Nortec Industries Airfog Series User's Manual
Contents
1. 10 Figure 3 Water and Air Line Pressure 12 Figure 4 Nozzle to Bracket 12 Figure 5 AFE Nozzle Ceiling 12 Figure 6 Quick Release Fitting 13 Figure 7 Saddle TTL 13 Figure 8 Vacuum Valve Operation 16 Figure 9 Vacuum Valve Interfaces 16 Figure 10 Pilot Al Hegulaldor a be Rar 130 iah ER ERE 16 Figure 11 Pilot Air Regulator 1 5 16 Figure 12 Primary Air Pressure Control 5 18 Figure 13 Primary Water Pressure Control Section 18 Figure 14 Control Panel eier 18 Figure 15 Control Panel terminal Strip 18 Figure 16 Schematic Plumbing 19 10 20 MINI amp OCTO INSTALLATION Figure 1 Mini Installations tute cn se ee rara 23 Figure 2 Plumbing End Gannaclions ues 00 02 hae porcus re net 23 Figure 3 Octo Layout with 25 Figure 4 Oc2. A AIRFOG DEFINITION B NORTEC AIRFOG FAMILY OF PRODUCTS C AFE PRINCIPLE OF OPERATION 2 GENERAL AIRFOG TECHNICAL CONSIDERATIONS A ADIABATIC COOLING B HUMIDIFICATION ZONES IN SPACE APPLICATIONS C ABSORPTION DISTANCE D COMPRESSED OLDER NORTEC AIRFOG SYSTEM COMPONENTS F INSTALLATION TOOLS AND EQUIPMENT G PARIS e had a P E 10 10 INSTALLATION 1 INSTALLATION NOZZLE SYSTEM LAYOUT 2 ZONES A INTRODUCTION B SUPPLY FEED LINES CLEANING eee eee ees D MOUNTING OF NOZZLES nenn E CONNECTING NOZZLES SADDLE CLAMP INSTALLATION G VACUUM VALVE cx sae H PILOT OPERATED AIR REGULATOR l PRIMARY AIR PRESSURE CONTROL J PRIMARY WATER PRESSURE CONTROL K CONTROL PANEL L ELECTRICAL WIRING M PILOT LINES edo 10 20 MINI amp OCTO INSTALLATION 1 SELF CONTAINED AIRFOG SYSTEMS AFE MINI SYSTEMS AFE OCTO
3. 52 Control Panel Spare Pars vicc a eat 54 A Nortec www humidity com THIS PAGE INTENTIONALLY LEFT BLANK 2008 04 11 Nortec www numidity com 10 00 INTRODUCTION 2008 04 11 A Nortec www humidity com 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 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 2 4 The AirFog family is Nortec most advanced adiabatic humidifiers There are groups of products that fall in this family applied products and packaged products The applied products group describes systems that are tailored specifically for each application Two products fall und
4. 5 INSTALLATION PROCEDURE 10 30 START UP PROCEDURE 1 moom mp AFE MINI AND OCTO START UP PROCEDURES INTRODUCTION RR III COMPRESSED AIR SUPPLY WATER 50 SELF CLEANING CYCLE ADJUSTMENT SETTING THE SYSTEM FOR NORMAL OPERATION A Nortec www humidity com 2008 04 11 A Nortec www humidity com 10 40 SHUT DOWN PROCEDURE 1 AFE MINI AND OCTO SHUT DOWN PROCEDURES 36 10 50 MAINTENANCE 38 MAINTENANCE ar PRODR caer pas Sneed 1 SEASONAL MAINTENANCE 38 2 38 EN P SEASONAL STARTUP upaya kay 3 39 UNSCHEDULED MAINTENANCE 4 39 aq Re Ford a saa 2 0224 VACUUM VALVE TESTING 5 39 CHECKING FOR VACUUM 6 TROUBLESHOOTING 10 60 1 1 oie sde a re TE bed rb pe IR us 42 10 70 SPARE PARTS 1 SPARE PARIS 3325561 ue ne ori PEN ESAE 46 WARRANTY 2008 04 11 www humidity com LIST OF FIGURES Figure Page 10 10 INSTALLATION PROCEDURES Figure 1 Typical Nozzle Layout for Wall Mounted System 9 Figure 2 Multi Zone
5. 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 Tor 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 A Nortec www humidity com 3 Ifthe 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 SETTING THE SYSTEM FOR NORMAL OPERATION 1 Once the start up and a
6. ITEM PART DESCRIPTION QTY 1 1603120 AFE Nozzle Repair Kit 1a O Ring Seal 2 1b Flat Washer 2 1c Retaining Clip SST 2 1d O Ring Valve Seat 1 1e Piston Seal 1 1f Rod Seal 4 2 1604040 Cleaning Needle 1 3 1604039 Piston 1 10 70 Page 50 2008 04 11 A Nortec www humidity com 11 UMNA IUN UINNIBA 060 Figure 3 Vacuum Valve Exploded View 10 70 2008 04 11 Page 51 A Nortec www humidity com Table 4 Vacuum Valve Spare Parts PART DESCRIPTION OCTO MINI STANDARD 1 1603122 Vacuum Valve Repair Kit 1 1 1 1a Washer Self Sealing 2 2 2 1b Polypropylene Disc 2 2 2 1c Diaphragm 1 16 Neoprene 1 1 1 1d O Ring Body Valve 118 2 2 2 1e O Ring 1 1 1 1603002 Panel Mount Water Reg 1 4 P 1 1 1 2 1603119 Repair Kit for 1603002 Water Regulator 1 1 1 1603114 Panel Mount Water Reg 1 4 P SST for DI 1 1 1 3 1603008 Pressure Gauge 1 1 2 1 8 CB 0 30 1 1 1 1603004 Pilot Water Regulator 1 1 1 1603110 Pilot Water Regulator SST for DI 1 1 1 4 used in 1603114 1603116 Repair Kit for 1603004 1603114 and 1 1 1 1603110 Pilot Water Regulator Italics denote replacement for complete part repair kits exist for these parts 10 70 Page 52 2008 04 11 A Nortec www humidity com Figure 4 Control Panel Exploded View 10 70 Page 53 2008 04 11 A Nortec www humidity com Table 5 Control Pane
