nhrs series - ontimemall.commanual no. h-103 253-0618 2008-02-11 nhrs series resistive element steam...
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Manual No. H-103 253-06182008-02-11
NHRSSeries RESISTIVE ELEMENTSTEAM HUMIDIFIER
Installation Manual
TM
2008-02-11
PROPRIETARY NOTICEThis document and the information disclosed herein are proprietary data of WALTER MEIER LTD. Neither this document nor the information contained herein shall be reproduced used, or disclosed to others without the written authorization of WALTER MEIER LTD., except to the extent required for installation or maintenance of recipient’s equipment. All references to the NORTEC name should be taken as referring to WALTER MEIER LTD.
LIABILITY NOTICENORTEC 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.
COPYRIGHT NOTICECopyright 2008, WALTER MEIER LTD. All rights reserved.
RECORD OF REVISIONSFor each revision, put the revised pages in your manual and discard the superseded pages. Write therevision number and revision date, date put in manual, and the incorporator’s initials in the applicablecolumns on the Record of Revisions.
Revision Number
Revision Date
Date Put In Manual By
Revision Number
Revision Date
Date Put In Manual By
10-00Page vii
2006-08-01
TABLE OF CONTENTS
Subject Page
10-00 INTRODUCTION 1. PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
A. RECEIVING & UNPACKING EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32. PACKAGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
A. GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3B. HUMIDIFIER AND CONTROL BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3C. DISTRIBUTOR BOX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. PRE-INSTALLATION EQUIPMENT VERIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5A. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
10-10 INSTALLATION PROCEDURES 1. HUMIDIFIER INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
A. LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2B. MOUNTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2C. WATER SUPPLY LINE - POTABLE WATER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3D. WATER SUPPLY LINE - DE-IONIZED WATER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . 3E. WATER DRAIN LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5F. STEAM LINES AND CONDENSATE RETURNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5G. ELECTRICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10H. CONTROL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10I. DEMAND SIGNAL CONTROLS INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10J. HUMIDITY TRANSDUCER SIGNAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10K. OPTIONAL OUTDOOR TEMPERATURE RESET FUNCTION . . . . . . . . . . . . . . . . . . . . . . . 14L. HUMIDITY TRANSDUCER SIGNAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2. STEAM DISTRIBUTOR INSTALLATION FOR THE ASD, BSD, CSD . . . . . . . . . . . . . . . . . . . . . 16A. STEAM DISTRIBUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16B. DISTRIBUTOR CHARACTERISTICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16C. DISTRIBUTOR LOCATIONS AND MOUNTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16D. MULTIPLE DISTRIBUTOR APPLICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17E. LOCATION OF STEAM DISTRIBUTORS WITHIN AN AIR HANDLER . . . . . . . . . . . . . . . . . 20F. DISTRIBUTOR ABSORPTION DISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20G. TYPICAL APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20H. DISTRIBUTORS DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3. SAM-E SHORT ABSORPTION MANIFOLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22A. IN-DUCT INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22B. OUTSIDE DUCT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26C. VERTICAL IN-DUCT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27D. DRAIN WATER COOLING OPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4. BLOWER PACKS (BOBP, RMBP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30A. BLOWER PACKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30B. PRIMARY VOLTAGE CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10-00Page viii2006-08-01
Subject Page
10-20 OPERATION1. OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
A. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2B. LAYOUT AND FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2C. STEAM GENERATION REGULATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3D. FLUSHING NHRS WITH SCALE MANAGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. NHRS OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3A. STARTING OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3B. SYSTEM START-UP TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4C. INITIAL START-UP PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5D. DISPLAY MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
10-30 MAINTENANCE PROCEDURES1. NHRS MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
A. MINOR MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2B. MAJOR MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
10-40 TROUBLESHOOTING1. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22. START-UP CHECK LISTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73. MAINTENANCE CHECK LISTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
10-50 TECHNICAL1. EXPLODED VIEWS - PLUMBING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22. EXPLODED VIEWS ELECTRICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
WARRANTY
10-00Page ix
2006-08-01
LIST OF FIGURES
Figure Page
10-00 INTRODUCTION
Figure 1. NHRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Figure 2. Humidifier Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Figure 3. Distributor Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Figure 4. SAM-e Distributor Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Figure 5. Remote Mounted Blower Pack Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Figure 6. Typical NHRS Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Figure 7. Typical NHRS Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
10-10 INSTALLATION PROCEDURES
Figure 1. Plumbing Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Figure 2. Steam Run and Condensate Return Installation Guidelines . . . . . . . . . . . . . . . . . 7Figure 3. Steam Run and Condensate Return Installation Guidelines . . . . . . . . . . . . . . . . . 8Figure 4. Primary Voltage Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 5. On/Off Guidelines and Low Voltage Terminal Strip. . . . . . . . . . . . . . . . . . . . . . . 12Figure 6. NORTEC Control Guidelines and Wiring (Optional) . . . . . . . . . . . . . . . . . . . . . . 13Figure 7. Setpoint vs. Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 8. Nortec Humidity Transducer Guidelines and Wiring (Option) . . . . . . . . . . . . . . . 15Figure 9. Leveling the Distributor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 10. Single Steam Distributor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 11. Multiple Steam Distributor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Figure 12. Cutting Duct for Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Figure 13. Best Location for Multiple Steam Distributors . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 14. Roof Top Units 2-20 Tons - Typical Location . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 15. Small Unit on Residential Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Figure 16. SAM-e Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 17. Steam Tube Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 18. Top Steam Tube Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 19. Adjustable Mounting Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 20. Typical SAM-e Duct Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figure 21. Outside Duct Mounting Cover Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Figure 22. Vertical Duct Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Figure 23. Drain Water Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29Figure 24. NHRS with Remote Pack Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10-20 OPERATION
Figure 1. NHRS Maintenance Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Figure 2. Drain Interval Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Figure 3. Control Signal Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
10-00Page x2006-08-01
10-30 MAINTENANCE PROCEDURES
Figure 1. Minor Maintenance with Scale Management Option. . . . . . . . . . . . . . . . . . . . . . . 4
10-40 TROUBLESHOOTING
Figure 1. Wiring Diagram - NHRS 010-090 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Figure 2. Wiring Diagram - NHRS 135-180 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
10-50 TECHNICAL
Figure 1. Plumbing Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Figure 2. Electrical Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
10-00Page xi
2006-08-01
LIST OF TABLESTable Page
10-10 INSTALLATION PROCEDURES
Table 1. Maximum Recommended Length of Steam Line . . . . . . . . . . . . . . . . . . . . . . . . . 6Table 2. Steam Line Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Table 3. Recommended Materials and Sizes for Steam Runs . . . . . . . . . . . . . . . . . . . . . . 6Table 4. Recommended Condensate Line at Distributor(s) . . . . . . . . . . . . . . . . . . . . . . . . 9Table 5. Equivalent Lengths of Elbows and tee Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Table 6. Humidifier and Distributor Inlet/Outlet Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Table 7. Ceiling and Frontal Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10-20 OPERATION
Table 1. NHRS Operational Status LED’s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Table 2. Remote Fault Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Table 3. Water Quality. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
10-40 TROUBLESHOOTINGTable 1. Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
10-50 TECHNICALTable 1. Plumbing Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Table 2. Electrical Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
10-00 Page 1 2008-02-11
10-00 INTRODUCTION
10-00 Page 2
2008-02-11
Figure 1. NHRS
10-00 Page 3 2008-02-11
1. PRE-INSTALLATION A. RECEIVING & UNPACKING EQUIPMENT
(1) Check packing slip to ensure ALL material has been delivered. All material shortages are to be reported to NORTEC within 48 hours from the receipt of good. NORTEC assumes no responsibility for any material shortages beyond this period.
(2) Inspect shipping boxes for damage and note damages on shipping waybill accordingly. After unpacking, inspect equipment for damage. If damage is found notify shipper promptly. All NORTEC products are shipped on a FOB factory basis. Any and all damage, breakage or loss claims are to be made directly to the shipping company.
2. PACKAGING
A. GENERAL (1) The equipment packaging is standardized in that each box will contain the same
base content. The following paragraphs identify the content of each box.
B. HUMIDIFIER AND CONTROL BOX (1) The typical equipment found in the humidifier and control box are shown in
Figure 2. The contents are listed on the box. If controls and any other small accessories are placed in the box they will be listed on the box.
