Nortec NH User Manual
NH
TM
Series
NHTC / NHPC
ELECTRODE
STEAM HUMIDIFIER
Inst allation Manual
2522381-C
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 exte nt 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. 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.
SPECIFICATION LABEL LOCATION
The Specification Label for your NH Series Humidifier is located on the bottom of the unit. You will
find it attached to the skirt that separates the electrical and plumbing comp ar tments on the electrical
compartment side.
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For each revision, put the revised pages in your manual and disca rd the superseded pages.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.
Revision
Number
Revision
Date
Date Put
In Manual By
Revision
Number
Revision
Date
Date Put
In Manual By
2008-08-28
TABLE OF CONTENTS
Subject Page
10-00 INTRODUCTION
1. PREINSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
A. RECEIVING & UNPACKING EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2. PACKAGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
A. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
B. HUMIDIFIER AND CONTROLS BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
C. DISTRIBUTOR BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
D. ACCESSORIES BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3. PREINSTALLATION EQUIPMENT VERIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
A. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
10-10 INSTALLATION PROCEDURES
1. HUMIDIFIER INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
A. LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
B. MOUNTING WITH KEYHOLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
C. MOUNTING WITH WALL BRACKET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
D. WATER SUPPLY LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
E. DRAIN LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
F. STEAM RUNS AND CONDENSATE RETURNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
G. ELECTRICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
H. CONTROL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
I. OPTIONAL OUTDOOR TEMPERATURE RESET FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
J. HUMIDITY TRANSDUCER SIGNAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
K. NETWORKING NHTCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
L. NORTEC ONLINE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
10-20 OPERATION
1. NHTC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
A. NHTC COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
B. HUMIDIFIER START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
C. BASIC STEAM PRODUCTION METHOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
D. CYLINDER LIFE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
E. SOFTWARE INITIAL SELF-TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
F. SOFTWARE FLOW CHART WITH DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
G. SELF-HELP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
H. SYSTEM MESSAGES AND LIGHTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
I. DOUBLE UNIT OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
2. STEAM DISTRIBUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
A. STEAM DISTRIBUTOR OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
B. SAM-E OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
C. BLOWER PACK OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
3. CONTROLS AND REMOTE COMMUNICATION (OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
A. DIGITAL CONTROL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
B. DIGITAL TRANSDUCER OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
C. REMOTE CONNECTIONS (OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
D. NORTEC LINKS OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
E. NORTEC ONLINE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
10-30 MAINTENANCE PROCEDURES
1. NH ELECTRODE STEAM HUMIDIFIERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
A. MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
B. WHEN TO REPLACE THE STEAM CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
C. EXTENDED SHUT-DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
D. COMPONENTS OF THE STEAM CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
2008-08-28
E. HOW TO REMOVE THE STEAM CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
F. MANDATORY CLEANING OF THE DRAIN VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
G. HOW TO INSTALL THE REPLACEMENT CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
10-40 TROUBLESHOOTING
1. TROUBLESHOOTING NH ELECTRODE STEAM HUMIDIFIERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
A. PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
B. STARTING POINT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
C. NHTC/NHPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
2. TROUBLESHOOTING DISTRIBUTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
A. TROUBLESHOOTING ATMOSPHERIC DISTRIBUTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
3. SAM-E TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
A. PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
4. BLOWER PACKS TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
A. PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
5. DIGITAL ON/OFF HUMIDISTAT SENSOR CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
A. PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
6. 0-10V DIGITAL HUMIDISTAT SENSOR CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
A. PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
10-50 TECHNICAL
1. WIRING AND TERMINALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
A. HUMIDIFIER CONTROL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
B. NH WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
2. CHECK LISTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
A. PRE-NORTEC ONLINE START UP CHECKLIST WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
B. PRE-NORTEC LINKS START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
C. HUMIDIFIER MANDATORY PRE-START UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
D. HUMIDIFIER MANDATORY START-UP CHECKLIST AND QUICK REFERENCE . . . . . . . . . . . . . . . .73
E. PERIODIC MAINTENANCE CHECKLIST AND QUICK REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . 74