7. 2008 04 11 A Nortec www humidity com 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 Repair kit for Watts pilot water regulator 1603114 1603004 1603117 Repair kit for Watts pilot water regulator 1609412 amp 1603112 1603118 Repair kit for Norgren panel mounted air regulator 1603001 1603119 Repair kit for Norgren brass water pressure regulator 1603002 1603120 Repair kit for AFE Nozzles 1609209 MINI Octo 1603122 Diaphragm repair kit for vacuum valve 1609000 1609503 Filter for Air Pressure Control Section 1609401 1603116 Repair Kit for 16031
8. Nortec humidity com n AIRFOG Series Atomizing Humidifier Installation Manual 2008 04 11 1502247 C A Nortec www humidity com 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 ISO 9001 2000 REGISTERED Certificate No 002419 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 Revision Date Put Revision Revision Date Put Number Date In Manual By Number Date In Manual By 2008 04 11 TABLE OF CONTENTS Subject 10 00 INTRODUCTION 1 INTRODUCTION
9. OCTO INSTALLATION 2008 04 11 A Nortec www humidity com 1 AFE SELF CONTAINED AIRFOG SYSTEMS A AFE MINI SYSTEMS 1 2 AFE MINI systems are self contained packaged systems that include all necessary components 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 Support anchors f 1 4 lag bolts g 120 VAC standard electrical receptacle h Humidity control device Humidistat 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 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 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 mar
10. 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 10 10 Page 14 2008 04 11 A Nortec www humidity com 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 10 10 Page 15 2008 04 11 Air Compressor Compressed air exits the nozzles creating a vacuum on the water side The negative pressure pulls ihe VV diaphragm down opening the water valve Alr Compressor As the pressurised water enters the VV chamber H pushes up on the diaphram closing the water valve During normal operation the vacuum valve will cycle between the open and closed state Water Figure 8 Vacuum Valve Ope
11. and that all local building codes are followed In general a Each Octo weighs up to 64 16 29 kg b Install the four 3 8 NC eye bolts into the four mounting holes on the unit using the supplied lock washers amp 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 10 20 Page 24 2008 04 11 A Nortec www humidity com 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 1 2 plastic tubing If soft copper pipe is to be used replace the plastic sleeve in the fitting with the supplied brass sleeve 6 standard Octo unit a separate control panel and 1 4 O D plastic tubing for pilot line is required To install this line t
12. specification and performance criteria of its products without notice or obligation A Nortec www humidity com ISO 9001 2000 walter CH Meler 0 UL US LISTED Li Certificate No 002419 U S A CANADA Authorized Agent Walter Meier Climate USA Inc Walter Meier Climate Canada Ltd 826 Proctor Avenue 2740 Fenton Road Ogdensburg NY 13669 Ottawa ON K1T 3T7 TEL 1 866 NORTEC 1 TEL 1 866 NORTEC 1 EMAIL northamerica climate waltermeier com FAX 613 822 7964 WEBSITE www humidity com
13. 20 Page 26 2008 04 11 A Nortec www humidity com Typical Installation Layout WAVAVAVWAV 24Vac Control Power k Primary Water And Air Lines 18 ga Wire Clearance c w Optional Primary Pressure Controls Use Flexable Plastic Or Copper Lines To Connect To The Unit Figure 5 Ceiling Mounting of Octo must For copper tubing Ge by ann Oe replace plastic sleeve 3mm Pias c Tube Locking Nut Bulkhead Union on plumbing side Pilot in connection 1 47 quick connect Figure 6 Octo Air and Water Interfaces 10 20 Page 27 2008 04 11 A Nortec www humidity com v Tube Must Exceed End Of Sleeve For Copper Tubing By a Min Of 0 125 3 mm Figure 7 Four Octo Units with a Single Control Panel 15 4 5 m 1219 2 mm Spray Pattern From AFE Nozzie Figure 8 AFE Octo Nozzle Spray Pattern 10 20 Page 28 2008 04 11 6 10 30 START UP PROCEDURE 2008 04 11 A Nortec www humidity com 1 AFE MINI AND OCTO START UP PROCEDURES INTRODUCTION A 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 All supply and feed lines have been cleaned The on off valve of the primary water pressure control section is OFF o Water at 25 psig pressure from the main supply is ON The on
