Liberty Weld Cell User & Maintenance Manual

Learn how to setup and maintain your Clean Air Industries Liberty Weld Cell.

Document #CA I -00141.R001

T ABLE OF C ONTENTS

TABLE OF CONTENTS.............................................................................................................................................. 1

SHIPPING RECEIVING, AND INSPECTION ................................................................................................................ 6

R ECEIVING AND I NSPECTION .............................................................................................................................................6

B EFORE I NSTALLATION B EGINS ..........................................................................................................................................7

LIBERTY WELDCELL EVO TM DESCRIPTION................................................................................................................ 8

FEATURES AND SPECIFICATIONS ............................................................................................................................ 9

G ENERAL F EATURES ........................................................................................................................................................9

B LOWER / M OTOR S PECIFICATIONS .................................................................................................................................10

U NIT W EIGHT ..............................................................................................................................................................10

INSTALLATION ..................................................................................................................................................... 11

General Installation Guidelines............................................................................................................................11

TOOLS NEEDED FOR INSTALLATION ..................................................................................................................... 12

Required Tools: ....................................................................................................................................................12

Optional / Recommended Tools: .........................................................................................................................14

WARNINGS AND LABELS ...................................................................................................................................... 15

M OVING THE L IBERTY W ELDCELL M AIN U NIT ...................................................................................................................16

COMPRESSED AIR CONNECTION .......................................................................................................................... 17

A IR R EGULATOR ...........................................................................................................................................................17

A IR F ILTER ...................................................................................................................................................................17

D RY A IR ......................................................................................................................................................................18

S HUT O FF V ALVE ..........................................................................................................................................................18

ELECTRICAL CONNECTIONS .................................................................................................................................. 19

I NTERLOCK A CTIVATE /D EACTIVATE ..................................................................................................................................21

P OWER D ISCONNECT S WITCH .........................................................................................................................................21

B REAKERS ...................................................................................................................................................................22

K EY L ATCH ..................................................................................................................................................................22

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E MERGENCY S TOP ........................................................................................................................................................23

FIRE SUPPRESSION ............................................................................................................................................... 24

F IRE S UPPRESSION F UNCTIONS ........................................................................................................................................25

FSS C OMPONENTS .......................................................................................................................................................26

Key Switch ............................................................................................................................................................26

Fire Pull ................................................................................................................................................................27

Smoke Sensor.......................................................................................................................................................27

Primary Heat Sensor ............................................................................................................................................29

Secondary Heat Sensor ........................................................................................................................................30

Heat Detection Tube ............................................................................................................................................31

FSS Pressure Switch..............................................................................................................................................31

Strobe / Horn .......................................................................................................................................................31

Louvers ................................................................................................................................................................. 32

Fire Suppression Agent ........................................................................................................................................32

Additional Sprinkler .............................................................................................................................................32

F IRE S UPPRESSION P ROCEDURE ......................................................................................................................................33

1) Initial Detection ...............................................................................................................................................33

2) Secondary Detection ........................................................................................................................................33

3) Tube Heat Detection ........................................................................................................................................33

4) Manual Detection ............................................................................................................................................33

5) Alert .................................................................................................................................................................33

6) Extinguish ........................................................................................................................................................34

6) Inspect .............................................................................................................................................................34

7) Restart .............................................................................................................................................................34

8) Reset ................................................................................................................................................................34

9) Install the Replacement Generator..................................................................................................................34

10) Normal Operations ........................................................................................................................................35

FIRE SUPPRESSION TESTING PROCESS:................................................................................................................. 35

LIBERTY WELDCELL FEATURES.............................................................................................................................. 37

S OFT S TART ( OPTIONAL ) ................................................................................................................................................37

P RESSURE T RACKING ( OPTIONAL ).....................................................................................................................................37 E CONOMIZER TM ...........................................................................................................................................................37

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S LEEP F UNCTION ( OPTIONAL ) .......................................................................................................................................... 37

R EDUCED M AINTENANCE ( OPTIONAL )...............................................................................................................................37

R EDUCED N OISE ...........................................................................................................................................................38

SYSTEM CONTROLLER .......................................................................................................................................... 39

F ILTER C LEANING C ONTROLS ...........................................................................................................................................40

A UTO P ULSE M ODE :......................................................................................................................................................41

T IMED P ULSE M ODE : .....................................................................................................................................................41

C OUNT P ULSE M ODE : ....................................................................................................................................................42

