LAWSON OMEGA-G GAS DRYER

Transcription

1 INSTRUCTION MANUAL LAWSON OMEGA-G GAS DRYER FOR YOUR SAFETY, DO NOT STORE OR USE GASOLINE, SPRAY ADHESIVES, OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE. YOU THE PURCHASER MUST POST IN A PROMINENT LOCATION INSTRUCTIONS TO BE FOLLOWED IN THE EVENT THE USER SMELLS GAS. CONSULT YOUR LOCAL GAS SUPPLIER FOR PROCEDURE TO BE FOLLOWED IF THE ODOR OF GAS IS PRESENT. INFORMATION AND SPECIFICATIONS CONTAINED IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. Omega G Dryer rev: December 18, 2006

2 Congratulations on your purchase of the Lawson Omega-G Gas Dryer. To insure successful performance of your Omega-G Gas Dryer, please read this entire manual thoroughly. The very best equipment requires some minor preventive maintenance and a complete understanding of its operations and control systems. This manual is offered to help you get the best possible performance from this equipment. Your attention to the principles on which the Lawson Omega-G Gas Dryer has been designed can help you make your new Omega-G one of the most profitable equipment investments you have ever made. Should you need it, Lawson's continued service is always available. If you have any questions about the Lawson Omega-G Gas Dryer, please contact us. We are always ready to be helpful. Your comments and suggestions are always welcome. Phone: (314) Fax: (314) After Hours Pager: (314) and press option #6 Website: info@lawsonsp.com Omega G Dryer rev: December 18, 2006

3 LAWSON SCREEN PRODUCTS 5110 PENROSE STREET ST. LOUIS, MO (314) Fax (314) Congratulations on the purchase of your new Lawson Omega-G gas textile dryer. We have developed this guide to help make the installation of your dryer easier and hassle free. If, after reading this information, you still have questions, please do not hesitate in calling. When the phone operator answers, simply ask for the Service Department and you will be connected with one of our service technicians. DRYER SPECIFICATIONS: 48" wide Omega-G gas textile dryer with optional IR pre-heat. ELECTRICAL, GAS and VENTILATION REQUIREMENTS: The standard Omega-G Gas Dryer requires a volt, 60 Hz, 3-phase 4 wire service. Consult a qualified electrician for proper wiring sizes and shut off/breaker boxes according to local codes. Electrical Specifications: Standard Unit: 230 Volts, 3-phase Amps (Optional: 120/230 Volts, 1 phase Amps) Gas Specifications: The installation must conform with the National Fuel Gas Code ANSI Z The burner will operate at 375,000 BTUs per hour. A 1" N.P.T. fitting is provided for the gas hook up. Consult your local gas contractor for service pipe size based on the length of your particular service run and other geographic concerns (i.e. altitude). A minimum of 7" water column pressure is necessary for proper burner operation. Ventilation Requirements: The unit exhausts approximately 800 CFM of air. This is the minimum amount of airflow that would be necessary in the shop to replenish the air that is expelled. For proper operation and maximum performance, the amount of airflow inside the shop needs to be at least equal to the airflow out of the dryer. A 10" diameter pipe flange has been provided for exhaust. This is the minimum size to be used. Often a 12" pipe with an 10" increaser is needed for proper exhaust. The exhaust pipe is located 4' 10" from the front of the heat chamber and is located on the opposite side of the electric control panel. SPACE REQUIREMENTS: The overall footprint of the dryer is: 192" x 77" x 52" (L x W x H). Another 40" should be added around the dryer to allow operator movement. IMPORTANT: The gas dryer should be placed on a solid, flat, non-combustible surface with at least 3 feet distance between the dryer and any obstruction or any flammable materials (such as gasoline, paint thinners, spray adhesive, etc.) In accordance with NEC ENTRANCE DOOR SIZE: CRATED WT: The crated size of the dryer: 204" x 89" x 62" 2000 lbs. (L x W x H) UNLOADING THE DRYER FROM THE TRUCK: It will be your responsibility to unload the dryer from the truck. In most cases (if not all) the truck driver will not offer any assistance. The use of a fork lift with extended forks (6-8 ft. long) is highly recommended. Omega G Dryer 1 rev: December 18, 2006

