May 04, 2022

INVITATION TO BID:

BL056-22

The Gwinnett County Board of Commissioners is soliciting competitive sealed bids from qualified suppliers for the Purchase of Bauer Air Compressors for the Department of Fire and Emergency Services.

Bids should be typed or submitted in ink and returned in a sealed container marked on the outside with the BL# and Company Name. Bids will be received until 2:50 P.M. local time on May 25, 2022 at the Gwinnett County Purchasing Division, 75 Langley Drive, Lawrenceville, Georgia 30045. Any bid received after this date and time will not be accepted. Bids will be publicly opened and read at 3:00 P.M. Apparent bid results will be available the following business day on our website www.gwinnettcounty.com.

Questions regarding bids should be directed to Lindsey Gravitt, Purchasing Associate II, at lindsey.gravitt@gwinnettcounty.com , or by phone at 770-822-7833 no later 3:00 P.M. May 13, 2022. Bids are legal and binding upon the bidder when submitted. All bids should be submitted in duplicate.

Gwinnett County does not discriminate on the basis of disability in the admission or access to its programs or activities. Any requests for reasonable accommodations required by individuals to fully participate in any open meeting, program or activity of Gwinnett County Government should be directed to the ADA Coordinator at the Gwinnett County Justice and Administration Center, 770-822-8165.

The written bid documents supersede any verbal or written prior communications between the parties.

Award will be made to the supplier submitting the lowest responsive and responsible bid. Gwinnett County reserves the right to reject any or all bids, to waive technicalities and to make an award deemed in its best interest. Bids may be split or awarded in entirety. Gwinnett County reserves the option to negotiate terms, conditions and pricing with the lowest responsive, responsible bidder(s) at its discretion

Award notification will be posted after award on the County website, www.gwinnettcounty.com and companies submitting a bid will be notified via email.

We look forward to your bid and appreciate your interest in Gwinnett County.

Lindsey Gravitt

Purchasing Associate II

The following pages should be returned in duplicate as your bid: Bid Schedule, Pages 4-23 References, Page 24 Ethics Affidavit, Page 25 http://www.gwinnettcounty.com/ mailto:lindsey.gravitt@gwinnettcounty.com

BL056-22 Page 2

SPECIFICATIONS

A. General Purpose Gwinnett County is seeking competitive sealed bids for the Purchase of Bauer Air Compressors for the Department of Fire and Emergency Services.

B. Award

Award will be made to the supplier submitting the lowest responsive and responsible bid. Gwinnett County reserves the right to reject any or all bids, to waive technicalities, and to make an award deemed in its best interest. Gwinnett County is unable to accept refurbished equipment for this solicitation.

C. Ordering

Following bid award, purchase orders will be placed directly to the successful supplier, by the Gwinnett County Department of Fire and Emergency Services.

D. Unit Price

Unit Price MUST include all costs associated with this purchase including delivery, installation, set-up, and initial startup.

E. Supplier Requirements Awarded vendor must be an authorized distributor and service center for Bauer Compressor Products.

F. SOLE SOURCE PRODUCTS

Substitutes will NOT be accepted. These items have been approved as a “standard” after completing a rigorous approval process. Therefore, suppliers are to quote exact item requested.

G. References

A minimum of three (3) references that can provide information regarding company’s products and service should be listed on the included reference sheet.

H. Termination for Cause

The County may terminate this agreement for cause upon ten days prior written notice to the contractor of the contractor’s default in the performance of any term of this agreement. Such termination shall be without prejudice to any of the County’s rights or remedies by law.

I. Termination for Convenience

The County may terminate this agreement for its convenience at any time upon 30 days written notice to the contractor. In the event of the County’s termination of this agreement for convenience, the contractor will be paid for those services actually performed. Partially completed performance of the agreement will be compensated based upon a signed statement of completion to be submitted by the contractor, which shall itemize each element of performance.

BL056-22 Page 3

Please note areas with ** for additional Components and Accessories requested by Gwinnett Fire & Emergency Services

Specification for a breathing air station to refill self-contained breathing apparatus (SCBA) cylinders with purified air that meets or exceeds the requirements of CGA Pamphlet G-7, Compressed Air for Human Respiration, the requirements of ANSI/CGA G-7.1, Commodity Specification for Air, Grade E, and all other recognized standards for respirable air. The Manufacturer shall operate under a Quality Management System which complies with the requirements of ISO 9001:2015 for the design, manufacture, inspection, test, and service of air & gas compressors and associated spare parts for commercial and military applications. All equipment shall be new and of current design and manufacture. Used or refurbished equipment is unacceptable. Specifications are subject to change without notice.

BAUER MODEL

UN4/13H

UNICUS 4

6000 PSI SERVICE

The breathing air station shall be supplied on a steel base frame of welded construction. The frame shall be designed for both the static and dynamic loads of the system and of sufficient size to adequately accommodate all the station’s components. The compressor, purification system, fill station and all tubing shall be incorporated into an appliance-like enclosure complete with sound attenuation. The enclosure panels shall be equipped with a slam-action latches and lift-off hinges making it simple to facilitate inspection and maintenance. The UN4 enclosure and base frame shall be finished with a baked on polyester powder coat paint for the ultimate in durability, corrosion resistance, and long life.

