AIRFOG
TM
Series
Atomizing
Humidifier
Installation Manual
2008-04-11
1502247-C
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TABLE OF CONTENTS
Subject
Page
10-00 INTRODUCTION
1.
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
AIRFOG DEFINITION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
NORTEC AIRFOG FAMILY OF PRODUCTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
AFE PRINCIPLE OF OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL AIRFOG TECHNICAL CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 3
ADIABATIC COOLING PHENOMENA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
HUMIDIFICATION ZONES (IN SPACE APPLICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
ABSORPTION DISTANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
COMPRESSED AIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
OLDER NORTEC AIRFOG SYSTEM COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION TOOLS AND EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
A.
B.
C.
2.
A.
B.
C.
D.
E.
F.
G.
10-10 INSTALLATION
1.
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
A.
NOZZLE SYSTEM LAYOUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.
ZONES
A.
B.
C.
D.
E.
F.
G.
H.
I.
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
SUPPLY FEED LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
MOUNTING OF NOZZLES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
CONNECTING NOZZLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SADDLE CLAMP INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
VACUUM VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
PILOT OPERATED AIR REGULATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
PRIMARY AIR PRESSURE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
PRIMARY WATER PRESSURE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
CONTROL PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
ELECTRICAL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
PILOT LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
J.
K.
L.
M.
10-20 MINI & OCTO INSTALLATION
1.
AFE SELF CONTAINED AIRFOG SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
AFE MINI SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
AFE OCTO SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
INSTALLATION PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
A.
B.
C.
10-30 START-UP PROCEDURE
1.
AFE, MINI, AND OCTO START-UP PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
COMPRESSED AIR SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
WATER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
SELF CLEANING CYCLE ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
SETTING THE SYSTEM FOR NORMAL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
A.
B.
C.
D.
E.
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10-40 SHUT-DOWN PROCEDURE
1. AFE, MINI, AND OCTO SHUT DOWN PROCEDURES. . . . . . . . . . . . . . . . . . . . . . . . . 36
10-50 MAINTENANCE
1.
2.
3.
4.
5.
6.
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
SEASONAL MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
SEASONAL STARTUP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
UNSCHEDULED MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
VACUUM VALVE TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
CHECKING FOR VACUUM LEAKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
10-60 TROUBLESHOOTING
1. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
10-70 SPARE PARTS
1.
SPARE PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
WARRANTY
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LIST OF FIGURES
Figure
10-10 INSTALLATION PROCEDURES
Page
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.
Typical Nozzle Layout for Wall Mounted System . . . . . . . . . . . . . . . . . . . . . . . . . 9
Multi Zone Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Water and Air Line Pressure Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Nozzle to Bracket Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
AFE Nozzle Ceiling Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Quick Release Fitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Saddle Clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Vacuum Valve Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Vacuum Valve Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Pilot Air Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Pilot Air Regulator Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Primary Air Pressure Control Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Primary Water Pressure Control Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Control Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Control Panel terminal Strip Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Schematic Plumbing Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
10-20 MINI & OCTO INSTALLATION
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Mini Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Plumbing End Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Octo Layout with Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Octo Spray Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Ceiling Mounting of Octo. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Octo Air and Water Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Four Octo Units with a Single Control Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
AFE Octo Nozzle Spray Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10-30 START-UP PROCEDURE
Figure 1.
Figure 2.
Capacity Output va. Vacuum Valve Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 33
AFE Capacity Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10-70 SPARE PARTS
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Octo Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
AFE Nozzle Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Vacuum Valve Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Control Panel Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
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LIST OF TABLES
Table
Page
10-60 TROUBLESHOOTING
Table 1.
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
10-70 SPARE PARTS
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Rebuild Kits and General Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Octo Spare Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
AFE Nozzle Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Vacuum Valve Spare Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Control Panel Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
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10-00
INTRODUCTION
10-00
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1. INTRODUCTION
NOTE
Prior to installing any AIRFOG product carefully READ through this entire guide, it contains
valuable information, which will assist in all aspects of the installation.
A. AIRFOG DEFINITION
(1) NORTEC AIRFOG systems use the nozzle humidification technology of injecting
droplets of cold water directly into the air. This method of humidification has the
following advantages over steam humidification:
(a) Lower frequency of maintenance.
(b) Systems are mainly mechanical (water pipes and air pressure) with only a 24
VAV power requirement in the control panel.
(c) A “no cost” air cooling benefit due to latent heat of vaporization extracting
heat from the air.
(d) Maintenance is primarily focused on keeping the air compressor operational.
(e) Change of components is fast and requires minimal system disassembly.
B. NORTEC AIRFOG FAMILY OF PRODUCTS
(1) The AirFog family is Nortec most advanced adiabatic humidifiers. There are
groups of products that fall in this family: applied products and packaged products.
(2) The applied products group describes systems that are tailored specifically for
each application. Two products fall under this category:
(a) HP HVAC uses high-pressure water to create a very fine mist for spray into
ducts and air-handlers.
(b) AFE Nozzle systems use compressed subsonic air flows and water to create
a fine mist that is sprayed directly into a space.
(3) The packaged products group describes systems that are ready to operate out of
the box, and need only be connected to power, air, and water. These products
include:
(a) AFE Mini: Systems are wall mounted and have 1 or 2 AFE nozzles.
(b) AFE Octo: Systems are ceiling mounted and available in many configurations
including modulating versions, and have between 3 and 8 AFE nozzles.
(4) This manual describes the installation, operation, and maintenance of all AFE, Mini
and Octo systems.
C. AFE PRINCIPLE OF OPERATION
(1) The AFE nozzle uses air flow and the Bernoulli principle to siphon water out of
zero psig water distribution pipes. Increases in air velocity (by increasing air
pressure) will increase the vacuum pressure and increase the rate that water is
siphoned into the nozzle. As the water exits the nozzle it is broken down into a
fine mist by a shearing action. Increases in air supply pressure also means that
the exiting mixed flow is at a higher velocity.
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(2) Since AFE nozzle systems use a zero psig water pressure feed network, the
water feed system and nozzles must be horizontal and at the same height as
the water pressure reduction regulator (vacuum valve). Valleys or dips in
altitude will adversely affect performance and in extreme cases will prevent the
nozzles from producing any output. If obstructions prevent straight level piping,
the water and air network delivery pipes must be routed under the obstruction.
It is vital that the water pipes, downstream of the vacuum valve, never be
elevated higher than the nozzles.
