USDA ARS Athens GA Upgrade Chiller - Final Turnover Drawings 03-01-21.pdf

COVER SHEET

U.S. DEPARTMENT OF AGRICULTURE

AGRICULTURAL RESEARCH SERVICE SOUTHEAST AREA

UPGRADE CHILLERS

ATHENS, GEORGIA

FINAL TURNOVER

JANUARY 28, 2021

ENGINEERING

PROGRAM MANAGEMENT

CONSTRUCTION MANAGEMENT

6700A ROCKLEDGE DRIVE, SUITE 301

BETHESDA, MARYLAND 20817

(T) 301-216-2871 (F) 301-216-9671 www.SalasObrien.com

KEY PLANVICINITY MAP - ATHENS, GA DRAWING INDEX

DRAWING NUMBER

DRAWING TITLE:

DRAWN BY:

GES PROJECT NO.:

DATE:

REGISTRATION:

REVISIONS:

PROJECT:

SOF

01-28-21

F20-43

SUBMISSIONS:

USDA PROJECT NO.:

ENGINEERING

PROGRAM MANAGEMENT

CONSTRUCTION MANAGEMENT

6700A ROCKLEDGE DRIVE SUITE 301

BETHESDA, MARYLAND 20817

T: 301.216.2871 (F) 301-216-9671 www.SalasObrien.com

AR EPM:

AGRICULTURAL RESEARCH SERVICES

SOUTHEAST AREA

950 College Station Road

Athens, GA 30605

UPGRADE

CHILLERS

RRC BUILDING

VE

AG-32SD-C-15-0044

1. 95% CD SUBMISSION 11/18/20

2. FINAL TURNOVER 01/28/21

G0.1

DWG TITLE SHEET

G0.1 COVER SHEET 1

M0.1 SYMBOL LEGEND AND GENERAL NOTES - MECHANICAL 2

M2.1 PHASE 1 - DEMO - MECHANICAL 3

M2.2 PHASE 1 - NEW - MECHANICAL 4

M3.1 PHASE 2 - DEMO - MECHANICAL 5

M3.2 PHASE 2 - NEW - MECHANICAL 6

M5.1 CONTROLS - MECHANICAL 7

M5.2 CONTROLS - MECHANICAL 8

M5.3 CONTROLS - MECHANICAL 9

M6.1 SCHEDULES - MECHANICAL 10

M7.1 DETAILS - MECHANICAL 11

M7.2 DETAILS - MECHANICAL 12

E0.1 SYMBOL LEGEND AND GENERAL NOTES - ELECTRICAL 13

E2.1 PHASE 1 - DEMO - ELECTRICAL 14

E2.2 PHASE 1 - NEW - ELECTRICAL 15

E3.1 PHASE 2 - DEMO - ELECTRICAL 16

E3.2 PHASE 2 - NEW - ELECTRICAL 17

E4.1 POWER RISER DIAGRAMS - ELECTRICAL 18

E6.1 SCHEDULES - ELECTRICAL 19

AutoCAD SHX Text N

AutoCAD SHX Text N

AutoCAD SHX Text

AREA OF WORK

AutoCAD SHX Text

PROJECT SITE

NOTES

1. THIS IS A GENERAL COMPILATION OF SYMBOLS AND NOT ALL SYMBOLS SHOWN MAY BE USED ON THE CONTRACT DRAWINGS.

2. SCREENED SYMBOLS OR TEXT (EXAMPLE: AHU) INDICATE EXISTING EQUIPMENT OR CONDITIONS.

3. SCREENED AND DASHED AND LINES INDICATE LINES HIDDEN IN VIEW.

DUCT SMOKE DETECTOR

THERMOSTAT

TEMPERATURE SENSOR

PIPING

MECHANICAL LEGEND

DESCRIPTION

GENERAL

SYMBOL DESCRIPTIONSYMBOL

EQUIPMENT NUMBER

SECTION NUMBER

TYPE OF EQUIPMENT

DETAIL NUMBER

REFERENCE NOTE

AIR FLOW AMOUNT (CFM)

UNDER CUT DOOR

AIR DEVICE TAG

SHEET SECTION APPEARS

SHEET DETAIL APPEARS

X

X

X

X-X

X

X-X

UC

POINT OF DISCONNECTION

POINT OF CONNECTION

HVAC

DESCRIPTIONSYMBOL

BELL MOUTH TAP W/MVD

SQUARE TO ROUND DUCT TRANSITION

DUCT RISE OR DROP IN DIRECTION OF FLOW

RETURN INLET (SEE AIR DEVICE SCHEDULE)

EXHAUST INLET (SEE AIR DEVICE SCHEDULE)

SUPPLY OUTLET (SEE AIR DEVICE SCHEDULE)

MVD HAS REMOTE CONTROL IN RIGID CEILING

SUPPLY DUCT DOWN

EXHAUST DUCT DOWN

RETURN DUCT DOWN

DUCT CONTINUES

FIRE DAMPER (HORIZONTAL)

DUCT ACCESS DOOR - TOP

MANUAL VOLUME DAMPER

SUPPLY DUCT RISER

RETURN DUCT RISER

EXHAUST DUCT RISER

FLEXIBLE DUCT

SINGLE LINE DUCTWORK

TERMINAL UNIT

MOTORIZED DAMPER

CROSS HATCHED AREA = MINIMUM CLEARANCE

FOR HEATER ACCESS. MAINTAIN CLEARANCE.

FIRE DAMPER (VERTICAL)

BACKDRAFT DAMPER

BDD

MVD

FD

FD

LINEAR DIFFUSER

ELBOW W/TURNING VANES

REFRIGERANT SENSOR

SMOKE DAMPER (HORIZONTAL)SD

SD SMOKE DAMPER (VERTICAL)

COMBINATION FIRE/SMOKE DAMPER (HORIZONTAL)F/SD

F/SD COMBINATION FIRE/SMOKE DAMPER (VERTICAL)

ROTATING BEACON LIGHT

PIPE CONTINUATION

PIPE ELBOW DOWN

PIPE ELBOW UP

BLIND FLANGE

CAPPED LINE

HOSE END CONNECTION

DIRECTION OF FLOW IN PIPE

PIPE TEE DOWN

PIPE TEE UP

UNION

BALL VALVE

BUTTERFLY VALVE (MANUAL)

BUTTERFLY VALVE (MOTORIZED)

GATE VALVE

GLOBE VALVE

TRIPLE DUTY VALVE

PLUG VALVE

2-WAY DDC CONTROL VALVE

3-WAY DDC CONTROL VALVE

BALANCING VALVE WITH PRESSURE TAPS

PRESSURE REDUCING VALVE

PRESSURE RELIEF VALVE

FLOW BALANCING VALVE

MANUAL AIR RELIEF VENT

AUTOMATIC AIR RELIEF VENT

FLEXIBLE CONNECTION

CHECK VALVE

Y-STRAINER

PRESSURE/TEMPERATURE TEST PORT

PRESSURE GAUGE

THERMOMETER

PUMP

BASKET STRAINER W/ CLAMPED COVER

SUCTION DIFFUSER

DUCT-MOUNTED SMOKE DETECTOR

DUCT ACCESS DOOR - BOTTOM

DUCT ACCESS DOOR - SIDE

24x12

24x12Ø

24Ø ROUND DUCT, DIAMETER SHOWN (IN INCHES)

RECTANGULAR DUCT, FIRST FIGURE IS

DIMENSION OF SIDE SHOWN (IN INCHES)

FLAT OVAL DUCT, FIRST FIGURE IS

DIMENSION OF SIDE SHOWN (IN INCHES)

SMOKE DETECTOR A/V ANNUNCIATOR

OS&Y GATE VALVE

BALANCING VALVE

FLOW METER

CS-A

100 CFM

MARK - TYPE OR (INxIN)

AIRFLOW (CFM)

1 D1

OR

SS/12X6

100 CFM

OR

AN

SD

R

T

TS

SD

M

M

M

M

S

SOLENOID CONTROL VALVE

MECHANICAL ABBREVIATIONS

AC

DESCRIPTIONABBREV.

ALTERNATING CURRENT

AFF ABOVE FINISHED FLOOR

AMP AMPERE

ANSI AMERICAN NATIONAL STANDARDS INSTITUTE

ASHRAE AMERICAN SOCIETY OF HEATING, REFRIGERATING

AND AIR CONDITIONING ENGINEERS

ASME AMERICAN SOCIETY OF MECHANICAL ENGINEERS

A/V AUDIBLE/VISUAL

BDD BACKDRAFT DAMPER

BHP BRAKE HORSEPOWER

BLDG BUILDING

BMS BUILDING MANAGEMENT SYSTEM

BTU BRITISH THERMAL UNITS

CFM CUBIC FEET PER MINUTE

CxA COMMISSIONING AGENT

D DEPTH

DB DRY BULB

DC DIRECT CURRENT

DDC DIRECT DIGITAL CONTROL

DEG F DEGREE FAHRENHEIT

DIA DIAMETER

EA EXHAUST AIR, EACH

EAT ENTERING AIR TEMPERATURE

ECM ELECTRICALLY COMMUTATED MOTOR

dB DECIBEL

EFF EFFICIENCY

EER ENERGY EFFICIENCY RATIO

EF EXHAUST FAN

ESP EXTERNAL STATIC PRESSURE

ETC ET CETERA

FD FIRE DAMPER, FLOOR DRAIN

FLA FULL LOAD AMPS

FPM FEET PER MINUTE

FPS FEET PER SECOND

FT FEET

FT-H2O FEET OF WATER

GA GAGE

GAL GALLON

GPM GALLONS PER MINUTE

H HEIGHT

HB HOSE BIBB

H-O-A HAND-OFF-AUTOMATIC

HP HORSEPOWER

HR HOUR

HVAC HEATING, VENTILATING, AND AIR CONDITIONING

HZ HERTZ

IN INCH

IN.W.G. INCHES OF WATER - GAUGE

IPS IRON PIPE SIZE

KW KILOWATT

L LENGTH

LAT LEAVING AIR TEMPERATURE

LBS POUNDS

LF LINEAR FEET

MAX MAXIMUM

MBH THOUSAND BTU PER HOUR

MCA MINIMUM CURRENT AMPACITY

MIN MINIMUM

MOCP MAXIMUM OVERCURRENT PROTECTION

MSS MANUFACTURERS STANDARDIZATION SOCIETY

MVD MANUAL VOLUME DAMPER

N/A NOT APPLICABLE, NONE ASSOCIATED, NONE

AVAILABLE

NC NOISE CRITERIA, NORMALLY CLOSED

NFPA NATIONAL FIRE PROTECTION ASSOCIATION

NIC NOT IN CONTRACT

NTS NOT TO SCALE

OA OUTDOOR AIR

PH PHASE

PRV PRESS RELIEF VALVE, PRESS REGULATING VALVE

PVC POLYVINYL CHLORIDE

QTY QUANTITY

RA RETURN AIR

RH RELATIVE HUMIDITY

RLA RUNNING LOAD AMPS

RM ROOM

RPM REVOLUTIONS PER MINUTE

SA SUPPLY AIR

SD SMOKE DETECTOR

SEER SEASONAL ENERGY EFFICIENCY RATIO

SF SQUARE FEET

SMACNA SHEET METAL AND AIR CONDITIONING

CONTRACTORS NATIONAL ASSOCIATION

SP STATIC PRESSURE

STD STANDARD

T THERMOSTAT

TSP TOTAL STATIC PRESSURE

TYP TYPICAL

UH UNIT HEATER

UL UNDERWRITERS LABORATORIES

UNO UNLESS NOTED OTHERWISE

V VOLTAGE

VA VOLT AMPERE

VAV VARIABLE AIR VOLUME

VFD VARIABLE FREQUENCY DRIVE

W WATT, WIDTH

WB WET BULB

WWF WELDED WIRE FABRIC

YR YEAR

B BOILER

CH CHILLER

CHWR CHILLED WATER RETURN

CHWS CHILLED WATER SUPPLY

CT COMPRESSION TANK

CWR CONDENSER WATER RETURN

CWS CONDENSER WATER SUPPLY

EWT ENTERING WATER TEMPERATURE

FCU FAN COIL UNIT

GPD GALLONS PER DAY

GPH GALLONS PER HOUR

LWT LEAVING WATER TEMPERATURE

NO NUMBER, NORMALLY OPEN

OAT OUTDOOR AIR TEMPERATURE

OZ OUNCE

P PUMP

PPM PARTS PER MILLION

PRESS PRESSURE

PSI POUNDS PER SQUARE INCH

PSI-A POUNDS PER SQUARE INCH - ABSOLUTE

PSI-G POUNDS PER SQUARE INCH - GAUGE

RPZ REDUCED PRESSURE ZONE

GENERAL NOTES

1. PROVIDE ALL MATERIALS AND EQUIPMENT AND PERFORM ALL LABOR REQUIRED TO INSTALL COMPLETE AND

OPERABLE HEATING, VENTILATION, AND AIR CONDITIONING (HVAC) SYSTEMS.

