Nortec NHRS Series Humidifier Owners Manual

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Nortec NHRS Series Humidifier Owners Manual
NHRS
Series
TM
RESISTIVE ELEMENT
STEAM HUMIDIFIER
Installation Manual
Manual No. H-103
2008-02-11
253-0618
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 references to the NORTEC name should be
taken as referring to WALTER MEIER LTD.
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.
COPYRIGHT NOTICE
Copyright 2008, WALTER MEIER LTD. All rights reserved.
RECORD OF REVISIONS
For each revision, put the revised pages in your manual and discard the superseded pages. Write 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
2008-02-11
Revision
Date
Date Put
In Manual
By
Revision
Number
Revision
Date
Date Put
In Manual
By
TABLE OF CONTENTS
Subject
Page
10-00 INTRODUCTION
1.
A.
2.
A.
B.
C.
3.
A.
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
RECEIVING & UNPACKING EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PACKAGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
HUMIDIFIER AND CONTROL BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DISTRIBUTOR BOX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PRE-INSTALLATION EQUIPMENT VERIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
10-10 INSTALLATION PROCEDURES
1.
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
L.
2.
A.
B.
C.
D.
E.
F.
G.
H.
3.
A.
B.
C.
D.
4.
A.
B.
HUMIDIFIER INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
MOUNTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
WATER SUPPLY LINE - POTABLE WATER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
WATER SUPPLY LINE - DE-IONIZED WATER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
WATER DRAIN LINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
STEAM LINES AND CONDENSATE RETURNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
ELECTRICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
CONTROL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DEMAND SIGNAL CONTROLS INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
HUMIDITY TRANSDUCER SIGNAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
OPTIONAL OUTDOOR TEMPERATURE RESET FUNCTION . . . . . . . . . . . . . . . . . . . . . . . 14
HUMIDITY TRANSDUCER SIGNAL INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
STEAM DISTRIBUTOR INSTALLATION FOR THE ASD, BSD, CSD . . . . . . . . . . . . . . . . . . . . . 16
STEAM DISTRIBUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
DISTRIBUTOR CHARACTERISTICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
DISTRIBUTOR LOCATIONS AND MOUNTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
MULTIPLE DISTRIBUTOR APPLICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
LOCATION OF STEAM DISTRIBUTORS WITHIN AN AIR HANDLER . . . . . . . . . . . . . . . . . 20
DISTRIBUTOR ABSORPTION DISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
TYPICAL APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
DISTRIBUTORS DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SAM-E SHORT ABSORPTION MANIFOLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
IN-DUCT INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
OUTSIDE DUCT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
VERTICAL IN-DUCT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
DRAIN WATER COOLING OPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
BLOWER PACKS (BOBP, RMBP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
BLOWER PACKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
PRIMARY VOLTAGE CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10-00
Page vii
2006-08-01
Subject
Page
10-20 OPERATION
1.
A.
B.
C.
D.
2.
A.
B.
C.
D.
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LAYOUT AND FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STEAM GENERATION REGULATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FLUSHING NHRS WITH SCALE MANAGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NHRS OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
STARTING OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SYSTEM START-UP TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INITIAL START-UP PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DISPLAY MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
2
2
3
3
3
3
4
5
7
10-30 MAINTENANCE PROCEDURES
1.
A.
B.
NHRS MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
MINOR MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
MAJOR MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
10-40 TROUBLESHOOTING
1.
2.
3.
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
START-UP CHECK LISTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
MAINTENANCE CHECK LISTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
10-50 TECHNICAL
1.
2.
