AirSep Centrox PSA Technical manual

AirSep® Corporation

Centrox

PSA Oxygen Concentrator

Instruction Manual

MN124-1 04/10 Rev. -

AirSep® Corporation x 260 Creekside Drive x Buffalo, NY 14228-2075 USA

Phone: [phone] x Fax: [phone] x www.airsep.com

Ownership Data

Take a moment to note important information below about your AirSep CENTROX PSA Oxygen Concentrator. Keep this instruction manual, along with your invoice, to serve as a permanent record of your purchase.

PSA Oxygen Concentrator
Model Number:
		CENTROX
Serial Number:
Invoice Date:
Start-Up Date:
AirSep Representative
Company:
Contact:
Address:
City/Town:			State:		Zip:
Country:			Fax:
Telephone:			Telex:

Before you attempt to install, operate, or repair the oxygen concentrator, read and thoroughly understand this instruction manual. Improper operation can result in severe bodily injury, damage to the system, or poor performance.

AirSep® Corporation

Table of Contents

1.0	Introduction .....................................................................................		1-1
	1.1	General .............................................................................................	1-1
	1.2	Warnings, Cautions, and Notes ........................................................	1-1
	1.3	References to Controls and Indicators with Labels ..........................	1-1

2.0	Safety	................................................................................................	2-1
	2.1	General .............................................................................................	2-1
	2.2	Potential Hazards .............................................................................	2-1
	2.3	Safety Publications ...........................................................................	2-3

3.0	System Description .........................................................................		3-1
	3.1	Introduction .......................................................................................	3-1
4.0	Controls, Parts, and Connections..................................................		4-1
	4.1	Introduction .......................................................................................	4-1
	4.2	Oxygen Concentrator Controls and Indicators..................................	4-1
	4.3	Oxygen Concentrator Parts ..............................................................	4-4
	4.4	Auxiliary Kits Information (Optional) .................................................	4-8
	4.5	Connections....................................................................................	4-10
5.0	Installation .......................................................................................		5-1
	5.1	Unpacking.........................................................................................	5-1
	5.2	Pre-Installation Guidelines................................................................	5-3
	5.3	Installation Instructions .....................................................................	5-4
6.0	Operation .........................................................................................		6-1
	6.1	Initial Start-Up ...................................................................................	6-1
	6.2	Operation ..........................................................................................	6-4
	6.3	Shutdown..........................................................................................	6-5
	6.4	Normal Start-Up................................................................................	6-5
	6.5	Start-Up after an Extended Shutdown ..............................................	6-5

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7.0	Maintenance/Service .......................................................................		7-1
	7.1	Weekly Maintenance ........................................................................	7-2
	7.2	Semi-Annual Maintenance................................................................	7-2
	7.3	Annual Maintenance.........................................................................	7-4
	7.4	Pressure Switch Adjustment Procedure ...........................................	7-5
8.0	Troubleshooting ..............................................................................		8-1
	Troubleshooting Chart..................................................................................		8-2
A	Appendix Technical Data ...............................................................		A-1
B	Appendix Warranty/Returns ..........................................................		B-1
C	Appendix Parts List ........................................................................		C-1
D	Appendix Component Literature ...................................................		D-1

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List of Illustrations

Figure 3.1: CENTROX Oxygen Concentrator ...........................................	3-1
Figure 4.1: Compressor Enclosure...........................................................	4-1
Figure 4.2: PSA Enclosure Controls and Indicators ..............................	4-2
Figure 4.3: Compressor Enclosure Internal Components......................	4-4
Figure 4.4: PSA Enclosure Internal Components....................................	4-5
Figure 4.5: Oxygen Receiver .....................................................................	4-9
Figure 5.1: General Arrangement of the CENTROX concentrator .........	5-5
Figure 6.1: PSA Enclosure Supply Valve Assembly ...............................	6-4
Figure 7.1: Pressure Switch ......................................................................	7-6
Figure A.1: Flow Schematic .....................................................................	A-5
Figure A.2: Wiring Schematic (120 V, 60 Hz) – PSA Enclosure.............	A-6
Figure A.3: Wiring Schematic (220 V, 50 Hz) – PSA Enclosure.............	A-7
Figure A.4: Wiring Schematic (120 V, 60 Hz) – Compressor Encl.........	A-8
Figure A.5: Wiring Schematic (220 V, 50 Hz) – Compressor Encl.........	A-9

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1.0Introduction

1.1 General

This instruction manual provides a description of the AirSep CENTROX Pressure Swing Adsorption (PSA) Oxygen Concentrator as well as instructions for its installation, operation, and maintenance. Pertinent drawings and component information are also included.