2. GENERAL AIRFOG TECHNICAL CONSIDERATIONS
A. ADIABATIC COOLING PHENOMENA
(1) There are no heating elements in any of NORTEC’s AIRFOG humidifiers. Water is
injected directly into the air at the temperature it is supplied. As the droplets
evaporate they extract the required latent heat of vaporization from the surrounding
air, causing the temperature of the air to decrease. This could be a significant
energy saving technique if mechanical cooling is required. Since humidification is
most often required when the exterior atmospheric temperature is below room
temperature, there is a necessity to warm the air either prior to addition of the
water droplets or after absorption of the droplets into the air. It is recommended to
add the moisture after the air is heated as this dramatically reduces the time and
distance taken for the water droplets to evaporate.
B. HUMIDIFICATION ZONES (IN SPACE APPLICATIONS)
(1) The movement of humidity through a space is very rapid. In applications where
accurate humidity control is essential, it is important that the structure be reasonably
air-tight to prevent humidity from escaping to the outside. If a large amount of
infiltration or exfiltration is encountered it may be necessary to oversize the system to
compensate for this.
(2) AFE systems are frequently used in large factory applications for dust and static
suppression. Often these structures have large doors open for loading and
unloading of goods. Keeping doors closed, except when needed for movement of
goods, can improve the performance of the humidification system by containing
humidity levels within the space.
C. ABSORPTION DISTANCE
(1) Water mist sprayed by the AFE nozzle requires a certain distance to be absorbed by
the air. Absorption distance is affected by many factors including temperature,
existing humidity levels and air pressure. However, in general increasing the air
pressure (and hence the water flow) to the nozzle will increase the absorption
distance since more water is being sprayed. It is important to follow the clearances
in this guide to prevent the accidental wetting of structures or machinery.
D. COMPRESSED AIR
(1) NORTEC AIRFOG systems use compressed air as the control fluid. Compressed air
is provided by a compressor (supplied by others) or series of compressors. The
modular approach to the NORTEC AIRFOG systems permits the designer to
consider the cost implications of using multiple smaller horsepower compressors
rather than one very large compressor. By using a multiple compressor design
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solution, system reliability is increased, maintenance is possible without shutting
down all zones, and capital cost is often reduced.
(2) It is recommended that air free of oil and moisture (control quality air) be used with
AIRFOG systems. All air compressors will produce moisture, which must be
removed using a refrigerated air dryer. Excessive amounts of water in the air lines
will reduce nozzle performance, and in extreme cases will prevent the nozzle from
producing any mist. Oil must also be removed from the compressed air through the
use of oil removal filters.
(3) Air pressure loss can be managed by reduction in the air pipe length, elimination of
unnecessary elbows, valves and flow restrictions, increasing the diameter of the
primary delivery pipe to the zones and elimination of leaks.
E. OLDER NORTEC AIRFOG SYSTEM COMPONENTS
(1) This document is applicable to all NORTEC AIRFOG system components purchased
after February 2004. If the designer has existing system components purchased
prior to February 2004, the Nortec Technical Service Department should be
consulted to determine compatibility with the newer equipment, parts and external
interfaces.
F. INSTALLATION TOOLS AND EQUIPMENT
(1) The designer should have already provided drawings of the proposed AIRFOG
humidification system physical layout. These drawings and parts list should clearly
identify the system components by name and part number, physical spacing, zone
identification and comments on nozzle location and pointing directions.
(2) During installation there will be a requirement to:
(a) Attach mounting brackets to walls, ceilings or other structures, which may be
higher than six feet off the floor.
(b) Cut and join copper, stainless steel or plastic pipe using standard plumbing
joining techniques.
(c) Connect low voltage wiring to the control panel.
(d) Connect plastic tubing.
(e) The installer should have all the tools and be certified to perform these
plumbing, mounting and electrical tasks.
G. PARTS
(1) A parts list should be included with the drawings developed by the designer. Not all
the necessary parts are provided by Nortec. The following parts are supplied by
others:
(a) Pipe, elbows, pipe hanger and mounting hardware for inside HVAC units, T-
joints, pipe size adapters, Teflon sealing tape and other plumbing supplies from
a local plumbing supplier. Pipe material is either copper, stainless steel or
plastic and should be specified on the designer produced drawings.
(b) Wire for the electrical connections is 18 gauge standard insulation, which can
carry 24 Volts AC at 1 amp. This wire can be purchased from most electrical
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suppliers.
(c) Nails, screws, bolts, threaded rods, anchors, rivets etc. to attach mounting
brackets to the structure. The fasteners used will depend on the material used
in the mounting surface.
(d) Insulation for the cold water pipe feeding the system is required to prevent
water vapor from condensing and dripping on other structures, machines,
personnel or materials.
(e) The NORTEC supplied parts should be checked against the designer’s
drawings and parts list to ensure the correct quantity of the correct part
numbers are available.
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10-10
INSTALLATION
10-10
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1. INSTALLATION
A. NOZZLE SYSTEM LAYOUT
(1) If a drawing for the proposed system was not supplied, then it is recommended that
one be created prior to installing the system. With reference to the AIRFOG
Engineering Manual, review the site where the nozzle system is to be installed.
The location of equipment, lights, pillars and other structures should be drawn on
the floor plans. The proper selection and location of the nozzles is very dependent
upon these obstructions. Figure 1 Typical Nozzle Layout, can be used as a guide
for identifying the various components used with a system.
(2) The supply and feed lines for the system should be kept in straight unobstructed
lines where possible. Air and water distribution network pipes are to be
installed level along walls, pillars or hung from the ceiling. Avoid placing the
lines over top of equipment and other areas, which will make it difficult to gain
access at a later date. If the lines have to be routed around an obstacle such
as a beam, always go under the obstacle, never over it.
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Figure 1. Typical Nozzle Layout for Wall Mounted System
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Figure 2. Multi Zone Layout
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2. ZONES
A. INTRODUCTION
(1) It may be necessary to break down the space to be humidified into zones.
Limitation of the control devices and maximum run of feed piping may indicate the
need for multiple zones. Refer to the Engineering manual for detailed limitation of
components. Up to four zones can be controlled from one control panel, additional
zones can be added with the use of a pilot air regulator acting as a volume booster
for the pilot signal. See Figure 2 Multiple Zone Layout.
B. SUPPLY FEED LINES
(1) Main supply lines connecting to the system must be sized to handle system flow
volumes and pressures. Connections to each zone should have an isolation valve
installed by using a NORTEC supplied primary pressure control section as
illustrated in Figure 3 Water and Air Line Pressure Control. Primary air pressure
feed to each zone should not exceed 90 psig. Water feed pressure is not to
exceed 25 psig for AFE, Mini and Octo hardware. Supply water pressure is not to
exceed 65 psig for AFD systems.
