NH Electrode Steam Humidifiers Installation, Operation, and Maintenance Guide IMPORTANT: Read and save these instructions. This guide to be left with equipment owner.
Table Of Contents INSTALLATION 1 RECEIVING & UNPACKING EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 PRE-INSTALLATION CHECKPOINT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 BASIC HUMIDIFIER CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 LOCATION & MOUNTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 HUMIDIFIERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE 10 WHEN TO REPLACE THE STEAM CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 MOUNTED BLOWER PACKS (BOBP’S / RMBP’S) . . . . . . . . . . . . .
3. Report any discrepancy immediately. INSTALLATION BASIC HUMIDIFIER CONFIGURATION RECEIVING & UNPACKING EQUIPMENT 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.
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. LOCATION & MOUNTING HUMIDIFIERS NH Series humidifiers are designed to mount on a suitable wall or vertical surface.
Figure #5 Remote Mounted Blower Packs (RMBP) WATER SUPPLY LINE 1. Humidifier is intended to operate on potable (cold) tap water. Wall Side Front 2. 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. A Condensate Steam A 3. If RO or DI is available, blending may increase cylinder life.
4. To increase allowable water column (allowable positive static pressure) an accessory Fill Cup Extension Kit is available from NORTEC. See Figure #8. has been improved to prevent backup despite long or gently sloped drain lines but it can not compensate for flat or uphill runs. 2. 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.
4. Each humidifier is supplied with a wiring diagram inside. LOW VOLTAGE CONTROL WIRING On-Off Controls CONTROL INSTALLATION Figure #9 External Wiring of On/Off Controls 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.
Figure #10 Primary Voltage Supply Wiring VOLTAGE (ACTUAL) PRIMARY (LINE) VOLTAGE WIRING TO UNIT (BY OTHERS) Ground Wire L1 Dedicated Circuit Breaker Or Disconnect L2 - Ground Leg Ground Single Phase Unit. Single Phase Supply. Required Voltage Between L1 And L2. Load Balanced. 2 Pole Terminal Block E X T I N T Ground Wire Ground Leg Ground L1 Dedicated Circuit Breaker Or Disconnect L2 L3 - Neutral Single Phase Unit. 3 Phase Supply. Required Voltage Between L1 And L2.
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. 5. Field-wiring connections for modulation control are to be made to external side of terminals 26, 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. 3.
NHMC OPERATION SIGNAL LIGHT STATUS YELLOW GREEN OFF OFF Off OFF ON Normal operation ON ON Replace cylinder or normal startup operation ON OFF Operation fault 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.
USER LEVEL REMOTE INDICATION The keypad has four keys: MENU, é , ê, ENTER. The NHMC is always internally wired to provide 24 VAC to the terminal strip for optional external remote indication. Up to 100 milliamps is available 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.
On 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. MANUAL CAPACITY ADJUSTMENT The NHB humidifier is rated in lbs/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.
dependent on water supply conditions and 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. 6. The three (3) messages that will appear in sequence are “MAXIMAL LEVEL”, then “CYLINDER SPENT”, and finally “CYL. LIFESPAN END”.
Figure #13 System Messages and Responses (EPROM : 2.XXN) NHMC UNIT STATUS LAMPS SYSTEM MESSAGE DISPLAYED ON LCD REMOTE INDICATION (24 VAC TO:) UNIT CONTACTOR YELLOW GREEN 61-20 “YELLOW” 62-40 “GREEN” 63-36 “RED” Maximal Level ON ON ON OFF ON OFF Excess Current / Error 1 OFF ON OFF ON OFF OFF No Current / Error 2* OFF ON OFF ON OFF OFF Max.
5. Once drained, open the main electrical disconnect during the entire cylinder change operation. messages, instead of two, as summarized in Figure #14. 6. Open plumbing door. Figure #14 YELLOW GREEN OFF OFF Off OFF ON Normal operation ON ON Replace cylinder or normal start-up operation ON OFF Operation fault 7. 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.
6. Remove snap-fit red cap from coil assembly and slide coil off the actuator. Figure #16 Cylinder Plug Installation 7. Loosen actuator with wrench and unscrew from plastic valve body. Cylinder Plug Installation Instruction Cylinder Plug Installation Instruction For Part # 135-4012 (R, Y, or B) for Part # 135-4012 (R,Y or B) 8. Clean the exposed core and spring and plastic drain valve port. 0.50" 10 ga Wire 10 GA Wire 9. Important: Tapered end of spring must be installed toward the solenoid.
malfunction due to foaming. These are just some examples of what can go wrong if the fill and drain rates are not maintained. This feature will reduce the possibility of corrosion of the electrodes and the possible accumulation of algae and bacteria growing in the cylinder. Fill rates of suspect units should be checked. Open the disconnect to cut off all power in the humidifier before reaching inside.
de-energizing the contactor momentarily while it drains. 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. Probable Cause(s): 1.
Response: See Figure #2, NHMC/NHP System Messages displayed and the fill valve does 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.
1. No current being drawn on the monitored primary lead to the cylinder, or the actual current is not being sensed. c) If 24 VAC is not present, then check for 24 VAC across 6 and 14 on the PCB. 2. 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. d) If 24 VAC is not present across 6 and 14 of the PCB, then the problem is with the main PCB. 3.
9. Phase Interrupt - Error 8 (NHMC only) NHB Symptom(s) Diagnosed: The 24 VAC to the main PCB, across terminals 44 and 46 is interrupted. 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.
Probable Cause(s): As pure steam is produced from tap water, most minerals are drained by the auto-adaptive control system. However, it is inevitable that minerals will buildup on the electrodes and strainer inside the steam cylinder. It is unavoidable and the cylinder is intended to be disposable. 2. Max.
