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OPERATIONS

 

_________________________________________________________ 

 
 

CAUTION 

 

Avoid mixing combustible dust with dust from spark generating 
operations, such as ferrous or non-ferrous material grinding 
operations. Under no circumstances should lighted cigarettes, etc. 
be permitted to enter the air inlet or dust collection drawers of the 
AirWall unit. Failure to follow this instruction may result in severe 
damage to the equipment and personnel injury. 
_________________________________________________________

 

 

Filter Cleaning Operation 

 

 
The filter cleaning system uses compressed air to back flush or pulse accumulated 
particulate from the cartridge pleats.  A timer control board  starts the cleaning 
sequence. The system begins cleaning the filters anytime  the pressure differential 
between the entrance (dirty) side of the filter cartridges and the exit (clean) side 
reaches a pre-determined level.  This differential is constantly monitored by a 
Photohelic gage and switch or digital pressure sensing module.  As the filter cartridges 
become more restricted by dust accumulation, the exhaust fan creates a greater 
vacuum or pressure drop in the clean air plenum on the clean side of the filter 
cartridges. The Photohelic gage or digital sensing module monitors this vacuum and, as 
the pre-determined high set point is reached, reverse pulse cleaning cycle is started 
automatically. 
 
At the start of the cleaning cycle, a time delay of approximately 8 seconds will elapse. 
This is referred to as the "off time" and is the time necessary between pulses for the 
pressure accumulator to recharge for the next pulse.  

 

At the end of the "off time," a pilot solenoid will release the pressure on a diaphragm 
valve and a short burst of air will be transmitted through an orifice in a blow-pipe located 
above each of the rows of  filter cartridges.  The AirWall LD models have 3 blow-pipes, 
while the AirWall MD and HD models have 5 blow-pipes. The air pulse will cause a 
shock wave to blow backward through the filter cartridge. This dislodges the 
accumulated dust, which falls into dust collection drawers at the bottom of the AirWall 
unit. The pulse time is adjustable from .05 to .5 seconds in duration and is referred to 
as the "on time". Normal pulse time is 0.3 second. 
 
The cleaning cycle will continue with an "off time" and "on time", producing a full pulse 
each time, until the Photohelic gage or digital sensor module registers a pressure drop 
sufficient to stop the cleaning process.  This is pre-determined and is referred to as the 
low set point.   The high and low set points can be adjusted using the two adjustment  
 

Summary of Contents for AIRWALL HD

Page 1: ...COLLECTION SYSTEM INSTALLATION OPERATION MAINTENANCE AND REPLACEMENT PARTS MANUAL PUBLICATION NO UM AW 0211 Copyright 2011 ENVIROSYSTEMS LLC 2555 N Coyote Dr Suite 118 Tucson AZ 85745 520 573 3064 800...

Page 2: ...yer Instruments Inc AirWall and Envirosystems are registered trademarks of Envirosystems Manufacturing LLC Information in this manual is subject to change without notice IMPORTANT NOTICE This propriet...

Page 3: ...SCRIPTION D 1 FILTER CLEANING D 2 AIRWALL PRODUCT SPECIFICATIONS D 5 INSTALLATION GENERAL INFORMATION I 1 UNCRATING AND INSPECTION I 1 POSITIONING FOR ASSEMBLY I 1 ELECTRICAL CONNECTIONS I 3 FILTER CL...

Page 4: ...RATED CONTROL PANEL O 2 DUST COLLECTION DRAWERS O 3 MOISTURE ACCUMULATION O 4 CHANGING FILTER CARTRIDGES O 4 DUST COLLECTION DRAWERS O 4 FAN MOTOR LUBRICATION O 5 TROUBLESHOOTING O 5 REPLACEMENT PARTS...

Page 5: ...his precaution may result in severe bodily injury __________________________________________________________ GENERAL SAFETY INSTRUCTIONS AND CONSIDERATIONS Machine owners and operating personnel must...

Page 6: ...and toxic material that are in excess of those allowed by applicable OSHA USEPA ACGIH or NIOSH regulations and recommendations Wear clean approved eye or face protection Keep your protective equipment...

Page 7: ...upervisor or safety department Worn or broken flooring ladders and handrails unstable or slippery platforms or scaffolds must be repaired before use Do not use skids stock media drums or boxes as make...

Page 8: ...r operate any machine until you read and understand all safety instructions Assign only qualified fully trained personnel instructed in safety and all machine functions to operate any equipment Operat...

Page 9: ...bered or labeled tags on those wires not marked If wiring is replaced make sure it is of the same type length and size and has the same load carrying capacity An electrical technician must analyze the...

