SCA1000 SCA1000X SCA2000 SCA2000X

Transcription

1 MODELS: SCA1000 SCA1000X SCA2000 SCA2000X

2 Notice This document contains information protected by copyright. All rights are reserved. The owner of the equipment for which this manual is written may photocopy the contents of this manual for internal use only. No part of this document may be photocopied, reproduced, or translated into another language for use by anyone other than the owner of the equipment for which this manual is written without the prior written consent of Stulz Air Technology Systems, Inc. (SATS). This document contains confidential and proprietary information of Stulz Distributing or photocopying this document for external distribution is in direct violation of U.S. copyright laws and is strictly prohibited without the express written consent of SATS. Unpublished rights reserved under the copyright laws of the United States and of other countries. Other brands and tradenames are trademarks of their respective owners. Copyright 2007 by Stulz Printed in the United States of America. All rights reserved. Stulz 1572 Tilco Drive Frederick, MD USA 01/08

3 TABLE OF CONTENTS 1.0 Introduction General Safety General Safety Summary Product Warranty Specifications General Design Main Parts Parts Illustrations Installation Receiving the Equipment Site Preparation Installation of Humidifier Mist Outlet Elbow and Guide Tube Supply and Overflow Piping Main Power/Control Wiring Humidistat Operation Initial Operation Checklist Purge the Water Line Procedure for Operation Long Term Shutdown Water Supply Solenoid Valve Printed Circuit Board Product Support Group Technical Support Obtaining Warranty Parts Obtaining Spare/Replacement Parts Drawings Layout Drawing of Humidifier Electrical Circuit Diagrams SCA1000/ SCA1000X/2000X List of Figures Figure 1- External Parts Figure 2- Internal Parts Figure 3- Installation Diagram Figure 4- Compression Fitting Maintenance/Repairs Periodic General Maintenance General Maintenance Table Air Filter Fuses Water Tank Interior and Electrical Parts Troubleshooting and Repair Common Repairs/Parts Replacement Preparation For Repairs Re-assembing Replacing Transducer and Nebulizer Print Plate Replacing Float Switches i

4 ii

5 1.0 INTRODUCTION 1.1 General Recognized as a world leader, Stulz Air Technology Systems, Inc. (SATS) ultrasonic humidifiers are designed and manufactured with the highest quality craftsmanship using the finest materials available in the industry. Your ultrasonic humidification system will provide years of trouble free service if installed and maintained in accordance with this manual. Damage to the unit from improper installation, operation or maintenance is not covered by the warranty. This manual contains information for installation, operation, maintenance, troubleshooting and repair. STUDY the instructions contained in this manual. They must be followed to avoid difficulties. Spare parts are available from SATS to insure continuous operation. Using substitute parts or bypassing electrical components in order to continue operation is not recommended and will VOID THE WARRANTY. Due to technological advancements, components are subject to change without notice. SATS SCA Series Ultrasonic Humidifiers are designed for localized area humidification applications such as a small room, display case, chamber or a process site. Any use beyond this is deemed to be not intended. SATS is not liable for any damage resulting from improper use. The system is designed to be installed indoors unless otherwise noted on the equipment nameplate. 1.2 Safety General Stulz uses NOTES along with and WARNING symbols throughout this manual to draw your attention to important operational and safety information. A bold text NOTE marks a short message in the information to alert you to an important detail. A bold text safety alert appears with information that is important for protecting your equipment and performance. Be especially careful to read and follow all cautions that apply to your application. A bold text WARNING safety alert appears with information that is important for protecting you from harm and the equipment from damage. Pay very close attention to all warnings that apply to your application. A safety alert symbol accompanies a general WARNING or safety statement. A safety alert symbol accompanies an electrical shock hazard WARNING or safety statement Safety Summary The following statements are general guidelines followed by warnings and cautions applicable throughout the manual. Prior to performing any installation, operation, maintenance or troubleshooting procedure read and understand all instructions, recommendations and guidelines contained within this manual. WARNING High voltage is used in the operation of this equipment. Death on contact may result if personnel fail to observe safety precautions. This unit must be installed according to local and national electric codes. All maintenance and/or repairs must be performed by a qualified technician. All personnel working on or near equipment should be familiar with hazards associated with electrical maintenance. Always turn off the main power before beginning work on the equipment. NOTE Wiring terminations may become loose during transit of the equipment therefore; verify all wiring terminations are secure prior to operation. NOTE Do not attempt to make repairs without the proper tools. 1-1