EXPLODED VIEWS - PLUMBING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
EXPLODED VIEWS ELECTRICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
WARRANTY
10-00
Page viii
2006-08-01
LIST OF FIGURES
Figure
Page
10-00 INTRODUCTION
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
NHRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Humidifier Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Distributor Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SAM-e Distributor Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Remote Mounted Blower Pack Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Typical NHRS Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical NHRS Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
10-10 INSTALLATION PROCEDURES
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Plumbing Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Steam Run and Condensate Return Installation Guidelines . . . . . . . . . . . . . . . . . 7
Steam Run and Condensate Return Installation Guidelines . . . . . . . . . . . . . . . . . 8
Primary Voltage Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
On/Off Guidelines and Low Voltage Terminal Strip. . . . . . . . . . . . . . . . . . . . . . . 12
NORTEC Control Guidelines and Wiring (Optional) . . . . . . . . . . . . . . . . . . . . . . 13
Setpoint vs. Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Nortec Humidity Transducer Guidelines and Wiring (Option) . . . . . . . . . . . . . . . 15
Leveling the Distributor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Single Steam Distributor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Multiple Steam Distributor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Cutting Duct for Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Best Location for Multiple Steam Distributors . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Roof Top Units 2-20 Tons - Typical Location . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Small Unit on Residential Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
SAM-e Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Steam Tube Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Top Steam Tube Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Adjustable Mounting Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Typical SAM-e Duct Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Outside Duct Mounting Cover Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Vertical Duct Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Drain Water Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
NHRS with Remote Pack Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10-20 OPERATION
Figure 1.
Figure 2.
Figure 3.
NHRS Maintenance Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Drain Interval Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Control Signal Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
10-00
Page ix
2006-08-01
10-30 MAINTENANCE PROCEDURES
Figure 1.
Minor Maintenance with Scale Management Option. . . . . . . . . . . . . . . . . . . . . . . 4
10-40 TROUBLESHOOTING
Figure 1.
Figure 2.
Wiring Diagram - NHRS 010-090 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Wiring Diagram - NHRS 135-180 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
10-50 TECHNICAL
Figure 1.
Figure 2.
10-00
Page x
2006-08-01
Plumbing Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Electrical Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
LIST OF TABLES
Table
Page
10-10 INSTALLATION PROCEDURES
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Maximum Recommended Length of Steam Line . . . . . . . . . . . . . . . . . . . . . . . . . 6
Steam Line Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Recommended Materials and Sizes for Steam Runs . . . . . . . . . . . . . . . . . . . . . . 6
Recommended Condensate Line at Distributor(s) . . . . . . . . . . . . . . . . . . . . . . . . 9
Equivalent Lengths of Elbows and tee Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Humidifier and Distributor Inlet/Outlet Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Ceiling and Frontal Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10-20 OPERATION
Table 1.
Table 2.
Table 3.
NHRS Operational Status LED’s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Remote Fault Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Water Quality. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
10-40 TROUBLESHOOTING
Table 1.
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
10-50 TECHNICAL
Table 1.
Table 2.
Plumbing Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Electrical Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
10-00
Page xi
2006-08-01
10-00
INTRODUCTION
10-00
Page 1
2008-02-11
Figure 1. NHRS
10-00
Page 2
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 3
2008-02-11
BAG WITH
MANUAL,
CLAMPS,
HOSE SECTION
CONTROLS
(IF ORDERED
ONLY)
HUMIDIFIER
STEAM HOSE
SECTION (NOT
SUPPLIED IF BUILT
ON BLOWER PACK
ORDERED)