M ANUAL P ULSE M ODE : .................................................................................................................................................42

O PTION M ODE : S HUT D OWN P LS # .................................................................................................................................. 42

O PTION M ODE : S HUTDWN DEL P .....................................................................................................................................42

O PTION M ODE : R UN P LS DEL P .......................................................................................................................................42

O PTION M ODE : A LARM DEL P .........................................................................................................................................43

O PTION M ODE : S LEEP T IME ...........................................................................................................................................43

O PTION M ODE : M OTOR ................................................................................................................................................43

O PTION D EFAULTS ........................................................................................................................................................44

HMI: .........................................................................................................................................................................45

Monitoring Mode ................................................................................................................................................. 46

Main Screen .........................................................................................................................................................47

Settings Screen.....................................................................................................................................................48

Unit Configurations Screen ..................................................................................................................................48

Pulse Settings Screen ...........................................................................................................................................49

Email Screen.........................................................................................................................................................49

Fire Screen ...........................................................................................................................................................49

Schedule Screen ...................................................................................................................................................50

MOTOR CONTROLS .............................................................................................................................................. 51

STARTUP PROCEDURES ........................................................................................................................................ 51

SHUTDOWN PROCEDURES ................................................................................................................................... 52

MAINTENANCE .................................................................................................................................................... 53

V ACUUM P ORT M AINTENANCE .......................................................................................................................................53

C ARTRIDGE F ILTER M AINTENANCE ...................................................................................................................................54

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Filter Features ......................................................................................................................................................54

Filter Maintenance ............................................................................................................................................... 54

Where to Start .....................................................................................................................................................55

How to Determine the Filter Change Interval ......................................................................................................55

What determines the maximum acceptable pressure differential reading? .......................................................56

How to replace filters...........................................................................................................................................57

APPENDIX A: FILTER MAINTENANCE LOG SHEET .................................................................................................. 60

APPENDIX B: DIMENSIONAL DRAWINGS.............................................................................................................. 61

APPENDIX C: EXPLODED VIEWS ........................................................................................................................... 62

APPENDIX D: WIRING DIAGRAMS ....................................................................................................................... 65

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S HIPPING R ECEIVING , AND I NSPECTION

R ECEIVING AND I NSPECTION

Congratulations on the purchase of your new Clean Air Industries Liberty Weldcell System!

Upon receipt of the Liberty Weldcell, remove the master packing list from the unit and

reconcile it with the total shipment.

Report any discrepancies to Clean Air Industries as soon as possible.

Clean Air America’s Liberty Weldcell units are shipped via freight and generally arrive on a

flat bed trailer. The main units are partially crated, on a pallet, and are shipped lying on their

sides.

Remove the packaging from the unit; then remove the unit from the pallet.

Carefully inspect the unit and any other items shipped with the unit for any damage that may

have been incurred during shipping. If damage is found, report it to the shipping company and Clean Air Industries immediately.

Accessories may be packaged and shipped on a separate pallet depending on the order.

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B EFORE I NSTALLATION B EGINS

Prior to using your Liberty Weldcell, it must be fully assembled and placed in its final

operating location.

Adequate electrical and compressed air must also be connected to the Liberty Weldcell.

These connections are defined in “Electrical Connections” and "Compressed Air

Connections" sections of this manual.

During installation, always be careful. The Liberty Weldcell is a large heavy unit and may

require experienced personal to move and set up.

For functionality and safety, Clean Air Industries does not recommend modifying the Liberty Weldcell unit in any way. Never allow the unit to intake any flammable or explosive

gasses.

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L IBERTY W ELDCELL EVO TM D ESCRIPTION

DISCLAMER: The Clean Air Industries Liberty Weldcell is designed to accumulate smoke

residue / particles and other by-products of the manufacturing process.

The nature of these accumulations may be flammable. Operating the

Liberty Weldcell with these materials could result in a fire inside the unit.

The Liberty Weldcell is not recommended for use with highly combustible

materials or explosive materials or particles.

The Clean Air Industries Liberty Weldcell consists of:

Unit Housing

Motor / Blower System

Four/Eight Cartridge Filters

Online Automatic Pulse Filter Cleaning System

The “dirty air” inlet is located on top of the unit. The “clean air”

outlet is located at the bottom of the unit. The optional silencers or

exhaust deflectors may be installed over the exhaust. The large

opening door provides easy access to the internal cartridge filters.