3. SPARE PARTS AND EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
A. ASD, BSD, CSD DISTRIBUTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
B. SAM-E SPARE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
C. NH SERIES HUMIDIFIER SPARE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
WARRANTY
2008-08-28
LIST OF FIGURES
Figure Page
10-00 INTRODUCTION
Figure 1. NHTC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Figure 2. Humidifier Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Figure 3. Distributor Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Figure 4. SAM-e Distributor Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Figure 5. Remote Mounted Blower Pack Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Figure 6. Typical NHTC Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
10-10 INSTALLATION PROCEDURES
Figure 1. Clearances and Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Figure 2. Mounting with Keyholes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Figure 3. Mounting with Mounting Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Figure 4. Drain Water and Supply Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Figure 5. Steam Run and Condensate Return Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Figure 6. Steam Run and Condensate Return Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Figure 7. Primary Voltage Supply Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Figure 8. On-Off Control Guidelines and Low Voltage Terminal Strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Figure 9. NORTEC Control Guidelines and Wiring (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Figure 10. Setpoint Versus Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Figure 11. NORTEC Humid ity T r ansducer Guidelines and Wiring (Optional) . . . . . . . . . . . . . . . . . . . . . . . . .24
Figure 12. Networking NHTC s (Optiona l) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Figure 13. NORTEC On Line Installation Guidelines (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
10-20 OPERATION
Figure 1. NHTC Components (Front View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 2. NHTC Components (Side View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 3. Humidifier Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 4. Drain Rate Versus Water Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Figure 5. Capacity Setting and Cylinder Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Figure 6. Basic Steam Production Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 7. Software Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Figure 8. Steam Distributor Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Figure 9. SAM-e Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Figure 10. Blower Pack Operation and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Figure 11. NORTEC Digital Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Figure 12. Difference from Setpoint in Relation to Demand Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Figure 13. Duct and Wall Mounted Transdu cer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
10-30 MAINTENANCE PROCEDURES
Figure 1. Cylinder Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Figure 2. Cylinder Removal Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 3. Drain Valve Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Figure 4. Cylinder Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
10-50 TECHNICAL
Figure 1. NHTC/NHPC Double Unit Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Figure 2. NHTC/NHPC Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
Figure 3. Distributor Exploded View and Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Figure 4. SAM-e Exploded View and Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Figure 5. NHTC/NHPC Plumbing Compartment Exploded View and Spare Parts . . . . . . . . . . . . . . . . . . . . .77
Figure 6. NHTC/NHPC Electrical Compartment Exploded View and Spare Parts . . . . . . . . . . . . . . . . . . . . .80
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LIST OF TABLES
Table Page
10-10 INSTALLATION PROCEDURE
Table 1. Maximum Recommended Length of Steam Runs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Table 2. Steam Line Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Table 3. Recommended Material and Size for Steam Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Table 4. Recommended Condensate Line at Distributor(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Table 5. Equivalent Length Elbow and T-Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Table 6. Humidifier and Distributor Inlet/Outlet Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
10-20 OPERATION
Table 1. NHTC / NHPC Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-30
Table 2. Self-Test Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Table 3. Signal Light Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Table 4. Status Messages with LED State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
10-40 TROUBLESHOOTING
Table 1. Troubleshooting Symptoms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Table 2. Ensuring A Demand Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Table 3. NH System Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Table 4. Term Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
10-50 TECHNICAL
Table 1. Controller and Sensor Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Table 2. NHTC/NHPC Plumbing Part List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Table 3. NHTC/NHPC Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
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10-00
INTRODUCTION
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Figure 1. NHTC
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1. PRE-INSTALLATION
A. RECEIVING & UNPACKING EQUIPMENT
(1) Check packing slip to ensure ALL material has been delivered.
(2) All material shortages are to be reported to NORTEC within 48 hours from receipt
of goods. NORTEC assumes no responsibility for any material shortages beyond
this period.
(3) Inspect shipping boxes for damage and note damages on shipping waybill
accordingly.
(4) After unpacking, inspect equipment for damage and if damage is found, notify the
shipper promptly.
(5) All NORTEC products are shipped on an FOB factory basis. Any and all damage,
breakage or loss claims are to be made directly to the shipping company.