4 INSTALLATION: Professional set up by a factory trained technician is available for all Lawson Equipment at a nominal charge. Although factory set up is not mandatory, we highly recommend this service. Doing so will insure your dryer is set up quickly, is set properly to factory specs, the burner/flame properly adjusted and your staff trained in the Omega-G s use and maintenance, and thus minimizing any unnecessary frustration or downtime. Omega G Dryer 2 rev: December 18, 2006

5 Instructions: Lawson Omega-G Gas Dryer Manufactured by: Lawson Screen Products, Inc Penrose St. St. Louis, MO Service Telephone: Fax #: Serial Number: (Please fill in for future reference by your maintenance department.) Refer to this serial number when speaking with Lawson's Service Department...it contains valuable information related to this piece of equipment. Dryer Operation: Do Not operate this machine without reading this entire instruction manual first! Do Not start adjusting the dryer until its entire function and operation is fully understood. If you have any questions, please call prior to operation. Free training is available at our St. Louis headquarters, and site training is offered at your factory for a nominal fee plus expenses. Omega G Dryer 3 rev: December 18, 2006

6 Introduction: Safety Precautions To ensure safe, reliable operation, all personnel should become thoroughly familiar with this unit by paying close attention to these basic instructions: 1. For your safety, do not store or use gasoline, spray adhesive, or other flammable vapors and liquids in the vicinity [at least three feet (3')] of this or any appliance. 2. The purchaser must post in a prominent location instructions to be followed in the event the user(s) smell gas. This information can be provided by your local gas company. 3. Vent lines must be installed from all gas line components equipped with a vent fitting to the outdoors by a qualified HVAC engineer. 4. Proper grounding must be provided. 5. Permanent electrical information is provided inside or on the control panel. 6. Never alter the internal wiring of this machine. 7. Never place anything but the substrate to be dried on the conveyor belt. Do not overload the conveyor belt. 8. Do not let the conveyor belt track off the conveyor rollers. 9. Keep all loose articles (including clothing, hair, etc.) away from the conveyor belt. 10. Regularly clean or replace the air filters and keep ventilation screens unobstructed. 11. Never leave the machine unattended when it is operating. 12. Do not perform maintenance on this machine until power has been shut OFF at both the control panel and incoming power circuit breaker. Omega G Dryer 4 rev: December 18, 2006

7 Setup: Take care during uncrating so as not to damage the Omega Gas Dryer. Once the crating has been disassembled, the unit can be moved into position. The best method of transporting the Omega-G Gas Dryer is to use a forklift, lifting from the bottom, underneath the crate. Once the unit is placed into position, remove all shipping materials locking the dryer to the skid. Using the forklift, lift from under the center of the heater box. Do not lift from the ends. Visually check to make sure the forks go the complete width of the dryer prior to lifting. This procedure will help reduce the possibility of damage due to improper lifting. If the forks are too short, it may be possible to use 2 x 4's as extensions. It may be necessary to put the boards at a 90 degree angle (across the forks). Make sure the boards are long enough to reach the angle supports under the dryer. Lift the dryer only enough to remove the skid. Have several assistants spot the dryer while it is being lifted to steady and guide the unit. The Omega-G Gas Dryer should be positioned on a solid, flat, non-combustible surface, with at least three feet (3') between the dryer and any obstruction, according to NEC Position the dryer to be convenient for the operator(s) loading and unloading the printing press(s). Omega G Dryer 5 rev: December 18, 2006

