0003 A - 658-24-102 B2 AHUs - New Drawing Addendum 1 - Glycol system.pdf

ROANOKE

BOONES MILL

BEDFORD

TROUTVILLE

CHRISTIANSBURG

ROUTE 42

ROUTE 81

ROUTE 460

ROUTE 221

ROUTE 220

ROUTE 460

P A

TR

IO

TS

B

LV

D

PATRIO

TS C

IR

P A T R

IO

T S C

IR

ROANOKE BLVD

G A R

D E N

S Q

ROANOKE B

LVD

BUILDING

CONTRACT OFFICER REPRESENTATIVE DATE

CHIEF OF ENGINEERING DATE

INTERIOR DESIGNER DATE

DEPARTMENT HEAD DATE

CONTRACTING OFFICER DATE LEAD USER SIGNATURE DATE

Project Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

Office of Construction and Facilities Management

U.S. Department of Veterans Affairs

B

C

D

E

F

A

B

C

D

E

F

21 4 5 6 7 8 9 10

Phase

ARCHITECT/ENGINEER OF RECORD

A/E:

STAMPCONSULTANT

321 4 5 6 7 8 9 10

Consultant:

NOT F

OR

CONSTRUCTIO

N

A u to d e s k D o c s

/2

.1

V A

S a le m

A H

U R e p la c e m e n t-

C h a rl o tt e

E n g in e e rs

/2 -0

A v

.r v t

/5

/2

:0

:2

P M

GI000

COVER SHEET

CHARLOTTE ENGINEERS, LLP

5838 MONROE ROAD

CHARLOTTE, NC 28212

GUIDON

1221 N. PENNSYLVANIA STREET

INDIANAPOLIS, IN 46202

REPLACE BUILDING 2 AIR

HANDLERS

1970 ROANOKE BLVD, SALEM VA 24153

658-24-102

12/03/2025 AO LS

658-24-102

REPLACE BUILDING 2 AIR HANDLERS

SALEM VA MEDICAL CENTER

1970 ROANOKE BLVD, SALEM VA 24153

BID DOCUMENTS

BID DOCUMENTS

FULLY SPRINKLERED

SHEET INDEX

SHEET NUMBER SHEET NAME

GI000 COVER SHEET

GC101 BASEMENT FLOOR PHASING PLAN

GC102 FIRST FLOOR PHASING PLAN

GI101 BASEMENT FLOOR LIFE SAFETY

GI102 FIRST FLOOR LIFE SAFETY

AD111 BASEMENT REFLECTED CEILING DEMOLITION PLAN

AD112 BASEMENT REFLECTED CEILING DEMOLITION PLAN

AD113 FIRST FLOOR REFLECTED CEILING DEMOLITION PLAN

AE001 ARCHITECTURAL SYMBOLS AND ABBREVIATIONS

AE111 BASEMENT FLOOR REFLECTED CEILING PLAN

AE112 BASEMENT FLOOR REFLECTED CEILING PLAN

AE113 FIRST FLOOR REFLECTED CEILING PLAN

FA001 FIRE ALARM - SYMBOLS, NOTES, AND DRAWING INDEX

FA002 FIRE ALARM - INPUT/OUTPUT MATRIX & MISCEL. REQUMTS

FA003 FIRE ALARM - DETAILS

FA100 FIRE ALARM - NEW WORK - BASEMENT - AREA A

FA101 FIRE ALARM - NEW WORK - BASEMENT - AREA B

FA200 FIRE ALARM - NEW WORK - FIRST FLOOR

FX001 FIRE SUPPRESSION - SYMBOLS, NOTES, AND DRAWING INDEX

FX002 FIRE SUPPRESSION - IMPAIR., REQMTS, & FLOW TEST

FX003 FIRE SUPPRESSION - DETAILS

FX100 FIRE SUPPRESSION - DEMOLITION - BASEMENT - AREA A

FX101 FIRE SUPPRESSION - DEMOLITION - BASEMENT - AREA B

FX102 FIRE SUPPRESSION - NEW WORK - BASEMENT - AREA A

FX103 FIRE SUPPRESSION - NEW WORK - BASEMENT - AREA B

FX104 FIRE SUPPRESSION - DESIGN CRITERIA - BASEMENT - AREA A

FX105 FIRE SUPPRESSION - DESIGN CRITERIA - BASEMENT - AREA B

FX200 FIRE SUPPRESSION - DEMOLITION - FIRST FLOOR