2. PACKAGING
A. GENERAL
(1) The equipment packaging is standardized in that each box in the shipment will
always have the same contents. The following paragraphs identify the contents of
each box.
B. HUMIDIFIER AND CONTROLS BOX
(1) The typical equipment found in the humidifier and controls box is shown in Figure
2. The contents of the box are listed on the box. If controls are ordered they will be
listed and small accessories that fit into the box will also be listed on the box.
C. DISTRIBUTOR BOX
(1) Depending on the equipment ordered any of the following distributor box
configurations may be received:
a. For equipment received if an ASD, BSD, CSD distributor(s) is ordered refer to
Figure 3.
b. For equipment received if a SAM-e distributor is ordered refer to Figure 4.
c. For equipment received if a RMBP i s ordered refer to Figure 5.
D. ACCESSORIES BOX
(1) Additional accessories such as DWC, DWSP, Filter, and Fill cup extension kits are
shipped in a separate box. Smaller accessories that would fit in the humidifier box
are put in the humidifier box and the box is identified as containing such.
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BAG WITH
MANUAL,
CLAMPS,
HOSE SECTION
CONTROLS
(IF ORDERED
ONLY)
BOX WITH
ABBREVIATED
INSTRUCTIONS
AND BOX
CONTENT
STICKERS
Figure 2. Humidifier Box
HUMIDIFIER
STEAM HOSE
SECTION (NOT
SUPPLIED IF BUILT
ON BLOWER PACK
ORDERED)
H096
Figure 3. Distributor Box
Figure 4. SAM-e Distributor Box
Figure 5. Remote Mounted Blower Pack Box
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3. PREINSTALLATION EQUIPMENT VERIFICATION
A. GENERAL
(1) Ensure that available voltage and phase corresponds with humidifier voltage and
phase as indicated on humidifier’s specification label.
(2) Ensure that the dedicated external fuse disconnect is of sufficient size to handle
the rated amps as indicated on the specification label. Refer to local codes.
(3) Report any discrepancy immediately to the site engineer.
(4) Location and mounting is described in Chapter 10-10.
(5) Typical installation (See Figure 6.) shows the references to the appropriate
chapter of the manual.
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Figure 6. Typical NHTC Installation (Sheet 1 of 2)
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Figure 7. Typical NHTC Installation (Sheet 2 of 2)
THIS PAGE INTENTIONALLY LEFT BLANK
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10-10
INSTALLATION
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1. HUMIDIFIER INSTALLATION
A. LOCATION
(1) The NORTEC NHTC series humidifier is designed to mount on a suitable wall or
vertical surface. Do not sit the unit on the floor due to clearances required for
plumbing and electrical connections. The clearance dimensions shown in this
manual are for reference only and are the minimum required for maintenance on
the humidifier. Local and national codes should be consulted before final location
and installation of the humidifier. NORTEC cannot accept responsibility for
installation code violations. See Figure 1 Clearances and Operating Conditions.
(2) The location of the humidifier should be below the steam distributor. DO NOT
locate the humidifier any further then absolutely necessary from the steam
distributor location as net output will be reduced as a result of heat loss through the
steam line.
(3) When possible, mount the NHTC humidifier at a height convenient for servicing.
B. MOUNTING WITH KEYHOLES
(1) The NHTC series humidifier is wall mounted using keyholes located on the back of
the unit’s cabinetry. The keyholes are spaced 16 inches apart center to center for
large units and 10.7 inches apart for small as per UL certification standard stud
spacing dictates.
(2) Use #12 x 3 in. screws. 2 screws are needed for a single unit (NHTC 010 to 100
lbs/hour). 3 screws are needed for a double unit (NHTC 150 to 200 lbs/hour). Insert
the screw 16 in. apart. Be sure the screws are level to each other. Proceed to
insert the screws into the studs until there is 1/4 in. of screw exposed. Ensure the
screws are properly anchored to the wall.
(3) Raise the unit. Align the keyholes on the back of the unit with the screws. Place the
screws through the keyholes. Make sure the unit is level then tighten the screws to
secure the unit in place.