(2) Both water and air lines must be installed as per the mechanical drawings using
standard plumbing joining techniques. The spans must not be greater than 5 feet
without a supporting bracket. For long runs of piping, expansion joints may be
needed and these joints must meet local building codes. When using Nortec
supplied saddle clamps, the maximum line size for supplying to nozzles is 11/16”
O.D. If saddle clamps by others are used, please size fittings to match the pipe.
C. CLEANING
(1) Manual valves must be installed at the ends of all lines to facilitate cleaning and
drainage of lines. Cleaning is done by temporarily connecting the pipes to a
compressed air source at one end of the pipe. The other end of the pipe must not
be connected to any equipment but be free to allow the egress of foreign matter.
Care must be taken to protect personnel, animals, machines or other sensitive
material from the potentially hazardous and contaminating matter, which will exit at
high speed from the opening.
NOTE
Cleaning of the lines of all foreign material prior to connecting any system
component is critical, failure to maintain clean lines may void the warranty.
D. MOUNTING OF NOZZLES
(1) Each supplied NORTEC nozzle has a 3/8” NC 16 threaded port on the under side
of the nozzle which is used to fasten the nozzle to a mounting bracket, as
illustrated in Figure 4 Nozzle To Bracket Interface or Figure 5 AFE Nozzle Ceiling
Mounting. If other than NORTEC supplied mounting hardware is to be used,
ensure correct bolt and thread size is used. Nozzles can be mounted in any
elevation angle as water throughput capacity is not affected by this orientation.
However, AFE nozzle capacity is sensitive to vertical height differences to the
vacuum valve. The maximum nozzle installation height allowable above the water
supply line is 12” (30 cm).
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Figure 3. Water and Air Line Pressure
Control
Figure 4. Nozzle to Bracket Interface
Figure 5. AFE Nozzle Ceiling Mounting
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E. CONNECTING NOZZLES
(1) All the supplied nozzles have two inlet ports with push in, quick release style
fittings as shown in Figure 6 Quick Release Fittings. These fittings are only
designed for use with 1/4” O.D. plastic tubing. If other than NORTEC supplied
tubing is to be used, it must be a high grade uniform tubing from a reputable
supplier.
(2) The NORTEC supplied fitting uses an o-ring to seal the O.D. of the tubing and
finger clamps to hold it in place. Failure to use proper size tubing may result in
poor sealing and cause system failure. The tubing MUST be cut square using a
knife or plastic tube cutter rather than pliers. To connect the tube to the nozzle
simply push the tubing into the nozzle fitting until it reaches the bottom. Gentle
pulling of the tube without movement is a good indication that a proper seal has
been made.
(3) Allow enough free tubing to permit the nozzle to swivel horizontally or vertically for
future pointing alignment.
F. SADDLE CLAMP INSTALLATION
(1) The type of clamp used by NORTEC, as shown in Figure 7 Saddle Clamp, requires
that the pipe be drilled first. Drill a 1/4” hole squarely into the air and water pipes
close to each nozzle within 24” (60 cm). Place the sealing gasket on the male part
of clamp, insert it into the drilled hole, then clamp it into place using the provided
screws. The saddle clamp has a 1/8” FNPT port; install either the supplied
compression fitting or another style fitting suitable for plastic tubing. Two saddle
clamps, one for air and one for water, are required for each nozzle.
NOTE
Not to be used with DI water.
For DI water use stainless steel tee.
Figure 6. Quick Release Fitting
Figure 7. Saddle Clamp
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G. VACUUM VALVE
(1) The vacuum valve must be centrally located so there are approximately an equal
number of nozzles being fed from each of its two output ports (one on the left side
and the other on the right side). There is a mounting bracket supplied with each
vacuum valve. Figure 9 Vacuum Valve Interfaces illustrates the plumbing interface
details. Elevation of the valve is very critical, as is the positioning of the nozzles.
The maximum height above the nozzle supply line the valve should be installed is
12” (30 cm). Never install the vacuum valve lower than the nozzle water feed
lines.
(2) The water flow rate through this valve is limited to 24 GPH, which limits the number
of AFE nozzles it can supply to 16. If more than 16 nozzles are to be installed,
then the system must be broken into zones using multiples of 16 (or less) nozzles
with each zone controlled by its own vacuum valve. One control panel can control
multiple zones by “T” ing off the single control panel air pilot output.
(3) Air pressure from the control panel is used to open the water safety valve
permitting water to enter the vacuum valve, which controls the water feed to the
nozzles. Figure 8 Vacuum Valve Operation explains the operation of this water
regulator. The vacuum valve assembly has three sub-components. As illustrated
in Figure 9 Vacuum Valve Interfaces. First, the safety valve interfaces directly with
the primary water supply to open or close on command from the control panel.
Loss of pilot air pressure (below 10 psig) will automatically close this valve to
prevent water proceeding beyond this point. In series with, and downstream of the
safety valve, is the water regulator. The water regulator is used as the first stage
of water pressure reduction. The water regulator reduces the supply water
pressure to a range between 5 and 10 psig. This is set manually at time of
installation. Please note that system performance is not sensitive to the exact
setting as long as the pressure is within this range.
(4) The second stage of water pressure reduction is the vacuum diaphragm, which
drops the pressure to ambient (0 psig). Output is through two exit ports on the
underside of the vacuum valve. This permits the nozzle to draw water from the
supply as required rather than having pressure force it into the nozzle. The
siphoning action of the nozzle is controlled by the pilot operated air regulator.
(5) On top of the vacuum valve is a thumb wheel adjustment for adjustment of the
AIRFOG droplet size. The adjustment changes the volume of water to the nozzles.
A reduction in available water for a constant air flow results in smaller droplets and
a finer spray. This adjustment can be used to reduce the water throughput if there
is a problem with water droplets reaching the floor.
H. PILOT OPERATED AIR REGULATOR
(1) The pilot operated air regulator controls the air supply to the nozzles and is illustrated
in Figure 11 Pilot Air Regulator. The pilot regulator is modulating flow controller
rather than a simple On/Off valve. The greater the pilot air pressure, the greater the
air pressure fed to the nozzle supply network. This means that the Control Panel is
able to request a proportional opening of the Air Regulator simply by varying the pilot
pressure. There is a linear 1:1 relationship between the pilot pressure and the output
pressure drop. A pilot air pressure of 25 psig (172.5 kPa) will drive the air regulator
to have an output of 25 psig (172.5 kPa). A pilot pressure of 50 psig will drive the air
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regulator to have an output of 50 psig. The pilot air pressure range is from 0 to 70
psig.