6 NOTE SATS offers no warranty protection on humidifcation systems using controls that are not provided by SATS. It is essential that De-ionized (DI) or Reverse Osmosis (RO) water be used as the supply water source to maintain full warranty coverage. The use of untreated water will VOID THE WARRANTY. Use only non-corrosive stainless steel or poly tubing rated for use with DI water to supply the humidifier. Never block the mist outlet or the opening of the air inlet. The humidifier may be filled with the condensed mist and electrical shorts may result. Never attempt to remove the mist guide cover and/or the mist blow tubes while the humidifier is operating, or electric shorts may result. If there is a risk of supply water freezing, pipe insulation should be provided. Observe the unit for water leakage. A short circuit could occur if the humidifier is splashed with water while it is operating. Never apply power when the humidifier is overturned or upside down. Damage to the ultrasonic nebulizer unit or transducer may result. Never drop the humidifier or apply hard shock to it. It may damage internal parts. Drain the water in the tank for sanitary reasons when humidifier is turned is off for more than 3 days. Prevent fingers or foreign materials from entering fan. SCA2000 With Distribution Ducting 1-2

7 1.3 Product Warranty SATS offers a standard two year limited warranty as stated below. 2-Year Standard Limited Warranty: Stulz, warrants to the original buyer of its products that the goods are free from defects in material and workmanship. Stulz s obligation under this warranty is to repair or replace, at its option, free of charge to the customer, any part or parts which are determined by Stulz Air Technology Systems Inc. to be defective for a period of 24 months from date of shipment when a completed start-up form has been submitted to Stulz within 90 days from shipment. In the event that a completed start-up form is not received by Stulz within 90 days from shipment, the company s obligation will be for a period of 12 months from date of shipment. Parts repaired or replaced under this warranty are shipped FOB Factory, and warranted for the balance of the original warranty period or for 90 days from the date of installation, whichever is greater. Stulz s warranty does not cover failures caused by improper installation, abuse, misuse, misapplication, improper or lack of maintenance, negligence, accident, normal deterioration (including wear and tear), or the use of improper parts or improper repair. Purchaser s remedies are limited to replacement or repair of non-conforming materials in accordance with the written warranty. This warranty does not include costs for transportation, costs for removal or reinstallation of equipment or labor for repairs or replacement made in the field. If any sample was shown to the buyer, such sample was used merely to illustrate the general type and quality of the product, and not to represent that the equipment would necessarily conform to the sample. This is the only warranty given by the seller, and such warranty is only given to buyers for commercial or industrial purposes. This warranty is not enforceable until the invoice(s) is paid in full. THE FOREGOING SHALL CONSTITUTE SATS S ENTIRE LIABILITY AND YOUR EXCLUSIVE REMEDY. IN NO EVENT SHALL SATS BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES, INCLUDING LOST PROFITS (EVEN IF ADVISED OF THE POSSIBILITY THEREOF) ARISING IN ANY WAY OUT OF THE INSTALLATION, USE OR MAINTENANCE OF THE EQUIPMENT. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Conditions For Maintaining Warranty Coverage: 1) De-ionized (DI) or Reverse Osmosis (RO) water is used as the supply water for the humidifier. 2) SATS provided controls are used with the humidification system. 3) Input voltage to the humidifier does not exceed 51VAC. 1-3

8 1.4 Specifications Electrical Characteristics Power source Allowable voltage range Insulation resistance Dielectric voltage withstand Single-phase 48VAC; 50/60Hz Within ±10% on primary side of transformer; 51VAC (max.) on secondary side. 100 M.Ohms or more (excluding solid-state components). Operational when 1500VAC is applied for 1 minute (excluding solid-state components) Operating Conditions Ambient working conditions 34 to 122 F; 90%RH or less. Water supply quality DI or RO water. Water conductance < 20 microsiemens purity. Water supply pressure 30 to 75 psi Water supply temperature 40 F to 104 F (Note) 1) Calcium, magnesium or other agents that may be contained in the supply water are atomized into the air together with the mist and may form white powders after the water has evaporated. To avoid this, always use DI or RO supply water. 2) The nebulizing capacity of the transducer in the ultrasonic nebulizer unit decreases gradually with use. It should usually be exchanged after about 10,000 to 15,000 hours of operation, (depending on water quality and suitable voltage), although the unit may continue to run as long as it s effective capacity meets the particular requirements. 3) To ensure full warranty coverage, the input voltage to the humidifier must not exceed 51VAC. If the voltage on the secondary side of the transformer exceeds 51VAC, damage to the transducers and print plates will result. 1.5 General Design The SCA Ultrasonic humidifier directly atomizes water producing a fine mist and is equipped with a fan to deliver the mist into a space to be conditioned. With models SCA1000 & SCA2000 it is possible to adjust the atomization to maintain space conditions by changing the air volume. For fine tuning, models SCA1000X & SCA2000X include a potentiometer which may be used to adjust the amount of mist produced by the humidifier. A complete system consists of the humidifier to produce mist and a transformer (optionally provided by SATS), to supply power to the humidifier. The humidifier incorporates ultrasonic nebulizer unit(s) to produce ultrasonic waves, a fan to send out the mist and an automatic water supply mechanism to maintain the supply water at a constant level. When conducting routine maintenance, it is important to clean the air filter and water tank because it significantly affects the humidifying capacity and life of the ultrasonic nebulizers Main Parts The main parts of the humidifier are described below. See Figures 1 and 2 on the following pages for the location of the parts Ultrasonic Nebulizer Unit Modular sub-assembly incorporating a plate with amplifying circuitry and a transducer. The transducer oscillates at a high frequency, producing ultrasonic waves which are directed to the water surface, atomizing the water Solenoid Valve and Float Switch (Automatic water supply mechanism). Water level suitable for atomizing is maintained by means of the float switch and a solenoid valve Water Tank The Ultrasonic nebulizer units for atomizing mist are mounted in the bottom of the water tank. The water level is constantly maintained by the water supply float switch and solenoid valve.

