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Nortec NHDI - page 1
NHSC / NHDI Resistive 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 ...
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Nortec NHDI - page 2
Table Of Contents INSTALLATION 1 RECEIVING & UNPACKING EQUIPMENT ................................1 PRE-INSTALLATION CHECKPOINT ...................................1 BASIC HUMIDIFIER CONFIGURATION ..................................1 LOCATION & MOUNTING .........................................2 HUMIDIFIERS ·················· ...
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Nortec NHDI - page 3
RESETTING FAULT INDICATION “ERROR” .............................2 1 HEATING ELEMENT REPLACEMENT INSTALLATION INSTRUCTIONS ................2 1 TROUBLESHOOTING ··········································2 3 CONTROL CIRCUIT TERMINAL BLOCK .................................2 5 PRE-START-UP CHECKLIST ......... ...
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Nortec NHDI - page 4
INSTALLATION RECEIVING & UNPACKING EQUIPMENT 1. Check packing slip to ensure ALL material has been delivered. 2. All 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. 3. Inspect shipping boxes for damage and note on shipping wayb ...
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Nortec NHDI - page 5
LOCATION & MOUNTING HUMIDIFIERS NHSC / NHDI Series humidifiers are designed to mount on a suitable wall or vertical surface. Do not sit the unit 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 ...
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Nortec NHDI - page 6
and visible from within the plumbing section of the unit, and that the unit’s flanges are properly contained within the wall bracket. 5. Install tank bracket. See Figure #5. (NHSC Version only). Mounting the scale tank. (NHSC Version only). 6. Make sure humidifier is level. 7. DO NOT mount humidifier on hot surfaces. 8. If humidifiers are mounted ...
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Nortec NHDI - page 7
2. All NHSC / NHDI Series blower packs consist of a steel cabinet containing: blower/motor powered by voltage directly from the humidifier, fuse, relay, speed select switch, stainless steel steam distributor, supply air grille with adjustable louvers, and a built-in manual reset safety thermostat to turn off the humidifier if the blower pack gets o ...
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Nortec NHDI - page 8
-5- Low V oltage Controls Wiring 24 V ac Primary Wiring Copper Funnel Drain (by others) LCD Keypad Display with LED S tatus Scale Collector T ank NHSC Air Gap Drain Line 1.75" O.D. Humidistat S team 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 pip ...
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Nortec NHDI - page 9
PLUMBING All water supply and drain line connections should be installed in accordance with local plumbing codes and should be copper or other material suitable for potable water at 140ºF (60ºC). WATER SUPPLY LINE - NHSC 1. The humidifier is intended to operate on potable water. 2. Standard fill valves are sized for water pressure ranging from 30 ...
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Nortec NHDI - page 10
STEAM LINE AND CONDENSATE RETURN LINE 1. Refer to the installation manual of the steam distribution system used in your application. Steam Distributor Form #XX-231, SAM-e Form #XX-249, and Blower Pack Form #XX-277. ELECTRICAL PRIMARY VOLTAGE SUPPLY WIRING TO HUMIDIFIER 1. Check and ensure that available voltage and phase corresponds with operating ...
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Nortec NHDI - page 11
-8- L1 L2 Ground Ground Wire Ground Leg 2P o l e Te r m i n a l Block Dedicated Circuit Breaker Or Disconnect - Single Phase Unit. - Single Phase Supply . - Required V oltage Between L1 And L2. - Load Balanced. L1 L2 Ground Ground Wire Ground Leg 2P o l e Te r m i n a l Block - Single Phase Unit. - 3 Phase Supply . - Required V oltage Between L1 An ...
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Nortec NHDI - page 12
4, All blower packs require field wiring between two pole primary voltage terminal blocks and two low voltage control (class 1 circuit wiring required) terminal strips; one of each located in the humidifier and the remote blower pack cabinet. To properly access the primary block on the humidifier, it is necessary to open the side pan. To connect th ...
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Nortec NHDI - page 13
temperature are uniform and representative of spaces being humidified. 3. 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 a ...