(2) The four ports on the pilot operated air regulator are the pilot air pressure input from
the control panel, the primary air supply input feed, the output air feed to the nozzles
and to gauge port used to feed pilot signal to the water regulator. There are no
manual adjustments required.
(3) Install the pilot air regulator on the feed line before the nozzles by splicing into the air
feed line to the nozzles. See Figure 11 Pilot Air Regulator Installation. Ensure the
proper flow direction when installing this device.
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Figure 8. Vacuum Valve Operation
Figure 9. Vacuum Valve Interfaces
Figure 10. Pilot Air Regulator
Figure 11. Pilot Air Regulator Installation
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I. PRIMARY AIR PRESSURE CONTROL
(1) The primary air pressure control section (with the shutoff valve) is connected to the
air compressor or the compressed air source as specified in the Designer
produced drawings. See Figure 12 Primary Air Pressure Control Section.
J. PRIMARY WATER PRESSURE CONTROL
(1) The primary water pressure control section connects the main water supply. The
shutoff valve end of section is the inlet. The gauge end of the section is joined to
the water inlet of the vacuum valve for AFE systems. See Figure 13 Primary Water
Pressure Control Section.
K. CONTROL PANEL
(1) Bolt the panel directly to the surface through the mounting holes. Place the panel
level against the surface and mark locations for holes to be drilled. Remove the
panel and drill 2 holes (hole size to match field supplied lag bolts and anchors).
Place panel over the holes and secure it using bolts.
L. ELECTRICAL WIRING
(1) Electrical connections of the control panel use 18 ga wire for all external wiring.
The control panel requires 24 VAC, which is provided by the NORTEC supplied
step down transformer (120 VAC to 24 VAC). The transformer plugs into any
standard 120 VAC outlet that must be located within 6’ (six feet) of the control
panel. Power is connected to the low voltage terminal trip located inside the panel
as illustrated in Figure 16 Control Panel Terminal Strip Interfaces. Control panels
are supplied by NORTEC in two configurations. The first is for use with systems
that are designed to operate with only an On/Off humidistat and the second is
designed to operate with a modulation controller. Within the control panel there is
a 7 point terminal block, terminals 6 & 7 are for power voltage 24 VAC. A wiring
diagram is provided with each control panel. Both control panels reserve terminals
1 & 2 are for on/ off control wiring which may be a simple humidistat, a relay for
remote operation or other interlock devices (dry make break contacts).
(2) Modulation controlled systems use terminal 3, 4 & 5 on the 7 terminal block strip as
follows: terminal 3 is to be connected to the “+” terminal on the controller, terminal
4 is to be connected to the “-“ terminal on the controller and terminal 5 is for 24
VAC supply to the controller. This is illustrated in Figure 15 Control Panel Terminal
Strip Interfaces.
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Figure 12. Primary Air Pressure Control
Section
Figure 13. Primary Water Pressure Control
Section
Figure 14. Control Panel
Figure 15. Control Panel Terminal Strip
Interfaces
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M. PILOT LINES
(1) All air pressure lines connecting to the control panel must be 1/4” O.D. plastic
tubing rated for 150 psig. Figure 16 Schematic Plumbing Layout illustrates the
proper connections of the air supply to and from the control panel to the vacuum
valve and the pilot air regulator. The control panel requires an input pneumatic
(air) control supply, which is usually tapped off the main air supply line upstream of
the pilot air regulator. The control panel has two pneumatic fittings located on its
top plate; one marked “pilot in” and the other marked “pilot out”. The “pilot in” is
connected to the control supply with the 1/4” plastic tubing. A second 1/4” line
connects the “pilot out” to both the pilot air regulator and the vacuum valve using a
“T” connector.
Figure 16. Schematic Plumbing Layout
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10-20
MINI & OCTO
INSTALLATION
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1. AFE SELF CONTAINED AIRFOG SYSTEMS
A. AFE MINI SYSTEMS
(1) AFE MINI systems are self-contained packaged systems that include all necessary
components.
(2) They require the following connections:
(a) 3/8” O.D. plastic or soft copper water supply line rated at a minimum of 25
psig.
(b) 1/4” O.D. plastic or soft copper air supply line rated at a minimum of 90 psig
(c) Isolation valves for both air and water lines
(d) Mounting hardware
(e) Support anchors
(f)
1/4” lag bolts
(g) 120 VAC standard electrical receptacle
(h) Humidity control device (Humidistat)
(3) The best location for a MINI is on a wall or column with the mist discharging down
an aisle where it will not condense on solid surfaces. A clear run of at least 15 feet
forward of the nozzles is normally a sufficient distance for complete absorption.
Adiabatic cooling may be uncomfortable to people occupying workstations directly
beneath the Mini systems.
(4) The Mini nozzles must be a minimum of 6 feet above the floor and 36” below the
ceiling in order to prevent condensation on these surfaces. See Figure 1 Mini
Installation.
(5) Four accessible internal mounting holes are located in each corner of the rear
panel. The mounting procedure is:
(a) Either attach the supplied mounting bracket hardware or bolt panel directly
onto the wall surface via the mounting holes.
(b) Place the panel level against the surface and mark the drill holes.
(c) Remove the panel and drill the holes (hole size to match field supplied lag
bolts and anchors).
(d) Replace the panel and secure using bolts.
(6) Install water and air supply lines. Both water and air lines should have an isolation
valve installed near the unit. Water connection at the unit is designed for 3/8”
plastic tubing but if soft copper pipe is to be used, replace the plastic sleeve in the
fitting with the supplied brass sleeve. The air connection is designed for 1/4”
plastic tubing. Figure 2 Plumbing End Connections illustrates details of the
interfaces.
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Figure 1. Mini Installations
Figure 2. Plumbing End Connections
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B. AFE OCTO SYSTEMS
(1) Octo systems are partially self contained and are between the simple Mini self-
contained installation and the modular AFE systems. The Designer’s drawings and
parts list will define the configuration. The only installation difference between the
full modular system and the Octo is that the vacuum valve and pilot air regulator
are located inside the Octo case as illustrated in Figure 3 Octo Layout and
Interfaces.