C. DISTRIBUTOR BOX (1) Depending on the equipment ordered the following distributor box configurations
may be received.
(2) For equipment received if an ASD, BSD, CSD distributors are ordered refer to Figure 3.
(3) For equipment received if a SAM-e is ordered refer to Figure 4.
(4) For equipment received if a RMBP is ordered refer to Figure 5.
10-00 Page 4
2008-02-11
H09
6
BOX WITHABBREVIATEDINSTRUCTIONS AND BOX CONTENTSTICKERS
CONTROLS(IF ORDEREDONLY)
BAG WITHMANUAL,CLAMPS,HOSE SECTION
HUMIDIFIER
STEAM HOSESECTION (NOTSUPPLIED IF BUILTON BLOWER PACKORDERED)
Figure 2. Humidifier Box
Figure 3. Distributor Box
Figure 4. SAM-e Distributor Box
Figure 5. Remote Mounted Blower Pack Box
10-00 Page 5 2008-02-11
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.
10-00 Page 6
2008-02-11
H11
8-1
0.313 IN. UNC
MOUNT LEVEL
TO DRAIN
12.000 IN.TO TOPOF TRAP
TRAP CONDENSATEBEFORE DISTRIBUTORAT END OF ANY DOWNSLOPE
TO DRAIN
12.000 IN.TO TOPOF TRAP
ATMOSPHERIC STEAM INLETUSE NORTEC SUPPLIED STEAM
HOSE AND GEAR CLAMPS
12.000 IN. MIN
6.000 IN. MINAIR GAP
ATMOSPHERIC STEAM INLETUSE NORTEC
SUPPLIED STEAM HOSE AND
GEAR CLAMPS
MAIN RULES FOR ATMOSPHERIC STEAM LINES1- SLOPE THE STEAM LINES2- TRAP CONDENSATE 3- INSULATE WITH 1 IN. PIPE INSULATION4- FOLLOW RECOMMENDED MATERIALS, SIZE AND LENGTH
SLOPING STEAM LINES
2 DEGREES
12.000 IN.2.000 IN.
10 DEGREES
12.000 IN.0.500 IN.
SLOPE UP WITH STEAM
SLOPE DOWN WITH STEAM
STEAM DIRECTION
STEAM DIRECTION
INSULATE WITH 1.000 IN. PIPE INSULATION
METHOD FOR TRAPPING CONDENSATE
THERE MUST BEA 12.000 IN. DROPTO THE CENTEROF THE ‘P’ TRAP
‘P’ TRAP MUST BE6.000 IN. OR GREATER
THE TEE TRAP ISA FULL SIZED ‘T’ FITTING
OR
TO TRAP AND DRAIN
MOUNT DISTRIBUTORS LEVEL
SHORT ABSORPTION MANIFOLDCH. 10-10 P. 23-29
STEAM LINES AND CONDENSATE RETURNSCH. 10-10 P. 6-7
Figure 6. Typical NHRS Installation (Sheet 1 of 2)
10-00 Page 7 2008-02-11
H11
8-2
ON
OFF
L1
L2
GROUNDGROUND WIRE GROUND
LEG2 POLETERMINALBLOCK
DEDICATEDCIRCUIT
BREAKER OR
DISCONNECT
- SINGLE PHASE UNIT.- SINGLE PHASE SUPPLY.- REQUIRED VOLTAGE BETWEEN L1 AND L2.- LOAD BALANCED.
EXT
INT
L1
L2
GROUNDGROUND WIREGROUND LEG
3 POLETERMINALBLOCK
- 3 PHASE UNIT.- 3 PHASE SUPPLY.
- REQUIRED VOLTAGE BETWEEN ANY TWO LEGS.- LOAD WILL BE BALANCED.
L3
NEUTRALEXT
INT
DEDICATEDCIRCUIT
BREAKER OR
DISCONNECT
12.000 IN. BEFORE
ANY BEND
2 3 4 5 6EXTERNALINTERNAL
5 VD
C
7
_ _
CO
NTR
OL
SIG
NAL
(+)
SAF E
TY O
N/O
FF L
OO
P
2 4 VA
C
1
NHRS TERMINAL
CO
NTR
OL
(- )
{MODULATIONTERMINALS
ON/OFFTERMINALS
ELECTRICAL CH. 10-10
CONTROLS CH. 10-10
Min
imum
24.0
00 IN
.
Minimum36.000 IN.
Minimum36.000 IN.
BOTTOM CLEARANCE
FRONT AND
CLEARANCES
BLOWER PACKS CH. 10-10
WIRE TERMINALS 82-83 ON BLOWER PACK IN SERIES WITH ON/OFF LOOP ON THE HUMIDIFIER (TERMINAL 1-2)
Figure 7. Typical NHRS Installation (Sheet 2 of 2)
10-00 Page 8
2008-02-11
THIS PAGE INTENTIONALLY LEFT BLANK
10-10 Page 1 2008-02-02
10-10 INSTALLATION PROCEDURES
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1. HUMIDIFIER INSTALLATION A. LOCATION
(1) The NORTEC NHRS series humidifier is designed to mount on a suitable wall or vertical surface. Do not sit the unit on the floor due to clearances required for plumbing and electrical connections. The clearance dimensions shown in this manual are for reference only and are the minimum required for maintenance on the humidifier. Local and national codes should be consulted before final location and installation of the humidifier. NORTEC cannot accept responsibility for installation code violations.
(2) The location of the humidifier should be below the steam distributor. DO NOT locate the humidifier any further then absolutely necessary from the steam distributor location as net output will be reduced as a result of heat loss through the steam line.
(3) When possible, mount the NHRS humidifier at a height convenient for servicing.
B. MOUNTING (1) The NHRS series humidifier is wall mounted using keyholes located on the back
of the unit’s cabinetry. The keyholes are spaced 16 inches apart center to center as per UL certification standard stud spacing dictates.
(2) Use #12 x 3 in. screws. 2 screws are needed for a single unit (NHRS 010 to 090 lbs/hour). 3 screws are needed for a double unit (NHRS 135 to 180 lbs/hour). Insert the screw 16 in. apart. Be sure the screws are level to each other. Proceed to insert the screws into the studs until there is 1/4 in. of screw exposed. Ensure the screws are properly anchored to the wall.
(3) Raise the unit. Align the keyholes on the back of the unit with the screws. Place the screws through the keyholes. Make sure the unit is level then tighten the screws to secure the unit in place.
(4) Once the unit is securely fixed to the wall. Install the “L” shaped brackets into the same studs the unit is attached to. Place the brackets on top of the unit inline with the studs. Using the appropriate sized wood screw fasten the “L” brackets to the studs securing the unit from any upward motion.
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C. WATER SUPPLY LINE (Potable Water Supply) (1) All water supply and drain line connections should be installed in accordance
with local building codes. (2) It is always recommended to install a manual shut off valve on the fill water
supply line dedicated to the humidifier to facilitate servicing. Use 1/2 in. outside diameter copper piping to the humidifier. See Figure 1 for further detail.
D. WATER SUPPLY LINE (De-ionized Water Supply) (1) All water supply and drain line connections should be installed in accordance
with local building codes. (2) It is always recommended to install a manual shut off valve on the fill water
supply line dedicated to the humidifier to facilitate servicing. Use 1/2 in. plastic or stainless steel tubing to connect to the humidifier. See Figure 1 for further detail.
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SUPPLY PRESURE 30-80 PSIG
SUPPLY PRESURE 30-80 PSIG
SUPPLY DRAIN COOLING
POTABLE WATER**
PLUMBINGALL PLUMBING IS TO BEPREFORMED BY A LICENCESPLUMBER
CAUTIONALL WORK SHOULD BE DONE ACCORDING TO LOCAL PLUMBING CODE. DRAIN WATER CAN BE VERY HOT DO NOT DRAIN INTO A PUBLIC SINK
AIR GAP REQUIRED.A MIN. 2.0 in. TO 0.875 in. COPPER REDUCERIS IDEAL FOR THIS APPLICATION.NORTEC P/N 252-2172
ALWAYS INSTALL AWATER SHUT OFFVALVE
RO, DI ORPOTABLE WATER**
0.875 in OD MIN. DRAIN LINEKEEP AS SORT AS POSSIBLEALWAYS SLOPE DOWNWARD
0.500 in NPTUSE UNION TOCONNECT PIPETO UNIT
PIPE AND WATER SHUT-OFF VALVE NOT SUPPLIED BY NORTECFEED RO OR DI WATER ONLY TO SUPPLY. DRAIN WATER COOLER SHOULD USE POTABLE WATER.ENSURE ALL RO AND DI SUPPLY PIPING AND HARDWAREARE OF SUITABLE MATERIAL. E.g. PLASTIC OR STAINLESSFOR BOTH INLETS.