9 1.6.4 Fan The flow of air from the fan carries the atomized mist from the water tank to the outside Air Filter Filter for removing coarse dust from the air and prevent the humidifier water tank and interior from becoming dirty Control Board Printed circuit board containing relays and protective circuit devices used to control the operation of the unit Power Switch An ON-OFF switch for the humidifier. An indicator lamp illuminates when the switch is turned ON Conductivity Sensor (Optional) A probe installed in the water supply piping for monitoring water quality Overflow Pipe This pipe drains off water from the water tank if the level in the tank rises higher than the designed level for any reason. A 5/8 I.D. hose, (provided by user), should be connected to this pipe and positioned so it can safely drain water away from the unit Drain Pipe This pipe is for draining the water tank during servicing and maintenance. To use, remove the drain cap first Water Supply Valve (To be provided by user) This valve should be installed upstream from the humidifier for service and maintenance. The valve must be rated for use with DI water Distribution Ducting The distribution ducting consists of multiple pieces which may be assembled as needed to fit the humidifier s mist distribution system to your particular application. The following distribution ducting parts are provided as standard: Mist Guide Tubes- This tube directs the mist out of the humidifier. It has a slope of about 5 degrees to keep large particles of mist from escaping. Flexible Duct Hose- This hose connects the mist guide tube to the connecting pipe. It must be gently sloped upwards and not be formed into a U-shape to prevent water from collecting. Connecting Pipe- This pipe connects the flexible duct hose to the mist outlet elbow. Connecting pipes must be cut to proper length to prevent the flexible duct hose from taking a U-shape. Mist Outlet Elbow- This flanged elbow blows mist into the space to be conditioned. Hose Clamp- This secures the flexible duct hose to the connecting pipe and the mist guide tube Mist Output Potentiometer (Standard on models SCA1000X & SCA2000X) This external device plugs into a receptacle on the back of the humidifier. The mist output potentiometer may be used to adjust the amount of mist produced by the humidifier. Adjustment Range: SCA1000X to 2.2 lb/hr SCA2000X to 4.4 lb/hr Receptacle For Potentiometer Potentiometer Model SCA1000 Model SCA1000X 1-5

10 1.7 Parts Illustrations Exterior Figure 1- External Parts Fan 1-6

11 1.7.2 Interior Figure 2- Internal Parts Printed circuit board Water Tank Body of water supply compression fitting 1-7

12 2.0 INSTALLATION 2.1 Receiving the Equipment Your Ultrasonic humidifier has been tested and inspected prior to shipment. To ensure that your equipment has been received in excellent condition, make a visual inspection of the equipment immediately upon delivery. Carefully remove the shipping container and all protective packaging. Open the box and thoroughly inspect the unit for any signs of transit-incurred damage. If there is shipping damage, it must be noted on the freight carrier's delivery forms BEFORE signing for the equipment. Any freight claims MUST be done through the freight carrier. SATS ships all equipment FOB factory. SATS is not liable for any equipment damage while in transit. SATS can assist in the claim filing process with the freight carrier. Should any such damage be present, notify the SATS Product Support Group prior to attempting any repairs. Refer to Section 5.0 of this manual for instructions. Check the equipment against the packing slip to see if the shipment is complete. Report all discrepancies to the appropriate authority. Contents of Package: 1. Humidifier. 2. Mist guide tubes and distribution ducting. (SCA sets; SCA sets) 3. Compression Fitting (1/4 ). 4. Installation, Operation and Maintenance manual. Avoid dropping or jarring the unit to prevent damage to the internal parts. The unit should always be stored in a dry location prior to installation. A Data Package has been sent with your unit. It contains this manual, system drawings, applicable MSDS s and other applicable instructions based on the configuration and options of your unit. The data package has been placed in your unit in a clear plastic envelope. These documents need to be kept with the unit for future reference. 2.2 Site Preparation SATS ultrasonic humidifiers are designed with easy service access in mind. SCA Series humidifiers are to be installed outside the conditioned space and connected with distribution ducting. Install the unit in a secure location where it cannot be tampered with and the power switch cannot be inadvertently turned off. Allow access to the unit for routine operation, servicing and for necessary maintenance. Position the humidifier in such a way that the unit can be easily removed for future maintenance and inspection. Refer to the layout drawing in Section 6.1 and see the installation drawing provided with your unit for the dimensions of the humidifier. NOTE Working clearance requirements need to be established prior to mounting the unit. Refer to local and national electrical codes. When selecting the installation location, attention should be paid to the air flow so that the atomized mist can be uniformly diffused. If any obstacle exists in front of the atomized mist outlet, the mist will be condensed on the obstacle to form water droplets. 2-1