2. THE CONTRACTOR IS EXPECTED TO ORDER MATERIALS IN SUFFICIENT TIME TO AVOID DELAYING THE COMPLETION

OF THE PROJECT. DELAY IN DELIVERIES WILL NOT BE CONSIDERED A JUSTIFIABLE REASON FOR SUBSTITUTION OF

MATERIALS.

3. THE CONTRACTOR SHALL COMPLY WITH THE FOLLOWING CODES:

a. INTERNATIONAL BUILDING CODE 2018 EDITION

b. INTERNATIONAL RESIDENTIAL CODE 2018 EDITION

c. INTERNATIONAL PLUMBING CODE 2018 EDITION

d. INTERNATIONAL MECHANICAL CODE 2018 EDITION

e. INTERNATIONAL FUEL GAS CODE 2018 EDITION

f. INTERNATIONAL ENERGY CONSERVATION CODE 2015 EDITION

g. INTERNATIONAL FIRE CODE 2018 EDITION

h. NATIONAL ELECTRICAL CODE 2017 EDITION

4. ALL REQUESTS FOR INFORMATION (RFI'S) SUBMITTED BY THE CONTRACTOR SHALL INCLUDE A PROPOSED

SOLUTION.

5. INSTALLATION OF EQUIPMENT SHALL COMPLY WITH EQUIPMENT MANUFACTURER'S INSTALLATION AND CLEARANCE

REQUIREMENTS. THE CONTRACTOR SHALL VERIFY INSTALLATION CLEARANCES WILL BE MAINTAINED AND

DISCREPANCIES SHALL BE REPORTED TO THE ENGINEER PRIOR TO THE ACQUISITION OF EQUIPMENT.

6. THE GENERAL CONTRACTOR SHALL COORDINATE THE WORK OF THE DIFFERENT TRADES SO THAT INTERFERENCE

BETWEEN HVAC, PIPING, EQUIPMENT, STRUCTURAL, AND ELECTRICAL WORK WILL BE AVOIDED. ALL NECESSARY

OFFSETS AND FITTINGS REQUIRED TO INSTALL THE WORK PROPERLY SHALL BE PROVIDED COMPLETE IN PLACE AT

NO ADDITIONAL COST TO THE DESIGN TEAM OR OWNER.

7. THE CONTRACTOR IS RESPONSIBLE TO REPAIR, AT HIS COST, ANY DAMAGED ITEMS DUE TO WORK PERFORMED.

DAMAGED ITEMS SHALL BE BROUGHT BACK TO LIKE-NEW CONDITION OR REPLACED WITH ORIGINAL.

8. PIPING AND EQUIPMENT LOCATIONS SHOWN ARE SCHEMATIC. PRIOR TO LAYOUT AND CONSTRUCTION OF THE

MECHANICAL SYSTEMS, THE CONTRACTOR SHALL SUBMIT LAYOUT AND FABRICATION SHOP DRAWINGS FOR

APPROVAL. CONTRACTOR SHALL NOT COMMENCE WORK WITHOUT APPROVED SHOP DRAWINGS ON THE

CONSTRUCTION SITE.

9. INSULATE ALL SURFACES SUBJECT TO CONDENSATION. IN ADDITION TO PIPES AND APPURTENANCES, THIS

INCLUDES SURFACES OF THE CHILLER WHICH MAY REQUIRE FLEXIBLE ELASTOMERIC INSULATION.

10. PROVIDE COLD GALVANIZED PAINT ON ALL FIELD CUTS/WELDS OF GALVANIZED STEEL SUPPORTS AND THREADED

RODS.

11. ALL ELECTRICAL WORK SHALL CONFORM TO THE LATEST EDITION OF THE NATIONAL ELECTRICAL CODE (NFPA 70).

THE EQUIPMENT INDICATED ON THE DRAWINGS HAS BEEN COORDINATED WITH THE ELECTRICAL SYSTEMS. IF THIS

CONTRACTOR SELECTS TO USE ALTERNATE EQUIPMENT, HE SHALL BE RESPONSIBLE FOR ALL COORDINATION

WITH THE ELECTRICAL ENGINEER AND SHALL BEAR ANY ADDED EXPENSE TO THE ELECTRICAL CONTRACTOR AND

CONSULTANTS RESULTING FROM SUCH ALTERNATE SELECTION.

GENERAL PHASING NOTES

1. THE CONTRACT DOCUMENTS ARE DIVIDED INTO 2 PHASES. IN ADDITION TO THE MECHANICAL CONTRACTOR'S

SCOPE, WORK WILL BE REQUIRED BY THE CONTROLS CONTRACTOR AND TEST AND BALANCE CONTRACTOR IN

BOTH PHASES.

2. THIS PROJECT OCCURS IN AN EXISTING FACILITY THAT SHALL REMAIN IN OPERATION DURING CONSTRUCTION.

COORDINATION OF ALL WORK WITH THE OWNER SHALL BE REQUIRED. OUTAGES OF SHORT DURATION WILL BE

ALLOWED AT THE SOLE DIRECTION OF THE OWNER. THE CONNECTION TO THE EXISTING CHILLED WATER PIPING

SHALL USE LINE-STOPS WITH BYPASSES TO MINIMIZE, IF NOT COMPLETELY ELIMINATE, THE DISRUPTION OF

CHILLED WATER PRODUCTION TO THE BUILDINGS SERVED BY THE CENTRAL PLANT.

3. THE CONTRACTOR SHALL INCLUDE THE USE OF A TEMPORARY AIR-COOLED CHILLER AND PUMPING PACKAGE TO

PROVIDE CHILLED WATER TO THE BUILDING WHILE THE CENTRAL COOLING PLANT IS OUT OF SERVICE. THE

MINIMUM REQUIREMENTS FOR THE TEMPORARY EQUIPMENT IS LISTED AS FOLLOWS:

a. CAPACITY: 800 TONS

b. FLOW: 1,920

c. PUMP HEAD: 70 FT-H20

d. POWER: 460V/3PH/60HZ

4. THE MECHANICAL WORK ASSOCIATED WITH THESE PHASES IS DETAILED AND SUMMARIZED ON SHEETS M2.1, M2.2, M3.1, AND M3.2. A GENERAL SUMMARY OF THE MECHANICAL PORTION OF THE PHASING IS AS FOLLOWS:

a. PHASE 1: IN GENERAL, THE MECHANICAL SCOPE IS AS FOLLOWS:

1) REPLACE THE COOLING TOWERS.

2) REPLACE CONDENSER WATER PIPING AND ADD COOLING TOWER BYPASS PIPES AT THE COOLING TOWERS.

3) RELOCATE AND REPLACE CONDENSER WATER PUMPS.

4) PREPARE PLANT FOR FUTURE PHASES.

5) REFER TO E-SHEETS FOR ELECTRICAL MODIFICATIONS ASSOCIATED WITH PHASE 1.

b. PHASE 2: IN GENERAL, THE MECHANICAL SCOPE IS AS FOLLOWS:

1) REPLACE CHILLER CH-2 AND PUMP CHWP-2.

2) REFER TO E-SHEETS FOR ELECTRICAL MODIFICATIONS ASSOCIATED WITH PHASE 2.

GENERAL DEMOLITION AND RENOVATION NOTES

1. THE CONTRACTOR SHALL COORDINATE THE LOCATION OF SITE MOBILIZATION WITH THE OWNER PRIOR TO

COMMENCING THE WORK.

2. THE MECHANICAL CONTRACTOR SHALL BE RESPONSIBLE FOR THE DEMOLITION OF EXISTING MECHANICAL

SYSTEMS AS REQUIRED TO PERFORM NEW MECHANICAL WORK. NOTHING TAKEN OUT OF SERVICE UNDER THIS

PROJECT SHALL BE ABANDONED IN PLACE. ALL DEBRIS SHALL BECOME THE PROPERTY OF THE CONTRACTOR AND

BE REMOVED FROM THE SITE.

3. THE CONTRACTOR SHALL MAINTAIN AREAS NOT DIRECTLY IMPACTED BY THE WORK DUST-FREE DURING THE LIFE

OF THE PROJECT. THE CONTRACTOR SHALL PROVIDE ALL DUST CONTROL/PREVENTION SYSTEMS AS REQUIRED TO

COMPLETE DEMOLITION, CONSTRUCTION, AND INSTALLATION OF NEW SYSTEMS. THE CONTRACTOR SHALL CLEAN

UP NIGHTLY SO AS NOT TO IMPACT THE BUILDING'S EMPLOYEES DURING THE WORK WEEK.