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Nortec NHDI - page 14
OPTIONAL MODULATION (CONTINUOUS CONTROL) PACKAGES BY NORTEC 1. Modulation (continuous control) “packages” are offered as accessories by NORTEC. Power supply comes from inside NHSC / NHDI humidifiers. 2. NORTEC provides the humidity set point circuitry and sensor(s) for wall or duct mounting or both as pre-selected when ordering the option. NORT ...
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Nortec NHDI - page 15
STEAM GENERATION REGULATION The steam is produced in the steam tank by resistive heating element technology. An external or the internal regulator for connection as required control the steam production fully variably from 3 to 100%. FLUSHING - NHSC ONLY The evaporation process increases the concentration of minerals in the water of the steam cylin ...
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Nortec NHDI - page 16
• Green LED lit : Unit producing steam • Yellow LED flashing : Major or minor servicing due. The relevant notice is shown in the display. • Red LED flashing : There is a problem. The unit is trying to solve the problem. The relevant warning message appears in the display. • Red LED lit : Insoluble problem. The relevant error message appears ...
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Nortec NHDI - page 17
INTERROGATION OF THE OPERATING STATUS The NHSC / NHDI operating and display unit has a “display menu” from which various operating parameters can be viewed. Note: It is not possible to change the values on the display level. Operation Call up the display level with < ê >o r< é >. < ê > next operating parameter. < é > ...
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Nortec NHDI - page 18
-1 5- Note: The stated times are based on 100% steam capacity. If the operation is at a lesser capacity, the time should be extended accordingly. The servicing intervals are set using the rotary switch “S2” on the control board. Drain Cycle The following indications are provided for the set flushing interval: Left: Switch setting on rotary swit ...
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Nortec NHDI - page 19
power limit screen. To change the power limit, simply press the down aroow key to desired capacity and press enter to save that new value. Press menu key to exit parameter screen. Inlet Valve Correction Set inlet valve correction (cycle ratio) in % of standard setting value to balance out water pressure variations. Soft Start Soft Start activated ( ...
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Nortec NHDI - page 20
Unit Type Warning: In order to eliminate faults, the steam humidifier must be switched off and secured against unintentional re-connection. Take care that the electricity supply to the main contactor is disconnected (check with voltage meter). Only allow trained and qualified personnel to repair faults. Faults relating to electrical installation (e ...
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Nortec NHDI - page 21
Minor Maintenance When The yellow LED flashes and the message “minor servicing due” appears, alternating with the normal operation indication. Work Carry out the periodic inspection items. Empty the steam cylinder and clean the scale collector tank. Major Maintenance When The yellow LED flashed and the message “major maintenance due” appear ...
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Nortec NHDI - page 22
Note: The heating elements do not have to be entirely free from scale. Then rinse heating elements thoroughly with fresh water. Warning! Ensure that the electrical connections remain dry. Warning! Do not remove scale coating on the heating elements with tools (screwdriver, scraper, etc.) or by striking. This could damage the heating elements. Clean ...
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Nortec NHDI - page 23
-2 0- 5. Remove locking screws on the front of the Scale T ank support mechanism. Scale tank last replaced on: ON OFF DRAIN 1 2 6 PN: 150-5913 Rev . A 7. Vi sually inspect cylinder , heating elements and o-ring. Clean or replace if necessary . 6. Lower and remove Scale T ank. 4. Disconnect hose connection on scale tank. 3. Open manual drain valve o ...
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Nortec NHDI - page 24
REPLACING UNIT FUSES Warning! Before replacing the unit fuse the steam humidifier must be switched off and secured against unintentional re-connection. Take care that the electricity supply to the main contactor is disconnected (check with voltage tester). Warning! Electronic components are very sensitive to electrostatic discharge. To protect thes ...
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Nortec NHDI - page 25
20. Connect temperature switch cable. Note: 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. -2 2- Element Pins Heating Element Figure #23 ...