13 2.3 Installation of Humidifier 1) The humidifier must be installed horizontally and level. Center the unit on top of the showcase and secure it with mounting screws. 2) If the humidifier is concealed, provide enough room for maintenance around the humidifier. 3) Insert the mist guide tubes into the openings on the top cover of the humidifier. Figure 3- Installation Diagram 15.75~19.68" 15.75~19.68" 15.75~19.68" 1.02" 2.75" 2.20" 7.87" or more 2.20" 0.24" 0.20" 2.95" 1.61" 4.76" 2.75" 1.42" Mist Outlet Elbow and Guide Tube 1) Drill holes (in 2 or 4 places) at regular intervals in the top of the showcase to mount the mist outlet elbows. Align the mist outlet elbows with the holes and secure with the mounting screws provided. 2) Use flexible duct hoses and connecting pipes to connect the mist guide tubes and mist outlet elbows. Connect parts carefully to prevent water leakage and secure ends of flexible duct hoses with hose clamps. 3) Ensure that flexible duct hoses are not bent in a U-shape. Water can collect at the bottom of a U-shaped hose, blocking the generated mist. 2-2

14 2.3.2 Supply and Overflow Piping The ultrasonic humidifier will require a field installed water supply line and overflow line. Refer to the piping diagram provided with your unit for details. For the water supply, use DI or RO water. The water supply to the humidifier cannot be taken directly from the public water service pipe. Untreated supply water will cause a problem in the room where white powder is produced after evaporation from calcium or magnesium dissolved in the water. In cases where water quality, especially residue from evaporation, ph, total hardness and water conductivity exceeds or is outside the range of standard, routine maintenance intervals for keeping normal operation will be shorter than usual. Also, the operating life of the transducers and print plates will be significantly reduced. It is essential that DI or RO water be used as the supply water source to maintain full warranty coverage. The use of untreated water will VOID THE WARRANTY. NOTE The water supply piping must be non-corrosive stainless steel or poly tubing rated for use with DI water. Prepare the water supply piping. The water supply piping should be equipped with a water supply valve (user provided) at a place as close as possible to the humidifier. The valve must be rated for use with DI water. After the water supply valve is installed, flushing should be done by supplying water, (see Section 3.2, Purge the Water Line. This is a necessary step to prevent chips and oil in the piping from entering the humidifier. Connect the piping to the humidifier by means of a 1/ 4 stainless steel or poly water supply tube (user provided). A compression fitting is provided, (see Figure 4), in the side of the unit. Use two adjustable wrenches to tighten the connection on the humidifier. (Tightening torque: approximately 90 in/lbs). Install an isolation valve in the supply water line for maintenance purposes. If there is a risk that the water supply piping could freeze, wrap the piping with insulating material. Overflow piping must be provided from the water tank for safety should any failure or problem occur. The overflow pipe stub, approximately 5/8 outside diameter, should be connected with tubing so that overflowing water can be directed into a drain pan or an appropriate place such as building drain. The overflow tubing must be sloped downward and away from the unit and the end should not be plugged. Figure 4- Compression Fitting NOTE The drain plug in the bottom of the water tank should not be removed unless an optional drain down solenoid is supplied. 2-3

15 2.3.3 Main Power/Control Wiring For wiring, refer to the electrical drawing supplied with your unit to determine the total number of interconnecting conductors required for your system and for the proper wire terminations. For internal wiring of the humidifier see the Electrical Circuit Diagrams on page 6-2. NOTE Wiring terminations may become loose during transit of the equipment therefore, verify all wiring terminations are secure prior to operation. Verify that the main power supply coincides with the voltage, phase and frequency information specified on the system nameplate. The nameplate also provides the full load amps (FLA), the current that the unit will draw under full design load, the minimum circuit ampacity (MCA) for wire sizing, and the maximum fuse size (MFS) for circuit protection. The power source must be provided with a circuit breaker for safety. Ensure a ground is connected to the unit. The circuit breaker and incoming power supply cord are to be provided by the user. The humidifier is rated to operate with an input of 48VAC/single phase. To maintain warranty coverage, never allow the humidifier input voltage to exceed 51 volts as damage will occur to the transducers and print plates. WARNING On SATS supplied control boxes, the 48 volt Hot wire will not be connected when the unit ships. Depending on the incoming power supply voltage, the taps on the secondary side of the transformer may be a higher voltage than labeled. It is important that the taps be checked with a voltmeter to ensure the voltage is within the proper range. Select the secondary transformer tap that is the closest to 48 volts and connect the Hot wire. Never exceed 51 volts as damage will occur to the transducers and print plates. It is important to note that if the control transformer is supplied with the equipment by SATS, it is sized and selected based upon the expected load for the unit. Do not connect any additional loads to the control transformer. Connecting additional loads to the factory supplied control transformer may result in overloading of the transformer which will cause the transformer circuit breaker to trip Humidistat A humidistat may be optionally provided by SATS. It should be installed at a place where changes in humidity can be accurately sensed. If customer provided, the humidistat must be a normally open dry contact type which closes when the relative humidity drops to a user selected setpoint. Refer to the electrical drawing for the voltage and current rating requirements for the contact. When one humidistat is used to control multiple humidifiers, relays should be provided so each humidifier has an independant contact. 2-4

