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NH Electrode
Steam Humidifiers
Installation,
Operation, and
Maintenance Guide
IMPORTANT: Read and save these instructions. This
guide to be left with equipment owner.
Form #03-172 1506262
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Table Of Contents INSTALLATION 1 RECEIVING & UNPACKING EQUIPMENT ................................1 PRE-INSTALLATION CHECKPOINT ...................................1 BASIC HUMIDIFIER CONFIGURATION..................................1 LOCATION & MOUNTING.........................................2 HUMIDIFIERS ...............................................2 BLOWER PACKS .............................................2 STEAM DISTRIBUTORS..........................................3 PLUMBING.................
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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) .............15 TROUBLESHOOTING 15 STARTING POINT ............................................15 USING THE WIRING DIAGRAM ...................................
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3. Report any discrepancy immediately. INSTALLATION BASIC HUMIDIFIER CONFIGURATION RECEIVING & UNPACKING EQUIPMENT NORTEC humidifier models NHMC, NHP and 1. Check packing slip to ensure ALL material has NHB share a modular sheet metal cabinet. Each unit been delivered. has a right side electrical compartment. Each electrical compartment has a hinge-down front door 2. All material shortages are to be reported to NORTEC within 48 hours from receipt of goods. which is removable from any partially o
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better, into a vertical structural surface. If any LOCATION & MOUNTING spacer material is used between the bracket and the structural material such as drywall, increase HUMIDIFIERS 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 NH Series humidifiers are designed to mount on a from being bumped off the wall bracket. See suitable wall or vertical surface. Do not sit on floor due Figure #3.
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Figure #5 WATER SUPPLY LINE Remote Mounted Blower Packs (RMBP) 1. Humidifier is intended to operate on potable (cold) Wall tap water. Side Front 2. If the raw water is very hard, NORTEC can provide longer cylinder life on softened water. A 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. 3. If RO or DI is available, blending may increase cylinder life. Consult factory. Power an
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has been improved to prevent backup despite long 4. To increase allowable water column (allowable or gently sloped drain lines but it can not positive static pressure) an accessory Fill Cup compensate for flat or uphill runs. Extension Kit is available from NORTEC. See Figure #8. 2. The drain line should not end in a sink used frequently by personnel, or where plumbing codes Figure #8 prohibit it. Route to a floor drain or equivalent for Fill Cup Extension Kit to Overcome Static Pressure safety
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4. Each humidifier is supplied with a wiring diagram LOW VOLTAGE CONTROL WIRING inside. On-Off Controls CONTROL INSTALLATION Figure #9 1. Mount any wall humidistat (control or high limit) External Wiring of On/Off Controls over standard electrical box at height similar to typical thermostat. Any wall humidistat should be in location representative of overall space A being humidified and not in path of blower pack or air supply grille. Do not mount on a outside wall B where temperature fluctuatio
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Figure #10 Primary Voltage Supply Wiring VOLTAGE PRIMARY (LINE) VOLTAGE WIRING TO UNIT (BYOTHERS) (ACTUAL) Ground Wire Ground Leg Ground L1 Dedicated 2 Pole Circuit Terminal Breaker L2 Or Block Disconnect - Single Phase Unit. - Single Phase Supply. E I - Required Voltage Between L1 And L2. X N - Load Balanced. T T Ground Wire Ground Leg Ground L1 Dedicated 2 Pole Circuit Terminal Breaker L2 Block Or Disconnect L3 - Single Phase Unit. - 3 Phase Supply. E I Neutral - Required Voltage Between L1 An
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5. Field-wiring connections for modulation control are pre-selected when ordering the option. NORTEC to be made to external side of terminals 26, 28, 30 offers several packages for NHMC/NHP Series and 32 on humidifier’s control terminal strip. humidifiers. Wire according to NORTEC supplied Always refer to the external control’s wiring external wiring that comes with each optional diagram factory supplied with each NORTEC modulation package. modulation control option. 3. Optional modulation packa