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Nortec NHDI - page 26
-2 3- TROUBLE-SHOOTING Most operational malfunctions are not caused by faulty equipment but rather by improper installation or disregard for planning guidelines. Therefore, a complete fault diagnosis always involves a thorough examination of the entire system. Often, the steam hose connection has not been properly executed or the fault lies with th ...
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Nortec NHDI - page 27
-2 4- Malfunction / Indication Cause Remedy Invalid level Error code: 6A/6B Level unit faulty. Magnetic field in vicinity of level unit. Replace level unit. Eliminate magnetic field. Steam pressure (error only) Error code: 7A/7B Steam hose blocked or restricted (water trap). Pressure balance adapter into steam connection fitting blocked. Duct press ...
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Nortec NHDI - page 28
-2 5- NHSC / NHDI SERIES CONTROL CIRCUIT TERMINA L B L OCK IMPORT A NT : REA D THESE INSTRUCTIONS CA REFUL L Y B EFORE CONNECTING CONTROL WIRING NOTE: If no On/Off Control is used, then af ield jumper must be connected across 8 and 10 in order for humidifier to operate NOTE: See In c l u d ed Di ag r am (s ) Fo r A c c es s o r y Wi r i n g In s t ...
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Nortec NHDI - page 29
Humidifier Mandatory Pre-Start-up Checklist (p.1 of 2) Unit Serial #: ________ # of humidifiers: _____ Tag: _____________ Unit type: NHSC / NHDI Voltage: _____V/___ph Steam output: ____lbs./hr Customer/Job: _______________ Address: __________________________________________________ Inspected by: _____________ Date of inspection: ___/___/___ _______ ...
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Nortec NHDI - page 30
-2 7- Humidifier Mandatory Start-up Checklist (p. 2 of 2) Unit Serial #: ________ # of humidifiers: _____ Tag: _____________ Unit type: NHSC / NHDI Voltage: _____V/___ph Steam output: ____lbs./hr Customer/Job: _______________ Address: _________________________________________________ Start-up by: _____________ Date of start-up: ___/___/___ ________ ...
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Nortec NHDI - page 31
-2 8- Maintenance Checklist (p.1 of 2) Unit Serial #: ________ # of humidifiers: _____ Tag: _____________ Unit type: NHSC / NHDI Voltage: _____V/___ph Steam output: ____lbs./hr Customer/Job: _______________ Address: _________________________________________________ Maintenance by: _____________ Date of maintenance: ___/___/___ _____________________ ...
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Nortec NHDI - page 32
-2 9- Maintenance Checklist (p.2 of 2) Note: In all cases, local regulations relating to environmental protection must be implemented. How to reset the maintenance indication: - Switch on the services in the main supply lines. - With the unit switch off, depress and hold the drain switch. - Switch on the steam humidifier with the unit switch - Cont ...
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Nortec NHDI - page 33
-3 0- ...
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Nortec NHDI - page 34
-3 1- Electrical Exploded View ...
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Nortec NHDI - page 35
-3 2- 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 ...
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Nortec NHDI - page 36
-3 3- Plumbing Exploded View Capacity 180/3 Voltage 208v 230V 460V 575V 208v 230V 460V 575V 208v 230V 460V 575V 208v 230V 460V 575V 208v 230V 460V 575V 208v 230V 460V 575V 460V 575V 460V 575V 460V 575V 460V 575V Nortec PN Description 1 1 5 0 2 6 4 4 P u m p , D r a i n 2 4 V 6 0 H z 11111111111111111111111111112222 2 1 5 0 6 2 8 6 F i l l V a l v e ...
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Nortec NHDI - page 37
-3 4- ...
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Nortec NHDI - page 38
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Nortec NHDI - page 39
LIMITED WARRANTY AxAir Nortec Inc. and/or AxAir Nortec Ltd. (hereinafter collectively referred to as THE COMPANY), warrant for a period of two years from date of shipment, that THE COMPANY’s manufactured and assembled products, not otherwise expressly warranted are free from defects in material and workmanship. No warranty is made against corrosi ...
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Nortec NHDI - page 40
Model # :_________________________ Serial # :_________________________ Cylinder # :_______________________ 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 ...
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