FX201 FIRE SUPPRESSION - NEW WORK - FIRST FLOOR

FX202 FIRE SUPPRESSION - DESIGN CRITERIA - FIRST FLOOR

PP100 PLUMBING - DEMOLITION AND NEW WORK - BASEMENT - AREA A

PP101 PLUMBING - DEMOLITION AND NEW WORK - BASEMENT - AREA B

PP102 PLUMBING - DEMOLITION AND NEW WORK - FIRST FLOOR

M001 MECHANICAL - SYMBOLS, NOTES, AND DRAWING INDEX

M002 MECHANICAL - DETAILS

M003 MECHANICAL - SCHEDULES

M004 MECHANICAL - AHU SCHEDULES

M005 MECHANICAL - 2-AHU-9 SEQUENCE OF OPERATIONS

M006 MECHANICAL - 2-AHU-10 SEQUENCE OF OPERATIONS

M007 MECHANICAL - TERMINAL UNIT & EXHAUST FAN SEQUENCE OF

OPERATIONS

M008 MECHANICAL - GLYCOL ENERGY RECOVERY SCHEMATIC

MH101A MECHANICAL - PHASE 1A - BASEMENT - AREA A

MD101B MECHANICAL - PHASE 1B DEMOLITION - BASEMENT - DUCTWORK - AREA A

MD102B MECHANICAL - PHASE 1B DEMOLITION - BASEMENT - PIPING - AREA A

MH101C MECHANICAL - PHASE 1C NEW WORK - BASEMENT - DUCTWORK - AREA A

MP101C MECHANICAL - PHASE 1C NEW WORK - BASEMENT - PIPING - AREA A

MH201A MECHANICAL - PHASE 2A - AREA B

MD201B MECHANICAL - PHASE 2B DEMOLITION - BASEMENT - DUCTWORK - AREA B

MD202B MECHANICAL - PHASE 2B DEMOLITION - BASEMENT - PIPING - AREA B

MD211B MECHANICAL - PHASE 2B DEMOLITION - FIRST FLOOR - DUCTWORK

MD212B MECHANICAL - PHASE 2B DEMOLITION - FIRST FLOOR - PIPING

MH201C MECHANICAL - PHASE 2C NEW WORK - BASEMENT - DUCTWORK - AREA B

MH211C MECHANICAL - PHASE 2C NEW WORK - FIRST FLOOR - DUCTWORK

MP202C MECHANICAL - PHASE 2C NEW WORK - BASEMENT - PIPING - AREA B

MP212C MECHANICAL - PHASE 2C NEW WORK - FIRST FLOOR - PIPING

MD201D MECHANICAL - PHASE 2D DEMOLITION - AREA B

E001 ELECTRICAL - SYMBOLS, NOTES, AND DRAWING INDEX

E002 ELECTRICAL - DETAILS

E003 ELECTRICAL - POWER RISER DIAGRAM AND SCHEDULES

E004 ELECTRICAL - BASEMENT - PHASING PLAN

E005 ELECTRICAL - FIRST FLOOR - PHASING PLAN

ED100A ELECTRICAL - DEMOLITION - BASEMENT - AREA A

ED100B ELECTRICAL - DEMOLITION - BASEMENT - AREA B

ED200 ELECTRICAL - DEMOLITION - FIRST FLOOR

EL100A ELECTRICAL - NEW WORK - BASEMENT - LIGHTING - AREA A

EL100B ELECTRICAL - NEW WORK - BASEMENT - LIGHTING - AREA B

EL200 ELECTRICAL - NEW WORK - FIRST FLOOR - LIGHTING

EP100A ELECTRICAL - NEW WORK - BASEMENT - POWER - AREA A

EP100B ELECTRICAL - NEW WORK - BASEMENT - POWER - AREA B

EP100C ELECTRICAL - NEW WORK - BASEMENT - POWER - ENLARGED VIEWS

EP200 ELECTRICAL - NEW WORK - FIRST FLOOR - POWER

Contact:Contact: Contact:

CHARLOTTE ENGINEERS

Name: AVERY STANLEY

MECHANICAL ENGINEER

MECHANICAL,

ELECTRICAL &

PLUMBING

SALEM VA MEDICAL CENTER

TODD CARROLL

HEALTHCARE ENGINEER

1970 Roanoke Blvd. , Salem, VA 24153 p: 540. 982. 2463 X 2546 e: todd.carroll2@va.gov

OWNER

GUIDON DESIGN INC.

