NH
TM
Series
NHTC / NHPC
ELECTRODE
STEAM HUMIDIFIER
Installation Manual
2522381-C
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TABLE OF CONTENTS
Subject
Page
10-00 INTRODUCTION
1.
PREINSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
RECEIVING & UNPACKING EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PACKAGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
HUMIDIFIER AND CONTROLS BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DISTRIBUTOR BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
ACCESSORIES BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PREINSTALLATION EQUIPMENT VERIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
A.
2.
A.
B.
C.
D.
3.
A.
10-10 INSTALLATION PROCEDURES
1.
HUMIDIFIER INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
MOUNTING WITH KEYHOLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
MOUNTING WITH WALL BRACKET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
WATER SUPPLY LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
DRAIN LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
STEAM RUNS AND CONDENSATE RETURNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
ELECTRICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
CONTROL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
OPTIONAL OUTDOOR TEMPERATURE RESET FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
HUMIDITY TRANSDUCER SIGNAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
NETWORKING NHTCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
NORTEC ONLINE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
L.
10-20 OPERATION
1.
NHTC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
A.
B.
C.
D.
E.
F.
G.
H.
I.
NHTC COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
HUMIDIFIER START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
BASIC STEAM PRODUCTION METHOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
CYLINDER LIFE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
SOFTWARE INITIAL SELF-TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
SOFTWARE FLOW CHART WITH DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
SELF-HELP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
SYSTEM MESSAGES AND LIGHTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
DOUBLE UNIT OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
STEAM DISTRIBUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
STEAM DISTRIBUTOR OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
SAM-E OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
BLOWER PACK OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
CONTROLS AND REMOTE COMMUNICATION (OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
DIGITAL CONTROL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
DIGITAL TRANSDUCER OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
REMOTE CONNECTIONS (OPTIONAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
NORTEC LINKS OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
NORTEC ONLINE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
2.
3.
A.
B.
C.
A.
B.
C.
D.
E.
10-30 MAINTENANCE PROCEDURES
1.
NH ELECTRODE STEAM HUMIDIFIERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
WHEN TO REPLACE THE STEAM CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
EXTENDED SHUT-DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
COMPONENTS OF THE STEAM CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
A.
B.
C.
D.
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E.
F.
G.
HOW TO REMOVE THE STEAM CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
MANDATORY CLEANING OF THE DRAIN VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
HOW TO INSTALL THE REPLACEMENT CYLINDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
10-40 TROUBLESHOOTING
1.
TROUBLESHOOTING NH ELECTRODE STEAM HUMIDIFIERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
A.
B.
C.
PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
STARTING POINT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
NHTC/NHPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
TROUBLESHOOTING DISTRIBUTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
TROUBLESHOOTING ATMOSPHERIC DISTRIBUTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
SAM-E TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
BLOWER PACKS TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
DIGITAL ON/OFF HUMIDISTAT SENSOR CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
0-10V DIGITAL HUMIDISTAT SENSOR CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
2.
3.
4.
5.
6.
A.
A.
A.
A.
A.
10-50 TECHNICAL
1.
WIRING AND TERMINALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
A.
B.
HUMIDIFIER CONTROL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
NH WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
CHECK LISTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
PRE-NORTEC ONLINE START UP CHECKLIST WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
PRE-NORTEC LINKS START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
HUMIDIFIER MANDATORY PRE-START UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
HUMIDIFIER MANDATORY START-UP CHECKLIST AND QUICK REFERENCE . . . . . . . . . . . . . . . .73
PERIODIC MAINTENANCE CHECKLIST AND QUICK REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . .74
SPARE PARTS AND EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
ASD, BSD, CSD DISTRIBUTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
SAM-E SPARE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
NH SERIES HUMIDIFIER SPARE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
2.
A.
B.
C.
D.
E.
3.
A.
B.
C.
WARRANTY
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LIST OF FIGURES
Figure
Page
10-00 INTRODUCTION
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
NHTC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Humidifier Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Distributor Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SAM-e Distributor Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Remote Mounted Blower Pack Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Typical NHTC Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
10-10 INSTALLATION PROCEDURES
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Clearances and Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Mounting with Keyholes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Mounting with Mounting Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Drain Water and Supply Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Steam Run and Condensate Return Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Steam Run and Condensate Return Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Primary Voltage Supply Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
On-Off Control Guidelines and Low Voltage Terminal Strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
NORTEC Control Guidelines and Wiring (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Setpoint Versus Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
NORTEC Humidity Transducer Guidelines and Wiring (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . 24
Networking NHTCs (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
NORTEC OnLine Installation Guidelines (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10-20 OPERATION
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
NHTC Components (Front View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
NHTC Components (Side View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Humidifier Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Drain Rate Versus Water Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Capacity Setting and Cylinder Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Basic Steam Production Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Software Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Steam Distributor Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
SAM-e Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Blower Pack Operation and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
NORTEC Digital Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Difference from Setpoint in Relation to Demand Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Duct and Wall Mounted Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
10-30 MAINTENANCE PROCEDURES
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Cylinder Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Cylinder Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Drain Valve Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Cylinder Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
10-50 TECHNICAL
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
NHTC/NHPC Double Unit Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
NHTC/NHPC Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Distributor Exploded View and Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
SAM-e Exploded View and Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
NHTC/NHPC Plumbing Compartment Exploded View and Spare Parts . . . . . . . . . . . . . . . . . . . . . 77
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.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Maximum Recommended Length of Steam Runs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Steam Line Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Recommended Material and Size for Steam Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Recommended Condensate Line at Distributor(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Equivalent Length Elbow and T-Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Humidifier and Distributor Inlet/Outlet Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
10-20 OPERATION
Table 1.
Table 2.
Table 3.
Table 4.
NHTC / NHPC Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-30
Self-Test Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Signal Light Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Status Messages with LED State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
10-40 TROUBLESHOOTING
Table 1.
Table 2.
Table 3.
Table 4.
Troubleshooting Symptoms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Ensuring A Demand Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
NH System Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Term Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
10-50 TECHNICAL
Table 1.
Table 2.
Table 3.
Controller and Sensor Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
NHTC/NHPC Plumbing Part List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
NHTC/NHPC Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
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10-00
INTRODUCTION
10-00
Page 1
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Figure 1. NHTC
10-00
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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.
c.
For equipment received if a SAM-e distributor is ordered refer to Figure 4.
For equipment received if a RMBP is 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.
10-00
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HUMIDIFIER
BAG WITH
MANUAL,
CLAMPS,
HOSE SECTION
STEAM HOSE
SECTION (NOT
SUPPLIED IF BUILT
ON BLOWER PACK
ORDERED)
CONTROLS
(IF ORDERED
ONLY)
BOX WITH
ABBREVIATED
INSTRUCTIONS
AND BOX
CONTENT
STICKERS
Figure 2. Humidifier Box
Figure 3. Distributor Box
Figure 4. SAM-e Distributor Box
Figure 5. Remote Mounted Blower Pack Box
10-00
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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.
10-00
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Figure 6. Typical NHTC Installation (Sheet 1 of 2)
10-00
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Figure 7. Typical NHTC Installation (Sheet 2 of 2)
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10-00
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10-10
INSTALLATION
10-10
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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.
10-10
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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
CAUTION
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.
(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.
10-10
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Figure 1. Clearances and Operating Conditions
Figure 2. Mounting with Keyholes
Figure 3. Mounting with Mounting Bracket
10-10
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Figure 4. Drain Water and Supply Connection
10-10
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Table 1. Maximum Recommended Length of Steam Line
Unit Size
NH-005
NH-010
NH-020
NH-030
NH-050
NH-075
NH-100
NH-150
NH-200
Steam Output
5 lbs/hr
Distance
8 feet
Possible Loss
1.0 lbs/hr
Steam Line Size
3/4
3/4
10 lbs/hr
20 lbs/hr
30 lbs/hr
50 lbs/hr
75 lbs/hr
15 feet
1.5 lbs/hr
20 feet *
25 feet *
40 feet **
50 feet **
50 feet **
2.0 lbs/hr
3/4
2.5 lbs/hr
3/4
4.0 lbs/hr
1 ½”
1 ½”
1 ½”
1 ½” cyl
1 ½” cyl
5.0 to 10.0 lbs/hr
5.0 to 10.0 lbs/hr
100 lbs/hr
150 lbs/hr
200 lbs/hr
50ft/cylinder ** 5.0 to 10.0 lbs/hr
50ft/cylinder ** 5.0 to 10.0 lbs/hr
* 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
Stainless Steel Tube
NORTEC Steam Line Copper Tube (Potable)
(RO or DI)
Short Run < 10 feet (3m)
Long Run > 10 feet (3m)
yes
no
yes
yes
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
0-13 0-10 0-3
0-13 30+ 3+
0-13 0-10 0-3
0-13 30+ 3+
Steam Run
Steam Line Material
Steam Line Description
ft
m
0-30
0-30
0-30
0-30
Copper Tube
Copper Tube
0.750 in MED-L Tubing (0.875 inch OD)
1.0 inch MED-L Tubing (1.125 inch OD)
0.875 inch Tube x 0.049 inch thick
1.125 inch Tube x 0.049 inch thick
1.500 in MED-L Tubing (1.625 inch OD)
2.0 inch MED-L Tubing (2.125 inch OD)
1.750 inch Tube x 0.065 inch thick
2 inch Tube x 0.065 inch thick
Stainless Steel Tube
Stainless Steel Tube
Copper Tube
50-100 22-45 0-20 0-6
50-100 22-45 20+ 6+
50-100 22-45 0-20 0-6
50-100 22-45 20+ 6+
Copper Tube
Stainless Steel Tube
Stainless Steel Tube
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.