14. 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 Cut away View of Quick Disconnect Fitting Locking Ring a 1 4 Tubing Locking Fingers O Ring Seal NPT Threads 1 4 Tubing pene EI Tubing MUST be cut PERPENDICULAR to ensure proper seal Use sharp knife not wire cutters or pliers Figure 6 Quick Release Fitting Figure 7 Saddle Clamp 10 10 Page 13 2008 04 11 A Nortec www humidity com 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 si
15. 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 amp 7 are for power voltage 24 VAC A wiring diagram is provided with each control panel Both control panels reserve terminals 1 amp 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 amp 5 on the 7 terminal block strip as 10 10 Page 17 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 2008 04 11 A Nortec www humidity com 1 2 FNPT 1 4 Tum Shut Off Valve 2 NPT Brass Union Figure 12 Primary Air Pressure Control
16. 04 Regulator 10 70 Page 46 2008 04 11 A Nortec www humidity com o o o o o o o o o o o o o o 00000000 00000000 8g5pm 8 8 Figure 1 Octo Exploded View 10 70 Page 47 2008 04 11 Table 2 Octo Spare Parts A Nortec www humidity com OCTO Lui OCTO OCTO PLUS PLUS Item Part Description Modulation 4 6 4 611846 8 1 1608000 Octo Vacuum Valve See 1 1 1 1 1 1 1 1 Exploded View 2 1609209 AFE Nozzle See Exploded View 4 6 4 68 4 61 8 3 1603064 3 Way Solenoid Valve 24 VAC 0 0 1 1 1 1 151 Replacement Kit 4 1603020 On Off Switch Assembly 0 0 1 1 1 1 1 1 5 1603021 Pilot Lamp Assembly 0 0 1 1 1 1 111 1603001 Air Regulator Panel Mount 0 0 1 1 1 1 1 1 1603118 Repair Kit for 1603001 Air 0 0 1 1 1 1 151 Regulator 7 1603050 Repeat Cycle Timer 0 0 1 1 1 1 1 1 1603112 Watts Pilot Air Regulator 0 0 1 1 1 1 111 5 1603117 Repair Kit for Watts Pilot Air 0 0 1 1 1 1 111 Regulator 1603112 Not 1506260 E P Converter 0 0 0 0 1 111 Shown Not 1603081 Pressure Sensor 0 0 0 0 IOJ 1 111 Shown Italics denote replacement for complete part repair kits exist for these parts 10 70 Page 48 2008 04 11 A Nortec www humidity com THIS PAGE INTENTIONALLY LEFT BLANK 10 70 Page 49 2008 04 11 A Nortec www humidity com Figure 2 AFE Nozzle Exploded View Table 3 AFE Nozzle Spare Parts
17. Figure 13 Primary Water Pressure Control Section Section Pilot Inlet 24 VAC Modulation On Off Input Controls Figure 14 Control Panel Figure 15 Control Panel Terminal Strip Interfaces 10 10 Page 18 2008 04 11 A Nortec www humidity com 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 connector Single Zone Configuration Vacuum Valve Never install below Primary Water Pressure Control 166 and wat feed lines Primary Air Pressure Contro Q Pilot Air Regulator Bal Valve Water Side Pitt Line Figure 16 Schematic Plumbing Layout 10 10 Page 19 2008 04 11 A Nortec www humidity com THIS PAGE INTENTIONALLY LEFT BLANK 10 10 Page 20 2008 04 11 6 10 20 MINI amp
18. Regulator Ball Valve Nozzle Ball Valve Water Side Pilot Line Figure 2 Multi Zone Layout 10 10 Page 10 2008 04 11 A Nortec www humidity com 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 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 loc
19. al 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 10 10 Page 11 2008 04 11 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 vert
20. d 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 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 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 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 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 THE COMPANY retains the right to change the design