H096
BOX WITH
ABBREVIATED
INSTRUCTIONS
AND BOX
CONTENT
STICKERS
Figure 2. Humidifier Box
Figure 3. Distributor Box
Figure 4. SAM-e Distributor Box
Figure 5. Remote Mounted Blower Pack Box
10-00
Page 4
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 5
2008-02-11
MOUNT DISTRIBUTORS LEVEL
ATMOSPHERIC STEAM INLET
USE NORTEC SUPPLIED STEAM
HOSE AND GEAR CLAMPS
TRAP CONDENSATE
BEFORE DISTRIBUTOR
AT END OF ANY DOWNSLOPE
MOUNT LEVEL
12.000 IN.
TO TOP
OF TRAP
0.313 IN. UNC
TO DRAIN
STEAM LINES AND CONDENSATE RETURNS
CH. 10-10 P. 6-7
MAIN RULES FOR ATMOSPHERIC STEAM LINES
1- SLOPE THE STEAM LINES
2- TRAP CONDENSATE
3- INSULATE WITH 1 IN. PIPE INSULATION
4- FOLLOW RECOMMENDED MATERIALS, SIZE AND LENGTH
SHORT ABSORPTION MANIFOLD
CH. 10-10 P. 23-29
SLOPING STEAM LINES
12.000 IN.
2.000 IN.
N
ECTIO
M DIR
ST EA
10 DEGREES
SLOPE UP WITH STEAM
0.500 IN.
2 DEGREES
STEAM DIR
ECTION
INSULATE WITH
1.000 IN. PIPE INSULATION
12.000 IN.
SLOPE DOWN WITH STEAM
METHOD FOR TRAPPING CONDENSATE
OR
‘P’ TRAP MUST BE
6.000 IN. OR GREATER
THE TEE TRAP IS
A FULL SIZED ‘T’
FITTING
TO TRAP
AND DRAIN
ATMOSPHERIC
STEAM INLET
USE NORTEC
SUPPLIED STEAM
HOSE AND
GEAR CLAMPS
12.000 IN. MIN
6.000 IN. MIN
12.000 IN.
TO TOP
OF TRAP
AIR
GAP
TO DRAIN
H118-1
THERE MUST BE
A 12.000 IN. DROP
TO THE CENTER
OF THE ‘P’ TRAP
Figure 6. Typical NHRS Installation (Sheet 1 of 2)
10-00
Page 6
2008-02-11
BLOWER PACKS CH. 10-10
WIRE TERMINALS 82-83 ON BLOWER PACK IN SERIES WITH
ON/OFF LOOP ON THE HUMIDIFIER (TERMINAL 1-2)
CLEARANCES
FRONT AND
Minimum
36.000 IN.
BOTTOM
CLEARANCE
CONTROLS CH. 10-10
3
_
4
5
6
7
5VDC
2
CONTROL (-)
1
SAFETY ON/OFF LOOP
INTERNAL
24VAC
EXTERNAL
MODULATION
TERMINALS
{
ON/OFF
TERMINALS
CONTROL SIGNAL(+)
12.000 IN.
BEFORE
ANY BEND
Minimum
24.000 IN.
Minimum
36.000 IN.
_
NHRS TERMINAL
ELECTRICAL
CH. 10-10
GROUND WIRE
DEDICATED
CIRCUIT
BREAKER
OR
DISCONNECT
L2
-
GROUND
LEG
GROUND
L1
2 POLE
TERMINAL
BLOCK
E I
SINGLE PHASE UNIT.
X N
SINGLE PHASE SUPPLY.
T T
REQUIRED VOLTAGE BETWEEN L1 AND L2.
LOAD BALANCED.
ON
GROUND WIRE
OFF
GROUND
L1
DEDICATED
CIRCUIT
BREAKER
OR
DISCONNECT
L2
L3
GROUND
LEG
3 POLE
TERMINAL
BLOCK
- 3 PHASE UNIT.
- 3 PHASE SUPPLY.
- LOAD WILL BE BALANCED.
- REQUIRED VOLTAGE BETWEEN ANY
Figure 7. Typical NHRS Installation (Sheet 2 of 2)
10-00
Page 7
2008-02-11
E I
X N
T T
TWO LEGS.
H118-2
NEUTRAL
THIS PAGE INTENTIONALLY LEFT BLANK
10-00
Page 8
2008-02-11
10-10
INSTALLATION
PROCEDURES
10-10
Page 1
2008-02-02
1. HUMIDIFIER INSTALLATION
A.
B.
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.
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.
10-10
Page 2
2008-02-01
C.
D.
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.
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.
10-10
Page 3
2008-02-02
CAUTION
PLUMBING
ALL WORK SHOULD BE DONE
ACCORDING TO LOCAL PLUMBING
CODE. DRAIN WATER CAN BE VERY
HOT DO NOT DRAIN INTO A PUBLIC
SINK
ALL PLUMBING IS TO BE
PREFORMED BY A LICENCES
PLUMBER
SUPPLY
DRAIN COOLING
POTABLE WATER**
RO, DI OR
POTABLE WATER**
1.5 in. OD. ON THREADED OUTLET WITH
FACTORY SUPPLIED HOSE AND CLAMP
AIR GAP REQUIRED.
A MIN. 2.0 in. TO 0.875 in. COPPER REDUCER
IS IDEAL FOR THIS APPLICATION.
NORTEC P/N 252-2172
0.500 in NPT
USE UNION TO
CONNECT PIPE
TO UNIT
SUPPLY PRESURE 30-80 PSIG
SUPPLY PRESURE 30-80 PSIG
ALWAYS INSTALL A
WATER SHUT OFF
VALVE
0.875 in OD MIN. DRAIN LINE
KEEP AS SORT AS POSSIBLE
ALWAYS SLOPE DOWNWARD
PIPE AND WATER SHUT-OFF VALVE NOT SUPPLIED BY NORTEC
FEED RO OR DI WATER ONLY TO SUPPLY.