16 3.0 OPERATION 3.1 Initial Operation Checklist For new installations, ensure the unit is ready to operate by going through the following checklist prior to start-up: 1. The humidifier is installed horizontally and level. 2. No dust or debris around the humidifier that may be sucked into the air intake when the fan turns on. 3. The electrical wiring is correctly connected and secured. 4. De-ionized or reverse osmosis water supply is used. 5. The water supply piping and overflow piping are correctly connected. 6. Open the water valve and ensure there is no leakage around the piping connections. After the above items are checked, the humidifier is ready to turn on. 3.2 Purge the Water Line The first time the unit is operated, metal shavings or debris that may form during the installation process will be flushed through the supply water piping. Referring to steps 1 to 7 in Section 3.3 below, turn the unit on and allow it to operate for a few minutes. After a few minutes of operation, perform the following: Set the main switch (circuit breaker) from the power source to OFF for safety. Close the water supply valve. Remove the drain pipe plug and drain the water tank. After draining, re-install the plug. After the the water line is purged, the humidifier is ready to operate. 3.3 Procedure for Operation 1. Turn on power to the showcase fan. 2. Open the water supply valve allowing water to flow to the humidifier. 3. Set the main switch from the power source to ON. 4. Set the ON/OFF switch on the humidifier to ON. 5. Water is supplied to the water tank and when the required water level is reached, the ultrasonic nebulizers will start atomizing, producing mist. 6. Mist is carried through mist guide tubes, flexible duct hoses, connecting pipes and mist outlet elbows by the flow of air from the humidifier fan. The mist is directed into the duct space of the showcase. 7. During operation, the water level in the water tank is maintained by the water supply float switch and the solenoid valve. 8. If the water level in the tank falls below the safety level for any reason during operation, the power to the ultrasonic nebulizers is cut off by the low level float switch. 3-1

17 After operation is started, check the following items on a regular basis: Atomizing is visible through all the mist blow tubes. Check the humidifier parts, overflow pipe and other piping for signs of leaking water. By operating the showcase fan ON/OFF, ensure that the humidifier is interconnected properly and operating when the showcase fan is on. Check to see that the mist diffusion is good and no obstacles are directly exposed to the mist. Do not remove the air filter from the humidifier during operation. Do not block the outlet of the mist guide tubes. It could cause a failure if the flow of mist is reversed. 3.4 Long Term Shutdown When operation is stopped for a long time (one week or longer), the following steps must be performed. Also, refer to Section 4.1, Periodic General Maintenance. Set the humidifier ON/OFF switch and the main switch (circuit breaker) from the power source to OFF. Close the water supply valve. Drain the water tank. Check and clean the water tank interior and air filter. For restarting operation after a long-term shutdown, see the previous Section 3.3., Procedure For Operation. 3-2

18 4.0 MAINTENANCE/REPAIRS 4.1 Periodic General Maintenance Systematic, preventive maintenance of the humidifier is recommended for optimum system performance. Routine periodic maintenance should include, but is not limited to the following: Tightening electrical connections Cleaning, inspecting the unit s components visually. Checking the level of water and ensuring no leaks are present. A system should be established to record any problems, defects or deficiencies noted by operators and discovered during maintenance inspections, together with the actions taken. For assistance, contact the SATS Product Support Group. Ensure adherence to all safety precautions while performing any type of maintenance General Before the maintenance inspection and repairs are done, be sure to set the power supply circuit breaker (main switch) to OFF and close the water supply valve. Drain the water tank by removing the drain plug. WARNING Turn off power to the unit unless you are performing tests that require power. With power and controls energized, the unit could begin operating automatically at any time. Never attempt to remove the top cover of the humidifier and/or mist guide tubes while the humidifier is operating. The transducer is a very delicate part. When the water tank interior is cleaned, special care must be taken to ensure the transducer will not be scratched on the surface with a screwdriver, etc. Do not supply power to the ultrasonic nebulizer units while the transducer lead wires (yellow and orange) are removed. Proper tools must be used. Excessive tightening or insufficient tightening may cause failure. When working, care must be taken to ensure small parts such as screws will not be lost. Care must be taken avoid injury by sharp edges of the sheet metal, etc. Solid scaffolding must be provided if working in high places. Testing insulation resistance and dielectric withstand voltage should be avoided because the humidifier incorporates sensitive electronic parts. When parts are replaced, genuine SATS parts must be used. Contact SATS Product Support Group for assistance. 4-1