(2) The Octo interfaces are:
a. 3/8” O.D. plastic or soft copper water supply line rated at a minimum
pressure of 25 psig
b. ½” O.D. plastic or soft copper air supply line rated at a minimum pressure
of 90 psig
c. 1/4” O.D. plastic tubing for command air pressure (pilot air)
d. Isolation valves for both air and water lines
e. Hanging hardware
i. Chains
ii. Threaded rod
iii. Support anchors
f. AFE Control panel
g. 120 VAC standard electrical receptacle
h. Humidity control device (Humidistat)
C. INSTALLATION PROCEDURE
(1) Octo units are designed to be suspended from the ceiling by either a threaded rod
or chains. Octos with nozzles on only one side may also be mounted on a wall or
pillar (single sided configurations). Prior to mounting, ensure there are no
obstacles such as duct work, lighting, large equipment, etc., Please refer to Figure
4 Octo Spray Pattern for further information. The Octo unit should be installed as
high as possible above the floor, any equipment or work space. Adiabatic cooling
maybe uncomfortable to people occupying workstations directly beneath the Octo
systems. The recommended height above the floor is 20 ft (6.1 m) and 18” below
ceiling joists.
(2) When using chains to suspend the Octo, ensure the chains are rated for the units
weight (64 lbs) and that all local building codes are followed.
(3) In general:
(a) Each Octo weighs up to 64 lbs (29 kg).
(b) Install the four 3/8” NC eye bolts into the four mounting holes on the unit
using the supplied lock washers & nuts.
(c) Install field supplied supporting chains or rods from the ceiling then raise the
unit up into location and secure in place.
NOTE
Always hang units, never use a cradle assembly, which can interfere with spray
pattern or restrict access for service.
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Figure 3. Octo Layout with Interfaces
Figure 4. Octo Spray Pattern
(4) Mounting using threaded rods requires installing field supplied 3/8” NC supporting
rods from the ceiling, raising the unit up into location and securing it to the support
rods using the supplied washers and nuts.
(5) Both water and air lines should have an isolation valve installed near the unit as
illustrated in Figure 6 Octo Air And Water Interfaces. Water connection at the unit
is designed for 3/8” plastic tubing; however, if soft copper pipe is to be used,
replace the plastic sleeve in the fitting with the supplied brass sleeve. Air
connection is designed for ½” plastic tubing. If soft copper pipe is to be used,
replace the plastic sleeve in the fitting with the supplied brass sleeve.
(6) For a standard Octo unit, a separate control panel and 1/4” O.D. plastic tubing for
pilot line is required. To install this line the fitting on the unit is a push in style
located above the main air connection. Simply cut the tubing square and push one
end into the fitting. Route the line back to control panel location.
(7) If multiple Octo units are to be controlled from a single control panel then “T” off the
pilot air pressure line to connect the other OCTO units as illustrated in Figure 7
Four Octo Units With A Single Control Panel. If more than four Octo’s are to be
controlled from one control panel, use a pilot air regulator or a volume booster for
the pilot line.
(8) Octo Plus units do not require a separate control panel as there is one mounted
within the unit. All that is necessary is to connect it electrically as explained in this
manual under Electrical Wiring.
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(9) Control Panel installation for standard Octo hardware is explained in the under
Control Panel section.
(10) The nozzles on the Octo units are pointed straight forward when shipped but these
can be oriented in any direction that will not have the plume strike a solid object or
another plume for at least 16 feet. Figure 9 AFE Octo Nozzle Spray Pattern helps
in visualization of these AIRFOG plumes.
(11) The center vertical rail is to be mounted in the center of the duct and attached to
the manifold rails using the supplied hardware. It is important that the center
vertical rail is sized correctly and securely fastened to the top and bottom of the
duct.
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Figure 5. Ceiling Mounting of Octo
Figure 6. Octo Air and Water Interfaces
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Figure 7. Four Octo Units with a Single Control Panel
Figure 8. AFE Octo Nozzle Spray Pattern
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10-30
START-UP
PROCEDURE
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1. AFE, MINI, AND OCTO START-UP PROCEDURES
A. INTRODUCTION
(1) The operator must make reference to Figure 1 Typical Nozzle Layout when
following these instructions. Prior to startup, ensure the following:
(a) All components have been visually checked for proper connections.
(b) All supply and feed lines have been cleaned.
(c) The on/off valve of the primary water pressure control section is OFF.
(d) Water at 25 psig pressure from the main supply is ON.
(e) The on/off valve of the primary air pressure control section is OFF.
(f)
The air compressor is running and providing a minimum of 90 psig.
(g) The control panel switch is OFF.
(h) The 24 VAC transformer is plugged into a 110 VAC source and the control
panel power indicator light is illuminating.
(i)
The humidistat is set at 100% relative humidity.
B. COMPRESSED AIR SUPPLY
(1) The clean out valves on the ends of the supply pipes must be closed.
(2) The on/off valve of the primary air pressure control section is opened to the ON
position. The handle should be in line with the pipe (as opposed to 90 degrees to
it).
(3) The control panel switch is turned to the ON position.
(4) Adjust the air pressure regulator in the control panel to about 70 psig to obtain
maximum water throughput for each nozzle for this startup test.
(5) There should an audible hissing sound as the compressed air works its way
through the piping to the nozzles. If this is not detected and air can not be felt by
hand directly in front of the nozzle orifice, then air is not being provided to the
system. Check the compressed air line back to the compressor for other valves
that may not be open.
(6) The air pressure regulator knob in the primary air pressure control section is to be
adjusted until its gauge indicates 90 psig.
(7) Most significant air pressure leaks can be detected by sensing the air flow with the
hand or by spraying on soapy water to observe the growth of bubbles around the
leak. If an AFE nozzle is sucking some air rather than 100% water through the
water pipes, the nozzles will sputter/spit and behave irregularly as opposed to a
steady production of uniform mist. A thorough survey should be conducted to
identify and fix leaking joints.
C. WATER SUPPLY
(1) The clean out valves on the ends of the water supply pipes must be closed.
(2) The on/off valve of the primary water pressure control section is turned ON. The
handle should be in line with the pipe (as opposed to 90 degrees to it).
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(3) Adjust the water regulator valve in the primary water pressure control section until
the gauge reads 25 psig.
(4) The pressure regulator on the vacuum valve should be adjusted to read between 5
and 7 psig.
(5) Manually depressing the thumb screw on top of the vacuum valve will permit water
to flow into the pipes and fill them.
(6) AIRFOG water throughput can be controlled at the control panel by adjusting the
air pressure. This air pressure must never be greater than 75 psig. If water spray
should reach the floor, then the water throughput can be reduced by adjustment
AFE, Mini and Octo systems.
