Attach 2 Drawing_4.pdf

FA670326Q0002 Attach 2

"x

F C

-1

(R E

L O

C A

T E

D

APPLICATION OF THE DRAWINGS:

CONSTRUCTION DOCS.

REV. DATE/BY DESCRIPTION

1. DRAWINGS ARE DIAGRAMMATIC AND ARE NOT

REPRESENTATIVE OF ALL POTENTIAL

CONDITIONS. COORDINATE WITH ALL

DISCIPLINES TO ENSURE PROPER

INSTALLATION OF ALL SYSTEMS AND

EQUIPMENT.

2. CONFLICTS: THE PROVISION, SPECIFICATION

OR DRAWING IN THE CONTRACT DOCUMENTS

WHICH PROVIDES FOR THE HIGHER QUALITY

OR QUANTITY SHALL TAKE PRECEDENCE OVER

A CONFLICTING OR INCONSISTENT PROVISION,

SPECIFICATION OR DRAWING IN THE

CONTRACT DOCUMENTS. WHERE SUCH A

CONFLICT IS IDENTIFIED, THE CONTRACTOR

SHALL SUBMIT A REQUEST FOR INFORMATION

(RFI).

3. REFER TO ARCHITECTURAL REFLECTED

CEILING PLAN(S) FOR EXACT LOCATION OF ALL

CEILING-MOUNTED EQUIPMENT AND AIR

DISTRIBUTION DEVICES.

GENERAL NOTES - DEMOLITION:

1. PRIOR TO PROJECT COMPLETION, CLEAN

EXISTING DUCTWORK AND DIFFUSERS AND

SEAL LEAKS IN DUCTWORK FOR REUSE IN

HVAC SYSTEMS INCLUDED WITHIN THE SCOPE

OF THE PROJECT. SEE DUCT CLEANING

SPECIFICATIONS.

2. STORE ALL EQUIPMENT AND DIFFUSERS THAT

ARE TO BE REUSED TO PROTECT THEM FROM

DAMAGE AND DEBRIS DURING CONSTRUCTION.

COORDINATE STORAGE LOCATION WITH C.O.

PRIOR TO COMMENCING WORK.

3. ONCE DEMOLITION IS COMPLETE, PATCH

HOLES AND DAMAGED AREAS OF

CONSTRUCTION (E.G., DRYWALL) CAUSED BY

CONSTRUCTION. FINISH AND PAINT TO MATCH

SURROUNDING SURFACES.

HVAC SYMBOL LEGEND

0 2025/08/26 HVAC UPDATE CD'S

T THERMOSTAT

LIMIT OF SCOPE

SUPPLY AIR DIFFUSER

S2 110 S2 110

RETURN AIR DIFFUSER

DIFFUSER BLANK

D13

D5

D13 D13

D5

S2 110

CONFERENCE

ROOM

S2 110

FLEXIBLE DUCTWORK

1 SHEET NOTE TAG

MANUAL VOLUME DAMPER

DUCT TAKEOFF WITH INTEGRATED

BALANCING DAMPER

CONDENSATE PIPING

Croft & Associates

3400 Blue Springs Road, Suite 200 Kennesaw, GA 30144

770.529.7714 (p)

770.529.7716 (f) www.croftae.com

D9

D3

D4 T

D13

D2 D1

S2 95

R3

CORRIDOR

S1 40

RESTROOM

REFRIGERANT PIPING

AIR DEVICE TAG

DEVICE TYPE MARK

AIRFLOW (CFM)

XX ###

D11

FC-1

D7

OFFICE

10"ø

12"x12"

S1 35

OPEN OFFICE

S2 120

A.F.F.

BAS

CD

C.O.

EF

FC

ABBREVIATIONS

ABOVE FINISHED FLOOR

BUILDING AUTOMATION SYSTEM

CONDENSATE DRAIN

CONTRACTING OFFICER

EXHAUST FAN

FAN COIL

D8

R2

R1

R1

H.M.I.

HP

L

OSA

REF

RL

RS

TYP.

HUMAN-MACHINE INTERFACE

HEAT PUMP

LOUVER

OUTSIDE AIR

REFRIGERANT

REFRIGERANT LIQUID

REFRIGERANT SUCTION

TYPICAL

D10

D6

D12

L2 145

S2 85

R3

RECEPTION

AREA

16"x16"

12"x12"

OPEN OFFICE

SUPPLIES /

STORAGE

S2 65

S2 65

R2

M-

HVAC

DEMOLITION

PLAN

1/4" = 1'-0"

12"x12"

HISTORIC BUILDING PROJECT:

THE PROJECT FACILITY IS A REGISTERED HISTORIC BUILDING.

PERFORM ALL WORK TO MINIMIZE IMPACT TO THE HISTORIC

FABRIC OF THE BUILDING, INCLUDING FLOORING, WOOD

CEILINGS, AND OTHER BUILDING ELEMENTS AS DIRECTED BY

THE HISTORICAL PRESERVATION AUTHORITY AND THE

CONTRACTING OFFICER. DO NOT MAKE HOLES OR ALTER

ELEMENTS IDENTIFIED AS BELONGING TO THE HISTORIC

FABRIC WITHOUT CONSULTING THE ABOVE REFERENCED

AUTHORITIES.

IV

IL

E N

G

IN

E E

R

IN

G th

A

IR

L

IF

T W

O B

B

IN

S A

IR

R

E S

E R

V E

B A

S E

G

E O

R

IA

/2

/2

:0 :3

P

M

A u to d e s k

D o c s /2

-1

D o b b in s A

R B

B ld g

/2

-1

D o b b in s A

R B

B ld g

M

.r v t

T

"x

"x

B E

L

W

"x

B E

L

W

R

C K

H O

U S

E R

E N

O V

A T

IO

N

B U

IL

D

IN

G

F

W B

-0

B B

IN

S

A

IR

R E

S E

R V

E B

A S

E

G E

O R

O J E

L

C A

T

H V

A C

U P

D A

T E

P L

A

W

O

JE

C T

C O

N T

A C

T

R O

B E

R T

E R

N S

T

D S

N

-3 ro b e rt

.e rn s t.

u s .a f.

m il

C O

N T

A

VENTILATION CALCULATIONS

NOTE: AIRFLOWS SHOWN ARE CALCULATED VALUES. FOR FINAL AIR BALANCE, SEE AIRFLOWS INDICATED ON HVAC NEW WORK PLAN.