19 4.2 Maintenance Table ITEM Cleaning Air filter. (See Sect ; page 4-3) INTERVAL During every cleaning of the water tank interior. Replacing Fuse. If burned out. (See Sect ; page 4-3) Inspection electrical parts Every 1,000 hours of operation. and cleaning the water Example: Humidifier is operated 8 hours per day tank interior.... approximately every 4 months. (See Sect ; page 4-3) Humidifier is operated 24 hours per day... approximately once per month. Replacing ultrasonic nebulizer unit and print plate. (See Sect ; page 4-6) Replacing Float switch. (See Sect ; page 4-8) Replaceing Solenoid valve. (See Sect ; page 4-9) Replacing Printed Circuit board. (See Sect ; page 4-9) Transducer- After about 10,000 to 15,000 hours of operation. Nebulizing Print Plate- If damaged or causing problems. Heat sink- If damaged or eroded. If damaged or upon failure. If damaged or upon failure. If the printed circuit board is damaged or if relays or other parts are deteriorated or causing problems. 4-2

20 4.2.1 Air Filter Interval: During every cleaning of the water tank interior. Tools : None 1) Turn off power and unplug the unit. 2) Pull off the air filter casing and remove the air filter. Sketch 1 3) Wash the filter material with clean water. 1 4) Lightly shake off excess water and dry it well in the shade. 5) When the filter is dried, put it back in the filter case and re-install the filter case in the humidifier. 6) If the filter is seriously clogged and cannot be cleaned by washing with water, or if it is seriously deteriorated, it should be replaced with a new one Fuses Interval: If burned out. Tools : Phillips screwdriver 1) Turn off power and unplug the unit. 2) Loosen fuse holder cap with screwdriver and remove it with the fuse. Sketch 2 2 3) Place a suitable fuse in the fuse holder cap and screw the fuse cap securely into the fuse holder body. Rating of Fuse: Fuse 1 (right) 250V 2A Fuse 2 (left) 250V 5A Water Tank Interior and Electrical Parts Interval: Every 1,000 hours of operation. Example: Humidifier is operated 8 hours per day...approximately every 4 months. Humidifier is operated 24 hours per day...approximately once per month. Tools: 2 Adjustable wrenches Phillips screwdriver Soft cloth 1) Turn off power and unplug the unit. Close the water supply valve. 3 2) Loosen the screws on the top cover of the humidifier and remove the cover. Sketch 3 NOTE Be careful not to allow water to splash on the electrical parts. If any water does splash on the electrical parts, thoroughly wipe it off. 4-3

21 3) Remove the plug from the drain pipe and drain the water tank. After draining, re-install the plug securely. 4) Remove the the water supply piping. Be sure to use two wrenches to prevent the body of the compression fitting on the humidifier from turning. Sketch 4 5) Remove the hose from the overflow pipe. 6) Loosen the screws of the terminal board and remove the connector to avoid getting an electric shock. Sketch 5 7) Check the inside of the humidifier to ensure that: a) No parts show signs of water leaking. b) There is no discoloration, deformation or deterioration of the water tank, printed circuit board or other parts. c) There is no damage to internal wiring. d) The interior of the water tank is clean. 8) Remove the body of the water supply compression fitting from the humidifier and check the o-ring to confirm it is not damaged. Sketch 6 NOTE Take care not to damage the o-ring or the part supporting the solenoid valve when replacing the fitting. 9) Pull off the 2 or 4 wires from terminals (H, G, H1 & G1) on the printed circuit board. Sketch 7 10) Remove the water tank and take it to a convenient place where it can be cleaned easily. Empty any remaining water from the tank to prevent it from splashing on electrical parts. Sketch 8 11) Remove the float panel from the water tank and manually operate the float switch arms to ensure they raise and lower smoothly. Sketch 9 12) Wipe off dirt on the float and the stem with a soft cloth. Do not remove the float from the stem. 13) Clean the surface of the transducers, etc. in the water tank by wiping with a soft, oil free cleaning cloth. Note Be careful not to scratch the surface of the transducers. 14) If any defects are found with the electrical parts, take necessary steps referring to Sect. 4.4 Common Repairs/Parts Replacement on page ) If no defects are found through the above inspection, reassemble by reversing the above procedure. Note When re-assembling, be careful not to pinch the wires