GENERAL NOTES

RMS REFRIGERANT MONITORING SYSTEM

M0.1

SYMBOL LEGEND

AND GENERAL

NOTES -

MECHANICAL

DRAWING NUMBER

DRAWING TITLE:

DRAWN BY:

GES PROJECT NO.:

DATE:

REGISTRATION:

REVISIONS:

PROJECT:

SOF

01-28-21

F20-43

SUBMISSIONS:

USDA PROJECT NO.:

ENGINEERING

PROGRAM MANAGEMENT

CONSTRUCTION MANAGEMENT

6700A ROCKLEDGE DRIVE SUITE 301

BETHESDA, MARYLAND 20817

T: 301.216.2871 (F) 301-216-9671 www.SalasObrien.com

AR EPM:

AGRICULTURAL RESEARCH SERVICES

SOUTHEAST AREA

950 College Station Road

Athens, GA 30605

UPGRADE

CHILLERS

RRC BUILDING

VE

AG-32SD-C-15-0044

1. 95% CD SUBMISSION 11/18/20

2. FINAL TURNOVER 01/28/21

AutoCAD SHX Text

DROP

RISE

X9 X10 X11 X12X8

XA

XB

XC

XE

X7X6

D2

CWP

CH

CT

D5

D2

D2

D1

CHWP

1. IN GENERAL, THE MECHANICAL SCOPE OF PHASE 1 IS AS FOLLOWS:

a. CHILLED WATER SHALL BE PROVIDED TO THE DISTRIBUTION SYSTEM

UNINTERRUPTED THROUGHOUT CONSTRUCTION.

b. INSTALL LINE-STOPS WITH BYPASSES TO KEEP PLANT OPERATIONAL

DURING CONSTRUCTION.

c. INSTALL PLANT ISOLATION VALVES AND TAPS FOR A TEMPORARY CHILLER

CONNECTION.

d. PROVIDE AN AIR-COOLED CHILLER AND PUMP PACKAGE TO PROVIDE

CHILLED WATER WHILE THE PLANT IS OUT OF SERVICE.

e. REPLACE THE COOLING TOWERS.

f. REPLACE CONDENSER WATER PIPING AND ADD COOLING TOWER BYPASS

PIPES AT THE COOLING TOWERS.

g. RELOCATE AND REPLACE CONDENSER WATER PUMPS.

h. MODIFY CONDENSER WATER PIPING CONNECTIONS AT CH-2.

i. PRESSURE TEST AND CLEAN ALL NEW PIPING BEFORE WATER IS

ALLOWED TO CIRCULATE THROUGH THE SYSTEM.

j. ADD ISOLATION VALVES IN THE CHILLED WATER PIPE TO MINIMIZE PLANT

DOWNTIME DURING FUTURE WORK .

k. COORDINATE CHEMICAL TREATMENT EQUIPMENT MODIFICATIONS FOR

THE COOLING TOWER WITH THE EXISTING CHEMICAL PROVIDER.

l. TEST AND BALANCE PER THE PHASE 1 SCOPE OUTLINED IN THE

SPECIFICATIONS.

m. UPDATE CONTROLS AND SEQUENCES FOR THE INTEGRATION OF THE

REPLACEMENT EQUIPMENT.

2. THE CHEMICAL TREATMENT SYSTEM IS NOT BEING MODIFIED AS PART OF

THIS PROJECT. THE INTENT IS TO DISCONNECT AND RECONNECT.

COORDINATE WITH THE OWNER'S CHEMICAL VENDOR TO MANAGE THE

CHEMICALS DURING THE CONSTRUCTION PROCESS. USE ONLY CLEANING

AND FLUSHING AGENTS APPROVED BY THE CHEMICAL VENDOR. THE

MECHANICAL CONTRACTOR SHALL PROVIDE AND INSTALL THREAD-O-LET

TAPS IN THE NEW PIPING FOR ALL REQUIRED CHEMICAL TREATMENT

CONNECTIONS.

GENERAL NOTES - PHASE 1

REFERENCE NOTES - PHASE 1 - DEMO

D1

INSTALL LINE-STOPS WITH BYPASSES TO KEEP PLANT OPERATIONAL

DURING CONSTRUCTION. INSTALL NEW 10-INCH DIAMETER PIPE AND TEE

IN BETWEEN LINE-STOPS WITH 10-INCH DIAMETER LUG-STYLE BUTTERFLY

ISOLATION VALVE FACING DOWN. INSTALL A MANUAL OPERATOR ON THE

LINE STOP VALVE ON THE CHILLER-SIDE AND USE THIS AS A MEANS TO

ISOLATE THE CHILLERS FROM THE BUILDING DISTRIBUTION SYSTEM. USE

THE NEW TEE CONNECTIONS TO PIPE IN CHILLED WATER FROM A

TEMPORARY AIR-COOLED CHILLER WITH PUMP PACKAGE.

DISCONNECT PIPING AND PREPARE FOR CONNECTION OF NEW.

THE EXISTING REFRIGERANT MONITORING SYSTEM SHALL REMAIN IN

SERVICE.

DEMOLISH PUMP AND HOUSEKEEPING PAD. GRIND FLOOR AND PATCH

FLOOR SMOOTH AND LEVEL TO MATCH ADJACENT FLOOR. PREP AND

APPLY EPOXY FINISH TO FLOOR TO MATCH EXISTING FLOOR COATING.

DEMOLISH COOLING TOWER, ACCESS PLATFORMS, AND MISCELLANEOUS

SUPPORT STEEL. CONCRETE SUPPORTS WALLS SHALL REMAIN AND BE

PROTECTED DURING THE CONSTRUCTION PROCESS.

· DISCONNECT MAKE-UP WATER CONNECTION AND PREPARE FOR

CONNECTION TO NEW TOWER.

· EXISTING DRAIN PIPE BELOW TOWER IS TO REMAIN AND BE REUSED.

D2

D3

D4

D5

D3

D4

CWP

D4

D2

D2

D1

12" UNDERGROUND CWS

PIPE EXISTING-TO-REMAIN

EXISTING AIR

COMPRESSOR

A/C/ EQUIPMENT ROOM

BOILER ROOM

ELECTRICAL ROOM

OFFICE/CONTROL ROOM

GENERATOR ROOM

D2

CHWP

D2

D2

D2

CH

M2.1

PHASE 1 - DEMO -

MECHANICAL

DRAWING NUMBER

DRAWING TITLE:

DRAWN BY:

GES PROJECT NO.:

DATE:

REGISTRATION:

REVISIONS:

PROJECT:

SOF

01-28-21

F20-43

SUBMISSIONS:

USDA PROJECT NO.:

ENGINEERING

PROGRAM MANAGEMENT

CONSTRUCTION MANAGEMENT

6700A ROCKLEDGE DRIVE SUITE 301

BETHESDA, MARYLAND 20817

T: 301.216.2871 (F) 301-216-9671 www.SalasObrien.com

AR EPM:

AGRICULTURAL RESEARCH SERVICES

SOUTHEAST AREA

950 College Station Road

Athens, GA 30605

UPGRADE

CHILLERS

RRC BUILDING

VE

AG-32SD-C-15-0044

1. 95% CD SUBMISSION 11/18/20

2. FINAL TURNOVER 01/28/21

0' 8'2' 4'

GRAPHIC SCALE

1/8"=1'-0"

M2.1

PHASE 1 - DEMO - MECHANICAL

1/8"=1'-0"

XB

XC

XE

X7X6

CH

GENERAL NOTES - PHASE 1

REFERENCE NOTES - PHASE 1 - NEW

INSTALL BLIND FLANGES ON NEW EMERGENCY CHILLED WATER

CONNECTIONS AND INSULATE AND JACKET AFTER TEMPORARY CHILLER

IS DISCONNECTED.

CONNECT NEW PIPING TO EXISTING.

NEW PUMP ON INERTIA PAD SECURED TO NEW CONCRETE

HOUSEKEEPING PAD. COORDINATE HOUSEKEEPING PAD HEIGHT TO

ALIGN SUCTION DIFFUSER PIPE CONNECTION WITH INCOMING

CONDENSER WATER SUPPLY PIPE ELEVATION.

NEW COOLING TOWER, ACCESS PLATFORMS, AND MISCELLANEOUS

SUPPORT STEEL.

· CONNECT MAKE-UP WATER TO EXISTING CONNECTION.

· ROUTE OVERFLOW PIPING AND COOLING TOWER DRAIN PIPING TO

EXISTING DRAIN RISER BELOW TOWER.

BASKET STRAINER WITH CLAMPED COVER AND ISOLATION VALVES

SUPPORTED BY NEW CONCRETE HOUSEKEEPING SLAB BELOW. REFER TO

DETAIL ON M7.1 FOR MORE INFORMATION.

COOLING TOWER BYPASS PIPE TERMINATED INDIRECTLY INTO COOLING

TOWER BASIN. PIPE SHALL TERMINATE 6-INCHES ABOVE TOP LIP OF BASIN

IN ORDER TO MAINTAIN AN AIR GAP.

INSTALL A BALANCING VALVE AT EACH CONDENSER WATER RETURN

COOLING TOWER CONNECTION.

NEW TEE WITH 10-INCH-DIAMETER LUG STYLE ISOLATION VALVE FOR

FUTURE CHILLER 1 REPLACEMENT. INSTALL A BLIND FLANGE AND

INSULATE AND JACKET.

INSTALL NEW 12-INCH DIAMETER ISOLATION VALVE COORDINATED WITH

THE LOCATION FOR THE FUTURE NEW CHILLER AND ROUTE NEW,

TEMPORARY, 8-INCH DIAMETER PIPING TO EXISTING CHILLER. THIS

TEMPORARY PIPING WILL BE REPLACED WITH NEW 12-INCH DIAMETER

PIPING AND ACCESSORIES IN PHASE 2. EXISTING PIPE APPURTENANCES

CAN BE SALVAGED AND REUSED FOR THE TEMPORARY PIPING BUT THE

FINAL INSTALLATION SHALL HAVE ALL NEW PIPE APPURTENANCES.

GENERAL LOCATION OF PUMP VFD, COORDINATE EXACT LOCATION WITH

ELECTRICAL DRAWINGS TO ENSURE PROPER CLEARANCES ARE

MAINTAINED. DIV 23 CONTRACTOR SHALL PROVIDE AND MOUNT THE VFD,

THE DIV 26 CONTRACTOR SHALL INSTALL THE VFD.

THE EXISTING STARTERS ARE BEING DEMOLISHED AS PART OF THE

PHASE 1 ELECTRICAL WORK. THE NEW VFD SHALL BE SIZED FOR FUTURE

PUMP INSTALLATION BUT BALANCED TO OPERATE AT CONSTANT SPEED

TO PROVIDE THE REQUIRED CHILLED WATER FLOW FOR THE EXISTING

CHILLER SERVED. THE VFD WILL BE REBALANCED WHEN THE NEW PUMPS

ARE INSTALLED IN THE FUTURE.

COORDINATE MOUNTING OF VFD TO ENSURE PROPER CLEARANCES WILL

BE MAINTAINED WITH THE EXISTING PUMP, AND THE LOCATION OF THE

NEW PUMP TO BE INSTALLED PHASE 2.

NEW 10-INCH-DIAMETER BUTTERFLY ISOLATION VALVE.

NEW 12-INCH-DIAMETER BUTTERFLY ISOLATION VALVE.

