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MES-U Electrode
Steam Humidifiers
Installation, Operation,
Maintenance, Spare Parts, and
Exploded Views Guide
IMPORTANT: Read and save this guide for future
reference. This guide to be left with equipment owner.
Form 03-111 Rev. 1
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Table of Contents INSTALLATION 1 – RECEIVING EQUIPMENT..............................1 – PRINCIPAL OF OPERATION ............................1 – WATER SUPPLY AND PLUMBING..........................2 – WATER CONNECTION .............................2 – START-UP AND OPERATION............................2 – CAPACITY ADJUSTMENT............................3 – CYLINDER REPLACEMENT.............................3 – WHEN TO REPLACE THE STEAM CYLINDER ...................3 – REMOVING THE OLD CYLINDER...........
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Figure #1 INSTALLATION Operation Schematic RECEIVING EQUIPMENT 1. Check packing slip to ensure ALL material has CONDENSATE RETURN (OPTIONAL) been received. 2. Inspect box for damage and note on shipping waybill accordingly. FILL STEAM HOSE CUP 1” AIR GAP 1 2 3 3. After unpacking, inspect unit for damage and if damage is found, advise shipper as soon as ELECTRODES possible. 1. INLET CHAMBER 2. FILL CHAMBER 4. Inspect unit (humidifier) to ensure it is the correct 3. WATER OVERFLOW CHAMBER (SAFETY
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for water pressure from 30 to 85 psi and are WATER SUPPLY AND PLUMBING protected by the built-in strainer. 1. The orifice in the fill valve is sized for an extended 4. For inlet water pressure outside this range, the water pressure range of 30 to 85 psi. factory should be contacted. (See Water Supply and Plumbing section of this manual.) 2. For water pressure between 15 and 30 psi, notify the factory and the next larger size fill valve will be supplied. START-UP AND OPERATION 3. For cases below
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out and the fill solenoid will again open until the cylinder is completely used as indicated by the red cylinder is again full. high water sensor light illuminated on the cabinet. When this condition is reached, a new replacement This cycling of the red light and fill valve will cylinder is to be installed. continue until the unit’s full output capacity is reached after which the water level will automatically lower NOTE: Red light may come on during initial itself in the cylinder. (The increase
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2. The old cylinder must be drained completely 3. The white sensor plug on all units is for the sensor before removing. This is done by pushing the auto pin, which always goes on the single pin offset on/off/drain switch to the “drain” position. from the others. See Figure # 5. 3. When completely drained, push the auto 4. Ensure that cylinder plugs are very snug on the on/off/drain switch to the “off” position. pins. 4. Open the main disconnect during the entire 5. For loose fitting plugs, a tem
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is normally caused by short cycling, a restricted drain, Recheck that the “auto on/off/drain” switch is still or back pressure. The foam, generated in these at “on”. If it is, then shut off the main disconnect and instances, is conductive and may lead to false full check fuses or breaker of the main disconnect. If they cylinder indication if the level of the foam approaches are serviceable, turn power back on. the top of the cylinder. To test for a defective “auto on/off/drain” switch, BACK PRES
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Red “Change Cylinder” light on - Water NOT at top of cylinder: Water foaming to top of cylinder causing false full cylinder indication. This also may be accompanied by arcing (flashing) inside cylinder. Refer to “Terms Used” regarding foaming. Water remains at high level and won’t concentrate: This is normal on cold start-up and can be accelerated by adding maximum 1/2 tsp. of dissolved salt to the cylinder (through the plastic fill cup) on fill cycle. See “Low Water Conductivity” section of thi
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DIMENSIONS MES-U / MES-P DEPTH WIDTH in.(cm) WIDTH in.(cm) HEIGHT in.(cm) (REMOTE ELECTRICAL) (ATTACHED ELECTRICAL) in.(cm) 5* 6.6 (16.7 cm) 8.6 (21.9 cm) 10.7 (27.1 cm) 13.5 (34.4 cm) 10 6.6 (16.7 cm) 8.6 (21.9 cm) 10.7 (27.1 cm) 17.3 (43.9 cm) 15 8.4 (21.3 cm) 10.5 (26.7 cm) 12.6 (32.2 cm) 19.4 (49.3 cm) 20 8.4 (21.3 cm) 10.5 (26.7 cm) 12.6 (32.2 cm) 19.4 (49.3 cm) 25 10.5 (26.7 cm) 10.5 (26.7 cm) 12.6 (32.2 cm) 21.3 (54.0 cm) 30 10.5 (26.7 cm) 10.5 (26.7 cm) 12.6 (32.2 cm) 21.3 (54.0 cm) WEIG
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PRIMARY POWER 24 VAC INPUT (By Others) PRIMARY ON/OFF CONTACTOR CONTROLS 24 vac (By Others) PRIMARY TERMINAL .187 insulated fast-on BLOCK For field connection (provided with PVC unit) 3 AMP FUSE ON SWITCH OFF HIGH WATER DRAIN SENSOR PCB FILL VALVE DRAIN HIGH VOLTAGE VALE ELECTRODE LEADS (BY OTHERS OR INCLUDED WITH PVC UNIT) CHANGE CYLINDER -2 LEADS LAMP FOR SINGLE PHASE -3 LEADS CURRENT FOR THREE TRANSFORMER PHASE MES-U CONTROL BOARD STEAM CYLINDER NOTE: SOLID LINES WIRING BY OTHERS MES-U INTERN
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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. No warranty is made against corrosion, deterioration, or suitability of substituted materials used as a result o
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Model # :_________________________ Serial # :_________________________ Cylinder # :_______________________ Cylinder Last Replaced: _________________________ MTH/DAY/YR _________________________ MTH/DAY/YR _________________________ MTH/DAY/YR NORTEC INDUSTRIES INC. NORTEC AIR CONDITIONING P.O. Box 698 INDUSTRIES LTD*. 826 Proctor Avenue 2740 Fenton Road Ogdensburg, NY 13669 Ottawa, ON K1T 3T7 A WMH COMPANY PRINTED IN CANADA
