Nortec NHTC, NHPC User Manual

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Series

NHTC / NHPC ELECTRODE STEAM HUMIDIFIER

Engineering Manual

2538144-B

PROPRIETARY NOTICE

This document and the information disclosed herein are proprietary data of WALTER MEIER LTD. Neither this document nor the information contained herein shall be reproduced used, or disclosed to others without the written authorization of WALTER MEIER LTD., except to the extent required for installation or maintenance of recipient’s equipment. All re ferences to the NORTEC name should be taken as referring to WALTER MEIER LT D.

LIABILITY NOTICE

NORTEC does not accept any liability for installations of humidity equipment installed by unqualified personnel or the use of parts/components/equipment that are not authorized or approved by NORTEC.

SPECIFICATION LABEL LOCATION

The Specification Label for your NH Series humidifier is located on the bottom of the unit. You will find it attached to the skirt that separates the electrical and plumbing comp ar tments on the electrical compartment side.

RECORD OF REVISIONS

For each revision, put the revised pages in your manual and disca rd the superseded pages. W rite the revision number and revision date, date put in manual, and the incorporator’s initials in the applicable columns on the Record of Revisions.

Revision

Number

Revision

Date

Date Put

In Manual By

Revision

Number

Revision

Date

Date Put

In Manual By

2008-10-01

TABLE OF CONTENTS

Subject Page

10-00 ELECTRODE STEAM ENGINEERING

1. INTRODUCTION WHY ELECTRODE STEAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

A. PROPORTIONAL + INTEGRAL AUTO-ADAPTIVE CONTROL SYSTEM FOR

THE NHTC/NHPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

B. NH CAPACITY ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

C. DRAIN CYCLE AND CYLINDER LIFE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2. PRE-INSTALLATION EQUIPMENT VERIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

A. GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

10-10 HUMIDITY, STEAM ABSORPTION AND DISTRIBUTION

1. HUMIDITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

A. ESTIMATING THE HUMIDIFICATION LOAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

B. LOAD CALCULATION SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

C. TEMPERATURE AND HUMIDITY REQUIRED . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

D. TEMPERATURE AND HUMIDITY AVAILABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

E. INCOMING AIR VOLUME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2. STEAM ABSORPTION AND DISTRIBUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

A. VARIABLES THAT AFFECT ABSORPTION DISTANCES. . . . . . . . . . . . . . . . . . . .28

B. CALCULATING THE DOWN STREAM HUMIDITY LEVEL . . . . . . . . . . . . . . . . . . .30

C. CONTROL OF DUCT OR PLENUM SATURATION. . . . . . . . . . . . . . . . . . . . . . . . . 31

3. STEAM RUNS AND CONDESNATE RETURNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

A. STEAM RUNS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

B. CONDENSATE RETURN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

4. STEAM DISTRIBUTORS (ASD, BSD, CSD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

A. STEAM DISTRIBUTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

B. DISTRIBUTOR CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

C. DISTRIBUTOR LOCATIONS AND MOUNTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

D. MULTIPLE DISTRIBUTOR APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

E. LOCATION OF STEAM DISTRIBUTORS WITHIN AN AIR HANDLER . . . . . . . . . . 40

F. DISTRIBUTOR ABSORPTION DISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

G. TYPICAL APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

H. DISTRIBUTOR DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

5. SHORT ABSORPTION MANIFOLD (SAM-e) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

A. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

B. DETERMINING THE STEAM ABSORPTION DISTANCE . . . . . . . . . . . . . . . . . . . . 43

C. STATIC AIR PRESSURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

D. CONDENSATE LOSSES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

E. CORRECT CHOICE OF PRODUCT APPLICATIONS (WITHIN SAM-e) . . . . . . . . 46

F. SAM-e DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

G. SAM-e HEADER SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

H. SAM-e STEAM TUBE SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

I. SAM-e STEAM INLET CONFIGURATION SELECTION . . . . . . . . . . . . . . . . . . . . .48

J. MINI SAM-e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

6. BLOWER PACKS (BOBP, RMBP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

A. BLOWER PACKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

2008-10-01

Subject Page

7. CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

A. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

B. ON/OFF CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

C. MODULATING CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

D. OUTDOOR TEMPERATURE SETBACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

E. TRANSDUCER SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

F. POSITIONING CONTROLS AND SENSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

G. NORTEC ONLINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

H. NORTEC LINKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

I. TYPICAL INSTALLATION LAYOUT FOR NHTC/NHPC . . . . . . . . . . . . . . . . . . . . . 58

J. NORTEC CONTROLLER DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

10-20 SPECIFICATIONS

1. HUMIDIFIERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

A. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

B. PRODUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

C. EXECUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

10-30 SUBMITTALS

1. SUBMITTAL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

A. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

B. NH UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

C. DISTRIBUTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

D. SAM-e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

E. BLOWER PACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

F. CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

WARRANTY

2008-10-01

LIST OF FIGURES

Figure Page

10-00 ELECTRODE STEAM ENGINEERING

Figure 1. NHTC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Figure 2. Optimum Boiling Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Figure 3. Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Figure 4. Typical Auto-Adaptive Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 5. Capacity Setting & Cylinder Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Figure 6. Output vs Service Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Figure 7. Typical NHRS Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

10-10 HUMIDITY, STEAM ABSORPTION AND DISTRIBUTION

Figure 1. Schematic of a Typical Print Shop HVAC System . . . . . . . . . . . . . . . . . . . . . . 19

Figure 2. Psychrometric Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Figure 3. Steam Distributor Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Figure 4. Condensate Drain Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 5. Proper Slope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Figure 6. Drain Tee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Figure 7. Steam Line Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Figure 8. Condensate Tee At Any Low Point In Steam Line . . . . . . . . . . . . . . . . . . . . . . .35

Figure 9. Trap To Prevent Steam In Condensate Line . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Figure 10. Levelling the Distributor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Figure 11. Single Steam Distributor Installation – Minimum Clearance . . . . . . . . . . . . . . .38

Figure 12. Cutting Duct For Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Figure 13. Humidification Distance Nomogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 14. Best Location for Multiple Steam Distributors . . . . . . . . . . . . . . . . . . . . . . . . . .40

Figure 15. Roof Top Units 2-20 Tons – Typical Location . . . . . . . . . . . . . . . . . . . . . . . . . .41

Figure 16. Small Units On Residential Furnaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Figure 17. SAM-e Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Figure 18. Cross-Section of Distributor Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Figure 19. Absorption Distance – 3" Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Figure 20. Absorption Distance – 6" Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Figure 21. Absorption Distance – 9" Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Figure 22. Absorption Distance – 12" Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Figure 23. SAM-e Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Figure 24. SAM-e Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Figure 25. Steam Inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Figure 26. Typical SAM-e Installation for Atmospheric Steam Applications . . . . . . . . . . . .50

Figure 27. NH Series Humidifier With Built-On Blower Pack . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 28. NH Series Remote Mounted Blower Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Figure 29. Set Point Versus Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 30. NORTEC OnLine Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Figure 31. NORTEC Online Configuration Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Figure 32. NORTEC Links Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

2008-10-01

Figure Page

Figure 33. Humidifier Controlled by Air Proving, On/Off Duct Mounted High Limit and

Modulating Wall Mounted Space Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Figure 34. Humidifier Controlled by Air Proving, Modulating Duct Mounted High Limit

and Modulating Wall Mounted Space Controller . . . . . . . . . . . . . . . . . . . . . . . . 61

Figure 35. Humidifier Controlled by Air Proving, Modulating Duct Mounted High Limit

and Modulating Wall Mounted Return Air Sensor with Wall Mounted

Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Figure 36. Humidifier Controlled by Air Proving, Duct Mounted High Limit Sensor

and Modulating Duct Mounted Return Air Sensor with Networking Option . . . . 62

10-30 SUBMITTALS

Figure 1. Low Voltage Control Terminal Strip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Figure 2. Primary (Line) Voltage Wiring to Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Figure 3. Physical Data - NHTC/NHPC 005-030 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Figure 4. Physical Data - NHTC/NHPC 050-100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Figure 5. Physical Data - NHTC/NHPC 150-200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Figure 6. Distributor Dimensions (3 Sheets) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Figure 7. SAM-e General Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Figure 8. General Mini SAM-e Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Figure 9. In-Duct/AHU Installation Without Mounting Frame Installation . . . . . . . . . . . . . 87

Figure 10. In-Duct/AHU Installation With Mounting Frame Installation . . . . . . . . . . . . . . . . 88

Figure 11. Outside Duct Installation Without Mounting Frame Installation . . . . . . . . . . . . . 89

Figure 12. Outside Duct Installation With Mounting Frame Installation . . . . . . . . . . . . . . . . 90

Figure 13. Vertical Duct Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Figure 14. Outside Duct Mounting Cover Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Figure 15. Atmospheric SAM-e Adapter Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 16. Atmospheric Steam Header and Adapter Configuration . . . . . . . . . . . . . . . . . . 93

Figure 17. Physical Data for Remote Mounted Blower Pack . . . . . . . . . . . . . . . . . . . . . . . 94

Figure 18. Physical Data Units With Optional Built-On Blower Packs . . . . . . . . . . . . . . . . . 95

Figure 19. Wall Digital Humidistat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Figure 20. Duct Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

2008-10-01

LIST OF TABLES

Table Page

10-00 ELECTRODE STEAM ENGINEERING

Table 1. Features Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 2. NHTC/NHPC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

10-10 HUMIDITY, STEAM ABSORPTION AND DISTRIBUTION

Table 1. Outdoor/Indoor Relative Humidity Conversion Chart . . . . . . . . . . . . . . . . . . . . 14

Table 2. Load Calculation Summary Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Table 3. Grains of Water Per Cubic Foot – Saturated Air (100% rh) . . . . . . . . . . . . . . . 15

Table 4. Design Outdoor Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 5. Inside Relative Humidities At Which Moisture Will Condense On Windows . . 21

Table 6. Regain of Hygroscopic Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Table 7. Design Indoor Conditions For Various Places, Products and Processes . . . . . . 23

Table 8. Variables That Affect Absorption Distances . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Table 9. Typical Absorption Distances, Single Distributor, 100 lbs/hr Humidifier . . . . . . .29

Table 10. Water (lbs/hr) Contained in 1000 CFM of Air . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 11. Steam Line Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 12. Recommended Material and Size for Steam Run . . . . . . . . . . . . . . . . . . . . . . .33

Table 13. Recommended Condensate Line at Distributor(s) . . . . . . . . . . . . . . . . . . . . . . . 33

Table 14. Maximum Recommended Length of Steam Runs . . . . . . . . . . . . . . . . . . . . . . . 34

Table 15. Air Pressure Loss in AHU/Duct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Table 16. Condensate Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Table 17. SAM-e Tube Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Table 18. Mini SAM-e Headers – 3" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Table 19. Mini SAM-e Headers – 6" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Table 20. Mini SAM-e Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Table 21. Mini Inlet Configurations – For Atmospheric Steam Unit . . . . . . . . . . . . . . . . . . 49

Table 22. Ceiling and Frontal Clearances for Blower Packs . . . . . . . . . . . . . . . . . . . . . . .52

10-30 SUBMITTALS

Table 1. NH Series Unit Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99

Table 2. Common Accessories Universal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100

Table 3. Steam Distributors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100

Table 4. Steam Distributor Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101

Table 5. SAM-e Header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

Table 6. Adjustable Mounting Frame for SAM-e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106

Table 7. SAM-e Tube Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106

Table 8. SAM-e Inlet and Adapter Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110

Table 9. Remote Blower Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111

Table 10. Built-On Blower Pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Table 11. Controls – ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112

Table 12. Modulating Control By NORTEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112

2008-10-01

Table Page

Table 13. Modulating Demand Signal By Others Single Channel. . . . . . . . . . . . . . . . . . . 113

Table 14. Modulating Demand Signal By Others Dual Channel. . . . . . . . . . . . . . . . . . . . 113

Table 15. Modulating By Other Transducer Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Table 16. NORTEC OnLine Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Table 17. NORTEC Links Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Table 18. NH Series Fusing Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

2008-10-01

10-00

INTRODUCTION

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Figure 1. NHTC

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2008-10-01

1. INTRODUCTION

The NHTC humidifier is controlled by Nortec’s Patented Auto adaptive Water Management Control System. This system allows the humidifiers to adapt to basically any potable incoming water and changes that occur to the water supply. This eliminates the need to readjust drain timers, changes complete cylinders or time consuming adjustment of electrode spacing’s. The system also adjusts the drain rate of the humidifier to reduce the amount of drain water exiting the humidifier as water conditions change. This reduces energy loss due to excessive draining of hot water and extends cylinder life since less water and minerals enter the humidifier.

The following is a brief description of how the Auto-Adaptive water Management System works.

The electrode steam system produces pure uncontaminated steam with variable output through electronic power control of the electrodes. Water borne minerals remain in the cylinder and are periodically flushed out through the automatic cylinder drain. On NHTC and NHPC models the drain automatically empties the steam cylinder if it is not operated for three days. Solid mineral scale sinks to the bottom of the cylinder which, when filled with residue, is easily removed and replaced.

A. PROPORTIONAL + INTEGRAL AUTO-ADAPTIVE CONTROL SYSTEM FOR THE

NHTC/ NHPC

(1) NORTEC’s patented P+I Auto-Adaptive control system allows the unit to operate at

an optimal low water level using the same fixed electrode spacing regardless of the incoming water conditions. Boiling of the water allows the minerals in the water to remain behind in the cylinder. This raises the contained water conductivity to a value higher than the incoming water. The P+I Auto-Adaptive control system monitors and adjusts the contained water conductivity as these changes occur.

(2) The humidifiers are designed to produce full steam output at the lowest possible

electrode coverage to obtain maximum cylinder life.

(3) The units operate between A and D of the main steam output demand.

Accordingly, the current flow between the electrodes in the cylinder is maintained between these pre-established limits programmed into the P+I Auto-Adaptive control system.

(4) As the water boils away and the electrode coverage is reduced, the steam output is

also reduced slightly. A pre-determined design parameter of every NORTEC cylinder is the known time (To) (time optimum) that it takes to boil down from A to D of output (also referenced to as amp trigger points) at a pre-designed contained water conductivity. (See Figure 2.)

(5) Whenever the conductivity in the cylinder water is lower than the designed

conductivity, the (Ta) (time actual) to boil down from A to D will be longer than the To. (See Figure 3.)

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Page 3 2008-10-01

(6) As the water is boiled away, the minerals left behind increase the conductivity of

the water in the cylinder. As soon as the conductivity is greater than design, the Ta to boil from A to D will be shorter than To and a drain cycle is initiated.

(7) The fill valve always opens during timer drains, adding cold water to mix with the

hot water from the cylinder during automatic drain cycles. This tempering process is required to meet plumbing codes.

(8) As can be seen from a typical sequence depicted in Figure 4, the P+I Auto-

Adaptive system allows the unit to be self-regulating. It drains only when necessary and only the amount of water to maintain optimum operating conditions.

(9) Relying on the proportional (P) feedback only to decide how much to drain is like

guessing what is happening based on a ‘snapshot’ only. By taking into consideration a series of “snapshots”: (one from each of the past ten cycles for example), the control system has more data on which to base its decision to drain. The integral (I) part of the P+I Auto-Adaptive system provides this added feedback.

(10) The proportional (P) and integral (I) factors have been weighted as to the relative

influence each will have when the NHTC/NHPC calculates a drain. The preprogrammed weighing was derived through extensive field and laboratory tests. When supply water conductivity is extremely high (requiring substantially more drains), the NHTC/NHPC will see the pattern developing in cycles stored in memory. It will then initiate additional drains to adjust the contained water conductivity.

(11) If low conductive water conditions occur, the P+I control will reduce the drains

necessary to maintain optimum operating conditions within the cylinder. If extreme water conditions are encountered, the NHTC/NHPC can be reprogrammed with factory instructions to compensate.

(12) NORTEC’s P+I Auto-Adaptive control system has been designed to benefit users

who demand very tight control of the relative humidity. It maintains steam output above the B level, even during auto drains. (See Figure 4.)

(13) The P+I Auto-Adaptive control system allows the humidifier to maintain tighter

humidity control without the problem of rh depression during drain cycles that occur with other humidifiers. This results in more consistent space rh levels, even with a simple on/off control system.

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2008-10-01

Figure 2. Optimum Boiling Time

Figure 3. Conductivity

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B. NH CAPACITY ADJUSTMENT

(1) Each NORTEC NH Series humidifier is rated at its maximum output capacity. By

means of the alphanumeric display and keypad on the NHTC/NHPC, the humidifiers can be adjusted to obtain an output between 20% and 100% of its rated capacity.

C. DRAIN CYCL E AND CYLINDER LIFE

(1) Water Type Used (Potable or Softened)

(a) The electrode steam product line is one of the most efficient humidifier

systems since it uses the minerals in the water to conduct electricity. If no minerals are present no current can pass from one electrode to another, thus no steam production can occur.

(b) Although the electrode steam humidifier is ideal for potable water, it should

not be used with pure reverse osmosis or deionized water since the conductivity is too low.