To ensure safe operation and proper system maintenance, AirSep Corporation recommends that you keep this instruction manual readily available for reference.

1.2Warnings, Cautions, and Notes

As you read the instruction manual, pay special attention to the Warning, Caution, and Note messages. They identify safety guidelines or other important information as follows:

Provides information that can prevent severe bodily injury or death.

Provides information that can prevent minor bodily injury or property damage.

Provides information important enough to emphasize or repeat.

1.3References to Controls and Indicators with Labels

This operating manual uses uppercase characters (e.g., ON/OFF switch) to refer to controls and indicators. Refer to section 4 for a description of all the controls and indicators of the oxygen concentrator.

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2.0Safety

2.1 General

Oxygen, the most abundant of the elements, makes up about 50 percent of the earth's crust. In its free state, it forms about one-fifth of our air by volume. Although oxygen is classified as a non-flammable gas, it supports combustion. As an active element, it combines directly or indirectly with all elements except the rare gases. It is an invisible gas that is colorless, odorless, and tasteless.

To ensure your safety, thoroughly read and familiarize yourself with this Safety section. AirSep Corporation strongly recommends that you review this section periodically.

2.2Potential Hazards

Before you attempt to install, operate, or repair the CENTROX Oxygen Concentrator, read and thoroughly understand this instruction manual. Improper operation can result in severe bodily injury, damage to the system, or poor performance.

It is recommended to have an alternate source of oxygen supply if a power failure or equipment malfunction occurs.

Take extreme care to keep all the oxygen piping and vessel clean. To avoid a fire or an explosion, oxygen clean all surfaces that can come in contact with oxygen. Check all oxygen fittings/joints for leaks with an oxygen-compatible leak-detecting solution.

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Oxygen vigorously accelerates the burning of combustible materials. In an oxygen-enriched atmosphere, many materials that do not burn in normal air require only a slight spark or moderate heat to set them aflame.

To avoid a fire or an explosion, keep gasoline, kerosene, oil, grease, cotton fibers, paint, and any other combustible material away from any part of the CENTROX Oxygen Concentrator or optional auxiliary oxygen receiver.

Do not smoke or use an open flame near the oxygen concentrator or optional auxiliary oxygen receiver.

Post "NO SMOKING OR OPEN FLAMES" signs in the area where the oxygen concentrator and optional auxiliary oxygen receiver are located. AirSep STRONGLY recommends that only individuals trained and experienced in the safe handling of oxygen operate this system.

The interior of the CENTROX Oxygen Concentrator contains electrical parts that can produce an electrical hazard if not handled properly. To prevent electrical shock, read and thoroughly understand the Troubleshooting section of this instruction manual before you service the system.

Connect the oxygen concentrator power cord to a properly grounded wall outlet on a circuit that cannot be accidentally turned off. Do not use extension cords.

To prevent fire or electrical shock, locate the oxygen concentrator and the auxiliary oxygen receiver (if supplied) indoors away from rain or any other type of moisture.

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Disconnect power before servicing oxygen generator.

2.3Safety Publications

This section is not a complete summary of required safety procedures. Review the following publications for additional information on the safe handling of oxygen:

"Installation of Bulk Oxygen Systems at Consumer Sites;" NFPA No. 50; National Fire Protection Association; 1 Batterymarch Park; P. O. Box 9101; Quincy, Massachusetts 02269-9101 USA.

"Oxygen;" Pamphlet G-4; Compressed Gas Association; 1725 Jefferson Davis Highway; Arlington, Virginia 22202-4102 USA.

"Cleaning Equipment For Oxygen Service," Pamphlet G-4.1; Compressed Gas Association; 1725 Jefferson Davis Highway; Arlington, Virginia 22202-4102 USA.

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3.0System Description

3.1Introduction

Air Contains 21 % oxygen, 78% nitrogen, 0.9% argon, and 0.1% other gases. AirSep Oxygen Concentrator separates this small percentage of the oxygen from the compressed air through a unique Pressure Swing Adsorption (PSA) process.

