Table of Contents
Troubleshooting
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Summary of Contents for Nortec NHDI
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Page 1: Troubleshooting Guide
Installation, Operation, Maintenance, and Troubleshooting Guide IMPORTANT: Read and save these instructions. This guide to be left with equipment owner. Form #04-197-1 NHSC / NHDI Resistive Element Steam Humidifiers NHSC NHDI 1505921... -
Page 2: Table Of Contents
NHSC/ NHDI OPERATION ........ - Page 3 RESETTING FAULT INDICATION “ERROR” ......21 HEATING ELEMENT REPLACEMENT INSTALLATION INSTRUCTIONS ....21 TROUBLESHOOTING ·...
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Page 4: Installation
Collector Supply Label Tank Drain Valve NOTE: NHDI does not have the scale collector tank. as indicated on the spec label. Refer to local codes. 3. Report any discrepancy immediately. BASIC HUMIDIFIER CONFIGURATION NORTEC NHSC / NHDI humidifiers share a modular sheet metal cabinet. -
Page 5: Location & Mounting
Top 12” Min, Bottom 12” Min, and Left Side 2” Min. 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. -
Page 6: Blower Packs
Humidistat Scale Collector Tank - NHSC Water Supply 3/8” Drain Line 1.75” O.D. NHSC / NHDI using a Remote Mounted Blower Pack (RMBP) Remote Mounted Blower Packs (RMBP) 11.0" (28.0 cm) Condensate 7.7" (19.5 cm) (18.2 cm) cabinet provided by others should be used. -
Page 7: Steam Distributors And Short Absorption Manifold
5. The NHSC / NHDI can overcome 6” of W.C. duct static pressure max. Consult the factory if you exceed 6” of W.C. 6. For installation details, please refer to the installation manual located in the Steam Distributor box, Form #XX-231. - Page 8 Scale Collector Tank NHSC Drain Line 1.75" O.D. Water Supply 3/8” NOTE: NHDI does not have the scale management system. Figure #9 NHSC uses Nortec steam hose 1.75” O.D. Or Med. L Copper Insulated NHDI uses Nortec steam hose 1.75” O.D. or stainles steel pipe.
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Page 9: Plumbing
4. Same installation as #3, but add Drain Water Cooler instead of fill. WATER SUPPLY LINE - NHDI 1. Humidifier is intended to operate on Reverse Osmosis (RO) water or De-ionized (DI) water with a water conductivity of less than 20 Microsiemens. -
Page 10: Steam Line And Condensate Return Line
Clamp and 1.5” ID Hose Factory Supplied Install a Copper Funnel for the NHSC model and a Stainless Steel Funnel for the NHDI model (by others). Install a 2” O.D Copper Pipe for the NHSC model and 2” O.D. Stainless Steel Pipe for the NHDI model (by others). -
Page 11: Primary (Line) Voltage Wiring To Unit
VOLTAGE PRIMARY (LINE) VOLTAGE WIRING TO UNIT (ACTUAL) NOTE: VoltageAt Terminal Block Must Be InAccordance With Spec. Label. All Wiring To Be InAccordance With Existing NationalAnd Local Electrical Codes. Figure #14 Primary Voltage Supply Wiring (BY OTHERS) Ground - Single Phase Unit. - Single Phase Supply. -
Page 12: Low Voltage Control Wiring
Used as a safety to prevent saturation when there is no airflow. 1. NORTEC offers various versions of A, B and C to suit each application. In general, A is essential, whereas B and C are highly recommended in ducted applications. -
Page 13: Optional Modulation (Continuous Controls)
Generalized Modulation Wiring NHSC/ NHDI SERIES CONTROLCIRCUITTERMINALBLOCK IMPORTANT : READTHESE INSTRUCTIONS CAREFULLYBEFORE CONNECTINGCONTROLWIRING NOTE: See Included Diagram(s) For Accessory Wiring Instructions NHDI: Dry Points, rated 24 Vac/dc 1.0 Amps Other On/Off max. resistive load per Indicator Devices Optional High Limit... -
Page 14: Optional Modulation (Continuous Control) Packages By Nortec
NORTEC offers several packages for NHSC / NHDI Series humidifiers. Wire according to NORTEC supplied external wiring that comes with each optional modulation package. -
Page 15: Steam Generation Regulation
Note: If a fault is detected during the float test, an appropriate fault message is triggered If the float test is successful, the NHSC / NHDI will be in normal operating mode. The display below appears and the green LED lights. - Page 16 • 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...