(4) Once the unit is securely fixed to the wall, install the “L” shaped brackets into the
same studs the unit is attached to. Place the brackets on top of the unit, inline with
the studs. Using the appropriate sized wood screw fasten the “L” brackets to the
studs securing the unit from any upward motion. See Figure 2 Mounting with
keyhole.
C. MOUNTING WITH WALL BRACKET
(1) For NHTC units that mount using a Wall mounting bracket 3 x #12 3.0 inch wood
screws are to be used.
(2) Wall mounting bracket provided should be securely attached horizontally with open
edge upwards, using field-supplied fasteners. Be sure the bracket is mounted level
See Figure 3.
(3) If humidifiers are mounted on a roof, a thermostatically ventilated weather proof
cabinet should be used. Consult factory.
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D. WATER SUPPLY LINE
(4) All water supply and drain line connections should be installed in accordance with
local plumbing codes.
(5) For installation details see Figure 5 & 6.
E. DRAIN LINE
DRAIN WATER FROM HUMIDIFIER CAN BE VERY HOT.
(1) 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.
(2) For installation details see Figure 4.
F. STEAM RUNS AND CONDENSATE RETURNS
(1) Tables 1 through 6 indicate what material and recommended length to use when
installing atmospheric steam lines. The lengths mentioned are equivalent feet and
therefore the full length of tubing with the addition of equivalent feet of elbows and
tees.
CAUTION
(2) Figure 5 illustrates the guidelines for installation, routing and trapping of steam
runs and condensate returns.
(3) Table 6 indicates steam outlet size of humidifier and steam inlet size of distributors.
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Figure 1. Clearances and Operating Conditions
Figure 2. Mounting with Keyholes
Figure 3. Mounting with Mounting Bracket
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Figure 4. Drain Water and Supply Connection
Table 1. Maximum Recommended Length of Steam Line
Unit Size Steam Output Distance Possible Loss Steam Line Size
NH-005 5 lbs/hr 8 feet 1.0 lbs/hr 3/4
NH-010 10 lbs/hr 15 feet 1.5 lbs/hr 3/4
NH-020 20 lbs/hr 20 feet * 2.0 lbs/hr 3/4
NH-030 30 lbs/hr 25 feet * 2.5 lbs/hr 3/4
NH-050 50 lbs/hr 40 feet ** 4.0 lbs/hr 1 ½”
NH-075 75 lbs/hr 50 feet ** 5.0 to 10.0 lbs/hr 1 ½”
NH-100 100 lbs/hr 50 feet ** 5.0 to 10.0 lbs/hr 1 ½”
NH-150 150 lbs/hr 50ft/cylinder ** 5.0 to 10.0 lbs/hr 1 ½” cyl
NH-200 200 lbs/hr 50ft/cylinder ** 5.0 to 10.0 lbs/hr 1 ½” cyl
* Use one inch copper steam line for longer runs.
** Use two inch copper steam line for longer runs.
Notes: 1. This table gives the maximum recommended steam run by unit size.
2. The use of steam line other then copper, stainless steel tube or Nortec supplied steam line will void the
warranty and may adversely effect the operation of the humidifier
3. The NH-150 and NH-200 are dual units.
Table 2. Steam Line Materials
NORTEC Steam Line Copper Tube (Potable)
Stainless Steel Tube
(RO or DI)
Short Run < 10 feet (3m) yes yes yes
Long Run > 10 feet (3m) no yes yes
NOTE
Do not use plastic, steel, or black iron. Long runs affect accuracy of humidifier and its ability to quickly
respond to changes in demand when tight control is required.
Table 3. Recommended Materials and Sizes for Steam Runs
Unit Size
lbs/hr kg/hr ft m
Steam Run Steam Line Material Steam Line Description
0-30 0-13 0-10 0-3 Copper Tube 0.750 in MED-L Tubing (0.875 inch OD)
0-30 0-13 30+ 3+ Copper Tube 1.0 inch MED-L Tubing (1.125 inch OD)
0-30 0-13 0-10 0-3 Stainless Steel Tube 0.875 inch Tube x 0.049 inch thick
0-30 0-13 30+ 3+ Stainless Steel Tube 1.125 inch Tube x 0.049 inch thick
50-100 22-45 0-20 0-6 Copper Tube 1.500 in MED-L Tubing (1.625 inch OD)
50-100 22-45 20+ 6+ Copper Tube 2.0 inch MED-L Tubing (2.125 inch OD)
50-100 22-45 0-20 0-6 Stainless Steel Tube 1.750 inch Tube x 0.065 inch thick
50-100 22-45 20+ 6+ Stainless Steel Tube 2 inch Tube x 0.065 inch thick
NOTE
Options show in bold-italic font require that reducers be used at both ends. These extra large sizes are
to allow for better condensation removal in long steam runs. These sizes do not permit the use of hose
couplings to connect either humidifier or distributors.
