N T De...

Page 12: ...dity break on rise to set point Set to desired RH Can be a 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 set point 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 t...

Page 13: ...ide of terminals 28 30 and 32 on humidifier s control terminal strip Always refer to the external control s wiring diagram factory supplied with each NORTEC modulation control option 7 Varying dc Voltage Modulation Signal Powered by Others NHSC NHDI humidifiers can be factory configured to accept the following vdc signals 0 10 vdc 0 20 vdc 1 5 vdc or 2 10 vdc Wire according to NORTEC supplied exte...

Page 14: ...ation Water enters the steam cylinder through the bottom via the fill cup assembly when the 24 volt fill valve solenoid is energized The water is heated via electric element and produces sterile steam for distribution into the air Primary electric power is applied to the heating elements in the steam cylinder when the on off switch is pushed on and all control options are calling A primary to 24 v...

Page 15: ... properly or for possible damage Caution Damaged units and units with improper installation must not be operated Open the filter valve shut off valve in the water feed line Switch on the external disconnect for the main supply Heating and control voltage Ensure the valve on the NHSC mineral tank is closed Switch on the steam humidifier main switch The steam humidifier carries out a system test The...

Page 16: ...he display Red LED lit Insoluble problem The relevant error message appears in the display Optional Remote operating and fault indication If the steam humidifier is equipped with the optional remote operating and fault indication option RFS the operating status will be shown as follows K1 Steam N O Normally open K2 Error N O Normally open Or N C Normally closed K3 Service N O Normally open Or N C ...

Page 17: ...ion Note If the internal controller is activated only the actual value is shown Under the following conditions the actual value may differ from the nominal value upon activation of the heating power if capacity limitation is active during the filling cycle of the steam cylinder Analog Input humidity demand Current value of the signal applied to the analog input in of its max value Note If the inte...

Page 18: ... carbon filter that will remove up to 99 of the chlorides Consult the factory for additional information if your water contains high levels of chlorides Nortec recommends performing a semi annual water analysis to ensure optimal performance Stand by Heating Stand by heating activated on deactivated off Note If stand by heating is active the water temperature in the steam cylinder is constantly kep...

Page 19: ...rial Interface Serial Interface activated on consult factory Deactivated off factory set Full Drain Cycle Full Drain Cycle activated on consult factory Deactivated off factory set Flush Cycle Flush Cycle activated on consult factory Deactivated off factory set Control Signal Range of the active analog signal in V or mA respectively Note The range of the analog signal may be adjusted using the rota...

Page 20: ...CE To safeguard reliable operation the maintenance of the NHSC should be devised in three stages A distinction is made here between periodic inspections minor servicing and major maintenance of the steam air humidifier The intervals required between minor servicing and major maintenance depend on the water quality and the quality of steam generated and can be pre selected on the rotary switch S2 o...

Page 21: ...f the scale collector tank NHSC Only Caution Before commencing any dismantling work the humidifier is to be taken out of operation as previously described NOTES ON CLEANING NHSC Only Cleaning the steam cylinder scale collector tank and steam cylinder liner Whenever possible clean off any mineral coating that has formed Wash parts with lukewarm soap suds and then rinse off well Note if the componen...

Page 22: ...ered to In all cases local regulations relating to environmental protection must be implemented To reset the maintenance indication When maintenance work has been completed the maintenance display can be reset as follows Turn on the service switches in the main supply line With the unit switched off depress and hold the drain switch Turn on the humidifier with the unit switch Continue to depress t...

Page 23: ...ting elements and o ring Clean or replace if necessary 6 Lower and remove Scale Tank 4 Disconnect hose connection on scale tank 3 Open manual drain valve on Scale Tank to drain remaining water 2 Turn off the unit 1 Drain Cylinder Scale Collector Tank SCALE COLLECTOR TANK SERVICING Note Scale collector tank has to be removed after 5000 hours or 3 years whichever comes first ...

Page 24: ...n switch after a 10 second interval HEATING ELEMENT REPLACEMENT INSTALLATION INSTRUCTIONS 1 Drain unit 2 Turn off the unit and disconnect primary power to the unit 3 Open the plumbing door 4 Let unit tank cool down if needed 5 Remove steam hose by loosening gear clamp 6 Disconnect temperature switch Note there is no polarity with this cable 7 Remove gear clamp and remove tank from the unit 8 Undo ...