The CENTROX unit consists of two enclosures. The smaller enclosure contains two compressors that supply air for the process. Each compressor has a dedicated switch and circuit breaker. The cord from the enclosure plugs into the PSA enclosure. This cord must not be plugged into any other power supply outlet. Circuitry inside the PSA enclosure controls the power supplied to the compressors. The power cord from the PSA enclosure plugs into the wall. Figure 3.1 shows the two enclosures of the CENTROX oxygen concentrator.

PSA Enclosure

Compressor

Enclosure

Figure 3.1: CENTROX Oxygen Concentrator

The compressor enclosure (See Figure 3.1) supplies pressurized air to the PSA enclosure (See Figure 3.1). Inside the PSA enclosure, the pressurized air enters the feed & waste manifold (See Figure 4.4). A series of valves in the feed & waste manifold controls the flow of air into each of the adsorber beds (See Figure 4.4). Valves also connect the beds to two mufflers (See Figure 4.4) that allow waste gas to be vented from the beds. The oxygen concentrator uses in its adsorber vessels an inert ceramic material called molecular sieve to separate compressed air into the oxygen and the other gases. The unique properties of molecular sieve allow it to attract, or adsorb, nitrogen physically from air under pressure.

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This allows oxygen to exit the adsorbers as a product gas. Oxygen from top of the beds then flows to the check valve assembly and then to the product manifold (See Figure 4.4). The check valve assembly supplies product oxygen to the flow controller. The product manifold controls the flow of oxygen from one bed to another during various stages of the oxygen generating process. The product oxygen then flows through the product valve to the customer’s application. An oxygen analyzer continuously monitors the purity of oxygen and provides an alarm in case of low purity.

The entire oxygen generating process is completely regenerative, which makes it both reliable and virtually maintenance-free. The molecular sieve does not normally require replacement.

This instruction manual serves as the guidelines for CENTROX oxygen concentrator. Refer to the illustrations, located in the Appendix A of this instruction manual, for the detailed flow diagram and electrical schematic of the oxygen concentrator referenced in this instruction manual.

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4.0Controls, Parts, and Connections

4.1Introduction

The section describes the various parts, controls, indicators and connections required for the CENTROX oxygen concentrator.

4.2Oxygen Concentrator Controls and Indicators

4.2.1 Compressor Enclosure

Figure 4.1 shows the compressor enclosure along with all the controls and indicators.

On/Off

Switch

Circuit Breaker

Reset Buttons

Air Intake

Filters

Hose for

Compressed Air to

PSA Enclosure

Figure 4.1: Compressor Enclosure

ON/OFF (Power) Switch

The individual ON/OFF switches (green color) on the compressor enclosure starts and stops the operation of the oxygen compressors. When you supply power to the system, the green indicator light of the switches turns on. It remains lit whether the switch is in the ON or OFF position (See Figure 4.1).

Circuit Breaker Reset Buttons

The individual circuit breaker reset buttons on the compressor enclosure are used to reset the compressors after an electrical overload shutdown (See Figure 4.1).

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Air Intake Filters

Located on the left side panel, the air intake filter removes any foreign particles from the air that enters the compressor enclosure (See Figure 4.1).

Fuses/Circuit Breakers, if required, must be replaced with the same type and amp rating as the original.

4.2.2 PSA Enclosure

Figure 4.2 shows the controls and indicators of the PSA enclosure.

Feed Air

Pressure Gauge

Product

Low Purity Pressure Gauge

Light

Low Purity

Alarm

Hour Meter

On/Off

(Power) Auto/Manual

Switch

Figure 4.2: PSA Enclosure Controls and Indicators

ON/OFF (Power) Switch

The ON/OFF switch starts and stops the operation of the oxygen concentrator. When you supply power to the system, the switch's green indicator light turns on. It remains lit whether the switch is in the ON or OFF position (See Figure 4.2).

AUTO/MANUAL Switch

The AUTO/MANUAL switch includes an yellow indicator light. In the AUTO position, the concentrator cycles on and off to meet oxygen demand. In the MANUAL position, the concentrator cycles continuously. The concentrator produces oxygen only while the yellow light is lit (See Figure 4.2).

Hour Meter

The hour meter indicates the total number of hours the concentrator has cycled (See Figure 4.2).

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Low Purity Light

The unit is equipped with an oxygen sensor. If the purity supplied to the tank is below 85 % (r 3%), the red light on the PSA enclosure will be on (See Figure 4.2).