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NHMC OPERATION SIGNAL LIGHT STATUS YELLOW GREEN START-UP SELF TEST OFF OFF Off Observe the LCD display when the on/off/drain OFF ON Normal operation switch is first pushed on. The microcomputer pc board ON ON Replace cylinder or normal will check the system components, display in words startup operation what it is doing and provide a message if any faults are found. The start-up self-test sequence will be ON OFF Operation fault displayed as follows: LCD EXPLANATION/COMMENTS The prerequisites for
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USER LEVEL REMOTE INDICATION The keypad has four keys: MENU, ,, The NHMC is always internally wired to provide 24 ENTER. VAC to the terminal strip for optional external remote indication. Up to 100 milliamps is available at each of Each time the user presses the menu key, the three terminal pairs (61-20, 62-40, 63-36) for activating microcomputer will display on the LCD the next yellow, green and red lamps ordered as options from operating parameter on the menu. The basic display NORTEC or for
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MANUAL CAPACITY ADJUSTMENT On the NHP, the optional output indication meter will steadily increase until the meter reads maximum The NHB humidifier is rated in lbs/hr of steam output. Maximum output depends on the manual output capacity. Set to 100%, it will operate at full capacity setting of the unit and/or the continuous output until the humidistat has sensed that the control demand. humidity has reached setpoint. Then it will stop the humidifier by breaking control circuit 8-10. The NHB/NHP
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6. The three (3) messages that will appear in dependent on water supply conditions and humidifier sequence are “MAXIMAL LEVEL”, then usage. Failure to replace the cylinder at the end of “CYLINDER SPENT”, and finally “CYL. LIFESPAN cylinder life may result in unit damage. NORTEC is END”. The yellow unit status lamp will be on not responsible for any damages resulting from, or during all three. attributable to, the failure to replace a used cylinder 7. The green unit status lamp, primary contactor
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Figure #13 System Messages and Responses (EPROM : 2.XXN) NHMC UNIT STATUS LAMPS REMOTE INDICATION (24 VAC TO:) SYSTEM MESSAGE UNIT 61-20 62-40 63-36 DISPLAYED ON LCD CONTACTOR YELLOW GREEN “YELLOW” “GREEN” “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. Filling Time / Error 3 OFF ON OFF ON OFF OFF Cylinder Spent / Error 4 ON ON ON OFF ON ON No Current / Error 5 OFF ON OFF ON OFF OFF Output Too Low / Error 6 O
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messages, instead of two, as summarized in 5. Once drained, open the main electrical disconnect Figure #14. during the entire cylinder change operation. 6. Open plumbing door. Figure #14 7. Cylinder plugs are attached to the primary voltage cylinder wires. (The plugs remain attached to the YELLOW GREEN wires unless they have to be replaced due to Off OFF OFF damage.) The plugs are press-fitted over the electrode pins protruding from the top of the Normal operation OFF ON cylinder. Remove cylinde
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6. Remove snap-fit red cap from coil assembly and Figure #16 slide coil off the actuator. 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 0.50" drain valve port. 0.50 10 ga Wire 10 GA Wire Cylinder plug Cylinder Plug 9. Important: Tapered end of spring must be i
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This feature will reduce the possibility of corrosion malfunction due to foaming. These are just some of the electrodes and the possible accumulation of examples of what can go wrong if the fill and drain algae and bacteria growing in the cylinder. rates are not maintained. Fill rates of suspect units should be checked. BUILT ON AND REMOTE MOUNTED Open the disconnect to cut off all power in the BLOWER PACKS (BOBP’s / RMBP’s) humidifier before reaching inside. One of the 24VAC wires to each prima
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Clean the drain valve; start with a fresh cylinder. de-energizing the contactor momentarily while it Then measure the manual drain time with and without drains. the external drain connected. Is the external drain impeding flow? NORTEC recommends an open Probable Cause(s): external drain line. See Form #XX-161. 1. Cylinder water is over-concentrated (too conductive) due to restricted drain, short-cycling NHMC/NHP by controls, supply water not within acceptable limits (too conductive), improper fi
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Response: See Figure #2, NHMC/NHP System displayed and the fill valve does not energize (green Messages LED must be illuminated), the main PCB is defective. If Maximal level is displayed, a problem exists with 4. Max. Filling Time - Error 3 the cylinder or the high water sensor PCB. A voltage of 85 VAC or greater across the orange wires of the Symptom(s) Diagnosed: Time dependent. high water PCB ( one orange wire terminates at the Neither Maximal Level (full cylinder) is detected, white sensor p