(7) Reducing the air pressure feed to the nozzles. Refer to Figure 1 Capacity Output
vs. Vacuum Valve Adjustment and Figure 2 AFE Capacity Chart.
(8) Water flow through the nozzles can be adjusted using the thumb-wheel on the
vacuum valve. Turning the thumb-wheel clockwise will lower water flow through
the valve, which will cause a finer mist from the nozzles and a lower capacity.
Turning the thumb-wheel counterclockwise will raise the water flow through the
valve, which will cause a coarser mist from the nozzles and increased capacity.
The optimal setting for the valve is a balance between capacity and spray length.
If the spray is reaching the floor or wetting equipment, try turning the thumb-wheel
clockwise. If the room is not receiving enough humidity, try turning the thumb-
wheel counter-clockwise. Some experimentation may be necessary to obtain the
best results. Please refer to Figure 1 Capacity Output vs. Vacuum Valve
Adjustment for more information.
D. SELF CLEANING CYCLE ADJUSTMENT
(1) The AFE, Mini, and Octo Systems all feature an automatic self-cleaning
mechanism that prevents mineral build-up or dirt from affecting nozzle
performance. This mechanism activates whenever air pressure falls below 10
psig. This will occur every time the humidistat cycles the nozzles off based on
demand, or when the unit is manually switched off. Additionally, a timer is included
that allows the user to set automatic cleaning cycles (off time), which occur after a
period of operation.
(2) The timer is a white box with several dials on the front of it. The timer can be
removed (after the unit has been powered off) for ease of adjustment; simply pull
on the timer to remove it. To adjust the timer:
(a) The upper white dial and blue dial control the length of the time the system
will remain on for (Ton). The white dial is used to set the scale, and the blue
dial is used to set the value. For example, to have the unit remain on for 4
hours before powering off, turn the white dial to point at 1-10h, and then turn
the blue dial to point at 4.
(b) The lower white and blue dials control the length of time the system will
remain off for one the timer cycles it off (Toff). The white dial sets scale, and
blue dial sets the value. For example, to have the unit remain off for 2
minutes, set the white dial to 1-10min, and then turn the blue dial to point at
2.
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(3) If the timer were set as in the above examples, the system would run for 4 hours,
shut off for 2 minutes, run for another 4 hours, shut off for 2 minutes, and so on
and so forth.
NOTE
The humidistat takes precedence over the timer for shutting down the system. If the
humidistat reaches its set point, it will shut the system off regardless of the timer to
prevent over humidifying the space.
(4) The factory default setting for the timer is 2 minutes of off time (cleaning time) after
every 8 hours of operation. Using settings that result in an off time of less than 10
seconds are not recommended. As well, using settings that result in an on time of
less than 15 minutes are not recommended.
E. SETTING THE SYSTEM FOR NORMAL OPERATION
(1) Once the start-up and adjustment, and configuration procedures have been
completed the unit is ready to operate normally. The following steps complete the
start-up procedures:
(a) Close and lock all covers including the control panel covers.
(b) Tighten the lock nuts on the primary air and water regulators.
(c) Set the humidistat to the desired level.
(2) The AirFog humidification system is now ready to operate normally.
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Figure 1. Capacity Output vs. Vacuum Valve Adjustment
Figure 2. AFE Capacity Chart
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10-40
SHUT-DOWN
PROCEDURE
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1. AFE, MINI, AND OCTO SHUT DOWN PROCEDURES
A. Controlled system shutdowns are conducted for either maintenance (scheduled or
repair) or long term seasonal reasons. If the shutdown is for short term maintenance
then it may be possible to shorten this full procedure.
B. The following procedures are the recommended method to manually terminate AIRFOG
operations for long periods of time. Typically this would be after the heating season
(winter) is over.
(1) Turn off the water supply valve on the primary water pressure control section
(2) Allow 10 minutes of operation to extract as much of the water as possible from the
water pipes.
(3) Open the clean out valves on the water supply lines to permit the AFE system to
drain the remaining water from the pipe and drain the system of water. A bucket
should be used to collect any water that may exit the pipe at the clean out valve.
(4) Disconnect the 24 VAC transformer from the 110 VAC supply.
(5) Turn off the air supply valve on the primary air pressure control system.
(6) Turn the system off at the control panel.
(7) Turn the air compressor off.
C. For long periods (weeks or longer) of system down time, it is recommended that high
pressure air is used to blow all water out of the system.
D. It is important to NOT undertake disconnection and removal of components when they
are connected to or are part of the delivery system of either air or water under pressure.
Turning the master switch off in the control panel will isolate all high pressure water
system components downstream of the vacuum valve (AFE systems). This control
panel switch will also isolate all high pressure air system components downstream of the
pilot air regulator. This is often all that is required.
E. If there is any doubt about whether a component, pipe or tube is under pressure, then
turn off the main switch in the control panel, turn off the water pressure at the main water
pressure control section and turn off the air pressure at the primary air pressure control
section. Bleed off the remaining pressures prior to disconnection of any plumbing
interface fittings.
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10-50
MAINTENANCE
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1. MAINTENANCE
A. The two most probable maintenance problems are:
(1) The accumulation of dirt and mineral deposits in/on the nozzle
(2) Air and water leaks that may be due to marginal workmanship during installation
but not obvious until after many hours of operations.
B. Nozzle cleaning is recommended at least once a year. Remove the nose cone from the
nozzle body by turning it by hand and mechanically remove deposits by gentle scraping
or scrubbing with a brush or steel wool. Care must be taken not to damage the nozzle
or its surfaces. Wipe clean using a clean dry rag.
C. Leaks in the air and water delivery system could develop over time as the mechanical
seals age. Full nozzle replacement, taken from the spare parts purchased as part of
initial acquisition, is the recommended maintenance procedure if a nozzle should cease
to perform. The nozzle can be repaired back at the workshop using a Level III
maintenance nozzle repair kit. Leaks in the piping can be repaired using standard
plumbing methods.
D. Leak repair kits for the AFE nozzle, Vacuum Valve, Air Regulator and the Water
Regulator are available. Instructions are provided with each kit.
2. SEASONAL MAINTENANCE
A. In most cases there is a humidification season but if this is not the case, it is
recommended that the following actions be conducted once a year.
(1) A detailed visual leak inspection using soapy water and low pressure (less that 10
psig) of all air and water transport pipes and system components is to be recorded
on a sketch to indicate leak locations and severity.
(2) Comparison with previous inspection records could indicate systematic problems
as compared to random events.
(3) Repair leaks and verify the system is fully operational using the procedure
described in the Start Up section of this guide.