CWP

CWP

CT

CT

8"

12"

12"

12"

12"

12"

10"

M V

MV

MV

M V

SERVICE LADDER WITH SAFETY

CAGE TO TOP PLATFORM

SAFETY RAIL ON

TOP ALL AROUND

COOLING TOWER CT-1

PACKAGED CONTROLLER

COOLING TOWER CT-2

PACKAGED CONTROLLER

12" UNDERGROUND CWS

PIPE EXISTING-TO-REMAIN

12"

12"

EXISTING AIR

COMPRESSOR

A/C/ EQUIPMENT ROOM

BOILER ROOM

ELECTRICAL ROOM

OFFICE/CONTROL ROOM

GENERATOR ROOM

(TYP 4)

EXISTING CONCRETE

SUPPORT WALL

NEW W12x50 GALVANIZED

STEEL SUPPORT (TYP 2)

REFER TO COOLING TOWER MANUFACTURER'S INSTALLATION

INSTRUCTIONS FOR SUPPORT LOCATION AND SPACING

COOLING TOWER OUTLINE

ENLARGED DETAIL AREA

3/4" DIA HILTI EPOXY ANCHOR

WITH 8-INCH EMBED (TYP 2)

EQUAL

EXISTING CONCRETE

SUPPORT WALL

NEW W12x50 COOLING

TOWER SUPPORT BEAM

MINIMUM 9-INCH OVERHANG

2 SIDES

NEW PLATE 1/2"x8"x16"

1/4

ALL STEEL SHALL

BE GALVANIZED

CL

REFER TO COOLING TOWER

MANUFACTURER'S INSTALLATION

INSTRUCTIONS FOR ATTACHMENT

REQUIREMENTS

EXISTING CONCRETE

SUPPORT WALL

1. IN GENERAL, THE MECHANICAL SCOPE OF PHASE 1 IS AS FOLLOWS:

a. CHILLED WATER SHALL BE PROVIDED TO THE DISTRIBUTION SYSTEM

UNINTERRUPTED THROUGHOUT CONSTRUCTION.

b. INSTALL LINE-STOPS WITH BYPASSES TO KEEP PLANT OPERATIONAL

DURING CONSTRUCTION.

c. INSTALL PLANT ISOLATION VALVES AND TAPS FOR A TEMPORARY CHILLER

CONNECTION.

d. PROVIDE AN AIR-COOLED CHILLER AND PUMP PACKAGE TO PROVIDE

CHILLED WATER WHILE THE PLANT IS OUT OF SERVICE.

e. REPLACE THE COOLING TOWERS.

f. REPLACE CONDENSER WATER PIPING AND ADD COOLING TOWER BYPASS

PIPES AT THE COOLING TOWERS.

g. RELOCATE AND REPLACE CONDENSER WATER PUMPS.

h. MODIFY CONDENSER WATER PIPING CONNECTIONS AT CH-2.

i. ADD ISOLATION VALVES IN THE CHILLED WATER PIPE TO MINIMIZE PLANT

DOWNTIME DURING FUTURE WORK .

j. PRESSURE TEST AND CLEAN ALL NEW PIPING BEFORE WATER IS

ALLOWED TO CIRCULATE THROUGH THE SYSTEM.

k. COORDINATE CHEMICAL TREATMENT EQUIPMENT MODIFICATIONS FOR

THE COOLING TOWER WITH THE EXISTING CHEMICAL PROVIDER.

l. TEST AND BALANCE PER THE PHASE 1 SCOPE OUTLINED IN THE

SPECIFICATIONS.

m. UPDATE CONTROLS AND SEQUENCES FOR THE INTEGRATION OF THE

REPLACEMENT EQUIPMENT.

2. THE CHEMICAL TREATMENT SYSTEM IS NOT BEING MODIFIED AS PART OF

THIS PROJECT. THE INTENT IS TO DISCONNECT AND RECONNECT.

COORDINATE WITH THE OWNER'S CHEMICAL VENDOR TO MANAGE THE

CHEMICALS DURING THE CONSTRUCTION PROCESS. USE ONLY CLEANING

AND FLUSHING AGENTS APPROVED BY THE CHEMICAL VENDOR. THE

MECHANICAL CONTRACTOR SHALL PROVIDE AND INSTALL THREAD-O-LET

TAPS IN THE NEW PIPING FOR ALL REQUIRED CHEMICAL TREATMENT

CONNECTIONS.

CHWP

V F

D V

F D

V F

D V

F D

V F

D V

F D

V F

D

V F

D

CH

CHWP

M2.2

PHASE 1 - NEW -

MECHANICAL

DRAWING NUMBER

DRAWING TITLE:

DRAWN BY:

GES PROJECT NO.:

DATE:

REGISTRATION:

REVISIONS:

PROJECT:

SOF

01-28-21

F20-43

SUBMISSIONS:

USDA PROJECT NO.:

ENGINEERING

PROGRAM MANAGEMENT

CONSTRUCTION MANAGEMENT

6700A ROCKLEDGE DRIVE SUITE 301

BETHESDA, MARYLAND 20817

T: 301.216.2871 (F) 301-216-9671 www.SalasObrien.com

AR EPM:

AGRICULTURAL RESEARCH SERVICES

SOUTHEAST AREA

950 College Station Road

Athens, GA 30605

UPGRADE

CHILLERS

RRC BUILDING

VE

AG-32SD-C-15-0044

1. 95% CD SUBMISSION 11/18/20

2. FINAL TURNOVER 01/28/21

0' 8'2' 4'

GRAPHIC SCALE

1/8"=1'-0"

M2.2

PHASE 1 - NEW - MECHANICAL

XB

XC

XE

X7X6 X9 X10 X11 X12X8

XA

XB

XC

XE

X7X6

CH

D5

D4

D2

CWP

CWP

CT

CT

8"

12"

12"

12"

12"

10"

M V

MV

MV

M V

12" UNDERGROUND CWS

PIPE EXISTING-TO-REMAIN

12"

12"

EXISTING AIR

COMPRESSOR

A/C/ EQUIPMENT ROOM

BOILER ROOM

ELECTRICAL ROOM

OFFICE/CONTROL ROOM

GENERATOR ROOM

REFERENCE NOTES - PHASE 2 - DEMO

D1

DISCONNECT PIPING AND PREPARE FOR CONNECTION OF NEW.

DEMOLISH CH-2 REFRIGERANT RELIEF DISCHARGE PIPE AND PATCH HOLE

IN EXTERIOR WALL WITH 18 GA GALVANIZED STEEL SHEET METAL PATCH.

PATCH SHALL BE LOCATED ON THE EXTERIOR SECURED AND SEALED

WEATHER-TIGHT. COAT PATCH METAL WITH 2 COATS OF GALVANIZING

PRIMER AND PAINT TO MATCH BUILDING EXTERIOR.

THE EXISTING REFRIGERANT MONITORING SYSTEM SHALL REMAIN IN

SERVICE TO MONITOR FOR LEAKS FROM CHILLER CH-1.

DEMOLISH PUMP AND HOUSEKEEPING PAD. GRIND FLOOR AND PATCH

FLOOR SMOOTH AND LEVEL TO MATCH ADJACENT FLOOR. PREP AND

APPLY EPOXY FINISH TO FLOOR TO MATCH EXISTING FLOOR COATING.

DEMOLISH CHILLER CH-2 AND PATCH HOLES AND IMPERFECTIONS IN

HOUSEKEEPING PAD.

D2

D3

D4

D5

D3

1. IN GENERAL, THE MECHANICAL SCOPE OF PHASE 2 IS AS FOLLOWS:

a. CHILLED WATER SHALL BE PROVIDED TO THE DISTRIBUTION SYSTEM

UNINTERRUPTED THROUGHOUT CONSTRUCTION.

b. PROVIDE AN AIR-COOLED CHILLER AND PUMP PACKAGE ON SITE AND

READY FOR CONNECTION SHOULD CHILLER 1 FAIL TO PROVIDE ADEQUATE

CHILLED WATER TO THE DISTRIBUTION SYSTEM.

c. ISOLATE THE PIPING SERVING CH-2 TO ALLOW FOR THE DEMOLITION AND

REPLACEMENT OF THE CHILLER AND CHILLED WATER PUMP WITHOUT

DISRUPTING THE OPERATION OF THE PLANT.

d. REPLACE CHILLER CH-2 AND PUMP CHWP-2.

e. ADD CHEMICAL SHOT FEEDER TO CHILLED WATER SYSTEM.

f. REPLACE CONDENSER WATER PIPING BETWEEN CHILLER CH-2 AND

ISOLATION VALVES WITH 12-INCH DIAMETER PIPE AND NEW

APPURTENANCES AND CONTROLS.

g. PRESSURE TEST AND CLEAN ALL NEW PIPING BEFORE APPLYING

INSULATION AND BEFORE WATER IS ALLOWED TO CIRCULATE THROUGH

THE SYSTEM.

h. TEST AND BALANCE PER THE PHASE 2 SCOPE OUTLINED IN THE

SPECIFICATIONS.

i. UPDATE CONTROLS AND SEQUENCES FOR THE INTEGRATION OF THE

REPLACEMENT EQUIPMENT.

GENERAL NOTES - PHASE 2

D1

CHWP

D1

D1

V F

D V

F D

V F

D V

F D

CHWP

CH

M3.1

PHASE 2 - DEMO -

MECHANICAL

DRAWING NUMBER

DRAWING TITLE:

DRAWN BY:

GES PROJECT NO.:

DATE:

REGISTRATION:

REVISIONS:

PROJECT:

SOF

01-28-21

F20-43

SUBMISSIONS:

USDA PROJECT NO.:

ENGINEERING

PROGRAM MANAGEMENT

CONSTRUCTION MANAGEMENT

6700A ROCKLEDGE DRIVE SUITE 301

BETHESDA, MARYLAND 20817

T: 301.216.2871 (F) 301-216-9671 www.SalasObrien.com

AR EPM:

AGRICULTURAL RESEARCH SERVICES

SOUTHEAST AREA

950 College Station Road

Athens, GA 30605

UPGRADE

CHILLERS

RRC BUILDING

VE

AG-32SD-C-15-0044

1. 95% CD SUBMISSION 11/18/20

2. FINAL TURNOVER 01/28/21

0' 8'2' 4'

GRAPHIC SCALE

1/8"=1'-0"

M3.1

PHASE 2 - DEMO - MECHANICAL

XB

XC

XE

X7X6

CH

CH

CWP

CWP

CHWP

CT

CT

8"

10"

12"

12"

12"

12"

10"

8"

M V

MV

MV

M V

12" UNDERGROUND CWS

PIPE EXISTING-TO-REMAIN

12"

12"

EXISTING AIR

COMPRESSOR

A/C/ EQUIPMENT ROOM

BOILER ROOM

ELECTRICAL ROOM

OFFICE/CONTROL ROOM

GENERATOR ROOM

REFERENCE NOTES - PHASE 2 - NEW

CONNECT NEW 12-INCH DIAMETER PIPES FROM EXISTING 12-INCH

DIAMETER ISOLATION VALVE INSTALLED IN PHASE 1. INSTALL ALL NEW

PIPE ACCESSORIES IN NEW SECTION OF PIPE.

CONNECT NEW PIPING TO EXISTING.

NEW CHILLER HOUSEKEEPING PAD EXTENSION COORDINATED WITH NEW

CHILLER DIMENSIONS. REFER TO DETAILS ON M7.1 FOR HOUSEKEEPING

PAD EXTENSION REQUIREMENTS.

NEW CHILLER CH-2 SECURED TO HOUSEKEEPING PAD.

NEW PUMP ON INERTIA PAD SECURED TO NEW HOUSEKEEPING PAD.

NEW REFRIGERANT MONITORING SYSTEM (RMS) CONTROLLER INSTALLED

ON THE WALL NEXT TO THE EXISTING RMS CONTROLLER.

NEW CH-2 REFRIGERANT RELIEF DISCHARGE PIPE TERMINATED AS HIGH

ON WALL AS POSSIBLE. TERMINATE PIPE INSIDE A WALL-CAP WITH BIRD

SCREEN. PRIME AND PAINT WALL CAP TO MATCH BUILDING EXTERIOR.

REFER TO DETAIL ON M7.1 FOR MORE INFORMATION.

MAINTAIN THE SPACE BETWEEN THE CHILLERS FREE OF OBSTRUCTIONS

TO ALLOW FOR TUBE ACCESS AND CLEANING.