A removable panel also allows easy access to the motor and

blower.

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F EATURES AND S PECIFICATIONS

G ENERAL F EATURES

NEW Futuristic Remote HMI Interface accessible from PC/Tablet/phone via an app

downloadable from App Store or Google Play Store

NEW Monitor multiple Clean Air Industries EVO Units from one screen

Patented Down-Flow Air Cleaning Technology

Filter Element Design: 19.7" OD x 26" Long, Flame Retardant, 100% Cellulose

One filter with an area of 320 sq. ft. per filter.

Silencing: Built-in Acoustical Lining

Heavy Steel Construction and Powder-Coat Paint Finish

Pulse Air Reservoir; 1" Valves; 1" Compressed Air Connection

1.0 ft 3 Valve Pulse at 70 - 90 psi

Clean Air AutoPulse TM Controller: A Programmable Pulse Controller with Filter Differential

Readout; Manual Mode Options

Variable Frequency Drive(VFD); On / Off Push Button with Center Light; Disconnect Switch

Customizable Filters

Low Noise level (noise level varies based on unit, options chosen, and application)

Soft Starting option available to avoid initial amperage spikes

Pressure tracking to maximize airflow for filter loading

Economizer TM for automatic start and stopping of the motor / blower based on demand

Sleep Mode to reduce energy usage and maintain blower rotation during intermittent

operations

Managed blower and airflow speed for reduced dust impaction and better cleaning cycles

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B LOWER / M OTOR S PECIFICATIONS

Backward incline, air foil high efficiency plug type blower(s)

3 Phase 230, or 460 Volts (575V)

3450RPM

Premium efficiency NEMA MG-1; 230-460 V/60/3 (std.)

U NIT W EIGHT

The weight of the unit is approximately between 1900-2100 lb.

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I NSTALLATION

The Liberty Weldcell requires some minor assembly.

A standard unit will come with an exhaust cover pre-installed.

In some instances, filters may be shipped separate from the unit, requiring installation on site.

See the 'Liberty Weldcell Accessories User Manual' for accessory assembly instructions.

General Installation Guidelines

Clean Air America’s Liberty Weldcells are shipped via freight and generally arrive on a flat bed trailer or

box trailer. The units are typically palletized. Use a fork lift truck driven by a qualified individual, to remove

the unit and other pallets from the truck. Occasionally, fork extensions are helpful.

Once the unit is inside the facility, ready to be unpackaged, please proceed cautiously. Banding

straps, cardboard, and plastic wrap must be removed.

Liberty Weldcells are heavy and tend to be irregularly weighted. The motor and the majority of the

metal are located at the bottom of the unit. Please see the "Unit Weight" section for proper weights.

There are (4) steel plate eyelets vertical on the top of unit or section. These are the lifting lugs and

can be used for moving the unit around. There is multiple 3 ” feet lo cated on the bottom of the unit.

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T OOLS N EEDED FOR I NSTALLATION

The Following tool lists are given as a general outline. Additional tools may be used or substituted

based on availability. The required tool list is given as a bare minimum required to assembling a

Liberty Weldcell. Powered tools are recommended.

Required Tools:

(1) 5 /

(2) 7 /

32 " Allen Wrench

16 " Box Head Wrenches

(1) Fork Lift Truck

(1) Utility Knife

(1) Set of Lifting Chains

(1) Set of Ratchet Straps

(1) Small Flat Head Screwdriver [for Electrical Connections]

(2) 9 /

16 " Box Head Wrenches

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(1) Ratchet

(1) Air Ratchet

(1) Cordless Drill

(1) 7 /

5 /

7 / 16 " Drive Socket

16 " Socket Bit

(1)

32 " Allen Bit

(1)

(1) 9 /

9 / 16 " Drive Socket

16 " Socket Bit

(1) Flashlight

(1)

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Optional / Recommended Tools:

(1) Set of Fork Extensions

(1) Fork Lifting Tool

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W ARNINGS AND L ABELS

HIGH VOLTAGE: The voltage of Liberty Weldcell is dangerous

once connected to a power supply. Incorrect installation may

cause damage to the equipment, serious injury, or death.

Consequently, it is essential to comply with instructions in this

manual, local and national safety rules, and follow all safety

procedures including proper lock out and tag out procedures.