MASTER KEY: HVAC DEMOLITION SHEET NOTES

SEE INDIVIDUAL SHEETS FOR APPLICATION

TAG # TAG DESCRIPTION

D1 DISCONNECT EXISTING FC-1 AND ALL ASSOCIATED SENSORS, CONDENSATE

PUMP, PIPING, U.V. LAMP ASSEMBLY, AND SENSORS AND STORE FOR REUSE IN

NEW WORK PHASE. DISCONNECT ELECTRICAL FEEDERS AND CONDUIT. REMOVE

WIRING AND CONDUIT BACK TO ATTIC ENTRY POINT AND INSTALL A JUNCTION BOX

FOR SPLICING OF CIRCUIT CONTINUATION TO ACCOMMODATE UNIT IN NEWLY

INDICATED LOCATION. REMOVE FC-1 DISCONNECT SWITCH AND STORE FOR

REUSE IN THE NEW LOCATION.

D2 DISCONNECT EXISTING FC-1 REFRIGERANT LINESETS AND REROUTE TO NEW FC-1

LOCATION AS INDICATED ON NEW WORK PLAN.

D3 DISCONNECT EXISTING FC-1 THERMOSTAT AND STORE FOR REUSE IN NEW WORK

PHASE.

D4 DEMOLISH CONDENSATE DRAIN PIPING UP TO POINT INDICATED. REMAINING

DRAIN PIPING TO OUTSIDE TO REMAIN FOR REUSE IN NEW WORK PHASE. PLUG

UNUSED PIPE INLET AT WYE FITTING.

D5 DEMOLISH EXISTING DIFFUSER AND PATCH, SEAL, AND RE-INSULATE DUCTWORK.

PATCH CEILING AND PAINT TO MATCH.

D6 DEMOLISH EXISTING FAN COIL UNIT FC-2 AND ASSOCIATED CONDENSATE PUMP,

SENSORS, UV LAMP ASSEMBLY, AND EQUIPMENT, AND RETURN TO THE

GOVERNMENT. DEMOLISH ASSOCIATED ELECTRICAL FEEDERS BACK TO

ELECTRICAL PANEL AND ABANDON CONDUIT IN PLACE. TURN CIRCUIT BREAKERS

TO "OFF" POSITION AND UPDATE PANEL SCHEDULE TO INDICATE THESE

POSITIONS AS "SPARE". DEMOLISH ASSOCIATED CONTROL WIRING AND

THERMOSTAT, AND RETURN THERMOSTAT TO GOVERNMENT.

D7 DEMOLISH EXISTING COMBUSTION AIR DUCT. CAP VERTICAL OPENING ABOVE

ROOF AND ABANDON IN PLACE.

D8 LABEL DEMOLISHED FC-2 CIRCUITS AS "UNUSED" IN ELECTRICAL PANEL.

D9 DEMOLISH EXISTING CONDENSER UNIT CU-2 AND ASSOCIATED REFRIGERANT

LINESETS, WIRING, AND CONDUIT. RETURN CONDENSER UNIT TO THE

GOVERNMENT.

D10 DEMOLISH EXISTING COMBUSTION AIR DUCT TO ELBOW. REMAINING

PENETRATION TO REMAIN FOR REUSE IN NEW WORK PHASE.

D11 DEMOLISH CONDENSATE DRAIN LINE TO POINT INDICATED. REMAINDER OF

CONDENSATE DRAIN PIPE TO REMAIN FOR REUSE IN NEW WORK PHASE.

D12 DEMOLISH OUTSIDE AIR DUCT AS SHOWN. BLANK OFF LOUVER WITH INSULATED

PANEL.

D13 EXISTING AIR TERMINAL TO REMAIN IN PLACE.

MASTER KEY: HVAC NEW WORK SHEET NOTES

SEE INDIVIDUAL SHEETS FOR APPLICATION

TAG # TAG DESCRIPTION

1 BALANCE FAN COIL UNIT FOR AIRFLOW QUANTITIES SHOWN ON THE PLAN.

2 INSTALL DIFFUSER QUADRANT BLANK TO PREVENT RETURN AIR SHORT CIRCUIT

3 REINSTALL FAN COIL UNIT, FLEXIBLE DUCT CONNECTIONS, DUCT-MOUNTED U.V.

LAMP ASSEMBLY, AND SENSORS. RE-CONNECT UNIT TO JACE IN ATTIC. CLEAN ALL

DUCTWORK, FAN COIL, AND DIFFUSERS IN THE FACILITY. SEE HVAC DUCT

CLEANING SPECIFICATIONS, SHEET M-102.

4 REINSTALL FAN COIL UNIT AUX DRAIN PAN, CONDENSATE PUMP, AND CONNECT

NEW CONDENSATE DRAIN PIPING TO EXISTING CONDENSATE DRAIN ROUTED

OUTSIDE AS SHOWN.

5 REROUTE REFRIGERANT LINESETS TO NEW FAN COIL UNIT LOCATION AS

INDICATED

6 REINSTALL FC-1 THERMOSTAT AT 42" A.F.F.

7 INSTALL NEW POLYPROPYLENE EXHAUST-RATED PIPING TO CONNECT TO

EXISTING COMBUSTION AIR AND EXHAUST THROUGH ROOF.

8 INSULATE ALL NEW DUCTWORK (EXCEPT DUCTWORK INDICATED TO RECIEVE

LINING). PROVIDE 2-INCH OVERLAP OF NEW INSULATION OVER EXISTING.

