Air-Flo Manual - DeWan Packaging
Contents
1. bags Safety Features This machine has been implemented with two important safety features The first one is the front deck It has been designed to allow it to swing away from the rear deck in the event that any foreign objects are inadvertently pulled in by the belts If a hand or clothing gets caught in the belts just pull toward the front and the belts will separate allowing quick and easy removal The second safety feature this machine boasts is a solid state timer wired into the circuits What s important about this is that while the machine is operating the heat elements can run up to 600 degrees When the main power is turned off DO NOT UNPLUG the timer function turns on for five minutes and continues to supply power to the blower to cool the heat elements and to the in feed motors to keep the belts moving to avoid the possibility of scorching them or causing a fire Requirements This machine requires one 110volt 30amp outlet If a conveyor was provided with this machine it may be plugged into the auxiliary outlet located on the rear of the machine Recommendation DeWan Manufacturing recommends using a high polyethylene content bag for best results It is recommended to leave this machine plugged for at least five minutes after turning the main switch off to allow for the cool down cycle Adjustable Features There are six features that will need to be in proper adjustment to obtain a quality seal they include2. 4X797E GR 753 5261 MC 3XC57 GR W58XB1A4A2 ASP W58XB1A4A10 ASP W58XB1A4A15 ASP 174311 WE 4M975 GR S505 08J640 000 ASH SVDA13V50 ASH THDB415MB CS 2W320 El 70XJSGB024A ASH J6A99 BE 12 ASH 7527K68 MC M1125071 WE MXV5 720 QB TISNPN DA DWMAN 174311 WE Contact DeWan Manufacturing for replacement parts 13
3. Besides contributing to a quality seal this will also affect the appearance of the bags seal If your conveyor is running faster than the sealer the bag may bunch up causing a faulty seal If the conveyor is running to slow it will force the seal to taper up towards the right corner or even off in the bag The above information should help you get your sealer into acceptable operating range but please note a couple of factors may vary functionality Colder temperatures will affect the machines performance but can be resolved by adjusting the heat setting Also too much dust or product residue in between the seal area can result in a poor seal and may require a dust collector added to the filling station to resolve the problem Troubleshooting Problem 1 Poor Seal 2 Heaters not working Continued on next page Possible Solution Adjust temp and or in feed belt speed and or blower setting Check alignment of manifolds see diagram Check that both elements are heating should glow orange Check alignment of crimp wheels see diagram Check reset replace breakers on top cover Check connections CAUTION live wires Check replace heaters see technical assistance Check replace thermocouple see technical assistance Check power output on heater relay see technical assistance Replace heater relay Replace temp control 3 Blower not working 4 No power while plugged in Check reset repl
4. Crimp Wheels These two steel knurled wheels are located underneath the decks just to the left of the heat manifolds This machine will not produce a good seal if these wheels are not properly aligned See trouble shooting section for details Temperature Controller Located on the upper left corner of the top panel Use this adjustment in conjunction with the in feed belt speed to obtain a quality seal In feed Belt Speed Control This is the only knob located on the lower panel It regulates the speed at which the bag passes through the heaters and crimp wheels Airflow Control You ll find this dial just to the right of the temp control on the upper panel It controls the speed of the blower motor which in turn determines the amount and speed of the air passing over the heat elements Note To much air passing over the heat elements will have a cooling effect and will not provide a proper seal It is recommended to keep this adjustment between or close to 3 6 Heater Manifolds Located underneath both decks these manifolds contain the heat elements Both manifolds are adjustable to a point and should maintain an even gap over center of the belts of not less than 4 and no more than Y The manifolds should also maintain an even height in respect to the series of holes so they are heating the same area of the bag on both sides The manifolds should be set so that they are as close together as can be without contacting the bag on either
5. DeWan AIR FLOW HOT AIR CONTINUOUS HEAT SEALER SERIAL DATE THIS MACHINE AND ALL MATERIAL IN THIS MANUAL MAY BE COVERED UNDER MORE THAN ONE U S PATENT ALL RIGHTS RESERVED BEFORE OPERATING THIS MACHINE PLEASE READ OWNERS MANUAL CAREFULLY THIS OWNERS MANUAL HAS BEEN DESIGNED TO INSTRUCT YOU AS TO THE PROPER MANNER IN WHICH TO OPERATE AND MAINTAIN THIS EQUIMENT AND MOST IMPORTANTLY HOW TO OPERATE THIS MACHINE IN A SAFE AND EFFICIENT MANNER PLEASE KEEP THIS MANUAL FOR FUTURE REFERENCE DEWAN PACKAGING INC P O BOX 191 1809 NEVA ROAD ANTIGO WI 54409 1 888 803 4515 www dewanpackaging com TABLE OF CONTENTS PAGE 3 INTRODUCTION SAFETY FEATURES REQUIRMENTS RECOMMENDATIONS PAGE 4 ADJUSTABLE FEATURES PAGE 5 OPERATIONS PAGE 6 OPERATIONS CONTINUED PAGE 7 TROUBLE SHOOTING PAGE 8 TROUBLE SHOOTING CONTINUED PAGE 9 TECHNICAL ASSISTANCE PAGE 10 TECHNICAL ASSISTANCE CONTINUED PAGE 11 TECHNICAL ASSISTANCE CONTINUED PAGE 12 DIAGRAM PAGE 13 PARTS LIST PAGE 14 WIRING SCHEMATIC Introduction The intended purpose of the DeWan Hot Air Continuous Heat Sealer is to apply a quality seal on polyethylene open mouth bags ranging in thickness from one to six mils This machine is designed to operate from 1 to 62 feet per minute depending on the thickness of the bag being sealed The features integrated into this machine are completely self contained which means all you need to do is plug it in and feed the