8 Service Connections: Electrical: The standard Omega-G Gas Dryer requires a 208 to 240 volt, 60 Hz, three-phase 4 wire service, with the exception of export models. Single phase is optional, however, so check the electrical information on the serial number plate for the correct specifications of your machine. Have a qualified electrician connect the dryer according to the electrical schematic furnished. The power circuit must be protected by a fuse or comparable circuit breaker and grounded in accordance with National Electric Code (NEC) ANSI/NFPA No and all local codes. Specifications: 230 volts 3 Phase- 27 Amps (optional) 230 volts Single Phase- 46 Amps There is a cutout provided in the left side of the control box for the electrical service entrance. There is a power block located immediately inside the box. Connect the three phase service to terminals A, B, and C. Connect the ground to the grounding lug just above the power block. Check the main blower for proper rotation before installing the exhaust duct. The air should be exhausting at the duct. If the air is being drawn in instead of exhausting, reverse any two of the three legs. (This condition is not an issue for single phase models). BE SURE TO DISCONNECT ALL POWER AT THE FUSE/BREAKER BOX PRIOR TO SERVICING OR MAINTAINING THIS EQUIPMENT. Gas: The dryer and its individual shut-off valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of ½ psi There is a 1" connection provided on the left side of the control box for the gas service entrance. The dryer requires a minimum pipe size of 1" N.P.T.. There is also a shut off valve at the same location. The regulator is set at 7" water column pressure. Consult your local gas company for the proper gas pipe for your particular location. The length of the run and the number of bends in the line greatly affect the piping size. In some cases the pipe size may need to be increased. Omega G Dryer 6 rev: December 18, 2006

9 Adjustments: The manifold pressure is factory set for 7" water column pressure. This pressure should not be readjusted unless absolutely necessary. Be sure to contact the Lawson Screen Products service department before adjusting the regulated pressure. There is an adjustment for adjusting the gas flow. Consult the Lawson service department before making any changes to the gas system. HIGH FLAME- Is the "bulb" shaped control. Adjust this control counterclockwise to increase the maximum attainable temperature. If the temperature stabilizes lower than the set temperature, increase the gas flow by turning counterclockwise. NOTE: changing the preset settings will affect the performance of the burner, possibly causing it to be less efficient. HIGH FLAME FLOW CONTROL Figure 3 A cut off valve is also provided outside the gas train control box. This valve should be left in the OFF position whenever the dryer is not being used. CUT OFF VALVE Figure 4 Omega G Dryer 7 rev: December 18, 2006

10 Ventilation: Proper ventilation is essential. The unit exhausts approximately 900 CFM of air and this is the minimum amount of airflow that should be provided inside the shop. The amount of airflow inside the shop should be at least equal to the airflow out of the dryer. A 12" round collar is provided on the back of the dryer for the exhaust duct attachment. There is a slot cut in the top of this flange for the damper. The size of the damper is factory calculated for proper air flow, so make sure it is fully installed and seated. In addition, an exhaust duct must be installed by a qualified HVAC engineer to vent the air expelled from the dryer. Properly vent the duct outside the plant. In calculating the diameters and bends of the ducting, the objective is to exhaust the same amount of airflow (here, 900 cfm) out through the ducting as is available at the dryer exhaust duct itself. The 900 cfm figure should be used as a basis for duct configuration. The installation must conform with the National Fuel Gas Code ANSI Z Any questions concerning this requirement should be referred to your local gas utility company. Omega G Dryer 8 rev: December 18, 2006

11 Belt Installation: The belt on the Omega-G Gas Dryer was installed, fitted, and run prior to shipment. It is important to reinstall it so that it is in the same position. Carefully follow the positioning directions written on each belt. It will take two people to install the belt and attach the zipper hinge. To install: 1. Unhook the latches located on the top of each of the four end side panels (see figure A). Remove the panels. 2. Starting from the infeed end, slide the belt into the dryer following the positioning directions. Make sure the belt is on top of all belt supports. 3. Feed the belt through the heat chamber and around the drive pulley. Return back through the small opening into the heat chamber (figure B), and around the infeed pulley. Be careful not to snag any obstructions, as damage to the belt could be expensive. 4. Connect the zipper hinge. Starting at either end of the hinge, interlock the eyes. Be sure the corners of the belt are straight, as though it were one continuous piece (figure C). If they are not straight, then reenter lock the hinge. Once it is properly positioned, feed the small metal rod through the eyelets. If the belt seems too tight, then reposition the idler pulley. Retract the belt once it is installed. Be sure to have the dryer at its operating temperature 9