1.5 in. OD. ON THREADED OUTLET WITH FACTORY SUPPLIED HOSE AND CLAMP
Figure 1. Plumbing Connections
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E. WATER DRAIN LINE (1) All water supply and drain line connections should be installed in accordance
with local building codes. (2) The NHRS comes equipped with a 1-1/2 in. drain outlet on the under side of the
drain canal. Attach the factory supplied 1-1/2 in. hose to the drain outlet. (3) A 1 in. air gap is needed in the drain line to prevent any backflow or siphoning
from occurring. It is recommended to place this air gap as close to the unit as possible to limit any chance of siphoning. A copper funnel should be used reducing the drain line to a minimum of 2 in. pipe. If DI or RO water is used, stainless steel is recommended for the drain line and funnel. Purified water will deteriorate copper over time and use. See Figure 1 for further detail.
(4) The drain line should not end in a sink used frequently by personnel, or where plumbing codes prohibit it, route to a floor drain or equivalent for safety reasons.
F. STEAM LINES AND CONDENSATE RETURNS
(1) Tables 1 through 5 indicate what material and recommended length to use when installing atmospheric steam lines. The lengths mentioned are equivalent feet and therefore the full length of steam line includes the addition of the equivalent length of all elbows and tees.
(2) Figure 2 and Figure 3 illustrates the guidelines for installation, routing and trapping of the steam lines and condensate returns.
(3) Table 6 indicates steam outlet size of the humidifier and steam inlet size of the distributor.
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Table 1. Maximum Recommended Length of Steam Line NHRS unit size Steam Output Distance Possible Loss Steam Line Size
010 10 lbs 15 2 1 ½” 015 15 lbs 17.5 2.25 1 ½” 020 20 lbs 20 2.5 1 ½” 030 30 lbs 25 3 1 ½” 045 45 lbs 35 4 to 5 1 ½” 065 65 lbs 45 5 to 10 1 ½” 090 90 lbs 50 5 to 10 1 ½” 135 135 lbs 50ft/cylinder 5 to 10 2 x 1 ½” 180 180 lbs 50ft/cylinder 5 to 10 2 x 1 ½”
Notes: 1. This chart gives the maximum length of recommended steam line by unit size. 2. The use of steam line other then copper, stainless steel and Nortec steam hose
will void the warranty and may cause adversely effect the operation of the humidifier
3. The NHRS 135 and 180 are dual units.
Table 2. Steam Line Materials
NORTEC Steam Line Copper Tube (Potable) Stainless Steel Tube (RO or DI)
Short Run < 10 feet (3m) yes yes yes Long Run > 10 feet (3m) no yes yes
Table 3. Recommended Materials and Sizes for Steam Runs
Unit Size Steam Run lbs/hr kg/hr ft m
Steam Line Material Steam Line Description
0-30 0-13 0-10 0-3 Copper Tube 1.500 in MED-L Tubing (1.625 inch OD)
Potable 0-30 0-13 10-30 3+ Copper Tube 2.0 inch MED-L Tubing
(2.125 inch OD)
0-30 0-13 0-10 0-3 Stainless Steel Tube 1.750 inch Tube x 0.065 inch thick
RO or DI 0-30 0-13 10-30 3+ Stainless Steel Tube 2 inch Tube x
0.065 inch thick
50-100 22-45 0-20 0-6 Copper Tube 1.500 in MED-L Tubing (1.625 inch OD)
Potable 50-100 22-45 20+ 6+ Copper Tube 2.0 inch MED-L Tubing
(2.125 inch OD)
50-100 22-45 0-20 0-6 Stainless Steel Tube 1.750 inch Tube x 0.065 inch thick
RO or DI 50-100 22-45 20+ 6+ Stainless Steel Tube 2 inch Tube x
0.065 inch thick
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Figure 2. Steam Run and Condensate Return Installation Guidelines (1 of 2)
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Figure 3. Steam Run and Condensate Return Installation Guidelines (2 of 2)
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Table 4. Recommended Condensate Line at Distributor(s)
Dispersion Method Condensate Hose Copper Tube (Potable) Stainless Steel Tube (RO or DI)
1 x Steam Distributor 0.375 inch NORTEC 132-8840
0.250 inch. MED-L Tubing (0.375 inch OD) 0.375 Tube 0.049 inch thick
3 x Steam Distributor 0.375 inch NORTEC 132-8840
0.500 inch. MED-L Tubing (0.875 inch OD) 0.650 Tube 0.049 inch thick
Note: *When using more then 1 steam distributor, the condensate line must be trapped before it is joined together. See figure 4
Table 5. Equivalent Lengths of Elbows and Tee Fittings
Nominal Tube Diameter
Standard 90degree Elbow
Standard 45 degree Elbow Side Outlet Tee
0.75 inch 2 feet 1 foot 4 feet 1.5 inch 3.5 feet 1.75 feet 7 feet 3 inch 5 feet 2.5 feet 11 feet 4 inch 8 feet 4 feet 15 feet
Table 6. Humidifier and Distributor Inlet/Outlet Sizes
Humidifier Steam Outlet Distributor Steam Inlet NHRS 010-090 1.500 inch ASD, BSD 0.875 inch OD NHRS 135-180 2 x 1.500 inch CSD 1.75 inch OD
Blower Pack 0.875 inch OD or 1.75 inch OD
SAM-e 1.75 inch OD Mini SAM-e 0.875 or 1.75 inch OD
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G. ELECTRICAL (1) Local electrical codes should always be followed when installing a NORTEC
Humidifier. Direct wiring to the high voltage terminal is shown in Figure 5.
H. CONTROL WIRING
(1) Controls are available from NORTEC as accessories. If controls were not ordered with the humidifier they must be purchased or supplied by others. The following information is relevant to all controls, factory supplied or otherwise.
I. DEMAND SIGNAL CONTROLS INSTALLATION (1) Figure 6 uses the NORTEC optional controller to demonstrate the typical
demand signal installation. J. HUMIDITY TRANSDUCER SIGNAL INSTALLATION
(1) Figure 8 displays NORTEC optional humidity transducer installation.
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H07
2
L1
L2
GROUNDGROUND WIRE GROUND
LEG2 POLETERMINALBLOCK
DEDICATEDCIRCUIT
BREAKER OR FUSED
DISCONNECT
- SINGLE PHASE UNIT.- SINGLE PHASE SUPPLY.- REQUIRED VOLTAGE BETWEEN L1 AND L2.- LOAD BALANCED.
L1
L2
GROUNDGROUND WIRE
- SINGLE PHASE UNIT.- 3 PHASE SUPPLY.
- REQUIRED VOLTAGE BETWEEN L1 AND L2.- LOAD WILL BE UNBALANCED.
L3NEUTRAL
NOTE: VOLTAGE AT TERMINAL BLOCK MUST BE IN ACCORDANCE WITH LABELALL WIRING TO BE IN ACCORDANCE WITH EXISTING NATIONAL AND LOCAL ELECTRICAL CODES.
SPECIFICATION
L1
L2
GROUND WIREGROUND
- 3 PHASE UNIT.- 3 PHASE SUPPLY.
- REQUIRED VOLTAGE BETWEEN ANY TWO LEGS.- LOAD WILL BE BALANCED.
L3
NEUTRAL
PRIMARY (LINE) VOLTAGE WIRING TO UNIT
EXT
INT
EXT
INT
EXT
INT
DEDICATEDCIRCUIT
BREAKER OR FUSED
DISCONNECT
DEDICATEDCIRCUIT
BREAKER OR FUSED
DISCONNECT
(BY OTHERS)
ON
OFF
A DEDICATED EXTERNAL FUSED DISCONNECT MUST BE INSTALLED. DO NOT EXCEED THE MAXIMUM CIRCUITPROTECTION AMPS ASINDICATED ON THE
LABEL.SPECIFICATION
ENSURE THAT ADEQUATE POWER SUPPLY IS AVAILABLE TO CARRY FULL HUMIDIFIER AMPERAGE DRAWN AS SPECIFIED BY SPECIFICATION LABEL.