6. ace breaker on top cover Replace blower speed control Replace blower motor Check that outlet has power Check connections on distribution block Check main relay Technical assistance Heat Elements To check the heaters for proper function follow these steps 1 Unplug both connections to heaters 2 Using a multi meter check the ohms between the wires coming out of the heaters 3 Two new elements wired together as they are in the machine measure 9 5 ohms As the elements wear out the ohm rating will go higher If you obtain a reading higher than 10 0 while wired together you may need to replace the elements You may test the elements individually The normal reading for a single element should be close to 18 8 Any elements measuring over 20 0 ohms may need to be replaced Thermocouple Through the thermocouple the temp control reads the heat output of the elements and turns them on until they obtain the temperature set on the control and then turns them off until the temp drops below the setting That is the cycle you hear a few times a minute when the blower slows down If the heat elements do not work no heat the thermocouple may be burned out in the off position or the wires may have disconnected Check the connections first If the elements are not responding to the temp control and overheating the thermocouple may have burned out in the on position Replace the thermocouple To check if the th
7. ay should be orange but may vary in color 3 If functioning properly the meter should read around 110v AC Main Relay Test the main relay s functionality by 1 Using the multi meter set to AC voltage then following the wiring schematic Place the red probe on the 3 terminal and the black on any of the numbers 14 15 or 16 on the distribution block With the main switch on there should be 110 volts AC present at the terminal If this test failed there is no power to the main relay You may need to replace the main switch or confirm power to the distribution block 2 With the previous test checking ok place the red probe on the 1 terminal of main relay and the black probe on any of the numbers 14 15 or 16 on the distribution block Again with the main switch turned on there should be 110 volts AC present If this is true than the main relay is functioning properly Continued on next page 10 Blower Motor If the blower motor quits working follow these steps to diagnose If the blower motor is on or runs intermittently with the power off refer to 4 below 1 Check that the blower speed control is supplied with power To do this use the multi meter to check that 110v AC power is present on the 1 and 3 terminal of the timer relay by placing a one probe on each terminal at the same time If power is present continue to 2 step 2 3 4 Check power coming out of the speed control by unplugging the
8. blower connections and placing one probe on the yellow wire and one on the red wire With the main switch turned on rotate the control while watching the meter If no power is present than you should replace the control Note that the voltage will fluctuate if present as the control is turned If both of the previous tests prove proper function than replace the blower motor This is a problem that may occur on machines purchased after July of 2006 Because of a change the manufacturer of the timer relay has made we have added a resistor between the s 1 amp 3 terminals If this resistor fails it will likely cause the blower motor to run even with the machine turned off To rectify this problem you will need to replace this resistor on the timer relay Replacement resistors may be obtained from DeWan Manufacturing and must be installed in the direction shown on the schematic Timer Relay There a few problems that could relate directly to the failure of the timer relay A description and solution of each follow If the machine fails to time out for five minutes after the main switch is turned off then conduct the following test Use the multi meter set to AC to check that power is provided to the timer First place one probe on the 16 terminal on the distribution block and the other on the 13 terminal on the same block There should be 110v AC present If this is correct then move on to step two Check that the orange wire f