Low Purity Alarm

If the purity is below 85 % (r 3%) for more than 30 minutes, an audible alarm will sound (See Figure 4.2).

The low oxygen purity alarm will sound for 4 seconds when the unit is turned on.

FEED AIR PRESSURE Gauge

The FEED AIR PRESSURE gauge indicates the pressure of the feed air before it enters the PSA enclosure (See Figure 4.2).

PRODUCT PRESSURE Gauge

The PRODUCT PRESSURE gauge indicates the pressure of oxygen coming out of the adsorber beds (See Figure 4.2).

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4.3Oxygen Concentrator Parts

Figure 4.3 and Figure 4.4 shows the internal components of the CENTOX oxygen concentrator

4.3.1 Compressor Enclosure

Compressors

Resonators

Heat Exchanger

Coils

Check Valve

Cabinet Fans

Assembly

Figure 4.3: Compressor Enclosure Internal Components

Compressors

The compressors compress the air entering the enclosure before it is supplied to the PSA enclosure (See Figure 4.3).

Cabinet Fans

The cabinet fans provide internal cooling for the air compressor. Fans also help in better circulation of the air inside the compressor enclosure (See Figure 4.3).

Compressor Intake Filter

This filter provides additional filtration for the air as it enters the air compressor. This filter is attached to the gray PVC pipe. The complete assembly of the PVC pipe and the filter is called resonator (See Figure 4.3).

Heat Exchanger

The heat exchanger coils cool the compressed air leaving the compressor enclosure (See Figure 4.3).

Check Valve Assembly

Check Valve assembly prohibits the back flow of compressed air.

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	4.3.2	PSA Enclosure
	Coalescing Filter	Product
		Pressure Gauge
	Product Valve	Check Valve
		Assembly
	Flow Controller	Oxygen
	Product
		Monitor
	Manifold	Board
	Feed Air
	Dump Valve	Equalization
	Check Valve	Valves
		Waste Valves
	Feed Valves	Main Circuit
		Board
	Adsorber Beds	Exhaust
	Pressure Switch	Mufflers
		Oxygen
		Sample
		Regulator

Figure 4.4: PSA Enclosure Internal Components

Adsorber Beds

The adsorbers contain the molecular sieve that adsorbs (attracts) nitrogen from compressed air and allows oxygen to pass through as product gas (See Figure 4.4).

Main Circuit Board

Main circuit board provides signal to all the valves based on the status of the oxygen generator.

Feed Air Dump Valve

The solenoid-operated valve is used to dump the compressed feed air for 3-5 sec at the initial start-up and 1 sec at the start of standby mode. This removes any pressure that builds up inside the compressor to ensure easy start-up.

Check Valve

Check Valve assembly prohibits the back flow of compressed air.

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Feed Valves

The automatic feed air valves control the flow of the feed air as the air enters the adsorbers (See Figure 4.4).

Waste Valves

The automatic waste valves control the flow of waste gas as it exits the adsorbers (See Figure 4.4).

Exhaust Mufflers

The mufflers muffle the noise produced by the waste gas that vents through the beds (See Figure 4.4).

Product Manifold

Product manifold facilitates the oxygen flow across adsorber beds (from top of the adsorber beds) and to the product delivery line.

Equalization Valves

The equalization valves on the product manifold controls the flow of oxygen from one bed to another during various steps of the oxygen generation process (See Figure 4.4).

Check Valves Assembly

The check valve assembly supplies the product oxygen to the flow controller. See Figure 4.4.

Product Pressure Gauge

Product pressure gauge mounted on the check valve assembly (See Figure 4.4) displays the pressure of the product oxygen.

Flow Controller

The flow controller regulates the flow of oxygen (See Figure 4.4).

Product Valve

The valve prevents the supply of oxygen when the unit is in standby mode (Refer to section 6 for the description of different types of mode). See Figure 4.4 for the location of the product valve.

Coalescing Filter

The coalescing filter serves as bacteria filter and removes any bacteria present in the oxygen supply (See Figure 4.4).

Oxygen Monitor Board

The oxygen sensor monitors the purity supplied from the PSA enclosure. If the oxygen purity decreases below the set point, low purity light on the PSA enclosure will be on. If the problem persists for more than 30 minutes, a low purity alarm will sound.

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Oxygen Sample Regulator

A regulator before the oxygen monitor board regulates the pressure to 4-5 psig to the oxygen monitor board. Refer to the section 7 for the regulator adjustment.