DRAIN WATER COOLER SHOULD USE POTABLE WATER.
ENSURE ALL RO AND DI SUPPLY PIPING AND HARDWARE
ARE OF SUITABLE MATERIAL. E.g. PLASTIC OR STAINLESS
FOR BOTH INLETS.
Figure 1. Plumbing Connections
10-10
Page 4
2008-02-01
E.
F.
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.
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.
10-10
Page 5
2008-02-02
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)
yes
no
yes
yes
Short Run < 10 feet (3m)
Long Run > 10 feet (3m)
Stainless Steel Tube
(RO or DI)
yes
yes
Table 3. Recommended Materials and Sizes for Steam Runs
Unit Size
Steam Run
Steam Line Material
Steam Line Description
lbs/hr
kg/hr
ft
m
0-30
0-13
0-10
0-3
Copper Tube
0-30
0-13
10-30
3+
Copper Tube
0-30
0-13
0-10
0-3
Stainless Steel Tube
1.750 inch Tube x
0.065 inch thick
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)
50-100
22-45
20+
6+
Copper Tube
2.0 inch MED-L Tubing
(2.125 inch OD)
50-100
22-45
0-20
0-6
Stainless Steel Tube
1.750 inch Tube x
0.065 inch thick
50-100
22-45
20+
6+
Stainless Steel Tube
2 inch Tube x
0.065 inch thick
Potable
RO or DI
Potable
RO or DI
1.500 in MED-L Tubing
(1.625 inch OD)
2.0 inch MED-L Tubing
(2.125 inch OD)
10-10
Page 6
2008-02-01
Figure 2. Steam Run and Condensate Return Installation Guidelines (1 of 2)
10-10
Page 7
2008-02-02
Figure 3. Steam Run and Condensate Return Installation Guidelines (2 of 2)
10-10
Page 8
2008-02-01
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
1.5 inch
3 inch
4 inch
2 feet
3.5 feet
5 feet
8 feet
1 foot
1.75 feet
2.5 feet
4 feet
4 feet
7 feet
11 feet
15 feet
Table 6. Humidifier and Distributor Inlet/Outlet Sizes
Humidifier
Steam Outlet
Distributor
Steam Inlet
NHRS 010-090
NHRS 135-180
1.500 inch
2 x 1.500 inch
ASD, BSD
CSD
0.875 inch OD
1.75 inch OD
0.875 inch OD or
1.75 inch OD
1.75 inch OD
0.875 or 1.75 inch OD
Blower Pack
SAM-e
Mini SAM-e
10-10
Page 9
2008-02-02
G.
ELECTRICAL
(1)
H.
CONTROL WIRING
(1)
I.
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.
DEMAND SIGNAL CONTROLS INSTALLATION
(1)
J.
Local electrical codes should always be followed when installing a NORTEC
Humidifier. Direct wiring to the high voltage terminal is shown in Figure 5.
Figure 6 uses the NORTEC optional controller to demonstrate the typical
demand signal installation.
HUMIDITY TRANSDUCER SIGNAL INSTALLATION
(1)
Figure 8 displays NORTEC optional humidity transducer installation.
10-10
Page 10
2008-02-01
PRIMARY (LINE) VOLTAGE WIRING TO UNIT
(BY OTHERS)
WIRING TO BE PERFORMED BY
A LICENSED ELECTRICIAN.
GROUND WIRE
DEDICATED
CIRCUIT
BREAKER
OR FUSED
DISCONNECT
L2
-
GROUND
LEG
2 POLE
TERMINAL
BLOCK
GROUND
L1
E I
SINGLE PHASE UNIT.
X N
SINGLE PHASE SUPPLY.
T T
REQUIRED VOLTAGE BETWEEN L1 AND L2.
LOAD BALANCED.
GROUND WIRE
GROUND
LEG
2 POLE
TERMINAL
BLOCK
GROUND
L1
DEDICATED
CIRCUIT
BREAKER
OR FUSED
DISCONNECT
L2
L3
E I
- SINGLE PHASE UNIT.