21. d the leak If an AFE nozzle is sucking some air rather than 10096 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 WATER SUPPLY 1 2 The clean out valves on the ends of the water supply pipes must be closed 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 10 30 Page 30 2008 04 11 A Nortec 3 lt www humidity com Adjust the water regulator valve in the primary water pressure control section until the gauge reads 25 psig The pressure regulator on the vacuum valve should be adjusted to read between 5 and 7 psig Manually depressing the thumb screw on top of the vacuum valve will permit water to flow into the pipes and fill them 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 Reducing the air pressure feed to the nozzles Refer to Figure 1 Capacity Output vs Vacuum Valve Adjustment and Figure 2 AFE Capacity Chart Water flow through the nozzles can be adjusted using the thumb wheel on the vacuum valve Turning the thumb wheel cloc
22. de 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 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 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 r
23. djustment 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 10 30 Page 32 2008 04 11 A Nortec www humidity com 5 2 5 0 2 5 e e o Applied Air Pressure PSIG Figure 1 Capacity Output vs Vacuum Valve Adjustment AFE Nozzle Output Capacity Output 206 8 2758 344 7 413 7 4827 551 6 Kpa Applied Air Pressure Figure 2 AFE Capacity Chart 10 30 Page 33 2008 04 11 Vacumm Valve Adustment Number of turns A Nortec www humidity com THIS PAGE INTENTIONALLY LEFT BLANK 10 30 Page 34 2008 04 11 6 10 40 SHUT DOWN PROCEDURE 2008 04 11 A Nortec www humidity com 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 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
24. een 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 The Octo interfaces are a 3 8 O D plastic or soft copper water supply line rated at a minimum pressure of 25 psig 1 2 O D plastic or soft copper air supply line rated at a minimum pressure of 90 psig 1 4 O D plastic tubing for command air pressure pilot air Isolation valves for both air and water lines Hanging hardware i Chains i 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 When using chains to suspend the Octo ensure the chains are rated for the units weight 64 Ibs
25. egulator 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 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 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
26. er this category HP HVAC uses high pressure water to create a very fine mist for spray into ducts and air handlers 0 AFE Nozzle systems use compressed subsonic air flows and water to create a fine mist that is sprayed directly into a space 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 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 10 00 Page 2 2008 04 11 A 2 Nortec www humidity com 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
27. g 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 10 50 Page 40 2008 04 11 Nortec www humidity com 10 60 TROUBLESHOOTING 2008 04 11 1 TROUBLESHOOTING A Nortec Table 1 Troubleshooting www humidity com Part Possible Failure Symptoms 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 No Output Water drips from bonnet Repair regulator using repair kit Valve Seat O Ring Pressure water line resulting in heavy mist Could damage main diaphragm No control of output Replace o ring rebuilt vacuum valve Other O rings Vacuum leak low output no output Water leaks out Replace Cracked Housing Vacuum leak or water dripping Replace da
28. ge compressor By using a multiple compressor design A Nortec www humidity com 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
29. hat 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 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 10 00 Page 3 2008 04 11 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 lar
30. he 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 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 10 20 Page 25 2008 04 11 A Nortec www humidity com Control Panel installation for standard Octo hardware is explained in the under Control Panel section 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 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 10
