Nortec NHRS User Manual
NHRS
TM
Series
RESISTIVE ELEMENT
STEAM HUMIDIFIER
Engineering Manual
Manual No. H-104
2008-02-18
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 re ferences to the NORTEC name should be
taken as referring to WALTER MEIER LT D.
LIABILITY NOTICE
WALTER MEIER LTD. does not accept any liability for installations of humidity equipment installed
by unqualified personnel or the use of parts/components/equipment that are not authorized or
approved by WALTER MEIER LTD..
COPYRIGHT NOTICE
Copyright 2008, WALTER MEIER LTD. All rights reserved.
RECORD OF REVISIONS
For each revision, put the revised pages in your manual and disca rd the superseded pages. W rite the
revision number and revision date, date put in manual, and the incorporator’s initials in the applicable
columns on the Record of Revisions.
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2008-02-18
TABLE OF CONTENTS
Subject Page
10-00 INTRODUCTION
1. PRINCIPLE OF OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
10-10 HUMIDITY, STEAM ABSORPTION & DISTRIBUTION
1. CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
A. STANDARD CONTROLLERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
B. FULLY INTEGRATED MODULATION ADAPTER . . . . . . . . . . . . . . . . . . . . . . . . . . .2
C. SIGNAL BY OTHER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
D. VARIABLE AIR VOLUME(VAV) CONTROL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . .3
2. STANDARD FEATURES AND BENEFITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
A. INTEGRAL DRAIN WATER COOLER (DWC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
B. TWO-LINE ALPHANUMERIC LIQUID CRYSTAL DISPLAY (LCD) . . . . . . . . . . . . . .3
C. AUTOMATIC SYSTEMS TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
D. AUTOMATIC END OF SEASON DRAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
E. AUTOMATIC DETECTION, RESPONSE, AND SYSTEM MESSAGES. . . . . . . . . . . 3
F. SIMPLE INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3. ELECTRICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
4. CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
5. WATER REQUIREMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6. STEAM DISTRIBUTION AND ABSORPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
A. IN-DUCT INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
B. OUTSIDE DUCT INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
C. VERTICAL IN-DUCT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
D. DRAIN WATER COOLING OPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7. BLOWER PACKS (BOBP, RMBP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
A. BLOWER PACKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
B. PRIMARY VOLTAGE CONNECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10-20 SPECIFICATION
1. HUMIDIFIERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
A. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
B. PRODUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
C. EXECUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2. ACCESSORIES / OPTIONS AVAILABLE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
A. HUMIDISTAT WITH INTEGRAL SENSOR AND CONTROLLER. . . . . . . . . . . . . . . .6
B. HUMIDISTAT WITHOUT INTEGRAL SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
C. STEAM DISTRIBUTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
D. REMOTE MOUNTED BLOWER PACKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
E. SHORT ABORPTION MANIFOLDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
F. ON/OFF CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
G. SSR COOLING KIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
H. KEEP WARM OPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
I. REMOTE FAULT INDICATION PACKAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
J. NORTEC LINKS OPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
WARRANTY
2008-02-18
LIST OF FIGURES
Figure Page
10-00 INTRODUCTION
Figure 1. NHRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
10-10 HUMIDITY, STEAM ABSORPTION & DISTRIBUTION
Figure 1. Display Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Figure 2. NHRS Physical Data - 010-090. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. NHRS Physical Data - 135-180. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4. RMBP Physical Data Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5. Remote Mounted Blower Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
LIST OF TABLES
Table Page
10-10 HUMIDITY, STEAM ABSORPTION & DISTRIBUTION
Table 1. Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
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10-00
INTRODUCTION
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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.
(4) The water level is being sensed by the float chamber. It contains a dual magnetic
float assembly to ensure accurate water level is maintained in the cylinder. Three
LEDs on the float chamber indicate the water level.
(5) The bottom red LED is the security level to ensure water is above the heating
elements. The middle green light is the optimum operational level for the heating
elements. The top yellow light is the maximum water level. The float chamber
distinguishes 5 different water levels between the red LED and the yellow LED. The
micro-computer can respond to fluctuations in water level to schedule draining and
filling of the cylinder without affecting the steam generating process.
(6) At start up, the floats rise in the float chamber, the internal micro-computer evaluates
the rise of each float to ensure it is equal. This way, the system ensures the fill valve
is functioning properly and that both floats are operational. When the water level
reaches the top indication level, the system will flush the water down to the green
LED. This ensures correct operation of the drain pump and reading of the floats by
the micro-computer
(7) Then, relying on feedback from the signal received by the humidifier, the internal
controller will ensure operation of the contactors to power heating elements.
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Figure 1. NHRS
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