9. ermocouple is ok perform the following procedure 1 Using the multi meter again set it to continuity test Remove the thermocouple wires from the terminals on the temp control When touching one wire with each probe there should be continuity If no continuity is present you need to replace the thermocouple Variable Speed Board The variable speed board is essential in order to control the speed of the in feed belts This is usually a maintenance free item and will be set to the proper adjustments when received by the customer In the event of any issues with this board please contact DeWan Manufacturing for assistance Continued on next page Temperature Controller Test the function of the temp control with these steps 1 Using the multi meter set to DC current place one probe on the 3 terminal of the heater relay and the other on the 4 terminal 2 With the machine powered on and temp control turned up the meter should read around 12 volts DC If this is true then the temp control is functioning properly Heater Relay To check proper function of the heater relay 1 Unplug the orange wire that runs from the 2 terminal on the heater relay 2 With the machine on and the temp control turned up check for AC voltage running through the orange wire by placing the red probe on the end of the orange wire and the by placing the black probe on a ground such as a bolt Note that the wire on the 2 terminal of the heater rel
10. he same as the ones you intend to run and while holding it straight and taught from end to end feed it into the right end of the machine After it passes through the sealer it should have a uniform pattern across the entire bag There may be a slight pinch at the beginning of the seal which is normal but can be worked out After allowing a few seconds to cool properly check the seal by attempting to open the bag If the seal tears open easily you will either need to slow the belt speed to allow more heating time or increase the temperature or perhaps both If the seal appears melted you will have to increase the speed and or decrease the temperature A good seal should be no less than 4 wide After you obtain a good seal on the sample bag you may try running a filled bag Keep in mind that a full bag behaves differently than an empty one It is very important to introduce the full bag in the same manner as the empty one with the tops even and the bag taught from corner to corner You will not obtain a good seal if the bag is bunched up or doubled over itself Once the leading edge of the bag is in the belts pull taught and slightly up on the other end and this should produce an even seal across the bag Continued on next page Another factor you will need to look at here is the conveyor belt speed If you are using a conveyor to support the bags its speed will need to be very closely matched to the speed of the in feed belts on the sealer
11. rom 16 on the Dist Block is connected to the 3 terminal on the timer relay Then follow step three Check that there is power present at the 2 terminal of the timer relay by placing the red probe on the 2 terminal of the timer relay and the black probe on the 16 terminal on the Dist Block Move to step three if power is present Once more you will need to check for power This time on the 6 terminal of timer relay Place the red probe one the 6 terminal and the black probe on the 3 terminal of the timer relay If all of the above tests were successful than the timer relay will need to be replaced 11 Diagram When looking down the belt line from the right end of the machine this is how the crimp wheels should appear oe Note that the wheels are parallel and perpendicular you should see just a sliver of light between the two If the wheels appear misaligned you may adjust the outside wheel with the four bolts on the mounting bracket For further technical assistance please contact DeWan Manufacturing 12 Parts List Temp Control Temp Control Socket Blower Speed Control Belt Speed Control Main Switch 2 Amp Breaker 10 Amp Breaker 15 Amp Breaker Variable Speed Board Blower Motor Main Relay Heater Relay Timer Relay Resistor Thermocouple Ring Heater Elements Distribution Block In feed Motors In feed Belts Crimp Wheels Heater Manifolds Variable Board TOS B4SJ6F ASH 600 3 0011 ASH
12. side as it passes Height Adjustment Screw Adjust the height of the deck from your conveyor by loosening the locking bolts against the vertical tube and turning the handle until you achieve the desired height Remember to tighten the locking bolts Operations To begin with set the temperature controller to zero the blower motor to five and turn the in feed belt control about Y of a turn Now plug the cord into a 110volt 30amp outlet At this point the machine should remain off Power the machine on by flipping the rocker switch located on the upper cover You should hear the blower motor kick on and the in feed belts should be moving Now depending on the thickness of the bag you will adjust the temperature controller For thinner bags such as the thickness of an ice bag you can start around 175 degrees Thicker bags for fertilizer potatoes or corn will require 250 350 degrees Note that when the red light on the temp control is on the elements are heating and you will hear the blower motor slow down This is normal Once the elements reach the desired temperature the light will go off and the blower motor will speed up This cycle will take place a few times per minute and is normal The majority of the adjustment to obtain the optimum seal will be made with the temperature and the speed of the in feed belts If you have purchased a fixed speed heat sealer that means the in feed belt motors speed is not adjustable Take a sample bag t
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