(2) Water Conditions vs Cylinder Life

(a) The NH Series is designed to adapt to most potable or softened water

supplies. Since the output of all NH Series humidifiers is pure, clean steam, minerals originally in the incoming water are left behind in the steam cylinder. Many of these minerals will be removed during short flush cycles within the cylinder. Therefore, the water chemistry, the unit running time, and output capacity setting ultimately determines the cylinder life. (See Figure .)

(3) Output vs Cylinder Life

(a) As minerals build-up on the electrodes in the cylinder of the NORTEC NH

Series humidifier, the patented P+I Auto-Adaptive control system automatically raises the water level slightly in the cylinder. This exposes fresh electrode surface to the water and maintains peak output and efficiency from the humidifier. Once the

(b) electrode surface is completely encrusted by the minerals, the user is alerted

to change the cylinder. Other humidifiers’ performance degrades gradually as the minerals build-up. The NH Series maintains maximum efficiency then the cylinder is replaced. (See Figure .)

(4) Water Conditions vs Drain Rate

(a) The P+I Auto-Adaptive control system automatically adjusts the drain rate to

maintain the design water conductivity required for proper operation. This ensures regular flushing of minerals which become concentrated in the water, and minimizing wastage of hot water. The humidifier automatically adjusts it’s drain rate with changes in incoming water conductivity through the Autoadaptive water management system.

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2008-10-01

0. Store previous cycle’s drain decision in integral (l) memory.

1. Fill to A trigger (use all places below 1-10).

2. Boil to C trigger without timing to allow previous fill water to mix thoroughly during boiling.

3. Boil from C to D while monitoring time (T actual).

4. Decide how long (how much) to drain, then fill to B.

5. Drain according to the P+I calculated drain time, fill on to control outlet temperature.

6. At D, stop draining and postpone remaining drain, fill to B.

7. Continue remaining drain.

8. With drain finished, fill to A.

9. Boil to D, timing from C to D.

10. Decide how long to drain (in this case zero) based on present and past cycles.

Figure 4. Typical Auto-Adaptive Operation

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It is important to note that the drain rate shown includes the make-up water, mixed with the drain water, which tempers the drain water to 140°F (60°C) or less.

NOTE

The electrode steam process provides optimum efficiency because all resistance to current passage is converted to usable energy. Unlike cal-rod or infrared humidifiers which convert some of their capacities into unusable heat.

Figure 5. Capacity Setting & Cylinder Life

Figure 6. Output vs Service Life

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2008-10-01

3. PRE-INSTALLATION EQUIPMENT VERIFICATION

A. GENERAL

(1) Ensure the available voltage and phase correspond with humidifier voltage and

phase as indicated on the humidifier’s specification label.

(2) Ensure that the external fuse disconnect is sufficient size to handle the rated

amperage as indicated on the humidifier’s specifications label. Refer to local building

codes. (3) Report any discrepancy immediately to the site engineer. (4) Location and mounting is described in Chapter 10-10. (5) For typical installation see Figures 6 & 7.

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Page 9 2008-10-01

Figure 6. Typical NHRS Installation (Sheet 1 of 2)

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2008-10-01

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Figure 7. Typical NHRS Installation (Sheet 2 of 2)

10-10

HUMIDITY,

STEAM ABSORPTION

AND

DISTRIBUTION

10-10

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2008-10-01

HUMIDITY, STEAM ABSORPTION AND DISTRIBUTION

1. HUMIDITY

A. ESTIMATING THE HUMIDIFICATION LOAD

Note: The humidification load can easily be calculated by using Nortec’s Humidification Engineering and Load-sizing Program (HELP). The softward can be downloaded at www.humidity.com

(1) Relative humidity is the percentage of moisture in the volume of air at a given

temperature, compared to the maximum amount of moisture that the volume of air can hold at the same temperature and atmospheric pressure. As air becomes warmer, it can absorb more moisture per unit volume. Therefore a quantity of air containing a specific amount of moisture will have different values of relative humidity as the temperature changes.

(2) It is this process that causes dry air in building. As cold incoming air is heated, its

relative humidity value drops. Therefore moisture must be added to attain an acceptable level of humidity within the building. Determining how much moisture must be added is the object of this brochure. Table 2 simplifies the calculations which are described here in detail.

B. LOAD CALCULATION SUMMARY

(1) In order to determine the humidification load three basic values need to be known:

(a) The design conditions of the humidified space, i.e., the temperature and humidity

required. (b) The conditions of the incoming air, i.e., the temperature and humidity available. (c) Incoming air volume and secondary conditions that can affect the humidification

load.

(2) Data and calculations required to estimate humidification load are described in

Tables 1, 2 and 3.

C. TEMPERATURE AND HUMIDITY REQUIRED

(1) The design temperature and humidity of a space depends mostly upon the job being

performed. Once the design temperature and humidity have been established, the required moisture can be found in gr/ft worst case (highest temperature, highest humidity).

(2) Formula 1

For example:

The press room of a printing plant should be kept at 76 - 80

Therefore, the worst case is 80

From Table 3 the required moisture is 11.04 gr/ft

D. TEMPERATURE AND HUMIDITY AVAILABLE

(1) The outdoor conditions tell us the moisture available in the incoming air. Approximate

values can be obtained from Table 4 and combined with Table 3 to find moisture available. Once again we must take the worst case (here, it is lowest temperature, lowest humidity). As can be seen, the contribution of moisture from the outside air is almost zero.

from Table 3. Remember always to take the

°F with 43% - 47% rh

°F, 47% rh.

x 47% = 5.19 gr/ft

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2008-10-01

Table 1. Outdoor/Indoor Relative Humidity Conversion Chart

100%2456791217192329364352

95%2346791216172228344150 90%2345681115162126313948 85%2345681114152024293745 80%2345671013151923273542 75%2344571012141822263339 70%123456911131720243136 65%123445810121519232934 60%12334579111417212631 55%11334478101316192429 50%1123346891214182226 45%1123346781113162024 40%1122345771012141821 35%112224566910121518

Outdoor relative humidity

30%01222345679111315 25%0111233455791113 20%011122334557910 15%00111123344568 10%00011122233346

5%00000011122233 0%00000000000000

-20° -10° -5° 0° +5° +10° +15° +20° +25° +30° +35° +40° +45° +50°

Chart shows what the residual indoor RH would be at 70°F under varying outdoor conditions if a proper humidification system were not installed in the building. Studies indicate that the recommended RH should be between 40% and 60% for optimum benefits to the occupants.

Outdoor temperature

Table 2. Load Calculation Summary Sheet

Determine the moisture required in the space (Table 3)

Grains from Table 3 at space temp. ______ x Indoor RH

Determine the moisture level of incoming air (Table 4)

Grains from Table 4 at space temp. ______ x Outdoor RH

Therefore: moisture to be added: (moisture) M - A - B ______ gr/ft3 →M ______ gr/ft Determine the volume of air to be humidified. Choose the largest

value.

1. Natural ventilation: Volume x number of air changes.

2. Exhaust air: CFM x 60 min/hr

3. Make-up air: CFM x 60 min/hr Therefore: Gross humidification load = L (load) = MxC = ______ lbs/hr →L ______ lbs/hr

7,000

NOTES: 1. 7,000 grains = 1 pound

2. If HVAC system uses economizer cycle, check load using formula 6.

= A ______ gr/ft

= B ______ gr/ft

______ ft ______ ft ______ ft

/hr

/hr →C ______ ft3/hr

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Page 14 2008-10-01

Table 3. Grains of Water Per Cubic Foot – Saturated Air (100% rh)

°C °F Grains °C °F Grains °C °F Grains °C °F Grains °C °F Grains °C °F Grains

-23 -10 .29 4 40 2.86 58 5.41 76 9.75 35 95 17.28 1 14 29.34

-5 .35 41 2.97 59 5.60 77 10.06 96 17.80 115 30.13

-18 0 .48 42 3.08 16 60 5.80 78 10.40 97 18.31 49 120 34.38 8 .61 43 3.20 61 6.00 79 10.80 98 18.85 125 39.13

-12 10 .78 44 3.32 62 6.20 27 80 11.04 99 19.39 54 130 44.41

-9 15 .99 7 45 3.44 63 6.41 81 11.40 38 100 19.95 135 50.30

-7 20 1.24 46 3.56 64 6.62 82 11.75 101 20.52 60 140 56.81

-4 25 1.56 47 3.69 18 65 6.85 83 12.11 102 21.11 145 64.04

-1 30 1.95 48 3.83 66 7.07 84 12.49 103 21.71 66 150 72.00 31 2.04 49 3.97 67 7.31 29 85 12.87 104 22.32 155 80.77 32 2.13 10 50 4.11 68 7.57 86 13.27 41 105 22.95 71 160 90.43 33 2.21 51 4.26 69 7.80 87 13.67 106 23.60 165 101.00 34 2.29 52 4.41 21 70 8.10 88 14.08 107 24.26 77 170 112.60

2 35 2.38 53 4.56 71 8.32 89 14.51 108 24.93 175 125.40

36 2.47 54 4.72 72 8.59 32 90 14.94 109 25.62 82 180 139.20 37 2.56 13 55 4.89 73 8.87 91 15.39 43 110 26.34 185 154.30 38 2.66 56 5.06 74 9.15 92 15.84 111 27.07 88 190 170.70 39 2.76 57 5.23 24 75 9.45 93 16.31 112 27.81 195 188.60

94 16.79 113 28.57

(2) Formula 2

Assume our printing plant is located in Denver, Colorado. From Table 4, the worst case is -10

From Table 3:

0.29 gr/ft

°F with 37% rh

x 37% rh - 0.11 gr/ft

Combining this result with that of Moisture Required (A) we see that we will need

5.19 - 0.11 = 5.08 grains of moisture for every cubic foot of outside air brought in.

E. INCOMING AIR VOLUME

(1) The following outlines the steps necessary to determine the amount of outside air being

brought into the humidified space and the corresponding amount of moisture required. There are three basic means by which outside air is introduced into the humidified space. These are:

(a) Through natural ventilation, for example, opening and closing doors and windows,

and by infiltration through cracks and openings in the building construction.

(b) Through mechanical ventilation, for example, the introduction of make-up air, or

the exhausting of stale air by the building HVAC system.

the system.

(2) For maximum accuracy, all three should be estimated and the largest chosen.

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2008-10-01

Table 4. Design Outdoor Conditions

JANUARY

Relative Humidity

(% RH)

State City °C

Alabama Birmingham

Arizona Flagstaff

Arkansas Little R o ck -15 5 80 67 68 95 85 55 59 35 California Eureka

Colorado Denver

Connecticut New Haven -18 0 75 65 69 95 77 64 74 35 Delaware Wilmington -18 0 77 62 70 95 80 52 69 35 District of

Columbia Florida Jacksonville

Georgia Atlanta

Idaho Boise

Illinois Cairo

Indiana Fort Wayne

Iowa Davenport

Kansas Dodge City

Kentucky Louisville -18 0 78 68 69 95 77 52 57 35 Louisiana New Orleans

Maine Portland -21 -58165749078587632 Maryland Baltimore -18 07268569571526535

Massachusetts Boston -18 0 72 59 67 92 72 55 70 33 Michigan Detroit

Minnesota Duluth

Mississippi Vicksburg -12 10 82 65 67 95 87 61 70 35

Missouri Montana Billings

Nebraska North Platte

Nevada Reno -21 -58267549572252035 New HampshireConcord -26-157860699080496932

Mobile

Phoenix Yuma

Fresno Los Angeles Sacramento San Diego San Francisco

Grand Junction Pueblo

Washington -18 0 73 56 64 95 78 52 64 35

Miami

Augusta Savannah

Lewiston

Chicago Peoria

Indianapolis Terre Haute

Sioux City

Topeka

Shreveport

Grand Rapids

Minneapolis

Kansas City St. Louis

Butte

Omaha

Dry

Bulb

-12

-23

-4

-1

-4 2

-1 2 2

-23

-26

-29

-4 2

-12

-7

-23

-20

-18

-23

-18

-26

-29

-23

-7

-23

-32

-29

-23

-18

-32

-29

-23

°F

10 10

-10 25 30

30 25 35 30 35 35

-10

-15

-20

25 35

10 10 20

-10

-15

-20

-10

20 20

-10

-25

-20

-10

-25

-20

-10

7:30 A.M.

-5 0

83 75 56

87 93 63 90 76 84

54 77 67

89 87

80 84 83

82 79

81 81 83

84 83 82

78 78

85 83

82 85

78 82

78 77

67 76

80 82

1:30 P.M.

58 47 37

80 46 82 58 68

37 64 44

56 59

64 59 58

75 73

69 70 72

75 72 70

67 57

67 67

71 78

74 72

64 65

73 70

62 68

7:30 P.M.

Dry

Bulb

°F

39 27

77 66 51 70 60 70

41 64 48

75 75

69 69 72

74 71

75 77

81 78 76

72 61

6795100

73 6695100

77 80

74 75

6668100

60 71

66 73

90 105 110

90 105

90 100

7:30 A.M.

JULY

Relative Humidity

(% RH)

84 90

77 53 51

92 61 85 76 86 92

55 48 73

85 83

83 83 85

54 64

83 78 81

84 84 77

86 77

84 86

74 76

87 82

76 73

65 82

84 80

1:30

P.M.

56 64

36 31 31

36 50 46 68 75

27 27 34

57 64

57 55 61

34 37

57 51 53

53 54 50

55 45

64 56

50 51

61 54

48 50

40 36

50 51

7:30 P.M.

68 78

23 23

80 20 54 28 65 78

30 22 35

76 76

68 69 80

23 25

55 58

58 60 56

54 52

72 62

56 54

66 54

47 55

33 33

46 51

°C

35 35

32 41 44

32 41 32 38 29 29

35 35 35

35 33

35 37 35

35 35

37 35 35

35 35 35

35 35

35 38

35 35

33 35

38 35

32 35

29 35

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Page 16 2008-10-01

Table 4. Design Outdoor Conditions (cont)

JANUARY

Relative Humidity

(% RH)

74 65 68

71 78 66 79

69 69

74 79 76 75

78 78

65 68 63

76 65

76 67

69 73

52 75 62 39 73 59

74 78

70 74

73 73

Dry

Bulb

°F

95 95 95

93 93 95 95

93 95

95 95 95 95

90 90

95 95 95 95

95 95

100

95 100 100

95 100

7:30 A.M.

State City °C

New Jersey Atlantic City

Newark

Trenton New Mexico Albuquerque -18 0 68 51 46 95 59 33 28 35 New York Albany

Buffalo

New York

Rochester North Carolina Asheville

Raleigh North Dakota Bismarck -34 -30 77 71 75 95 85 52 49 35 Ohio Cincinnati

Cleveland

Columbus

Toledo Oklahoma Oklahoma City -18 0 79 62 65 101 80 49 51 38 Oregon Baker

Portland Pennsylvania Harrisburg

Philadelphia

Pittsburgh

Scranton Rhode Island Providence -18 0 73 60 67 93 79 57 73 34 South Carolina Charleston

Columbia South Dakota Huron

Rapid City Tennessee Knoxville

Memphis Texas Amarillo

Corpus Christi

Dallas

El Paso

Houston

San Antonio Utah Salt Lake City -23 -10 80 71 72 95 56 27 23 35 Vermont Burlington -23 -10 81 69 78 90 76 54 67 32 Virginia Richmond -9 15 84 60 68 95 81 57 72 35 Washington Seattle

Walla Walla West Virginia Charleston

Parkersburg Wisconsin Green Bay

Milwaukee Wyoming Cheyenne -26 -15 59 48 55 95 73 36 40 35

Province City

Alberta Calgary

Edmonton

Grande Prairie

Lethbridge

Medicine Hat British Columbia Estevan Point

Fort Nelson

Penticton

Prince George

Prince Rupert

Vancouver

Dry

Bulb

-15

-18

-23

-21

-18

-21

-18

-12

-18

-23

-21 12

-18

-21

-9

-12

-29

-18

-23

-7

-12

-7

-9

-21

-18

-23

-26

-34

-42

-36

-34

-8

-40

-18

-38

-12

-9

°F

-10

15 10

-20

-10 20 10 10 20 20

-10

-15

-29

-43

-32

-30 17

-40

-37 11 15

7:30

A.M.

5 0 0

-5 0

0 0

-5

0 0 0

-5

0 0

-5 0

79 72 73

75 79 72 81

82 82

82 81 83 79

83 87

72 74 77 80

87 81

79 71

83 82

71 88 81 63 85 82

86 80

79 82

75 76

1:30 P.M.

71 75 80 66 73

84 79 81 82 87 87

68 79 62

63 72 61 73

59 57

70 72 71 72

81 82

49 65 67 67

55 57

72 69

65 67

51 66 62 45 66 60

80 74

64 66

68 70

7:30 P.M.

JULY

Relative Humidity

(% RH)

81 75 77

79 78 75 80

88 86

84 79 78 76

69 86

78 78 80 77

88 83

86 71

83 85

77 93 79 60 90 88

86 50

88 80

85 81

1:30 P.M.

34 42 38 30 31

32 32 44 53 54 41

72 51 55

52 53 58 50

56 55

52 52 52 52

68 63

51 52 52 50

64 56

52 42

55 55

43 58 50 37 58 49

63 33

53 52

58 58

7:30 P.M.