THE INTENT IS FOR THE FUTURE NEW CHILLER TO BE INSTALLED TO

SHARE THE ACCESS SPACE BETWEEN THE CHILLERS FOR TUBE ACCESS

AND CLEANING.

ADJUST THE VFD SPEED TO ACCOMMODATE THE NEW PUMP AND FLOW

RATE AS PART OF THE PHASE 2 TESTING AND BALANCING.

GENERAL NOTES - PHASE 2

1. IN GENERAL, THE MECHANICAL SCOPE OF PHASE 2 IS AS FOLLOWS:

a. CHILLED WATER SHALL BE PROVIDED TO THE DISTRIBUTION SYSTEM

UNINTERRUPTED THROUGHOUT CONSTRUCTION.

b. PROVIDE AN AIR-COOLED CHILLER AND PUMP PACKAGE ON SITE AND

READY FOR CONNECTION SHOULD CHILLER 1 FAIL TO PROVIDE ADEQUATE

CHILLED WATER TO THE DISTRIBUTION SYSTEM.

c. ISOLATE THE PIPING SERVING CH-2 TO ALLOW FOR THE DEMOLITION AND

REPLACEMENT OF THE CHILLER AND CHILLED WATER PUMP WITHOUT

DISRUPTING THE OPERATION OF THE PLANT.

d. REPLACE CHILLER CH-2 AND PUMP CHWP-2.

e. ADD CHEMICAL SHOT FEEDER TO CHILLED WATER SYSTEM.

f. REPLACE CONDENSER WATER PIPING BETWEEN CHILLER CH-2 AND

ISOLATION VALVES WITH 12-INCH DIAMETER PIPE AND NEW

APPURTENANCES AND CONTROLS.

g. PRESSURE TEST AND CLEAN ALL NEW PIPING BEFORE APPLYING

INSULATION AND BEFORE WATER IS ALLOWED TO CIRCULATE THROUGH

THE SYSTEM.

h. TEST AND BALANCE PER THE PHASE 2 SCOPE OUTLINED IN THE

SPECIFICATIONS.

i. UPDATE CONTROLS AND SEQUENCES FOR THE INTEGRATION OF THE

REPLACEMENT EQUIPMENT.

CHWP

V F

D V

F D

V F

D V

F D

M3.2

PHASE 2 - NEW -

MECHANICAL

DRAWING NUMBER

DRAWING TITLE:

DRAWN BY:

GES PROJECT NO.:

DATE:

REGISTRATION:

REVISIONS:

PROJECT:

SOF

01-28-21

F20-43

SUBMISSIONS:

USDA PROJECT NO.:

ENGINEERING

PROGRAM MANAGEMENT

CONSTRUCTION MANAGEMENT

6700A ROCKLEDGE DRIVE SUITE 301

BETHESDA, MARYLAND 20817

T: 301.216.2871 (F) 301-216-9671 www.SalasObrien.com

AR EPM:

AGRICULTURAL RESEARCH SERVICES

SOUTHEAST AREA

950 College Station Road

Athens, GA 30605

UPGRADE

CHILLERS

RRC BUILDING

VE

AG-32SD-C-15-0044

1. 95% CD SUBMISSION 11/18/20

2. FINAL TURNOVER 01/28/21

0' 8'2' 4'

GRAPHIC SCALE

1/8"=1'-0"

M3.2

PHASE 2 - NEW - MECHANICAL

CONTROL SYSTEM GENERAL NOTES

1. THIS PROJECT OCCURS IN AN EXISTING BUILDING WITH AN EXISTING CONTROL SYSTEM. THE NEW

SYSTEMS (CHILLER, COOLING TOWER, PUMPS, VFD'S, ETC.) ARE TO BE INCORPORATED INTO THE

EXISTING SYSTEM.

2. EXISTING CONTROL SYSTEM MANUFACTURER: AUTOMATED LOGIC

3. THE DDC SYSTEM SHALL PROVIDE FOR GLOBAL CONTROL AND MONITORING OF THE INDIVIDUAL

ITEMS OF EQUIPMENT. PROVIDE ALL MATERIALS AND EQUIPMENT AND PERFORM ALL LABOR

REQUIRED TO INSTALL A COMPLETE FUNCTIONING AND OPERABLE DDC SYSTEM.

4. THE INTENT OF THESE CONTROL SHEETS IS TO PROVIDE A GENERAL SCOPE. IT IS NOT THE INTENT

OF THESE SHEETS TO SPECIFICALLY LIST EVERY CONTROL POINT REQUIRED BY THIS PROJECT.

POINTS LISTED ONCE ON THESE SHEETS MAY BE REQUIRED MULTIPLE TIMES BY THIS PROJECT

DEPENDING ON HOW MANY PIECES OF A PARTICULAR PIECE OF EQUIPMENT IS REQUIRED FOR

THIS PROJECT.

5. THE WORK SHALL INCLUDE, BUT NOT BE LIMITED TO, THE FOLLOWING:

a. MICROPROCESSOR BASED CONTROLLERS

b. PANELS

c. ROUTERS AND COMMUNICATION

d. SWITCHES

e. WIRING AND CONDUIT

f. SENSORS, INSTRUMENTATION, WELLS, ACTUATORS, CONTROL VALVES, CONTROL DAMPERS, ETC.

g. SOFTWARE OPERATING SYSTEMS AND PROGRAMMING

h. OPERATOR SYSTEM GRAPHICS

i. COMMISSIONING, CALIBRATION, ACTIVATION, AND DE-BUGGING

j. DEMONSTRATIONS AND TRAINING

5. ALL CONTROL POINTS SHALL BE VISIBLE AND USER ADJUSTABLE THROUGH THE CONTROL SYSTEM

INTERFACE.

6. COORDINATE THE RANGE, SET POINT, DEAD-BAND, CHARACTERISTICS AND MOUNTING LOCATIONS

OF SENSORS WITH THE ACTUAL EQUIPMENT FURNISHED. INSTALL SENSORS, TUBING, AND WIRING

TO BE ACCESSIBLE AND AS NOT TO IMPEDE OR ENCROACH UPON EQUIPMENT SERVICE AND

ACCESS AREAS.

7. ALL SENSOR TUBING SHALL BE RIGID HARD-DRAWN TYPE L COPPER TUBING.

8. ALERT THE ENGINEER PRIOR TO PROCEEDING WITH WORK WHERE PROPOSED SEQUENCES

COULD DEFEAT THE EQUIPMENT MANUFACTURER'S EQUIPMENT SAFETIES, OR BE DETRIMENTAL

TO THE EQUIPMENT CONTROLLED.

9. SEQUENCES ARE PERFORMANCE-BASED AND GENERALLY DO NOT REFER TO SPECIFIC

DEAD-BANDS, RESET RATIOS, DELAYS, AND RANGES REQUIRED FOR STABLE OPERATION. THESE

PARAMETERS SHALL BE FULLY ADJUSTABLE THROUGH THE DDC SYSTEM INTERFACE.

10. PROVIDE MODIFICATION TO THE SET POINTS, DEAD-BANDS, DELAYS AND RANGES BASED UPON

THE ACTUAL PERFORMANCE OF THE CONTROLLED EQUIPMENT IN ORDER TO PROVIDE STABLE

OPERATION WITHOUT EXCESSIVE CYCLING OR HYSTERESIS. DO NOT MODIFY THE SEQUENCE

WITHOUT SUBMITTING AN ALTERNATE SEQUENCE TO THE ENGINEER FOR REVIEW AND APPROVAL.

11. DEMONSTRATE THE SEQUENCE OF OPERATION IN THE PRESENCE OF THE COMMISSIONING AGENT

FOR ALL CONTROLLED EQUIPMENT, TO INCLUDE GENERATION OF ALARMS AND SIMULATION OF

POWER OUTAGES, POWER RESTORATION, AND GENERAL EQUIPMENT FAILURES.

12. IN ADDITION TO SPECIFIC EQUIPMENT ALARMS NOTED IN THE CONTRACT DOCUMENTS, PROVIDE

STANDARD ALARMS FOR ITEMS SUCH AS SENSOR FAILURE, OUT-OF-RANGE (HIGH/LOW LIMITS)

AND SIMILAR ITEMS. REFER TO THE POINTS LIST ON M6.02 FOR MORE INFORMATION REGARDING

ALARMS.

13. COORDINATE SEQUENCES AND DATA ACQUISITION REQUIREMENTS AND PROVIDE FOR TREND

LOGGING, REPORT GENERATION, CALCULATED RUN-HOURS, AND SIMILAR PREVENTATIVE

MAINTENANCE FUNCTIONS.

14. ALL POWER,COMMUNICATION, AND CONTROL WIRES SHALL BE RUN IN GALVANIZED STEEL

CONDUIT.

15. POWER WIRING SHALL NOT BE RUN IN THE SAME CONDUIT AS LOW VOLTAGE WIRING, SIGNAL, OR

COMMUNICATIONS WIRING. FINAL CONNECTION TO SENSORS AND ACTUATORS MAY BE MADE

WITH FLEXIBLE CONDUIT NOT TO EXCEED 30 INCHES IN LENGTH.

16. WIRING SHALL BE INSTALLED IN ACCORDANCE WITH THE CURRENT VERSION OF THE NATIONAL

ELECTRIC CODE (NEC). CONDUCTORS SHALL BE COPPER, ONE-PIECE, INSTALLED WITHOUT

SPLICES.

17. POWER (120V AND ABOVE) AND CONDUIT SHALL BE PROVIDED AND TERMINATED BY THE

ELECTRICAL CONTRACTOR. TRANSFORMERS, DC POWER RECTIFIERS, AND EXTENSION OF

LOW-VOLTAGE POWER TO ACTUATORS, TRANSMITTERS, AND SIMILAR CONTROL DEVICES AND

SENSORS SHALL BE PROVIDED BY THE CONTROLS CONTRACTOR.

18. ALL CONTROL COMPONENTS, INCLUDING VALVE ACTUATORS, LOCATED OUTDOORS SHALL BE

DESIGNED FOR SUCH APPLICATION. COMPONENT ENCLOSURES SHALL ALLOW ACCESS AND BE

WEATHERPROOF WHEN CLOSED.