Hazardous Voltage: The Variable Frequency Drive (VFD)

uses large capacitors which can hold a charge long after the

power disconnect has been used to disconnect power from the

unit. Do not service the panel until the VFD has fully

discharged.

GROUND CONNECTION: Proper grounding of the equipment

and electrical panel is essential. Do not attempt to operate the

equipment without electrically grounding the panel. The

connection to the earth ground must be proper and provide a

low impedance path to the earth to prevent hazardous

voltages from appearing on equipment

COMPRESSED AIR: Compressed air is used in the operation

of this unit. Follow proper lock out / tag out procedures prior to

servicing the unit. This includes draining the compressed air

reservoir inside the unit. Failing to do so can lead to injury or

hearing loss. Look out – drain tank – do not service while

pressurized.

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M OVING THE L IBERTY W ELDCELL M AIN U NIT

There are various ways to move the Liberty Weldcell unit.

If the Liberty Weldcell unit has NOT been

uncrated or is still on the pallet, then it can

easily be moved by using a fork lift truck.

Place the forks under the pallet's main

beams and simply lift the unit. Keep in mind,

the motor side of the unit is heavier and

forks may need to be shifted toward the

motor end.

If the Liberty Weldcell unit has been

uncrated and has been fully assembled, then it can be moved by using a fork lift truck. Place the

forks under the under the unit. Keep in mind that Liberty Weldcell is a tall unit and need to be

moved with caution to avoid hitting

obstructions or tipping over. Make sure

not to scratch or damage the unit.

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C OMPRESSED A IR C ONNECTION

In order for the automatic pulse filter cleaning system to operate, the Clean Air Industries Liberty Weldcell requires a compressed air connection to be made.

The compressed air inlet is located at the back of the unit

This Liberty Weldcell compressed air inlet supply is a 1” NPT male fitting

Use a regulator to adjust the pressure to 70 to 90 PSI.

A dryer may be needed to condition the air before entering the Liberty Weldcell.

1.0 ft 3 Valve Pulse at 70 - 90 psi

5/8" Minimum compressed air supply line required; 1" Recommended

NOTE: Do not operate the Liberty Weldcell for an extended period of time without an

appropriate compressed

air supply. Doing so will

greatly diminish the life

of the filter cartridges.

A IR R EGULATOR

The compressed air for the Liberty

Weldcell must be regulated at 70 to 90

PSI. A Regulator is used to allow the

high-pressure air supply lines or tanks

to be reduced to safe and usable

pressure for pulsing the unit. If the pressure is too low, the valves may not properly clean the filters. If

the pressure is too high, it may damage the valves.

A IR F ILTER

The compressed air for the Liberty Weldcell must be clean. Dirty air entering the system can cause

damage to pneumatic components. The air should be filtered to remove all contaminants by the

compressed air supply system prior to entering the Liberty Weldcell.

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D RY A IR

The air supply to the Liberty Weldcell must be dry or drained. Water carried with air into the Liberty

Weldcell can wash away lubricating oil. This can mean excessive wear to pneumatic components and

higher maintenance expenses. Without adequate lubrication pneumatic components can run

sluggishly and inefficiently be prone to air leakage. Water in the supply line must be removed using a

dryer or water drain trap.

S HUT O FF V ALVE

Each unit must be fitted with a shut off valve capable of being locked out with blow off capability.

Safety procedures such as lock out / tag out procedures must be followed with pneumatic as well as

electrical systems. This means, the valve must be a 2-way valve which will exhaust the air from the

Liberty Weldcell when the shut off valve has been locked out. The exhaust port should be fitted with a

pneumatic muffler to reduce noise if above unacceptable levels.

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E LECTRICAL CONNECTIONS

Clean Air Industries Liberty Weldcell can be set up to operate on various power sources. Please see the following electrical chart based on the specified power. To ensure proper operation, a certified Clean Air Industries , Inc. installer or professional electrician should perform power connections. Any damage incurred from improper electrical power connection will void the

warranty of the Liberty Weldcell.

The incoming power is connected to the unit at the conduit connection located on the top of the

electrical. A hole must be drilled for the installation of the conduit connector.

When power is brought into the Liberty Weldcell through the EMT Conduit fitting, it will enter the

electrical box at the back of the box.

First make the ground connection to the grounding studs in the electrical panel

The incoming power wires must be terminated on the incoming side of the power disconnect

switch / emergency shut off switch (L1, L2, L3).