X N
- 3 PHASE SUPPLY.
T T
- LOAD WILL BE UNBALANCED.
- REQUIRED VOLTAGE BETWEEN L1 AND L2.
NEUTRAL
OPTIONAL INTERNAL FUSES ARE
NOT INTENDED TO SUBSTITUTE FOR
EXTERNAL FUSES. THIS OPTION
IS STRICTLY TO PROVIDE
PROTECTION FOR THE INTERNAL
WIRES INDIVIDUALLY.
A DEDICATED EXTERNAL FUSED
DISCONNECT MUST BE
INSTALLED. DO NOT EXCEED
THE MAXIMUM CIRCUIT
PROTECTION AMPS AS
INDICATED ON THE
SPECIFICATION LABEL.
GROUND WIRE
L3
OFF
3 POLE
TERMINAL
BLOCK
DEDICATED
CIRCUIT
BREAKER
OR FUSED
DISCONNECT
L2
ON
GROUND
LEG
GROUND
L1
NEUTRAL
- 3 PHASE UNIT.
- 3 PHASE SUPPLY.
- LOAD WILL BE BALANCED.
- REQUIRED VOLTAGE BETWEEN ANY
E I
X N
T T
TWO LEGS.
ENSURE THAT ADEQUATE POWER SUPPLY IS
AVAILABLE TO CARRY FULL HUMIDIFIER
AMPERAGE DRAWN AS SPECIFIED BY SPECIFICATION LABEL.
H072
NOTE: VOLTAGE AT TERMINAL BLOCK MUST BE IN ACCORDANCE WITH SPECIFICATION LABEL
ALL WIRING TO BE IN ACCORDANCE WITH EXISTING NATIONAL AND LOCAL ELECTRICAL CODES.
Figure 4. Primary Voltage Supply
10-10
Page 11
2008-02-02
Figure 5. On/Off Guidelines and Low Voltage Terminal Strip
10-10
Page 12
2008-02-01
Figure 6. NORTEC Control Guidelines and Wiring (Optional)
10-10
Page 13
2008-02-02
K.
OPTIONAL OUTDOOR TEMPERATURE RESET FUNCTION
NOTE
Order Outdoor Temperature sensor separately, Part Number #252-0263
L.
(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.
HUMIDITY TRANSDUCER SIGNAL INSTALLATION
(1)
Figure 8 displays NORTEC optional humidity transducer installation.
Figure 7. Setpoint vs. Outdoor Temperature
10-10
Page 14
2008-02-01
Figure 8. NORTEC Humidity Transducer Guidelines and Wiring (Option)
10-10
Page 15
2008-02-02
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).
10-10
Page 16
2008-02-01
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.)
10-10
Page 17
2008-02-02
Figure 9. Leveling the Distributor
Figure 10. Single Steam Distributor
Figure 11. Multiple Steam Distributor
10-10
Page 18
2008-02-01
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)
10-10
Page 19
2008-02-02
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.
10-10
Page 20
2008-02-01
Figure 13. Best Location for Multiple
Steam Distributors
Figure 15. Small Unit on Residential
Furnace
10-10
Page 21
2008-02-02
Figure 14. Roof Top Units 2-20 Tons –
Typical Location
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 headermounting 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.
10-10
Page 22
2008-02-01
(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.
10-10
Page 23
2008-02-02
Figure 16. SAM-e Tubes
Figure 18. Top Steam Tube Bracket
Figure 17. Steam Tube Offset
Figure 19. Adjustable Mounting Frame
10-10
Page 24
2008-02-01
Figure 20. Typical SAM-e Duct Installation
10-10
Page 25
2008-02-02
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
10-10
Page 26
2008-02-01
(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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2008-02-02
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.
10-10
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2008-02-01
Figure 23. SAM-e Drain Water Cooling
10-10
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2008-02-02
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.
10-10
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2008-02-01
Figure 24. NHRS with remote Blower Pack Option
Table 7. Ceiling and Frontal Clearances
NHRS Series Model
010
015
020
030
045
065
090
135
180
NOTES:
Minimum Number of
Blower Packs
1
1
1
1
1
1
1
2
2
Minimum Ceiling
Clearance
18 (45)
18 (45)
18 (45)
18 (45)
36 (91)
42 (106)
48 (122)
42 (106)
48 (122)
Minimum Frontal
Clearance
30 (76)
30 (76)
36 (91)
72 (183)
84 (213)
144 (366)
156 (396)
144 (366)
156 (396)
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.