FAN - CENTRIFUGAL

COOLING COIL

HEATING COIL

AIR FILTER SECTION

TU

MANUALLY RE-SETTABLE TYPE

TERMINAL UNIT (VAV BOX)

PUMP

AIR FLOW MEASURING STATION

CONTROL SYSTEM LEGEND

DESCRIPTION

CONTROLS

SYMBOL DESCRIPTIONSYMBOL

EQUIPMENT

ANALOG INPUT

ANALOG OUTPUT

BI BINARY INPUT

BINARY OUTPUT

FULL BACNET COMMUNICATION

CURRENT SWITCH

DIFFERENTIAL PRESSURE SWITCH

DIFFERENTIAL PRESSURE TRANSMITTER

FREEZESTAT

SMOKE DETECTOR

STATIC PRESSURE LIMIT SWITCH

STATIC PRESSURE TRANSMITTER

MOTOR STARTER WITH RELAYS

TEMPERATURE SENSOR

VARIABLE FREQUENCY DRIVE

TRANSFORMER

MOTORIZED CONTROL VALVE ACTUATOR

VELOCITY PRESSURE SENSOR

FLOW METER

FLOW SWITCH

ABBREVIATIONS

AO

AI

BO

BC

AFMS

CS

DPS

DPT

FZ

FM

FS

SD

SPL

SPT

STR

TS

VFD

MV

VPS

XFMR

C

C

H

C

CARBON DIOXIDE SENSORCO2

ULTRAVIOLET LIGHT UV

OCCUPANCY SENSOROCC

ELECTRONICALLY COMMUTATED MOTORECM

BI-POLARIZATION BARION

RELAYRLY

SCR SILICON CONTROLLED RECTIFIER

MOTORIZED CONTROL DAMPER ACTUATORMD

OPPOSED BLADE DAMPER

PARALLEL BLADE DAMPER

E.C. ELECTRICAL CONTRACTOR

N.C. NORMALLY CLOSED

N.O. NORMALLY OPEN

EA EXHAUST AIR

F/A FIRE ALARM

OA OUTDOOR AIR

RA RETURN AIR

SA SUPPLY AIR

TU TERMINAL UNIT

UVL ULTRA-VIOLET LIGHT

VAV VARIABLE AIR VOLUME

CURRENT TRANSDUCERCT

FIRE ALARMF/A

PRESSURE SENSORPS

X

POINT DESCRIPTION - REFER TO DIRECT

DIGITAL CONTROLS (DDC) POINTS SCHEDULE

RELATIVE HUMIDITY SENSORRH

FAN - PLENUM

UV LIGHT

TS

DUCT-MOUNTED SENSOR

TS

DUCT-MOUNTED SENSOR

(AVERAGING)

DUCT ACCESS DOOR

CHILLER PLANT SEQUENCE OF OPERATIONS

RMS REFRIGERANT MONITORING SYSTEM

WATER LEVELLVL

PARTIAL CONTROL POINT SCHEDULE

CHILLER (TYP)

EVAPORATOR FLOW (GPM)

POINT

EVAPORATOR LEAVING TEMP (DEG F)

EVAPORATOR ENTERING TEMP (DEG F)

CONDENSER WATER RETURN TEMP (DEG F)

CONDENSER WATER SUPPLY TEMP (DEG F)

EVAPORATOR DIFFERENTIAL PRESSURE (PSI)

CONDENSER DIFFERENTIAL PRESSURE (PSI)

AI AO BI BO

CHWP PUMP MOTOR VFD

NOTES

SEE NOTES 2 AND 3

BASIN WATER LEVEL ALARM (1 PER STAGE)

BASIN WATER TEMP (DEG F)

SEE NOTE 1

CHILLER CONTROLLER SEE NOTE 2

CWR ISOLATION VALVE ACTUATOR POSITION

CWR TOWER BYPASS VALVE ACTUATOR POSITION

CONDENSER FLOW (GPM)

CHWP PUMP STRAINER DIFFERENTIAL PRESSURE (PSI)

RMS SYSTEM CONTROL PANEL SEE NOTE 2

SEE NOTE 1

OPEN/CLOSE - SPRING FAIL OPEN

MODULATING - SPRING FAIL CLOSED

COOLING TOWER FAN VFD SEE NOTES 2 AND 3

EVAPORATOR ENTERING PRESSURE (PSI)

EVAPORATOR LEAVING PRESSURE (PSI)

CONDENSER WATER SUPPLY PRESSURE (PSI)

CONDENSER WATER RETURN PRESSURE (PSI)

CWP PUMP MOTOR VFD SEE NOTES 2 AND 3

CWP PUMP STRAINER DIFFERENTIAL PRESSURE (PSI)

GENERAL NOTE: THIS IS NOT INTENDED TO BE A COMPLETE POINTS LIST. THERE ARE EXISTING CONTROL POINTS THAT ARE NOT

INCLUDED HERE AND ARE TO REMAIN. THE PURPOSE OF THIS POINTS LIST IS TO CLARIFY THE FUNCTION OF THE CONTROL

POINTS AFFECTED BY THIS PROJECT.

CONTROL POINT NOTES

1. USE THE BARREL DIFFERENTIAL PRESSURE TO CALCULATE THE FLOW. OBTAIN CHILLER MANUFACTURER'S DIFFERENTIAL

PRESSURE VS FLOW INFORMATION TO CREATE THE SOFTWARE CALCULATION.

2. PROVIDE BACNET COMMUNICATION TO ALLOW FOR MONITORING, CONTROL, AND ADJUSTMENT THROUGH THE THE BUILDING

MANAGEMENT DIRECT DIGITAL CONTROL SYSTEM.

3. CONTROL POINTS FOR VFD'S SHALL INCLUDE THE FOLLOWING:

· BI - HAND ON-OFF-AUTO SWITCH (ON/OFF/AUTO)

· BO - START/STOP COMMAND (ON/OFF)

· AI - STATUS (AMPS)

· BI - FAULT (ON/OFF)

· AO - SPEED COMMAND (HZ)

· AI - SPEED FEEDBACK (HZ)

SYSTEM GENERAL DESCRIPTION AND PHASING

1. THE EXISTING CHILLED WATER SYSTEM CONSISTS OF THE FOLLOWING:

a. TWO 411-TON WATER-COOLED CENTRIFUGAL CHILLERS AND TWO

COOLING TOWERS.

b. EACH CHILLER HAS A DEDICATED CHILLED WATER PUMP, A DEDICATED

CONDENSER WATER PUMP, AND A SHARED COOLING TOWER (CELLS

CAN BE MANUALLY ISOLATED).

c. THE CHILLERS ARE ALLOWED TO OPERATE ONE AT A TIME, OR

TOGETHER IN PARALLEL. THERE ARE NO MOTORIZED VALVES SO THE

PUMP CHECK VALVES KEEP THE WATER FROM FLOWING IN THE

INACTIVE SYSTEM WHEN ONLY 1 CHILLER IS OPERATING.

2. THE MODIFICATIONS TO THE SYSTEMS WILL BE COMPLETED IN 2 PHASES

AND CONTROLS WORK WILL BE REQUIRED FOR EACH PHASE. REVIEW

ENTIRE SET OF CONTRACT DOCUMENTS FOR ENTIRE REQUIRED SCOPE.

3. PHASE 1: THE RENOVATED CHILLED WATER SYSTEM CONSISTS OF THE

FOLLOWING:

a. ONE EXISTING 411-TON WATER-COOLED CENTRIFUGAL CHILLER (CH-1)

WITH EXISTING DEDICATED CHILLED WATER PUMP (CHWP-1) AND NEW

DEDICATED CONDENSER WATER PUMP (CWP-1).

b. ONE EXISTING 411-TON WATER-COOLED CENTRIFUGAL CHILLER (CH-2)

WITH EXISTING DEDICATED CHILLED WATER PUMP (CHWP-2) AND NEW

DEDICATED CONDENSER WATER PUMP (CWP-2).

c. TWO NEW COOLING TOWERS.

d. IT IS POSSIBLE TO USE EITHER COOLING TOWER WITH EITHER PUMP

VIA MANIPULATION OF MOTORIZED VALVES.

e. CHILLERS SHALL BE ALLOWED TO OPERATE SIMULTANEOUSLY.

f. ONLY ONE COOLING TOWER SHALL BE ALLOWED TO OPERATE AT A

TIME REGARDLESS OF HOW MANY CHILLERS ARE OPERATING.

3. PHASE 2: THE RENOVATED CHILLED WATER SYSTEM CONSISTS OF THE

FOLLOWING:

a. ONE EXISTING 411-TON WATER-COOLED CENTRIFUGAL CHILLER (CH-1)

WITH EXISTING DEDICATED CHILLED WATER PUMP (CHWP-1) AND NEW

DEDICATED CONDENSER WATER PUMP (CWP-1).

b. ONE NEW 900-TON WATER-COOLED CENTRIFUGAL CHILLER (CH-2)

WITH NEW DEDICATED CHILLED WATER PUMP (CHWP-2) AND NEW

DEDICATED CONDENSER WATER PUMP (CWP-2).

c. TWO NEW COOLING TOWERS.

d. IT IS POSSIBLE TO USE EITHER COOLING TOWER WITH EITHER PUMP

VIA MANIPULATION OF MOTORIZED VALVES.

e. ONLY ONE CHILLER SHALL BE ALLOWED TO OPERATE AT A TIME.

f. ONLY ONE COOLING TOWER SHALL BE ALLOWED TO OPERATE AT A

TIME.

4. THE EXISTING AUTOMATED LOGIC CONTROL SYSTEM SHALL BE EXPANDED

TO INCLUDE THE NEW COMPONENTS. THE CONTROL CONTRACTOR IS

REQUIRED TO UPDATE THE SOFTWARE, PROGRAMMING, AND GRAPHICS

AS PART OF THIS CONTRACT FOR BOTH PHASES.

SEQUENCE OF OPERATIONS

CHILLER OPERATING MODE ENABLE/DISABLE

1. THE CHILLERS SHALL BE ENABLED/DISABLED THROUGH A TIME-OF-DAY

SCHEDULE OR THROUGH A USER INPUT VIA THE DDC SYSTEM.

PHASE 1 - CHILLER OPERATING MODES

1. CHILLER OFF/STAND-BY MODE

a. CHILLER CONTROLS: DISABLED

b. CHILLED WATER PUMP VFD SPEED: 0 HZ

c. CONDENSER WATER PUMP VFD SPEED: 0 HZ

d. COOLING TOWER FAN: 0 HZ

e. COOLING TOWER ISOLATION VALVE: 0% OPEN

f. COOLING TOWER BYPASS VALVE: 100% OPEN

2. CHILLER CH-1 ON MODE

a. CH-1 CONTROLS: OPERATING

b. CHWP-1 VFD SPEED: SPEED (HZ) DETERMINED DURING TESTING AND

BALANCING TO PROVIDE 1,075 GPM.

c. CWP-1 VFD SPEED: SPEED (HZ) DETERMINED DURING TESTING AND

BALANCING TO PROVIDE 1,350 GPM.

d. CT-1 FAN VFD: OPERATING PER THE SEQUENCES

e. CT-1 ISOLATION VALVE: 100% OPEN

f. CT-1 BYPASS VALVE: OPERATING PER THE SEQUENCES

3. CHILLER CH-2 ON MODE

a. CH-2 CONTROLS: OPERATING

b. CHWP-2 VFD SPEED: SPEED (HZ) DETERMINED DURING TESTING AND

BALANCING TO PROVIDE 1,075 GPM.

c. CWP-2 VFD SPEED: SPEED (HZ) DETERMINED DURING TESTING AND

BALANCING TO PROVIDE 1,350 GPM.

d. CT-2 FAN VFD: OPERATING PER THE SEQUENCES

e. CT-2 ISOLATION VALVE: 100% OPEN

f. CT-2 BYPASS VALVE: OPERATING PER THE SEQUENCES

4. CHILLERS CH-1 AND CH-2 ON MODE

a. CH-1 AND CH-2 CONTROLS: OPERATING

b. CHWP-1 AND CHWP-2 VFD SPEED: SPEED (HZ) DETERMINED DURING

TESTING AND BALANCING TO EACH PROVIDE 1,075 GPM.

c. CWP-1 AND CWP-2 VFD SPEED: SPEED (HZ) DETERMINED DURING

TESTING AND BALANCING TO EACH PROVIDE 1,350 GPM.

d. CT-1 FAN VFD: DISABLED

e. CT-1 ISOLATION VALVE: 0% OPEN

f. CT-1 BYPASS VALVE: 100% OPEN - SEQUENCE DISABLED

g. CT-2 FAN VFD: OPERATING PER THE SEQUENCES

h. CT-2 ISOLATION VALVE: 0% OPEN

i. CT-2 BYPASS VALVE: OPERATING PER THE SEQUENCES

PHASE 2 - CHILLER OPERATING MODES

1. CHILLER OFF/STAND-BY MODE: SAME AS PHASE 1

2. CHILLER CH-1 ON MODE: SAME AS PHASE 1

3. CHILLER CH-2 ON MODE

a. CH-2 CONTROLS: OPERATING

b. CHWP-2 VFD SPEED: SPEED (HZ) DETERMINED DURING TESTING AND

BALANCING TO PROVIDE 2,150 GPM.

c. CWP-2 VFD SPEED: SPEED (HZ) DETERMINED DURING TESTING AND

BALANCING TO PROVIDE 2,700 GPM.

d. CT-2 FAN VFD: OPERATING PER THE SEQUENCES

e. CT-2 ISOLATION VALVE: 100% OPEN

f. CT-2 BYPASS VALVE: OPERATING PER THE SEQUENCES

4. CHILLERS CH-1 AND CH-2 ON MODE: SIMULTANEOUS OPERATION OF

CHILLERS IS NOT ALLOWED IN PHASE 2

PUMP START/STOP

1. THE DDC SYSTEM CONTROLLER WILL START A CHILLED WATER PUMP

THROUGH A CONTACT CLOSURE OF THE PUMP'S VARIABLE FREQUENCY

DRIVE (VFD) RUN-ENABLE CONTACTS. THE PUMP WILL OPERATE AT

CONSTANT VOLUME AT THE SPEED DETERMINED DURING THE TEST AND

BALANCE TO PROVIDE THE SCHEDULED WATER FLOW RATE.