Primary branch circuit protection must be provided by the end user. The breaker must have an IC

trip rating of 30kA. Please see the following chart for recommended breaker size.

A wiring diagram for the Liberty Weldcell is provided in the Electrical Panel

The full load amperage varies depending on the unit configuration. Please the following chart for

motor and unit full load amperage ratings (FLA).

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I NTERLOCK A CTIVATE /D EACTIVATE

The safety circuit is set up so that the drive will not activate without the internal interlock

being activated. The “Green” double push button releases the drive interlock and allows the

drive to operate.

The interlock resets on power loss and must be reactivated when power is reconnected.

The interlock can be deactivated by pressing the E-Stop Button or by turning the disconnect

to off position. The safety circuit is set up so that the drive will not activate without the internal

interlock being activated.

P OWER D ISCONNECT S WITCH

This switch controls the main power to the Liberty Weldcell.

When the switch is in the “0” or "OFF" position, the

main power to the unit is disconnected.

When in the “1” or "ON" position, main power is

reaching the unit and it can be started.

Under normal operating conditions, the unit will not

start when the green "START" push button is

depressed if the disconnect is in the "0" or "OFF"

position.

This switch also provides a means to lock out the

switch using a small padlock thus preventing

accidental power up.

This is an interlocking disconnect; meaning, the door

to the electrical box will not open if the switch is in the

"ON" position.

When dial is in:

“0” position — all main power to the unit is OFF

“1” position — the unit is powered up and ready for operation, the unit is ON

CAUTION:

Prior to performing maintenance always use a meter to confirm the

power source is locked out.

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B REAKERS

Multiple breakers are located in the electrical box.

Breakers showing GREEN are 'safe' or tripped and will not

allow current through the breaker.

Breakers showing RED are 'hot' and will allow current through

the breaker.

K EY L ATCH

The key latch is a cam style latch that

rotates clockwise to unlock the electrical

box, and counter clockwise to lock the

electrical box.

Simply insert the key into the key hole, and

press down firmly while the key is rotated.

When closing the electrical box, the gasket

will need to be compressed. This may

require additional force in closing the

electrical box.

Keep in mind, the electrical box also has an

interlocking disconnect / emergency shut off switch. If this switch is not deactivated, the door

will not open even if the key latch is unlocked.

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E MERGENCY S TOP

The Emergency Stop Switch is a manually-operated electric switch to

cut off electric power independent of the regular operating controls.

An emergency stop function is a function that is intended to:

• Avert arising or to reduce existing hazards to persons,

damage to machinery, or to work in progress

• Be initiated by a single human action when the normal

stopping function is inadequate for this purpose. This will

leave the FSS operational.

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F IRE S UPPRESSION

Caution: All personal should be informed and properly trained to work around an active fire suppression system prior to performing any maintenance on a Clean Air Industries unit equipped with fire suppression.

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F IRE S UPPRESSION F UNCTIONS

The functions of the fire suppression system (FSS) are driven by the Smart Relay. Heat and smoke

sensors internal to the unit are used for fire detection, and the system can be activated manually

through the fire pull. The system behaves as follows:

If:

Then:

The Key Switch is turned OFF

The fire suppression system is deactivated

(Key will be retained)

The motor/VFD will shut down immediately, valve pulsing is shut down immediately, louver closes immediately, alarm/strobe will activate immediately, and the fire bottle is triggered after a 20 second delay. The motor/VFD will shut down immediately, valve pulsing is shut down immediately, louver closes immediately, alarm/strobe will activate immediately, and the fire bottle is triggered after a 20 second delay. The motor/VFD will shut down immediately, valve pulsing is shut down immediately, louver closes immediately, alarm/strobe will activate immediately, and the fire bottle will NOT be triggered. The motor/VFD will shut down immediately, valve pulsing is shut down immediately, louver closes immediately, alarm/strobe will activate immediately, and the fire bottle is triggered after a 20 second delay. The motor/VFD will shut down immediately, valve pulsing is shut down immediately, louver closes immediately, alarm/strobe will activate immediately, and the fire bottle is triggered immediately.

The Fire Pull is activated

The Primary Heat Sensor is

triggered

The Smoke Sensor is triggered

(Valve Compartment)

The Secondary Heat Sensor is

triggered

(Filter Compartment)

Fire detector hose burst/Fire

Pressure Switch is triggered

Note : Fire bottle uses ABC dry chemical or FM200.The default is the ABC dry chemical unless specially

requested.