(4) The AIRFOG system is to be shutdown in accordance with the procedure
described in the Shut Down section of this guide.
(5) Each nozzle shall be cleaned of mineral water deposits and accumulated dirt using
the procedure described in the Maintenance section of this guide.
(6) Each nozzle should be lubricated using a silicone based lubricant.
(7) The compressor manual should be consulted for its recommended seasonal
maintenance.
3. SEASONAL STARTUP
A. A detailed visual inspection of all air and water transport pipes and components is to be
recorded on a humidification system sketch to indicate damage, non-conformances and
abnormalities.
B. Comparison with previous inspection records could indicate systematic problems as
compared to random events.
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C. Repair the identified problems and verify the system is fully operational using the
procedure described in the Start Up section of this guide.
4. UNSCHEDULED MAINTENANCE
A. Normally an unscheduled maintenance activity is initiated by an observation of a leak or
other failure.
(1) The AIRFOG system is to be shutdown in accordance with the procedure
described in the Shut Down section of this guide.
(2) Execute repair action either by repairing the leak or replacement of the suspected
component.
(3) Record the date, nature of the problem, the repair action taken, other pertinent
details and sign the failure report.
(4) Comparison with previous inspection records and failure reports could indicate
systematic problems as compared to random events.
(5) Verify the system is fully operational using the procedures described in the Start
Up section of this guide.
5. VACUUM VALVE TESTING
A. Setup for test:
(1) Adjust air feed pressure from the control panel to 70 psig.
(2) Adjust water feed to vacuum valve to 25 psig.
(3) Adjust vacuum valve regulator to 7 psig. (This adjustment cannot be made until
the system is turned on and a pilot signal of 15 psig or greater is applied.)
(4) Adjust vacuum valve thumb wheel to zero force (spring backed off).
B. While system in operating, visually watch the spray pattern from the nozzles.
C. If the system is completely sealed (no vacuum leaks in the water line) then once the
system is turned on for the first time all nozzles should start spraying starting with the
nozzles closest to the vacuum valve. The negative pressure created in the water line by
the high velocity air exiting the nozzles will cause the water line to fill with water, the
farther the nozzle is from the vacuum valve the longer it will take for the water to reach
that nozzle. Once the system has gone through the priming stage, it should start
spraying within seconds after the system has been turned on after a shut down. The
priming stage should not take any longer than five minutes. If the system fails to fully
prime after five minutes this may indicate a problem.
6. CHECKING FOR VACUUM LEAKS
A. The best way to check for leaks is to disconnect the water line from the vacuum valve
outlet fitting and connect it directly to the water supply line. This will pressure the line
and any leaks should cause dripping allowing location and repair of the leaks.
B. To test the operation of the vacuum valve:
(1) Reduce the control panel pressure to 40 psig.
(2) Adjust thumb wheel tension by turning it in a clockwise direction. There should be
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a visual difference in the output of the nozzles as more tension is applied to the
spring. Be sure not to press down on the thumb wheel while turning it.
(3) Release the thumb wheel tension and, once again, there should be a noticeable
change in the nozzle output.
C. The spring tension of the vacuum valve restricts the flow of water to the nozzles by
changing the required amount of vacuum needed to operate the vacuum valve. Since
the nozzles can only generate a fixed amount of vacuum (negative pressure) the flow
rate of water is reduced which causes a finer spray and less output. If there was a
vacuum leak in the water line it may not be noticeable with the vacuum valve spring
tension set to zero, but it should become noticeable with greater tension applied to the
spring. A good indication of a small leak would be very little visual difference in nozzle
output while performing this test.
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TROUBLESHOOTING
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1. TROUBLESHOOTING
Table 1. Troubleshooting
Symptoms
Part
Possible Failure
Solution
Vacuum Valve
Diaphragm Failure
Nozzle sputter.
Low output.
No output.
Replace defective
component.
Pilot Safety Regulator
Diaphragm Ripped
Nozzles sputter.
Air in water line.
Low output.
Repair regulator using
repair kit.
No Output.
Water drips from bonnet.
Valve Seat O-Ring
Pressure water line resulting
in heavy mist.
Replace o-ring, rebuilt
vacuum valve.
Could damage main
diaphragm.
No control of output.
Other O-rings
Vacuum leak, low output, no
output.
Replace.
Water leaks out.
Cracked Housing
Blockage
Vacuum leak or water dripping Replace damaged
from valve.
component.
Reduced output.
No output.
Clean.
Pilot Air
Regulator
Damaged Diaphragm
Loss in air pressure.
No air pressure.
Repair.
Uncontrolled air pressure.
Stuck Closed Or Open
Damaged Diaphragm
Unable to adjust pressure.
Disassemble and clean.
Repair.
Pilot Water
Regulator
Loss in water pressure.
No water pressure.
Uncontrolled water pressure.
Stuck Closed Or Open
Unable to adjust pressure.
Disassemble and clean.
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Solenoid Valve
Burnt Coil
Valve does not activate.
Replace.
Blocked
No pressure leaving the valve. Clean.
Stuck Closed Or Open
Dirty plunger.
Clean and install
external filters.
Timer
Wrong Timer Settings
Burnt Timer
System will not come on.
Reduce the off cycle.
System only stays on for a few Increase the on cycle.
seconds.
The timer lights are not on.
Replace.
Burnt smell from inside the
control panel.
Panel
Regulators
Damaged Diaphragm
Loss in air pressure.
No air pressure.
Repair.
Uncontrolled air pressure.
AFE Nozzle
Stuck Cleaning Needle
Nozzle Drips
Nozzle does not clean itself.
Water on the floor.
Lubricate seal and shaft
of needle.
Replace damaged
o-ring on end of needle.
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SPARE PARTS
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1. SPARE PARTS
A. Typically some spare parts are ordered with an AIRFOG system. These parts and kits
are to be retained in some safe location in a workshop for immediate access. It is
recommended that spare parts and repair kits be replaced as soon as they are
consumed.
B. Some NORTEC AIRFOG humidification system owners choose to not maintain in-house
spares or repair kits as there is sufficient redundancy built into the original design to
remain fully operational even if a few nozzles have to be shut down (disconnecting the
air pressure tube or removal and capping off the water and air delivery nozzle tubes).
The lead time to obtain replacement parts or repair kits is considered an acceptable risk.
Other owners decide that this risk is too high and choose to maintain spare parts and
repair kits in-house so that rapid repairs can be made.