Page 25: ...ote This cable is not polarity sensitive 21 Double check all the connections 22 Turn the unit on 23 Allow unit to fill 24 Inspect unit operation and check for leaks 25 Close and lock plumbing door 22 Element Pins Heating Element Figure 23 ...

Page 26: ... blocked main water tap closed filter valve closed or blocked Water pressure too low Inlet valve does not open filter sieve in Inlet valve blocked or inlet valve faulty Feed hoses into the steam humidifier not connected or kinked Level unit not connected Float in the level unit sticking or level unit faulty Check water feed open main water tap open or clean filter valve Raise water pressure range ...

Page 27: ...if necessary and install correctly Remove adapter and clean opening with a needle Inspect ventilation settings External safety chain interrupted Error code none Ventilator lock open Automatic flow control has responded Safties are open Switch on ventilator ventilation system Inspect ventilator filter of ventilation system Servicing inspect system if necessary Main failure on Unit B Inspect voltage...

Page 28: ... ACCESSORY DIAGRAM No 1508104 Rev A Nov 21 2003 8 32 30 28 61 C o n tro l Hu m id ista t Air Pro vin g Sw itc h Hig h Lim it Hu m id ista t O th e r O n O ff De vic e s Optional Modulation Control See Diagramincluded with unit for details 10 Optional external remote indication Any or all of these remote indications can be utilized Refer to Trouble Shooting Manual for system status indication NHDI ...

Page 29: ...r ____________________ Ensure the scale tank bracket is locked in place r STEAM LINES CONDENSATE LINES Slope up 2 per 12 r Slopped back to drain r Slope down per 12 r Trapped 2 more than static duct pressure r Traps r Size _______ Insulated r Length Size ____________ 90 deg elbows qty ____ 45 deg Elbows qty ____ Can condensate be trapped anywhere in the steam line Yes r no r WATER LINES at max 4ft...

Page 30: ...l undergo a System Test to ensure integrity of all the components If the test is successful the unit will fill and the float test will be carried out If everything ok the green light will come on and the display will show NHDI or NHSC Ready 3 OPERATIONAL CHECK Switch on the humidification by raising the humidity set point on the humidistat controller Switch off the humidification by lowering the h...

Page 31: ...me interval between minor and major are set through rotary switch 2 on the control board Cleaning recommendations for the Steam cylinder mineral collector tank NHSC Only and steam cylinder NHSC Only insert Drain unit completely including mineral collector tank drain Remove lime collector tank remove steam cylinder Whenever possible chip off or scrape off any scale coating Wash and rinse parts with...

Page 32: ...hed approx 10 sec Comments ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ _________________...

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Page 34: ... 31 Electrical Exploded View ...

Page 35: ... 32 39 40 1 2 4 5 6 7 8 15 17 20 10 11 21 22 23 24 9 19 18 25 26 27 28 29 30 32 33 34 35 36 38 37 12 31 2 3 16 13 14 ...

Page 36: ...479 Element Heating 11 25 LBS 240V 1 2 3 1507283 Element Heating 11 25 LBS 480V 1 2 3 6 12 1507284 Element Heating 11 25 LBS 600V 1 2 3 6 12 1507279 Element Heating 15 LBS 208V 1 2 3 1507280 Element Heating 15 LBS 240V 1 2 3 1507281 Element Heating 15 LBS 480V 1 2 3 6 12 1507282 Element Heating 15 LBS 600V 1 2 3 6 12 26 1502646 Float Chamber Assembly 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...

Page 37: ... 34 ...

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Page 39: ...ied 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 limit...

Page 40: ... Cylinder Last Replaced _________________________ MTH DAY YR _________________________ MTH DAY YR _________________________ MTH DAY YR A WMH COMPANY AxAir Nortec Inc 826 Proctor Avenue Ogdensburg NY 13669 PRINTED IN CANADA Listed Humidifier E65185 AxAir Nortec Inc 2740 Fenton Road Ottawa ON K1T 3T7 ...

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