The station shall be designed for against-the-wall installation, operation and maintenance, and single-point operator control from the front of the station. The design of the station shall permit unrestricted cooling air flow to the compressor and motor when installed against a wall. All system instrumentation, controls and access to the containment fill station shall be located at the front of the station. The depth of the fill station portion of the Unicus 4 is adjustable, thereby allowing the Unicus 4 to fit through a standard 36” doorway. The station shall be designed for continuous duty operation indoors with room temperatures ranging between 40°F and 115°F. Installation shall not require a special foundation;

however, it is the responsibility of the purchaser to ensure the installation site has a solid and level foundation that can support the weight of the station, the availability of a qualified source of air for the intake of the compressor and adequate ventilation.

All piping and tubing shall be properly supported and protected to prevent damage from vibration during shipment, operation, or maintenance. Piping and tubing shall be installed in a neat and orderly arrangement, adapting to the contours of the station. All instrument tubing shall be 300 series stainless steel.

The station shall be warranted free from defects in material and workmanship for a period of twenty-four [24] months from date of shipment or twelve months from date of start-up, whichever expires first. The

BL056-22 Page 4 warranty shall not impose limitations on the station’s accumulated operating hours during the warranty period.

Performance Table

Model FAD1

SCFM

Charging Rate2

SCFM

HP RPM Compressor Model

Purification System

Air Processing Capability3

(cu ft) UN4/13H 10.8 13.0 10.0 1420 K12.14 II P2 Securus 67,000

Table 2

SCBA Fills in 1st Hour From 2 ASME From 4 ASME

Model

2216 PSI

45 cu ft

4500 PSI

45 cu ft

2216 PSI

45 cu ft

4500 PSI

45 cu ft

UN4/13H 38 25 63 45

The number of SCBA fills in 1st hour is calculated by using the following formula:

FAD x 60 min/hr + SCBA fills from storage4

(SCBA volume at fill pressure) - (SCBA volume at 500

PSIG)

Compressor

The compressor shall be an air-cooled, oil lubricated, four stage, three cylinder, reciprocating compressor. The crankcase shall be cast of a high strength, aluminum alloy. The crankshaft shall be of a single piece Nodular Graphite Iron construction and supported in the crankcase by three long-life roller bearings. The connecting rods shall be of single piece design with stages 1, 2 & 3 being of high strength aluminum alloy construction and the 4th stage being of forged steel construction. Each connecting rod shall incorporate a roller bearing at the crank end and needle bearing at the pin end.

The pistons shall be constructed of an aluminum alloy. Piston rings on the second and third stage are of cast iron; first and fourth stage rings shall be of a high strength polyamide. The final stage shall incorporate a ringed, free-floating, aluminum piston, which is driven by a guide piston and the previous stage’s discharge pressure. The cylinders shall be of cast iron construction with deep cooling fins on the external surface for optimum heat dissipation. The cylinders shall be arranged in a “W” configuration with the first and second stage sharing one common stepped cylinder. Each cylinder shall be located directly in the cooling fan’s blast. The cylinders shall be

1 Based on standard inlet conditions.

2 Based on recharging an 80-cu ft cylinder from 500 to 3000 PSIG.

3 Based on an inlet temperature of 68°F.

4 Reference the Bauer Fillagraph for number of fills from storage.

BL056-22 Page 5 removable from the crankcase. The compressor’s flywheel shall be of cast iron construction. A multi-wing, high velocity cooling fan shall be integral to the flywheel.

An intercooler shall be provided after each stage of compression and an aftercooler shall be provided after the final stage of compression. The coolers shall be individually detachable from the compressor, located directly in the cooling fan’s blast and made of a stainless steel. The aftercooler shall be designed to cool the discharge air to within 18°F of ambient temperature. A cool-down cycle shall not be required prior to stopping the compressor.

A separator shall be supplied after the second and third stages of compression, and a coalescing separator shall be supplied at the discharge of the compressor. A unique “zero loss” automatic condensate drain (ACD) system shall be supplied for all the separators. The system shall purge the separators on a timed event, approximately every fifteen minutes yet significantly decrease the interstage and final separator pressure drop as found on other brands. The reduction in pressure loss shall allow the compressor to reach maximum operating pressure quicker. Additionally, during the blow down cycle, radiant noise levels shall be significantly reduced and tubing to the A.C.D. manifold and collection reservoir are significantly reduced. The ACD system shall unload the compressor on shutdown for unloaded restart. An exhaust muffler and condensate reservoir shall be supplied. Manually operated valves shall be supplied to override the automatic operation of the ACD system for test and maintenance purposes.

The compressor shall be lubricated by a combination splash /mist and low-pressure lubrication system.

The final stage of compression shall be lubricated by a pressurized lubrication circuit. The other stages and the driving gear shall be splash/mist lubricated. The low-pressure lubrication circuit shall include a positive displacement oil pump, gear driven by the crankshaft, a non-adjustable oil pressure regulator, and a full-flow oil filter with replaceable element. A highly visible sight glass shall be included to check the oil level. The oil drain for the compressor shall be piped to the outside of the frame.

The compressor shall be equipped with an inlet filter with replaceable particulate element.