Insulate steam lines with 1” pipe insulation.
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Figure 5. Steam Run and Condensate Return Installation Guidelines (Sheet 1 of 2)
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Figure 6. Steam Run and Condensate Return Installation Guidelines (Sheet 1 of 2)
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Table 4. Recommended Condensate Line at Distributor(s)
Dispersion Method Condensate Hose Copper Tube (Potable)
1 x Steam Distributor
0.375 inch
NORTEC 132-8840
0.375 inch
3 x Steam Distributor
NORTEC 132-8840
Note: *When using more then 1 steam distributor, the condensate line must be trapped before it is
joined together. See figure 4
0.250 inch. MED-L Tubing
(0.375 inch OD)
0.500 inch. MED-L Tubing
(0.875 inch OD)
Stainless Steel Tube
(RO or DI)
0.375 Tube 0.049 inch thick
0.650 Tube 0.049 inch thick
Table 5. Equivalent Lengths of Elbows and Tee Fittings
Nominal Tube
Diameter
0.750 / 0.875 in. 2 ft. 1 ft. 4 ft.
1.500 / 1.750 in. 3 ft. 6 in. 1ft. 9 in. 7 ft.
2.000 / 2.500 in. 4 ft. 6 in. 2 ft. 3 in. 10 ft.
Standard 90degree
Elbow
Standard 45 degree
Elbow Side Outlet Tee
Table 6. Humidifier and Distributor Inlet/Outlet Sizes
Humidifier Steam Outlet Distributor Steam Inlet
NH 5-30 0.875 in. OD ASD, BSD 0.875 inch OD
NH 50-100 1.75 in. OD CSD 1.75 inch OD
NH 150-200 Two 1.75 in. OD
SAM-e 1.75 inch OD*
mini SAM-e 0.875 or 1.75 inch OD**
NOTE: * SAM-e may have multiple 1.75 in. inlets depending on order.
** mini SAM-e inlet is determined on order and may have two 1.75 in. OD inlets.
Blower Pack
0.875 inch OD or
1.75 inch OD
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Figure 7. Primary Voltage Supply Wiring
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A
T
G. ELECTRICAL
(1) Primary Voltage Supply Wiring to Humidifier
(a) Local electrical codes should always be followed when installing a NORTEC
Humidifier. Direct wiring to the high voltage terminal is shown in Figure 7.
H. CONTROL WIRING
(1) Controls are available from NORTEC as accessories. If controls were not ordered
with humidifier, they must be purchased or supplied by others. The following
information is relevant to all controls, factory supplied or otherwise.
(a) On-Off Controls
CAUTION
REGARDLESS OF SELECTING ON/OFF OR MODULATING CONTROL
METHOD, NORTEC HUMIDIFIERS MUST HAVE A CLOSED CIR CUIT
CROSS ITS ON/OFF SECURITY LOOP CONTROL TERMINAL TO
OPERATE. NORTEC HIGHLY RECOMMENDS THE USE OF A HIGH
LIMIT HUMIDISTAT AND AN AIR PROVING SWITCH IN SERIES FOR
HIS FUNCTION.
The method and guidelines for installing on/off controls are displayed in
Figure 8. It can be combined with all control methods.
(b) Demand Signal Controls Installation
Figure 9 uses the Nortec optional Controllers to demonstrate the typical
demand signal installation.
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Figure 8.
On/Off Control Guidelines and Low Voltage Terminal Strip
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Figure 9. NORTEC Control Guidelines and Wiring (Optional)
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