10-10
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2008-02-02
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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2008-02-01
10-20
OPERATION
10-20
Page 1
2008-02-02
1. OPERATION
A.
B.
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.
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.
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2008-02-01
C.
STEAM GENERATION REGULATION
(1)
D.
The steam is produced in the steam tank by resistive heating element
technology. Steam production is fully variable from 3 to 100%.
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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2008-02-02
(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.
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2008-02-01
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)
L.E.D
Green
Yellow
Red
Red
The operating status is displayed in the LED on the unit as follows
Table 1. NHRS Operational Status LED’s
ACTION
MEANING
Constant
Unit Producing Steam
Flashing
Major or Minor Service Due.
Flashing
The Unit is trying to self-correct a problem.
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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2008-02-02
(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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2008-02-01
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 <Ð>or<Ï>.
(b) <Ð> next operating parameter.
(c) <Ï> 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 <Ð> and <Ï>, 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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2008-02-02
(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.
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2008-02-01
Value Setting
Position
S2
0
1
2
3
4
5
6
7
8
9
Interval Minor
Maintenance
200 hours
300 hours
300 hours
450 hours
400 hours
600 hours
500 hours
750 hours
3000 hours
6000 hours
Interval Major
Maintenance
600 hours
600 hours
900 hours
900 hours
1200 hours
1200 hours
1500 hours
1500 hours
3000 hours
6000 hours
Factory Setting
NHRS
Model
10
15
20
30
45
6
90
135
180
S2 Setting
0
0
0
0
0
0
0
0
0
NHRS Main PCB
Maintenance Interval
Adjustment [S2]
Figure 1. NHRS Maintenance Intervals
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2008-02-02
(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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2008-02-01
Figure 2. Drain Interval Settings
10-20
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2008-02-02
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
> 50 ppm
> 25 ppm
Chlorides
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.
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2008-02-01
(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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2008-02-02
Figure 3. Control Signal Setting
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2008-02-01
(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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10-20
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2008-02-01
10-30
MAINTENANCE
PROCEDURES
10-30
Page 1
2008-02-02
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
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2008-02-01
(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.
10-30
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2008-02-02
Figure 1. Minor Maintenance with Scale Management Option
10-30
Page 4
2008-02-01
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)
(7)
(8)
(9)
Using a slotted screwdriver loosen the gear clamps that hold the steam line in
place.
Remove the steam line.
Remove the Zip Tie cylinder restraint.
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)
(11)
(12)
(13)
(14)
(15)
(16)
10-30
Page 5
2008-02-02
Remove the clamp at the top of the cylinder.
Remove the tank lid with elements attached.
Remove all scale from the tank.
Inspect the heating elements for damage and remove scale build up.
Re-install the equipment in the reverse order.
Turn power and water supplies back on to the unit.
Turn on the unit and carryout the steps of the visual inspection once more.
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10-30
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10-40
TROUBLESHOOTING
10-40
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2008-02-02
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
Steam cylinder heavily calcified.
Level in steam cylinder and level
in the float chamber do not match.
Carry out major servicing.
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 overtemperature switch. Inspect
connections, connect or replace
flatband cable.
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.
Alarm1A
fillingtime
Error1B
Fillingtime
Internal safety chain
interrupted Error code: 2A/2B
Alarm2A
Safetychainint Error2
safetychainint
Max. Filling time exceeded
(alarm message only) Error
code: 3A/3B
Alarm3A
Water supply
10-40
Page 2
2008-02-01
Max. Boil down rate too long
Error code: 4A/4B
Error4B
SteamtimeAlarm
4Asteamtime
Max. Drain time exceeded
Error code: 5A/5B
Alarm5Adrain
Error5Bdrain
Invalid level
Error code: 6A/6B
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.
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.
Level unit faulty.
Magnetic field in vicinity of level
unit.
Connect or replace drain pump.
Inspect outlet line from unit,
replace if necessary. Clean water
outlet line and siphon. Clean or
replace hose.
Replace level unit.
Eliminate magnetic field.
