NHRS Series TM RESISTIVE ELEMENT STEAM HUMIDIFIER Engineering Manual Manual No.
PROPRIETARY NOTICE This document and the information disclosed herein are proprietary data of WALTER MEIER LTD. Neither this document nor the information contained herein shall be reproduced used, or disclosed to others without the written authorization of WALTER MEIER LTD., except to the extent required for installation or maintenance of recipient’s equipment. All references to the NORTEC name should be taken as referring to WALTER MEIER LTD. LIABILITY NOTICE WALTER MEIER LTD.
TABLE OF CONTENTS Subject Page 10-00 INTRODUCTION 1. PRINCIPLE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 10-10 HUMIDITY, STEAM ABSORPTION & DISTRIBUTION 1. A. B. C. D. 2. A. B. C. D. E. F. 3. 4. 5. 6. A. B. C. D. 7. A. B. CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 STANDARD CONTROLLERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIST OF FIGURES Figure Page 10-00 INTRODUCTION Figure 1. NHRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 10-10 HUMIDITY, STEAM ABSORPTION & DISTRIBUTION Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Display Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 NHRS Physical Data - 010-090. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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1. PRINCIPLE OF OPERATION (1) The NORTEC NHRS uses an advanced control system to monitor and maintain optimum operating conditions within the humidifier cylinder. (2) The NHRS humidifier operates on Potable, DI (De-ionized), or RO (Reverse osmosis) water supply. All components are suitable for DI/RO water operation as a standard. (3) When the unit is activated in the ON position, and there is a call for humidity, the tank will fill with water through the fill cup located, in the back of the unit.
Figure 1.
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-10 HUMIDITY, STEAM ABSORPTION & DISTRIBUTION 10-10 Page 1 2008-02-18
1. CONTROLS A. STANDARD CONTROLLERS (1) NORTEC has a wide range of modulation packages for use with the NHRS humidifiers. The packages all provide humidity controllers complete with point for accuracy up to ±3%. For accuracy up to ±1% a high precision humidistat is required. B. FULLY INTEGRATED MODULATION ADAPTER (1) The NORTEC NHRS includes all the circuitry necessary to accept a modulating signal from most modulating humidity controllers with a set point supplied by others.
D. VARIABLE AIR VOLUME (VAV) CONTROL SYSTEM (1) NORTEC offers several VAV control packages where VAV or variable duct temperature, air flow or humidity conditions require additional control flexibility. 2. STANDARD FEATURES AND BENEFITS (1) NORTEC NHRS humidifiers can be suited for all humidity control applications. Resistive heating elements satisfy controller requirements instantaneously for rapid control with minimum deviation.
3. ELECTRICAL (1) Humidifiers require field wiring to the primary voltage terminal block. Power and fusing requirements are as indicated on the Specification label. Wiring is fed through an electrical knockout in the bottom back of the electrical cabinet. 4. CLEARANCES (1) The clearance dimensions shown in the manual are for reference only and are the minimum requirements for maintenance of the humidifier. 5. WATER REQUIREMENTS (1) The NHRS will operate properly on all potable water sources.
Table 1. Technical Data NHRS Model / Capacity (lbs/hr) VOLTAGE PHASE RATED AMPS RATED K.W. MAX. EXT. CIRCUIT PROTECTION 010 [11.25] 010 [11.25] 010 [11.25] 010 [11.25] 208 230 460 575 1 1 1 1 18.39 15.94 7.97 6.38 3.83 3.83 3.83 3.83 25 20 15 15 015 015 015 015 208 230 460 575 1 1 1 1 24.52 21.25 10.63 8.50 5.10 5.10 5.10 5.10 35 30 15 15 020 [22.5] 020 [22.5] 020 [22.5] 020 [22.5] 208 230 460 575 1 1 1 1 36.78 31.88 15.94 12.75 7.65 7.65 7.65 7.
Figure 2.
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1. HUMIDIFIERS A. GENERAL (1) Work Included (a) (b) (c) (2) NORTEC NHRS Resistive Element steam humidifier[s] as indicated on drawing[s] and as indicated on schedule[s]. Complete and operable humidification system [which meets applicable building codes]. Equipment start-up and project inspection by qualified factory trained representative. Quality Assurance (a) (3) Manufacturer: For each product specified, provide components by same manufacturer throughout.
(4) Extra Material (a) (5) References (a) (6) Furnish extra materials described below that match products installed and that are packaged with protective covering for storage and identified with labels describing contents. ANSI/NFPA 70 - National Electrical Code. Coordination (a) Coordinate location and installation of humidifiers in ducts and air-handling units. Revise locations and elevations to suit field conditions and to ensure proper humidifier operation.
(vii) Float level check. (viii) Drain pump check. (c) (ix) Dual signal status light indicates unit operation. (x) Cabinet has powder coated paint finish with removable door to allow the user full front access. (xi) Plumbing door interlock safety switch. Factory mounted, alpha numeric, Liquid Crystal Display (LCD) provides full operational status. Display to include a keypad for user interface and adjustment of operational parameters including: (i) Unit output (lbs/hr or kg/hr).
3. (b) Seal humidifier dispersion-tube duct penetrations with flange. (c) Install with required clearance for service and maintenance. TESTING (a) System verification testing is part of the commissioning process. Verification testing shall be performed by the Contractor and witnessed and documented by the Commissioning Authority. Refer to section 01810, Commissioning, for system verification tests and commissioning requirements. XXXXX OR XXXXX (b) 3.
2. ACCESSORIES / OPTIONS AVAILABLE A. NHRS UNIT CONFIGURATION OPTIONS (1) Solid State Relay option provides the highest level of relative humidity control available. With de-ionized water and high precision control the Solid State Relay option is capable of maintaining ±1% relative humidity control. For ordering information see H.E.L.P. software or contact factory.
E. BLOWER PACK (1) Wall mounted direct steam distribution system allows for direct space/room humidification when steam introduction into a ducted system is not feasible. The factory assembled remote mounted blower pack includes an integral steam distributor, 3 direct drive fans. F. SHORT ABSORPTION MANIFOLDS (1) This distribution system will allow a short absorption distance to be obtained. Refer to SAM-e Engineering Manual Form #XX-247. G.
WARRANTY (1) WALTER MEIER INC. and/or WALTER MEIER LTD. (hereinafter collectively referred to as THE COMPANY), warrant for a period of two years after installation or 30 months from manufacturer’s ship date, whichever date is earlier, 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.
U.S.A. Walter Meier (Climate USA) Inc. CANADA Walter Meier (Climate Canada) Ltd. 826 Proctor Avenue Ogdensburg, NY 13669 TEL: 1-866-NORTEC-1 EMAIL: northamerica.climate@waltermeier.com WEBSITE: www.humidity.