PUMP STATUS

1. THE BAS CONTROLLER WILL DETECT PUMP RUN STATUS BY VIA THE AMP

DRAW INPUT FROM THE VFD.

PUMP FAILURE

1. IF A PUMP IS SCHEDULED TO OPERATE BUT THE VFD AMP DRAW SHOWS

THAT IT IS NOT RESPONDING, THE DDC SYSTEM CONTROLLER WILL

ANNUNCIATE A PUMP FAILURE ALARM TO THE DDC SYSTEM, SWITCH THE

ASSOCIATED CHILLER TO OFF/STAND-BY MODE, AND SWITCH THE OTHER

CHILLED WATER SYSTEM TO THE ON MODE.

COOLING TOWER FAN CONTROL

1. WHEN THE CHILLER ASSOCIATED WITH THE COOLING TOWER IS

OPERATING AND THE COOLING TOWER BASIN TEMPERATURE RISES TO 2.0

DEG. F (ADJ.) ABOVE THE SET POINT, THE COOLING TOWER FAN WILL BE

TURNED ON AT MINIMUM SPEED AND THE DDC CONTROL LOOP ENABLED.

THE FAN SPEED SHALL BE MODULATED TO MAINTAIN THE COOLING

TOWER BASIN TEMPERATURE AT SET POINT.

2. WHEN THE FAN IS OPERATING AT MINIMUM SPEED AND THE TOWER BASIN

WATER TEMPERATURE FALLS 5.0 DEG F (ADJ.) BELOW THE SET POINT, THE

TOWER FAN WILL TURN OFF.

COOLING TOWER FAN FAILURE

1. IF A FAN IS SCHEDULED TO OPERATE BUT THE VFD AMP DRAW SHOWS

THAT IT IS NOT RESPONDING, THE DDC SYSTEM CONTROLLER WILL

ANNUNCIATE A FAN FAILURE ALARM TO THE DDC SYSTEM, SWITCH THE

ASSOCIATED CHILLER TO OFF/STAND-BY MODE, AND SWITCH THE OTHER

CHILLED WATER SYSTEM TO THE ON MODE.

COOLING TOWER BYPASS CONTROL

1. WHEN THE ACTIVE SYSTEM'S COOLING TOWER FAN IS OFF AND THE

TOWER BASIN WATER TEMPERATURE FALLS 8.0 DEG F (ADJ.) BELOW THE

SET POINT, THE BYPASS VALVE SHALL START TO OPEN. THE COOLING

TOWER FAN SHALL NOT BE ALLOWED TO OPERATE WHEN THE TOWER IS

IN BY-PASS MODE.

2. THE BYPASS VALVE SHALL MODULATE TO MAINTAIN THE BASIN

TEMPERATURE AT SET POINT.

3. WHEN THE SET POINT IS SATISFIED AND THE BY-PASS CONTROL VALVE

HAS MODULATED CLOSED, THE COOLING TOWER SHALL EXIT THE BYPASS

CONTROL SEQUENCE AND RETURN TO NORMAL OPERATING SEQUENCES.

COOLING TOWER BASIN HEATER CONTROL

1. WHEN THE BASIN WATER TEMPERATURE FALLS BELOW 60 DEG F (ADJ),

THE BASIN HEATER SHALL BE ENABLED TO MAINTAIN THE TEMPERATURE

AT THE SET POINT.

COOLING TOWER LOW LEVEL ALARM

1. COOLING TOWER SUMP LEVEL SENSOR WILL PROVIDE A LOW WATER

LEVEL ALARM TO THE DDC SYSTEM.

M5.1

CONTROLS -

MECHANICAL

DRAWING NUMBER

DRAWING TITLE:

DRAWN BY:

GES PROJECT NO.:

DATE:

REGISTRATION:

REVISIONS:

PROJECT:

SOF

01-28-21

F20-43

SUBMISSIONS:

USDA PROJECT NO.:

ENGINEERING

PROGRAM MANAGEMENT

CONSTRUCTION MANAGEMENT

6700A ROCKLEDGE DRIVE SUITE 301

BETHESDA, MARYLAND 20817

T: 301.216.2871 (F) 301-216-9671 www.SalasObrien.com

AR EPM:

AGRICULTURAL RESEARCH SERVICES

SOUTHEAST AREA

950 College Station Road

Athens, GA 30605

UPGRADE

CHILLERS

RRC BUILDING

VE

AG-32SD-C-15-0044

1. 95% CD SUBMISSION 11/18/20

2. FINAL TURNOVER 01/28/21

M5.2

CHILLED WATER PLANT CONTROL SCHEMATIC - PHASE 1B - DEMO

NOT TO SCALE

CH

CONDENSER

EVAPORATOR

CHILLER

CONTROLLER

PS

PS

TS

DPT

DPT

TS

CH

CONDENSER

EVAPORATOR

CHILLER

CONTROLLER

PS

PS

TS

DPT

DPT

TS

PS

PS

PS

PS

CWP

CWP

CHWP

CHWP

8"

8"

8"

12"

8"

8"

10"

10"

CT

CT

CELL 1

CELL 2

10"

8"

X"

D1

D1

8" 8"

8" 8"

10"

M5.2

CHILLED WATER PLANT CONTROL SCHEMATIC - PHASE 1B - NEW

NOT TO SCALE

CH

CONDENSER

EVAPORATOR

CHILLER

CONTROLLER

CONDENSER

EVAPORATOR

CHILLER

CONTROLLER

PS

PS

CWP

12"

10"

10"

CT

CT

12"

8"

8" 8"

8"

8"

8"

12"

D1

D1

D1

MV

12"

12"12"

8" 8"

D1

12"

10"

12"

12"

12"

411 TONS 411 TONS

411 TONS

M5.2

PHASE 1A - LINE-STOP INSTALLATION

NOT TO SCALE

10"

10"

D6 D6

D6 D6

LINE-STOP WITH BYPASS (TYP 2)

SEE PHASE 1 FOR WORK IN THIS AREA

SEE PHASE 1B DEMO FOR GENERAL LOCATION OF WORK IN THIS AREA

PHASE 1A: INSTALL LINE-STOP WITH BYPASS TO MINIMIZE PLANT DOWNTIME.

REFERENCE NOTES - NEW REFERENCE NOTES - DEMO

D11

CONNECT NEW PIPING TO EXISTING.

ROUTE TEMPORARY PIPING TO TEMPORARY AIR-COOLED

CHILLER LOCATED OUTSIDE.

CLOSE VALVE TO ISOLATE THE CHILLER PLANT FROM THE

DISTRIBUTION LOOP AND USE THE TEMPORARY CHILLER TO

PROVIDE THE BUILDING'S CHILLED WATER.

REMOVE OPERATOR LEAVING THE LINE STOP VALVE IN THE

100% OPEN POSITION.

NEW COOLING TOWER.

NEW CONDENSER WATER PUMP AND ACCESSORIES.

NEW VFD FOR CHILLED WATER PUMP. THE EXISTING STARTERS

ARE BEING DEMOLISHED AS PART OF THE PHASE 1 ELECTRICAL

WORK. NEW VFD SHALL BE SIZED FOR FUTURE PUMP

INSTALLATION BUT BALANCED TO OPERATE AT CONSTANT

SPEED TO PROVIDE THE REQUIRED CHILLED WATER FLOW FOR

THE EXISTING CHILLER SERVED. THE VFD WILL BE REBALANCED

WHEN THE NEW PUMPS ARE INSTALLED IN THE FUTURE. THE DIV

23 CONTRACTOR SHALL PROVIDE AND MOUNT THE VFD, THE DIV

26 CONTRACTOR SHALL COMPLETE THE INSTALLATION.

DISCONNECT PIPING AND PREPARE FOR CONNECTION TO NEW.

DEMOLISH COOLING TOWER AND PIPING AS INDICATED.

DEMOLISH PUMP, PIPING, AND APPURTENANCES AS INDICATED.

ROUTE TEMPORARY PIPING TO TEMPORARY AIR-COOLED

CHILLER LOCATED OUTSIDE.

CLOSE VALVE TO ISOLATE THE CHILLER PLANT FROM THE

DISTRIBUTION LOOP AND USE THE TEMPORARY CHILLER TO

PROVIDE THE BUILDING'S CHILLED WATER.

INSTALL LINE-STOP WITH BYPASS IN THE 10-INCH DIAMETER

CHWS AND CHWR PIPES.

TO TEMP

CHILLER

TO TEMP

CHILLER

D2

D3

D3

D3

COOLING TOWER

EQUALIZER PIPING

CWP

12"

12"

GENERAL NOTES

1. COORDINATION WITH THE EXISTING CHEMICAL TREATMENT VENDOR

IS REQUIRED AS PART OF THIS PROJECT.

· THE CONTRACTOR SHALL PROVIDE ALL NEW PIPE CONNECTIONS

REQUIRED BY THE CHEMICAL TREATMENT VENDOR TO ALLOW

FOR CHEMICAL INJECTION AND MONITORING.

· THE CHEMICAL TREATMENT VENDOR SHALL ADJUST THE

CONDENSER WATER TREATMENT TO ACCOMMODATE THE

LARGER COOLING TOWERS.