9 INSTALL NEW ELECTRIC FEEDER FROM ATTIC ENTRY JUNCTION BOX (SEE DEMO

NOTE "D1") TO NEW FC-1 LOCATION. MATCH EXISTING (PRIOR TO

RECONFIGURATION) FC-1 CONDUIT AND WIRING FEEDER. REINSTALL EXISTING

FC-1 DISCONNECT AT NEW UNIT LOCATION AND BREAK FEEDER THROUGH SWITCH

PRIOR TO TERMINATING AT UNIT.

http://www.croftae.com/ mailto:robert.ernst.5@us.af.mil

PLAN

NORTH

M-101

HVAC

NEW

WORK

PLAN

1/4" = 1'-0"

P

R

O

J

E o

O

J

F

I

C

S

I

G

N

E

D

C H E C K

T

2018-173

J. MORGAN

M. JOHNSON

V. MAZZEI 2025/08/26

0 5 10 FT 0 5 10 FT DRAWING 1 OF 2

M-101

C o p y ri g h t b y C ro ft

A s s o c ia te s In c

A ll ri g h ts r e s e rv e d

T h is d o c u m e n t is p ro p e rt y o f C ro ft

A s s o c ia te s In c

It is t o b e u s e d o n ly f o r th e s p e c ifi c p ro je c t re fe rr e d t o o r id e n tif ie d h e re in a n d is n o t to b e u s e d o n o th e r p ro je c ts in w h o le o r in p a rt , e x c e p t b y th e e x p re s s w ri tt e n a g re e m e n t o f C ro ft

A s s o c ia te s In c

SUPPLY

RETURN OR

EXHAUST

LEGEND

MECHANICAL SPECIFICATIONS: CONSTRUCTION DOCS.

FLEXIBLE DUCTWORK REV. DATE/BY DESCRIPTION

GENERAL:

1. APPLICABLE CODES AND REGULATIONS:

1.1. UNIFIED FACILITIES CRITERIA (UFC) (https://www.wbdg.org/dod/ufc)

1.2. 2024 EDITION OF THE INTERNATIONAL BUILDING CODE (IBC) AND ALL

REFERENCED CODES INCLUDED THEREIN (E.G., IPC, IMC, IFC, NFPA,

IECC, ETC.)

1.3. NFPA 70 - NATIONAL ELECTRICAL CODE, 2023 EDITION

1.4. DOBBINS AIR RESERVE BASE FACILITY STANDARD.

1.5. ALL CURRENT AMENDMENTS TO CODES LISTED.

2. FIELD-VERIFY EXISTING CONDITIONS, AND DUCTWORK / EQUIPMENT SIZES,

LOCATIONS, ROUTING, ETC. PRIOR TO BEGINNING WORK OR PURCHASING

ANY MATERIALS, AND REPORT ANY DEVIATIONS TO THE CONTRACTING

OFFICER.

3. THE CONTRACT DOCUMENTS ARE DIAGRAMMATIC IN NATURE AND NOT EVERY

DETAIL OR EXACT LOCATION OF EQUIPMENT AND / OR CONDUIT IS SHOWN.

VERIFY ALL CONDITIONS AND DIMENSIONS PRIOR TO ORDERING ANY

MATERIAL OR PERFORMING ANY WORK. NOTIFY THE CONTRACTING OFFICER

OF ANY CONDITIONS OR DIMENSIONS WHICH WOULD AFFECT

PERFORMANCE OF WORK IN ACCORDANCE WITH THE CONTRACT DRAWINGS

AND / OR SPECIFICATIONS.

4. OBTAIN ALL PERMITS, INSPECTIONS, AND APPROVALS AS REQUIRED BY THE

CONTRACTING OFFICER, AND DELIVER CERTIFICATES OF APPROVAL TO THE

DESIGN PROFESSIONAL. ASSUME AND PAY ALL FEES AND COSTS OF ANY

NATURE WHATSOEVER INCIDENTAL TO THESE PERMITS.

5. COORDINATE EXACT PHASING OF ALL WORK WITH CONTRACTING OFFICER.

6. COORDINATE ALL AIR DEVICES, WALL OPENINGS, AND ROOF OPENINGS WITH

IN-FIELD CONDITIONS.

7. SUPPORT ALL EQUIPMENT FROM THE BUILDING STRUCTURE USING SPRING

ISOLATORS TO PROVIDE A VIBRATION-FREE INSTALLATION.

8. ALL EQUIPMENT SHALL BE TESTED AND BALANCED USING METHODS

APPROVED BY NEBB AND / OR AABC. TESTING AND BALANCE (TAB)

SERVICES SHALL BE PERFORMED BY A LICENSED TAB CONTRACTOR

HAVING AT LEAST 5 YEARS OF EXPERIENCE.

9. ALL EXTERIOR PENETRATIONS SHALL BE FLASHED, COUNTERFLASHED, AND

SEALED TO MAKE WATERTIGHT, OR INSTALLED PER MANUFACTURER'S

RECOMMENDATIONS FOR A WATERTIGHT INSTALLATION.

10. HVAC DUCT CLEANING SPECIFICATIONS:

10.1. CLEANING CONTRACTOR QUALIFICATIONS: COMPANY SPECIALIZING IN

THE CLEANING AND RESTORATION OF HVAC SYSTEMS AND EMPLOYING

FOR THIS PROJECT A SUPERVISOR CERTIFIED AS AN AIR SYSTEMS

CLEANING SPECIALIST BY NADCA (NATIONAL AIR DUCT CLEANERS

ASSOCIATION).

10.2. BIOLOGICAL GROWTH HAS BEEN OBSERVED ON SURFACES WITHIN THE

BUILDING. CLEAN ALL INTERIOR SURFACES OF THE HEATING, AIR-

CONDITIONING AND VENTILATION SYSTEM FROM THE POINTS WHERE

THE AIR ENTERS THE SYSTEM TO THE POINTS WHERE THE AIR IS

DISCHARGED FROM THE SYSTEM, INCLUDING THE INSIDE OF AIR

DISTRIBUTION EQUIPMENT, COILS, AND CONDENSATE DRAIN PANS.

10.3. PERFORM CLEANING, INSPECTION, AND REMEDIATION IN ACCORDANCE

WITH THE RECOMMENDATIONS OF NADCA "ASSESSMENT, CLEANING

AND RESTORATION OF HVAC SYSTEMS" (ACR) AND AS SPECIFIED

BELOW.