22 4.3 Troubleshooting and Repair Should any failure occur, make the necessary repairs referring to the following table. As a rule, power must be turned off when troubleshooting is performed but, if it is absolutely necessary to troubleshoot when power is supplied, special attention must be paid to avoid electric shock and short-circuiting. FAILURE CAUSE REMEDY No mist is Power source voltage incorrect. Adjust generated Fuse burned out. Adjust volt, and replace Switch is OFF. Turn switch ON Switch faulty. Replace Water supply valve closed. Open valve Water piping obstructed. Cleaning Water tank contamination. Cleaning Humidifier body not level. Make level Drain cap off. Install cap Standing water in flexible duct hose. Straighten duct hose Wrong position of mist outlet elbow for duct space of showcase. Shift the position Float switch for water supply faulty. Replace Float switch for low level faulty. Replace Solenoid valve clogged or faulty. Replace Fan faulty. Replace Transducer deteriorated due to aging. Replace Ultrasonic nebulizer unit faulty. Replace Aux. relay for water supply or power relay faulty. Replace printed circuit board Transformer fault. Replace Insufficient mist Power source voltage incorrect. Adjust Water tank contamination. Cleaning Humidifier body not level. Make level Standing water in flexible duct hose. Straighten duct hose Wrong position of mist outlet elbow for duct space of showcase. Shift the position Fan fault. Replace Transducer deteriorated due to aging. Replace Ultrasonic nebulizer unit faulty. Replace Tank overflow Humidifier body not level. Make level Float switch for water supply faulty. Replace Solenoid valve clogged or faulty. Replace Aux. relay for water supply faulty. Replace printed circuit board Remarks: If the humidifier is operated for a long time with a deteriorated transducer, the nebulizer print plate may fail. The transducer should be replaced using the estimated lifetime of 10,000 to 15,000 hours as the point of reference. If the cause cannot be located through the above checking, please contact SATS Product Support Group. 4-5

23 4.4 Common Repairs/Parts Replacement Preparation for Repairs (Removal of Water Tank) When replacing parts, first remove the water tank portion referring to steps 1 through 9 in Section Re-assembling 1) When re-assembling after replacing parts, be sure to check the following items: a) All the screws of the transducer and nebulizer print plate must be securely tightened. b) All the lead wires must be correctly and securely connected. (Special attention should be paid to the fan lead wires.) c) All the plates, boards and relays must be free from discoloration, deformation and deterioration. d) Electrical wires must not be damaged. 2) After re-assembly is completed, supply water and power and operate the unit. Check to see that normal nebulizing mist is visible from all the mist blow tubes and that there is no water leakage Replacing the Transducer and Nebulizer Print Plate Interval: Transducer... After about 10,000 to 15,000 hours of operation. Nebulizer print plate... If damaged or upon failure. Heat Sink... If damaged or corroded. Tools: Phillips screwdriver 10 1) Turn the Water tank upside down. Using a phillips screwdriver, remove the transducer mounting screws (2 Pcs.) and remove the transducer, spacer and o-ring. Save the screws to mount the new part. Sketch 10 2) When replacing the transducer, remove the two transducer lead wires, (yellow and orange). Sketch 11 Note Grasp the terminals when removing wires. Never pull the lead wires. 3) Clean the spacer, o-ring groove and o-ring. 4) Assemble the new transducer with the spacer and o-ring and install them with the saved mounting screws. Torque screws to approximately 2.7 in/lbs. 11 Notes Ensure the o-ring is not damaged. If it is damaged, replace it with a new one. Carefully align the transducer s rubber packing in the indent in the bottom of the water tank to prevent leakage. The mounting screws must be evenly tightened. Do not overtighten. 4-6

24 5) Connect the lead wires to the terminals on the nebulizer print plate. The colored lead wires must be inserted as shown on the plate. (Orange wire to ORG, Yellow wire to YEL) 6) When replacing the nebulizer print plate, remove the two transducer wires (Yellow and Orange), and the two power wires (White and Black). Note Grasp the terminals when removing wires. Never pull the lead wires. 7) Remove the nebulizing print plate plate mounting screws (2 Pcs.) and remove the plate from the heat sink. Save the screws to mount the new part. Sketch 12 8) Install the new plate together with the heat transfer silicon sheet provided using the saved mounting screws. 9) Connect the nebulizer print plate interconnecting wires (Black to H, White to G) and transducer lead wires (Orange to ORG, Yellow to YEL) Note When the nebulizer print plate is replaced, it is recommended that the transducer be replaced also ) When replacing the heat sink, remove the nebulizing print plates. 11) Loosen the mounting screws and remove the Heat sink. Sketch 13 12) Replace with a new heat sink and heat sink o-ring. Tighten screws securely taking care not to damage the o-ring. 13) Referring to Sect , Re-assembling on page 4-6, reassemble by reversing the above procedure. 4-7

25 4.4.4 Replacing Float Switches Interval: If damaged or upon failure. Tools: Adjustable wrench Wire cutter 14 1) Cut the wire ties binding the float switch lead wires. Sketch 14 Note Be careful not to damage the lead wires. 2) Remove the two wires from the float switch to the printed circuit board. Sketch 15 Note Grasp the terminals when removing wires. Never pull the lead wires. 15 3) Loosen the nut on the float switch and remove it. Install the new float switch and secure it with the nut. Sketch 16 4) There are two types of float switches; one for the water supply and the other for low water Ievel. Take care not to confuse the two during installation. They appear similar but their functions are different. Sketch 17 Type for water supply... FS1 Type for low water level... FS2 5) Referring to Section 4.4.2, Re-assembling on page 4-6, assemble by reversing the above procedure