12 Control Panel: A. Master...Supplies power to the control systems on the panel. B. IR Heat...Turns on the radiant IR heat panel. Indicator light illuminates. 1. Blower... Starts the blower motor. The blower must be on and operating properly for the gas system to work. 2. Burner Switch...Initiates electrical flow to the protectifier and solenoid valves. The system will not start with the burner switch off. 3. Purge/Ready...Light illuminates after proper sequencing, timing and purge functions. 4. Pilot Start...Depressing this switch after the purge light illuminates provides an electrical spark. The burner ignites in low flame. There is a timing factor involved. If the unit does not ignite within 1 minute, the system will shut down and must go through the purge sequencing again. 5. Gas Heat... Powers the gas temperature controller which controls the modulating gas valve. C. IR Temperature...IR temperature controller. D. Gas Temperature...Digital gas temperature controller. E. Belt Speed...Belt speed controller- adjusts the speed of the conveyor belt. F. Voltage...Indicates incoming line phase/voltage to the control box. When connected to 3 phase service, all lamps will illuminate. G. IR Heater Circuits... Indicator light cycles on/off with the cycling of the ir heater panel. There are 3 lights per heater. When the lights are on, the heaters are not heating. 10

13 H. Conveyor System...Input Indicator Light signifies incoming voltage to the belt speed controller...output Indicator Light signifies output voltage of the belts speed controller. The lamp will be brighter at faster speeds and dim at slower speeds. I. Safety Indicator...Indicator Light illuminates if there is a loss of air pressure in the blower system. The gas system will shut down and the flame will go out if this light illuminates J. Fuses...Panel-Mount fuses protect the Belt Speed Controller, Gas Control System, and IR and Gas Temperature Controllers. Control Panel - Optional AT Style: 11

14 Omega-G Gas Dryer Start-Up Procedure: Follow these steps to properly start-up the Omega-G Gas Dryer. 1. Make sure the gas is on at the main shut off valve. 2. Turn Master Switch ON. The belt will begin to move (unless the controller is set to "0". 3. Turn Blower Switch ON. The dryer will go through an approximately 60 second purge cycle to introduce fresh air into the chamber. 4. Turn Burner Switch ON. 5. Wait for Purge/Ready light to illuminate. 6. When the Purge/Ready light illuminates, depress and hold the Pilot Start button until the Gas Flame indicator light comes on. Then release the button. If the pilot does not ignite within 60 seconds, the dryer controls automatically shuts off the gas flow. You must allow the dryer to repurge. The Purge/Ready light will also go out. 7. Turn the Gas Heat ON. This opens up the High Flame gas line. 8. Set desired Hot Air temperature with the Gas Temperature Controller by pressing the up arrow or down arrow button. Once the set temperature is achieved inside the dryer, the valve will modulate to control the temperature of the internal air. 9. Turn on the Radiant Heat Switch. Set the temperature with IR Temperature Controller. 10. Set/check Desired Belt Speed (see belt speed adj. section). 12

15 Omega-G Gas Dryer Shut-Down Procedure: Follow these steps to properly shut-down the Omega-G Gas Dryer. 1. Turn OFF Radiant Panel Power Switch. 2. Turn OFF Burner Switch. 3. Turn OFF Gas Heat Switch 4. Let cool for approximately 5 minutes with the belt running. 5. Turn OFF Blower Switch. 6. Turn OFF Master Switch. 7. Shut off the electricity at the disconnect. 8. Shut off the gas with the shut off valve. 13