10.4. WHERE NADCA ACR USES THE TERMS "RECOMMENDED", "HIGHLY

RECOMMENDED", OR "IDEALLY" IN REGARD TO A CERTAIN PROCEDURE

OR ACTIVITY, DO THAT UNLESS IT IS CLEARLY INAPPLICABLE TO THE

PROJECT.

10.5. PERFORM CLEANING AFTER NEW DUCTWORK HAS BEEN INSTALLED,

BUT BEFORE TESTING AND BALANCING PROCEDURES HAVE BEEN

PERFORMED. 10.6. OBTAIN CONTRACTING OFFICER'S APPROVAL OF PROPOSED

5.7.1.3.B. MEETS OR EXCEEDS ASTM G22 BACTERIA GROWTH

REQUIREMENTS FOR NO GROWTH, AND PASSES BOTH ASTM

C1338 AND ASTM G21 FUNGI RESISTANCE REQUIREMENTS

FOR NO GROWTH.

5.7.1.3.C. WATER REPELLENCY RATING: INDA IST 80.6-92 ≥ 4.

5.1.2. FITTINGS:

5.1.2.1. ELBOWS, TEES, AND WYES:

5.1.2.1.A. ALL ELBOWS, TEES, AND WYES SHALL BE RADIUS-TYPE

FITTINGS, WITH MINIMUM 1.5 x DIA RADIUS, UNLESS

OTHERWISE INDICATED ON DRAWINGS. IF DUCT VELOCITY IS

GREATER THAN 1,500 FT / MIN, TURN RADIUS MUST BE EQUAL

TO 2.0 x DIA OR GREATER.

5.1.2.1.B. EXCEPTION: WHERE DUCTWORK CONFIGURATION OR

ROUTING REQUIREMENTS PRECLUDE THE USE OF A 1.5 x DIA.

TURNING RADIUS, INSTALL TURNING VANES TO PREVENT

EXCESSIVE PRESSURE DROP THROUGH THE FITTING.

5.1.2.2. TURNING VANES:

5.1.2.2.A. DUCT VELOCITY LESS THAN 1500 FT/MIN: TURNING

VANES SHALL BE SINGLE-WIDTH TYPE, AND SHALL BE

FABRICATED, SPACED, AND INSTALLED PER SMACNA

STANDARDS.

5.1.2.3. TAKEOFFS:

5.1.2.3.A. TAKEOFFS TO DIFFUSERS SHALL BE THE SAME SIZE AS

THE DIFFUSER NECK / OPENING UNLESS NOTED OTHERWISE

ON HVAC DRAWINGS.

5.1.2.3.B. RECTANGULAR OR OVAL DUCTWORK: USE BEVELED

TAKEOFF WITH A MINIMUM 45 DEGREE BEVEL. DO NOT USE

SCOOPS OR AIR DAMS.

5.1.2.3.C. ROUND DUCTWORK: USE CONICAL OR CONICAL

BELLMOUTH “SPIN-IN” TYPE TAKEOFF SUCH AS CROWN CO

3210-DS, 3210-BDS, OR EQUAL, OR USE A WYE LATERAL

TAKEOFF. DO NOT USE “DOVETAIL” TYPE TAKEOFF FITTINGS.

5.1.2.4. DAMPERS:

5.1.2.4.A. ALL BALANCING DAMPERS SHALL BE LOCKING-TYPE

CONSTRUCTED OF GALVANIZED STEEL (MINIMUM 20-GA.

THICKNESS), AND SHALL BE RATED FOR A MINIMUM OF 1.0 IN

WG PRESSURE, 2000 FPM VELOCITY, AND 180°F (82°C).

TESTING AND RATINGS SHALL BE IN ACCORDANCE WITH

AMCA STANDARD 500-D.

5.1.2.5. EQUIPMENT CONNECTIONS:

5.1.2.5.A. PROVIDE MINIMUM 6” FLEXIBLE NEOPRENE-GLASS

FABRIC CONNECTIONS FOR ALL DUCTWORK CONNECTIONS

TO MECHANICAL EQUIPMENT. NEOPRENE MATERIAL MUST BE

UL-LISTED, AND SHALL MEET NFPA-701 / CAN/ULC S109-03

REQUIREMENTS.

5.1.2.5.B. PROVIDE 1” THICK INTERIOR ACOUSTICAL DUCT LINER

FOR AT LEAST 10'-0” DOWNSTREAM OF SUPPLY CONNECTION

AND 10'-0” UPSTREAM OF RETURN CONNECTION OF ALL AIR

HANDLING EQUIPMENT UNLESS NOTED OTHERWISE.

5.1.3. FLEXIBLE DUCTWORK:

5.1.3.1. MAX FLEX DUCTWORK RUN: 6'-0” TO DIFFUSER CONNECTION.

5.1.3.2. WHERE FLEXIBLE DUCTWORK IS CONNECTED TO CEILING

DIFFUSERS, PROVIDE A UL-LISTED PLENUM-RATED DUCT

SUPPORT TO FORM DUCT ELBOW (SUCH AS TITUS FLEXRIGHT OR

EQUIVALENT), INSTALLED PER MANUFACTURER'S INSTRUCTIONS.

ALTERNATIVELY, PROVIDE AN EXTERNALLY-INSULATED,

INDEPENDENTLY-SUPPORTED SHEET METAL ELBOW, OR

INSULATED FLEXIBLE METAL DUCT CONSISTING OF FLEXIBLE

METAL CORE OF CORRUGATED ALUMINUM WITH EXTERNAL

INSULATION. DUCT CONNECTION / ELBOW BEND: MINIMUM ONE DUCT DIAMETER CENTERLINE RADIUS.

3. REFRIGERANT PIPING:

3.1. ALL REFRIGERANT PIPING SHALL BE INSTALLED ACCORDING TO

MANUFACTURER'S RECOMMENDATIONS.

3.2. REFRIGERANT PIPING SHALL BE TYPE-L OR ASTM B280 COPPER TUBING

WITH BRAZED JOINTS. FITTINGS SHALL BE ASME B16.22 WROUGHT

COPPER. REFRIGERANT PIPING SYSTEMS SHALL BE FLOODED WITH

NITROGEN WHEN BRAZING.