OPTIONAL INTERNAL FUSES ARENOT INTENDED TO SUBSTITUTE FOREXTERNAL FUSES. THIS OPTIONIS STRICTLY TO PROVIDEPROTECTION FOR THE INTERNALWIRES INDIVIDUALLY.
WIRING TO BE PERFORMED BYA LICENSED ELECTRICIAN.
GROUNDLEG2 POLETERMINALBLOCK
GROUNDLEG
3 POLETERMINALBLOCK
Figure 4. Primary Voltage Supply
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Figure 5. On/Off Guidelines and Low Voltage Terminal Strip
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Figure 6. NORTEC Control Guidelines and Wiring (Optional)
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K. OPTIONAL OUTDOOR TEMPERATURE RESET FUNCTION NOTE
Order Outdoor Temperature sensor separately, Part Number #252-0263
(1) Each humidistat and controller is equipped with an integrated reset function that will lower the set point during cold weather operation. This will prevent condensate from forming on the windows and building structures. Figure 7 illustrates how the setpoint-reset feature operates.
(2) Removing the jumper from terminals 8 and 1 on the humidistat controller enables this Outdoor Temperature Setback option. The Outdoor Temperature Sensor is then wired to these terminals.
(3) When the outdoor Temperature setback feature is in effect, the humidistat will normally display the calculated setpoint limit based on the outdoor air temperature. A snowflake will also be displayed to indicate cold weather operation. When any key on the controller is pressed, the LCD screen will display the customer specified setpoint for a short duration.
L. HUMIDITY TRANSDUCER SIGNAL INSTALLATION (1) Figure 8 displays NORTEC optional humidity transducer installation.
Figure 7. Setpoint vs. Outdoor Temperature
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Figure 8. NORTEC Humidity Transducer Guidelines and Wiring (Option)
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2. STEAM DISTRIBUTOR INSTALLATION FOR THE ASD, BSD, CSD A. STEAM DISTIBUTION
(1) NORTEC’s steam distributors are a proven design for the introduction of atmospheric steam into ducts.
(2) Features and benefits of steam distribution include:
(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 heat transfer coefficient reduces ‘radiator effect and condensate’ and result in higher efficiency of humidifier output while reducing condensate formation.
(d) Designed specifically for atmospheric steam distribution.
(e) Modularity so that the exact quantity of distributors can be configured to meet specific application requirements, to reduce system complexity and installation costs.
B. DISTRIBUTOR CHARACTERISTICS (1) NORTEC steam distributors are constructed of stainless steel and include a low
point condensate return to prevent the condensate from collecting in the steam distributor. This allows the condensate to settle at the bottom of the steam distributor where it is removed by the condensate return.
(2) Ensure the total capacity of the humidifier is not higher then the allowable maximum steam capacity of the following distributors:
(a) ASD: 25 lbs/hour (9 kg/hour)
(b) BSD: 35 lbs/hour (13 kg/hour)
(c) CSD: 115 lbs/hour (45 kg/hour)
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 100% 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 Figures 10 & 11). Laminar airflow is best. Downstream obstructions must be considered. Non-absorbed steam may affect devices such as smoke detectors downstream. Total steam absorption must be accomplished before filters and silencers.
(2) Distributors come complete with mounting plate. (See Figure 12). Most ducts and plenums are rigid enough to support the distributor.
(3) Longer distributors (more than 36 in.) and distributors mounted on lighter gauge sheet metal which cannot support the distributor level in the duct will need to be supported at the end. (See Figure 9).
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D. MULTIPLE DISTRIBUTOR APPLICATION
(1) The use of multiple steam distributors can reduce the absorption distance in most situations. (See Figure 11).
CAUTION THESE INSTALLATION GUIDELINE APPLY FOR DUCT VELOCITIES UNDER 2000 FT/MIN (610M/MIN), PLEASE CONSULT FACTORY FOR HIGHER VELOCITY.
CAUTION PLEASE MAKE SURE THAT NO OBSTACLES (ELBOW, FILTER, OR DIFFUSER) ARE LOCATED AFTER THE DISTRIBUTOR IN THE DIRECTION OF AIRFLOW CLOSER THAN THE ABSORPTION DISTANCE CALCULATED FOR YOUR APPLICATION.
CAUTION UNLESS YOU KNOW THE EXACT ABSORPTION DISTANCE REQUIRED FOR THE STEAM ABSORPTION INTO THE AIR STREAM, THE DISTRIBUTOR SHOULD BE LOCATED AT LEAST 8-10FT (2-3M) AWAY FROM ANY OBSTACLE IT MAY CONDENSE ON (ELBOW, DIFFFUSER, FILTER, ETC.)
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Figure 9. Leveling the Distributor
Figure 10. Single Steam Distributor
Figure 11. Multiple Steam Distributor
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Figure 12. Cutting Duct for Mounting
(2) Duct vertical clearance requirements for standard steam distributors are as follows. (a) ASD
• 8 in. vertical duct height for the 1st ASD
• 5 inches additional duct height for each additional ASD
• ROUNDDOWN (‘Duct height’ – 8 inch / 5 inches) + 1) (b) BSD
• 10 in. vertical duct height for the 1st BSD
• 6 inches additional duct height for each additional BSD
• ROUNDDOWN (‘Duct height’ – 10 inch / 6 inches) + 1) (c) CSD
• 14 in. vertical duct height for the 1st CSD
• 9 inches additional duct height for each additional CSD
• ROUNDDOWN (‘Duct height’ – 10 inch / 9 inches) + 1)
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E. LOCATION OF STEAM DISTRIBUTORS WITHIN AN AIR HANDLER (1) Humidify after the heating coil (H/C) so that absorption will occur before the
cooling 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 a minimum of 8 in. from the heating coil and evenly spaced. If downstream wetting is a problem, add more distributors. See Figure 13.
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. Consult the designing engineer or refer to the NHRS Engineering Manual.
G. TYPICAL APPLICATIONS
(1) Representations of typical applications are found in Figure 14 and Figure 15.
H. DISTRIBUTOR DIMENSIONS (1) Distributor dimensions for the various distributors can be found in the distribution
manual.
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Figure 13. Best Location for Multiple Steam Distributors
Figure 14. Roof Top Units 2-20 Tons – Typical Location
Figure 15. Small Unit on Residential Furnace
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3. SAM-e SHORT ABSORPTION MANIFOLD (1) Absorption distance is the minimum distance an obstruction can be placed
downstream of the SAM-e to prevent condensing on the obstruction.
(2) If any of the ducts of the AHU conditions are changed, the absorption distance may change due to a increase or decrease in the ducts temperature, amount of fresh air, various outside conditions, setpoint requirements, etc. If this occurs, re-calculate the absorption distance, and determine if the SAM-e needs to be modified or relocated.
A. IN-DUCT INSTALLATION (1) Without Mounting Frame
(a) Once you have selected the location of the manifold, use the supplied template to cut out the holes for the steam inlet and condensate drain outlet.
CAUTION DO NOT PULL OUT THE STEAM TUBES ONCE THEY HAVE BEEN INSTALLED INTO THE HEADER. THIS COULD DAMAGE TO GASKET.
(b) Insert all steam tubes into the main header, until the flange is flush with the rubber gasket. See Figure 16. Make sure that all nozzles offset each other by rotating the tubes. See Figure 17.
NOTES Appling water to the gasket will help to slide the tube into place. Do not lift the manifold by the steam tube when installing.
i. Fasten the top steam tube bracket to secure all steam tubes using a bolt, washer, and nut assembly. (Factory Supplied). See Figure 18.
ii. Fasten top steam tube bracket to the mounting frame using a bolt, washer, and nut assembly. If a mounting frame is not available, follow the drawing instructions in Figure 20.
iii. Insert the manifold into the duct and slide the steam inlet and condensate drain into the cut out holes. Mark the location of the 4 hole of the header-mounting bracket on the bottom of the duct.
iv. Drill 4 x 0.500 inch (12.7mm) holes at the marked location.
v. Fasten the header using a bolt, washer, and nut assembly (Field Supplied)
vi. Mount the field-supplied threaded rod to the top steam tube bracket to secure the assembly in place or refer to ‘Installation with adjustable mounting frame’ if mounting frame was provided. See Figure 20.