10-10
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Figure 5. Steam Run and Condensate Return Installation Guidelines (Sheet 1 of 2)
10-10
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Figure 6. Steam Run and Condensate Return Installation Guidelines (Sheet 1 of 2)
10-10
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Table 4. Recommended Condensate Line at Distributor(s)
Stainless Steel Tube
(RO or DI)
Dispersion Method
Condensate Hose
Copper Tube (Potable)
0.375 inch
NORTEC 132-8840
0.375 inch
0.250 inch. MED-L Tubing
(0.375 inch OD)
1 x Steam Distributor
0.375 Tube 0.049 inch thick
0.650 Tube 0.049 inch thick
0.500 inch. MED-L Tubing
(0.875 inch OD)
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
Table 5. Equivalent Lengths of Elbows and Tee Fittings
Nominal Tube
Diameter
Standard 90degree
Elbow
Standard 45 degree
Elbow
Side Outlet Tee
0.750 / 0.875 in.
1.500 / 1.750 in.
2.000 / 2.500 in.
2 ft.
1 ft.
4 ft.
7 ft.
3 ft. 6 in.
4 ft. 6 in.
1ft. 9 in.
2 ft. 3 in.
10 ft.
Table 6. Humidifier and Distributor Inlet/Outlet Sizes
Humidifier
NH 5-30
Steam Outlet
0.875 in. OD
1.75 in. OD
Distributor
ASD, BSD
CSD
Steam Inlet
0.875 inch OD
1.75 inch OD
NH 50-100
0.875 inch OD or
1.75 inch OD
Blower Pack
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.
10-10
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Figure 7. Primary Voltage Supply Wiring
10-10
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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.
CAUTION
REGARDLESS OF SELECTING ON/OFF OR MODULATING CONTROL
METHOD, NORTEC HUMIDIFIERS MUST HAVE A CLOSED CIRCUIT
ACROSS 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
THIS FUNCTION.
(a) On-Off Controls
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.
10-10
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Figure 8. On/Off Control Guidelines and Low Voltage Terminal Strip
10-10
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Figure 9. NORTEC Control Guidelines and Wiring (Optional)
10-10
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I. OPTIONAL OUTDOOR TEMPERATURE RESET FUNCTION
NOTE
Order outdoor temperature sensor separately, Part #252-0263.
(1) Each humidistat and controller is equipped with an integrated reset function that
will limit the setpoint during cold weather operation. This will prevent condensation
on windows and building structures. Figure 10 illustrates how the setpoint reset
feature operates.
(2) This feature is enabled by removing the jumper from terminals 8 and 1 on the
humidistat and wiring the outdoor temperature sensor to these terminals.
(3) When the outdoor temperature setback feature is in effect, the humidistat will
normally display the calculated setpoint limit based on the outdoor air temperature.
A snowflake will also be displayed to indicate cold weather operation. When any
key on the controller is pressed, the LCD screen will display the customer specified
setpoint for a short duration.
Figure 10. Setpoint Versus Outdoor Temperature
10-10
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J. HUMIDITY TRANSDUCER SIGNAL INSTALLATION
(1) Figure 11 displays the NORTEC optional humidity transducer installation.
K. NETWORKING NHTC
(1) The wiring of master/slave networks are explained in Figure 12. It allows operation
of multiple NHTCs with one control signal.
L. NORTEC ONLINE INSTALLATION
(1) An abbreviated recommended installation of NORTEC OnLine and its components
are shown in Figure 13.
10-10
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Figure 11. NORTEC Humidity Transducer Guidelines and Wiring (Optional)
10-10
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Figure 12. Networking NHTCs (Optional)
10-10
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Figure 13. NORTEC OnLine Installation Guidelines (Optional)
10-10
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10-20
OPERATION
10-20
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1. NHTC
A. NHTC COMPONENTS
(1) Refer to Figures 1 and 2 when reading Table 1.
B. HUMIDIFIER START-UP
(1) Figure 3 describes the method for powering up a humidifier and the cautions to take.
C. BASIC STEAM PRODUCTION METHOD
(1) Figure 6 describes the method the NH Series humidifier uses to produce pure clean
steam. The NORTEC NH electrode steam humidifier uses NORTEC’s patented Auto-
Adaptive cycle to calculate drains to maintain optimal performance. Figure 4 Drain Rate
vs Water Conductivity depicts an indication of drain amounts.
D. CYLINDER LIFE
(1) The output of all NH Series humidifiers is pure, clean steam; minerals originally in the
incoming water are left behind. These minerals will eventually coat the cylinder
electrodes. Therefore, the mineral content of the incoming water, the unit running time
and output capacity setting ultimately determine cylinder life. NORTEC’s cylinder life is
up to 2,000 hours of operation. Water chemistry and capacity can affect cylinder life.
(See Figure 5.) See Table 4 to identify the message which indicates when the cylinder
is at the end of its life.
Figure 1. NHTC Components (Front View)
Figure 2. NHTC Components (Side View)
10-20
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Table 1. NHTC/NHPC Components
Item Number
Component Name
Steam Connector
Description
1
Used to allow easy replacement of cylinders without disconnecting
the steam line.
2
3
Condensate Return
Fill Cup
This inlet is to return condensate to the unit.
The fill cup allows isolation from the fill line by supplying an air gap.
It will also overflow any water that cannot enter the cylinder to drain.
4
5
Float Chamber (Optional)
Manual Drain Button
Detection OPTION – Used with the advanced foam detection
setting.
By pushing this button, manual drain is initiated with software
support. Software support supplies drain cooling if enabled and will
disable manual drain after 10 minutes.
6
Door Interlock
The door interlock prevents the unit from running when the front
door is off. For startup and troubleshooting, pulling this interlock will
overide this safety feature.
7
8
Back-up Drain
Fill Valve
Back-up drain switch allows the draining of the cylinder without
electronic support.
The fill valve allows water to flow up to the fill cup. In units with
Drain Water Cooling to 120 degrees option, this valve is a dual
valve. The second valve is wired in parrallel with the drain valve to
quench the water with fresh cold water everytime the drain is
activated.
9
Drain Canal
Drain Valve
The drain canal allows all drainable water to accumulate into one
location to then be drained away.
10
Drain valve when energized will allow water to flow down to the
drain canal. When not energized, water flowing from the fill cup will
flow up into the cylinder.
11
12
Transformer
The transformer converts the primary supply voltage to the required
24 VAC to the unit electronics. It is protected by a fuse to ensure
that the 24 VAC electronics are protected from surges or shorts.
On/Off Switch
Turns the unit power on and off. Be aware that high voltage will still
enter the unit even though the 24VAC electronic are disabled. The
contactor will not be energized. Main shut-off should be open before
any servicing is performed.
13
14
Graphical Display and Menu
Buttons
The graphical display and buttons are used to navigate through the
software. Use software flowchart as a reference.
Remote Relay Board (Optional)
The remote relay board is a set of 4 dry contacts, rated for 24 VAC
1A, which activate in conjunction with humidifier on, steam
production, service and error conditions.
15
NORTEC Cylinder
The NORTEC disposable cylinder contains electrodes that become
energized when the contactor is closed. This allows current to pass
through the water from one electrode to another, generating heat
within the water. The water then boils and the output is clean pure
steam.
10-20
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Table 1. NHTC/NHPC Components (cont)
Item Number
Component Name
Cylinder Plug
Description
17
Cylinder plugs are press fit on cylinder electrode pins. These color
coded connections should fit snuggly, on same color pins. Replace
if loose or frayed.
18
19
Low Voltage Terminal Strip
Driver Board
The low voltage terminal strip is the location at which all controls are
connected. See Installation for details.
The driver board(s) is the housing of all fuses and relays. It is
connected to the total controller, and monitor and activate all
humidifier states.
20
21
Contactor
The contactor(s) when energized allow main power to energize the
cylinder electrodes, allowing current to pass, boiling the water.
NORTEC OnLine Module
(Optional)
NORTEC ONLINE OPTION NHTC ONLY. This module allows the
NHTC to be connected to the internet and communicate information
to NORTEC via the internet. See NORTEC OnLine operation for
details. NHTC only
22
23
Links Module
(Optional)
NORTEC LINKS OPTION NHTC ONLY This module allows the
NHTC to communicate with a BMS system using the
communication protocol requested at order. See NORTEC Links
operation for details. NHTC only
Network Terminal Strip
The network terminal strip allows up to 13 NHTC units to be
connected on one Links module and eight OnLine modules. See
Installation of NORTEC Links and OnLine for details on wiring
humidifier networks.
24
25
26
Fuse Holder
OPTIONAL FUSE PACKAGE provides protection of individual high
voltage lines in the humidifier and does not replace fuse and
external disconnect.