16 How the Omega-G Gas Dryer Works: Jet-Air Knife System: The dual cure system of the Omega-G Gas Dryer greatly reduces time and energy requirements. Driving air at high velocity causes turbulence, or cavitation, as small voids or vacuum pockets are created in the airstream. This cavitation action absorbs the volatile. Once air mass or the flow of air begins or absorb the moisture or volatilize, it must be discharged to prevent rewetting or other unstable conditions. The Jet-Air Knife System operates as follows: A. High-pressure warm air is forced downward through the Jet-Air Knife to impinge upon the printed substrate as it passes through the drying chamber. This high-powered air absorbs volatilize, enhances the drying characteristics of the inks and reduces time and temperature requirements. B. Volatile-laden air is drawn through the mesh conveyor belt and into the lower chamber of the dryer. A portion of this air is then channeled into the Exhaust Blower to supply fresh air and prevent saturation of the recirculating air. C. Remaining air, in the lower chamber, is drawn into the Main Blower and forced at high pressure into the top of the Jet-Air Knife section of the dryer. D. Air passes through the gas furnace to maintain proper temperature. This air returns to the Jet Knife and the Jet-Air Knife cycle begins again. Infra Red System: After the volatilize have been removed, the next phase of the process is setting inks to the printed material through the use of an infra red heater. This requires application of an adequate amount of energy without producing a deleterious effect on the substrate. NOTE: Cleanliness of the Jet-Air Knife action is an extremely important factor in the performance of the infra red panel as well as the air knife system. Lint and contamination buildup must be removed frequently. Daily inspection and cleaning of the filters at the first sign of clogging is recommended. 14

17 Optional IR Zone: Heating Element Circuit Lamps: Heating Element Circuit Lamps turn OFF when contactors feed power to the heating elements. Once these elements reach their set temperature, the lamps will cycle on and off to indicate proper operation. When a Heating Element Circuit Lamp cycles on, the heating element is not receiving electricity so as not to exceed the set temperature. Consequently that element is not heating. When a Heating Element Circuit Lamp cycles off, the power is applied to the element so as not to fall below the set temperature. Radiant Heat Panel(s): The last section of the Omega-G Gas Dryer consists of a Radiant Heat Panel. This emits high-intensity heat energy which penetrates the ink deposit. Heat energy is absorbed by the ink, which promotes the final cure. The temperature thermocouple (monitor) for the Radiant Heat Panel System is mounted inside the heater. It identifies the temperature at the heating panel rather than at the surface of the substrate. The temperature indicated on the controller is the actual temperature of the heater panel and is to be used as a reference only and not an indicator of the heat absorption of the garment. The heat absorption rate for a particular substrate is directly related to the time of exposure to the heat. This system provides the most accurate means of controlling the radiant effect of the heat panels and allows the operator to establish a comparative standard from job-to-job. NOTE: To regulate the temperature of the Radiant Heat Panel: 1. Use the up arrow and down arrow to set the Infrared Radiant Heat Panel. The readout temperature is the actual temperature of the heater, not the temperature at the belt. The common IR temperature range is degrees F. 2. Regulate substrate exposure to the Infrared Radiant Heat Panel by means of the height adjustment provided on the dryer. To adjust the height, simply turn the two black knobs located on top of the dryer at the out feed end. Turning the knob clockwise will raise the element. Normal height adjustment of 7" is recommended. The height will need to be adjusted. The panels are placed in a different position for shipment. 15