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(2) Installation with Adjustable Mounting Frame (Option, See Figure 19)
(a) Insert the side panel into the base.
(b) Fasten the pivoting head to the sliding panel with 0.375 in. UNC x 1 in. bolt, washer, and nut assembly (Factory Supplied).
(c) Fasten side frame to the base of the manifold with 0.375 in. bolt, nut, and washer assembly (Field Supplied)
(d) Fasten pivoting head to the top of the duct using bolt, nut, and washer assembly. (Field Supplied).
NOTES Appling water to the gasket will help to slide the tube into place. Do not lift the manifold by the steam tube when installing.
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Figure 16. SAM-e Tubes
Figure 17. Steam Tube Offset
Figure 18. Top Steam Tube Bracket
Figure 19. Adjustable Mounting Frame
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Figure 20. Typical SAM-e Duct Installation
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B. OUTSIDE DUCT INSTALLATION
(1) WITHOUT MOUNTING FRAME (a) Once you have selected the location of the manifold, cut out a 2 in. wide slot or a
2 in. diameter hole for each tube to be installed. (b) Insert all steam tubes into the main header, until flange is flush with the rubber
gasket. See Figure 16. Make sure all nozzles offset each other by rotating the steam tubes. See Figure 17.
NOTES Applying water to the gasket will help slide the steam tube into place. Do not lift the manifold by the steam tubes when installing. Optional cover plate to seal openings; see Figure 21 and Table 6.
(c) Slip steam tubes into the duct
(d) Drill 4 x 0.500 in. (12.7mm) holes into the duct to match the header mounting brackets.
(e) Fasten the header to the bottom of the duct using a bolt, nut, and washer assembly (field supplied).
Figure 21. Outside Duct Mounting Cover Plate
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(f) Fasten the top of the steam tube bracket to secure all steam tubes using a bolt, washer, and nut assembly. (Factory Supplied). See Figure 18.
(g) Fasten top steam tube bracket to side frame using bolt, washer, and nut assembly.
(h) Mount the field supplied rid to the top of the steam tube bracket to secure the assembly in place. Refer to Figure 20.
(2) INSTALLATION WITH ADJUSTABLE MOUNTING FRAME (Optional, See Figure 19).
(a) Insert the sliding panel into the base.
(b) Fasten the pivoting head to the sliding panel with 0.375 in. UNC x 1 in. bolt, nut, and washer assembly. (Factory Supplied).
(c) Mark the location of the 4 holes and drill 4 x 0.500 in. (12.7mm) holes
(d) Fasten the side frame to the base of the manifold with 0.375 in. UNC x 1 in. bolt, nut, and washer assembly. (Factory Supplied)
(e) Fasten the pivoting heads to the duct or air handler using a bolt, nut, and washer assembly (Field Supplied)
C. VERTICAL IN-DUCT INSTALLATION
NOTE Mounting Frame Required. (See Figure 22.)
(1) Once you have selected the location of the manifold, use the supplied template to cut out the holes for the steam inlet and condensate drain outlet.
(2) Reverse the direction of the header mounting bracket to accommodate a 10° minimum angle.
(3) Insert the sliding panel into the base of the SAM-e. (4) Fasten the pivoting head to the sliding panel using 0.375 inch UNC x 1 in. bolt,
nut, and washer assembly. (Factory Supplied). (5) Mark the location of the 4 holes and drill 4 x 0.500 inch (12.7mm) holes. (6) Fasten the side frame to the base of the manifold with 0.375 inch UNC x 1 in.
bolt, nut, and washer assembly. (Factory Supplied). (7) Insert the manifold into the duct and slide the steam inlet and condensate drain
into the cut out holes. Mark the location of the 4 holes of the mounting brackets and the 4 holes of the pivoting heads of the mounting frame to the sides of the duct.
NOTE Remember to keep a 10° angle to allow the condensate outlet to be at the lowest point.
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Figure 22. Vertical Duct Installation
(8) Drill 8 x 0.500 in. (12.7mm) holes to match the mounting bracket’s holes. (9) Fasten the manifold using a bolt, nut, and washer assembly. (Field Supplied).
CAUTION DO NOT PULL OUT THE STEAM TUBES ONCE THEY HAVE BEEN INSTALLED, THIS COULD DAMAGE THE GASKET
(10) Insert all steam tubes into the main header. Make sure all nozzles offset each other by rotating the steam tubes. See Figure 17.
(a) Applying water to the gasket will help slide the steam tube into place.
(b) Do not lift the manifold by the steam tubes when installing.
(c) Nozzles must be perpendicular to the airflow.
D. DRAIN WATER COOLING OPTION (a) Figure 23 displays the typical SAM-e drain water cooler installation.
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Figure 23. SAM-e Drain Water Cooling
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4. BLOWER PACKS (BOBP, RMBP)
WARNING STEAM DISTRIBUTOR ON THE BUILT-ON AND REMOTE MOUNTED 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 built-in air distribution systems. (2) Blower packs are available detached, field piped, and wired to the humidifier RMBP
or separate power source. See Figure 24.
(3) Blower packs consist of a steel cabinet containing: 3 axial blowers with finger guards powered by 120VAC or line voltage humidifiers, built-in multi-tap transformers (when necessary), fuse, high temperature plastic distributor with stainless steel lid, horizontal and vertical adjustment knobs for directional control, built-in thermostat to active blowers, and safety loop relay.
(4) Refer to Table 7 for ceiling and frontal clearances required for blower packs. Dimensions apply to both built-on and remote mounted blower packs.
(5) Mount remote blower packs with clearances as recommended in Table 7.
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Figure 24. NHRS with remote Blower Pack Option
Table 7. Ceiling and Frontal Clearances
NHRS Series Model Minimum Number of Blower Packs
Minimum Ceiling Clearance
Minimum Frontal Clearance
010 1 18 (45) 30 (76) 015 1 18 (45) 30 (76) 020 1 18 (45) 36 (91) 030 1 18 (45) 72 (183) 045 1 36 (91) 84 (213) 065 1 42 (106) 144 (366) 090 1 48 (122) 156 (396) 135 2 42 (106) 144 (366) 180 2 48 (122) 156 (396)
NOTES: 1. Clearances based on 72°F 35% relative humidity. 2. Remote mounted blower packs must be used for NHRS.
3. When there are clearance restrictions adding blower packs may resolve the problem. For example using 2 x 045 blower packs instead of 1 x 090 blower pack the ceiling clearance decreases to 36 inches and the frontal clearance to 84 inches.
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B. PRIMARY VOLTAGE CONNECTION (1) All blower packs have high efficiency blowers to minimize the frontal and overhead
clearances required to absorb the steam. (2) NH series remote mounted blower packs require field wiring between 2 primary
voltage terminal blocks and 2 low voltage control terminal strips; one of each is located in the humidifier and the remote mounted blower pack cabinet. To properly access the primary block on the humidifier, it may be necessary to remove the right side panel. To connect the primary wiring and control wiring feed the wire though the knockouts on the bottom and top of the humidifier. To access the blower pack terminal strip you must remove the cover. The primary voltage can come from a remote source as well.
NOTES Terminal block are pre-installed on units order with a remote mounted blower pack. Otherwise the terminal block will be provided.
Class 1 circuit wiring is require between humidifier and blower pack.
(4) Field wiring of remote mounted blower pack must conform to national and local electrical codes.
(5) For NH series use approved wire for power connections from 2 pole terminal block of the remote mounted blower pack to additional 2 pole terminal block inside the electrical section of the humidifier.
(6) For NH Series use approved wire to connect ground clamp of remote mounted blower pack to ground clamp provided in the electrical section of the humidifier.
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10-20 OPERATION
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1. OPERATION
A. INTRODUCTION (1) The NORTEC NHRS Series humidifier is a completely new design based on
up-to-date technology. The NHRS is designed to provide clean steam humidification at an economical price.
(2) The NHRS uses a microcomputer control system for greater flexibility. The
NHRS has a liquid crystal display (LCD) to indicate system messages and display RH.
B. LAYOUT AND FUNCTION
(1) The NHRS humidifiers consist of a plumbing and an electric compartment. In every case there is at least one steam distributor for installation in air ducts or blower packs (remote mounted: RMBP) for direct space humidification.
(2) Water enters the steam cylinder through the bottom via the fill cup assembly when the 24-volt fill valve solenoid is energized. The water is heated via electric element and produces sterile steam for distribution into the air.