Alarm6A
Levelindicat
Error6B
levelindicat
Steam pressure (error only)
Error code: 7A/7B
Alarm7A
communication
External safety chain
interrupted Error code: none
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.
Ventilator lock open. Automatic
flow control has responded.
Safeties are open.
Switch on ventilator/ventilation
system. Inspect ventilator/filter of
ventilation system. Servicing,
inspect system if necessary.
Main failure on Unit B.
Inspect voltage supply to Unit B.
SafetychainexternalA
Mainsfailure B
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2008-02-02
MENU
R
FILL 1
FILL 2
FILL 3
(D.W.C.)
X 14
X5,1
M
X13,1
3 2 1
6 54
O
BLOWER
PACK
TERMINAL
BLOCK
C1
CONTACTOR 1
N0
DOOR
INTERLOCK
C
24 VAC
DRAIN PUMP
SPLITTING TERMINAL BLOCK
NHRS 065 (440-600V) & 90
X5,2
X13,2
X4,2
X4,1
SUPPORT PCB
J9
X10,1
X10,2
X10,3
J7
I
SWITCH
24V
TRANSFORMER
T1
SSR 1
L1
L1
C2
T1
SSR 2
L1
L2
C3
GND
C4
CONTACTOR 2
L3
SSR 3
T1
L1
C5
T1
SSR 4
L1
C6
C2
C2
C3
C3
C3
C1
Black-Red-Black
CONNECTOR
Red-Red-Red
CONNECTOR
C3
C2
C1
C6
C3
C5
C2
C6
C3
C1
C1
C1
C1
C3
C2
C2
C2
C1
C3
C2
C5
C1
C4
010-015 lbs/hr 1P
C3
030-045 lbs/hr 3P
C1
C4
065 lbs/hr (208-240V)
C3
C3
065-090 lbs/hr (440-600V)
C1
Red-Red-Red
CONNECTOR
Black-Red-Black
CONNECTOR
C1
010-015 lbs/hr 1P
Black-Red-Black
CONNECTOR
Red-Red-Red
CONNECTOR
Black-Red-Black
CONNECTOR
Red-Red-Red
CONNECTOR
Wiring diagram for NHRS 010-090 Humidifier
PRIMARY
TERMINAL
BLOCK
NOT PRESENT ON 1PH
OVER TEMP
SWITCH
CONNECTOR
(W-G-W )
J5
OPTIONAL REMOTE
STATUS PCB
OPTIONAL AUXILIARY
COOLING KIT
K4 Unit ON
K3 Service
K2 Error
K1 Steam
987654321
BREAKOUT PCB
10 11
UNIT
READY
J1
G
MAIN
PCB
R
J3
X15,1
X15,2
X15,3
X16,2
X16,1
J2
LCD DISPLAY
WATER LEVEL
BOARD
MID LEVEL G
LOW LEVEL
Y
R
R
Bl
X2,1
X2,2
X2,3
X2,4
HIGH LEVEL R
Bl
DRAIN
SWITCH
ENTER
KEYPAD
Bk
AC-DC +
RECTIFIER _
X1,1
X1,2
X1,3
X1,4
X1,5
X1,6
Figure 1. Wiring Diagram
10-40
Page 4
2008-02-01
MENU
ENTER
Bl
DRAIN
SWITCH
Bk
R
J5
CYLINDER 1
OVER TEMP
SWITCH
White-Green-White
CONNECTOR
FILL 3
(D.W.C.)
X 14
X5,2
A
C2
O
B
C
D
C2
T3
C3
E
C
F
24V
Black-Red-Black
CONNECTOR
CYLINDER 2
OVER TEMP
SWITCH
White-Green-White
CONNECTOR
Y
G
R
J7
A
C5
X10,1
X10,2
X10,3
B
X5,1
M
C
D
F
C4 C5 C4 C5
E
C6
C4 C6 C5
T3
C6
GND
Black-Red-Black
CONNECTOR
Red-Red-Red
CONNECTOR
3 POLE TERMINAL BLOCK
T2
C5
L2
L1
T1
T1
T1
L1
L1
L3
C4
SSR 2
MAIN
CONTACTOR
24 VAC
DRAIN PUMP
SSR 1
4 WIRES FROM
EACH TERMINAL
C6 C4 C6
X5,2
X4,2
X4,1
SUPPORT PCB
X13,2
X13,1
X 14
OPTIONAL SSR CONTROL
MID LEVEL
FILL 3
(D.W.C.)