**Prime Mover and V-Belt Drive

**The single-phase electric motor (240 volt) shall be of the T.E.F.C. Totally Enclosed Fan Cooled) design. The motor voltage and frequency shall be specified by the purchaser. The compressor and motor shall be mounted on a common base that is vibration isolated from the station’s main frame.

The compressor and motor shall be arranged in a vertical design. Power from the motor shall be transmitted to the compressor by a v-belt drive. The v-belt drive shall be designed to tension the drive belts automatically. Rotation arrows shall be affixed in a conspicuous place on the compressor.

Electrical Control & Instrumentation

The compressor control panel (CCP) shall include an across-the-line magnetic motor starter, industrial power supply and PLC controller. The CCP shall be built in accordance with UL 508A, the standard for Industrial Control Panels and shall be affixed with a UL label.

The PLC compressor control system consists of a programmable logic controller for the monitoring, protection, and control of the compressor systems.

Standard features of the CCP include:

BL056-22 Page 6

– A NEMA type 4 electrical enclosure

– UL electrical panel

– Human Machine Interface (HMI) with Multi-Color Touch Screen Display incorporating vivid TFT

(Thin Film Transistor) Technology and NOT limited by touch cells (Optional mounting configurations available-up to 25 ft remote)

– Emergency Stop Palm Button

– Home screen customizable with distributor contact information

– Real Time Clock (time and date)

– Compressor on / off

– Digital Display of Compressor Final Pressure

– Digital Display of Compressor Oil Pressure

– Digital Display of current Compressor Run Time

– Digital Display of Final Separator Cycle Count

– Compressor High Temperature Shutdown and Alarm

– Full support of the Automatic Condensate Drain system (interval and duration set points adjustable thru the HMI - password protected)

- Digital Display of time to next ACD Cycle

- Condensate Drain Reservoir full alarm

– Full support of CO monitor alarm functions (optional)

– Full support of SECURUS purification system moisture monitor warning and alarm functions

– Built in overtime timer set at 5 hours - optional times available

– Maintenance Timer (selectable between real time or compressor run time) to give Digital Display of all needed Preventative Maintenance Evolutions

– Motor overload alarm

– Non-resettable hour meter

– Recoverable Run History (last 5 run periods)

– Recoverable Alarm History (last 5 fault shutdowns)

– Support of up to 5 Languages (to be specified at time of order; includes English, French, Spanish

& Portuguese)

– Operator choice of display in BAR or PSI

For ease of Maintenance and Repair:

- PLC has removable Terminal Blocks for all functions

- Diagnostic EEPROM (Electrically Erasable Programmable Read-Only Memory) Capability

- Support of Two (2) Communication Protocols (optional) o Ethernet Connection o Analog Phone Modem

- Wiring shall be encapsulated within a split corrugated type loom. Each wire end connection shall be machine crimped and numbered.

The HMI shall have 22 adjustable system parameters secured by password protection. The HMI will provide display of all safety / fault shutdowns with a text read-out of up to three potential causes for the fault / shutdown.

The compressor oil pressure shall be monitored by a pressure transmitter and digitally displayed on HMI.

The compressor shall shut down and a fault will be indicated on the HMI should the compressor’s oil

BL056-22 Page 7 pressure drop below the factory preset value during operation. The oil pressure transmitter shall be by-passed during start-up to permit the oil pump to achieve the normal operating pressure.

The low oil pressure and final air pressure transmitters shall be equipped with sealed electrical connectors. The analog pressure sensors for oil pressure and final pressure shall have adjustable set point and dead-band thru the HMI (password protected).

A temperature switch shall be supplied on the head of the final stage of compression. The compressor shall shutdown and a fault will be indicated on the HMI should the final stage temperature exceed the tamper-proof set point during operation.

Fault shutdowns shall not affect the ability to fill SCBA cylinders from the storage system if there is sufficient pressure in the storage to fill them.

Purification System

The purification system shall purify high pressure air to a quality that meets or exceeds the requirements of CGA Pamphlet G-7, Compressed Air for Human Respiration, ANSI/CGA G-7.1, Commodity Specification for Air, Grade E, and all other recognized standards for breathing air. Purification shall be achieved by mechanical separation of condensed oil and water droplets, adsorption of vaporous water by a desiccant, adsorption of oil vapor and elimination of noxious odors by activated carbon and conversion of carbon monoxide to respirable levels of carbon dioxide by catalyst.

The high-pressure purification chamber shall have a working pressure of 6000 PSIG. The purification system shall utilize a replaceable cartridge. The purification system shall be designed so that the replacement of the cartridge can be accomplished without disconnecting system piping. The design of the chamber shall preclude the possibility of operating the system without the cartridge installed or with an improperly installed cartridge. A bleed valve shall be provided to vent the purification system to facilitate replacing the cartridge. A pressure maintaining valve and a check valve shall be supplied downstream of the purification system to increase the efficiency of the purification system by maintaining a positive back pressure. A check valve shall be supplied between the coalescing separator on the compressor’s discharge line and the purification system to maintain the positive pressure in the purification system when the compressor shuts down.

The purification system shall include Bauer’s patented Securus Electronic Moisture Monitor System. A sensor shall be located in the Securus purifier cartridge for direct monitoring of moisture levels. The Touch Screen Display shall indicate the status of the Securus cartridge. The Securus system shall warn the operator, in advance, of the impending expiration of the Securus cartridge via a scrolling text display message on the panel mounted operator / compressor interface. The compressor shall shut down automatically and the operator notified via audible alarm and scrolling text display message on the panel mounted operator / compressor interface should the operator fail to change the Securus cartridge within the warning period. The compressor shall not be capable of restarting until the used cartridge is replaced with a new one5. The moisture monitoring system shall be of a fail-safe design. Should the electrical contact between the display module and sensor be disconnected, an immediate fault shut down shall be effected. For absolute safety and highest quality breathing air, no manual override shall be supplied for the moisture monitor.

5 Replace all cartridges at the same time.

BL056-22 Page 8

Cascade Fill Control / Instrument Panel

A steel instrument panel affixed with a non-glare Lexan→ overlay shall be installed on the front of the station. The overlay shall contain an embedded airflow schematic. The cascade fill control / instrument panel shall be hinged for easy maintenance and accessibility.

The cascade control panel shall be factory piped for four storage banks and designed to fill three SCBA cylinders either independently or simultaneously. The control panel shall include, at a minimum, a manual control valve and pressure gauge for each storage bank, an adjustable regulator for SCBA cylinder fill pressure complete with a pressure gauge for inlet and regulated pressure and a relief valve to protect the SCBA cylinders from overfilling, a manual control valve and pressure gauge for each fill position, a manual direction valve to allow the operator to select SCBA filling from either air storage or the compressor, provisions for factory or field modification to allow a different fill pressure at each fill position. The cascade system shall allow the simultaneous tasks of filling one storage bank while drawing down another during the SCBA fill process. Strategically placed tees and check valves preclude the need for individual “To” and “From” valves. Systems requiring individual “To” and “From” valves shall not be deemed acceptable, as they require more efforts to operate.

All control panel mounted pressure gauges shall have a 2 ½” diameter and be liquid filled. A fluorescent light shall be factory installed above the panel to provide a glare-free illumination of the control panel. An on/off switch shall be integrated into the operator / compressor interface for the light.

Air Storage

The air storage system shall include two receivers fabricated, tested, and stamped in accordance with Section VIII of the ASME Boiler and Pressure Vessel Code. The receivers shall have a 3:1 safety factor at 6000 PSIG (7000 PSIG MAWP at 200°F).6 Each receiver shall have a capacity of 491 cu ft at 6000 PSIG7. The receivers shall be mounted in a vertical configuration in a rack that is integral to the breathing air station’s frame. The rack shall be designed to accommodate four identical receivers. The receivers shall be installed in accordance with 29 CFR 1910.169. The rack shall be designed to support the receivers in a secure manner and permit visual inspection of the receivers’ external surface. Each receiver shall be supplied with a manual drain valve, an isolation valve and safety relief valve. For ease of maintenance and periodic inspection all the drain valves shall be piped to one convenient location within the Unicus 4 enclosure. Each receiver, or bank of receivers if additional storage is required, shall be piped to the cascade fill control panel to facilitate cascade filling.

**Containment Fill Station

The front-loading, three position; containment fill station shall totally enclose the SCBA or SCUBA8 cylinders during the refilling process.

6 UN storage systems available.

7 Capacity referenced to 70°F.

8 SCUBAs up to 31” maximum overall length including valve, boot, and fill yoke.

BL056-22 Page 9

The fill station’s outer enclosure and door assemblies shall be constructed of formed ¼ inch thick plate steel. Venting shall be provided in the bottom of the fill station to allow the rapidly expanding air from a ruptured cylinder to escape from the fill station. The fill station shall be ergonomically designed for maximum operator convenience and safety for refilling cylinders. The fill station door and cylinder holder assembly shall tilt out towards the operator 45 degrees, providing unobstructed access to the cylinder holder to load and unload the cylinders. A chrome plated handle and heavy-duty gas spring shall be incorporated into the design of the fill station to assist the operator in opening and closing the fill station door. It shall take no more than approximately eighteen pounds of force to open or close the fill station door thereby eliminating operator fatigue.

Each cylinder holder shall be lined to prevent scuffing the outer surface of the SCBA cylinders. For complete operator protection, the fill station shall include a safety interlock system that will prevent refilling SCBA cylinders unless the fill station door is closed and secured in the locked position. The automatic interlock will require no actuation of secondary latching mechanism on the outside of the fill station.

**Three fill hoses shall be located within the fill station. Each fill hose shall be equipped with a stainless-steel bleed valve and stainless-steel SCBA fill adapter of choice. Fill hose retainers shall be provided to anchor the fill hoses when not in use.

Testing and Preparation for Shipment

The breathing air station shall be tested by the manufacturer prior to shipment

A manufacturer’s nameplate shall be placed on the interior of the electric panel. The nameplate shall include, at a minimum, manufacturer’s name, model number, serial number, compressor block number, and date of manufacture. Voltage, phase / frequency, and amperage are located on another label inside the electrical panel

The station shall be suitably prepared for motor freight transport. The station shall be bolted to a wooden pallet, wrapped in sheet plastic, and fully protected by a wooden crate. The compressor intake and similar openings shall be suitably covered. Component parts, loose parts or associated spare parts shall be packaged separately and shipped on the same pallet if feasible.

Documentation

A documentation package shall be supplied with the station. The documentation package shall include, at a minimum, an operation manual on CD, recommended spare parts list, warranty information and a start-up/warranty registration form.

The Operator’s Instruction and Maintenance Manual for the breathing air station shall be as detailed as possible, outlining all operation and maintenance instructions. The manual shall include detailed illustrated drawings for the compressor block and all system components along with a complete parts listing for all illustrated components. Warnings and safety precautions shall be identified clearly in the manual.

**Installation, Set-up, and Initial Startup

**Gwinnett Fire & Emergency Services will provide an electrical disconnect with a minimum of 15 feet of wire from the electrical disconnect for connection to the compressor.

BL056-22 Page 10

**The successful service provider will complete installation and set-up of the breathing air compressor in a location approved by Gwinnett Fire & Emergency Services.

** The successful service provider will complete the initial startup and testing of purified air that meets or exceeds the requirements of CGA Pamphlet G-7, Compressed Air for Human Respiration, the requirements of ANSI/CGA G-7.1, Commodity Specification for Air, Grade E, and all other recognized standards for respirable air.

**Accessories to be Included

The following shall be included by the manufacturer as accessories to the breathing air station:

− **leveling feet and securing brackets (no charge option) − **Two additional ASME receivers − **Carbon monoxide monitor with calibration kit − **Remote Fill with regulator, pressure gauge, line valve, and cabinet enclosed hose reel with 100 ft of high-pressure 6000 psi hose

BL056-22 Page 11

Specification for a breathing air station to refill self-contained breathing apparatus (SCBA) cylinders with purified air that meets or exceeds the requirements of CGA Pamphlet G-7, Compressed Air for Human Respiration, the requirements of ANSI/CGA G-7.1, Commodity Specification for Air, Grade E, and all other recognized standards for respirable air. The Manufacturer shall operate under a Quality Management System which complies with the requirements of ISO 9001:2015 for the design, manufacture, inspection, test, and service of air & gas compressors and associated spare parts for commercial and military applications. All equipment shall be new and of current design and manufacture. Used or refurbished equipment is unacceptable. Specifications are subject to change without notice.

UN4/25H-E3

The breathing air station shall be supplied on a steel base frame of welded construction. The frame shall be designed for both the static and dynamic loads of the system and of sufficient size to adequately accommodate all the station’s components. The compressor, purification system, fill station and all tubing shall be incorporated into an appliance-like enclosure complete with sound attenuation. The enclosure panels shall be equipped with a slam-action latches and lift-off hinges making it simple to facilitate inspection and maintenance. The UN4 enclosure and base frame shall be finished with a baked on polyester powder coat paint for the ultimate in durability, corrosion resistance, and long life.

The station shall be designed for against-the-wall installation, operation and maintenance, and single-point operator control from the front of the station. The design of the station shall permit unrestricted cooling air flow to the compressor and motor when installed against a wall. All system instrumentation, controls and access to the containment fill station shall be located at the front of the station. The depth of the fill station portion of the Unicus 4 is adjustable, thereby allowing the Unicus 4 to fit through a standard 36” doorway. The station shall be designed for continuous duty operation indoors with room temperatures ranging between 40°F and 115°F. Installation shall not require a special foundation;

however, it is the responsibility of the purchaser to ensure the installation site has a solid and level foundation that can support the weight of the station, the availability of a qualified source of air for the intake of the compressor and adequate ventilation.

All piping and tubing shall be properly supported and protected to prevent damage from vibration during shipment, operation, or maintenance. Piping and tubing shall be installed in a neat and orderly arrangement, adapting to the contours of the station. All instrument tubing shall be 300 series stainless steel.

The station shall be warranted free from defects in material and workmanship for a period of twenty-four [24] months from date of shipment or twelve months from date of start-up, whichever expires first. The

BL056-22 Page 12 warranty shall not impose limitations on the station’s accumulated operating hours during the warranty period.

Performance Table

Model FAD9

SCFM

Charging Rate10

SCFM

HP RPM Compressor Model

Purification System

Air Processing Capability

11 (cu ft) UN4/25H-E3 21.0 25.2 20.0 1300 K18.1 II P5 Securus 150,000

Table 2

SCBA Fills in 1st Hour From 2 ASME From 4 ASME

Model

2216 PSI

45 cu ft

4500 PSI

45 cu ft

2216 PSI

45 cu ft

4500 PSI

45 cu ft

UN4/25H-E3 56 40 81 60

The number of SCBA fills in 1st hour is calculated by using the following formula:

FAD x 60 min/hr + SCBA fills from storage12

(SCBA volume at fill pressure) - (SCBA volume at 500

PSIG)

Compressor

The compressor shall be an air-cooled, oil lubricated, four stage, three cylinder, reciprocating compressor. The crankcase shall be cast of a high strength, aluminum alloy. The crankshaft shall be of a single piece Nodular Graphite Iron construction and supported in the crankcase by three long-life roller bearings. The connecting rods shall be of single piece design with stages 1, 2 & 3 being of high strength aluminum alloy construction and the 4th stage being of forged steel construction. Each connecting rod shall incorporate a roller bearing at the crank end and needle bearing at the pin end.

The pistons shall be constructed of an aluminum alloy. Piston rings on the second and third stage are of cast iron; first and fourth stage rings shall be of a high strength polyamide. The final stage shall incorporate a ringed, free-floating, aluminum piston, which is driven by a guide piston and the previous stage’s discharge pressure. The cylinders shall be of cast iron construction with deep cooling fins on the external surface for optimum heat dissipation. The cylinders shall be arranged in a “W” configuration with the first and second stage sharing one common stepped cylinder. Each cylinder shall be located directly in the cooling fan’s blast. The cylinders shall be removable from the

1 Based on standard inlet conditions.

2 Based on recharging an 80 cu ft cylinder from 500 to 3000 PSIG.

3 Based on an inlet temperature of 68°F.

4 Reference the Bauer Fillagraph for number of fills from storage.

BL056-22 Page 13 crankcase. The compressor’s flywheel shall be of cast iron construction. A multi-wing, high velocity cooling fan shall be integral to the flywheel.

An intercooler shall be provided after each stage of compression and an aftercooler shall be provided after the final stage of compression. The coolers shall be individually detachable from the compressor, located directly in the cooling fan’s blast and made of a stainless steel. The aftercooler shall be designed to cool the discharge air to within 18°F of ambient temperature. A cool-down cycle shall not be required prior to stopping the compressor.

A separator shall be supplied after the second and third stages of compression, and a coalescing separator shall be supplied at the discharge of the compressor. A unique “zero loss” automatic condensate drain (ACD) system shall be supplied for all the separators. The system shall purge the separators on a timed event, approximately every fifteen minutes yet significantly decrease the interstage and final separator pressure drop as found on other brands. The reduction in pressure loss shall allow the compressor to reach maximum operating pressure quicker. Additionally, during the blow down cycle, radiant noise levels shall be significantly reduced and tubing to the A.C.D. manifold and collection reservoir are significantly reduced. The ACD system shall unload the compressor on shutdown for unloaded restart. An exhaust muffler and condensate reservoir shall be supplied. Manually operated valves shall be supplied to override the automatic operation of the ACD system for test and maintenance purposes.

The compressor shall be lubricated by a combination splash /mist and low-pressure lubrication system.

The final stage of compression shall be lubricated by a pressurized lubrication circuit. The other stages and the driving gear shall be splash/mist lubricated. The low-pressure lubrication circuit shall include a positive displacement oil pump, gear driven by the crankshaft, a non-adjustable oil pressure regulator, and a full-flow oil filter with replaceable element. A highly visible sight glass shall be included to check the oil level. The oil drain for the compressor shall be piped to the outside of the frame.

The compressor shall be equipped with an inlet filter with replaceable particulate element.

Prime Mover and V-Belt Drive

The three-phase electric motor shall be of the T.E.F.C. (Totally Enclosed Fan Cooled) design. The motor voltage and frequency shall be specified by the purchaser. The compressor and motor shall be mounted on a common base that is vibration isolated from the station’s main frame. The compressor and motor shall be arranged in a vertical design. Power from the motor shall be transmitted to the compressor by a v-belt drive. The v-belt drive shall be designed to tension the drive belts automatically.

Rotation arrows shall be affixed in a conspicuous place on the compressor.

Electrical Control & Instrumentation

The compressor control panel (CCP) shall include an across-the-line magnetic motor starter, industrial power supply and PLC controller. The CCP shall be built in accordance with UL 508A, the standard for Industrial Control Panels and shall be affixed with a UL label.

The PLC compressor control system consists of a programmable logic controller for the monitoring, protection, and control of the compressor systems.

BL056-22 Page 14

Standard features of the CCP include:

– A NEMA type 4 electrical enclosure

– UL electrical panel

– Human Machine Interface (HMI) with Multi-Color Touch Screen Display incorporating vivid TFT

(Thin Film Transistor) Technology and NOT limited by touch cells (Optional mounting configurations available-up to 25 ft remote)

– Emergency Stop Palm Button

– Home screen customizable with distributor contact information

– Real Time Clock (time and date)

– Compressor on / off

– Digital Display of Compressor Final Pressure

– Digital Display of Compressor Oil Pressure

– Digital Display of current Compressor Run Time

– Digital Display of Final Separator Cycle Count

– Compressor High Temperature Shutdown and Alarm

– Full support of the Automatic Condensate Drain system (interval and duration set points adjustable thru the HMI - password protected)

- Digital Display of time to next ACD Cycle

- Condensate Drain Reservoir full alarm

– Full support of CO monitor alarm functions (optional)

– Full support of SECURUS purification system moisture monitor warning and alarm functions

– Built in overtime timer set at 5 hours - optional times available

– Maintenance Timer (selectable between real time or compressor run time) to give Digital Display of all needed Preventative Maintenance Evolutions

– Motor overload alarm

– Non-resettable hour meter

– Recoverable Run History (last 5 run periods)

– Recoverable Alarm History (last 5 fault shutdowns)

– Support of up to 5 Languages (to be specified at time of order; includes English, French, Spanish

& Portuguese)

– Operator choice of display in BAR or PSI

For ease of Maintenance and Repair:

- PLC has removable Terminal Blocks for all functions

- Diagnostic EEPROM (Electrically Erasable Programmable Read-Only Memory) Capability

- Support of Two (2) Communication Protocols (optional) o Ethernet Connection o Analog Phone Modem

- Wiring shall be encapsulated within a split corrugated type loom. Each wire end connection shall be machine crimped and numbered.

The HMI shall have 22 adjustable system parameters secured by password protection. The HMI will provide display of all safety / fault shutdowns with a text read-out of up to three potential causes for the fault / shutdown.

BL056-22 Page 15

The compressor oil pressure shall be monitored by a pressure transmitter and digitally displayed on HMI.

The compressor shall shut down and a fault will be indicated on the HMI should the compressor’s oil pressure drop below the factory preset value during operation. The oil pressure transmitter shall be by-passed during start-up to permit the oil pump to achieve the normal operating pressure.

The low oil pressure and final air pressure transmitters shall be equipped with sealed electrical connectors. The analog pressure sensors for oil pressure and final pressure shall have adjustable set point and dead-band thru the HMI (password protected).

A temperature switch shall be supplied on the head of the final stage of compression. The compressor shall shutdown and a fault will be indicated on the HMI should the final stage temperature exceed the tamper-proof set point during operation.

Fault shutdowns shall not affect the ability to fill SCBA cylinders from the storage system if there is sufficient pressure in the storage to fill them.

Purification System

The purification system shall purify high pressure air to a quality that meets or exceeds the requirements of CGA Pamphlet G-7, Compressed Air for Human Respiration, ANSI/CGA G-7.1, Commodity Specification for Air, Grade E, and all other recognized standards for breathing air. Purification shall be achieved by mechanical separation of condensed oil and water droplets, adsorption of vaporous water by a desiccant, adsorption of oil vapor and elimination of noxious odors by activated carbon and conversion of carbon monoxide to respirable levels of carbon dioxide by catalyst.

The high-pressure purification chamber shall have a working pressure of 6000 PSIG. The purification system shall utilize a replaceable cartridge. The purification system shall be designed so that the replacement of the cartridge can be accomplished without disconnecting system piping. The design of the chamber shall preclude the possibility of operating the system without the cartridge installed or with an improperly installed cartridge. A bleed valve shall be provided to vent the purification system to facilitate replacing the cartridge. A pressure maintaining valve and a check valve shall be supplied downstream of the purification system to increase the efficiency of the purification system by maintaining a positive back pressure. A check valve shall be supplied between the coalescing separator on the compressor’s discharge line and the purification system to maintain the positive pressure in the purification system when the compressor shuts down.

The purification system shall include Bauer’s patented Securus Electronic Moisture Monitor System. A sensor shall be located in the Securus purifier cartridge for direct monitoring of moisture levels. The Touch Screen Display shall indicate the status of the Securus cartridge. The Securus system shall warn the operator, in advance, of the impending expiration of the Securus cartridge via a scrolling text display message on the panel mounted operator / compressor interface. The compressor shall shut down automatically and the operator notified via audible alarm and scrolling text display message on the panel mounted operator / compressor interface should the operator fail to change the Securus cartridge within the warning period. The compressor shall not be capable of restarting until the used cartridge is replaced with a new one13. The moisture monitoring system shall be of a fail-safe design. Should the electrical contact between the display module and sensor be disconnected, an immediate fault shut down shall be

5Replace all cartridges at the same time.

BL056-22 Page 16 effected. For absolute safety and highest quality breathing air, no manual override shall be supplied for the moisture monitor.

Cascade Fill Control / Instrument Panel

A steel instrument panel affixed with a non-glare Lexan→ overlay shall be installed on the front of the station. The overlay shall contain an embedded airflow schematic. The cascade fill control / instrument panel shall be hinged for easy maintenance and accessibility.

The cascade control panel shall be factory piped for four storage banks and designed to fill three SCBA cylinders either independently or simultaneously. The control panel shall include, at a minimum, a manual control valve and pressure gauge for each storage bank, an adjustable regulator for SCBA cylinder fill pressure complete with a pressure gauge for inlet and regulated pressure and a relief valve to protect the SCBA cylinders from overfilling, a manual control valve and pressure gauge for each fill position, a manual direction valve to allow the operator to select SCBA filling from either air storage or the compressor, provisions for factory or field modification to allow a different fill pressure at each fill position. The cascade system shall allow the simultaneous tasks of filling one storage bank while drawing down another during the SCBA fill process. Strategically placed tees and check valves preclude the need for individual “To” and “From” valves. Systems requiring individual “To” and “From” valves shall not be deemed acceptable, as they require more efforts to operate.

All control panel mounted pressure gauges shall have a 2 ½” diameter and be liquid filled. A fluorescent light shall be factory installed above the panel to provide a glare-free illumination of the control panel. An on/off switch shall be integrated into the operator / compressor interface for the light.

Air Storage

The air storage system shall include two receivers fabricated, tested, and stamped in accordance with Section VIII of the ASME Boiler and Pressure Vessel Code. The receivers shall have a 3:1 safety factor at 6000 PSIG (7000 PSIG MAWP at 200°F).14 Each receiver shall have a capacity of 491 cu ft at 6000 PSIG15. The receivers shall be mounted in a vertical configuration in a rack that is integral to the breathing air station’s frame. The rack shall be designed to accommodate four identical receivers. The receivers shall be installed in accordance with 29 CFR 1910.169. The rack shall be designed to support the receivers in a secure manner and permit visual inspection of the receivers’ external surface. Each receiver shall be supplied with a manual drain valve, an isolation valve and safety relief valve. For ease of maintenance and periodic inspection all the drain valves shall be piped to one convenient location within the Unicus 4 enclosure. Each receiver, or bank of receivers if additional storage is required, shall be piped to the cascade fill control panel to facilitate cascade filling.