(3) Primary electric power is applied to the heating elements in the steam cylinder when the on/off switch is pushed on and all control options are calling. A primary to 24-volt step-down transformer provides power to the contactor holding coil(s) via the main control board. The humidifier’s operating status is reported to the user by the green, red and yellow indicator lights on the front of the unit.
(4) The prerequisites for getting power and water into the steam cylinder are as follows:
(a) On/off switch must be switched on.
(b) Control circuit (Safety Loop) terminals 1-2 must be made.
(c) Door interlock switch must be made (interlock switch can be pulled out to operate unit).
(d) If modulating, demand signal must be present.
(e) Internal safeties must be made.
(5) The water level in the steam tank is continuously monitored with the level unit. The unit pulse fills based on steam production. The pulse filling in the unit varies depending on the water level detected by the float chamber. One magnetic float monitors five different water levels in the float chamber. The second float ensures the water level is always above the heating elements. The pressure equalizing pipe between the steam connection and the level unit ensures that the water levels are the same in the steam tank.
10-20 Page 3 2008-02-02
C. STEAM GENERATION REGULATION
(1) The steam is produced in the steam tank by resistive heating element technology. Steam production is fully variable from 3 to 100%.
D. FLUSHING - NHRS WITH SCALE MANAGEMENT (OPTIONAL)
(1) The evaporation process increases the concentration of minerals in the water of the steam cylinder. A suitable volume of water must be flushed through the steam cylinder from time to time and replaced by fresh water to ensure that this concentration does not exceed a specific value unsuitable for operation. The NHRS steam humidifier performs a flush cycle. This consists of the following two forms of flushing.
(a) Automatic flushing takes place as soon as the water in the steam cylinder exceeds the upper operating level (e.g. By foaming of the water).
(b) Flushing is a time dependent process at pre-selected time intervals. (c) Pre-determined time intervals are selected based on the water quality and the
operating data.
(2) The minerals precipitated by the evaporation process accumulate at the bottom of the steam cylinder. Units configured with the scale management option designed for operation with untreated water are equipped with a scale collector tank located directly underneath the steam cylinder. This way the minerals do not accumulate in the steam cylinder but mainly in the collector tank thus extending the time between service intervals and reducing the maintenance costs.
2. NHRS OPERATION
A. STARTING OPERATION
(1) The following procedure should be carried out in order to operate the steam humidifier:
(a) Examine the steam humidifier installation to ensure it has been installed properly. If any damage to the unit is discovered do not operate and contact factory.
CAUTION DAMAGED UNITS AND UNITS NOT INSTALLED PROPERLY MUST NOT BE ACTIVATED!
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(b) Turn manual shut off valve to the flow through position providing water to the unit.
(c) Switch on the external disconnect to provide voltage to the unit.
NOTE If the Scale Management Option is used make sure the valve on the NHRS mineral tank is closed
(d) Turn main power on via the rocker located on the keypad.
B. SYSTEM START-UP TEST
(1) The NHRS humidifier carries out a system test. The display below appears and
the three LEDs light for approx. 3 seconds.
NOTES If a fault is detected during the system test, a corresponding fault message is triggered.
If the system test is successful, the steam cylinder fills up and a float test is carried out (function check on the level unit). The display below appears.
NOTES If a fault is detected during the float test, a corresponding fault message is triggered.
When both tests are successful, the NHRS will enter normal operating mode. The display below appears and the green LED lights.
10-20 Page 5 2008-02-02
C. INITIAL START-UP PROCEEDURE (1) The following procedure should be carried out only on the first occasion that the
unit is operated:
(a) Check the function of the steam humidifier
1. Switch on the humidification by raising the set humidity value on the
humidity controller / humidistat / NHRS Display. 2. Switch off the humidification by lowering the set humidity value on the
humidity controller / humidistat / NHRS Display. 3. Check for correct functioning of the monitoring equipment (external safety
network). 4. Set the desired humidity value on the humidity controller/humidistat. 5. Make sure no leaks are present.
NOTE The heating current switches on as soon as the humidity controller/humidistat demands humidity. The yellow LED lights and steam is produced after a short delay (approx. 5 minutes).
(2) The operating status is displayed in the LED on the unit as follows
Table 1. NHRS Operational Status LED’s L.E.D ACTION MEANING Green Constant Unit Producing Steam Yellow Flashing Major or Minor Service Due.
Red Flashing The Unit is trying to self-correct a problem. Red Constant Insoluble Problem
NOTE: Relevant data will be displayed on the NHRS LCD display during normal operation and when in fault
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(3) If the steam humidifier is equipped with the optional remote operating and fault indication (option ”RFS”), the operating status will be shown as follows:
Table 2. Remote Fault Indication K1 Steam (N/O) Normally open
K2 Error (N/O) Normally open Or (N/C) Normally closed
K3 Service (N/O) Normally open Or (N/C) Normally closed
K4 Unit On (N/O) Normally open
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D. DISPLAY MENU
NOTE The NHRS unit has a “display menu” from which various operating parameters can be viewed. It is not possible to change the values on the display level.
(1) Display level Operation
(a) Call up the display level with < >or< >.
(b) < > next operating parameter.
(c) < > previous operating parameter.
(d) Exit the display level with <Menu>
(2) Description of the operating parameters on the display level
NOTE The following describes the individual operating parameters that can be selected using the keys < > and < >, after the display level has been called up.
(a) Steam Production
1. Current, actual, and nominal value of steam production are displayed in percentage of total output.
2. Nominal value Unit capacity x input signal value.
3. Actual value: max. Unit capacity x input signal value x capacity limitation.
NOTE If the internal controller is activated only the actual value is shown. Under the following conditions the actual value may differ from the nominal value: upon activation of the heating power, if capacity limitation is active during the filling cycle of the steam cylinder.
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(b) Analog Input (humidity demand)
1. Current value of the signal applied to the analog input in [%] of its max.
value.
NOTE If the internal controller is active the displayed value corresponds to the current air humidity (%rh).
(c) Internal Controller
1. Internal controller activated (”on”)/deactivated (”off”).
2. Activated with transducer signal.
3. Demand = de-activated.
(d) Working Hours
1. Total of working hours elapsed since initial commissioning of the steam humidifier.
(e) Time Remaining to minor/major service
1. The time remaining (in hours) before the next minor/major service.
NOTE Time to maintenance can be adjusted to suit water conditions
NOTE The stated times are based on 100% steam capacity. If the operation is at a lesser capacity, the time should be extended accordingly. The servicing intervals are set using the rotary switch “S2” on the control board.
10-20 Page 9 2008-02-02
0 200 hours 600 hours1 300 hours 600 hours2 300 hours 900 hours3 450 hours 900 hours4 400 hours 1200 hours5 600 hours 1200 hours6 500 hours 1500 hours7 750 hours 1500 hours8 3000 hours 3000 hours9 6000 hours 6000 hours
PositionS2
Interval MinorMaintenance
Interval MajorMaintenance
10 015 020 030 045 06 090 0
135 0180 0
S2 SettingNHRSModel
Value Setting
Factory Setting
NHRS Main PCB
Maintenance IntervalAdjustment [S2]
Figure 1. NHRS Maintenance Intervals
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(f) Drain Cycle
1. The following indications are provided for the set-flushing interval • Left: Switch setting on rotary switch “S1” (4 in example) • Right: Set flushing interval (120 in example)
NOTE The flushing interval is set on switch “S1” on the control board.
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Figure 2. Drain Interval Settings
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NOTE Water quality conditions resulting in component failures are not covered under Walter Meier’s standard warranty. The factory settings are based on the following water conditions when the unit leaves the factory.
Table 3. Water Quality
Water Parameters Potable Treated
Conductivity 0-1500 Micro Mhos 0-50 Micro Mhos
Hardness 12 grains per gallon 0 grains per gallon
Silica 12 ppm 0 ppm
PH 6.5-7.5 7
Chlorides > 50 ppm > 25 ppm
NOTE Should you have water conditions above the stated parameters consult the factory for a new blow-down setting to help improve your scale management. NORTEC recommends performing a semi-annual water analysis to ensure optimal performance.
(f) Stand-by Heating
1. Stand-by heating activated (”on”) deactivated (”off”).
NOTE If stand-by heating is active the water temperature in the steam cylinder is constantly kept at approximately 70ºC (158ºF) by the control board.