High Voltage Terminal Strip
Total Controller
Connection point of main power lines to the humidifier from the
underside of the strip. It is accompanied by a ground terminal which
grounds the cabinet.
The total controller board (hidden in this view) is part of the
graphical display. It is the microcomputer that sends and collects
information from the driver boards, network modules and any other
humidifier connected to it.
10-20
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Figure 3. Humidifier Start-Up
Figure 4. Drain Rate Versus Water
Conductivity
Figure 5. Capacity Setting and Cylinder Life
10-20
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Figure 6. Basic Steam Production Method
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E. SOFTWARE INITIAL SELF-TEST
Table 2. Self-Test Messages
Graphic Display
NHTC START-UP:
INIT CYLINDER
Explanation/Comments (What You Read)
The unit is beginning its bootup routine, along with powering up the EEPROM on the
SMART Cylinder
NHTC START-UP:
READING CYLINDER DATA
The unit reads the type of cylinder to provide maximum control of operation. If it
unable to do so it will skip the rest of the self-test and fault out.
SELF TEST CYLINDER
Inlet Valve
Unit energizes the fill valve for 1 second.
ESC
SELF TEST CYLINDER
Drain Valve
Unit energizes the drain valve for 2 seconds.
ESC
SELF TEST CYLINDER
Heat Cont.
Unit closes the contactor for 2 seconds.
ESC
SELF TEST CYLINDER
Unit activates the pump (if present) for 2 seconds.
Pump
ESC
SELF TEST CYLINDER
Bleed Valve
ESC
Unit activates the bleed valve (if present) for 2 seconds.
Unit activates the steam relay for remote fault indication package and green light.
Unit activates the service relay for remote fault indication package and yellow light.
Unit activates the error relay for remote fault indication package and red light.
Unit activates the unit on relay.
SELF TEST REMOTE
Steam Relay
ESC
SELF TEST REMOTE
Service Relay
ESC
SELF TEST REMOTE
Error Relay
ESC
SELF TEST REMOTE
Oper. Relay
ESC
F. SOFTWARE FLOW CHART WITH DEFINITIONS
(1) The flow chart in Figure 7 depicts the software logic and definitions.
G. SELF-HELP
(1) The microcomputer applies corrective actions whenever its self-diagnostics identifies a
problem that it is able to correct by itself. If the corrective action is not successful then
it displays a system message. If the corrective action requires a service person, then
the microcomputer’s only resort is to stop the unit and display a system message. The
unit never stops unless it has to.
(2) After three days of no call from either the on/off controls or the modulating controls,
when active, the three-day drain active feature is automatically activated long enough
to drain all water from the steam cylinder. This NORTEC feature will prolong the life of
the cylinder. (User selectable, default is ON.)
10-20
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Figure 7. Software Flow Chart (Sheet 1 of 7)
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Figure 7. Software Flow Chart (Sheet 2 of 7)
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Figure 7. Software Flow Chart (Sheet 3 of 7)
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Figure 7. Software Flow Chart (Sheet 4 of 7)
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Figure 7. Software Flow Chart (Sheet 5 of 7)
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Figure 7. Software Flow Chart (Sheet 6 of 7)
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Figure 7. Software Flow Chart (Sheet 7 of 7)
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H. SYSTEM MESSAGES AND LIGHTS
(1) Table 3 describes general signal light status meanings.
Table 3. Signal Light Status
Yellow
Green
Red
OFF
OFF
OFF
Unit is on standby or humidifier has just been energized but has not sensed
production of steam yet.
OFF
ON
ON
OFF
OFF
Humidifier senses production of steam.
OFF
An attention state exists that should not prevent the unit from producing steam
when the controls call for it. Check the message on the screen to try to correct it.
ON
ON
OFF
Prepare to replace cylinder or normal startup operation. May also indicate an
attention during operation. Check the message on the screen to try to correct it.
BLINK
OFF
OFF
BLINK
OFF
OFF
OFF
ON
Manual Drain On with software drain switch.
Unit sees a demand, but safeties are open.
Operation fault (unit will not run).
OFF
(2) Table 4 describes common status messages and the lights displayed for each and their
meaning. For a list of warnings and faults, see Chapter 10-40 Troubleshooting.
I. DOUBLE UNIT OPERATION
(1) The unit will report only one cylinder at a time if the unit was ordered without coupled
circuits. You will notice on the screen the indication of which cylinder you are
monitoring and in the lower right the option to monitor the alternate cylinder.
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Table 4. Status Messages with LED State
NHTC Display Message
LED state
None
System Action
Unit is made idle.
Idle
Humidifying
GRN (after steam The unit has closed the contactor and is sending
production starts) current to the cylinder to humidify.
MANUAL DRAIN: ON
SAFETY LOOP; OPEN
YEL (blink)
The drain valve is activated.
Steam production stopped.
GRN
(blink)
LEVEL SENSOR; ON
None
Deactivates the fill valve to prevent overfilling.
KEEP WARM ACTIVATED
W19: Cylinder spent
None
Keep Warm feature activated, it has closed the
contactor to warm the water.
YEL, GRN
YEL, RED
None
The electronics allow the cylinder to be reset up
to four times before locking out the humidifier.
E19: Cylinder spent
Humidifier interrupts operation and the fault relay
is activated.
FOAM: FULL TANK FLUSHING
The unit will initiate a flush of the cylinder and
resume operation.
10-20
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Symptom Diagnosed
Probable Cause
Corrective Action
Normal Operation
Unit is awaiting a demand or
control signal.
This is normal when there is no need for
humidity. If you believe there is a need for
humidity, and the unit should not be idle,
refer to troubleshooting
The unit is now boiling water in This is normal when there is a need for
Normal Operation
the cylinder and filling as
necessary.
humidity. If you believe there is no need for
humidity, and the unit should idle, refer to
troubleshooting
This is not a fault or warning. It
is an indication that the manual
drain switch has been activated.
Manual drain switch has been activated.
Press Manual Drain button again to
stop the drain action.
Safety loop circuit (terminal 1
and 2) is open.
One or more of the safety devices is open
as the result of a device failure, improper
Determine which device is preventing
continuity of the safety loop circuit, and
installation or an unsafe condition has been verify that it is functioning properly and
detected.
is properly installed and calibrated.
Water has reached the top of
the cylinder and has activated
the high water sensor. This is
not an error or fault, but is
normal on start-up and at the
end of a cylinder life span.
1. Normal on start-up with a new cylinder
or a cylinder that has been completely
drained because of an extended off
period. This condition can last several
If foaming is determined to be the
cause of the high water indication,
consult your local representative about
possible adjustment and/or a foam
hours until the water in the cylinder has detection kit. If not foaming, consider it
concentrated or the electrodes can no
longer provide rated capacity or
adjusted capacity. Water level
normal operation unless water level is
not at the top of the cylinder.
automatically rises to meet the demand.
2. Foaming can also cause an invalid high
water indication.
Keep Warm feature is enabled
Unit is entering the Keep Warm cycle. The Normal for unit with Keep Warm setting
and proceeding to a Keep Warm unit has been inactive for a given period
activated.
Cycle.
and is keeping the water warm.
Electronics have determined
cylinder is spent. Within the next same type and model.
72 hours the humidifier will stop.
The cylinder must be replaced with the
When ordering a new cylinder, quote
the model number presently installed in
the humidifier.
Electronics have determined
that the cylinder is spent.
The cylinder must be replaced with the
same type and model.
When ordering a new cylinder, quote
the model number presently installed in
the humidifier.
The electronics has detected
foaming within the cylinder (only within the cylinder.
for units with the optional Foam
The unit has detected a foaming condition
The unit will initiate corrective action on
its own.
Detection Package).
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2. STEAM DISTRIBUTION
A. STEAM DISTRIBUTOR OPERATION
(1) Figure 8 describes the method by which the steam distributor releases pure clean
steam into the duct while collecting condensate and removing it by the condensate
return.
B. SAM-e OPERATION
(1) Figure 9 describes the method by which the Short Absorption Manifold releases pure
clean steam into the duct while collecting condensate, removing it by condensate
return and ensuring short absorption distance.
C. BLOWER PACK OPERATION
WARNING
DURING AND FOLLOWING OPERATION OF THE HUMIDIFIER, THE
STEAM AND COMPONENTS IN CONTACT WITH THE STEAM ON THE
BLOWER PACK CAN BECOME HOT AND CAN BURN IF TOUCHED.
(1) Figure 10 describes the method by which the blower pack distributes the pure clean
steam directly into the space required. It also describes the adjustments that can be
made to conform to the specific situation.
Figure 8. Steam Distributor Operation
10-20
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Figure 9. SAM-e Operation
Figure 10. Blower Pack Operation and Adjustments
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3. CONTROLS AND REMOTE COMMUNICATION (OPTIONAL)
A. DIGITAL CONTROL OPERATION
(1) Figure 11 shows the components of the NORTEC Controller and how to adjust the
setpoint.
(2) In the case of a modulating NORTEC Controller, Figure 12 shows the relation between
the difference from setpoint to %rh in the room and the 0-10 V DC demand signal sent
out. From this basis the NORTEC Controller uses its PI algorithm to adjust its demand
signal in accordance with the history of the environment. This type of control allows for
tighter and more precise control.