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FSS C OMPONENTS

Key Switch

NOTE: The system can only be deactivated while

the power is off. The key switch will not function

once power to the panel has been turned on using

the Disconnect.

The key switch is located on the front of the

electrical door, and it is a retentive key switch. This

means while the system is turned off, the key cannot

be removed. It is recommended that the key be

removed when the fire suppression system is active as a visual check. The fire suppression system

can only be deactivated when the power to the electrical disconnect is off. Once the power is on and

the key has activated the fire suppression system, the system will not turn off even if the key switch is

activated. The power must be off to deactivate the system. The key switch is wired fail safe so that if

the wires are removed or cut, the fire suppression system is activated.

The fire suppression system can be deactivated using the key switch. When changing the filters in the

system per proper maintenance, dust can be dropper through cads and below the filter compartment.

This dust can then trigger the smoke sensors in the valve compartment. To prevent this, it is

recommended that the fire suppression be turned off using the key switch for several minutes upon

restarting the system after a filter change. After several minutes, the fire suppression can be

reactivated while the system is still running (it need not be restarted again). This process is only

necessary after filter changes, not on all startups.

If the key switch has been activated, the display will show “FSS OFF” as shown in the picture below.

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Fire Pull

The fire pull is used for the manual activation of the fire suppression system. These are typically

mounted remotely so that cell operators can activate them in emergency

situations. The fire pull will be mounted on the front of the electrical door. A

key is used to reset the fire pull once it has been activated, and a glass

tube can be inserted to detect an activation that has been reset.

To reset the fire pull, the power must be turned off before the fire pull has

been reset. The internal program of the Smart Relay latches shut

electronically, forcing the power to be cycled off and then on. If the fire pull

has been activated, the Fire Pull Indicator will light up as shown in the

picture below. This will then engage the fire pull action (see Fire

Suppression Function section for more details)

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Smoke Sensor

The smoke sensor is located on back wall of the valve compartment next to the primary heat detector

under the air reservoir. It can be tested by using a magnet to trip the relay inside. This is done be rubbing

the magnet over the area marked “TEST”. Cans of smoke can be purchased as well for a functional test.

The smoke sensor is set off by certain types of contaminants in the air found in smoke. If dust from the

filters is allowed to get into the valve compartment, this can set off the smoke detector. Also if the filters

are misaligned, the smoke can bypass the filters and enter the valve compartment tripping the sensor.

When sensor is working properly, it will have two green flashing LEDs on the sensor head. When the

senor (smoke or heat) is tripped, both LEDs will turn red and stop flashing. If dirt or contaminant is

introduced to the sensor, it can build up and cause false trips. The sensor head must then be taken apart

and cleaned by blowing the contamination out with compressed air.

NOTE:

The heat sensor and smoke sensor use the same base. The bases are wired

identically with the exception that the normally open signal is routed to a

different location in the electrical box.

To reset the smoke sensor, the power must be turned off and the unit and sensor blown out with

compressed air to clean out any remaining smoke dust. The internal program of the controller latches

shut electronically, forcing the power to be cycled off and then on. If the smoke sensor has been

activated, the Smoke Indicator in the Fire Screen will light up (see below).

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Primary Heat Sensor

The primary heat sensor is located on back wall of the valve compartment next to the smoke sensor. It

should be visible on the wall opposite the compressed air reservoir when being viewed from the access panel. For indoor units, the sensor is activated if the temperature reaches 135 o F. For outdoor units, the sensor is activated if the temperature reaches 190 o F. It can be tested using a heat gun directed towards

the sensor

To reset the primary heat sensor, the power must be turned off and the sensor must be allowed to cool.

The internal program of the controller latches shut electronically, forcing the power to be cycled off and

then on. If the primary heat has been activated, the Heat Detector 1 indicator will light up.

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Secondary Heat Sensor

The heat sensor is located on back wall of the filter compartment. This is the divider panel between the

filter compartment and the motor/valve compartments. It should be visible between the first and second

rows of filters without removing the filters. For indoor units, the sensor is activated if the temperature reaches 135 o F. For outdoor units, the sensor is activated if the temperature reaches 190 o F. It can be

tested using a heat gun directed towards the sensor.

If airflow is present the heat sensors and smoke sensors in the valve compartment will be activated

sooner. A signal is sent to the controller to activate the rest of the fire suppression system.