82 65 68

64 63 68 60

73 72

60 58 60 59

36 48

62 64 63

82 68

49 40

66 59

42 68 47 30 66 45

47 22

67 65

64 64

°C

35 35 35

34 34 35 35

34 35

35 35 35 35

32 32

35 35 35 35

35 35

38 35 38 38 35 38

29 35

35 35

31 30 29 33 36

31 34 29 23 27 27

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2008-10-01

Table 4. Design Outdoor Conditions (cont)

JANUARY

Relative Humidity

(% RH)

Province City °C

Manitoba Brandon

Churchill The Pas Winnipeg

New Brunswick Campbellton

Fredericton Moncton Saint John

Newfoundland Corner Brook

Gander Goose Bay St. John’s

N.W.T. Frobisher

Resolute Yellowknife

Nova Scotia Halifax

Sydney Yarmouth

Ontario Thunder Bay

Hamilton Kaspuskasing Kingston Kitchener London North Bay Ottawa Peterborough Sioux Lookout Sudbury Timmins Toronto Windsor

Sault St. Marie P.E.I. Charlottetown -21 -6 86 84 57 29 Quebec Knob Lake

Mont Joli

Montreal

Port Harrison

Quebec City

Sept-Iles

Sherbrooke

Trois Rivieres Saskatchewan Prince Albert

Regina

Saskatoon

Swift Current Yukon Territory Dawson

Whitehorse

Dry

Bulb

-34

-40

-37

-34

-28

-27

-24

-23

-21

-32

-17

-43

-45

-18

-17

-15

-33

-18

-34

-24

-19

-18

-29

-27

-25

-36

-29

-36

-19

-16

-29

-40

-24

-27

-39

-28

-33

-28

-41

-37

-34

-49

-43

°F

-29

-40

-35

-29

-18

-16

-12

-10

-26

-45

-49

-27

-30

-11

-20

-17

-13

-33

-20

-33

-20

-40

-11

-16

-39

-19

-27

-18

-41

-34

-29

-56

-45

7:30 A.M.

-5 1

0 1 5

-3 0

-3

1:30 P.M.

73 76 77 78

77 72 82 82

84 76 85

77 71 82

83 84 83

80 75 79

84 80 77

77 78 81 79 82

79 75

76 81

77 81 76 79

76 80

7:30 P.M.

Dry

Bulb

°F

90 79 85 90

87 89 88 81

84 85 86 79

63 54 78

83 84 76

86 91 87 85 88 90 87 90 90 65 89 90 90 92 88

55 62 88

86 80 87 88

88 92 90 93

57 78

7:30 A.M.

JULY

Relative Humidity

(% RH)

1:30

P.M.

50 57 54 50

54 47 52 62

47 45 42 60

67 81 50

50 56 70

52 52 52 69 58 53 46 50 53 69 44 45 56 51 48

70 71 58

60 47 58 58

60 40

7:30 P.M.

°C

32 26 29 32

31 32 31 27

29 29 30 26

17 12 26

28 29 24

30 33 31 29 31 32 31 32 32 18 32 32 32 31 29

13 17 31

30 27 31 31

31 33 32 34

14 26

10-10

Page 18 2008-10-01

(3) Using the natural ventilation method requires knowing the volume of the humidified

space and the type of construction. A tightly constructed building will have a least one air change per hour. A loosely constructed building will have at least one and one half changes per hour, and this same building with a large a amount of incoming or exiting traffic will have at least two air changes per hour.

(a) Formula 3

Assume our print shop has a floor area of 100' large amount of traffic. This requires

100' x 100' x 20' x 2 = 400,000 ft Using our example, the moisture required is 400,000 x 5.08

_______________

7000 grains/lb

(4) Using make-up air:

(a) Formula 4

Assume our print shop has a 15,000 CFM HVAC system and uses 10% make-up air during winter. The amount of outside make-up air entering the HVAC system will, therefore, be 10% of 15,000 CFM = 1,500 CFM. The moisture required will be

1,500 x 5.08 x 60 min/hr

_________________________

7,000 grains/lb

(Refer to Figure 1.)

= 290 lbs/hr

= 65 lbs/hr

x 100' with a 20' ceiling with a

/hr.

Figure 1. Schematic of a Typical Print Shop HVAC System

10-10

Page 19

2008-10-01

(5) Using an exhaust air fan:

(a) Formula 5

Assume the print shop has a 1,000 CFM fan to exhaust a drying room. The moisture required to humidify the drying room only is

1,000 x 5.08 x 60 min/hr

_________________________

7,000 grains/lb

= 44 lbs/hr

(Refer to Figure 1.)

(6) Using an economizer cycle:

(a) Care should be taken in sizing humidification load when an economizer cycle is

incorporated into a building HVAC system. The purpose of an economizer cycle is to provide building cooling using outside air, rather then the building refrigeration system when outside air conditions permit.

(b) The economizer cycle senses and compares outdoor air temperature and return

air temperature during the cooling season.

enough – typically 55°F or lower – the outside air and exhaust air dampers are positioned to provide the required supply air temperature to maintain cooling, and the recirculated air damper is positioned to maintain the required supply air volume. When the outdoor air temperature is higher than the supply air temperature required to maintain cooling but is lower than the return air temperature, the make-up air and exhaust air dampers are 100% open. The recirculation air damper closes, and the building refrigeration system provides the portion of cooling load that cannot be provided by outside air intake.

(d) From this it can be seen that it is possible to introduce 100% outside air into a

building during the cooling season.

(e) Formula 6

For example, if out print shop were using 100% outdoor air at 55°F and 40% rh, then the moisture required is

5.19 - (4.89 x 40% rh) = 3.23 gr/ft

Therefore, on a 15,000 CFM system, the humidification load will be 15,000 x 3.23 x 60 min/hr

__________________________

7,000 grains/lb

= 415 lbs/hr

(f) In the above examples, the largest humidification load was due to the economizer

cycle at 415 lbs/hr.

(7) Using cooling or refrigeration loads:

(a) As air is cooled, it loses it’s ability to hold moisture. If it is cooled enough, some of

the moisture will condense out. This is known as cooling load. Cooling load calculations can be important for process applications or refrigeration applications to product dehydration.

10-10

Page 20 2008-10-01

(b) Formula 7

Assume that during the summer the HVAC system is in the cooling mode. The air leaving the cooling coil is at 55°F and 90% rh. In order to maintain the desired 47% rh in the space, moisture must be added using the following formula:

Desired space 80°F 47% rh= 5.19 gr/ft

(Formula 1)

55°F 90% = 4.89 x 0.90 = 4.40 gr/ft

________________________ __________

Grains to add = 0.79 gr/ft3

15,000 x 0.79 x 60 min/hr

_________________________

7,000 grains/lb

= 101.57 lbs/hr

(8) In considering Process and Environment, in Tables 5 through 7 you will find conditions

and processes that may affect your calculation and should be addressed. (a) Table 5 shows the outdoor temperature at which the rh would cause condensation

on the windows to the outside. Should your outdoor conditions make this a possibility, an outdoor setback sensor may be a solution.

(b) Table 6 describes the moisture gain of various material and if your process or

environment includes a great amount of these materials that are constantly introduced to the area, its affects must be considered.

processes, these can be of use when deciding what conditions would be most beneficial in your application.

(d) In Figure 2, you will find the ASHRAE physchrometric chart describing the

enthalpy of dry air and the effects to and from rh in the air.

Table 5. Inside Relative Humidities At Which Moisture Will Condense On Windows

Outside

T emperature

°F °C

Single Windows, Still Air Single Windows, Wind

-50-4599988-50-4543332

-40-401212111010-40-4054443

-30-341614141313-30-3476665

-20 -29 20 18 18 17 16 -20 -29 10 9 9 8 7

-10 -23 25 23 22 21 20 -10 -23 14 13 12 11 10

0 -18 32 29 27 25 24 0 -18 20 18 16 15 13 10-12393633312910-122824222018 20 -7 47 43 40 37 35 20 -7 36 32 30 26 24 30 -1 57 52 50 45 42 30 -1 48 41 38 34 30 40 4 70 63 60 53 50 40 4 62 54 49 43 40

NOTE: Bold areas indicate that moisture will be in the form of frost on windows.

Inside Temperature (°F/°C)

60/

15.5

65/

18.3

70/

75/

23.8

80/

26.6

Outside

Temperature

°F °C

Inside Temperature (°F/°C)

60/

15.5

65/

18.3

70/

75/

23.8

80/

26.6

10-10

Page 21

2008-10-01

Table 5. Inside Relative Humidities At Which Moisture Will Condense On Windows (cont)

Outside

T emperature

°F °C

Double Windows, Still Air Double Windows, Wind

-50 -45 34 34 34 33 32 -50 -45 23 26 26 26 25

-40 -40 38 38 36 36 35 -40 -40 32 30 30 29 28

-30 -34 42 42 41 40 38 -30 -34 36 34 34 32 31

-20 -29 47 46 46 44 42 -20 -29 41 39 38 35 35

-10 -23 52 50 49 48 46 -10 -23 46 45 42 42 39 0 -18 57 55 55 52 50 0 -18 52 49 47 46 44

10 -12 62 60 59 57 54 10 -12 58 56 53 52 49 20 -7 69 66 63 62 59 20 -7 65 63 59 58 54 30 -1 76 73 71 68 65 30 -1 72 70 66 64 60 40 4 84 80 79 74 71 40 4 80 78 73 70 67

NOTE: Bold areas indicate that moisture will be in the form of frost on windows.

Inside Temperature (°F/°C)

60/

15.5

65/

18.3

70/

75/

23.8

80/

26.6

Outside

Temperature

°F °C

Inside Temperature (°F/°C)

60/

15.5

65/

18.3

70/

75/

23.8

80/

26.6

Table 6. Regain of Hygroscopic Materials

Industry Materials

Baking Crackers

Flour

White Bread Leather Sole Oak, Tanned 5.0 8.5 11.2 13.6 16.0 18.3 20.6 24.0 29.2 Printing Paper – Comm. Ledger – 75% Rag

1% Ash Paper M.F. Newsprint – 24% Ash Paper White Bond Rag – 1% Ash Paper Writing – 3% Ash

Textile Cotton – Absorbent

Cotton – American-cloth Cotton – Sea Isle-roving Hemp – Manila and Sisal Jute – Average Grade Linen – Dried Spun – Yarn Rayon – Celulose – Acetate – Fibre Rayon – Cupramonium – Average

Skein Rayon – Viscose Nitrocel Silk – Raw Chevennes-Skein Wool – Australian-Marino-Skein

Tobacco Cigarette 5.4 8.6 11.0 13.3 16.0 19.5 25.0 33.5 50.0 Wood Timber – Average

Glue – Hide

Miscellaneous Charcoal-Steam Activated

Gelatin Silica Gel Soap Starch

NOTE: Moisture content expressed in per cent of dry weight of the substance at various relative humidities –

Temperature 75°F.

10 20 30 40 50 60 70 80 90

2.1

2.8

2.6

4.1

0.5

1.7

3.2

4.2

2.1

3.2

2.4

3.7

3.0

4.2

9.0

4.8

3.7

2.6

3.7

2.5

4.7

2.7

5.2

3.1

5.4

3.6

1.1

0.8

5.7

4.0

5.7

4.0

5.5

3.2

7.0

4.7

3.0

4.4

3.4

4.8

7.1

14.3

0.7

1.6

5.7

9.8

1.9

3.8

2.2

3.8

Relative Humidity - %

3.3

3.9

5.0

5.3

6.5

4.5

5.6

4.7

5.5

6.2

5.2

5.6

7.2

8.5

7.3

1.9

7.9

8.0

7.6

6.6

3.8

7.6

6.4

8.0

6.2

6.1

6.5

7.2

18.5

5.9

6.6

8.5

10.2

8.1

2.4

9.2

8.9

12.8

9.3

7.6

28.3

4.9

17.2

10.0

7.4

3.1

5.0

4.0

4.7

5.2

12.5

4.4

4.6

6.0

6.9

6.5

1.4

6.8

6.9

8.9

5.9

5.8

22.8

2.8

12.7

5.7

5.2

15.7

10.8

26.2

15.2

6.5

9.9

8.5

6.9

7.2

7.5

8.3

20.8

6.8

7.9

9.9

12.2

8.9

3.0

10.8

10.2

14.9

11.3

9.0

29.2

6.1

18.6

12.9

8.3

12.4

11.1

8.1

8.7

8.8

9.9

22.8

8.1

9.5

11.6

14.4

9.8

3.6

12.4

11.9

17.2

14.0

10.7

30.0

7.6

20.2

16.1

9.2

10.9

15.4

14.5

10.3

10.6

10.8

11.9

24.3

10.0

11.5

13.6

17.1

11.2

4.3

14.2

14.3

19.9

17.5

11.8

31.1

9.3

21.5

19.8

10.6

14.9

19.1

19.0

13.9

13.2

14.2

25.8

14.3

14.1

15.7

20.2

13.8

5.3

10.0

16.0

18.8

23.4

22.0

12.5

32.7

11.4

22.6

23.8

12.7

10-10

Page 22 2008-10-01

Table 7. Design Indoor Conditions For Various Places, Products and Processes

Product and/or Process

Abrasives Manufacturing 78 25 50 Bowling Alleys 73 – 75 23 – 24 50 – 55 Billiard Rooms 73 – 75 23 – 24 40 – 50 Bread

Flour and Powdered Product Storage Fermentation (Bread Dough) Retarding of Doughs Final Proof Counterflow Cooling

Brewing

Hop Storage Yeast Culture Room

Candy

Chocolate Pan Supply Air Enrober Room Chocolate Cooling Tunnel Supply Air Hand Dippers Moulded Goods Cooling Chocolate Packing Room and Finished Stock Storage Centers Tempering Room Marshmallow Setting Room Grained Marshmallow (deposited in starch) Drying Gum (deposited in starch) Drying Sanded Gum Drying Gum Finished Stock Storage Sugar Pan Supply Air (engrossing) Polishing Pan Supply Air Pan Rooms Nonpareil Pan Supply Air Hard Candy Cooling Tunnel Supply Air Hard Candy Packing Hand Candy Storage Caramel Rooms

Raw Material Storage Nuts (insect) Nuts (rancidity) Eggs Chocolate (flats) Butter Dates, Figs, etc. Corn Syrup Liquid Sugar Comfort Air Conditioners

Ceramics Refractory Molding Room Clay Storage Decalcomania Production and Decorating room Cereal Packaging

Cheese Curing Cheddar Swiss Blue Brick Limburger Camembert

Temperature

°F °C

70 – 80

32 – 40

95 – 120

29 – 32

55 – 62 80 – 85 40 – 45

40 – 45

65 75 – 80 75 – 78

110

125 – 150

100

50 – 65

85 – 105

70 – 80 75 – 80

100 – 120

60 – 70 70 – 75 50 – 70 70 – 80

45 34 – 38

20 40 – 45

90 – 100

75 – 80 75 – 80

110 – 150

80 60 – 80 75 – 80 75 – 80

45 – 55

60 48 – 50 60 – 65 60 – 65 53 – 59

21 – 27

0 – 4

35 – 49

2 – 0

13 – 17 27 – 29

4 – 7

18 24 – 27 24 – 26

43 52 – 66

38 10 – 18 29 – 41 21 – 27 24 – 27 38 – 49 16 – 21 21 – 24 10 – 21 21 – 27

1 – 3

-1

-7

4 – 7 32 – 38 24 – 27 24 – 27

43 – 66

27 16 – 27 24 – 27 24 – 27

7 – 13

9 – 10 16 – 18 16 – 18 12 – 15

Relative

Humidity

%RH

60 75

85 85 – 90 80 – 85

50 – 60

80 45 – 55

25 – 30 70 – 85

45 70 – 85

50 30 – 35 40 – 45

40 15 – 25 25 – 40

65 20 – 30 40 – 50 30 – 35

20 40 – 55 35 – 40

40 65 – 75

65 – 75 85 – 90

50 65 – 75

– 30 – 40 50 – 60

50 – 90 60 – 70 35 – 65

45 – 50 85 – 90

80 – 85

95 90 95 90

10-10

Page 23

2008-10-01

Table 7. Design Indoor Conditions For Various Places, Products and Processes (cont)

Product and/or Process

Clean Rooms – Computer Rooms

Computer Room Clean Room – General Clean Room – Critical

Distilling

Grain Storage General Manufacturing Aging

Electrical Products Coil and Transformer Winding X-ray Tube Assembly Instruments Manufacture and Laboratory Thermostat and Humidistat Assembly and Calibration Close Tolerance Assembly Meter Assembly and Test Fuse and Cutout Assembly, Capacitor Winding and Paper Storage Conductor Wrapping with Yarn Lightning Arrestor Assembly Thermal Circuit Breaker Assembly and T est Water Wheel Generators

Thrust Runner Hopping Processing Selenium and Copper Oxide Plates

Fruit Storage

Apples Apricots Grapefruits (California) Grapefruits (Florida) Grapes (Eastern) Grapes (Western) Lemons Oranges (California) Oranges (Florida) Peaches and Nectarines Plums Specialty Citrus Fruit