31. ical height differences to the vacuum valve The maximum nozzle installation height allowable above the water supply line is 12 30 cm Primary Air Pressure Control Section A Nortec www humidity com Wall Support Bracket Figure 3 Water and Air Line Pressure Figure 4 Nozzle to Bracket Interface Control Threaded Rod ff Supplied By Others Nozzle Support AFE Nozzle Bracket N d Y A Supply Lines E To Nozzles Se By Others Water Line 2 S Pipe Hanger Qe By Others Air Line Installation Hardware Package Includes Saddle Clamps Adapters And Tubing Figure 5 AFE Nozzle Ceiling Mounting 10 10 Page 12 2008 04 11 A Nortec www humidity com E CONNECTING NOZZLES 1 Allthe 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
32. ing 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 10 10 Page 8 2008 04 11 A Nortec www humidity com Vacuum Valve Pilot Water Regulator Primary Water for AFE System Pressure Control Section Optional Pilot Operated Air Regulator E Main Water 1 2 Copper Piping Type L or Rigid Plastic Piping 1 others f Air by Se Pressure Control Section Optional 1 4 Polytube Control Lines Main Air Humidistat Supplied by NORTEC Typical nozzle layout for wall mounted system Figure 1 Typical Nozzle Layout for Wall Mounted System 10 10 Page 9 2008 04 11 D A n N H ai y A 29 d p Main Air Supply D 8 XE E E E T 0 29 XXX T ei 29 1 Ge li i A Nortec www humidity com 0 ad X Hi E ER xx LA Pilot regulator usedto boost pilot control signal to the four zones Ne Tap off main supply Air line use min 3 8 LD copper or plastic line Primary Water Pressure Control Vacuum Valve Primary Air Pressure Control 2 Pilot Air
33. k 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 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 10 20 Page 22 2008 04 11 A Nortec www humidity com 3 ft 1 m minimum 15 ft 4 5 m clearance each nozzie 6 ft 1 8 m minimum Optional air Optional water primary pressure primary pressure regulator set to 75 psig regulator e set to 25 psig Clean out plugs Water feed 3 8 tube compression fitting for plastic tubing Air Feed 1 4 quick disconnect fitting 8 transformer for plastic tubing Figure 1 Mini Installations 10 20 Page 23 2008 04 11 Figure 2 Plumbing End Connections A Nortec www humidity com B AFE OCTO SYSTEMS 1 2 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 betw
34. 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 10 50 Page 38 2008 04 11 A Nortec www hu
35. kwise 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 10 30 Page 31 2008 04 11 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 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
36. l Spare Parts QTY PART DESCRIPTION MINI 1 11 AFE 1 1600027 Valve 4 way 24 Vac Solenoid 0 1 2 1603081 on Screw on Modulating Contol 0 1 3 1506260 Module Modulating Control 0 1 4 1603050 Repeat Cycle Timer 1 1 5 1603200 Pressure Gauge Panel MTG Bars 1 1 6 1493096 Lamp Green Indicator 1 1 7 1453001 Switch On Off 1 1 8 1603023 Lamp Amber Indicator 1 1 9 1603064 Valve 3 way 24 Vac Solenoid Replacement Kit 0 1 1603001 Air Regulator Panel Mount 1 1 1603118 Repair Kit for 1603001 Air Regulator 11 1853104 Lock c w 2 keys 1 1 Italics denote replacement for complete part repair kits exist for these parts 10 70 Page 54 2008 04 11 A Nortec www humidity com THIS PAGE INTENTIONALLY LEFT BLANK 10 70 Page 55 2008 04 11 A Nortec www humidity com WARRANTY 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 THE COMPANY s obligations an
37. maged from valve component Blockage Reduced output Clean No output Pilot Air Damaged Diaphragm Loss in air pressure Repair 08 No air pressure Uncontrolled air pressure Stuck Closed Or Open Unable to adjust pressure Disassemble and clean Pilot Water Damaged Diaphragm Loss in water pressure Repair Regulator No water pressure Uncontrolled water pressure Stuck Closed Or Open Unable to adjust pressure Disassemble and clean 10 60 Page 42 2008 04 11 A Nortec www humidity com 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 System will not come on Reduce the off cycle System only stays on for a few Increase the on cycle seconds Burnt Timer The timer lights are not on Replace Burnt smell from inside the control panel Panel Damaged Diaphragm Loss in air pressure Repair No air pressure Uncontrolled air pressure AFE Nozzle Stuck Cleaning Needle Nozzle does not clean itself Lubricate seal and shaft of needle Nozzle Drips Water on the floor Replace damaged o ring on end of needle 10 60 Page 43 2008 04 11 A Nortec www humidity com THIS PAGE INTENTIONALLY LEFT BLANK 10 60 Page 44 2008 04 11 Nortec www numidity com 10 70 SPARE PARTS