3.3. PROVIDE ADDITIONAL REFRIGERANT CHARGE AS NEEDED FOR

RELOCATED HVAC FAN COIL UNIT SYSTEM TO MEET MANUFACTURER'S

REQUIREMENTS AND RECOMMENDATIONS FOR OPTIMAL UNIT

OPERATION.

3.4. REFRIGERANT PIPING MUST BE INSTALLED TIGHT TO STRUCTURE.

3.5. INSTALL VALVES WITH STEMS UPRIGHT OR HORIZONTAL, NOT INVERTED.

3.6. TEST REFRIGERANT PIPING ACCORDING TO MANUFACTURER'S

SPECIFIED TESTING PROCEDURES. AT MINIMUM, TEST UNIT AT A

PRESSURE OF 445 PSIG BY INTRODUCING NITROGEN THROUGHOUT THE

REFRIGERANT CIRCUIT. USE ELECTRONIC PRESSURE GAUGES CAPABLE

OF MEASURING PRESSURE TO A TENTH OF A POUND, AND TEST FOR AT

LEAST ONE HOUR. BUBBLE TEST JOINTS WITH SOAP LATHER, CLEAN

JOINTS OF SOAP AND LEAK-TEST WITH AN ELECTRONIC TYPE LEAK

DETECTOR. PUMP OUT THE SYSTEM, PLACE THE ENTIRE CIRCUIT UNDER

27 INCHES OF VACUUM AND ALLOW TO STAND SEALED OFF FOR A

PERIOD OF ONE HOUR WITHOUT ANY LOSS OF VACUUM.

4. CONDENSATE DRAIN LOCATED ABOVE CEILING AND MECHANICAL ROOMS:

4.1. COPPER TYPE L, HARD DRAWN.

4.2. JOINTS: SOCKET BRAZED.

5. PIPE HANGERS AND SUPPORTS FOR INSULATED PIPING:

5.1. UPPER ATTACHMENT, NEW CONCRETE CONSTRUCTION: USE

ADJUSTABLE INSERTS SIMILAR TO ANVIL FIGURE 282.

5.2. UPPER ATTACHMENT, EXISTING CONCRETE CONSTRUCTION: USE

EXPANSION CASE ANCHOR SIMILAR TO ANVIL FIGURE 117.

5.3. UPPER ATTACHMENT IN STEEL CONSTRUCTION: USE ADJUSTABLE

BEAM CLAMPS AND TIE RODS.

5.4. INTERMEDIATE ATTACHMENT: USE STEEL RODS SIZED PROPERLY FOR

THE PIPE SIZE.

5.5. SPACE PIPE HANGERS AS FOLLOWS:

PIPE SIZE (STEEL): SPACING:

1-1/4" AND SMALLER 7 FT

1-1/2” 9 FT

2” TO 2-1/2” 10 FT

PIPE SIZE (COPPER): SPACING:

UP TO ¾” 5 FT

1” TO 1-1/4” 6 FT

1-1/2” TO 2” 7 FT

PIPE SIZE (PVC): SPACING:

UP TO 2” 5 FT

2” TO 6” 8 FT

EQUIPMENT NOTES:

1. PROVIDE VIBRATION ISOLATION FOR RELOCATED FC-1 AS FOLLOWS:

1.1. PROVIDE COMBINATION NEOPRENE AND SPRING (TYPE H)

VIBRATION HANGERS. SPRING SHALL PERMIT A 15-DEGREE ANGULAR

MISALIGNMENT FROM VERTICAL WITHOUT RUBBING ON HANGER

BOX, OR MAKING ANY OTHER METAL-TO-METAL CONTACT. 2. RELOCATE EXISTING LOCAL DISCONNECT SWITCHES INSTALLED ADJACENT

ELECTRICAL:

1. GENERAL

A. TORQUE ALL ELECTRICAL DEVICE CONNECTIONS TO THE TORQUE

VALUES RECOMMENDED BY THE DEVICE MANUFACTURER. IF THESE

VALUES ARE NOT LISTED, TIGHTEN TO VALUES RECOMMENDED BY UL

STANDARD 486A-B.

2. WIRING:

A. INSTALL ALL WIRING IN CONDUITS.

B. RATED CIRCUIT VOLTAGES: ALL POWER WIRE AND CABLE MUST HAVE

MINIMUM RATED CIRCUIT VOLTAGES IN ACCORDANCE WITH NEMA WC

70, ANSI/NEMA WC 71/ICEA S-96-659, OR NEMA WC 74/ICEA S-93-639 AS

APPLICABLE. POWER WIRE AND CABLE FOR CIRCUIT VOLTAGES RATED

0-600 VOLTS MUST BE RATED NOT LESS THAN 600 VOLTS. CONTROL

WIRE AND CABLE MUST HAVE MINIMUM RATED CIRCUIT VOLTAGES IN

ACCORDANCE WITH NEMA WC 57, BUT MUST BE RATED 600 VOLTS IF

ROUTED IN RACEWAY WITH OTHER CONDUCTORS THAT ARE RATED 600

VOLTS.

C. MATERIAL FOR CONDUCTORS: COPPER, UNLESS NOTED OTHERWISE.

CONDUCTORS MUST CONFORM TO ALL THE APPLICABLE

REQUIREMENTS OF NEMA WC 57, NEMA WC 70, ANSI/NEMA WC 71/ICEA

S-96-659, OR NEMA WC 74/ICEA S-93-639 AS APPLICABLE. COPPER

CONDUCTORS MUST BE ANNEALED COPPER MATERIAL AND THEY MAY

BE BARE, OR TIN- OR LEAD-ALLOY-COATED, IF REQUIRED BY THE TYPE

OF INSULATION USED. INTERMIXING OF COPPER AND ALUMINUM

CONDUCTORS IN THE SAME RACEWAY IS NOT PERMITTED.

D. SIZE / TYPE / STRANDING / COLOR CODING: TO MATCH EXISTING

FEEDERS FOR ALL RELOCATED EQUIPMENT. STRANDED COPPER MAY BE

USED FOR ALL WIRING #8 AWG AND LARGER.