26 4.4.5 Replacing Water Supply Solenoid Valve Interval: If damaged or upon failure. Tools: Phillips screwdriver Teflon tape 18 1) Cut the wire ties binding the solenoid lead wires. 2) Remove the wires from the solenoid valve to the printed circuit board. Sketch 18 Note Grasp the terminals when removing wires. Never pull the lead wires. 3) Remove the pipe fitting from the inlet side of the solenoid valve. 19 4) Loosen and remove the solenoid valve mounting screws. Save the screws to mount the new part Sketch 19 5) Remove the elbow on the outlet side and install the new solenoid valve on the outlet side. Be sure to seal the fitting with teflon tape. Note Ensure the elbow is facing the correct direction. 6) Install the new solenoid valve to the float panel and re-install the inlet pipe fitting. 7) Referring to Section 4.4.2, Re-assembling on page 4-6, assemble by reversing the above procedure Replacing Printed Circuit Board Interval: If the printed wiring board is damaged or relays or other parts are deteriorated or causing problems. Tools: Phillips screwdriver 20 1) Remove all the lead wires connected to the printed circuit board. Note Grasp the terminals when removing wires. Never pull the lead wires. 2) Slide the printed circuit board along the guide, remove it and install a new one. Sketch 20 3) Referring to Section 4.4.2, Re-assembling on page 4-6, assemble by reversing the above procedure. 4-9

27 5.0 PRODUCT SUPPORT GROUP SATS provides to its customers a Product Support Group which not only provides technical support and parts but the following additional services, as requested: performance evaluations, start-up assistance and training. 5.1 Technical Support The SATS Product Support Group (PSG) is dedicated to the prompt reply and solution to any problem encountered with a unit. Should a problem develop that cannot be resolved using this manual, you may contact PSG at (240) Monday through Friday from 8:00 a.m. to 5:00 p.m. EST. If a problem occurs after business hours, dial the page number (301) and follow the steps below: 1. Wait for the dial tone. 2. Dial your telephone number (including area code). 3. Press the pound (#) key. 4. Wait for a busy signal. 5. Hang up the telephone. One of our service technicians will return your call. When calling to obtain support, it is vital to have the following information readily available, (information is found on unit's nameplate): Unit Model Number (SCAXXXX) SATS Item Number (123456) Unit Serial Number ( ) Description of Problem 5.2 Obtaining Warranty Parts Warranty inquires are to be made through the Product Support Group (PSG) at (240) Monday through Friday from 8:00 a.m. to 5:00 p.m. EST. A service technician at SATS will troubleshoot the system over the telephone with a field service technician to determine the defect of the part. If it is determined that the part may be defective a replacement part will be sent UPS ground. If the customer requests that warranty part(s) be sent by any other method than UPS ground the customer is responsible for the shipping charges. If you do not have established credit with SATS you must provide a freight carrier account number. A written (or faxed) purchase order is required on warranty parts and must be received prior to 12:00 p.m. for same day shipment. The purchase order must contain the following items: Purchase Order Number Date of Order SATS Stated Part Price (obtained from PSG) Customer Billing Address Shipping Address Customer's Telephone and Fax Numbers Contact Name Unit Model No., Serial No. & SATS Item No. The customer is responsible for the shipping cost incurred for shipping the defective part(s) back to SATS. Return of defective part(s) must be within 30 days at which time an evaluation of the part(s) is conducted and if the part is found to have a manufacturing defect a credit will be issued. When returning defective part(s) complete the Return Material Authorization Tag and the address label received with the replacement part. See SATS Standard Warranty located in section one of this manual. 5.3 Obtaining Spare/Replacement Parts Spare and replacement parts requests are to be made through the Product Support Group (PSG) by fax (301) , telephone (240) or (parts@stulz-ats.com). Quotes are given for specified listed parts for a specific unit. SATS accepts Visa and MasterCard. SATS may extend credit to its customers; a credit application must be prepared and approved (this process could take one week). A 25% minimum restocking charge will be applied on returned stocked parts that were sold as spare/ replacement parts. If the returned part is not a stocked item, a 50% restocking charge may be applied. Additionally a Return Material Authorization Number is required when returning parts. To receive credit for returned repair/replacement parts, the parts must be returned to SATS within 30 days of the purchase date. Spare part sales over 30 days old will be considered final and the parts will remain the sole property of the ordering party. 5-1

28 6.0 DRAWINGS 6.1 Layout Drawing of Humidifier Specifications 3.94" Model SCA1000 SCA2000 Capacity (lb/h) 0.44~ ~4.4 Nos. of Ultrasonic Nebulizer Units 2 4 Power Supply 48VAC 50/60HZ Rated Power Consumption (w) Air Volume (cfm) Weight (lb) " 4.72" 4.72" " 10.24" 10.71".39" 2.95" 8.27" 5.12" 2.75" 1.97" 1.38" 1.38" 6-1

29 6.2. Electrical Circuit Diagrams SCA1000/2000 Typical Wiring Diagram 6-2

30 6.2.1 SCA1000X/2000X Typical Wiring Diagram 6-3

31 NOTES

32