LOW LEVEL
FILL 2
FILL 1
HIGH LEVEL
WATER LEVEL
BOARD
987654321
BREAKOUT PCB
10 11
Red-Red-Red
CONNECTOR
TRANSFORMER
BLOWER PACK
TERMINAL BLOCK
N0
DOOR
INTERLOCK
3 POLE TERMINAL BLOCK
C3 C1 C2 C1 C2
C1
T2
T1
L1
L1
T1
SSR 2
MAIN
CONTACTOR
24 VAC
DRAIN PUMP
T1
C3 C1 C3 C1 C3 C2
M
SSR 1
4 WIRES FROM
EACH TERMINAL
X5,1
X13,2
X13,1
X4,2
X4,1
SUPPORT PCB
X10,1
X10,2
X10,3
J7
3 2 1
6 54
SWITCH
I
OPTIONAL REMOTE
STATUS PCB
PRIMARY
TERMINAL
BLOCK
Figure 2. Wiring Diagram
OPTIONAL HYBRID OPERATION
FILL 2
FILL 1
LOW LEVEL Y
MID LEVEL G
HIGH LEVEL R
WATER LEVEL
BOARD
987654321
BREAKOUT PCB
10 11
UNIT
READY
J1
K2 Error
K1 Steam
K3 Service
K4 Unit ON
R
OPTIONAL AUXILIARY
COOLING KIT
X2,1
X2,2
X2,3
X2,4
LCD DISPLAY
J2
J6
G
MAIN
PCB
X16,2
X16,1
X15,1
X15,2
X15,3
J3
R
Bl
X2,1
X2,2
X2,3
X2,4
KEYPAD
R
AC-DC +
RECTIFIER _
Page 5
2008-02-02
X1,1
X1,2
X1,3
X1,4
X1,5
X1,6
Wiring diagram NHRS 135 / 180 HUMIDIFIER
10-40
X1,1
X1,2
X1,3
X1,4
X1,5
X1,6
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
Steam output: ____lbs./hr
Voltage: _____V/___ph
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 6
2008-02-01
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
High limit:
Air proving:
Mod controller:
Other:
Location/Wiring/Setting
_________________
_________________
_________________
_________________
POWER:
Voltage, amperage rating and fuse corresponds to Spec Label
Disconnect switch located close to humidifier
Field contact:___________________________ Signature:_______________________________
10-40
Page 7
2008-02-02
Humidifier Mandatory Start-up Checklist (p. 3 of 3)
Unit Serial #: ____________ # of humidifiers: ____________
Tag:_____________
Unit type: NHRS
Steam output: ____lbs./hr
Voltage: _____V/___ph
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:
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
10-40
Page 8
2008-02-01
3. MAINTENANCE CHECK LISTS
Maintenance Checklist (p.1 of 1)
Unit Serial #: ____________ # of humidifiers: ____________
Tag:_____________
Unit type: NHRS
Steam output: ____lbs./hr
Voltage: _____V/___ph
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.
10-40
Page 9
2008-02-02
THIS PAGE INTENTIONALLY LEFT BLANK
10-40
Page 10
2008-02-01
10-50
TECHNICAL
10-50
Page 1
2008-02-11
Figure 1. Exploded View - Plumbing
10-50
Page 2
2008-02-11
Table 1. Exploded View - Plumbing
10-50
Page 3
2008-02-11
Figure 2. Exploded View - Electrical
10-50
Page 4
2008-02-11
Table 2. Exploded View - Electrical
10-50
Page 5
2008-02-11
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.
INSTALLATION DATE (MM/DD/YYYY)
MODEL #
SERIAL #
CYLINDER #
Cylinder Replacement Date (MM/DD/YYYY)
U.S.A.
Walter Meier (Climate USA) Inc.
CANADA
Walter Meier (Climate Canada) Ltd.
826 Proctor Avenue
Ogdensburg, NY 13669
TEL: 1-866-NORTEC-1
EMAIL: [email protected]
WEBSITE: www.humidity.com
2740 Fenton Road
Ottawa, ON K1T 3T7
TEL: 1-866-NORTEC-1
FAX: (613) 822-7964
Authorized Agent:

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