3. CONDUIT

A. ELECTRICAL METALLIC TUBING (EMT): GALVANIZED STEEL CONFORMING

TO ASA C80.3, (FS) WW-C563 AND ULF 797.

B. CONDUIT FITTINGS: CADMIUM-PLATED STEEL OR HOT-DIPPED

GALVANIZED MALLEABLE IRON; COMPRESSION OR SET SCREW TYPE.

C. PROVIDE PULL ROPE IN EMPTY CONDUITS ABANDONED IN PLACE.

4. BOXES

A. GALVANIZED SHEET METAL OR CAST CONSTRUCTION AND SIZED IN

ACCORDANCE WITH NFPA 70 AND BEARING UL LABEL.

B. PROVIDE NEW PULL BOXES, JUNCTION BOXES, AND DEVICE BOXES AS

OUTLINED BY CODE TO RELOCATE THE EQUIPMENT INDICATED.

C. MAINTAIN THE INTEGRITY OF ALL EXISTING CIRCUITS IN SERVICE THAT

MAY BE AFFECTED BY THIS WORK. IDENTIFY ALL SOURCES OF POWER

AND DE-ENERGIZE REQUIRED CIRCUITS PRIOR TO BEGINNING WORK.

D. PROVIDE INDIVIDUAL STRUCTURAL SUPPORTS FOR DISCONNECT

SWITCHES.

5. GROUNDING

A. GROUND ALL ELECTRICAL EQUIPMENT, WIRING, CONDUITS, AND

BUILDING ELEMENTS PER THE REQUIREMENTS OF NFPA 70.

6. IDENTIFICATION

A. IDENTIFY ALL MAJOR JUNCTION BOXES AND CIRCUIT WIRING AT EACH

TERMINATION.

B. PROVIDE UPDATED TYPEWRITTEN PANELBOARD CIRCUIT DIRECTORY IN

PANELBOARD DOOR IDENTIFYING ALL ACTIVE CIRCUITS AND SPARES.

ACTIVE CIRCUITS DESIGNATE EQUIPMENT SERVED.

90° ELBOW WITH TURNING

VANES IN SUPPLY DUCTWORK

VERTICAL

SUPPLY

DUCT

VERTICAL

RETURN

DUCT

MVD

DIFFUSER RUNOUT

45° CLINCH COLLAR (TYP.)

MANUAL VOLUME

DAMPER (TYP.)

0 2025/08/26 HVAC UPDATE CD'S

Croft & Associates 3400 Blue Springs Road, TEMPORARY LOCATIONS FOR LARGE EQUIPMENT.

10.7. DESIGNATE A DECONTAMINATION AREA AND OBTAIN CONTRACTING

OFFICER'S APPROVAL.

10.8. COLLECT DEBRIS REMOVED DURING CLEANING; ENSURE THAT DEBRIS

IS NOT DISPERSED OUTSIDE THE HVAC SYSTEM DURING THE CLEANING

PROCESS.

10.9. RESEAL NEW OPENINGS MADE TO ACCESS AND CLEAN DUCTWORK IN

ACCORDANCE WITH NADCA STANDARD 05.

10.10 SUBMIT A FIELD QUALITY CONTROL REPORT TO THE CONTRACTING

OFFICER. INCLUDE EVIDENCE OF SATISFACTORY CLEANING USING

TESTING AND OBSERVATION METHODS OUTLINED BY NADCA ACR,

INCLUDING NADCA SURFACE COMPARISON TESTING METHOD.

10.11. CONTRACTING OFFICER RESERVES THE RIGHT TO VERIFY

CLEANLINESS USING NADCA ACR SURFACE COMPARISON TESTING OR

NADCA VACUUM TEST. WHEN DIRECTED, RE-CLEAN COMPONENTS

UNTIL THEY PASS. CONTRACTOR SHALL BEAR THE COSTS OF

RETESTING DUE TO INADEQUATE CLEANING.

10.12. DOUBLE-BAG WASTE AND DEBRIS IN 6 MIL, 0.006 INCH THICK

5.1.3.3. DO NOT SUBSTITUTE FLEX DUCTWORK FOR FLEXIBLE

NEOPRENE-GLASS FABRIC FOR VIBRATION ISOLATION AT

MECHANICAL EQUIPMENT.

5.2. DUCT HANGERS AND SUPPORTS:

5.2.1. DUCT HANGERS AND SUPPORTS SHALL BE IN ACCORDANCE WITH

THE HANGERS AND SUPPORTS OF THE REFERENCED SMACNA DUCT

CONSTRUCTION STANDARDS.

5.3. DUCTWORK INSULATION:

5.3.1. FIBERGLASS WRAP INSULATION WITH FACTORY APPLIED VAPOR

BARRIER: INSULATE ALL SUPPLY, RETURN, AND OUTSIDE AIR

DUCTWORK WITH 1.5" THICK WRAP INSULATION, HAVING A THERMAL

CONDUCTIVITY OF 0.27 AT 75°F MEAN TEMPERATURE.

5.4. PIPING INSULATION:

5.4.1. FOAMED PIPE INSULATION WITH MINIMUM 4.5 PCF, AND THERMAL

CONDUCTIVITY OF 0.28 AT 75°F MEAN TEMPERATURE.

5.4.1.1. REFRIGERANT PIPING: 3/4" THICK.

CONTROLS:

TO THE EQUIPMENT SERVED FOR ALL RELOCATED EQUIPMENT.

3. PROVIDE NEW MERV-13 DISPOSABLE PLEATED FILTERS IN FC-1 PRIOR TO

TEST AND BALANCE. AT CONCLUSION OF TEST AND BALANCE, REMOVE AND

DISPOSE OF THE FILTERS, AND PROVIDE NEW REPLACEMENT MERV-13

DISPOSABLE PLEATED FILTERS IN FC-1.

4. INSTALL ALL EQUIPMENT PER MANUFACTURER'S RECOMMENDATIONS.

WHERE MANUFACTURER'S RECOMMENDATIONS DEVIATE FROM THE

DRAWINGS, NOTIFY THE CONTRACTING OFFICER IN WRITING.