10-20 Page 13 2008-02-02
(g) Capacity Limitation
1. To change the Power Limit (Maximum Capacity) complete the following: • Press both arrow key simultaneously • Enter code “8808” • Change to desired value • Press both arrow keys simultaneously
(h) Inlet Valve Correction
1. Set inlet valve correction (cycle ratio) in % of standard setting value to
balance out water pressure variations.
(i) Soft Start
1. Soft Start activated (on), consult factory. Deactivated (off) factory
set.
(j) De-mineral Mode
1. De-mineral mode activated (on), consult factory. Deactivated (off)
factory set.
(k) Serial Interface
1. Serial Interface activated (on), consult factory. Deactivated (off) factory
set.
(l) Full Drain Cycle
1. Full Drain Cycle activated (on), consult factory. Deactivated (off) factory
set.
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Figure 3. Control Signal Setting
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(m) Flush Cycle
1. Flush Cycle activated (on), consult factory. Deactivated (off) factory
set.
(m) Control Signal
1. Range of the active analog signal in Volts or milliamps.
NOTE The range of the analog signal may be adjusted using the rotary switch “S3” on the control board.
(n) Software Version
1. Displays software version for the steam humidifier.
(o) Unit Type
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10-30 Page 1 2008-02-02
10-30 MAINTENANCE PROCEDURES
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WARNING A QUALIFIED SERVICE PERSON SHOULD PREFORM ALL MAINTENANCE ON THE HUMIDIFIER AND ANY OTHER EQUIPMENT PROVIDED BY NORTEC THAT REQUIRES MANTENANCE.
NOTE
Instruction and details concerning the maintenance of the NORTEC equipment must be observed and adhered to without fail. Only the maintenance documented in this manual must be carried out.
1. NHRS MAINTENANCE
A. MINOR MAINTENANCE NOTE
The NHRS will indicate “minor maintenance due” with a yellow flashing L.E.D and a message on the L.C.D. stating “minor maintenance due”.
(1) Visual Inspection must be preformed before minor and major maintenance.
(a) Inspect all water and steam installations for possible leakage or damage. (b) Inspect electrical installation for lose or frayed cables, as well as damaged
components. (c) Inspect the condition of the unit’s cabinetry for damage. (d) Survey the area surrounding the humidifier make sure all clearances are met.
(2) Maintenance
(a) Manually drain the NHRS by pressing the drain button on the display. (b) Turn the units power to the off position. (c) Switch the external electrical disconnect to the off position.
WARNING THE NHRS HUMIDIFIER MAIN FUNCTION INVOLVES BRINGING WATER UP TO BOILING TEMERATURES. DO NOT LOSE SIGHT OF THE FACT THAT THE UNITS STEAM CYLINDER AND PLUMBING COMPONENTS MAY BE HOT!!!. ALLOW THE UNIT AN APPROPRIATE AMOUNT OF TIME TO COOL BEFORE PREFORMING SERVICE.
WARNING HIGH VOLTAGE!! DISCONNECT MAIN POWER BEFORE SERVICING THE UNIT.
(d) Remove the screw that holds the front door on the cabinetry in place. (e) Remove the Front Panel by sliding the panel upward then away from the unit.
10-30 Page 3 2008-02-02
(f) Confirm that the high voltage feed to the unit is off then remove the high voltage wires that connect to the top of the steam cylinder.
NOTE
The heating elements will not be affected if they are connected to different power lines when reinstalled.
(g) Using a slotted screwdriver loosen the gear clamps that hold the steam line in
place. (h) Remove the steam line. (i) Remove the Zip Tie cylinder restraint. (j) Lift the cylinder upward then out of the front of the unit.
CAUTION BE EXTREMELY CAREFULL WHEN HANDLING THE STEAM CYLINDER. IF IT IS DROPPED AND DAMAGED THERE IS A GOOD CHANGE IT WILL NOT SEAL PROPERLY AND THE ENTIRE CYLINDER WILL NEED TO BE REPLACED.
(k) Remove the clamp at the top of the cylinder. (l) Remove the tank lid with elements attached. (m) Remove all scale from the tank. (n) Inspect the heating elements for damage. (o) Re-install the equipment in the reverse order. (p) Turn power and water supplies back on to the unit. (q) Turn on the unit and carryout the steps of the visual inspection once more.
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Figure 1. Minor Maintenance with Scale Management Option
10-30 Page 5 2008-02-02
B. MAJOR MAINTENANCE (1) Manually drain the unit, then turn the unit main power switch to the off position. (2) Switch the external electrical disconnect to the off position.
WARNING THE NHRS HUMIDIFIER MAIN FUNCTION INVOLVES BRINGING WATER UP TO BOILING TEMERATURES. DO NOT LOSE SIGHT OF THE FACT THAT THE UNITS STEAM CYLINDER AND PLUMBING COMPONENTS MAY BE HOT!!!. ALLOW THE UNIT AN APPROPRIATE AMOUNT OF TIME TO COOL BEFORE PREFORMING SERVICE
WARNING HIGH VOLTAGE!! DISCONNECT MAIN POWER BEFORE SERVICING THE UNIT.
(3) Remove the screw that holds the front door on the cabinetry in place. (4) Remove the Front Panel by sliding the panel upward then away from the unit. (5) Confirm that the high voltage feed to the unit is off then remove the high voltage
wires that connect to the top of the steam cylinder.
NOTE The heating elements will not be affected if they are connected to different power lines from the electrical department.
(6) Using a slotted screwdriver loosen the gear clamps that hold the steam line in place. (7) Remove the steam line. (8) Remove the Zip Tie cylinder restraint. (9) Lift the cylinder upward then out of the front of the unit.
CAUTION BE EXTREMELY CAREFULL WHEN HANDLING THE STEAM CYLINDER. IF IT IS DROPPED AND DAMAGED THERE IS A GOOD CHANGE IT WILL NOT SEAL PROPERLY AND THE ENTIRE CYLINDER WILL NEED TO BE REPLACED.
(10) Remove the clamp at the top of the cylinder. (11) Remove the tank lid with elements attached. (12) Remove all scale from the tank. (13) Inspect the heating elements for damage and remove scale build up. (14) Re-install the equipment in the reverse order. (15) Turn power and water supplies back on to the unit. (16) Turn on the unit and carryout the steps of the visual inspection once more.
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10-40 Page 1 2008-02-02
10-40 TROUBLESHOOTING
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1. TROUBLE-SHOOTING
NOTE Most operational malfunctions are not caused by faulty equipment but rather by improper installation or disregard for planning guidelines. Therefore, a complete fault diagnosis always involves a thorough examination of the entire system. Often, the steam hose connection has not been properly executed or the fault lies with the humidity control system. The following table gives a list of possible malfunctions, the appropriate alarm or error message, details of their cause, and notes on how to deal with each problem.
Table 1. Troubleshooting
Malfunction / Indication Cause Remedy
Min. Filling time too short Error code: 1A/1B
Alarm1A
fillingtime
Error1B Fillingtime
Steam cylinder heavily calcified. Level in steam cylinder and level in the float chamber do not match.
Carry out major servicing.
Internal safety chain interrupted Error code: 2A/2B
Alarm2A
Safetychainint Error2 safetychainint
Connection to over-temperature switch on steam cylinder is broken or over-temperature switch faulty. Steam cylinder overheating, over-temperature switch has responded. Flat-band cable between control and power board interrupted or not connected.
Check connections or replace over-temperature switch. Inspect steam cylinder, clean if necessary. Replace over-temperature switch. Inspect connections, connect or replace flatband cable.
Max. Filling time exceeded (alarm message only) Error code: 3A/3B
Alarm3A
Water supply
Water feed blocked (main water tap closed, filter valve closed or blocked). Water pressure too low. Inlet valve does not open, filter sieve in Inlet valve blocked or inlet valve faulty. Feed hoses into the steam humidifier not connected or kinked. Level unit not connected. Float in the level unit sticking or level unit faulty.
Check water feed, open main water tap, open or clean filter valve. Raise water pressure (range 1-10 bar). Inspect electrical connections and fuse F2 on supply module. Clean filter sieve or replace Inlet valve. Inspect hoses into unit and connect if necessary. Replace faulty hoses. Connect level unit. Clean or replace level unit.