18 Conveyor Belt Adjustments Belt Tension: There are two adjustable pulleys on the Omega-G Gas Dryer conveyor assembly. Before any belt tension adjustments, run the conveyor on slow speed with the temperature controllers set at 350 F (177 C) for 10 minutes. This will preheat the belt and allow for proper tensioning. The conveyor belt will move from side to side during cold and hot conditions, however, make sure the belt always stays on the rollers. Turn the adjustment bolts CLOCKWISE on the idler pulley located on the in-feed end of the conveyor to increase tension on the belt. Turn the adjustment bolts COUNTERCLOCKWISE to decrease tension on the belt. Adjust the belt tension in small increments only and avoid adding too much tension to the center of the belt. Be sure to adjust the tension equally on both sides. It is a good idea to adjust the tension with the infeed pulley first, then use the drive roller to "fine-tune" the belt tension if necessary. Do not over-tension the belt. Belt Tracking: If the conveyor belt is shifting to one side, the idler and drive pulleys are not parallel. Extend the take up slightly on the side towards which the belt is shifting, by turning the adjustment bolt slightly clockwise. Run the belt for several minutes to check adjustment. Belt Tension Adjustment: Most of the adjustments of the belt tension are made at the infeed end of the dryer. 1. Adjust the pulley on the side that the belt is tracking to by turning the adjustment bolt slightly clockwise. 2. There should be no less than 1/2" deflection in the belt 4" from the crown of the pulley. If the belt is already tight, turn the adjustment bolt on the side from which the belt is tracking counterclockwise. This action will loosen the belt somewhat, decreasing the force that is causing the belt to move. 3. Run the belt for a few minutes to confirm that the adjustment is correct. Figure 7 CAUTION: Make only very minor adjustments to the belt tension and avoid adding too much tension to the center of the belt. 16

19 Belt Speed: Belt speed is controlled by the Belt Speed Control on the Main Control Panel. The optimum speed for any job is best determined by testing. The faster the belt travels, the less heat exposure the substrate will receive. Among other determining factors in selecting proper belt speed are chemical composition and thickness of the inks as well as the type of substrate and moisture content of the substrate. Proper belt speed for each job should be determined through individual test samples. Digital Belt Speed Readout: The Digital Speed Readout permits the operator to precisely gauge the speed of the conveyor belt and to reduce the need for test runs. Once the requirements of a job have been initially determined, setup can be repeated to meet the exact same settings for future production runs. To adjust the belt speed, simply turn the black knob located under the display area. For a minor increase or decrease of temperature on the garment, often it is best to regulate the temperature with the belt speed. Adjusting the belt speed will have an immediate result, while adjusting the temperature will take 5-10 minutes for it to stabilize. 17

20 Special Troubleshooting Section: Symptom Problem Corrective Action Blown fuses(s). Overloaded conveyor drive motor. Conveyor motor brushes worn ¼" or less and/or worn commutator. Poor AC or DC power line connection. Poor control power connection to potentiometer (speed control pot), inhibit terminals. Potentiometer (speed control pot) defective. Motor brushes making poor contact with commutator. Irregular speed and load jumping. Check/correct conveyor belt tension. Check gear reducer for proper operation. Reduce load on motor. Inspect motor commutator before brushes are changed. Look for rough surfaces, scoring, etc. Sand smooth or replace if worn. Replace brushes. To seat new brushes, run motor near rated speed for one hour under a no-load condition. Check power connections and rectify any poor connections. Check power connections and rectify any poor connections. Replace potentiometer. Clean out carbon dust. Clean commutator. Check commutator for wear or scoring, sand smooth or replace if worn. Check/replace conveyor bearings. Check belt tension- belt too tight. Check gear reducer for proper operation. 18