INSULATED SHEET METAL DUCT

(ROUND OR RECTANGULAR, AS

SHOWN ON DRAWINGS)

LOCKING BALANCE DAMPER

NOTE:

USE #10x3/4" SELF-TAPPING

CADMIUM-PLATED SHEET

M-102

INTERIOR DUCTWORK DETAIL

NOT TO SCALE

EQUIPMENT

UPSTREAM

TRANSITION

AIRFLOW AIRFLOW

DOWNSTREAM

TRANSITION

Suite 200 Kennesaw, GA 30144

770.529.7714 (p)

770.529.7716 (f) www.croftae.com

POLYETHYLENE PLASTIC BAGS.

10.13. DISPOSE OF DEBRIS OFF-SITE IN ACCORDANCE WITH APPLICABLE

FEDERAL, STATE AND LOCAL REQUIREMENTS.

11. WARRANTIES:

PROVIDE A 12-MONTH (1 YEAR) WARRANTY FOR ALL SYSTEMS AND

EQUIPMENT. WARRANTY PERIOD SHALL BEGIN UPON ACCEPTANCE OF

SYSTEMS BY OWNER.

DUCTWORK:

1. INSTALL ALL NEW CONTROL WIRING.

2. COORDINATE WITH CONTRACTING OFFICER TO REPROGRAM JACE AND UNIT

CONTROLS TO MATCH PREVIOUS SETPOINTS AND SETBACKS. SETPOINTS

AND SETBACKS LISTED BELOW ARE PROVIDED IF NO SETPOINTS OR

SETBACKS ARE AVAILABLE.

2.1. COOLING SETPOINT: 78 DEGREES F

2.2. COOLING SETBACK: 80 DEGREES F

2.3. HEATING SETPOINT: 68 DEGREES F

RIGID DUCT

AFFIX FLEX DUCT TO METAL DUCT WITH

NYLON DRAW TIE. TAPE FLEX DUCT

VAPOR BARRIER TO METAL DUCT (2

WRAPS MINIMUM). TAPE INSULATION

VAPOR BARRIER TO FLEX DUCT VAPOR

METAL SCREWS. TIGHTEN ALL

STRAPS AGAINST DUCT AND

SUPPORT MEMBERS. (TYP.)

HANGER

STRAPS

NO EQUIPMENT IN DUCT EQUIPMENT IN DUCT

APPLIES TO PLAN OR SIDE

VIEW OF DUCT TRANSITION

NOTE: MAXIMUM ANGLES SHOWN APPLY, UNLESS SPECIFICALLY NOTED OTHERWISE ON PLANS,

2 DUCT TRANSITION DETAIL

1. ALL DUCTWORK SHALL BE CONSTRUCTED OF G60 GALVANIZED SHEET METAL

UNLESS INDICATED OTHERWISE.

2. MOUNT ALL DUCTWORK AS CLOSE AS POSSIBLE TO THE UNDERSIDE OF THE

BUILDING STRUCTURE. ALL DUCTWORK SUPPORTS SHALL BE MOUNTED TO

THE BUILDING STRUCTURE.

3. DUCTWORK DIMENSIONS SHOWN ON DRAWINGS ARE INTERNAL AIRFLOW

DIMENSIONS. DUCTWORK OUTER DIMENSIONS SHALL BE INCREASED TO

ACCOMMODATE INTERIOR LINING AS REQUIRED.

4. ALL DUCTWORK AND SHEET METAL SHALL BE FABRICATED AND INSTALLED IN

ACCORDANCE WITH THE MOST RECENT SMACNA STANDARD GUIDELINES.

ADDITIONALLY, THE FOLLOWING REQUIREMENTS APPLY:

4.1. GENERAL DUCTWORK REQUIREMENTS:

4.1.1. PRESSURE CLASSIFICATIONS: 2" W.G. STATIC PRESSURE, CLASS A

SEALS.

2.4. HEATING SETBACK: 55 DEGREES F

3. CONNECT DAMPER CONTROL FOR EXISTING OUTSIDE AIR LOUVER DAMPER

PREVIOUSLY SERVING FC-2 TO RELOCATED FC-1 CONTROLS SO THAT

DAMPER OPENS ON FAN START AND CLOSES ON FAN STOP.

FIRE PROTECTION NOTES:

1. ALL DUCTWORK INSULATION, PIPING INSULATION, AND WIRING SHALL BE

PLENUM-RATED (FLAME INDEX OF 25 OR BETTER, AND A SMOKE INDEX OF 50

OR BETTER, PER ASTM-E84 STANDARDS).

PIPING:

1. GENERAL PIPING NOTES:

1.1. CODES AND STANDARDS: PLASTIC PIPE, FITTINGS, AND COMPONENTS

BARRIER (2 WRAPS MINIMUM).

TO DIFFUSER NECK

WRAP ALL RIGID DUCT W/ FOIL-FACED

FIBERGLASS DUCT WRAP AS INDICATED

IN INSULATION SPECIFICATIONS ON THIS

SHEET.

FASTEN RIGID DUCT TO TAKEOFF

FITTING WITH SHEET METAL SCREWS

M-102 NOT TO SCALE

SUPPORT AUX. DRAIN PAN

FROM STRUCTURE

(FOUR POINT) NEW OR REUSED GALV.

HANGER RODS TO STRUCTURE ABOVE

1.1.1. CONSTRUCT LOW PRESSURE RECTANGULAR DUCTWORK FROM

LOCK FORMING QUALITY GALVANIZED STEEL SHEETS.

1.1.2. CONSTRUCTION METHODS, METAL GAUGES, AND STIFFENING

SHALL BE IN ACCORDANCE WITH THE LATEST EDITION OF SMACNA

DUCT CONSTRUCTION STANDARDS.

1.1.3. LOW PRESSURE ROUND DUCTWORK UP TO AND INCLUDING 12"

SHALL CONFORM TO NSF 14 / ANSI 14.