Pressure Switch

When the oxygen concentrator operates in Auto mode, the pressure switch monitors the oxygen pressure at the outlet of the oxygen concentrator. When the pressure at the oxygen concentrator outlet increases to the pressure switch upper setpoint, the pressure switch circuit closes and the oxygen concentrator starts a timed shutdown that stops the unit at the end of the shutdown sequence (After 10 additional cycles). When the pressure at the oxygen concentrator outlet decreases to the lower setpoint of the switch, the pressure switch opens to activate the oxygen concentrator and the oxygen production begins. When the oxygen concentrator operates in Manual mode, the pressure switch circuit remains open and the oxygen concentrator cycles continuously. Refer to the appendix A of the manual for lower and upper setpoint settings of the pressure switch.

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4.4Auxiliary Kits Information (Optional)

The items discussed in this section are supplied as ordered. Listed below are the different starter kits available as per the oxygen concentrator ordered.

	Unit #	Kit #		Kit #
		(Customer		(AirSep
		Supplied Tank)		Supplied Tank)
AS074-1	120 VAC/60 Hz	KI470-1		KI470-1
		KI046-1		KI046-1
				TA150-1
AS074-2	220 VAC/50 Hz	KI470-1		KI470-1
		KI046-1		KI046-1
				TA150-1
AS074-3	220 VAC/60 Hz	KI470-1		KI470-1
		KI046-1		KI046-1
				TA150-1

Table 4.1: Optional Starter Kits for the Concentrator Purchased

Kit #	Description	Qty.
KI046-1	Primary/Secondary Ball Valve Assembly	1
	Hose Assembly, Oxygen-clean, (Secondary
KI470-1	Hose)	1
	Regulator-Flowmeter Assembly	1
	Hose Assembly, Oxygen-clean (Main Oxygen
TA150-1	Outlet Hose)	1
	60 Gallon Tank Assembly, O2 Cleaned	1

Table 4.2: Description of the Parts included in the Starter Kits

Please contact AirSep Corporation Sales representative for ordering the starter kits. Below is a brief description of item included in the starter kits.

Primary Oxygen Ball Valve

The primary oxygen ball valve controls the flow of oxygen from the oxygen concentrator to your oxygen distribution system. See Figure 5.1.

Secondary Oxygen Ball Valve

The secondary oxygen ball valve controls the flow of a backup source of oxygen to your oxygen distribution system. This ball valve should always be closed unless a backup source is connected to it. See Figure 5.1.

Regulator-Flowmeter Assembly

This assembly consists of a pressure regulator and a flowmeter. The pressure regulator attaches to the outlet port of the oxygen receiver to regulate the pressure of the oxygen. The flowmeter is used to regulate

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the flow of the oxygen at the outlet of the oxygen receiver. Refer to figure 5.1 for the installation location of this assembly.

Oxygen Isolation Ball Valve Assembly

The oxygen isolation ball valve stops the flow of oxygen to the oxygen receiver during troubleshooting. The oxygen relief valve in the assembly prevents excess pressure from building in the oxygen receiver if a system malfunction occurs. This assembly is shipped mounted on the oxygen receiver. See Figure 4.5.

Main Oxygen Hose

An oxygen-clean hose is provided that connects the outlet of the supply valve assembly (Refer to section 4.5) on the oxygen concentrator to the oxygen isolation ball valve assembly on the oxygen receiver.

Secondary Oxygen Hose

Secondary hose is provided to connect the outlet of the regulatorflowmeter assembly to the inlet of the primary oxygen ball valve. Refer to Figure 5.1.

Oxygen Receiver

The oxygen receiver stores oxygen produced by the oxygen concentrator. It also provides stable flow and purity for short-term surges of oxygen that exceed the rated capacity of the oxygen concentrator.

Oxygen Outlet

Port

Oxygen

Receiver

Main Oxygen

Hose

Oxygen Isolation Ball

Valve Assembly

Figure 4.5: Oxygen Receiver

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4.5Connections

Supply Valve Assembly

This assembly is shipped loose and must be connected to the PSA enclosure oxygen outlet. The supply valve assembly limits the amount of flow to the oxygen receiver during purge. Refer to Figure 5.1 and 6.1.

Power Cord

This power cord and its grounded electrical plug supply power to the CENTROX when connected to a grounded electrical outlet.