B. DIGITAL TRANSDUCER OPERATION
(1) The NORTEC digital transducers, shown in Figure 13, are designed to sense humidity
in duct or in room respectively, and report it back to a controller or the NHTC directly.
Required humidifier output is determined by controller or humidifier.
C. REMOTE CONNECTIONS (OPTIONAL)
CAUTION
NORTEC DOES NOT RECOMMEND USING THE DRY RELAY
CONTACTS WITH ANYTHING MORE THAN 24 VAC, 1 AMP.
(1) The NHTC reports the signal light status, in Table 3, by closing the supplied dry contact
relays which can be wired back to a BMS or monitoring station. This method of
monitoring is not as informative as the actual display, but alerts you to the general
status of the unit.
Figure 11. NORTEC Digital Controller
10-20
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D. NORTEC LINKS 2 OPERATION
(1) NORTEC LINKS 2 is an option that can be integrated with the NHTC. This allows a
BMS to monitor and in the right configuration, control the humidifier. For additional
information about NORTEC Links and its operation and configuration, go to
www.humidity.com and look up the NORTEC LINKS 2 manual.
(2) Table 5 contains a list of NORTEC LINKS 2 variable definitions. For a complete list,
contact the factory.
E. NORTEC ONLINE OPERATION
(1) NORTEC OnLine is an option that can be integrated with the NHTC. This allows a user
their unit from any computer with an internet connection. (See Figure 14)
(2) After initially logging into the NORTEC OnLine server the user will be presented with a
list of humidifiers currently registered with the Server program. Each humidifier will be
listed with a unit type identifier, a serial number and an address descriptor.
(3) By clicking on the humidifier name, the user will then be brought to a status screen with
an image of the selected humidifier.
(4) Figure 14 shows a typical NORTEC OnLine Monitoring Screen. Use this manual in
combination with NORTEC OnLine to be able to monitor and understand the settings
possible through the NORTEC OnLine Interface.
Figure 12. Difference from Setpoint in
Relation to Demand Signal
Figure 13. Duct and Wall Mounted
Transducer
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THIS PAGE INTENTIONALLY LEFT BLANK
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10-30
MAINTENANCE
PROCEDURES
10-30
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MAINTENANCE PROCEDURES
1. NH ELECTRODE STEAM HUMIDIFIERS
Typical tools required for any maintenance procedure:
- Slotted Screwdriver
- Small Slotted Screwdriver
- Phillips Screwdriver
- Needle-Nose Pliers
- Wrench
A. MAINTENANCE
WARNING
DISCONNECT MAIN POWER BEFORE ANY SERVICING.
WARNING
THE PLUMBING AND ELECTRICAL COMPARTMENTS CONTAIN HIGH
VOLTAGE COMPONENTS AND WIRING. ACCESS SHOULD BE
LIMITED TO AUTHORIZED PERSONNEL ONLY.
(1) The NHTC and its components are a very low maintenance system. The only
maintenance normally required is to change the cylinder, clean out the drain valve
assembly, clean out the inlet valve screen and know the procedure for extended shut-
down and start-up.
B. WHEN TO REPLACE THE STEAM CYLINDER
(1) The steam cylinder is disposable and must be replaced at end of cylinder life. Cylinder
life is dependent on water supply conditions and humidifier usage. Failure to replace
the cylinder at the end of cylinder life will cause the unit to lock out. NORTEC is not
responsible for any damages resulting from, or attributed to, the failure to replace a
spent cylinder (see Manufacturer’s Warranty). There are many indications, each of
which signifies the end of cylinder life. See 10-20 Operation, Table 4, for details on how
the unit functions and determines end of cylinder life.
C. EXTENDED SHUT-DOWN
(1) As long as the NHTC is powered, it will automatically drain the cylinder when there has
not been a call for humidity for an extended period of time. This feature will reduce or
prevent the possibility of corrosion of the electrodes and the accumulation of algae and
bacteria growing in the cylinder. The cylinder will remain empty until there is a call for
humidity at which time the fill valve will open and refill the cylinder. The unit will go
through its normal process for optimum operation.
(2) Should it be required to disconnect power to the humidifier for a period of extended
shut-down, always drain the cylinder first. Leave the switch in the OFF position and
‘open’ the main external fused disconnect to stop power to the humidifier. Close the
shut-off valve in the water supply line feeding the humidifier.
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D. COMPONENTS OF THE STEAM CYLINDER
(1) Consult Figure 1 for NORTEC cylinder components.
Figure 1. Cylinder Components
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E. HOW TO REMOVE THE STEAM CYLINDER
(1) Consult Figure 2 for removal of the steam cylinder.
Figure 2. Cylinder Removal Procedure
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F. MANDATORY CLEANING OF THE DRAIN VALVE
(1) Always clean the drain valve before installing a new cylinder since the valve port may
be as dirty as the used cylinder. Figure 3 describes the process of removing and
cleaning the drain valve. Perform paragraph E. before proceeding.
Figure 3. Drain Valve Maintenance
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G. HOW TO INSTALL THE REPLACEMENT CYLINDER
(1) Consult Figure 4 to install the replacement cylinder.
Figure 4. Cylinder Replacement Procedure
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10-40
TROUBLESHOOTING
10-40
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1. TROUBLESHOOTING NH ELECTRODE STEAM HUMIDIFIERS
A. PREPARATION
(1) Ensure the installation detail conform to installation requirements.
(2) Understanding the Principle of Operation and the software menus is an asset when
troubleshooting. This information is found in chapter 10-20 Operation and can be
elaborated on by your local representative.
(3) When contacting your local representative or NORTEC for troubleshooting assistance,
please ensure the serial number has been obtained for reference purposes.
(4) Whenever the troubleshooting steps indicate a problem with the main pc-board, first
check all connections at the main PCB (including the ribbon cable connections at the
center of the main PCB) before ordering replacements.
B. STARTING POINT
(1) Table 1 checkpoints will allow for faster troubleshooting. Ensuring that all these steps
are taken is good practice when beginning to troubleshoot the NH series humidifier.
Check your symptom and verify all points before ordering any replacement parts or
contacting your local representative. Use the wiring diagram when necessary for
clarification.
NOTE
Wiring diagrams on unit supersedes diagrams in this manual.
WARNING
BE AWARE, WHEN TROUBLESHOOTING, THAT THE HUMIDIFIER IS
POWERED BY HIGH VOLTAGE AND FAMILIARITY WITH BOTH GOOD
PRACTICES AND WIRING OF THE HUMIDIFIER IS RECOMMENDED.
ANY TROUBLESHOOTING THAT REQUIRES OPENING THE CABINET
SHOULD BE DONE BY QUALIFIED PERSONNEL.
C. NHTC/NHPC
(1) The self-diagnostic system built into the NHTC is continually checking the status of the
electrical circuits to the fill valve, drain valve, primary voltage contactor, high water
sensor and steam cylinder. The modulating signals from external humidistat and
reduced manual capacity settings are taken into consideration. When problem
symptoms are found, the NHTC/NHPC will take self-corrective actions, if applicable. It
will, if necessary, respond by shutting itself down. Table 3 describes some of the
conditions the NH unit can detect and warn or protect itself against. Table 4 contains a
definition of the terms used in this section.
10-40
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Table 1. Troubleshooting Symptoms
System
What to Check
Why
Nothing is happening when the Main power is on and matches the
No, or improper voltage can cause the
on/off switch is turned on
specified voltage on the specification label. electronics or components not to respond.
24 VAC output from the step-down
transformer. Check high and low voltage.
24 VAC is required to power nearly all the
components of the humidifier, including the
electronics.
Ensure that fuses in the humidifier and on The fuses are in place to prevent damage
the electronic boards are good. Ensure
that 24 VAC is getting to the main board.
to the electronics. If there was a surge the
fuse may have blown to prevent damage
to the unit.
Door interlock open.
The door interlock has malfunctioned.
The unit will not fill or fills very
slowly (less then 1” per minute) between 30 to 80 psig
Water supply is on and water pressure is
The proper water volume and pressure
must be available as the valves in the NH
unit rely on its pressure to control volume
and operation. NORTEC recommends 55
to 60 PSIG.
Unit is getting a demand signal or the unit The unit will not activate the fill valve
is producing the required steam capacity.
See ensuring demand Table 2.
without a demand for humidity. It will also
only fill as necessary once there is a
demand. Once it reaches the requested
demand, it will stop filling.
No leak at drain valve or around cylinder.
Check for water coming out of the drain.
Check the fill valve inlet.
The cylinder is held in by gravity and
sealed by an O-ring. If not properly seated,
it could leak and prevent the unit from
filling.
Check fill valve strainer.
Check optional inline filter.
Drain stuck open
Pressure in the steam line could also
prevent filling causing the water in the fill
cup to overflow to drain.
Strainer is clogged.
Fill valve may also be restricted after
capturing debris in its filter.
Unit will not humidify or is not
reaching requested capacity.
Unit is getting a demand signal. Refer to
Table 2.