To reset the secondary heat sensor, the power must be turned off and the sensor must be allowed to

cool. The internal program of the controller latches shut electronically, forcing the power to be cycled off

and then on. If the primary heat has been activated, the Heat Detector 2 indicator will light up.

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Heat Detection Tube

Heat Detection Tubing is a new fire detection system implemented by Clean Air Industries since January 2020. The tubing runs along the wall in the filter compartment. When temperature reaches 375 o F, the tube bursts and immediately releases the fire suppression agent. The heat detection

tubing is implemented to allow the system to release the fire suppression agent during power loss.

The heat detection tubing comes with pressure switch to monitor whether the fire suppression agent

has been released.

FSS Pressure Switch

The pressure switch monitors the pressure in the

heat detection tube. When the tube bursts, the

pressure in the tube will drop. This triggers the

pressure switch, which will then send signal to

the PLC to let the PLC know that the fire

Strobe / Horn

The fire strobe and horn are built into one unit operated by

24VDC. Typically, the fire strobe is mounted to the front of the

electrical door. On some applications, remote fire strobes are

mounted for indication elsewhere in the facility. When the alarm is

activated, an auditory horn will sound and a flashing strobe light

will be visible.

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Louvers

The louvers are located on top of the unit on the

intake and exhaust. They are pneumatically

controlled using solenoid valves. Activation of

the valve opens the louvers, deactivation closes.

There are indicator lights on the DIN connectors

for the valves to show if power is present or not.

The louvers are opened and shut using a

pneumatic cylinder. The cylinder has a spring

extension so that the loss of power will force the

louvers shut. Check valves are in place so that if

compressed air is lost or low, the louvers will not shut blocking air flow to the unit. Compressed air is

not required to close the louvers, only to open them due to the spring extension.

The door is sealed using bubble gasket. The seal is only to block air flow, and is not necessarily a

100% seal.

The louvers close to prevent airflow when the fire suppression system is activated. On multi-module

units, louvers are used for each intake and exhaust.

Fire Suppression Agent

The fire suppression agent generator is activated by the 24VDC signal from the controller or the heat

detection tubing. Once started, it cannot be stopped. Dry Chemical Agent is ejected into the filter

compartment. The agent interferes with the combustion reaction.

The fire bottle containing the fire suppression agent is mounted outside of the unit.

Additional Sprinkler

An additional sprinkler can be added to the unit to help extinguish fire. A ½” pipe can be found

hanging out of the unit. This pipe routes to the filter compartment side. This pipe allows for additional

water sprinkler to be added to the unit to help extinguish fire and needs to be connected to water

supply.

Liberty WeldCell User Manual, August 2023

Page 32 of 66

F IRE S UPPRESSION P ROCEDURE

In the event of a fire in the filter compartment of the dust collector, follow the following steps:

NOTE: Since January 2020, Clean Air Industries has redundant fire detecting system which will trigger the fire agent regardless of power status. However, it is highly recommended not to shut off power during

fire to allow the whole fire suppression system to work together.

1) Initial Detection

If your unit is equipped with Automatic Fire Suppression, the system is running, and the system is

functioning properly, the fire will be detected by the smoke sensor AND/OR heat detectors. The

system will block the airflow, shut down the power to the motor controls, activate the strobe/horn, and

stop the valves from pulsing. If the primary heat detector has been activated, then the fire bottle will

discharge after 20 seconds. The activating device should be indicated on the panel display.

2) Secondary Detection

If the smoke sensor has tripped, but not a heat sensor, air flow should stop and heat should build up in

the filter compartment. This will cause the secondary heat sensors to trip.

Caution:

In the case of filter misalignment, the smoke sensor will trip, but the heat

sensor will not. This is due to smoke bypass.

3) Tube Heat Detection

If fire is present in the filter compartment, the temperature will rise and melts the tubing and cause the

pressure drop in the tubing. This will trigger the release the fire suppression agent immediately.

4) Manual Detection

If the unit is still operating, immediately locate the manual fire suppression system Fire Pull. Operate

the switch by pulling the lever downward to engage the fire suppression system. The system will block

the airflow, shut down the power to the motor controls and turbo controller, and fill the filter

compartment with suppression agent after 20 seconds.

5) Alert

For safety, immediately follow your plant specified Fire Plan. The system is NOT tied into the plant fire

protection system by Clean Air Industries . Alert officials!

Liberty WeldCell User Manual, August 2023

Page 33 of 66

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