Fur Storage 40 – 50 4 – 10 55 – 65 Gum

Manufacture Rolling Stripping Breaking Wrapping

Hospitals Operating, Cystoscopic and Fracture Rooms Patient Rooms Intensive Care Unit Administrative and Service Areas

Leather

Drying Storage, Winter Room Temperature

Lenses (Optical)

Fusing Grinding

Temperature

°F °C

70 – 80 70 – 74

71.5 – 72.5

0 – 75

65 – 72

72 68 70 76 72 76 73 75 68 76

70 74

30 – 40 31 – 32 58 – 60

50 31 – 32 30 – 31 58 – 60 40 – 44 32 – 34

31 30 – 32 38 – 40

68 – 76

75 70 – 80

70 – 120

50 – 60

21 – 27 21 – 23

22 – 22.5

16 16 – 24 18 – 22

-1– 4

-1 – 0

14 – 16

-1 – 0

-1

14 – 16

4 – 7 0 – 1

-1

-1 – 0 3 – 4

25 20 22 23 23

20 – 24

24 24

21 – 27

21 – 49 10 – 16

27 27

Relative

Humidity

%RH

40 – 60 40 – 60 43 – 47

35 – 40 45 – 60 50 – 60

40 50 – 55 50 – 55 40 – 45 60 – 63

50 65 – 70 20 – 40 30 – 60

30 – 50 30 – 40

90 90 – 95 85 – 90 85 – 90

85 90 – 95 86 – 88 85 – 90 85 – 90

90 90 – 95 90 – 95

50 40 – 50

40 30 – 50

75 40 – 60

10-10

Page 24 2008-10-01

Table 7. Design Indoor Conditions For Various Places, Products and Processes (cont)

Product and/or Process

Libraries and Museums

Normal Reading and Viewing Rooms Rare Manuscript Storage Vaults Art Storage Areas

Matches

Manufacture Drying Storage

Meat and Fish

Beef (Fresh) Beef, Fish, Lamb and Pork (Frozen) Fish (Fresh) Lamb and Pork (Fresh)

Mushrooms

Sweating-out Period Spawn Added Growing Period Storage

Oil Paints: Paint Spraying 60 – 90 16 – 32 80 Pharmaceuticals

Manufactured Powder Storage and Packaging Area Milling Room, Table Compressing and Coating Effervescent Tablets and Powders Hypodermic Tablets Colloids Cough Drops Glandular Products Ampoule Manufacturing Gelatin Capsules and Storage Microanalysis Biological Manufacturing and Liver Extracts Serums Animal Rooms

Plastics

Manufacturing Areas Thermosetting Molding Compounds Cellophane Wrapping

Plywood

Hot Pressing (Resin) Cold Pressing

Printing

Platemaking Lithographic Press Room Letterpress and Web Offset Press Rooms and Paper Storage Paper Storage (Multicolor Sheet Feed Lithography)

Rubber Dipped Goods Cementing Dipping Surgical Articles Storage Prior to Manufacture Laboratory (ASTM Standard)

Tea Packaging 65 18 65

Temperature

°F °C

70 – 74 70 – 72 65 – 72

72 – 74 70 – 75 60 – 62

32 –34

-10 – 0 33 – 35 32 – 34

120 – 140

60 – 75 48 – 60 32 – 35

75 75 75 75 70 80 76 75 76 76 76 76

75 – 80

90 90

75 – 80 76 – 80 76 – 80 76 – 80

80 75 – 90 60 – 75

73.4

21 – 23 21 – 22 17 – 22

22 – 23 21 – 24 16 – 17

0 – 1

-23 – -18 1 – 3 0 – 1

49 – 60 16 – 24

9 – 16

0 – 2

24 24 24 24 21 27 24 24 24 24 24 24

24 – 27

32 32

24 – 27 24 – 27 24 – 27 24 – 27

27 24 – 32 16 – 24

Relative

Humidity

%RH

40 – 50

45 50

50 60 50

88 – 92 90 – 95 90 – 95 85 – 90

–

Nearly Sat.

80 – 85

35 35 20 30

30 – 50

5 – 10

35 – 50

35 50 35 50 50

35 – 30 45 – 65

15 – 25

45 Max 43 – 47

5 – 8

Higher than

Press Room

25 – 30 25 – 30 40 – 50

10-10

Page 25

2008-10-01

Table 7. Design Indoor Conditions For Various Places, Products and Processes (cont)

Product and/or Process

Textiles

Opening and Picking

Cotton Man-Made

Carding

Cotton Wool Man-Made

Silver and Ribbon Lapping

Cotton Man-Made

Combing

Cotton Wool Man-Made

Drawing

Cotton and Wool Man-Made

Roving

Cotton Man-Made

Spinning

Cotton Wool Man-Made

Winding and Spooling

Cotton Wool Man-Made

Twisting

Cotton Man-Made

Warping

Cotton Wool Man-Made

Knitting

Cotton Man-Made

Weaving

Cotton Wool Man-Made

Tobacco

Cigar and Cigarette Making Softening Stemming and Stripping Filler Tobacco Casing and Conditioning Filler Tobacco Storage and Preparation Wrapper Tobacco Storage and Conditioning

Temperature

°F °C

75 – 80 70 – 75

75 – 80 75 – 80 70 – 75

75 – 80 70 – 75

75 – 80 75 – 80 70 – 75

75 – 80 70 – 75

75 – 80 75 – 80 70 – 75

75 – 80 70 – 75

75 – 80 75 – 80 70 – 75

76 76

75 – 80 75 – 80 70 – 75

70 – 75

75 – 85

75 78 75

24 – 27 21 – 24

24 – 27 24 – 27 21 – 24

24 – 27 21 – 24

24 – 27 24 – 27 21 – 24

24 – 27 21 – 24

24 – 27 24 – 27 21 – 24

24 – 27 21 – 24

24 – 27 24 – 27 21 – 24

24 24

24 – 27 24 – 27 21 – 24

21 – 24

24 – 29

24 26 24

Relative

Humidity

%RH

55 – 70 50 – 55

50 – 55 60 – 70 50 – 60

55 – 60 55 – 65

55 – 65 65 – 75 55 – 65

50 – 60 50 – 60

35 – 60 50 – 55 50 – 65

55 – 65 55 – 60 60 – 65

50 – 65 50 – 65

55 – 70 50 – 65 50 – 65

60 – 65 50 – 60

70 – 85 50 – 60 60 – 70

55 – 65 85 – 88 70 – 75

75 70 75

10-10

Page 26 2008-10-01

Figure 2. Psychrometric Chart

10-10

Page 27

2008-10-01

2. STEAM ABSORPTION AND DISTRIBUTION

A. VARIABLES THAT AFFECT ABSORPTION DISTANCES

(1) This manual will help in the design of a steam distribution system to provide the

optimum performance from the humidifier and absorption of steam within the duct system.

(2) Experience has shown that absorption of steam is affected primarily by the

psychrometric conditions of the air based on how much residual capacity at a given air volume and temperature exist to hold the moisture being introduced.

(3) To properly introduce steam into an air stream, five variables must be known:

(a) Temperature (°F or °C). If the air temperature varies, pick the lowest temperature. (b) Highest humidity level before the distributor (%rh). (c) The amount of moisture being added resulting in a change of rh in the duct or

plenum ( (d) Minimum velocity of the air (FPM). (e) The size of the duct or plenum (cross section area).

(4) As a guide, Table 8 shows how each variable affects the absorption distance. (5) Table 9 shows examples of typical absorption distances in air handling systems. (6) Referring to Figure 3, ‘D’ can vary between 1 to 20 feet depending on the airflow’s:

Δ %rh).

(a) Velocity (V) (b) Temperature (T) (c) Humidity (H)

(7) When (V) is 500 fpm, (T) is high (90 to 130°F) and (H) is low (10% to 30% rh) the ‘D’ will

be 1 to 2 feet. As the (H) goes up ‘D’ becomes longer. Similarly, as (T) goes down, ‘D’ goes up. High velocity also increases ‘D’ by moving the steam further down stream before it can mix. Multiple distributors will shorten the steam absorption distance.

Table 8. Variables That Affect Absorption Distances

Variables

Air Temperature ↑ Air Temperature ↓

Air Humidity ↑

Air Humidity ↓ Large Increase of RH Small Increase of RH

High Air Velocity (1000 fpm or above)

Low air Velocity (between 100 and 500 fpm)

Small Duct or Plenum (short distributor)

Large Duct or Plenum (long distributor)

Effect On Absorption Distance

(NOTE: ↑ Increase ↓ Decrease

↓ ↑ ↑ ↓ ↑ ↓ ↑ ↓ ↑ ↓

10-10

Page 28 2008-10-01

Table 9. Typical Absorption Distances, Single Distributor, 100 lbs/hr Humidifier

FPM °F °C % RH FT CM

(V) (T) (H) (D)

500 70 21 30 3.0 91 Air handler before coils 500 5 5 13 80 4.5 137 Air handler after cooling 900 7 0 21 30 3.5 107 Supply air duct, on cool, no heat

900 55 13 70 6.0 183 Supply air duct, on cool 1000 55 13 90 8.0 244 Supply air duct, on cool with high humidity 1000 110 43 10 2.5 76 Supply air duct, on heating with low humidity 1000 70 21 45 4.0 123 Return air duct conditions 2000 55 13 45 10.0 305 Supply air duct higher pressure system 5000 140 60 10 2.0 61 After operating heating coil

(V) = Velocity at distributor location (T) = Temperature at distributor location (D) = Absorption distance (visible steam) (H) = Humidity level after steam is absorbed

NOTE: This chart is for reference only; multiple distributors can reduce absorption distances.

T ypical System

Figure 3. Steam Distributor Location

10-10

Page 29

2008-10-01

B. CALCULATING THE DOWN STREAM HUMIDITY LEVEL

(1) Table 10 indicates the amount of water that each 1000 CFM of duct air holds in pounds

of water per hour at various combinations or air temperature and relative humidity. Subtract the water vapour in the duct air before the steam distributor from the maximum allowed after the distributor. The chart indicates how many lbs/hr of water can be added to 1000 CFM of airflow.

Table 10. Water (lbs/hr) Contained in 1000 CFM of Air

°F 10% 20% 30% 40% 50% 60% 70% 80% 85%

50 3.52 7.04 10.56 14.06 17.60 21.12 24.65 26.16 29.92 55 4.19 8.38 12.57 16.76 20.95 25.14 29.33 33.52 35.62 60 4.97 9.94 14.91 19.88 24.85 29.82 34.79 39.76 42.25 65 5.85 11.74 17.61 23.48 29.35 35.22 41.09 46.96 49.73 70 6.94 13.80 20.82 27.78 34.70 41.64 48.58 55.52 58.99 75 8.10 16.20 24.30 32.40 40.50 48.60 56.70 64.80 68.85 80 9.46 18.92 28.36 37.84 47.30 56.76 66.22 75.68 80.41 85 11.03 22.08 33.09 44.12 55.15 66.18 77.21 88.24 93.75 90 12.80 25.60 38.40 51.20 64.00 76.80 89.60 102.4 108.80 95 14.81 29.62 44.43 59.24 74.05 88.86 103.67 118.48 125.89

100 17.10 34.20 51.20 68.40 85.50 102.60 119.60 136.80 145.54

(2) The following are two examples:

Example 1:

3000 CFM air handler with 60°F and 30% rh air before the steam distributor. Calculate the maximum rate of steam addition without exceeding 80% rh in the duct. 60° & 80% = 39.76 lbs/hr 60° & 30% = 14.91 lbs/hr

____________________

24.85 lbs/hr can be added to 1000 CFM

x 3 (3000CFM)

____________

74.55 lbs/hr can be added to 3000 CFM

If the load calculation of this system requires a 100 lbs/hr unit, then due to the above possible conditions, the project requires a modulating high limit humidistat to limit the humidifier output to a maximum of 74 lbs/hr and maintain 80% rh.

Example 2:

Humidification load is 30 lbs/hr. To avoid exceeding 80% rh in the duct, calculate the minimum allowable CFM at 55°F. Duct conditions are 55°F and 50% rh.

55° & 80% = 33.53 lbs/hr 55° & 50% = 20.95 lbs/hr

____________________

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12.57 lbs/hr can be added to 1000 CFM

(30 lbs/hr ÷ 12.57) x 1000 = 2386 CFM minimum

NOTE

Maximum capacity of the NHTC/NHPC humidifier can be limited through the keypad.

C. CONTROL OF DUCT OR PLENUM SATURATION

(1) NORTEC always recommends the use of a high limit humidistat set at 85% relative

humidity in combination with an air-proving switch to assure air movement. Both of these controls are wired in series across the primary control terminals of the humidifiers so that should either of these conditions not be satisfied the hu midifiers cannot operat e.

(2) Low temperature, shallow ducts or branch ducts might require a field supplied

condensate drain pan and should be accessible to service and inspection (See Figure 4.).

(3) The most effective method of ensuring controlled absorption distances is to install a

modulating high limit humidistat. By controlling the down stream [after distributor(s)] humidity levels and modulating the humidifier’s output, one of the variables affecting absorption distance is now a constant. NORTEC recommends modulating high limit humidistats on all economizer systems, VAV, VVT, and systems, which are primarily cooling.

Figure 4. Condensate Drain Pan

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3. STEAM RUNS AND CONDENSATE RETURNS

A. STEAM RUNS

(1) Steam runs between the humidifier and the distributors can be accomplished by using

flexible NORTEC steam hose or insulated copper pipe. The longer the steam run, including elbows, the lower the efficiency of the system. The more elbows and turns, the higher the losses become. The humidifier should be as close as possible to the distributor and the steam run should be as direct as possible.

(2) Guidelines for installation are:

(a) Locate humidifier as close as possible to the duct system. (b) NORTEC steam hose should only be used on short steam runs below 10 feet. (c) Minimize elbows and turns. (d) Ensure that no condensate produced in the steam line will remain trapped. Steam

naturally flows upward and condensate naturally flows downward. Always slope the steam run towards the steam source at a 15°

(e) Oversize condensate line and steam line of long runs (consult your

representative).

(f) See material recommended for use in Table 11. To eliminate corrosion, NORTEC

does not recommend the use of steel piping.

(g) Consult Table 12 and Table 13 for steam and condensate sizing guidelines when

using steam distributors.

pitch no more (See Figure 5.).

Figure 5. Proper Slope

see Fig 9 for proper P Trap design and installation

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Figure 6. Drain Tee

Table 11. Steam Line Material

Steam Hose Copper Tube Stainless Steel Tube

Short run < 10 feet (3 m) yes yes yes Long run > 10 feet (3 m) yes yes NOTE: Steel, Iron and aluminum tubing or pipe must not be used for the steam distribution lines with these humidifiers.

Plastic tubing and pipe also must not be used for steam distribution lines.

Table 12. Recommended Material and Size for Steam Run

Load Steam Run

lb/hr kg/hr ft m

0-30 0-13 0-10 0-3 Copper Tube ¾" MED-L

0-30 0-13 10 + 3 + Copper Tube 1"MED-L Tubing

0-30 0-13 0-10 0-3 Stainless Steel

0-30 0-13 10 + 3 + Stainless Steel

30-100 13-45 0-20 0-6 Copper Tube 1½" MED-L

30-100 13-45 20 + 6 + Copper Tube 2"MED-L Tubing

30-100 13-45 0-20 0-6 Stainless Steel

30-100 13-45 20 + 6 + Stainless Steel

NOTE: Options shown in a 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.

NOTE: Insulate all copper or stainless steel steam lines with minimum one inch high temperature insulation.

Steam Line

Material

Tube

Steam Line

Description

Tubing (f" OD)

(1c" OD)

f" Tube x

0.049" thick.

1c"Tube x

0.049” thick.

Tubing (1e"

OD)

(2c"OD)

1¾" Tube x

0.065" thick.

2" Tube x

0.065" thick.

Table 13. Recommended Condensate Line at Distributor(s)

Dispersion Method Condensate Hose Copper Tube Stainless Steel Tube

1 x Steam Distributor d" NORTEC 1328840 ¼" MED-L Tubing (d"

3 x Steam Distributor* d" NORTEC 1328840 ½" MED-L Tubing

NOTE: When using more than one distributor, the condensate line should be trapped before it is joined together.

OD)

" OD)

d" Tube 0.049" thick.

e" Tube 0.049" thick

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(3) NORTEC recommends the use of insulated hard copper steam lines on distances of

more than 10 feet and no more than 3 elbows (90

⊃). The use of flexible steam hose on

runs of more than 10 feet can reduce these recommended distances in Table 14 by as much as 25%. Steam hose can crimp and cause back pressure.

Table 14. Maximum Recommended Length of Steam Runs

Unit Size Steam Output Distance Possible Losses

NH-005 5 lbs/hr 8 feet 1.0 lbs/hr NH-010 10 lbs/hr 15 feet 1.5 lbs/hr NH-020 20 lbs/hr 20 feet * 2.0 lbs/hr NH-030 30 lbs/hr 25 feet * 2.5 lbs/hr NH-050 50 lbs/hr 40 feet ** 4.0 lbs/hr NH-075 75 lbs/hr 50 feet ** 5.0 to 10.0 lbs/hr NH-100 100 lbs/hr 50 feet ** 5.0 to 10.0 lbs/hr NH-150 150 lbs/hr 50 feet/cylinder ** 5.0 to 10.0 lbs/hr NH-200 200 lbs/hr 50 feet/cylinder ** 5.0 to 10.0 lbs/hr

* Use one inch copper steam supply for longer runs.