Unit will not send power to the cylinder
without a demand and safeties met.
Capacity is manually limited.
The unit will not surpass the capacity
dictated by the user in the software.
Cylinder is full.
The unit will not fill further than a full
cylinder. Operation requires it to try to
concentrate the conductivity, which may
take several hours, before it reaches full
capacity.
Unit has faulted or has a
warning
Check Table 3, Faults and Warning Codes Each code is identified and each has
individual causes and solutions.
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Table 2. Ensuring A Demand Signal
Check
Why and How
Safety Loop (terminal 1
and 2) is closed
The safety loop is checked to ensure that it is safe to operate. Checking to see 24 VAC from
terminal 1 to ground, and terminal 2 to ground should indicate whether is closed.
If found to be open, isolate which component in the safety loop is open to solve the issue. If
suspect, confirm that it is connected and operating properly.
Channel 1 has a signal.
Whether for on/off or modulating, a voltage potential signal must be present between
terminal 3 and 4 for the humidifier temperature.
If on/off there should be 5 VDC.
If VDC modulating, at least 25% of total possible signal must be present.
If mA controlled, at least 25% of total possible signal must be present.
If Transducer signals, the unit setpoint must be higher then the sensed room RH signal.
Only applicable if configured to accept dual channel input.
Channel 2 has a signal
If VDC modulating, at least 25% of total possible signal must be present.
If mA controlled, at least 25% of total possible signal must be present.
If Transducer signals, the high limit setpoint must be higher than the sensed RH signal.
2. TROUBLESHOOTING DISTRIBUTORS
CAUTION
KEEP IN MIND WHEN TROUBLESHOOTING DISTRIBUTORS THAT
THEY ARE BEING USED WITH STEAM AND THEREFORE, ARE AND
CAN REMAIN VERY HOT DURING THE TROUBLESHOOTING
PROCESS.
A. TROUBLESHOOTING ATMOSPHERIC DISTRIBUTORS
(1) If the distributor is spitting out water, ensure that the distributor is installed level and
check the condensate return for proper slope, check head above the trap, and check
the trap that it is clear of obstructions.
(2) If the distributor is condensing inside the duct, make sure the installation clearances
are as indicated in Chapter 10-10 Installation, and make sure that the design conditions
have not changed. If over humidification of the duct results, check controls and safeties
(ensure safeties are properly installed and functioning).
3. SAM-e TROUBLESHOOTING
A. PROCEDURE
(1) If the SAM-e is spitting out water, ensure that the distributor is installed per instructions
in Chapter 10-10 Installation and check the condensate return for proper slope and trap
and that it is clear of obstructions. The condensate return must be the lowest point of
the SAM-e header.
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(2) If the SAM-e is condensing inside the duct, make sure that the design conditions have
not changed.
(3) If grommets leak, make sure the tubes are firmly inserted, if cracks or damage are
found, replace grommet.
4. BLOWER PACKS TROUBLESHOOTING
A. PROCEDURE
(1) An optional blower pack (BP), ensure power supplied to blower pack either from
humidifier or other source, if present, gets its primary voltage from inside the humidifier.
This way, only one external power source has to be connected to the equipment.
Confirm this power source before troubleshooting the blower pack.
(2) Ensure blower pack is installed per Chapter 10-10 Installation.
(3) If fans are not functioning, confirm safety is not open. Fans are only ON when steam is
being discharged.
5. DIGITAL ON/OFF HUMIDISTAT SENSOR CALIBRATION
A. PROCEDURE
(1) The humidity sensor is factory calibrated, however, it can be field recalibrated.
(a) The calibration routine can be accessed by pressing and holding down the option
button for five seconds. A new screen will appear with the calibration adjustments.
(b) Press the up
or down
buttons until the text calH appears on the LCD screen.
button. The screen should load to
(c) To adjust the calibration press the Option
display the current calibration trim. The calibration trim can be adjusted by
pressing the up or down buttons to the desired level and then pressing the option
button to confirm the settings.
(d) Press the Power
button to return to the normal display.
NOTE
A properly calibrated hygrometer should be used in conjunction with any calibration
procedure.
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Table 3. NH System Messages
NHTC Display Message
LED state
System Action
Symptom Diagnosed
E5: Cylinder B Controller
missing
RED
RED
RED
GRN
Humidifier is in standby until
problem corrected.
On power up, the controller cannot
detect the driver board for cylinder B.
E6: Extendet Missing
E7: CPU CRC fault
Humidifier activates its fault
relay and interrupts its operation with the master unit. Master unit
until communication is fixed.
The slave unit is not in communication
powered?
Humidifier activates its fault
relay and interrupts operation.
Problem with the processor hardware
or software.
W11: Safety Loop Open
W12: Cylinder Max Level
Humidifier goes on standby.
Fill valve interrupted.
ON/OFF controls wired between
terminal 1 and 2 are open.
NONE
RED
Water at top of cylinder.
E12: Cylinder max Level no
current
Humidifier activates its fault
relay and interrupts its
operation.
The high water sensor is activated but
no current is measured in cylinder.
W13: Fill Timeout
E13: Fill: Timeout
W15: Over current
E15: Over Current
GRN
blink
The humidifier will attempt to
clear any debris by pulsing the
drain valve.
The fill valve has been activated for an
extended period of time but water has
not reached the sensor.
RED
YEL
RED
The fill valve has been activated Humidifier stops operation and the
for an extended period of time
but has not reached the sensor.
fault relay is activated.
The drain is activated to
decrease the water level in the
cylinder.
Measured current in the cylinder has
exceeded 115% of rated output.
Humidifier interrupts operation
and the fault relay is activated.
Measured current in the cylinder has
exceeded 115% of rated output.
W16: Excess Current
E16: Excess Current
YEL
Humidifier interrupts operation
and the fault relay is activated.
Measured current in the cylinder has
exceeded 115% of rated output.
RED
Humidifier interrupts operation
and the fault relay is activated.
Measured current in the cylinder has
exceeded 130% of rated output.
10-40
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Probable Cause
1. The driver board is damaged.
Corrective Action
1. Replace the driver board.
2. Controller is not configured correctly.
2. Verify that the humidifier is a double unit.
3. Check that the driver board ribbon cable is connected
to the main board.
1. The master unit is not configured correctly.
2. Is the RJ12 cable damaged?
1. Verify configuration settings for the units.
2. Replace the RJ12 cable.
3. Is an incorrect RJ12 cable used?
3. Replace with correct cable.
4. J2 ports on driver boards are not connected.
4. Check all connections to the processor board.
The electronics of the main PCB have diagnosed the main Reset humidifier and monitor display. If Error reoccurs
PCB (itself) as defective.
within one minute of resetting the unit, the problem is with
the main PCB. If the Error is not repeated, the primary
power to the unit is suspect.
1. Current measurement core loose on driver board?
2. Primary wire not looped through CT core?
3. High water sensor plug is on an electrode pin.
1. Connect CT core.
2. Interrupt main power and rewire CT core.
3. Install high water plug on shrouded pin.
1. Is the drain stuck open?
2. Check system backpressure.
3. Is the water supply closed?
4. Drain leaking?
1. Clean drain valve or replace.
2. Install fill cup extension kit if required.
3. Open water supply.
4. Clean drain valve.
1. Is the water supply closed?
2. Is the drain leaking?
1. Open water supply.
2. Clean drain valve.
3. Check the system backpressure.
3. Clean drain valve or replace.
4. Install fill cup extension kit if required.
1. Is the drain blocked?
1. Clean the drain line.
2. Is the cylinder filling too fast?
3. Was the wrong fill valve supplied?
4. Is there scale in the cylinder?
5. Is the water too conductive?
6. Is the wrong cylinder supplied?
7. Is the cylinder spent?
2. Replace the fill valve.
3. Replace the fill valve.
4. Rinse the cylinder.
5. Change water supply.
6. Install the correct type of cylinder.
7. Replace the cylinder.
1. Is the drain blocked?
2. Is the drain restricted?
1. Clean the drain line.
2. Clean the drain line.
3. Replace the fill valve.
4. Replace the fill valve.
5. Rinse the cylinder.
3. Is the cylinder filling too fast?
4. Was the wrong fill valve supplied?
5. Is there scale in the cylinder?
6. Is the water too conductive?
7. Was the wrong cylinder supplied?
6. Change the water supply.
7. Install correct cylinder type.
1. Is the drain blocked?
2. Is the drain restricted?
3. Is the cylinder filling too fast?
4. Was the wrong fill valve supplied?
5. Is there scale in the cylinder?
6. Is the water too conductive?
1. Clean the drain line.
2. Clean the drain line.
3. Replace the fill valve.
4. Replace the fill valve.
5. Rinse the cylinder.
6. Change the water supply.
1. Is the drain blocked?
2. Is the drain restricted?
3. Is the cylinder filling too fast?
4. Was the wrong fill valve supplied?
5. Is there scale in the cylinder?
6. Is the water too conductive?
1. Clean the drain line.
2. Clean the drain line.
3. Replace the fill valve.
4. Replace the fill valve.
5. Rinse the cylinder.
6. Change the water supply.
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Table 3. NH System Messages (cont)
NHTC Display Message
LED state
System Action
Symptom Diagnosed
E17: Req off current
RED
Humidifier interrupts operation
and the fault relay is activated.
With no system demand, current is
detected in the cylinder.
W18: Foam
YEL
RED
YEL
System will activate selected
foam algorithm. (See Figure 7.) attempt to self correct if foam mode is
active.
System has detected foaming and will
E18: Foam
System will activate selected
foam algorithm. (See Figure 7.) attempt to self correct if foam mode is
active.
System has detected foaming and will
W19: Cylinder spent
The electronics allow the
cylinder to be reset up to four
times before locking out the
humidifier.
Electronics have determined cylinder
is spent. Within the next 72 hours the
humidifier will stop.
E19: Cylinder spent
YEL, RED
YEL
Humidifier interrupts operation
and the fault relay is activated.
Electronics have determined that the
cylinder is spent.
W20: Conductivity too low
Humidifier will continue to
operate on this water supply.
Water conductivity is determined to be
less than optimum.
W23: Control sensor broken
E23: Control sensor broken
W24: Limit sensor broken
E24: Limit sensor broken
YEL
RED
YEL
RED
Humidifier put on standby. After Electronics cannot detect the control
a timeout period, this warning
becomes a fault.
RH sensor connected to the
humidifier.
Humidifier interrupts operation
and the fault relay is activated.
Electronics cannot detect the control
RH sensor connected to the
humidifier.
Humidifier put on standby. After Electronics cannot detect the limit RH
a timeout period, this warning
becomes a fault.
sensor connected to the humidifier.
Humidifier interrupts operation
and the fault relay is activated.
Electronics cannot detect the limit RH
sensor connected to the humidifier.
W25: 3-day idle drain
activated
YEL
YEL
The humidifier drains the
cylinder after three days of
inactivity.
This safety feature drains standing
water.
W26: 3-day forced drain
activated
The humidifier drains the
cylinder after three days of
operation.
This customer selected feature drains
the cylinder to remove minerals.
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Probable Cause
Corrective Action
1. Replace the contactor.
1. Is the contactor closed but not energized?
2. Does the processor board display capacity output but
contactor is open?
2. Replace the driver board.
1. Back pressure?
2. Organics present in water?
3. Insufficient drain or over concentration.
1. Verify drain is functioning and clean.
2. Verify steam line installation.
3. Check optional inline filter.
1. Back pressure?
2. Organics present in water?
3. Insufficient drain or over concentration.
1. Verify drain is functioning and clean.
2. Verify steam line installation.
3. Check optional inline filter.
The cylinder must be replaced with the same type and
model.
When ordering a new cylinder, quote the model number of
cylinder presently installed in the humidifier or serial
number of humidifier.
The cylinder must be replaced with the same type and
model.
When ordering a new cylinder, quote the model number
presently installed in the humidifier.
1. Is the drain leaking?
2. Adjust drain factor.
1. Clean the drain valve.
2. Set drain factor to 0.7.
3. Check the system backpressure.
4. Is salt required?
3. Install a fill cup extension kit if required.
4. Add one teaspoon of table salt.
1. Is the sensor powered?
2. Is the sensor wiring correct?
3. Is the sensor defective?
4. Is the RH less than 5%?
1. Use a multimeter to check that the sensor is powered.
2. Verify wiring is correct as per wiring instructions.
3. Replace the sensor.
4. RH values under 5% are interpreted as a broken
sensor.
1. Is the sensor powered?
2. Is the sensor wiring correct?
3. Is the sensor defective?
4. Is the RH less than 5%?
1. Use a multimeter to check that the sensor is powered.
2. Verify wiring is correct as per wiring instructions.
3. Replace the sensor.
4. RH values under 5% are interpreted as a broken
sensor.
1. Is the sensor powered?
2. Is the sensor wiring correct?
3. Is the sensor defective?
4. Is the RH less than 5%?
1. Use a multimeter to check that the sensor is powered.
2. Verify wiring is correct as per wiring instructions.
3. Replace the sensor.
4. RH values under 5% are interpreted as a broken
sensor.
1. Is the sensor powered?
2. Is the sensor wiring correct?
3. Is the sensor defective?
4. Is the RH is less than 5%?
1. Use a multimeter to check that the sensor is powered.
2. Verify wiring is correct as per wiring instructions.
3. Replace the sensor.
4. RH values under 5% are interpreted as a broken
sensor.
---
---
To disable this feature, consult the programming manual
shipped with the humidifier.
To disable this feature, consult the programming manual
shipped with the humidifier.
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Table 3. NH System Messages (cont)
NHTC Display Message
LED state
System Action
Symptom Diagnosed
W27: Safety loop instability
YEL
The safety loop is interrupting
humidifier operation.
A security control is causing the safety
loop to switch on and off too rapidly.
W28: demand signal instability YEL
The demand signal is swinging The demand signal is unstable.
from low demand to high
demand too quickly.
W29: limit signal instability
YEL
The limit signal is swinging from The limit signal is unstable.
low demand to high demand too
quickly and the humidifier
cannot respond.
W30: Modbus remote disable YEL
The humidifier is being
controlled via the network, not
locally.
The humidifier has been disabled by a
network message.
W43: Keep warm active
YEL
YEL
This is a customer selectable
feature to keep the cylinder
water warm.
The humidifier is in standby mode.
The cylinder may energize at any
time.
W44: Demand signal short
cycling
The cylinder automatically
reduces the humidifier output to off too frequently.
stabilize operation.
The demand signal is cycling on and
W45: safety loop short cycling YEL
The cylinder automatically
The demand signal is cycling on and
reduces the humidifier output to off too frequently.
stabilize operation.
W46: RH high warning
W47: RH low warning
YEL
YEL
An alarm indication is
generated.
RH levels higher than the limit set
have been detected. The humidifier
should not be operational with this
warning activated.
The humidifier is operating and RH levels lower than the limit set have
an alarm indication is
generated.
been detected. The humidifier should
be operational with this warning
activated.
W49: wrong cylinder installed YEL
E50: Modbus Timeout RED
An alarm indication is
generated.
The cylinder installed is not the
recognized type for the humidifier.
Systems shuts down.
Time window for Modbus has elapsed.
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Probable Cause
Corrective Action
1. The high limit is too close to the distributor.
2. Is there loose wiring?
1. Relocate high limit 10 feet from the steam
distributor.
3. Are there defective controls?
4. Is the safety high limit set point is too low?
2. Check all wires at the safety controls.
3. Replace any defective device.
4. Change high limit set point to 85% or more.
1. The high limit is too close to the distributor.
2. Is the controller defective?
1. Relocate high limit 10 feet from the steam
distributor.
3. Are the P and I settings incorrect?
2. Replace the controller.
3. Adjust the P and I constants.
1. The high limit is located too close to the distributor.
2. Is the controller defective?
1. Relocate high limit 10 feet from the steam
distributor.
3. Are the P and I settings incorrect?
4. Safety high limit set point is set too low.
2. Replace the controller.
3. Adjust the P and I constants.
4. Change high limit set point to 85% or more.
---
---
Contact the system administrator to override the remote
command.
To disable this feature, consult the programming manual
shipped with the humidifier.
1. Is the humidifier oversized?
2. Check the sensor location.
3. Are the P and I settings incorrect?
1. Reduce manual capacity setting by 50%.
2. The sensor should be located away from doors and
drafts.
3. Adjust the P and I constants.
1. Is the humidifier oversized?
2. Is the high limit located too close to the distributor?
3. Are the safety controls damaged?
1. Reduce manual capacity setting by 50%.
2. Relocate the high limit to 10 feet from the steam
distributor.
3. Replace any damaged controls.
1. Is the humidifier still operating?
2. Is the humidifier oversized?
1. Verify that the RH setpoint is less than the RH high limit
setting.
2. Reduce the manual capacity setting by 50%.
1. Is the humidifier still operational?
2. Is the humidifier oversized?
1. Verify that the RH setpoint is greater than the RH low
limit setting.
2. Set the manual capacity setting to 100%.
3. Add more humidifiers.
---
Verify that the replacement cylinder is the same as the old
cylinder.
1. Loose wire.
1. Verify cables.
2. Electronics damaged.
3. Electromagnetic Interference.
2. Replace electronics or contact factory.
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Table 4. Term Definitions
Term
Definition
RATED AMPS
Refers to amps listed on the humidifier specification label.
SHORT CYCLING When the ‘on time’ of the humidifier is less than ten minutes upon a call for humidity. To correct
short cycling, all humidifiers have a capacity adjustment which allows the output of the humidifier to
be reduced as low as 20% of rated output, thus extending the ‘on time’ required to maintain output.
FOAMING
This phenomenon can occur in water when the impurities, already in the water, reach an excess
concentration as result of boiling away pure water, and the continued boiling action agitating the
contained water. The humidifier electronics are designed to prevent this occurrence, although in
extreme cases water will foam with little concentration making it necessary to have the drain time of
the water, contained in the cylinder, increased. Foaming is normally caused by short cycling, a
restricted drain, or back pressure. The foam generated in these instances, is conductive and may
lead to a false full cylinder indication if the level of the foam approaches the top of the cylinder.
BACK PRESSURE This can be caused by restriction of steam flow caused by long steam runs; improperly sloped
steam lines; elbows changing the direction of the steam flow from horizontal to vertical without a
drain leg, any plumbing detail allowing the accumulation of condensate; undersized steam line;
improper steam distributor; downward air flow onto the distributor creating excess static pressure at
the steam outlets; or high static pressure ducts (not probable). To overcome excess static pressure
in the duct, a fill cup extension kit should be used. In downflow applications, a downflow distributor
should be used but in some cases the fill cup extension will also be required.
RESET UNIT
(HUMIDIFIER)
To reset the humidifier, the ON/OFF switch at the front of the humidifier should be switched to the
OFF position for a minimum of five seconds and then switched back to the ON position.
MONITORED LEG Refers to the primary wire to the cylinder which loops through the current sensing device on the
driver PCB. This wire is terminated at the red cylinder plug at the cylinder. Units with six primary
wires to the cylinder will monitor only one of the two wires, terminating with red plugs.
CONDENSATE
Refers to steam that has condensed to a liquid.
6. 0-10V DIGITAL HUMIDISTAT SENSOR CALIBRATION
A. PROCEDURE
(1) The humidity sensor is factory calibrated, however, it can be field recalibrated. The
calibration routine can be accessed by pressing and holding down the option button for
five seconds. A new screen will appear with the calibration adjustments.
(a) Press the up
or down
buttons until calH appears on the LCD screen.
(b) To adjust the calibration press the Option
display the current calibration trim.
button. The screen should load to
(c) The calibration trim can be adjusted by pressing the up or down buttons to the
desired level and then pressing the option button to confirm the settings.
(d) Press the Power
button to return to the normal display.
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TECHNICAL
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1. WIRING AND TERMINALS
A. HUMIDIFIER CONTROL INFORMATION
(1) See Figure 7 and Figure 9 in Chapter 10-10 for Controller and Transducer terminal
definitions. See Figure 6 in Chapter 10-10 for low voltage terminal strip terminal
definitions.
Table 1. Controller and Sensor Specifications
Power Supply
Signal Inputs
Operating Voltage
24 VAC ± 10%
50/60 Hz
Power Consumption
Internal Rectification
Max. 3 VA
Half-wave rectified
Analog Input
Input Signal
Resolution
Accuracy
AI1
2-10 VDC
39 mV, 0.078 mA
± 2%
Temperature Input
Range
External Thermistor
-40° to 140°C (-40° to 284°F)
Humidity Input:
Range
0 to 100 %RH
± 3.0% at 25°C (77°F)
± 0.5%
Accuracy
Repeatability
Signal Outputs
Environment
Digital Outputs
Maximum Load
DO1
24 VAC 2A max.
Operation
Temperature
Humidity
0° to 50°C(32° to 122°F)
<95%RH
Housing Materials
Cover, back
Mounting Plate
Fire proof ABS plastic
Galvanized Steel
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B. NH WIRING
(1) See Figure 1and 2 for the NHTC/NHPC Single and Double Unit Wiring diagrams.
Figure 1. NHTC/NHPC Double Unit Wiring Diagram
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Figure 2. NHTC/NHPC Wiring Diagram
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2. CHECK LISTS
A. PRE-NORTEC ONLINE START UP CHECKLIST WIRING
(1) Humidifier-to-Humidifier
Connection:
(4) Start-Up Procedure:
Ensure power is being supplied
to the humidifier and Nortec
Online Module.
Each individual Humidifier linked
to lead Unit.
Connection can be direct or
daisy-chained to other units.
Verify power to NetBiter (Power
LED should be lit).
(2) Network Connection:
After power-up, verify network
communication.
Lead Unit wired to Local Network
(Ethernet, GPRS, Dial-up).
Verify variable operation after
mapping is complete.
Network activity verified.
Perform regular humidifier
start-up check.
(3) Controls Wired:
Directly to humidifiers.
B. PRE-NORTEC LINKS START-UP CHECKLIST
(1) Humidifier-to-Humidifier
Connection:
(4) Start-Up Procedure:
Verify power to NORTEC Links
module.
Each individual Humidifier linked
to lead Unit.
Verify power to I/O-Controller.
Connection can be direct or
daisy-chained to other units.
Adjust Network address dials to
desired address (BACnet/IP
address is preset at factory).
(2) Network Connection:
Lead Unit wired to Local BMS.
Network activity verified.
(3) Controls Wired:
After power-up, verify network
communication.
Map desired network variables to
BMS.
Directly to humidifiers.
Verify variable operation after
mapping is complete.
Perform regular humidifier start-
up check.
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C. HUMIDIFIER MANDATORY PRE-START UP CHECKLIST
Unit Serial #: _________________No. of humidifiers: _______ Tag: _______________
Unit type: _______ __________Voltage: _____V/___ph
Steam output: ____lbs/hr
Customer/Job: ______________ Address: _____________________________
Inspected by: ________________Date of inspection: ____/____/____
WATER QUALITY:
Well water ___
City water ___
Softened water ___
RO / DI water ___
Conductivity: _______ mhmos
Hardness: _____ gr.
HUMIDIFIER MOUNTING:
Clearances around the unit
– Front (door opens freely?)
– Top (steam lines)
Acceptable
Obstruction
3 ft min. ______________________
2 ft min. ______________________
2 ft min. ______________________
2 ft min. ______________________
– Bottom (fill, drain, controls)
– Right (main pwr)
STEAM LINES:
CONDENSATE LINES:
– Slope up 2 in. per 12 in. ___
– Slope down 0.500 in. per 12 in. ___
– Traps ___
– Insulated ___
– Length/Size _____/_______
– Sloped back to drain ___
– Trapped 2 in. more than static
duct pressure ___
– Size _______
– Stainless steel ___ or plastic ___
– ____% Vertical ____% Horizontal
– 90 degree elbows ___ qty: ____ – 45 degree Elbows ___ qty: ____
– Can condensate be trapped anywhere in the steam line? yes ___ no ___
WATER LINES:
– 0.050 in. at max 4ft from the unit ___– 3/8 in. connection at fill G
– Water pressure: 30-80 psig ___ – PVC ___ – Stainless steel ___
DRAIN LINES:
– Air gap located within 3 ft of the unit ___ – Sloped to drain ___
CYLINDER:
– Cylinder properly installed and sitting upright
WIRING:
– No loose wires around the unit or on the PC board? yes ___ no ___
CONTROLS:
Installed Location / Wiring /Setting
– Size:________
Installed Location / Wiring /Setting
– High limit: ___ ____________________ – Air proving: ___ ____________________
– Mod controller: ___ ________________– Other: ___ ________________________
POWER:
– Voltage, amperage rating and fuse correspond to Spec Label: ___
– Disconnect switch located close to humidifier: ___
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D. HUMIDIFIER MANDATORY START-UP CHECKLIST AND QUICK REFERENCE
Unit Serial #: _________________No. of humidifiers: _______ Tag: _______________
Unit type: ___________________Voltage: _____V/___ph
Steam output: ____lbs/hr
Customer/Job: ______________ Address: ______________________________________
Inspected by: ________________Date of inspection: ____/____/____
1. PRELIMINARY:
– Pre-start-up checklist completed? yes ___ no ___
If no, return to Pre-Start-up Checklist before going on with start-up procedure.
2. START-UP PROCEDURE:
The prerequisites for getting power and water into the steam cylinder are as follows:
– check that main breaker is on and power is at the unit.
– check that main water shut-off valve is open.
– on/off/drain switch must be switched on.
– control circuit 1-2 must be made.
– modulation humidistat, if present, must be calling.
– door interlock switch must be made (interlock switch can be pulled out to operate unit).
The unit will undergo a self-test to ensure integrity of all the components:
– NHTC Start-Up Unit Cylinder
– Reading Cylinder Data
– Inlet Valve
– Drain Valve
– Heat Controller
– Pump
– Bleed Valve
– Steam Relay
– Service Relay
– Error Relay
– Operation Relay
It will then start filling the cylinder and begins normal operation. Most water does not
contain enough conductivity for full boil on initial start-up. Units will need to concentrate
the water over a time period (hours to days).
Remarks:
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
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E. PERIODIC MAINTENANCE CHECKLIST AND QUICK REFERENCE (PAGE 1 OF 2)
Unit Serial #: _________________No. of humidifiers: _______ Tag: _______________
Unit type: ___________________Voltage: _____V/___ph
Steam output: ____lbs/hr
Customer/Job: ______________ Address: ______________________________________
Inspected by: ________________Date of inspection: ____/____/____
WHEN TO REPLACE THE CYLINDER:
NHTC/NHPC light indication and LCD display:
1.
Yellow and Green light with W19: Cylinder Spent indicates the cylinder must be
replaced in the next 72 hours.
2.
Red and Yellow light with E19: Cylinder Spent indicates the cylinder is at the end of
its life and must be replaced.
CYLINDER REPLACEMENT PROCEDURE:
1.
2.
3.
4.
5.
Turn off water supply to unit.
Activate drain to completely empty water content (less than 10 minutes)
When drained, stop drain and turn off unit.