Table 1. Rebuild Kits and General Parts
Part #
Description
1603115
1603117
1603118
1603119
1603120
1603122
1609503
1603116
Repair kit for Watts pilot water regulator (1603114 / 1603004)
Repair kit for Watts pilot water regulator (1609412 & 1603112)
Repair kit for Norgren panel mounted air regulator (1603001)
Repair kit for Norgren brass water pressure regulator (1603002)
Repair kit for AFE Nozzles (1609209, MINI, Octo)
Diaphragm repair kit for vacuum valve (1609000)
Filter for Air Pressure Control Section (1609401)
Repair Kit for 1603104 Regulator
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Figure 1. Octo Exploded View
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Table 2. Octo Spare Parts
OCTO
OCTO
PLUS
Modulation
OCTO PLUS
Item
Part #
Description
4
6
8
4
6
8
4
6
8
1608000 Octo Vacuum Valve (See
1
1
1
1
1
1
1
1
1
1
2
3
Exploded View)
1609209 AFE Nozzle (See Exploded View)
4
0
6
0
8
0
4
1
6
1
8
1
4
1
6
1
8
1
1603064 3-Way Solenoid Valve 24 VAC
Replacement Kit
4
5
1603020 On/Off Switch Assembly
1603021 Pilot Lamp Assembly
1603001 Air Regulator Panel Mount
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
6
7
8
1603118 Repair Kit for 1603001 Air
Regulator
1603050 Repeat Cycle Timer
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1603112 Watts Pilot Air Regulator
1603117 Repair Kit for Watts Pilot Air
Regulator 1603112
Not
Shown
1506260 E/P Converter
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
Not
Shown
1603081 Pressure Sensor
* Italics denote replacement for complete part, repair kits exist for these parts.
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Figure 2. AFE Nozzle Exploded View
Table 3. AFE Nozzle Spare Parts
DESCRIPTION
AFE Nozzle Repair Kit
O-Ring Seal
ITEM #
1
PART #
QTY
1603120
1a
1b
1c
1d
1e
1f
2
2
2
1
1
4
1
1
Flat Washer
Retaining Clip SST
O-Ring Valve Seat
Piston Seal
Rod Seal
2
1604040
1604039
Cleaning Needle
Piston
3
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Figure 3. Vacuum Valve Exploded View
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Table 4. Vacuum Valve Spare Parts
DESCRIPTION
ITEM #
1
PART #
OCTO
MINI STANDARD
1603122
Vacuum Valve Repair Kit
Washer Self Sealing
1
1
2
2
1
2
1
1
1
1
1
1
1
1
2
2
1
2
1
1
1
1
1
1
1
1a
1b
1c
1d
1e
2
2
1
2
1
1
1
1
1
1
1
Polypropylene Disc
Diaphragm 1/16 Neoprene
O-Ring Body Valve #118
O-Ring
1603002
1603119
1603114
1603008
1603004
1603110
Panel Mount Water Reg. 1/4” P
Repair Kit for 1603002 Water Regulator
Panel Mount Water Reg. 1/4” P SST for DI
Pressure Gauge 1-1/2” 1/8 CB 0-30
Pilot Water Regulator
2
3
Pilot Water Regulator SST for DI
(used in 1603114)
4
1603116
Repair Kit for 1603004, 1603114, and
1603110 Pilot Water Regulator
1
1
1
* Italics denote replacement for complete part, repair kits exist for these parts.
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Figure 4. Control Panel Exploded View
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Table 5. Control Panel Spare Parts
QTY
ITEM #
1
PART #
DESCRIPTION
MINI I/II
AFE
1600027 Valve 4-way 24 Vac Solenoid
0
1
Pressure Switch, Screw-on (Modulating Contol
Panel Only)
2
3
1603081
1506260
0
0
1
1
E/P Converter Module (Modulating Control
Panel Only)
4
5
6
7
8
9
1603050 Repeat Cycle Timer
1
1
1
1
1
0
1
1
1
1
1
1
1
1
1603200 Pressure Gauge Panel MTG Bars
1493096 Lamp Green Indicator
1453001 Switch On/Off
1603023 Lamp Amber Indicator
1603064 Valve 3-way 24 Vac Solenoid Replacement Kit
1603001 Air Regulator Panel Mount
1603118 Repair Kit for 1603001 Air Regulator
1853104 Lock c/w 2 keys
10
11
1
1
* Italics denote replacement for complete part, repair kits exist for these parts.
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WARRANTY
(1) WALTER MEIER INC. and/or WALTER MEIER LTD. (hereinafter collectively referred
to as THE COMPANY), warrant for a period of two years after installation or 30 months
from manufacturer’s ship date, whichever date is earlier, that THE COMPANY’s
manufactured and assembled products, not otherwise expressly warranted (with the
exception of the cylinder), are free from defects in material and workmanship. No
warranty is made against corrosion, deterioration, or suitability of substituted materials
used as a result of compliance with government regulations.
(2) THE COMPANY’s obligations and liabilities under this warranty are limited to furnishing
replacement parts to the customer, F.O.B. THE COMPANY’s factory, providing the
defective part(s) is returned freight prepaid by the customer. Parts used for repairs are
warranted for the balance of the term of the warranty on the original humidifier or
90 days, whichever is longer.
(3) The warranties set forth herein are in lieu of all other warranties expressed or implied
by law. No liability whatsoever shall be attached to THE COMPANY until said products
have been paid for in full and then said liability shall be limited to the original purchase
price for the product. Any further warranty must be in writing, signed by an officer of
THE COMPANY.
(4) THE COMPANY’s limited warranty on accessories, not of the companies manufacture,
such as controls, humidistats, pumps, etc. is limited to the warranty of the original
equipment manufacturer from date of original shipment of humidifier.
(5) THE COMPANY makes no warranty and assumes no liability unless the equipment is
installed in strict accordance with a copy of the catalog and installation manual in effect
at the date of purchase and by a contractor approved by THE COMPANY to install
such equipment.
(6) THE COMPANY makes no warranty and assumes no liability whatsoever for
consequential damage or damage resulting directly from misapplication, incorrect
sizing or lack of proper maintenance of the equipment.
(7) THE COMPANY retains the right to change the design, specification and performance
criteria of its products without notice or obligation.
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U.S.A.
CANADA
Authorized Agent:
Walter Meier (Climate USA) Inc.
Walter Meier (Climate Canada) Ltd.
826 Proctor Avenue
Ogdensburg, NY 13669
TEL: 1-866-NORTEC-1
2740 Fenton Road
Ottawa, ON K1T 3T7
TEL: 1-866-NORTEC-1
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