** Use two inch copper steam supply for longer runs.

NOTES: 1. This table gives the maximum recommended length of steam run by unit size.

2. The use of any steam line other than copper or NORTEC supplied steam hose will void the warranty and may adversely effect the operation of the humidifier.

(4) Steam lines should slope upwards from the humidifier to the steam distributor. (See

Figure 7.)

(5) Flexible steam hose, if used, must be supported to avoid crimps, bends, and sags.

(Please consult local agent if proper slopes are not available.)

(6) If the steam supply line must be routed below the humidifier location, a condensate trap

‘tee’ will be required to prevent blockage at the low point in the steam line. Run the condensate hose to the nearest floor drain after trapping. (See Figure 8.)

(7) Long steam runs with improper slopes can produce spitting at the distributor because

the steam is travelling at a high velocity and will push condensate out the distributor. If a slope of 2" for every 12" of steam run cannot be achieved, then condensate must be removed before the distributor. (See Figure 4.)

B. CONDENSATE RETURN

(1) Each steam distributor has a built-in condensate return. (See Figure 9.) Flexible

condensate return hose (available from NORTEC) is recommended for routing condensate back into the humidifier’s fill cup, or to a drain. A short length of d" OD copper tubing is supplied by NORTEC when routing condensate hose back to the fill cup. Similarly, a short length of d" condensate hose is supplied to serve as a flexible coupling with field-supplied copper condensate line. Long condensate runs should be drained to a floor drain to prevent excessive condensate water from entering the cylinder.

NOTE

Excessively long steam runs (over 20 feet) may require the use of ½" OD condensate return lines – supplied by others.

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(2) Use vertical condensate leg of

distributor only. Do not over-tighten clamp.

(3) Drip stations on steam mains must

be located at all low points in the system, at each elevation change and or directional change.

(4) Horizontal runs of steam must

have a 2" rise per foot (10°) when flow is going away from drip station and the steam run is to fall ½" per foot (2°) when flow is going towards drip station.

(5) In a horizontal run of the steam

main, drip stations must be located at regular intervals of 20 feet.

(6) The drip station itself is a section

of piping connected to the bottom of the main. A full size tee must be used to create a drip station to allow the condensate to fall in the drip station.

Figure 7. Steam Line Connection

Figure 8. Condensate Tee At Any Low Point

In Steam Line

Figure 9. Trap To Prevent Steam In

Condensate Line

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(7) Vertical drop of the drip station should be 1.5 times the diameter of the steam main but

no less then 12".

(8) Install the P trap at the botom of the drip station. The P trap height is to be a minimum

of 6 inches or 2 “ greater than the static pressure in the duct.

(9) All distributors must be individually trapped.

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4. STEAM DISTRIBUTORS (ASD, BSD, CSD)

A. STEAM DISTRIBUTORS

(1) NORTEC’s steam distributors, in use for over twenty years, are a proven design to suit

applications for the introduction of atmospheric steam.

(2) Features and benefits of steam distributors are:

(a) Expanded diameter of tube to reduce steam velocity and the potential for

condensate carryover into the duct. (b) Positive removal of condensate. (c) Lower mass of metal (stainless steel), which reduces ‘radiator effect and

condensate’ and results in higher efficiency of humidifier output while reducing

condensate formation. (d) Designed specifically for atmospheric steam generation. (e) Modular so that the exact quantity of distributors can be configured to meet

specific application requirements. This reduces system complexity and installation

costs.

B. DISTRIBUTOR CHARACTERISTICS

(1) NORTEC steam distributors are constructed of stainless steel and include in low point

condensate return to prevent the condensate from collecting in the steam distributor. This enables entrained condensate to settle to the bottom of the steam distributor where it is removed by the condensate return. These features allow the NORTEC steam distributors to be installed level in the duct, thereby utilizing the full available width of the duct. (See Figure 10.)

Figure 10. Levelling the Distributor

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(2) Ensure the total capacity of the humidifier is not higher than the allowable maximum

steam capacity of the following distributors: (a) ASD: 25 lbs/hr (9 kg/hr) (b) BSD: 35 lbs/hr (13 kg/hr) (c) CSD: 115 lbs/hr (45 kg/hr)

C. DISTRIBUTOR LOCATIONS AND MOUNTING

(1) NORTEC distributors can be mounted in air handlers, supply air ducts or return air

ducts. Return air ducts should only be considered if all of the return air enters the building again and is not exhausted by the air handling device. Distributors should be mounted center or low within the duct or plenum. (See Figure 11.) Laminar airflow is best. Down stream obstruction must be considered. The non-absorbed steam may affect devices like smoke detectors down stream. Total steam absorption must be accomplished before filters and silencers.

(2) Distributors come complete with a mounting plate. (See Figure 12.) Most ducts and

plenums are rigid enough to support the distributor.

(3) Longer distributors (more than 36") and distributors mounted on lighter gage sheet

metal which cannot support the distributor level in the duct will need to b e supported on the end. (See Figure 10.)

D. MULTIPLE DISTRIBUTOR APPLICATIONS

(1) The use of multiple steam distributors can reduce the absorption distance in most

situations. Distributors can be manifolded together to create a grid to achieve shorter absorption distances. (Consult agent and/or see Nomogram Figure 13.

CAUTION

THESE INSTALLATION GUIDELINES APPLY FOR DUCT VELOCITIES UNDER 2000 FT/ MIN (610 M/MIN), PLEASE CONSULT FACTORY FOR HIGHER VELOCITIES

CAUTION

PLEASE MAKE SURE NO OBSTACLES (ELBOW, FILTER, OR DIFFUSER) ARE LOCATED AFTER THE DISTRIBUTOR IN THE DIRECTION OF THE AIRFLOW CLOSER THAN THE ABORPTION DISTANCE CALCULATED FOR YOUR APPLICATION.

CAUTION

FOR APPLICATIONS WITH HIGH STATIC PRESSURES PLEASE CONSULT FACTORY

Figure 11. Single Steam Distributor

Installation – Minimum Clearance

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Figure 12. Cutting Duct For Mounting

Figure 13. Humidification Distance Nomogram

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CAUTION

UNLESS YOU KNOW THE EXACT ABORPTION DISTANCE REQUIRED FOR THE STEAM ABSORPTION INTO THE AIR STREAM, THE DISTRIBUTOR SHOULD BE LOCATED AT LEAST 8-10 FT (2-3 M) AWAY FROM ANY OBSTACLE IT MAY CONDENSE ON (ELBOW, DIFFUSER, FILTER, ETC.)

(2) Duct vertical clearance requirements for standard steam distributors are as follows:

(a) ASD - 8 in. vertical duct height for 1st ASD

- 5.5 in. additional duct height for each additional ASD = ROUNDDOWN (‘DuctHeight’ - 8")/5.5) + 1

(b) BSD - 10 in. vertical duct height for 1st BSD

- 6.375 in. additional duct height for each additional BSD = ROUNDDOWN (‘DuctHeight’ - 10")/6.375) + 1

- 9 in. additional duct height for each additional CSD = ROUNDDOWN (‘DuctHeight’ - 14")/9) + 1

NOTE

These requirements apply to vertical arrangements of multiple distributors ONLY. Diagonal arrangements utilize an alternative method.

E. LOCATION OF STEAM DISTRIBUTORS WITHIN AN AIR HANDLER

(1) Humidify after the heating

coil (H/C) so that absorption will occur in the 3 to 4 feet before the cooling coil (C/C). If steam carries over and condenses on the coil, any excess water will be drained away. There is little chance of condensation on the blower, blower motor, or fan isolation components, especially if you use a modulating high limit humidistat. All steam distributors should be 8" from the H/C and evenly spaced. If wetting is a problem, add more steam distributors. (See Nomogram Figure 13 and Figure 14).

F. DISTRIBUTOR ABSORPTION

DISTANCE

(1) The water vapor discharged from

the steam distributor must be adequately mixed with air to prevent condensation on downstream components. The nomogram in figure 13 will

Figure 14. Best Location for Multiple Steam

Distributors in AHU

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determine the number of steam distributors that must be use for short saturation distances.

(2) If the ‘Saturation Distance’ for one steam distributor is not sufficient, add more steam

distributors until the minimum saturation distance is attained. (See Figure 13.)

(3) To determine the number of distributors required, complete the following list:

(a) Air humidity after humidification _____ %rh. (A high limit humidistat should be set

at 80 – 85% to prevent wetting of ducts.) (b) Air temperature before humidification _____. (c) Air velocity in duct _____ ft/min. (d) Maximum steam mass flow _____ lbs/hr. (e) Active zone H of steam distributor _____ in. (See Figure 13.)

NOTE

The manufacturer recommends the appropriate distance modification factors when filters or humidification sensors are installed downstream. For applications that are outside of the Nomogram’s range, please consult a NORTEC representative.

G. TYPICAL APPLICATIONS

(1) Representations of typical applications are found in Figure 15 and Figure 16.

H. DISTRIBUTOR DIMENSIONS

(1) Distributor dimensions for the various distributor models can be found in

Chapter 10-30.

Figure 15. Roof Top Units 2-20 Tons –

Typical Location

Figure 16. Small Units On Residential

Furnaces

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5. SHORT ABSORPTION MANIFOLD (SAM-e)

A. GENERAL

(1) NORTEC’s best performing steam absorption system for use in Air Handling Units and

duct systems where short steam absorption distance is critical.

(2) The SAM-e, Figure 17, distributes clean steam, precisely controlled, uniformly into the

entire air stream, void of any condensate spray. Steam distribution takes place via distributor tubes with integrated nozzles. The steam is kept dry as condensate is drained through the main header.

(3) The stainless steel distribution tubes are typically mounted vertically but can also be

mounted horizontally (10° slope) for vertical airflow applications. The distribution tubes come equipped with evenly spaced stainless steel nozzles providing optimum steam distribution, over the entire length of the tube.

(4) The nozzles extend into the center of the distribution tube ensuring only condensate

free steam is released. (See Figure 18.) Condensate drains out of the distribution tubes, through the header, eliminating the need for jacketed tubes. A permanent bond between the nozzle and distribution tube is made when the nozzle is pressed into the tube. The nozzles and tubes have the same thermal expansion characteristics guaranteeing a permanent union. The specifically sized orifices ensure consistent output from each nozzle.

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Figure 17. SAM-e Tubes

Figure 18. Cross-Section of Distributor Pipe

(5) The features of the short absorption manifold are:

(a) Inlets/Outlets located on same side, one access point required. (b) All stainless steel distributors and nozzles ensure permanent bond. (c) Stainless steel header with rubber grommet seals for easy installation of

distribution tubes. (d) Adjustable mounting frame available for quick and easy installation. (e) Available with 3", 6", 9", or 12" center-to-center distributor spacing. (f) Atmospheric steam source. (g) Two year limited warranty.

B. DETERMINING THE STEAM ABSORPTION DISTANCE

NOTE

Visit www.humidity.com to download our Humidification Engineering & Loadsizing Program (H.E.L.P.) to help you calculate the absorption distance.

(1) Injecting steam into the air requires a certain amount of time before the steam is

absorbed completely.

(2) In a moving air stream, this time results in the steam moving a fixed distance from the

manifold before it is fully absorbed.

(3) Knowing the absorption distance will ensure that steam will not condense on any

critical components following the steam distribution area.

(4) The system should be designed to eliminate the possibility of wetting internal

components by positioning the manifold in the optimum location and by keeping the absorption distance to a minimum.

(5) The absorption distance can be calculated using the Z ratio. The Z ratio and the

following method may be used as a guide to calculate the absorption in various air handlers, and ducts with different conditions. It can be calculated as follows:

- RH

(RH Z = ––––––––––

RH RH

(100 - RH

= Percentage of relative humidity after humidification.

= Percentage of relative humidity before humidification.

)

Example 1:

• 55°F (12.8°C)/ 12% RH - Conditions before humidification.

• 20 000 CFM (33 980 m

/h)

• 400 lbs/hr (181 kg/hr) load

Using the H.E.L.P. Software or a psychrometric chart you can find that the

humidity conditions after adding 400 lbs/hr (181 kg/h) of steam, are 55°F (12.8°C)

61% rh.

Thus giving:

= 12%

= 61%

Z= (61 - 12) / (100 - 12) = 0.56

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(6) Absorption Distances:

3" centers = 7" (18 cm) 6" centers = 9" (23 cm) 9" centers = 12" (31 cm) 12" centers = 18" (46 cm)

(7) Reference Figures 19, 20, 21 and 22 to determine the center-to-center spacing

required.

NOTES

1. The absorption distance data is based on 55°F (13°C) minimum temperature before humidification.

2. Data is based on velocities between 200 fpm (101 cm/s) and 2500 fpm (1270 cm/s).

3. Absorption distance: This is the distance between the SAM-e and the first obstruction (coil, elbow, damper, etc.) and the first obstruction steam may hit. Traces of steam may pass this obstruction, but will not condense, leaving obstructions dry.

4. If any of the duct AHU conditions are changed, the absorption distance may change due to increase or decrease in duct temperatures, amount of fresh air, various outside conditions, set point requirements, etc. If this occurs, re-calculate the absorption distance, and determine if the SAM-e needs to be modified or relocated.

C. STATIC AIR PRESSURE

(1) Table 15 shows the static pressure loss created by a SAM-e in various velocities.

Table 15. Air Pressure Loss in AHU/Duct

Air Pressure Loss (inches of water column)

Air Velocity fpm

(cm/s)

3" (7.6 cm) 6" (15.2 cm) 9" (22.7 cm) 12" (30.5 cm)

500 (255) 0.01 (0.02) 0.01 (0.02) No measurable data

750 (383) 0.03 (0.08) 0.01 (0.02) 1000 (510) 0.05 (0.013) 0.02 (0.05) 1250 (638) 0.07 (0.18) 0.03 (0.08) 1500 (765) 0.09 (0.23) 0.04 (0.10) 0.01 0.01 1750 (893) 0.10 (0.25) 0.06 (0.15) 0.01 0.01

2000 (1020) 0.12 (0.3 0) 0.08 (0.20) 0.01 0.01

SAM-e Tube Spacing

D. CONDENSATE LOSSES

(1) The SAM-e will condense some of the steam generated by the NORTEC humidifiers.

To compensate for this loss in capacity, we must increase the calculated humidification load accordingly. Refer to Table 16.

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Figure 19. Absorption Distance – 3" Centers

Figure 20. Absorption Distance – 6" Centers

Figure 21. Absorption Distance – 9" Centers Figure 22. Absorption Distance –

12" Centers

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(2) NORTEC recommends the installation of a condensate drain on the steam inlet run

prior to entering the SAM-e.

Table 16. Condensate Loss

Air Velocity fpm (cm/s)

500 (255) 15% 12%

1000 (510) 20% 15%

NOTE: These values may increase or decrease due to many unknown conditions or variables. This is only a guideline.

Condensate Losses (% of Maximum Capacity)

55°F 70°F

E. CORRECT CHOICE OF PRODUCT APPLICATIONS (WITHIN SAM-e)

(1) The SAM-e has been designed exclusively for use in building ventilation duct systems,

where manufacturing, processing and hi-tech activities are conducted. Applications that do not conform to the design parameters are not recommended and will be at the user’s own risk. NORTEC produces a wide range of different humidification systems to suit virtually all normal applications, and will be happy to recommend the most appropriate system to suit each particular requirements.

F. SAM-e DIMENSIONS

(1) Dimensions for the SAM-e and mini SAM-e can be found in Figure 6 and Figure 7 in

Chapter 10-30.

G. SAM-e HEADER SELECTION

(1) NORTEC offers different ranges of manifolds to cover capacities and duct sizes. The

absorption distance and capacity required will determine the center to center spacing between each steam tube on the header. There are four options: 3" (7.6 cm), 6" (15.2 cm), 9" (22.9 cm) or 12" (30.5 cm). The smaller the spacing, the more tubes the header can accommodate, thus giving a better absorption distance and greater capacity. (See Tables 17 to 20.)

(2) The header remains the same for in-duct or outside duct mounting, for atmospheric

steam, and for vertical or horizontal flow applications. (See Figure 23.)

(3) Atmospheric manifolds with a capacity over 801 lbs/hr (362 kg/hr) will include a second

steam inlet on the header. Consult factory submittal drawings for specific details.

(4) Select the header part number associated with your duct or air handling unit’s width.

For example, if the duct width is 80" (198.11 cm), select part number 150-3279 for 3" (7.6 cm) center-to-center spacing.

H. SAM-e STEAM TUBE SELECTION

(1) Constructed of 1.5" (3.81 cm) OD 304 stainless steel tubing, the steam tubes can

accommodate duct heights between 18" (45.72 cm) - 144" (365.76 cm) for in-duct header mounting. For smaller duct applications, a mini SAM-e can accommodate sizes starting at 12" (30.5 cm) wide x 8" (20.3 cm) high. (See Figure 20.) Each steam tube has a different amount of stainless steel nozzles to evenly disperse steam into the duct or air handling unit. The nozzles take the steam from the center of the tube, elimina ting any need for jacket heating, and a temperature switch. All the accumulating condensate is drained vertically down to the main header, and then out the condensate drain. NORTEC’s unique ‘slip in’ installation method makes for a very quick and effortless assembly. (See Figure 24.)