10-40 Page 3 2008-02-02
Max. Boil down rate too long Error code: 4A/4B
Error4B
SteamtimeAlarm 4Asteamtime
Individual heating elements faulty. Main voltage too low or failure of a phase (L1, L2 or L3). Steam line too long or not insulated.
Replace faulty heating elements. Replace fuses on power board. Check main voltage and connections. Maintain maximum line lengths (max. 15’). Insulate steam lines.
Max. Drain time exceeded Error code: 5A/5B
Alarm5Adrain Error5Bdrain
Drain pump not connected or faulty. Outlet line from unit kinked or blocked. Water outlet blocked (external outlet line or siphon blocked. Hose to level unit blocked.
Connect or replace drain pump. Inspect outlet line from unit, replace if necessary. Clean water outlet line and siphon. Clean or replace hose.
Invalid level Error code: 6A/6B
Alarm6A
Levelindicat Error6B
levelindicat
Level unit faulty. Magnetic field in vicinity of level unit.
Replace level unit. Eliminate magnetic field.
Steam pressure (error only) Error code: 7A/7B
Alarm7A
communication
Steam hose blocked or restricted (water trap). Pressure balance adapter into steam connection fitting blocked. Duct pressure too high (>1500 Pa).
Inspect steam hose, clean if necessary and install correctly. Remove adapter and clean opening with a needle. Inspect ventilation settings.
External safety chain interrupted Error code: none
SafetychainexternalA
Mainsfailure B
Ventilator lock open. Automatic flow control has responded. Safeties are open. Main failure on Unit B.
Switch on ventilator/ventilation system. Inspect ventilator/filter of ventilation system. Servicing, inspect system if necessary. Inspect voltage supply to Unit B.
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Wiring
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10-40 Page 5 2008-02-02
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Figure 2. Wiring Diagram
10-40 Page 6
2008-02-01
2. START-UP CHECK LISTS NHRS Electric Steam Humidifier Humidifier Mandatory Pre-Start-up Checklist (p.1 of 3) Unit Serial #: ____________ # of humidifiers: ____________ Tag:_____________ Unit type: NHRS Voltage: _____V/___ph Steam output: ____lbs./hr Customer/Job:_______________ Address: ____________________________________________________________________ Inspected by: ____________ Date of inspection: ___/___/___ WATER QUALITY:
Well water City water Softened water Conductivity: _______mhmos Hardness: _____gr. Silica____ppm
HUMIDIFIER MOUNTING:
Clearances around the unit: Acceptable Obstruction Front (door opens freely?) 3ft min __________________
Top (steam lines) 1ft min ____________________
Bottom (fill, drain, controls) 1ft min ____________________
Right (main pwr) 3ft min ____________________
Left (main pwr) 2” min ____________________
Ensure the scale tank bracket is locked in place
STEAM LINES: CONDENSATE LINES: Slope up 2” per 12” Slopped back to drain
Slope down ½” per 12” Trapped 2” more than static duct pressure
Traps Size _______
Insulated Length/Size ____________
90º elbows qty: ____ 45 deg. Elbows qty: ____
Can condensate be trapped anywhere in the steam line? Yes no WATER LINES: ½” at max 4ft from the unit -3/8” connection at fill
Water pressure: 30-80psig
10-40 Page 7 2008-02-02
Humidifier Mandatory Pre-Start-up Checklist (p.2 of 3) DRAIN LINES: Air gap located within 3ft of the unit Slopped to drain Size:______________
WIRING: No loose wires around the unit or on the PC board? Yes no CONTROLS:
Installed Location/Wiring/Setting
High limit: _________________
Air proving: _________________ Mod controller: _________________ Other: _________________ POWER: Voltage, amperage rating and fuse corresponds to Spec Label
Disconnect switch located close to humidifier
Field contact:___________________________ Signature:_______________________________
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2008-02-01
Humidifier Mandatory Start-up Checklist (p. 3 of 3)
Unit Serial #: ____________ # of humidifiers: ____________ Tag:_____________ Unit type: NHRS Voltage: _____V/___ph Steam output: ____lbs./hr Customer/Job:___________ Address: ___________________________________________ Start-up by: _____________ Date of Start-up: ___/___/___ PRELIMINARY: Pre-start-up checklist completed? Yes No If no, return to Pre-Start-up Checklist before going on with start-up procedure.
START-UP PROCEDURE: The prerequisites for getting power and water into the steam cylinder is as follows:
1. Check that main breaker is on and power is at the unit. 2. Check that main water shut-off valve is open. 3. on/off/drain switch must be switched on. 4. Control circuit 1 - 2 must be made. 5. Modulation humidistat, if present, must be calling. 6. Door interlock switch must be made (interlock switch can be pulled out to operate unit).
NOTE: The unit will undergo a System Test to ensure integrity of all the components. If the test is successful, the unit will fill and the float test will be carried out. If everything ok, the green light will come on and the display will show NHRS Ready. OPERATIONAL CHECK: 1. Switch on the humidification by raising the humidity set point on the humidistat/controller. 2. Switch off the humidification by lowering the humidity set point on the humidistat/controller. 3. Check for correct functioning of the external monitoring safeties such as air proving and high limit. 4. When check complete: Set the desired humidity level. REMARKS: ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________
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3. MAINTENANCE CHECK LISTS
Maintenance Checklist (p.1 of 1)
Unit Serial #: ____________ # of humidifiers: ____________ Tag:_____________ Unit type: NHRS Voltage: _____V/___ph Steam output: ____lbs./hr Customer/Job:___________ Address: ___________________________________________ Maintenance by: _____________ Date of Maintenance: ___/___/___
TYPE OF MAINTENANCE: Periodic maintenance, once per week:
1. Inspect water and steam installation lines for leaks 2. Inspect drain lines for clogging 3. Inspect electrical installation for loose cables and damaged components. 4. Inspect the humidifier for damage.
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Figure 1. Exploded View - Plumbing
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Table 1. Exploded View - Plumbing
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Figure 2. Exploded View - Electrical
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Table 2. Exploded View - Electrical
WARRANTY(1) WALTER MEIER INC. and/or WALTER MEIER LTD. (hereinafter collectively referred
to as THE COMPANY), warrant for a period of two years after installation or 30 months from manufacturer’s ship date, whichever date is earlier, that THE COMPANY’s manufactured and assembled products, not otherwise expressly warranted (with the exception of the cylinder), are free from defects in material and workmanship. No warranty is made against corrosion, deterioration, or suitability of substituted materials used as a result of compliance with government regulations.
(2) THE COMPANY’s obligations and liabilities under this warranty are limited to furnishing replacement parts to the customer, F.O.B. THE COMPANY’s factory, providing the defective part(s) is returned freight prepaid by the customer. Parts used for repairs are warranted for the balance of the term of the warranty on the original humidifier or 90 days, whichever is longer.
(3) The warranties set forth herein are in lieu of all other warranties expressed or implied by law. No liability whatsoever shall be attached to THE COMPANY until said products have been paid for in full and then said liability shall be limited to the original purchase price for the product. Any further warranty must be in writing, signed by an officer of THE COMPANY.
(4) THE COMPANY’s limited warranty on accessories, not of the companies manufacture, such as controls, humidistats, pumps, etc. is limited to the warranty of the original equipment manufacturer from date of original shipment of humidifier.
(5) THE COMPANY makes no warranty and assumes no liability unless the equipment is installed in strict accordance with a copy of the catalog and installation manual in effect at the date of purchase and by a contractor approved by THE COMPANY to install such equipment.
(6) THE COMPANY makes no warranty and assumes no liability whatsoever for consequential damage or damage resulting directly from misapplication, incorrect sizing or lack of proper maintenance of the equipment.
(7) THE COMPANY retains the right to change the design, specification and performance criteria of its products without notice or obligation.
Cylinder Replacement Date (MM/DD/YYYY)
INSTALLATION DATE (MM/DD/YYYY)
MODEL #
SERIAL #
CYLINDER #
U.S.A.Walter Meier (Climate USA) Inc.826 Proctor AvenueOgdensburg, NY 13669TEL: 1-866-NORTEC-1EMAIL: [email protected]: www.humidity.com
CANADAWalter Meier (Climate Canada) Ltd.2740 Fenton RoadOttawa, ON K1T 3T7TEL: 1-866-NORTEC-1FAX: (613) 822-7964
Authorized Agent: