Addendum 1

CHATHAM COUNTY PURCHASING DEPARTMENT

ADDENDUM NO. 1 TO BID# 22-OOO8.5

FOR: REPLACEMENT OF AN AIR COMPRESSOR AND ASSOCIATED EQUIPMENT

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PLEASE SEE THE F'OLLOWING ADDITIONS, CLARIFICATIONS AND/OR

CHANGES:

1. Change: Due to no attendance, this will no longer be a mandatory Pre-Bid Conference and anyone qualified can submit a response.

2. Clarification: Please see attached specifications for the Kaeser Air Compressor and components.

BID DUE DATE WILL REMAIN 2:OOPM

FEBRUARY 16,2022

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February 8"2022

DATE

ARET H. JOYNER

PURCHASING DIRECTOR

CHATHAM COLTNTY

IIAESER

COMPRESSOR$

KAESER rotary screw compressors

Type: AIRTOWER 5C (air-cooled) SXG complete system

The AIRTOWER 5C is an all-in-one compact compressed air supply system: As the saying goes, "Just plug and play".

The rotary screw compressor, refrigeration dryer and air receiver are #hidden beneath the SXC'e double-skinned roto-moulded polyethylene enclosure to oreate a single turnkey unit. The complete system delivers outstanding energy efficiency, ease of maintenance, durability and perfectly matohed components to ensure years of dependable, cost-effective service. The SXC is th6 ideal choice for users in the trades and workshop sec.tor who require a dependable supply of quality compressed air from a highly compact compressed air system.

Technical specifications (Performance parameters at 125 psig gauge working preseure, relative to the entire system, including fans. ln accordance with ISO 1217:2A09 Annex C.)

Flow rate at 125 pslg(g) 21.19 cfm

Power consumption of entlrc syotem at t25 psig(g) 5.1 kW

Max. gauge presaure 125 pslg

Drive motor efficiency, full load 88.5 o/o

Drive motor efficiency class tE3

Drive motor rated capacity 5,0 hp

Drive motor speed 3520 rpm

Drive motor protection rating lP 54

Eleckicalsupply 2O823OA8OVl3lBOHz

Compressed air discharge temperature above ambient temperature (at 68'F, 31o/o rel. humidity)

Sound pressure level 70 dB(A)

Specifications are subject to change without notioe, :-.-:-_i:;.?t la:!.

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QUOTATION

Technical specifications - Type: AIRTOWER 5C

Pressure loss, refrigeration dryer 2.6 psi rlAESER

COMPRESSORS

Pressure dew point at ambient temperature 68"F, rel. humidity 30% 43 "F

Refrigerant R-5134

Refrigerant charge 0,55 tb

Global warming potential (GWP) 631

CO2 equivalent 0.16 t

I nternally-coated alr receivers 215 I

Compressed air connection 3/4 NPT

Cooling oilcharge 0.7 US gal

Compressor cooling oil type SIGMA FLUID M-460

Dimensions(WxDxH) 24.375|N x 38.625 lN x 58,250 lN

Weight 639|b

Specifications subject to change without notice.

Available options

Bolt-down machine feet

Compressor cooling oil type

Project planning note:

Please note that additional compressed air treatment components may be required for your proposal. Compressed air always contains a certain amount of solid matter/dust, moisture and residual oil content (hydrocarbons in aerosol/vapour form). Depending on the application, a cerlain standard of treatment may be required (see ISO 8b73). We will be pleased to provide further advice and information.

.i ri

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QUOTATION

Teohnlcal speclflcaUons - Type: F6KE

Standard equipment:

Corrosion-protected aluminium enclosure Standard

ITAESER

COMPRESSORS

Locking screw for faultless opening and closing Standard

Differential pressure gauge (mechan ical) Standard

Flowoptimized element head Standard

Large filter surface area thanks to deepfold filter media Standard

$table, surfacrtreated polyester drainage layer Standard

Stable element frame made from a perforated stainless steel plate Standard

0ptions:

Differential pressure monitoring Pressure diff. gauge

Wallbracket kit

Silicone-free version (\Aff factory standard 3.10.7) No

Special paint, filter bowl

Project planning note:

' Please note that additional compressed air treatment components may be required for your proposal.

Compressed air always contains a certain amount of solid matter/dust, moisture and residual oil content

(hydrocarbons in aerosol vapour form). Depending on the application, a certain standard of treatment may be required (see ISO 8573). We will be pleased to provide further advice and information, 8/13 r{AESER

COMPHESSORS

SUOTATION

KAESER FILTER

Typ: FGKE - KE - Extra Maintenance-friendly, low-cost clean air.

KAESER FILTERS are key to the preparation of compressed air to all ISO 8573-1 purity classes, and they perform their role with very low pressure differentials. Their maintenance-friendly design means it is eaey to correcly open and close the fitter housing, enabling the filter element to be changed quickly and with the minimum of fuss.

Technlcal Data (peformance patameters at 100 psi operating pressure, based on 14.5 psi(a) and 68 oF. Aerosol test concentration 1 0 mg/m3)

Flow rate 2'1.2 cfm

Pressutr differential as new (dry) <2,9 psi lnitial pressure differential when saturated <2,03 psi

Maximum residual aerosol content <0,01 mg/m3

Operating pressure, max.lmin. 232 psig / 30 psig

Ambient temperature max./min 122'F / 3g "F

Compressed air inlet temperature 38"F/150'F

Compressed air connection 1/2 NPT

Condensate drain version Automatic

Dimensions(WxDxH) 6.102 lN x 3.4251N x 14.094 lN

Weight 8tb

Subject to alteration without noticel

Application:

For use downstream from compressed air drying, For removal of aerosols and solid particles for high compressed air quality.

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IIAESER

COMPRESSORS

QUOTATION

Kaeser Condensate Filter (KCF) Models:

KCF 25, KCF 50, KCF 100, KCF 200, KCF 400

Maximum Pressure at lnlet Maximum Ambient Air Temperature Minimum Ambient Air Temperature Estimated Weight

232 psig 140 0F

41 0F

KCF 25 7.7 lbs, KCF50 12.7 lbs KCF100 19.5 lbs, KCF200 70.5 lbs KCF400 92.6 lbs

2 (KCF 25, KCF 50, KCF 100)

4 (KCF 200, KCF 400)

Number of lnlet Connections

Kaeser Condensate Filter designed for the performance specified herein and including the following standard features and accessories:

- liglitwgight - easily handled and positioned for filling

- Crafted of rotation-molded polyethylene

- Up"q coated polypropylene absorbent technology

- Single abs,orbent cartridge incorporates two-stag-e separation

- Self-contained single. element is easily replaced and Suitable for landfill disposal ;.-Typical cartridge liie is o monini,-coriprdssoi iype, tuniicant, and amnleni't-onditions affect service life.

- Condensate can be discharged under pressure into the unit

- No electricity required

- No hard piping required

- No moving parts

- Water purity sampling port with shut-off valve on modele 25, ZOO, and 400

Maintenance

- Easily removable lid

- Filter cartridges are equipped with lifting

- Disconnecting of inlet lines not required

Options

- lmmersion heater with thermostat for low ambient installations

- I'Jigf pressure relief chamber (up to 580 psig at inlet)

- High condensate level alarm

- Flgy splitter tnat permlts the slmultaneous use of up to four parallel piped units for large air flow applications handles for filter change

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