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(2) There is a selection of four types of

steam tubes. Each are capable of distributing different capacities. To select the steam tube for your application refer to Table 17.

Type A 15 lbs/hr (7 kg/hr) Type B 35 lbs/hr (16 kg/hr) Type B+ 55 lbs/hr (25 kg/hr) Type C 75 lbs/hr (34 kg/hr)

(3) The humidifiers maximum capacity

and SAM-e header will determine the steam tube type required. The selected header will determine how many steam tubes are required, refer to Tables 18, 19, 20 and 21. Remember to calculate your condensate losses.

Figure 23. SAM-e Header

Figure 24. SAM-e Tubes

Figure 25. Steam Inlet

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I. SAM-e STEAM INLET CONFIGURATION SELECTION

(1) Atmospheric Steam (NH, GS, SE)

(a) The steam inlet, Figure 25, is determined by the selected humidifier. Refer to

submittals, Chapter 10-30 to determine the size of steam outlet required.

(b) For a typical SAM-e installation, see Figure 26.

J. MINI SAM-e

(1) For the mini SAM-e installation, refer to Tables 18, 19, 20 and 21 for headers, tubes

and inlet configuration.

Table 17. SAM-e Tube Matrix

*In-Duct

Height

in. (cm)

18 (45.7) 1503388 N/A N/A N/A 5.5 (14.0) 24 (61.0) 1503389 1503411 N/A N/A 11.5 (29.2) 30 (76.2) 1503390 1503412 1509391 N/A 17.5 (44.5)

36 (91.4) 1503391 1503413 1509392 1503440 23.5 (59.7) 42 (106.7) 1503392 1503414 1509393 1503441 29.5 (74.9) 48 (121.9) 1503393 1503415 1509394 1503442 35.5 (90.2) 54 (137.2) 1503394 1503416 1509395 1503443 41.5 (105.4) 60 (152.4) 1503395 1503417 1509396 1503444 47.5 (120.7) 66 (167.6) 1503396 1503418 1509397 1503445 53.5 (136.9) 72 (182.9) 1503397 1503419 1509398 1503446 59.5 (151.1) 78 (198.1) 1503398 1503420 1509399 1503447 65.5 (166.4) 84 (213.4) 1503399 1503421 1509400 1503448 71.5 (181.5) 90 (228.6) 1503400 1503422 1509401 1503449 77.5 (196.9) 96 (243.8) 1503401 1503423 1509402 1503450 83.5 (212.1)

102 (259.1) 1503402 1503424 1509403 1503451 89.5 (227.3)

TYPE A 15 lbs/hr (7 kg/hr)

TYPE B

35 lbs/hr

(16 kg/hr)

TYPE B+ 55 lbs/hr

(25 kg/hr)

TYPE C

75 lbs/hr

(34 kg/hr)

‘L’

Dimension

in. (cm)

In-duct

Optional

Mounting

Frame

1504697

1503469

1503470

1503471

Outside-

Duct

Optional

Mounting

Frame

1504697

1503469

1503470

1503471

Steam Tube Profile

108 (274.3) 1503403 1503425 1509404 1503452 95.5 (242.6) 114 (289.6) 1503404 1503426 1509405 1503453 101.5 (257.8) 120 (304.8) 1503405 1503427 1509406 1503454 107.5 (273.1) 126 (320.0) 1503406 1503428 1509407 1503455 113.5 (288.3) 132 (335.3) 1503407 1503429 1509408 1503456 119.5 (303.5) 138 (350.5) 1503408 1503430 1509409 1503457 125.5 (318.8) 144 (365.8) 1503409 1503431 1509410 1503458 131.5 (334.0)

NOTE: *Add 6" (15.2 cm) to In-Duct Height for Outside-Duct Mounting of Header.

1503472

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1503472

Table 18. Mini SAM-e Headers – 3"

Duct Width

in. (cm)

12 (30.5) 3 1509811 30 (14) 60 (27) 90 (41) 18 (45.7) 5 1509812 50 (23) 100 (45) 150 (68) 24 (60.9) 7 1509813 70 (32) 140 (64) 210 (95)

Steam Tubes Qty

Header

Part Number

Maximum Capacity Atmospheric lbs/hr (kg/hr)

MA MB MC

Table 19. Mini SAM-e Headers – 6"

Duct Width

in. (cm)

12 (30.5) 2 1509814 20 (9) 40 (18) 60 (27) 18 (45.7) 3 1509832 30 (14) 60 (27) 90 (41) 24 (60.9) 4 1509833 40 (18) 80 (36) 120 (54)

Steam Tubes Qty

Header

Part Number

Maximum Capacity Atmospheric lbs/hr (kg/hr)

MA MB MC

Table 20. Mini SAM-e Tubes

*In-Duct

Height

in. (cm)

8 (20.3) 1509788 N/A N/A 10 (25.4) 1509789 N/A N/A 6½" (16.5) 12 (30.5) 1509790 1509797 1509804 8½" (21.6)

TYPE MA

10 lbs/hr

(25 kg/hr)

TYPE MB

20 lbs/hr

(9 kg/hr)

TYPE MC

30 lbs/hr

(14 kg/hr)

In-duct

Optional

Mounting

Frame

‘L’ Dimension

in. (cm) Steam Tube Profile

4½" (11.4)

14 (36.6) 1509791 1509798 1509805 10½" (26.7) 16 (40.6) 1509792 1509799 1509806 12½" (31.8) 18 (45.7) 1509793 1509800 1509807 14½" (36.8) 20 (50.8) 1509794 1509801 1509808 16½" (41.9) 22 (55.9) 1509795 1509802 1509809 18½" (47.0) 24 (60.0) 1509796 1509803 1509810 20½" (52.1)

Not Required

Table 21. Mini Inlet Configurations – For Atmospheric Steam Unit

SAM-e Steam Inlet Part Number

f" OD 1509839

1¾" OD 1509837

2 X 1¾" OD 1509838

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Figure 26. Typical SAM-e Installation for Atmospheric Steam Applications

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6. BLOWER PACKS (BOBP, RMBP)

STEAM DISTRIBUTOR ON THE BUILT-ON AND REMOTE BLOWER PACKS HAVE A HOT SURFACE THAT COULD RESULT IN BURNS IF TOUCHED. NORTEC RECOMMENDS MOUNTING AT LEAST 8 FEET ABOVE THE FLOOR.

A. BLOWER PACKS

(1) Optional blower packs are used to distribute steam to localized areas such as computer

rooms or in areas that do not have a built-in air distribution system.

(2) Blower packs are available integrally mounted on humidifier BOBP, (See Figure 27.) or

detached and field-piped and wired to humidifier RMBP. (See Figure 28.)

(3) Blower packs consist of a matching powder coated steel cabinet containing: three axial

blowers with finger guards powered by 120 VAC or line voltage humidifiers, with built-in multi-tap transformer (when necessary), fuse, high temperature plastic distributor with stainless steel lid, horizontal and vertical adjustment knobs for directional control, builtin thermostat to activate blowers, speed control rocker switch and safety loop relay.

(4) Refer to Table 22 for ceiling and frontal clearances required for blower packs.

Dimensions apply to both built-on and remote-mounted versions of blower packs.

(5) Mount remote blower pack(s) using factory supplied wall mounting bracket with

clearances as recommended in Table 22.

WARNING

Figure 27. NH Series Humidifier With

Built-On Blower Pack

Figure 28. NH Series Remote Mounted

Blower Pack

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Table 22. Ceiling and Frontal Clearances for Blower Packs

NH Series Model

005 1 18 (45) 30 (76) 010 1 18 (45) 30 (76) 020 1 18(45) 36 (91) 030 1 18 (45) 72 (183) 050 1 36 (91) 84 (213) 075 1 42 (106) 144 (366) 100 1 48 (122) 156 (396) 150 2* 42 (106) 144 (396) 200 2* 48 (122) 156 (396)

NOTES: 1. Remote mounted only. Four remote mounted blower packs are recommended on the 200 model.

2. Clearances based on 72°F at 35% RH.

Minimum Number Of

Blower Packs

Minimum Ceiling Clearance

in. (cm)

Minimum Front Clearance

in. (cm)

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7. CONTROLS

A. GENERAL

(1) NORTEC humidifiers all accept on/off controls for their security loop. Many NORTEC

humidifiers can also accept modulating or transducer signals for control (See the features section for each specific model).

REGARDLESS OF SELECTING ON/OFF OR MODULATING CONTROL METHOD, NORTEC HUMIDIFIERS MUST HAVE 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.

B. ON/OFF CONTROLS

(1) On/Off controls are used in all NORTEC humidifier security loops. The digital

humidistat can also be used as a space humidity controller. These controls include:

CAUTION

(a) Air Proving Switch

point from 0.07 IWC to 12.0 IWC, good for positive, negative or differential pressure applications, stops humidifier if duct air pressure is not sensed. Turns humidifier off if air handler fails.

(b) Duct Mounted Digital Humidistat

15-90% rh with accuracy fixed at ±3% at 25°C on humidity drop for control and opens on rise for high limit duct application.

15-90% rh with accuracy fixed at ±3% at 25°C on humidity drop for control and opens on rise for high limit application.

(d) On/Off Controls Supplied by Others

of contacts capable of passing a 24-VAC, 2-A maximum signal.

C. MODULATING CONTROLS

(1) Modulating Controls are used to send a modulating demand signal to the NORTEC

humidifier. Different models can accept different signals (see features section for each specific model) NORTEC supplied controllers send a 0-10 VDC demand signal. This signal can be used as a control and in some models can also be used as a modula ting high limit. These controls include:

(a) Wall Mounted Digital Humidistat with Integrated Sensor

adjustable set point from 15-90% rh with accuracy fixed at ±3% at 25°C, outpu ts a 0-10 VDC signal.

– duct mounted, pressure differential switch, adjustable set

– control or high limit, adjustable set point from

, operating range of 0-95% rh, closes

– control or high limit, adjustable set point from

, operating range of 0-95% rh, closes

– Can be used as long as they have a dry set

– control or high limit,

(b) Wall Mounted Digital Humidistat Without Sensor

set point from 15-90% rh with accuracy fixed at ±3% at 25°C, outputs a 0-10 VDC signal. Requires a remote transducer sensor supplying a 2-10 VDC signal.

remote sensor and a wall mounted controller without sensor. Control or high limit, adjustable set point from 15-90% rh with accuracy fixed at ±3% at 25°C, outpu ts a 0-10 VDC signal.

– control or high limit, adjustable

– This package comes with both a

2008-10-01

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(d) Modulating Demand Signal Supplied by Others – A signal that is a linear demand

signal that rises on need for humidity can be used in conjunction with NORTEC humidifiers. See features section for a list of which models can accept which signal)

D. OUTDOOR TEMPERATURE SETBACK

(1) The outdoor temperature setback sensor is used to prevent condensation on windows

or other surfaces that are adjacent to outdoor air. This sensor can be used in conjunction with the NORTEC controls mentioned above (both the on/off and modulating demand signal controllers) The sensor allows the controller to override the set point to prevent the humidifier from humidifying when condensation could be possible. (See Figure 29.) Locate the temperature sensor near the fresh air intake. This will ensure accurate representation of the outdoor air temperature.

E. TRANSDUCER SENSORS

(1) Transducer Sensors are signals sent back to either a controller or back to the

humidifier. Limited models can accept a direct transducer signal. (See features section for each specific model) The sensors include:

(a) Wall Mounted Humidity Transducer

95% rh.

(b) Duct Mounted Humidity Transducer

95% rh.

rh in the room.

– Humidity sensors that rise linearly with the sensed

– Sensor, output of 2-10 VDC, range of 0 to

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Figure 29. Set Point Versus Outdoor Temperature

F. POSITIONING CONTROLS AND SENSORS

(1) When positioning controls and sensors, ensure other factors do not influence these

devices and give incorrect inputs to the unit. Some of these influences are: (a) The wall humidistat should not be installed on an outside wall or hot or cold

surface.

(b) The sensor should be installed away from any heat source and away from direct

sunlight and away from any water vapor producing source. (c) The wall surface should be flat and clean. (d) Any draft originating from the wall interior should be prevented from interacting

with the humidity sensor. A vapor barrier should be installed. (e) Location of sensor must be representative of space humidity therefore avoid

drafts, temperature variation or overhangs that may prevent the sensor from

sensing an accurate representation of the space humidity. (f) Duct sensors should be placed in a location that assures any and all absorption

has been accomplished.

G. NORTEC ONLINE

(1) NORTEC OnLine enables secure, internet based monitoring, simplifies interoperability

and automated email service notification. Using standard Internet Explorer, version 6.0 or newer, NORTEC OnLine provides both monitoring and control, from any location with Internet access, for a period of one year. (See Figure 30.) During the service period, NORTEC OnLine will also generate automatic e-mails when scheduled service is required and/or abnormal operation occurs. Up to three customer(s) e-mail addresses may be added to the automatic notification feature, to provide instant notification.

(2) NORTEC OnLine factory technicians will remotely view each humidifier weekly and

record key status information, which will be used for an annual report to the key customer contact. This contact will also receive notification of corrections, or service recommendations from the NORTEC OnLine technician responding to automated e-mail notifications.

(3) The factory-installed NORTEC OnLine controller is located internally to the humidifier. (4) Key features of NORTEC Online include:

(a) Graphical representation of humidifier performance (b) Enable/disable humidifier (c) Adjust %rh set point(s), if equipped (d) Adjust manual Limited Capacity (e) Automated e-mail advisories for scheduled service or abnormal conditions (f) Up to fifty incidents, of factory direct support and follow-up (g) First year of remote access includes factory direct monitoring (h) Weekly checks by NORTEC OnLine factory technicians (i) Remote factory diagnostics and programming capability (j) Individual account access to www.norteconline.com (k) Monitor up to seventy parameters from each humidifier

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Figure 30. NORTEC OnLine Monitoring

(l) Access to service history (m) Option to add up to seven slave humidifiers to each NORTEC OnLine module (n) Monitor up to eight humidifiers (one master, seven slaves) with one Internet

connection (o) Up to three years of coverage can be purchased at time of order (p) Secure 128-bit Internet connectivity (SSL)

(5) Different networking configurations may be achieved and are mostly dependant on the

type of network present at the site. Specify at the time of order using the form in Figure 31. Connection options include:

(a) Static IP connection (b) DHCP (dynamic IP) (c) GPRS connection (d) Dial-up modem connection.

H. NORTEC LINKS

(1) Provides a network connection to a BMS system using one of the following protocols:

(a) BACnet IP (b) BACnet MSTP (c) LonWorks (d) Modbus (Standard on the NHTC and NHTC Outdoor) (e) Johnson N2.

(2) NORTEC Links provides monitoring and control allowing humidifier(s) to communicate

to your Building Management System (BMS). The controller is factory installed and is located internally to the humidifier. NORTEC Links can be integrated with NHTC, NHSC/DI, GSTC/SETC technologies. Simply specify at time of order, using the form in Figure 32, what operating protocol you are using BACnet IP, BACnet MSTP, LonWorks, Modbus or Johnson N2.

(3) Some features of NORTEC links are:

(a) Digital feedback for unit standby/humidifying mode. (b) Digital feedback for service required. (c) Digital feedback for fault indication. (d) System demand display. (e) Control enable/disable.

(4) Combined with direct sensor connection to either the humidifiers or BMS it is also

capable of: (a) Control room set point (b) Control high limit set point (c) Control room %rh (d) Control high limit %rh.

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I. TYPICAL INSTALLATION LAYOUT FOR NHTC/NHPC

(1) The following are examples of typical control installation possibilities. There are many

more configurations possible, be sure to consider the application and positioning as a priority. Figures 33, 34, 35, and 36 show typical control installation.

J. NORTEC CONTROLLER DIMENSIONS

(1) See dimensions in Chapter 10-30.

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NORTEC ONLINE CONFIGURATION FORM

Please complete the information below.

Attention: Date: Company: Fax #: From: Page: of Subject: NORTEC Online Information

G FOR YOUR INFORMATION G RESPONSE REQUESTED

Agent P.O. Number: ____________________ Sales Order Number: ____________________

Desired NORTEC Online Connection Type:

 Static IP connection  DHCP (dynamic IP)  GPRS connection  Dial-up modem connection

Setting for GPRS Connection:

User Name: ____________________ Password/PIN Code: ____________________ APN String: ____________________ Connection String: ____________________

Humidifier Ordering

Humidifier

Model/Size

Unit

Designation

Desired Unit

Order

Lead Humidifier

Unit 1 Unit 2

Unit 3

Unit 4

Unit 5

Unit 6

Unit 7

Settings for Static IP Connection:

Module IP Address: ____________________ Subnet Mask: ____________________ Default Gateway Address: ____________________ Primary DNS: ____________________ Secondary DNS: ____________________

Settings for Dial-up Modem Connection:

User Name: ____________________ Password: ____________________ Phone Number to dial: ____________________

Be sure to include complete dial-up number string such as area code if necessary.