COOLING TOWER DRAIN

COOLING BYPASS

MV

COOLING OVERFLOW

12"

MV

MV

COOLING OVERFLOW

12"

COOLING BYPASS

12"

DPT

TS

TS

TS LVL TS LVL

TS

LVL

TS

LVL

VFD

VFD

VFD

VFD

DPT

DPT

12"

12"

RMS

14 15

14 15

14 15

14 15

22 21

22 21

PS

PS

TS

DPT

DPT

TS

PS

PS

TS

DPT

DPT

TS

CHWP

CHWP

8"

8"

8"

8"

8"

CH

411 TONS

8"

8"

13 13

D5

D5

D4

D4

10"

10"

D4

D5

D1

D1

D2

D2

D6

D1

NEW LUG STYLE BUTTERFLY VALVE

WITH BLIND FLANGE FOR FUTURE

NEW CHILLER CH-1 CONNECTION

D1

D1

D1

D1

D1

D1

10"10"

RMS

VFD19

VFD19

M5.2

CONTROLS -

MECHANICAL

DRAWING NUMBER

DRAWING TITLE:

DRAWN BY:

GES PROJECT NO.:

DATE:

REGISTRATION:

REVISIONS:

PROJECT:

SOF

01-28-21

F20-43

SUBMISSIONS:

USDA PROJECT NO.:

ENGINEERING

PROGRAM MANAGEMENT

CONSTRUCTION MANAGEMENT

6700A ROCKLEDGE DRIVE SUITE 301

BETHESDA, MARYLAND 20817

T: 301.216.2871 (F) 301-216-9671 www.SalasObrien.com

AR EPM:

AGRICULTURAL RESEARCH SERVICES

SOUTHEAST AREA

950 College Station Road

Athens, GA 30605

UPGRADE

CHILLERS

RRC BUILDING

VE

AG-32SD-C-15-0044

M5.3

CHILLED WATER PLANT CONTROL SCHEMATIC - PHASE 2 - DEMO

NOT TO SCALE

CH

CONDENSER

EVAPORATOR

CHILLER

CONTROLLER

PS

PS

TS

DPT

DPT

TS

PS

PS

TS

DPT

DPT

TS

PS

PS

8"

8"

8"

10"

10"

8"

CH

CONDENSER

EVAPORATOR

CHILLER

CONTROLLER

TS

10"

10"

8"

8"

D1

12"

TS

900 TONS

REFERENCE NOTES - NEW REFERENCE NOTES - DEMO

D11

CONNECT NEW PIPING TO EXISTING.

NEW CHILLER.

NEW CHILLED WATER PUMP AND ACCESSORIES.

DISCONNECT PIPING AND PREPARE FOR CONNECTION TO NEW.

DEMOLISH CHILLER AND PIPING AS INDICATED.

DEMOLISH PUMP, PIPING, AND APPURTENANCES AS INDICATED.

CLOSE VALVE TO ISOLATE CH-2 FROM THE DISTRIBUTION LOOP

AND USE CH-1 TO PROVIDE THE BUILDING'S CHILLED WATER.

PROVIDE TEMPORARY AIR-COOLED CHILLER TIED INTO THE

DISTRIBUTION SYSTEM IF WORK IS PERFORMED IN THE WARMER

MONTHS WHEN CH-1 CANNOT HANDLE THE LOAD.

D2

D3

D3

D4

CHWP

3/4"

NEW CHEMICAL SHOT FEEDER

GENERAL NOTES

1. COORDINATION WITH THE EXISTING CHEMICAL TREATMENT VENDOR

IS REQUIRED AS PART OF THIS PROJECT.

· THE CONTRACTOR SHALL PROVIDE ALL NEW PIPE CONNECTIONS

REQUIRED BY THE CHEMICAL TREATMENT VENDOR TO ALLOW

FOR CHEMICAL INJECTION AND MONITORING.

· THE CHEMICAL TREATMENT VENDOR SHALL PROVIDE CHEMICAL

PELLETS FOR THE CHILLED WATER SHOT FEEDER.

2. THE REQUIREMENT FOR A TEMPORARY AIR-COOLED CHILLER FOR

PHASE 2 WORK IS DEPENDANT ON THE TIME OF YEAR THE WORK IS

PERFORMED. IF THE WORK IS TO BE PERFORMED DURING MONTHS

WHERE THE PLANT DEMAND HAS BEEN HISTORICALLY GREATER

THAN THE CAPACITY OF CHILLER CH-1, THE CONTRACTOR SHALL

PROVIDE AN AIR-COOLED CHILLER AND PUMP PACKAGE TIED INTO

THE EMERGENCY CHILLED WATER CONNECTIONS. THE TEMPORARY

CHILLER SHALL OPERATE IN PARALLEL WITH CHILLER CH-1.

DPT

VFD DPT

12"

DPT

TS

TS

8"

8"

CONDENSER

EVAPORATOR

CHILLER

CONTROLLER

CWP

12"

CT

CT

12"

8" 8"

MV

12"

8" 8"

12"

12"

COOLING TOWER

EQUALIZER PIPING

CWP

12"

12"

COOLING TOWER DRAIN

COOLING BYPASS

MV

COOLING OVERFLOW

12"

MV

MV

COOLING OVERFLOW

12"

COOLING BYPASS

12"

TS

LVL

TS

LVL

VFD

VFD

VFD

VFD

DPT

DPT

12"

12"

14 15

14 15

22 21

22 21

CH

12"

D1

M5.3

CHILLED WATER PLANT CONTROL SCHEMATIC - PHASE 2 - DEMO

NOT TO SCALE

CH

CONDENSER

EVAPORATOR

CHILLER

CONTROLLER

PS

PS

TS

DPT

DPT

TS

PS

PS

8"

10"

10"

12"

RMS

12"

CWP

12"

CT

CT

12"

8" 8"

MV

12"

8" 8"

12"

12"

COOLING TOWER

EQUALIZER PIPING

CWP

12"

12"

COOLING TOWER DRAIN

COOLING BYPASS

MV

COOLING OVERFLOW

12"

MV

MV

COOLING OVERFLOW

12"

COOLING BYPASS

12"

TS

LVL

TS

LVL

VFD

VFD

VFD

VFD

DPT

DPT

12"

12"

14 15

14 15

22 21

22 21

12"

RMS

8"

8"

8"

DPT8

TS

TS

12"

12"

3/4"

411 TONS

411 TONS411 TONS

D2

D1

D11

CHWP

8"

10"

10"

10" 10"

RMS

D4

D4

10" EMERGENCY CHILLED

WATER SUPPLY CONNECTION

10" EMERGENCY CHILLED

WATER RETURN CONNECTION

10" EMERGENCY CHILLED

WATER SUPPLY CONNECTION

10" EMERGENCY CHILLED

WATER RETURN CONNECTION

VFD19

CHWP

CHWP

VFD19

VFD19

M5.3

CONTROLS -

MECHANICAL

DRAWING NUMBER

DRAWING TITLE:

DRAWN BY:

GES PROJECT NO.:

DATE:

REGISTRATION:

REVISIONS:

PROJECT:

SOF

01-28-21

F20-43

SUBMISSIONS:

USDA PROJECT NO.:

ENGINEERING

PROGRAM MANAGEMENT

CONSTRUCTION MANAGEMENT

6700A ROCKLEDGE DRIVE SUITE 301

BETHESDA, MARYLAND 20817

T: 301.216.2871 (F) 301-216-9671 www.SalasObrien.com

AR EPM:

AGRICULTURAL RESEARCH SERVICES

SOUTHEAST AREA

950 College Station Road

Athens, GA 30605

UPGRADE

CHILLERS

RRC BUILDING

VE

AG-32SD-C-15-0044

MANUFACTURER

ENTERING WATER TEMP (DEG F)

WATER FLOW (GPM)

NOMINAL CAPACITY (TONS)

MANUFACTURER

COOLING TOWERS

ELECTRICAL DATA

MOCP

MCA

OUTLET SUCTION CONNECTION SIZE (IN)

INLET CONNECTION SIZE (IN)

OPERATING WEIGHT (LBS)

UNIT REQUIREMENTS

WATER-COOLED CHILLERS

NOTES

ACCESSORIES

MARK

NOTES

VOLTS/PHASE/HZ

EVAPORATOR

FULL LOAD KW/TON

MARK

MODEL

LOCATION

TYPE

CT-1

1. SIDE CWR OUTLET CONNECTION

2. TOP DUAL CWR INLET CONNECTION WITH BALANCING VALVES

3. BOTTOM EQUALIZER PIPE AND OVERFLOW PIPE CONNECTIONS

4. 304 STAINLESS STEEL BASIN

5. VIBRATION CUT OUT SWITCH

6. TEFC VARIABLE SPEED FAN MOTOR, INVERTER DUTY RATED PER NEMA MG-1

7. FAN MOTOR SHAFT GROUNDING RINGS

8. FAN MOTOR SPACE HEATERS

9. EXTENDED LUBRICATION LINES

10. DRIFT ELIMINATORS

11. AUTOMATIC WATER LEVEL MEASUREMENT AND CONTROL

12. IBC STANDARD STRUCTURAL DESIGN WITH 1.0 IMPORTANCE FACTOR

13. LADDER W/SAFETY CAGE, SAFETY RAILS AROUND TOP PLATFORM, EXTERIOR

ACCESS DOOR PLATFORM, AND INTERNAL WALKWAY AND PLATFORM FOR FAN

MOTOR ACCESS

14. FACTORY-MOUNTED COOLING TOWER CONTROL ENCLOSURE (NEMA 4X) WITH

SINGLE-POINT 460V CONNECTION AND UNIT-MOUNTED DISCONNECT AND VFD

WITH H-O-A SWITCH. PANEL SHALL PROVIDE POWER FOR ALL SERVICES

REQUIRED BY THE COOLING TOWER INCLUDING, BUT NOT LIMITED TO, THE

FOLLOWING:

· 460V FOR FAN MOTOR VFD WITH INTEGRAL BYPASS

· 460V FOR BASIN HEATERS

· 120V FOR CONTROLS, COOLING FAN, PANEL HEATER, AND MOTOR HEATER

· 24V FOR CONTROLS

1. RIG UNITS INTO PLACE IN STRICT ACCORDANCE WITH THE MANUFACTURER'S

RIGGING INSTRUCTIONS.

2. SET UNIT DEAD LEVEL IN BOTH DIRECTIONS.

3. SUPPORT PIPE SO NO WEIGHT RESTS ON COOLING TOWERS.

4. THOROUGHLY CLEAN UNIT BEFORE FILLING TOWERS.

5. BALANCE THE WATER FLOW BETWEEN THE CELLS.

6. GREASE OR OIL ALL BEARINGS IN ACCORDANCE WITH THE MANUFACTURER'S

RECOMMENDATIONS.

7. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLING ALL COMPONENTS

SHIPPED LOOSE WITH THE COOLING TOWER.

8. COOLING TOWER CONTROLS SHALL BE INTEGRATED INTO THE EXISTING

BUILDING DDC CONTROLS - AUTOMATED LOGIC CONTROLS.

NOTES

1. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLING ALL COMPONENTS

SHIPPED LOOSE WITH THE CHILLER.

2. THE REPLACEMENT OF CHILLER CH-1 IS NOT IN THE SCOPE OF THIS

PROJECT.

CH-2

ACCESSORIES (PROVIDE THE FOLLOWING)

MARK

SERIES

WATER FLOW RATE (GPM)

MANUFACTURER

MOTOR RPM

MOTOR HP

PUMP

PUMPS

CHWP-1

IMPELLER SIZE (IN)

1,000

NOTES

LOCATION

MECH ROOM

TYPE

TOTAL HEAD (FT-H2O)

VOLTS/PHASE/HZ 460/3/60

END-SUCTION

ACCESSORIES

GENERAL

3,4

OPERATING WEIGHT (LBS)

NOTES

ACCESSORIES…