Also open the main electrical disconnect switch and open plumbing.
Remove the cylinder plugs by pulling vertically. The plugs are press-fitted over the
electrode pins protruding from the top of the cylinder.
6.
7.
Using a slotted screwdriver, loosen the steam line clamp(s) and pull steam line off
the cylinder vertically.
Using a small slotted screwdriver, depress tab on the re-usable cable tie, if present,
around the middle of the cylinder. This will loosen the cable tie to come apart for re-
use later on.
8.
The cylinder is now ready to be removed from the unit.
CAUTION: Cylinder and any remaining water might still be HOT.
9. Always clean the drain valve before installing a new cylinder. (see further below)
10. Remove the used cylinder and replace by a new one. Do not re-use cylinder.
MANDATORY CLEANING OF THE DRAIN VALVE
1.
Note that ring terminal for drain valve green ground wire is sandwiched between
drain valve body and drain pan.
2.
Remove two screws securing drain valve body to drain pan. Disconnect the two
slip-on terminals from the two tabs on the (24 VAC) drain valve coil.
3.
4.
Remove hose clip and hose connection from drain valve body.
Drain valve assembly is now free to be taken to a sink for disassembly and cleaning.
Important: Tapered end of spring must be installed toward the solenoid.
5.
Clean out the end of the hose, and then reconnect it to the drain valve body with the
clamp.
6.
Fit mounting screws through drain valve body, one through ring terminal on green
ground wire.
WARNING: To prevent the possibility of electrical shock the green ground wire must be
reinstalled before power is restored. Push the two slip-on terminals back onto
the two tabs on the coil. The terminals, although not identical, are reversible.
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E. PERIODIC MAINTENANCE CHECKLIST AND QUICK REFERENCE (PAGE 2 OF 2)
Unit Serial #: _________________No. of humidifiers: _______ Tag: _______________
Unit type: ___________________Voltage: _____V/___ph
Steam output: ____lbs/hr
Customer/Job: ______________ Address: ______________________________________
Inspected by: ________________Date of inspection: ____/____/____
HOW TO INSTALL THE REPLACEMENT CYLINDER
1.
2.
3.
Reverse procedure should be followed to install new cylinder. Main disconnect is to
be left open until cylinder is completely installed and reconnected.
Ensure that the re-usable cable tie and mounting brackets, within the unit, secure the
cylinder properly.
The cylinder plug wires are colour-coded in accordance with coloured dots beside
the electrode pins on top of the cylinder.
4.
5.
This colour coding must be adhered to when replacing cylinder plugs on pins.
With cylinders having six primary voltage cylinder plugs, it should be noted that there
are two of each colour.
6.
7.
Care must be taken so that cylinder leads of the same color are always directly
opposite each other as indicated by the dot formation on the top of the cylinder.
The white cylinder plug on all units is for the high water sensor electrode, which
always goes on the single pin surrounded by a plastic shoulder.
8.
9.
Ensure that cylinder plugs fit snugly on the pins.
If cylinder plugs become loose, it is best to obtain a new replacement plug. Consult
factory.
EXTENDED SHUTDOWN:
1.
Before disconnecting power to the humidifier for a period of extended shutdown,
ALWAYS DRAIN the cylinder first.
2.
3.
‘Open’ the main external fused disconnect to stop power to the humidifier.
Close the shut-off valve in the water supply line feeding the humidifier.
ACCESS SHOULD BE LIMITED TO AUTHORIZED PERSONNEL ONLY.
4.
NHTC 3 day drain: As long as the NHTC is powered, it will automatically drain the
cylinder when there has not been a call for humidity for an extended period of time.
5.
The cylinder will remain empty until there is a call for humidity at which time the fill
valve will open and refill the cylinder.
This feature will reduce the possibility of corrosion of the electrodes and the possible
accumulation of algae and bacteria growing in the cylinder.
Remarks:
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
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3. SPARE PARTS AND EXPLODED VIEWS
A. ASD, BSD, CSD DISTRIBUTOR
(1) See Figure 3 for the ASD, BSD, CSD Distributor exploded view and spare parts.
Figure 3. Distributor Exploded View and Spare Parts
B. SAM-e SPARE PARTS
(1) See Figure 4 for the SAM-e exploded view and spare parts.
Figure 4. SAM-e Exploded View and Spare Parts
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C. NH SERIES HUMIDIFIER SPARE PARTS
(1) See Figure 5 for the NHTC/NHPC plumbing compartment exploded view and spare
parts and Table 2 for the parts list. See Figure 6 for the NHTC/NHPC electrical
compartment exploded view and spare parts and Table 3 for the parts list.
Figure 5. NHTC/NHPC Plumbing Compartment Exploded View and Spare Parts
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6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 1 5 5
4 8 0 1 - / 1 4 4
0 / 1 3 8
7 / 1 2 7
2 4 0 0 - / 1 2 2
8 / 1 2 0
6 0 0 0 - / 1 5 5
4 8 0 0 - / 1 4 4
0 / 1 3 8
7 / 1 2 2
2 4 0 0 - / 1 2 2
8 / 1 2 0
0
1 2 0 1 - 1
H P S T / L V O
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6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 1 5 5
4 8 0 1 - / 1 4 4
0 / 1 3 8
7 / 1 2 7
2 4 0 0 - / 1 2 2
8 / 1 2 0
6 0 0 0 - / 1 5 5
4 8 0 0 - / 1 4 4
0 / 1 3 8
7 / 1 2 2
2 4 0 0 - / 1 2 2
8 / 1 2 0
0
1 2 0 1 - 1
H P S T / L V O
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Figure 6. NHTC/NHPC Electrical Compartment Exploded View and Spare Parts
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6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 1 5 5
4 8 0 1 - / 1 4 4
0 / 1 3 8
7 / 1 2 7
2 4 0 0 - / 1 2 2
8 / 1 2 0
6 0 0 0 - / 1 5 5
4 8 0 0 - / 1 4 4
0 / 1 3 8
7 / 1 2 2
2 4 0 0 - / 1 2 2
8 / 1 2 0
0
1 2 0 1 - 1
H P S T / L V O
S H O N W O N T
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6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 3 5 5
4 8 0 0 - / 3 4 4
0 / 3 3 8
2 4 0 0 - / 3 2 2
8 / 3 2 0
6 0 0 0 - / 1 5 5
4 8 0 1 - / 1 4 4
0 / 1 3 8
7 / 1 2 7
2 4 0 0 - / 1 2 2
8 / 1 2 0
6 0 0 0 - / 1 5 5
4 8 0 0 - / 1 4 4
0 / 1 3 8
7 / 1 2 2
2 4 0 0 - / 1 2 2
8 / 1 2 0
0
1 2 0 1 - 1
H P S T / L V O
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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. No
warranty is made against corrosion, deterioration, or suitability of substituted materials
used as a result of compliance with government regulations.
(2) THE COMPANY’s obligations and liabilities under this warranty are limited to furnishing
replacement parts to the customer, F.O.B. THE COMPANY’s factory, providing the
defective part(s) is returned freight prepaid by the customer. Parts used for repairs are
warranted for the balance of the term of the warranty on the original humidifier or
90 days, whichever is longer.
(3) The warranties set forth herein are in lieu of all other warranties expressed or implied
by law. No liability whatsoever shall be attached to THE COMPANY until said products
have been paid for in full and then said liability shall be limited to the original purchase
price for the product. Any further warranty must be in writing, signed by an officer of
THE COMPANY.
(4) THE COMPANY’s limited warranty on accessories, not of the companies manufacture,
such as controls, humidistats, pumps, etc. is limited to the warranty of the original
equipment manufacturer from date of original shipment of humidifier.
(5) THE COMPANY makes no warranty and assumes no liability unless the equipment is
installed in strict accordance with a copy of the catalog and installation manual in effect
at the date of purchase and by a contractor approved by THE COMPANY to install
such equipment.
(6) THE COMPANY makes no warranty and assumes no liability whatsoever for
consequential damage or damage resulting directly from misapplication, incorrect
sizing or lack of proper maintenance of the equipment.
(7) THE COMPANY makes no warranty and assumes no liability whatsoever for damage
resulting from freezing of the humidifier, supply lines, drain lines, or steam distribution
systems.
(8) THE COMPANY makes no warranty and assumes no liability whatsoever for
equipment that has failed due to ambient conditions when installed in locations having
climates below 14°F (-10°C) during January or above 104°F (40°C) during July. (See
Table 1: Weather Design Data above).
(9) THE COMPANY retains the right to change the design, specification and performance
criteria of its products without notice or obligation.
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INSTALLATION DATE (MM/DD/YYYY)
MODEL #
SERIAL #
CYLINDER #
Cylinder Replacement Date (MM/DD/YYYY)
Authorized Agent:
U.S.A.
CANADA
Walter Meier (Climate USA) Inc.
Walter Meier (Climate Canada) Ltd.
826 Proctor Avenue
2740 Fenton Road
Ogdensburg, NY 13669
Ottawa, ON K1T 3T7
TEL: 1-866-NORTEC-1
FAX: (613) 822-7964
TEL: 1-866-NORTEC-1
EMAIL: [email protected]
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