FA441822R0011 Addendum 01.docx

DOCX document 131 KB Posted May 10, 2022

Attached to: Repair Brig 3107 HVAC, C2 Mech Room
Solicitation number: FA4418-22-R-0011
Issued by: Department of the Air Force Air Mobility Command

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Written by GovTribe AI · Dec 28, 2023

This addendum modifies a solicitation for a firm-fixed price contract to repair HVAC systems at Joint Base Charleston in South Carolina. Key changes include removing a hot water system flushing requirement and revising specifications for replacing air handling units and associated hot water coils, piping, valves, and controls. Bidders must provide unit pricing and total costs for the air handling unit replacements according to the attached details. Additional piping, valve, insulation and control specifications are noted. The location and time of an optional pre-bid site visit are provided, with registration requirements. The Department of the Air Force Air Mobility Command is the contracting agency.

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Other files

File	Type	Posted
Solicitation Amendment FA441822R00110002 SF 30.pdf	PDF	May 10, 2022
2 Housing AHUs As-built dwgs 1985.pdf	PDF	May 10, 2022
3 Housing AHUs HW Coil Sched As-built dwgs 1985.pdf	PDF	May 10, 2022
Solicitation Amendment FA441822R00110001 SF 30.pdf	PDF	May 10, 2022
AHU Model Numbers.pdf	PDF	May 6, 2022
B3107 Questions and Answers.xlsx	XLSX spreadsheet	May 6, 2022
B3107 Precon Site Visit Roster.pdf	PDF	May 2, 2022
Solicitation - FA441822R0011.pdf	PDF	Apr 8, 2022
SPECIFICATIONS 200630.pdf	PDF	Apr 7, 2022
Wage Determination SC20220022.pdf	PDF	Apr 7, 2022
ASBESTOS AND LPB ASSESSEMEN REPORT 191127.pdf	PDF	Apr 7, 2022
DRAWINGS 200630.pdf	PDF	Apr 7, 2022
SUBMITTAL REGISTER-AF 66.pdf	PDF	Apr 7, 2022
Solicitation - FA441822R0011.pdf	PDF	Apr 7, 2022

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ADDENDUM 01

SOLICITATION NUMBER FA441822-R-0011

PROJECT DKGV 1073225

REPAIR BRIG HVAC, Bldg 3107

JOINT BASE CHARLESTON, SC

05 May 2022

1. Solicitation, Section B, CLIN 0006: Delete this CLIN in its entirety. The Hot Water System shall not be flushed by the contractor and shall not be proposed as a bid option. The Bid Option in the plan sheet G200 is #5.

2. Solicitation, Section B, CLIN 0005: This is Bid Option #4 on sheet G200. The CLIN is revised to the following:

Item

Supplies/Service

Qty

Unit

Unit Price

Amount

0005

AHU A1, A2, B1, B3: Replace housing units AHU A1, A2, B1, and B3 shown on sheet M201 and E104. For each AHU, replace associated hot water coils, piping, valves, and controls per Addendum 01, Item 5 and attached drawings and tables. There are seven (7) HW coils per AHU.

Each

3. Plan Sheet G200, Bid Option #4, modify as follows:

Contractor shall provide with their proposal a per AHU unit price line item and a total cost to replace housing unit AHU (AHU-A1, AHU-A2, AHU-B1, AHU-B3) shown on sheet M201 and E104. For each AHU, replace associated hot water coils, piping, valves, and controls per Addendum 01, Item 5 and attached drawings and tables. There are seven (7) HW coils per AHU.

4. Plan Sheet M002 –Hydronic System Scope Notes: Delete Note 1 in its entirety.

5. Provide the following for the new HW Coils of AHU-A1, A2, B1, and B3

a. See attached 2 files for arrangement of the Hot Water Coil and the duct mounted HW coil schedule. All work shall include transitions to ductwork upstream and downstream of the coils.

b. The coil details are shown below and should include all new components between the coil and the existing isolation valves.

c. Provide 3-way DDC Control water valves. Controls and all HW coils (or indicate “Typ”) shall be added to the control schematic of sheet M006. The Contractor shall modify the record drawings by the contractor, including controls, upon completion of work. The Sequence of Operation (Sheet M006) covers new hot water coils.

d. Provide insulation for heating hot water piping per Section 23 07 00

e. Provide hangers and seismic restraints per Section 23 05 48.19

f. Provide piping, fittings, valves, etc. per Section 23 64 26

g. The HW coils shall be added to TAB of Section 23 05 93 and the DDC controls of Section 23 09 13 and 23 09 23.02.

h. Contractor to submit for approval all material, tests, O&M, data sheets, etc., per the individual Specifications sections and per Section 01 33 00, Submittal Procedures.

6 | Page

DUCT MOUNTED HOT WATER COILS

SYMBOL

HWC-1

HWC-2

HWC-3

HWC-4

HWC-5

HWC-6

HWC-7

HWC-8

AIR QUANTITY, CFM

CAPACITY, BTU/HR

68,590

46,040

123,792

46,510

75,402

125,201

32,886

64,792

ENT. AIR DB, oF
46.5
46.5
46.5
46.5
46.5
46.5
46.5
47.3

LVG. AIR DB, oF
90
90
90
90
90
90
90
90

MAX. AIR PRESSURE DROP, IN. H20
.25
0.25
0.28
0.26
0.26
0.29
0.25
0.24

MAX. FACE VELOCITY,	FPM
700
700
700
700
700
700
700
700

HOT WATER GPM
2.8
1. 9
5.1
1.9
3.1
5.2
1.4
2.7

ENTERING WATER TEMP., oF
200
200
200
200
200
200
200
200

LEAVING WATER TEMP. oF
150
150
150
150
150
150
150
150

MAX. WATER PRESSURE DROP, FT. H20
5
5
5
5
6
5
5
5

LOCATION

FAN RM A248

DUCT MOUNTED HOT WATER COILS

SYMBOL

HWC-9

HWC-10

HWC-11

HWC-12

HWC-13

HWC-14

AIR QUANTITY, CFM

CAPACITY, BTU/HR

47,038

133,736

37,353

65,023

129,585

47,038

ENT. AIR DB, oF

47.3

LVG. AIR DB, oF

MAX. AIR PRESSURE DROP, IN. H20

0.26

0.31

0.19

0.21

0.30

0.26

MAX. FACE VELOCITY,	FPM
700
700
700
700
700
700

HOT WATER GPM

1.9

5.5

1. 5

2.7

5.3

1. 9

ENTERING WATER TEMP., oF

200

LEAVING WATER TEMP. oF

150

MAX. WATER PRESSURE DROP, FT. H20

LOCATION

FAN RM A248

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File details come from the government source that posted it. Updated May 10, 2022.