38. midity com 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 t
39. 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 control panel switch is OFF h The 24 transformer is plugged into 110 VAC source and the control panel power indicator light is illuminating il The humidistat is set at 100 relative humidity B COMPRESSED AIR SUPPLY C 1 2 The clean out valves on the ends of the supply pipes must be closed 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 The control panel switch is turned to the ON position 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 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 The air pressure regulator knob in the primary air pressure control section is to be adjusted until its gauge indicates 90 psig 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 aroun
40. ontrol 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 10 40 Page 36 2008 04 11 Nortec www numidity com 10 50 MAINTENANCE 2008 04 11 A Nortec www humidity com 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 Ill 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
41. ration Outlet Port Pilot Operated d Air Regulator Pilot Line from Control Panel Figure 10 Pilot Air Regulator A Nortec www humidity com Wall Bracket With 1 4 Mounting Holes Fine Adjustment Knob Connection 1 4 O D Tube Figure 9 Vacuum Valve Interfaces Feed Lineto Nozzles Figure 11 Pilot Air Regulator Installation 10 10 Page 16 2008 04 11 A Nortec www humidity com 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 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 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 ELECTRICAL WIRING 1 Electrical connections of the control panel use 18 ga wire for all external wiring The control panel requires 24 VAC
42. 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 2 The movement of humidity through a space is very rapid In applications where accurate humidity control is essential it is important t
43. 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 5 Turn off the air supply valve on the primary air pressure control system 6 7 Turn the air compressor off Disconnect the 24 VAC transformer from the 110 VAC supply Turn the system off at the control panel 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 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 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 c
44. t Spray Patteri si 25 Figure 5 Ceiling Mounting Of 27 Figure 6 Octo Air and Water 27 Figure 7 Four Octo Units with a Single Control 28 Figure 8 AFE Octo Nozzle Spray 28 10 30 START UP PROCEDURE Figure 1 Capacity Output va Vacuum Valve Adjustment 33 Figure 2 AFE Capacity CIT s iir Sex engeren daran 33 10 70 SPARE PARTS Figure 1 Octo Exploded View gt epe e 47 Figure 2 AFE Nozzle Exploded 50 Figure 3 Vacuum Valve Exploded View 51 Figure 4 Control Panel Exploded 53 A Nortec 2008 04 11 Y Nortec Table 10 60 TROUBLESHOOTING Table 1 10 70 SPARE PARTS Table 1 Table 2 Table 3 Table 4 Table 5 2008 04 11 www humidity com LIST OF TABLES Page 110001651100111 idu esu me paqu ea dit 42 Rebuild Kits and General 46 Octo Spare PTS sacs acis A A RR C Repas QS 48 AFE Nozzle Spare lt 50 Vacuum Valve Spare
45. 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 Cutand join copper stainless steel or plastic pipe using standard plumbing joining techniques Connect low voltage wiring to the control panel Connect plastic tubing D 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 10 00 Page 4 2008 04 11 A Nortec www humidity com 10 00 Page 5 2008 04 11 c suppliers Nails screws bolts threaded rods anchors rivets etc
46. to attach mounting brackets to the structure The fasteners used will depend on the material used in the mounting surface 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 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 A Nortec www humidity com THIS PAGE INTENTIONALLY LEFT BLANK 10 00 Page 6 2008 04 11 Nortec www numidity com 10 10 INSTALLATION 2008 04 11 A Nortec www humidity com 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 ceil
47. urned 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 10 50 Page 39 2008 04 11 A Nortec www humidity com 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 The sprin
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