21 Symptom Problem Corrective Action Conveyor belt does not track. Conveyor drive does not run. Take up and drive rollers are not parallel. Blown fuse on control panel. Blown fuse on incoming power lead Inoperative motor or lines leading to the motor. Adjust belt tension. Extend the roller center line on the take up roller side that the belt is tracking towards. NOTE: Do this only to the point that the belt tension does not become too great. Replace fuse. Replace fuse Check circuit and power to the belt drive motor and/or replace the motor. Conveyor motor makes noise. Worn brushes. Replace brushes. The speed on a conveyor belt does not remain constant, or the conveyor does not run at all. Shirt or transfer sheets flutter out of control on the belt. Hot-Air Section is not coming up to temperature. Ink does not cure. Inoperative solid-state motor controller. Motor controller potentiometer is defective Motor or brushes on the conveyor motor are defective. Too much air is entering the master unit at the ends. Insufficient gas pressure. Fuse in panel is defective. Insufficient time is provided in the curing unit for the particular ink type. Garment temperature entering the air knife section is too low, requiring the air knife section to provide too much of the heat rise in the substrate. Remove and replace the solid-state motor controller. Remove and replace. Remove and replace motor o r motor brushes. Close the exhaust panel to increase the amount of air recirculating or raise the bonnet to reduce air velocity. Supply correct gas pressure. Check for short or replace fuse. Reduce the belt speed to provide more time. Increase the temperature on the radiant panels to a higher level. (It is recommended that these panels be run at approximately 875 to 925 F.) 19

22 Symptom Problem Corrective Action (Ink does not cure, cont.) Radiant panel temperatures cannot be controlled. They constantly drop to the lowest reading although the controller indicates the temperature is too high (light is on). Control box hums. On solvent-based inks, the solvent is not being adequately removed from the air knife section. Either the air section or the radiant panel modes are inoperative due to failures in the temperature controller. Failure of the thermocouple wire connection internal to the radiant panel. Dirt or contaminant has entered contactors. Defective contactor. Increase the opening size of the exhaust blower to allow more air to be removed from the air knife section. Check the condition and response characteristics of the temperature controllers to determine if the feedback temperature follows the set point temperature. Remove and replace the defective panel with the thermocouple. (Specify size of the existing panel.) Use an air hose or other air source to blow out the area of the contact points. Replace contactor. Material scorches or becomes brittle as it passes through the dryer. Temperature continues to rise beyond the selected setting on the controller. Mercury Contactor is stuck closed. The material is being exposed to too much radiant energy. Drying time is too long. Temperature set too high Temperature control and/or thermocouple is inoperative. Replace mercury Contactor Raise the heating panels somewhat to reduce the amount of heat transfer being passed to the substrate and/or reduce the temperature of the radiant heat panels. Increase conveyor speed. Lower IR temperature setting Replace the temperature controller and/or the thermocouple. If the Hot Air section of the Omega-G Gas Dryer does not turn on, call Lawson Screen Products, Inc. at

23 Maintenance: Daily: Monthly: Check air filters. Clean if clogged. Keep dryer area clear of all combustibles. Grease blower shaft bearings. Grease conveyor shaft bearings. Check conveyor drive motor brushes for wear. Clean out any carbon dust. Check and clean the flame rod. Check and/or clean Jet-Air Knives and exhaust system. Remove all lint and residue. Six months: Check tension and integrity of blower V-belt. Replace if cracked, worn or glazed. Adjust for ½" deflection. Every 2000 hours: Change conveyor drive motor brushes. 21

24 Specifications: Omega-G Instruction Manual OMEGA-G 48 Voltage/Amperage: 208 to 240 VAC, 60 Hz, three-phase with a 4 wire service. 230 volts 3 phase - 27 Amps 230 volts single phase - 46 Amps (optional) Chamber Length: 8 ft. Conveyor Length: Overall: Infeed: Delivery: 16 ft. 4 ft. 4 ft. Belt Width: 48" Production Level: Weight: 60 doz./hour 1500 lb. Overall Size: (uncrated) (L x W): (crated) Exhaust Vent Size: Exhaust FPM: Gas Pipe Size: 16 ft. x 77 in. 16 ft. x 89 in. 12"Dia. Round 900 1" N.P.T. (minimum) NOTE: Install this gas dryer on a noncombustible surface with a working clearance of three feet (3') to any obstruction. Failure to heed this rule will put you in violation of NEC regulation