**Containment Fill Station

6 UN storage systems available.

7Capacity referenced to 70°F.

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The front-loading, three position; containment fill station shall totally enclose the SCBA or SCUBA16 cylinders during the refilling process.

The fill station’s outer enclosure and door assemblies shall be constructed of formed ¼ inch thick plate steel. Venting shall be provided in the bottom of the fill station to allow the rapidly expanding air from a ruptured cylinder to escape from the fill station. The fill station shall be ergonomically designed for maximum operator convenience and safety for refilling cylinders. The fill station door and cylinder holder assembly shall tilt out towards the operator 45 degrees, providing unobstructed access to the cylinder holder to load and unload the cylinders. A chrome plated handle and heavy-duty gas spring shall be incorporated into the design of the fill station to assist the operator in opening and closing the fill station door. It shall take no more than approximately eighteen pounds of force to open or close the fill station door thereby eliminating operator fatigue.

Each cylinder holder shall be lined to prevent scuffing the outer surface of the SCBA cylinders. For complete operator protection, the fill station shall include a safety interlock system that will prevent refilling SCBA cylinders unless the fill station door is closed and secured in the locked position. The automatic interlock will require no actuation of secondary latching mechanism on the outside of the fill station.

**Three fill hoses shall be located within the fill station. Each fill hose shall be equipped with a stainless-steel bleed valve and stainless-steel SCBA fill adapter of choice. Fill hose retainers shall be provided to anchor the fill hoses when not in use.

Testing and Preparation for Shipment

The breathing air station shall be tested by the manufacturer prior to shipment

A manufacturer’s nameplate shall be placed on the interior of the electric panel. The nameplate shall include, at a minimum, manufacturer’s name, model number, serial number, compressor block number, and date of manufacture. Voltage, phase / frequency, and amperage are located on another label inside the electrical panel

The station shall be suitably prepared for motor freight transport. The station shall be bolted to a wooden pallet, wrapped in sheet plastic, and fully protected by a wooden crate. The compressor intake and similar openings shall be suitably covered. Component parts, loose parts or associated spare parts shall be packaged separately and shipped on the same pallet if feasible.

Documentation

A documentation package shall be supplied with the station. The documentation package shall include, at a minimum, an operation manual on CD, recommended spare parts list, warranty information and a start-up/warranty registration form.

The Operator’s Instruction and Maintenance Manual for the breathing air station shall be as detailed as possible, outlining all operation and maintenance instructions. The manual shall include detailed illustrated drawings for the compressor block and all system components along with a complete parts listing for all illustrated components. Warnings and safety precautions shall be identified clearly in the manual.

8SCUBAs up to 31” maximum overall length including valve, boot, and fill yoke.

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**Installation, Set-up, and Initial Startup

**Gwinnett Fire & Emergency Services will provide an electrical disconnect with a minimum of 15 feet of wire from the electrical disconnect for connection to the compressor.

**The successful service provider will complete installation and set-up of the breathing air compressor in a location approved by Gwinnett Fire & Emergency Services.

** The successful service provider will complete the initial startup and testing of purified air that meets or exceeds the requirements of CGA Pamphlet G-7, Compressed Air for Human Respiration, the requirements of ANSI/CGA G-7.1, Commodity Specification for Air, Grade E, and all other recognized standards for respirable air.

**Accessories to be Included

The following shall be included by the manufacturer as accessories to the breathing air station:

− **leveling feet and securing brackets (no charge option) − **Two additional ASME receivers − **Carbon monoxide monitor with calibration kit − **Remote Fill with regulator, pressure gauge, line valve, and cabinet enclosed hose reel with 100 ft of

BL056-22 Page 19

UN4/25H-E3

**Containment Fill Station **Three fill hoses shall be located within the fill station. Each fill hose shall be equipped with a stainless-steel bleed valve and stainless-steel SCBA fill adapter of choice. Fill hose retainers shall be provided to anchor the fill hoses when not in use.

**Installation, Set-up, and Initial Startup

**Gwinnett Fire & Emergency Services will provide an electrical disconnect with a minimum of 15 feet of wire from the electrical disconnect for connection to the compressor.

**The successful service provider will complete installation and set-up of the breathing air compressor in a location approved by Gwinnett Fire & Emergency Services.

** The successful service provider will complete the initial startup and testing of purified air that meets or exceeds the requirements of CGA Pamphlet G-7, Compressed Air for Human Respiration, the requirements of ANSI/CGA G-7.1, Commodity Specification for Air, Grade E, and all other recognized standards for respirable air.

**Accessories to be Included

The following shall be included by the manufacturer as accessories to the breathing air station:

− **leveling feet and securing brackets (no charge option) − **Two additional ASME receivers − **Carbon monoxide monitor with calibration kit − **Remote Fill with regulator, pressure gauge, line valve, and cabinet enclosed hose reel with 100 ft of

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