2. COMBUSTION EXHAUST PIPING: USE ONLY MATERIALS, PIPING, AND

ACCESSORIES LISTED AND LABELED TO UL-1738. STANDARD SCH. 40 PVC

AND DWV PVC PIPING ARE NOT LISTED TO UL-1738, AND ARE

DISALLOWED.

M-102

FLEX DUCT CONNECTION DETAIL

NOT TO SCALE

TOP AND BOTTOM

EXISTING OUTSIDE AIR

DUCT WITH ACTUATED

DAMPER. RECONNECT

TO FC-1 SO DAMPER MD

OPENS ON FAN START

AND CLOSES ON FAN

(FOUR POINT)

SPRING VIBRATION

ISOLATOR (TYP.)

DIAMETER SHALL BE LONGITUDINAL LOCK SEAM CONSTRUCTION.

ROUND DUCTS LARGER THAN 12" SHALL BE SPIRAL LOCK SEAM

CONSTRUCTION.

5.1. DUCTWORK ACCESSORIES:

5.1.1. LINERS:

5.1.1.1. ALL DUCTWORK INDICATED ON DRAWINGS AS HAVING

INTERNAL LINING SHALL USE 1” THICK LINER UNLESS OTHERWISE

INDICATED.

5.1.1.2. ALL LINERS SHALL BE INSTALLED PER MANUFACTURER'S

RECOMMENDATIONS. SEAL ALL EDGES, SEAMS, TEARS, OR

OTHER POTENTIAL LEAKS COMPLETELY AS DIRECTED BY

MANUFACTURER.

5.1.1.3. ALL INTERNAL DUCTWORK LINING SHALL MEET THE

FOLLOWING REQUIREMENTS, UNLESS OTHERWISE NOTED ON

THE DRAWINGS:

5.7.1.3.A. FIRE HAZARD CLASSIFICATION:

1" THICK DUCT LINER

SHEET METAL DUCT

DUCT LINER

SECTIONS OF LINER SHALL

OVERLAP THE SIDES

LINER TO BE ADHERED TO

STOP

CONNECT NEW RETURN AIR

DUCT TO EXISTING RETURN

DUCTS. SEE DRAWINGS.

SLOPE NEW CONDENSATE DRAIN

AT 1/8" PER FOOT TO RECONNECT

TO EXISTING OUTLET.

AIR

FC-1 (RELOCATED)

AIR

CONNECT NEW SUPPLY AIR

DUCT TO EXISTING SUPPLY

DUCTS. SEE DRAWINGS.

NEW OR REUSED

FLEXIBLE NEOPRENE

GLASS CONNX. (TYP)

PROJECT No.

PROJ. OFFICER

2018-173

J. MORGAN

5.7.1.3.A.A. UL 723, ASTM E84, NFPA 255, CAN/ULC-S102

5.7.1.3.A.B. MAX FLAME SPREAD INDEX: 25, MAX SMOKE

DEVELOPED INDEX: 50, AND CLASSIFIED AS “LIMITED

COMBUSTIBL

E” UNDER

NFPA 259

(<3,500 BTU / LB)

NO MORE

THAN 2"

FROM EDGE OF LINER ALL ENDS OF LINER TO BE COATED W/

ADHESIVE (MIRACLE PF 96)

NOTE:

NOT ALL BALANCING DAMPERS ARE SHOWN ON FLOOR PLANS. PROVIDE

BALANCING DAMPERS AT POINTS ON SUPPLY, RETURN, AND EXHAUST

SYSTEMS WHERE BRANCHES ARE TAKEN FROM LARGER DUCTS AS

REQUIRED FOR AIR BALANCING. SEE SPECIFICATIONS SECTION 233300.

C

IV

IL

E N

G

IN

E E

R th

A

IR

L

IF

T W

B

B

IN

S A

IR

R

E S

E R

V E

B A

S E

G

E O

R

/2

/2

:0 :3

M u to d e s k

D o c s /2

-1

D o b b in s A

R B

B ld g

/2

-1

D o b b in s A

R B

B ld g

M

.r v t

E X

IS

T

T S

ID

E

IR

IR

C K

H O

U S

E R

E N

O V

A T

B

IL

D

IN

G

W B

-0

B B

IN

S

A

IR

R E

S E

R V

E B

A S

E

G E

O R

O J E

L

C A

T

H V

A C

S P

E C

IF

IC

A T

IO

N

S A

N D

D E

T A

IL

S

A

W

O

JE

C T

C O

N T

A C

T

R O

B E

R T

E R

N S

T

D S

N

-3 ro b e rt

.e rn s t.

u s .a f.

m il

C O

N T

A https://www.wbdg.org/dod/ufc) http://www.croftae.com/ mailto:robert.ernst.5@us.af.mil

S OF LINER SHALL BE BUTTED DUCT W/ 100% ADHESIVE

(MIRACLE PF 96)

RELOCATED CONDENSATE PUMP

AND AUX. DRAIN PAN

AUXI

LIAR

Y

DRAI

N

PAN.

PRO

VIDE

MOI

STU

RE

SEN

SOR

TO

DEA

CTIV

ATE

FAN

COIL

UNIT

WHE

N

MOI

STU

RE

IS

DET

ECT

ED

IN

DRAI

N

PAN.

DESIGNED CHECKED DATE M. JOHNSON

V. MAZZEI 2025/08/26

4 DUCT LINER DETAIL FIRMLY TOGETHER. 3 HORIZ. FAN COIL UNIT DETAIL DRAWING 2 OF 2

M-102 NOT TO SCALE M-102 NOT TO SCALE M-102

C o p y ri g h t b y C ro ft

A s s o c ia te s In c

A ll ri g h ts r e s e rv e d

T h is d o c u m e n t is p ro p e rt y o f C ro ft

A s s o c ia te s In c

It is t o b e u s e d o n ly f o r th e s p e c ifi c p ro je c t re fe rr e d t o o r id e n tif ie d h e re in a n d is n o t to b e u s e d o n o th e r p ro je c ts in w h o le o r in p a rt , e x c e p t b y th e e x p re s s w ri tt e n a g re e m e n t o f C ro ft

A s s o c ia te s In c