Email Addresses for Event Notification:

Email Contact 1: ____________________ Email Contact 2: ____________________ Email Contact 3: ____________________

End User Information

Time Zone: ____________________ Company Name: ____________________ Address: ____________________

____________________

____________________ Phone Number: ____________________ Main Contact Person: ____________________

Unit 8

Figure 31. NORTEC Online Configuration Form

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NORTEC LINKS FORM

Please complete the information below.

Attention: Date: Company: Fax #: From: Page: of Subject: NORTEC Links Information

G FOR YOUR INFORMATION G RESPONSE REQUESTED

MESSAGE Agent P.O. Number: ____________________ Sales Order Number: ____________________

Desired NORTEC Links Option:

 BACnet/IP  BACnet/MSTP  Johnson N2  LonWorks

Humidifier Ordering:

Humidifier

Model/Size

Settings for BACnet/IP only:

Default Gateway Address: ____________________ Network Number: ____________________ Subnet Mask: ____________________ Module IP Address: ____________________

Desired Unit Order

Lead Humidifier

Unit 1 Unit 2

Unit 3

Unit 4

Unit 5

Unit 6

Unit 7

Unit 8

Unit 9

Unit 10

Unit 11

Unit 12

Unit 13

For all GS/SE humidifiers equipped with NORTEC Links and NH units with BACNET/IP.

Figure 32. NORTEC Links Form

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Figure 33. Humidifier Controlled by Air Proving, On/Off Duct Mounted High Limit and

Modulating Wall Mounted Space Controller

Figure 34. Humidifier Controlled by Air Proving, Modulating Duct Mounted High Limit and

Modulating Wall Mounted Space Controller

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Figure 35. Humidifier Controlled by Air Proving, Modulating Duct Mounted High Limit and

Modulating Wall Mounted Return Air Sensor with Wall Mounted Controller

Figure 36. Humidifier Controlled by Air Proving, Duct Mounted High Limit Sensor and

Modulating Duct Mounted Return Air Sensor with Networking Option

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SPECIFICATIONS

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1. HUMIDIFIERS

A. GENERAL

(1) Work Included

(a) NORTEC NH Series electrode steam humidifier(s) as indicated on drawing(s) and

as indicated on schedule(s).

(b) Complete and operable humidification system (which meets applicable building

codes).

representative.

(2) Submittals

(a) Submit product data under provisions of Section 15010. Include product

description, model, dimensions, component sizes, rough-in requirements, service sizes, and finishes. Include rated capacities, operating weights, furnished specialties, and accessories.

(b) Include piping details, plans, elevations, sections, details of components, and

dispersion tubes. Submit wiring diagrams including power, signal, and control wiring.

(3) References

SPECIFICATIONS

(a) Certifications, C-UL_US Listed. (b) ISO 9001-2000. (c) ANSI/NFPA 70 – National Electrical Code. (d) ARI 640, ‘Standard for Commercial and Industrial Humidifiers’. (e) ASHRAE SSPC 135 BACnet, ANSI/EIA 709.1 LonTalk.

(4) Warranty

(a) Product shall be warranted to be free from defects in material and workmanship for

a period of two years after installation or 30 months from manufacturers ship date, whichever date is earlier. If operating with NORTEC web-based service program warranty is extended to 42 months from ship date.

B. PRODUCTS

(1) Electrode Steam Humidification System – NORTEC Model NHTC

(a) NORTEC NHTC electrode steam generating system using regular type potable

water supply.

(b) Packaged unit, wall mounted, requiring steam distributor(s) or Short Absorption

Manifold(s) for mounting into AHU/duct(s) or Remote/Built-On Mounted Blower Pack(s) for direct space applications. Refer to Humidifier Dispersion Options in paragraph B.(4).

an electrode steam cylinder(s). Resistive element technology and boiler steam (pressure steam) technology not acceptable. The disposable electrode steam cylinder shall have:

Published life expectancy.

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2 Published replacement pricing. 3

Cylinder seams must be spin welded to ensure long-term water tightness and leak resistance.

Integral electronics to ensure safe operation.

High water sensor circuitry to prevent over filling.

Efficient operation over a wide range of water conditions.

Simple maintenance without disassembly or removal of humidifier. No specialized tools required.

Full output and maximum energy efficiency through entire cylinder life.

‘Drain through bottom’ to ensure highest mineral concentration is effectively removed. Simple skimmers are not acceptable.

Large perforated strainer at drain outlet to prevent blockage of drain valve or drain lines.

Tool-less primary electrical connection for use with factory installed, spring loaded, gold plated connectors.

Safety characteristics ensuring no current flow with absence of water, independent of safety controls. Resistive element not acceptable.

(d) Unit(s) to be complete with:

‘Total Controller’ microprocessor to control all humidifier functions with interface capabilities for remote communication technologies, including Internet or BMS requirements.

Advanced water management utilizing the patented Proportional plus Integral Autoadaptive control system for optimal energy efficiency, water usage and cylinder life.

Microprocessor controlled fill valve and drain valve allowing automatic water management.

Internal drain water tempering to ensure maximum 140°F (60°C) drain water.

Integral fill cup with minimum 1-inch (25-mm) air gap to prevent back siphoning.

Smart cylinder EPROM for improved operation providing: a

Cylinder identification with model, data, and capacity.

Cylinder self diagnostics ensuring safe operation.

End of cylinder life status.

Cylinder run time in hours.

Full cylinder indication and pre-notification of automatic shutdown at end of cylinder life.

Automatic pulse feature to clean any obstruction from the drain solenoid valve when needed.

Automatic off-season shut-down (after 3 days of ‘no call’) will completely drain the cylinder(s) and automatically restart on call for humidity. Adjustable on/off and time sequence. Provides extended cylinder life, while ensuring stagnant water does not remain in the system.

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10 Accepts a signal from BMS/BAS system or modulating humidistat. 11

Single or dual channel signal acceptance.

Isolated plumbing and electrical compartment with cabinet made of 18-gauge powder coat paint finish and 20 gauge plumbing electrical door. Modular plumbing and electrical fully assembled and pre-wired (no field assembly required).

Removable door (no special tools required) to allow user full front access of plumbing and electrical sections.

Plumbing door interlock safety switch to allow power interruption when installing or servicing the humidifier.

Standard of acceptance NORTEC NHTC Series.

C-UL_US listed.

Spec

(2) Humidifier Controls (NHTC and NHTC Outdoor)

(a) Total Controller microprocessor with the following features or functions:

Full function user interface with touch type keypad and backlit alphanumeric graphic display with trend log.

Real time clock indicating date and time with battery back up.

Built-in controller with adjustable set point, proportional range, and integral for use with humidity transducers.

Acceptance of industry standard (analogue continuous control demand signal [0-5 VDC] [1-5] [0-10 VDC] [0-20 mA] [4-20 mA]) relative humidity transducers.

Keypad programming to configure, monitor and control humidifier parameters on graphic backlit display

Relative humidity set point and actual conditions in space from humidity transducer.

Relative humidity set point and actual conditions in duct for variable air volume (VAV) applications from humidity transducer.

Relative humidity high limit set point and actual from humidity transducer.

System demand in lbs/hr (kg/hr).

On screen service history with date stamp.

On screen fault history with troubleshooting list and date stamped.

On screen attention indication.

Security loop status open/close.

Control Channel 1 demand %.

Control Channel 2 demand %.

Control mode (single or dual modulation).

Control type (demand or rh proportional, rh proportional + integral).

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m Manual capacity output adjustment range of 20-100%. n

Humidifier model, capacity, software version.

Cylinder model # and capacity rating.

Humidifier run time weighted hours.

Date and time (year, month, day, hour and minute).

Stand by heating to increase steam production response time.

Rapid modulation capability reduces response time upon start-up.

Short cycling detection and correction diagnostics.

Foam detection and correction capability.

Scroll through start-up and troubleshooting checklist on graphical display.

Self-diagnostics during start-up to system test to prevent unsafe operation of the unit(s).

User adjustable drain/flush frequency.

HUMIDIFIER CONTROLS NHPC

(b) Proportional Controller microprocessor with following features or functions:

Graphic function display with user interface with touch type key pad.

Acceptance of industry standard [analogue continuous control demand signal [0-1Vdc] [1-5Vdc] [0-10 Vdc] [2-10 Vdc] [0-16 Vdc] [0-20 mA]

(c)

Keypad/Display to monitor and control humidifier parameters. a

System demand in lbs/hr (kg/hr).

Security loop status open/close.

Control Channel 1 demand %.

Manual capacity output adjustment range of 20-100%.

Self-diagnostics during start-up to system test to prevent undase operation of the Unit[s].

Control signal type.

Software version.

Internal communications via Modbus RTU protocol provides monitoring and control allowing humidifier(s) to communicate to Building Management System (BMS). Supporting a RS485 port with a configuration of 9600bps, 8-bits, no parity, one stop bit shall support the following variables:

Change Cylinder – Indicates cylinder needs to be replaced (read).

Channel 1 Input – Humidifier input value being supplied to channel 0100% (read/write).

Channel 1 Set point – Control channel 1 setpoint for relative humidity in space 0-100% (read/write).

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Channel 2 Input – Humidifier input value being supplied to channel 0100% (read/write).

e Channel 2 Set point – Control channel 2 setpoint for relative humidity in

space 0-100% (read/write).

System Demand – Indicates humidifier system demand based on input signal calculations 0-100% (read).

Demand/rh_Configuration Parameter – Configures humidifier to accept demand or %rh signal(s) (read/write).

Remote fault Indication – System fault indication and alarm status (read).

Network Sensors – Allows network-enabled sensing or control (read/write).

Remote Disable – Provides remote humidifier enable/disable system control. (read/write).

Remote Service Indication – Provides remote humidifier service indication (read).

Remote Status Indication – Provides remote humidifier on/standby system status indication (read).

(3) Remote Monitoring And Control Options (NHTC and NHTC OUTDOOR only)

Reference: Section 15900 - Building Controls and Automation

(a) NORTEC OnLine web based monitoring and control from any location with Internet

access, using standard Internet Explorer, version 6.0 or newer.

(b) NORTEC OnLine remote monitoring hardware using secure <DHCP Ethernet

Connection> or <Static IP Ethernet Connection> or <Dial-up Internet Connection> or <GPRS wireless Internet Connection> Internet communication protocols.

by factory direct technicians for first year, renewable/extendable up three consecutive years.

(d) One additional year (third year), extended humidifier warranty when renewed/

extended for third year of NORTEC OnLine Monitoring Service (NOMeS).

(e) Packaged accessory, factory installed and ready for customer supplied <Ethernet>

or <Modem> communication connection.

(f) Package will include the listed items in either paragraph (f) 1

paragraph (g) 1 1

Internet accessible graphical representation of humidifier performance.

Remotely enable/disable humidifier.

Remotely adjust rh% set point(s), if equipped.

Remotely adjust ‘limited capacity’.

Automated e-mail advisories for scheduled service or abnormal conditions.

Up to three customer e-mail addresses available for automated e-mail advisories.

Up to 50 incidents, of factory direct support and follow-up per humidifier.

First year of remote access includes factory direct monitoring.

Weekly checks by NORTEC OnLine factory technicians.

through 7:

through 17 or

Remote factory diagnostics and programming capability.

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11 Individual account access to www.norteconline.com. 12

Monitor up to seventy parameters from each humidifier.

Access to service history.

Option to add up to <seven> or <six NMTC> ‘slave’ humidifiers to each NORTEC OnLine module.

Monitor up to <eight humidifiers (one master, seven slaves)> or <seven humidifiers (one master, six slaves)> with one <Ethernet> or <Modem> connection.

Up to three years of coverage can be purchased at time of order, extending humidifier limited warranty to three years.

Communication using secure 256-bit Internet connectivity (SSL) and Jabber protocol.

(g) NORTEC Links remote building management system capability using BACnet

MSTP, BACnet /IP LonTalk, or Johnson N2 networks for monitoring and controlling. The package will include:

Variable definitions, addresses, and values.

For complete function capabilities refer to 1.B.(2)(a)6.

Monitor up to 13 humidifiers (one master, 12 slaves) using a single interface.

External Interface File (XIF) for LonWorks integration.

Protocol Implementation Conformance Statement (PICS) for BACnet integration.

BACnet Interoperability Building Blocks (BIBBS) for BACnet Services.

User graphic with trending charts, complete with all humidifier details. Refer to

1.B.(2)(a)6

(4) Humidifier Dispersion Options

(a) Single Tube(s) Steam Dispersion with condensate drain – NORTEC Model(s)

ASD, BSD, 1 Allows for direct introduction of steam into a duct system or air handling unit.

Distributor tube is made of stainless steel and can be installed in a horizontal, upflow, or downflow duct applications.

Steam inlet connection size is f" (22.2 mm) O.D for ASD, BSD models and 1¾" (44.5 mm) for CSD model.

Rated capacities per single dispersion tube(s) model - ASD up to 25 lbs/hr, BSD up to 35 lbs/hr and CSD up to 115 lbs/hr.

All single tube(s) distributors have an integral condensate return, allows for condensate produced at the distributor to be drained through a d" (9.5 mm) drain leg either back to the humidifier or to a convenient floor drain.

(b) Wall Mounted Direct Steam Dispersion System – NORTEC Model(s) RMBP or

BOBP (for NHTC and NHPC only)

CSD

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Packaged unit, wall mounted allows for direct space/room humidification when steam introduction into a ducted system is not feasible.

2 The factory assembled blower pack includes an integral steam distributor,

three tubeaxial (box) fans, fusing, wall mounting bracket, and air proving safety circuitry.

Primary and control voltage terminal blocks facilitate field connections between the humidifier.

Blower pack may be remote mount or built-on the humidifier.

Short Absorption Manifold designed for atmospheric steam humidifiers or pressurized steam from a boiler, to directly inject the steam into ducted air for humidification.

Absorption distance characteristic shall prevent water accumulation on any induct surfaces beyond ___in. (___mm) downstream of the steam dispersion panel.

Steam dispersion panel consisting of a (one) horizontal stainless steel header supplying steam to a bank of closely spaced 3" (7.6 cm) or 6" (15.2 cm) or 9" (22.9 cm) or 12" (30.5 cm) vertical tubes, as necessary to meet absorption distance requirements, and to reduce condensation losses.

Single horizontal stainless steel header to provide steam to vertical distributor tubes and to reduce condensation losses. Dual header systems creating unnecessary condensation, or systems needing to be installed on a partition or requiring blank off plates are not acceptable.

C. EXECUTION

(1) Examination

Header design is primarily round tube to minimize pressure drop. Square headers are not acceptable.

Steam inlet and condensate return located on the same side and at the bottom of the header to allow single point entry and floor mounting.

Headers and tubes are 304 stainless steel construction.

Vertical stainless steel distribution tubes to promote condensate evacuation. Horizontal distributor tubes are not accepted.

Distribution tubes shall include threaded standoffs for trouble free attachment to factory supplied support bracket.

Stainless steel nozzle inserts ensure condensate free steam is discharged from the center of the distribution tubes. Systems without nozzle inserts, or other than stainless steel, are not acceptable.

Stainless steel nozzle inserts shall have metered orifices, sized to provide even distribution of the discharged steam, spaced for optimum steam absorption.

Nozzles of dissimilar metals are likely to dislodge due to inconsistent rates of expansion and therefore not accepted.

Adjustable mounting frame available for quick and easy installation.

(a) Examine ducts, air handling units, and conditions for compliance with requirements

for installation tolerances and other conditions affecting performance.

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(b) Examine roughing-in for piping systems to verify actual locations of piping

connections before humidifier installation.

(2) Installation

(a) Install humidifiers and steam dispersion panels per manufacturers’ instructions. (b) Seal humidifier dispersion-tube duct penetrations with flange. (c) I nstall with required clearance for service and maintenance.

(3) Commissioning

(a) System verification testing is part of the commissioning process. Verification

testing shall be performed by the contractor and witnessed and documented by the commissioning authority. Refer to section 01810, Commissioning, for system verification tests and commissioning requirements; or

(b) Manufacturer's Field Service: Engage a factory-authorized service representative

to inspect field-assembled components and equipment installation, including piping and electrical connections. Report results in writing. Responsibilities include:

Leak Test: After installation, charge system and test for leaks. Repair leaks and retest until no leaks exist.

Operational Test: After electrical circuitry has been energized, start units to confirm proper unit operation. Remove malfunctioning units, replace with new units, and retest.

Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

(4) Testing

(a) System testing is accomplished through either of the following methods:

System verification testing is part of the commissioning process. Verification testing shall be performed by the contractor and witnessed and documented by the commissioning authority. Refer to section 01810, Commissioning, for system verification tests and commissioning requirements; or

Manufacturer’s Field Service: Engage a factory-authorized service representative to inspect field-assembled components and equipment installation, including piping and electrical connections. Report results in writing. Responsibilities include:

Leak Test: After installation, charge system and test for leaks. Repair leaks and retest until no leaks exist.

Operational Test: After electrical circuitry has been energized, start units to confirm proper unit operation. Remove malfunctioning units, replace with new units, and retest.

Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

(5) Training

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(a) Equipment training can be accomplished in one of the following two ways:

1 Training of the owner’s operation and maintenance personnel is required in

co-operation with the commissioning authority. Provide competent, factory authorized personnel to provide instruction to operation and maintenance personnel concerning the location, operation, and troubleshooting of the installed systems. The instruction shall be scheduled in coordination with the commissioning authority after submission and approval of formal training plans. Refer to System Demonstrations, section 01670, for contractor training requirements. Refer to section 01810, Commissioning, for further contractor training requirements; or

Engage a factory-authorized service representative to train owner’s maintenance personnel to adjust, operate, and maintain humidifiers.

Train owner’s maintenance personnel on procedures and schedules for starting and stopping, troubleshooting, servicing, and maintaining equipment and schedules.

Review data in maintenance manuals. Refer to Division 1 Section Contract Closeout.

Review data in maintenance manuals. Refer to Division 1 Section Operation and Maintenance Data.

Schedule training with owner, through architect, with at least seven days advance notice.

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SUBMITTALS

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1. SUBMITTAL DESCRIPTIONS

A. INTRODUCTION

(1) The information found in this section is general in nature and consists of part

numbers, product descriptions and options, dimensions, specifications and equipment features.

B. NH UNIT

(1) The different wiring connections to the humidifier unit can be found in Figure 2. All

wiring is to be in accordance with existing national and local electrical codes.

(2) Performance data for single and double units can be found in Figure 3, Figure 4,

and Figure 5.

(3) NH Series unit options and common accessories universal are found in Tables 1

and 2.

C. DISTRIBUTORS

(1) A description of the accessories for the steam distributor can be found in Table 3. (2) Dimensions for the steam distributor are found in Figure 6, Figure 7, Figure 8.

D. SAM-e

(1) This section identifies the dimensions for the various configurations and components that make up a SAM-e installation.

(2) General dimensions for the SAM-e and Mini SAM-e are found in Figures 9 and 10. (3) For an in-duct/AHU installation without mounting frame refer to Figure 11. (4) For an in-duct/AHU installation with mounting frame refer to Figure 12. (5) For an outside duct installation without mounting frame refer to Figure 13. (6) For an outside duct installation with mounting frame refer to Figure 14. (7) For a vertical duct installation refer to Figure 15. (8) For outside duct mounting cover plates refer to Figure 16. (9) For atmospheric SAM-e adapter dimensions refer to Figure 17. (10) For atmospheric steam header and adapter configuration refer to Figure 18.

E. BLOWER PACK

(1) Remote Blower Packs

(a) Remote blower packs are powered from the NH humidifier from a primary

voltage terminal block provided and fed from the leaving side of the unit contactor to operate blower pack in conjunction with unit operation. A matching terminal block is incorporated in the blower pack. Field wiring is required

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between the NH unit and remote blower pack terminal blocks or can be powered by a seperate 12 ov supply.

(b) Disk thermostat mounted on the top of steam distributor will start the fan when

steam is generated and will allow to cool down the blower pack when there is no call for humidity.

200 units. It is recommended that four (4) RMBP’s be used to reduce the steam absorption distances.

(d) It is recommended that a minimum of two (2) remote blower packs be used on

NH 075-100 units to reduce the steam absorption distances. (e) For recommended ceiling and frontal clearances, see Chapter 10-10. (f) For blower pack dimensions refer to Figure 19, Figure 20, Figure 21.

(2) Built-On Blower Pack (NHTC and NHPC only)

(a) Built-on blower packs are factory mounted and wired to operate in conjunction

with the humidifier. Factory installed and wired manual reset thermostat will not

allow humidifier operation if blower pack becomes overheated. (b) Built-on blower packs are not available on NH 150-200. Remote blower packs

can be used with these units, multiple blower packs are required on NH 150-

200.

for direct space/room humidification when steam introduction into a ducted

system is not feasible. The factory assembled Built-On Blower Pack includes

an integral steam distributor, three direct drive fans for quiet operation, fan

adjustable louvers for installation flexibility, fusing and safety circuitry with fan

airflow rate at a total of 330 cfm. (d) It is recommended that a minimum of two (2) remote blower packs be used on

NH 075-100 units to reduce the steam absorption distances. (e) For recommended ceiling and frontal clearances, see Chapter 10-10. Note

minimum frontal clearance is 36" (91 cm). (f) For blower pack dimensions refer to Figure 19, Figure 20, and Figure 21.

F. CONTROLS

(1) NHTC/NHPC humidifiers can be easily modified to accept a control signal from a

modulating humidity controller as supplied by others. Controller must have a builtin adjustable %rh set point. Signal from controller must increase with a drop in sensed %rh below set point. Humidifier will respond by controlling unit output between 0% and 100% of rated capacity to match changes in load requirements.

(2) Double circuit humidifiers (NH 150-200) will require two external controllers by

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others to enable each circuit to operate independently of the other. Alternatively,

coupled circuits can be specified. Coupled circuits will enable the two circuits to be operated from one controller without compromising the safety features of the humidifier (order Part No.146-9000).

(3) The humidifier shall be controlled directly using a humidity sensor (transducer)

supplied by others. The sensor will be field wired to the humidifier for a direct control at the humidifier. The same sensor(s) can be shared in parallel to a Building Automation System for monitoring purposes. Allows keypad setpoint of rh and display of actual sensed rh on the NHTC’s graphical display.

(4) Double circuit humidifiers (NHTC 150-200) will require two external sensors by

others to enable each circuit to operate independently of the other. Alternatively, coupled circuits can be specified. Coupled circuits will enable the two circuits to be operated from one sensor without compromising the safety features of the NHTC humidifier (order Part No.146-9000).

(5) All controls are available from the factory as options. If controls were not ordered

with the humidifier, they may be purchased/supplied by others. The following information is relevant to all controls, factory supplied or otherwise.

(6) A, B and C are to be wired in series (only one path for current) across terminals 1

and 2 on the low voltage control terminal strip, or replaced with a jumper wire for constant operation.

(a) The Control On/Off Humidistat is wired to make on drop in humidity, break on

rise. Set to desired %rh.

(b) The High Limit On/Off Humidistat is wired to make on drop in humidity, break

on rise. Set to a higher set point (max. 85%rh) as a safety to prevent saturation.

when no air flow. As a safety to prevent saturation when no air flow.

(7) The factory offers various versions of A, B and C to suit each application. In

general, A is essential, whereas B and C are highly recommended.

(8) Field wiring from humidistat to humidifier and between devices should be 18 AWG

or heavier.

(9) The low voltage control terminal strip is provided in the electrical compartment. The

internal side is factory wired. The external side is to be field wired, unless the external controls have been cabinet mounted at the factory.

(10) Each unit is supplied with a wiring diagram adhered to the inside face of the

cabinet door.

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Figure 1. Low Voltage Control Terminal Strip

(11) A and B: Mount any wall humidistat (control or high limit) over a standard electrical box

at a height similar to a typical thermostat. Any wall humidistat should be in a location representative of the overall space being humidified and not in the path of a blower pack or an air supply grille.

(12) A: Mount any duct control humidistat in a location representative of the overall air

humidity, usually the return duct. Do not mount it directly in front of the steam distributor or in a turbulent or mixing zone. Mount it where the air’s humidity and temperature are uniform and representative air is over-humidified or approaching saturation.

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Figure 2. Primary (Line) Voltage Wiring to Unit

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Figure 3. Physical Data – NHTC/NHPC 005-030

Figure 4. Physical Data – NHTC/NHPC 050-100

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Figure 5. Physical Data – NHTC/NHPC 150-200

Unit Model NH 005-020 NH 030 NH 045-100 NH 135-200 Distributor Model No. of Cylinders No. of Outlets/Cylinder OD of Cylinder Outlet (NHTC,P,B) OD of Cylinder Outlet (NHSC/DI)

ASD BSD CSD CSD

1 1 1 2 1 1 1 2 f" f" f" 1¾"

1¾" 1¾" 1¾" 1¾"

Distributor Model

ASD 12 2 (51) 1.75 (44) 10 (254) 12 (305) ASD18 2 (51) 1.75 (44) 16 (406) 18 (457) ASD 24 2.25 (57) 1.75 (44) 20 (508) 24 (609) ASD 30 2.25 (57) 1.75 (44) 26 (660) 30 (762) ASD 36 2.25 (57) 1.75 (44) 32 (813) 36 (914) ASD 42 2.5 (64) 2 (51) 38 (965) 42 (1066) ASD 48 2.5 (64) 2 (51) 44 (1118) 48 (1219) ASD 54 2.5 (64) 2 (51) 50 (1270) 54 (1371) ASD 60 3 (76) 2.5 (64) 56 (1422) 60 (1524) ASD 66 3 (76) 2.5 (64) 62 (1575) 66 (1676)

Dimensions – in.(mm) Minimum Duct

Length –

in. (mm)

Figure 6. Distributor Dimensions (Sheet 1 of 3)

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Distributor

Model

BSD 12 2 (51) 1.75 (44) 10 (254) 12 (305) BSD 18 2 (51) 1.75 (44) 16 (406) 18 (457) BSD 24 2.25 (57) 1.75 (44) 20 (508) 24 (609) BSD 30 2.25 (57) 1.75 (44) 26 (660) 30 (762) BSD 36 2.25 (57) 1.75 (44) 32 (813) 36 (914) BSD 42 2.5 (64) 2 (51) 38 (965) 42 (1066) BSD 48 2.5 (64) 2 (51) 44 (1118) 48 (1219) BSD 54 2.5 (64) 2 (51) 50 (1270) 54 (1371) BSD 60 3 (76) 2.5 (64) 56 (1422) 60 (1524) BSD 66 3 (76) 2.5 (64) 62 (1575) 66 (1676) BSD 72 3 (76) 2.5 (64) 68 (1727) 72 (1828) BSD 78 4 (102) 3.5 (89) 47 (1880) 78 (1981) BSD 84 4 (102) 3.5 (89) 80 (2032) 84 (2133) BSD 90 4 (102) 3.5 (89) 86 (2184) 90 (2286) BSD 96 4 (102) 3.5 (89) 92 (2337) 96 (2438)

BSD 102 4 (102) 3.5 (89) 98 (2489) 102 (2590)

NOTES:

1. ASD Maximum rated output 25 lbs/hr (11.4 kg/hr).

2. BSD Maximum rated output 35 lbs/hr (15.9 kg/hr).

3. CSD Maximum rated output 115 lbs/hr (52.3 kg/hr).

4. Steam Distributors tube made of stainless steel.

5. Steam inlet and end cap made of fine rated plastic.

6. Distributor is adjustable for horizontal or downflow application.

A B C Length – in. (mm)

Dimensions – in (mm) Minimum Duct

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Figure 7. Distributor Dimensions (Sheet 2 of 3)

Distributor

Model

CSD 24 1.75 (44) 1.55 (39) 20 (508) 24 (305) CSD 30 2 (51) 2 (51) 26 (406) 30 (457) CSD 36 2 (51) 2 (51) 32 (508) 36 (609) CSD 42 2.25 (57) 2 (51) 38 (660) 42 (762) CSD 48 2.25 (57) 2 (51) 44 (813) 48 (914) CSD 54 2.25 (57) 2 (51) 50 (965) 54(1066) CSD 60 2.5 (64) 2.5 (64) 56 (1118) 60 (1219) CSD 66 2.5 (64) 2.5 (64) 62 (1270) 66 (1371) CSD 72 2.5 (64) 2.5 (64) 68 (1422) 72 (1524) CSD 78 3 (76) 2.5 (64) 74 (1575) 78 (1676) CSD 84 3 (76) 2.5 (64) 80 (1727) 84 (1828) CSD 90 4 (102) 3 (76) 86 (1880) 90 (1981) CSD 96 4 (102) 3 (76) 92 (2032) 96 (2133)

CSD 102 4 (102) 3 (76) 98 (2184) 102 (2286) CSD 108 4 (102) 3 (76) 104 (2337) 108 (2438) CSD 114 5 (127) 4.5 (114) 110 (2489) 114 (2590) CSD 120 5 (127) 4.5 (114) 116 (2945) 120 (3046) CSD 126 5 (127) 4.5 (114) 122 (3097) 126 (3198) CSD 132 6 (152) 5.5 (140) 128 (3249) 132 (3350) CSD 138 6 (152) 5.5 (140) 134 (3401) 138 (3502) CSD 144 6 (152) 5.5 (140) 140 (3553) 144 (3654)

A B C Length – in. (mm)

Dimensions – in (mm) Minimum Duct

Figure 8. Distributor Dimensions (Sheet 3 of 3)

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Duct Width A B C Duct Height D (Tube Height) E min. E max. in cm in cm in cm in cm in cm in cm in cm in cm

18 45.7 13 1/8 33.3 14 7/8 37.8 16 1/4 41.3 18 45.7 6.25 15.9 17.063 43.3 24.604 62.5 24 61.0 19 1/8 48.6 20 7/8 53.0 22 1/4 56.5 24 61.0 12.25 31.1 23.063 58.6 30.604 77.7 30 76.2 25 1/8 63.8 26 7/8 68.3 28 1/4 71.8 30 76.2 18.25 46.4 29.063 73.8 36.604 93.0 36 91.4 31 1/8 79.1 32 7/8 83.5 34 1/4 87.0 36 91.4 24.25 61.6 35.063 89.1 42.604 108.2 42 106.7 37 1T/8 94.3 38 7/8 98.7 40 1/4 102.2 42 106.7 30.25 76.8 41.063 104.3 48.604 123.5 48 121.9 43 1/8 109.5 44 7/8 114.0 46 1/4 117.5 48 121.9 36.25 92.1 47.063 119.5 54.604 138.7 54 137.2 49 1/8 124.8 50 7/8 129.2 52 1/4 132.7 54 137.2 42.25 107.3 53.063 134.8 60.604 153.9 60 152.4 55 1/8 140.0 56 7/8 144.5 58 1/4 148.0 60 152.4 48.25 122.6 59.063 150.0 66.604 169.2 66 167.6 61 1/8 155.3 62 7/8 159.7 64 1/4 163.2 66 167.6 54.25 137.8 65.063 165.3 72.604 184.4 72 182.9 67 1/8 170.5 68 7/8 174.9 70 1/4 178.4 72 182.9 60.25 153.0 71.063 180.5 78.604 199.7 78 198.1 73 1/8 185.7 74 7/8 190.2 76 1/4 193.7 78 198.1 66.25 168.3 77.063 195.7 84.604 214.9 84 213.4 79 1/8 201.0 80 7/8 205.4 82 1/4 208.9 84 213.4 72.25 183.5 83.063 211.0 90.604 230.1 90 228.6 85 1/8 216.2 86 7/8 220.7 88 1/4 224.2 90 228.6 78.25 198.8 89.063 226.2 96.604 245.4 96 243.8 91 1/8 231.5 92 7/8 235.9 94 1/4 239.4 96 243.8 84.25 214.0 95.063 241.5 102.604 260.6 102 259.1 97 1/8 246.7 98 7/8 251.1 100 1/4 254.6 102 259.1 90.25 229.2 101.063 256.7 108.604 275.9 108 274.3 103 1/8 261.9 104 7/8 266.4 106 1/4 269.9 108 274.3 96.25 244.5 107.063 271.9 114.604 291.1 114 289.6 109 1/8 277.2 110 7/8 281.6 112 1/4 285.1 114 289.6 102.25 259.7 113.063 287.2 120.604 306.3 120 304.8 115 1/8 292.4 116 7/8 296.9 118 1/4 300.4 120 304.8 108.25 275.0 119.063 302.4 126.604 321.6 126 320.0 121 1/8 307.7 122 7/8 312.1 124 1/4 315.6 126 320.0 114.25 290.2 125.063 317.7 132.604 336.8 132 335.3 127 1/8 322.9 128 7/8 327.3 130 1/4 330.8 132 335.3 120.25 305.4 131.063 332.9 138.604 352.1 138 350.5 133 1/8 338.1 134 7/8 342.6 136 1/4 346.1 138 350.5 126.25 320.7 137.063 348.1 144.604 367.3 144 365.8 139 1/8 353.4 140 7/8 357.8 142 1/4 361.3 144 365.8 132.25 335.9 143.063 363.4 150.604 382.5

Figure 9. SAM-e General Dimensions

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Duct Width A Duct Height B C

in cm in cm in cm in cm in cm

12 30.5 11 1/16 28.1 8 20.3 7 7/8 20.0 4 7/16 11.3 18 45.7 17 1/16 43.3 10 25.4 9 7/8 25.1 6 7/16 16.4 24 61.0 23 1/16 58.6 12 30.5 11 7/8 30.2 8 7/16 21.4

14 35.6 13 7/8 35.2 10 7/16 26.5

16 40.6 15 7/8 40.3 12 7/16 31.6 18 45.7 17 7/8 45.4 14 7/16 36.7 20 50.8 19 7/8 50.5 16 7/16 41.8 22 55.9 21 7/8 55.6 18 7/16 46.8 24 61.0 23 7/8 60.6 20 7/16 51.9

Figure 10. General Mini SAM-e Dimensions

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