Page 10: ...ystems Manufacturing LLC representative The user must determine that any other person performing work with electrical power ON is trained and technically qualified Failure to follow this precaution ma...

Page 11: ...ir then passes through the filter medium from the outside to the inside of the filter cartridges and out the open top of each cartridge This leaves the dust on the out side surface of the cartridges T...

Page 12: ...rse components is several time longer than competitors units where the header tank is mounted externally 2 Timer Control Board This solid state device controls the cleaning cycle of the filter cartrid...

Page 13: ...ize and open a 1 in diameter valve Each pilot solenoid is energized in turn by the timer control board 5 Diaphragm Valves There are three 3 or five 5 pilot operated dia phragm valves in each AirWall S...

Page 14: ...AIRWALL SPECIFICATIONS Model AWC 2S Unit Dimensions Height Excludes Blower Height Inch 66 mm 1676 Width Inch 57 mm 1448 Length Inch 208 mm 5283...

Page 15: ...cartridges Standard Spunbond 80 20 No 20 20 Total Filter Area Sq Ft 2400 6000 Air Requirements Pulse Air Supply 3 0 CFM 90 100 psi 6 2 6 9 bars Electrical Requirements Pulse System 2A 120 VAC 1 Phase...

Page 16: ...pped on separate skids and some of these components may be drop shipped directly from an approved ES vendor to shorten delivery time NOTE Use extreme care when handling the unit and components Careles...

Page 17: ...ift or chain fall to lift the exhaust fan and motor assembly into position on top of the filter cartridge section clean air plenum See CAUTION CAUTION Do not hoist the fan motor assembly by lifting on...

Page 18: ...st is pointed Align the mounting holes in the fan motor assembly with the mounting 8 holes in the top plate of the clean air plenum 9 Use the 2 1 2 bolts flat washers and flange nuts to secure the ass...

Page 19: ...of the filter stand The gasket will seat on the metal frame Once the filter is in place swing the locking bolts into position so that the locking bolts hook on the edge of the filter corners f Evenly...

Page 20: ...CAUTION CAUTON Do not connect circuit test equipment to the timer control board The use of certain types of test equipment can seriously damage the timer control board components Failure to follow th...

Page 21: ...ematic will be supplied with the manual PNEUMATIC CONTROL CONNECTIONS In addition to the electrical connections two 2 pneumatic control connections must be made from the AirWall unit to the Photohelic...

Page 22: ...pipe extending through the hole and connect the pipe to the fitting provided in the bottom of the tube sheet This connection is positioned between the back two rows of filter openings 2 3 Connect an a...

Page 23: ...en the filter cartridge retaining nut enough to compress the seal and test by making sure the filter cartridge can no longer be rotated by hand 7 Repeat this procedure for the entire back row of filte...

Page 24: ...__________________________________________________ Normally there is an arrow on the blower indicating proper rotation of the fan blades If this arrow is not visable carefully look into the fan exhaus...

Page 25: ...filters 4 Use the small knob on the lower left of the gage face to set the left or low point needle to 2 0 Use the knob on the right to set the right or high point needle to 2 5 on the gage NOTE The...

Page 26: ...idges The Photohelic gage or digital sensing module monitors this vacuum and as the pre determined high set point is reached reverse pulse cleaning cycle is started automatically At the start of the c...

Page 27: ...nd the MAN OFF AUTO selector switch The MAN OFF AUTO selector switch controls the operation of the Photohelic gage and switch or digital sensor module and must be in the AUTO position to enable on dem...

Page 28: ...check the dust collection drawers located in the bottom of the air filtration dust collection unit Dispose of any waste accumulation according to federal state and local environmental regulations See...

Page 29: ...lter cartridges because of the weight dropping down when the filter cartridge retaining nut is removed from the threaded end of the support rod See WARNING ____________________________________________...

Page 30: ...purpose ball bearing grease having rust inhibitors and anti oxidant additives Suggested greases are Shell Alvania No 2 Mobil Mobilith SCH 100 Texaco Premium RB2 American Rykon Premium 2 Lubricate bea...

Page 31: ...r leaking vent line or fitting between a diaphragm valve and its pilot solenoid These are located in the clean air plenum The affected valve can be quickly isolated by holding a hand below each of the...

Page 32: ...r if non warranty The following replacement parts are common to all standard AirWall models QUANTITY PART DESCRIPTION PART NUMBER 1 Button bleeder 2 way 32 21 001 1 Controller sequence 6 position 37 0...

Page 33: ...ANTITY PART DESCRIPTION PART NUMBER 2 Baffle section galvanized 14 11 001 4 Strip corner 14 10 019 The following replacement parts are common to AirWall Models AW100 HD AW120 HD and AW160 HD QUANTITY...

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