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). A 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. Supply water pressure is too low (less than 30 psig). 7. Electronics Symptom(s) Diagnosed: When on/off/drain switch is switched on, green status lamp does not come on.
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. A 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.
OPTIONAL BLOWER PACK ( BUILT-ON OR REMOTE ) TRANSFORMER ( IF REQUIRED ) TWO SPEED SWITCH S 3A FUSE FAN RELAY 24 V COIL T DEDICATED DISCONNECT BY OTHERS SSS L3 L2 L1 EXTERNAL x x x INTERNAL GROUND CLAMP OPTIONAL REMOTE YELLOW INDICATOR Y MAIN SWITCH 1/3 S 3A FUSE SSS OPTIONAL INTERNAL FUSE BLOCK (NHB 050 OR LARGER) 81 82 83 84 85 8 10 81 82 83 84 85 PRI.
OPTIONAL BLOWER PACK ( BUILT-ON OR REMOTE ) TRANSFORMER ( IF REQUIRED ) TWO SPEED SWITCH FAN RELAY 24 V COIL T DEDICATED DISCONNECT BY OTHERS SSS L3 L2 L1 EXTERNAL x x x INTERNAL GROUND CLAMP G PRI. TERMINAL BLOCK OR OPTIONAL FUSE BLOCK ( NHMC 030 OR SMALLER) SSS OPTIONAL INTERNAL FUSE BLOCK (NHMC 050 OR LARGER) SEE EX. W.D.
OPTIONAL BLOWER PACK ( BUILT-ON OR REMOTE ) TRANSFORMER ( IF REQUIRED ) 3A FUSE TWO SPEED SWITCH HIGH LOW S FAN RELAY 24 V COIL BLOWER PACK TERMINAL BLOCKS T DEDICATED DISCONNECT BY OTHERS SSS L3 L2 L1 EXTERNAL G PRI. TERMINAL BLOCK OR OPTIONAL FUSE BLOCK ( NHP 030 OR SMALLER) SSS OPTIONAL INTERNAL FUSE BLOCK (NHP 050 OR LARGER) OPTIONAL MODULATION SEE EX. W.D.
NH Electric Steam Humidifier Humidifier Mandatory Pre Start-up Checklist (p.
NH Electric Steam Humidifier Humidifier Mandatory Start-up Checklist & Quick Reference (p. 1 of 1) Unit Serial #: _ _ _ _ _ _ _ _ # of humidifiers: _____ Tag:_____________ Unit type: Voltage: _____V/___ph Steam output: ____lbs./hr Customer/Job:_______________ Address: ___________________________________ Start-up by: _____________ Date of start-up:___/___/___ ______________________________________________________________________________________________ 1.
NH Electric Steam Humidifier Periodic Maintenance Checklist & Quick Reference (p. 1 of 2) Unit Serial #: _ _ _ _ _ _ _ _ # of humidifiers: _____ Tag:_____________ Unit type: Voltage: _____V/___ph Steam output: ____lbs.
NH Electric Steam Humidifier Periodic Maintenance Checklist & Quick Reference (p. 2 of 2) Unit Serial #: _ _ _ _ _ _ _ _ # of humidifiers: _____ Tag:_____________ Unit type: Voltage: _____V/___ph Steam output: ____lbs./hr Customer/Job:_______________ Address: ___________________________________ Maintenance by: _____________ Date of maintenance:___/___/___ _____________________________________________________________________________ HOW TO INSTALL THE REPLACEMENT CYLINDER 1.
142-3186 142-3189 3P JJS 2P JJS (not shown) 142-3183 142-3174 142-3176 45A JJN 60A JJN (not shown) 142-3160 INTERNAL FUSE MAIN PC BOARD ON/OFF DRAIN SWITCH INDICATOR LAMP 9 10 135-9521C 135-9520 NHP NHP NHMC GREEN 135-9521B NHP 135-3027 145-3001 135-9512 135-9521A NHB 145-3008 NHMC TERMINAL STRIP 145-3008 145-3008 NHB NHP PC BOARD 132-3575 550-600V 132-3380 380V 132-3417 132-3347 347V 132-3460 132-3277 277V 440-480V 132-3230 220-240V 416V 132-3208 208V 142-3110 1
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3 AMP FUSE - IN LINE USER INTERFACE PANEL TERMINAL BLOCK FOR 20 21 22 ELECTRICAL DOOR ELECTRICAL SIDE COVER 24 25 (NOT SHOWN) RELAY OPTIONAL BLOWER PACK KEY FOR LOCK 1 1 1 1 1 1 1 1 1 1 1 1 Consult Factory 145-3904 145-3905 145-3905 145-3912 132-3020 185-3101 185-3102 145-1003 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 /550-600/1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 /208/3 1 1 1 1 1 1 1 1 1 1
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/110-120/1 /208/1 /220-240/1 /277/1 /347/1 /440-480/1 /550-600/1 /208/1 /220-240/1 /277/1 1 1 1 1 1 1 1 1 1 1 FILL VALVE SCREWS BRASS FITTING & WASHER 3/8" STRAIGHT COMP. FTG.
DRAIN CANAL 68 LOCK AND 1 KEY KEY FOR LOCK PLUMBING DOOR MOUNTING BRACKET 75 76 77 78 1 145-7454 145-7023 145-7022 145-7020 1 1 185-3102 145-7654 1 185-3101 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
LIMITED WARRANTY 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.
Model # :_________________________ Serial # :_________________________ Cylinder # :_______________________ Cylinder Last Replaced: _________________________ MTH/DAY/YR _________________________ MTH/DAY/YR NORTEC INDUSTRIES INC. P.O. Box 698 826 Proctor Avenue Ogdensburg, NY 13669 NORTEC AIR CONDITIONING INDUSTRIES LTD*.