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5.0Installation

5.1 Unpacking

AirSep Corporation ships CENTROX Oxygen Concentrators on a wooden skid covered with corrugated cardboard. This container includes an accessory kit with an instruction manual and all the items necessary to properly install the oxygen concentrator. The oxygen receiver (if supplied) is shipped separately. Contact your AirSep Corporation’s Sales representative for ordering the auxiliary kits supplied with the CENTROX oxygen concentrator.

AirSep recommends that you follow these unpacking guidelines carefully to protect yourself against loss from any damage caused during shipment.

1.Inspect the exterior for damage. If you observe any damage, note it on the freight bill or the express receipt before you sign it.

Failure to note exterior damage on the freight bill or the express receipt at the time of delivery can result in the carrier's refusal of a damage claim.

2.Carefully cut and remove any banding straps from the container. Then remove the corrugated cardboard.

Remove the corrugated cardboard very carefully. You may need to return the oxygen concentrator if it was damaged during shipment

3.Remove the oxygen concentrator from the wooden skid.

4.Thoroughly inspect the oxygen concentrator interior and exterior for damage caused during shipment. Pay special attention to the cabinet switches, gauges, brackets, etc.

5.Remove the accessory kit and inspect the contents for damage.

6.Although the CENTROX is carefully inspected, tested, and packed, it can be damaged during shipment due to improper handling. If you find any concealed damage (loss or damage not found until the

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concentrator is unpacked), immediately call the delivery carrier and file a concealed-damage claim. Keep ALL container material and interior packing for the carrier's inspection.

YOU MUST MAKE A CONCEALED-DAMAGE CLAIM WITHIN 24 HOURS OF DELIVERY. Only the consignee can file this claim.

Follow these unpacking guidelines carefully to protect yourself against loss from any damage caused during shipment.

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5.2Pre-Installation Guidelines

Before you install the CENTROX oxygen concentrator, and the oxygen receiver, if supplied, refer to the Specifications section in the Appendix of this instruction manual to determine the applicable space, and the power requirements for your particular model.

A backup source of oxygen must be available if a power failure or system malfunction occurs.

Make sure the area that surrounds the oxygen concentrator is well ventilated, and provide sufficient space around the unit [at least three feet] to allow for cool air flow as well as to allow safe operation and maintenance.

Locate the oxygen concentrator in an area where the ambient air temperature remains between 4qC (40qF) and 44qC (112qF) to prevent damage not covered under the AirSep Corporation Product Warranty.

Connect the oxygen concentrator power cord only to a properly grounded electrical outlet on a circuit that cannot be accidentally turned off. Do not use extension cords.

Provide proper voltage to the oxygen concentrator to prevent damage not covered under the AirSep Product Warranty.

Do not plug in the power cord until you complete the installation of the oxygen concentrator.

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5.3Installation Instructions

To assure proper installation and safe operation of your CENTROX PSA Oxygen Concentrator, AirSep Corporation recommends that you review this entire section before you attempt to install the unit.

Do not turn off power to any component unless you are sure the medical facility does not require any oxygen, or there is a sufficient alternative/backup source of oxygen.

Before you attempt to install, operate, or repair the oxygen concentrator, read and thoroughly understand this instruction manual. Improper operation can result in severe bodily injury, damage to the system, or poor performance.

Refer to the Figure 5.1 as you follow the installation instructions:

1.Place the oxygen concentrator near the inlet of your oxygen distribution system.

2.Mount both the enclosures securely to a wall, ensuring that there is a minimum of two feet between the two enclosures and minimum of three feet between the compressor enclosure and a wall. The compressor enclosure can be on either side of the PSA enclosure.

3.Open the compressor enclosure and remove the tie wrap from each compressor. The tie wrap holds the compressor to a bracket support for shipping purpose.

4.Attach the red air hose from the compressor enclosure to the fitting on the left hand side of the PSA enclosure (See Figure 4.5 and 5.1).

The supply valve assembly at the outlet of the oxygen concentrator has a small hole drilled in it and allows a controlled amount of flow during purging process (See Section 6) of the 60 gallon tank (If supplied).

5.Mount the supply valve assembly (shipped loose) at the outlet of the PSA enclosure. Refer to Figure 5.1 and 6.1.

6.Attach the main oxygen hose from the supply valve to the inlet of the oxygen isolation ball valve assembly at the oxygen tank (See Figure 4.5 and 5.1).

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