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Page 17: Interrogation Of The Operating Status
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> or <é>. - Page 18 Left: Switch setting on rotary switch “S1” Right: Set flushing interval Note: The flushing interval is set on switch “S1” on the control board. Figure #18 NHSC / NHDI Drain Cycle Parameters Value Settings Position Drain Interval At 100% Steam Capacity 0 Min.
- Page 19 Set inlet valve correction (cycle ratio) in % of standard setting value to balance out water pressure variations. Figure #19 NHSC / NHDI Control Interval Soft Start Soft Start Soft Start activated (on), consult factory. Deactivated (off) factory set.
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Page 20: Maintenance
NOTES ON MAINTENANCE Figure #21 Major Maintenance - NHSC / NHDI NHSC Maintenance Complete cleaning (between 600 - 6000 hours of operation) - Unit indicates cleaning is required. -
Page 21: Dismantling And Reassembly Work
DISMANTLING AND REASSEMBLY WORK Removal of 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. -
Page 22: Fault Elimination
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 the blow-off pushbutton until the system test has finished (approx. 10 seconds). FAULT ELIMINATION... -
Page 23: Scale Tank Servicing
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Page 24: Replacing Unit Fuses
RESETTING FAULT INDICATION “ERROR” In order to return the steam humidifier to operation after fault indication error, you must press and hold down the drain switch while turning the unit in the off position for approximately 10 seconds. Then turn the unit switch back on and release the drain switch after a 10 second interval. - Page 25 Figure #23 Element Pins Heating Element 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.
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Page 26: Troubleshooting
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. - Page 27 Malfunction / Indication Invalid level Error code: 6A/6B Alarm 6A level indicat Error 6B level indicat Steam pressure (error only) Error code: 7A/7B Alarm 7A communication External safety chain interrupted Error code: none safety chain external A mains failure LEGEND A = Circuit 1 B= Circuit 2 (double unit 2nd cylinder)
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Page 28: Control Circuit Terminal Block
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Page 29: Pre-Start-Up Checklist
- Other: POWER - Voltage, amperage rating and fuse corresponds to Spec Label - Disconnect switch located close to humidifier Field contact:___________________________ Signature:_______________________________ NHSC / NHDI Electric Steam Humidifier # of humidifiers: _____ Voltage: _____V/___ph Date of inspection: ___/___/___ -City water -Softened water - Hardness: _____gr. -
Page 30: Start-Up Checklist
NHSC / NHDI Electric Steam Humidifier Humidifier Mandatory Start-up Checklist (p. 2 of 2) Unit Serial #: _ _ _ _ _ _ _ _ Unit type: NHSC / NHDI Customer/Job: _______________ Address: _________________________________________________ Start-up by: _____________ ______________________________________________________________________________________ 1. PRELIMINARY: - Pre-start-up checklist completed? yes If no, return to Pre-Start-up Checklist before going on with start-up procedure. -
Page 31: Maintenance Checklist
NHSC / NHDI Electric Steam Humidifier Maintenance Checklist (p.1 of 2) Unit Serial #: _ _ _ _ _ _ _ _ Unit type: NHSC / NHDI Customer/Job: _______________ Address: _________________________________________________ Maintenance by: _____________ Date of maintenance:___/___/___ ______________________________________________________________________________________ Type of maintenance:... - Page 32 NHSC / NHDI Electric Steam Humidifier 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.
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Page 33: Exploded Views
- 30 -... - Page 34 Electrical Exploded View - 31 -...
- Page 35 19 18 33 34 - 32 -...
- Page 36 Flange - Lid Heating Element Top Not Shown 1505918 SS Tank Liner NHSC Only Not Shown 1502639 Drain Disk, Large Tank NHDI Only Not Shown 1704205 Compression Fitting Assembly 3/8" SST NHDI Not Shown 1639010 Compression Fitting Assembly 3/8" Brass NHSC Not Shown 1506288 Fitting Brass 3/4"...
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Page 37: Wiring Diagrams
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Page 39: Limited Warranty
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 corrosion, deterioration, or suitability of substituted materials used as a result of compliance with government regulations. - Page 40 Serial # :_________________________ Cylinder # :_______________________ Cylinder Last Replaced: _________________________ MTH/DAY/YR _________________________ MTH/DAY/YR _________________________ MTH/DAY/YR Listed Humidifier E65185 AxAir Nortec Inc. 826 Proctor Avenue Ogdensburg, NY 13669 A WMH COMPANY AxAir Nortec Inc. 2740 Fenton Road Ottawa, ON K1T 3T7...
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