Name: ADAM ORGZEWALLA

PROJECT ARCHITECT

1221 North Pennsylvania Street Indianapolis, IN 46202 p: 317.800.6388 x 103 e: aogrzewalla@guidon.com

ARCHITECT

Contact:

CHARLOTTE ENGINEERS

Name: AVERY STANLEY

PROJECT MANAGER

5838 Monroe Road Charlotte, NC 28212 p: 704.531.3000 x 106 e: acallahan@charlotteengineers.com

PROJECT MANAGER

AREA MAP

CAMPUS MAP

N

N

5838 Monroe Road Charlotte, NC 28212 p: 704.531.3000 x 106 e: acallahan@charlotteengineers.com

Revisions: Date:

ADDENDUM 1 08/04/2026

lbaharozian Image

,8 ,9 ,1 h w r e h e a t

DIRECT EXPANSIONDX

TEMPERATURE SENSOR

UNDERWRITER'S LABORATORIES

UNLESS OTHERWISE NOTED

SYMBOL OR SYMMETRICAL

TEST, ADJUST, BALANCE

TRANSFER DUCT

SUPPLY REGISTER

STANDARD CUBIC FEET PER MINUTE

SHEET METAL AND AIR CONDITIONING

CONTRACTORS NATIONAL ASSOCIATION

STATIC PRESSURE

VENT THRU ROOF

VARIABLE SPEED

YARD CLEAN OUT

WEATHER PROOF

VARIABLE FREQUENCY DRIVE

VARIABLE VOLUME

WET BULB TEMPERATUREWb

GP

INSUL

INV

LAT

LB/HR

KW

HTG

HVAC

HOA

HORZ

H'STAT

HR

HP

HD

GPH

GPM

HC

IB

IN

ID

HEATING, VENTILATING, AND AIR CONDITIONING

INVERTED BUCKET

INSIDE DIAMETER

LEAVING AIR TEMPERATURE

POUNDS PER HOUR

INSULATED

INVERT

KILOWATT

HEATING

INCH

HEAT DETECTOR

HAND-OFF-AUTOMATIC

HORSEPOWER

GALLONS PER HOUR

GALLONS PER MINUTE

HUMIDITY CONTROLLER

HORIZONTAL

HUMIDISTAT

HOUR

GUIDE POINT

YCO

WP

WG WATER GAGE

FCV

GALV

GC

GAL

FSD

FT

FV

FS

FPC

FPM

FPS

FOB

FP

FO

FLEX

FLG

FLR-FLR

FD

FACP

F&T

F.D.

FC

EQUIP

ESP

EWT

EXH

ER

EC

EFF

ELEC

EL

EQ

EAT

EA

F

EJ

FIRE PROTECTION CONTRACTOR

FEET PER SECOND

FLOW SWITCH/SENSOR

GENERAL CONTRACTOR

COMBINATION FIRE/SMOKE DAMPER

FEET PER MINUTE

FEET

GALVANIZED

GALLON(S)

FLOW VALVE

FLOW CONTROL VALVE

FLOOR TO FLOOR HEIGHT

FIRE PROTECTI0N

FLAT ON BOTTOM

FLANGE

FLAT OVAL

FIRE DAMPER

FLEX

VERT

W/

W/O

VFD

VTR

VOL

VS

VP

VLV

WITHOUT

WITH

VERTICAL

VOLUME

VENT POINT

VALVE

THRU

T'STAT

UL

V

UON

TYP

TOP

TS

TOS

TOD

THERMOSTAT

TYPICAL

THROUGH

TOP OF DUCT

TOP OF STEEL

TOP OF PIPE

EXHAUST REGISTER

EXTERNAL STATIC PRESSURE

ENTERING WATER TEMPERATURE

FIRE ALARM CONTROL PANEL

FLOAT AND THERMOSTATIC

FLOW CONTROLLER

FAHRENHEIT

FLOOR DRAIN

EXHAUST

ENTERING AIR TEMPERATURE

ELECTRICAL CONTRACTOR

EXPANSION JOINT

ELEVATION

ELECTRICAL

EQUAL

EQUIPMENT

EXHAUST AIR

EFFICIENCY

SPRINKLERSPR

STRUCT

TAB

T/D

SYM

SYS

STL

STM

SR

SQ

STRUCTURAL

SYSTEM

STEEL

STEAM

SQUARE

SMACNA

SPEC

SECT

SCFM

SP

SCH

SD

SA

SECTION

SPECIFICATION

SMOKE DAMPER

SCHEDULE

SUPPLY AIR

LOW SIDE WALL EXHAUST REGISTER

LEAVING WATER TEMPERATURE

RELATIVE HUMIDITY

REVOLUTIONS PER MINUTE

POUNDS PER SQUARE INCH ABSOLUTE

POUNDS PER SQUARE INCH GAGE

REFLECTED CEILING PLAN

POLYVINYL CHLORIDE

PRESSURE REDUCING VALVE

POUNDS PER SQUARE INCH

PRESSURE REDUCING STATION

PLUMBING CONTRACTOR

OUTSIDE DIAMETER

MOTOR OPERATED DAMPER

NATIONAL ELECTRIC CODE

NATIONAL ELECTRICAL MANUFACTURER'S

NATIONAL FIRE PROTECTION ASSOCIATION

NET POSITIVE SUCTION HEAD

NOT IN CONTRACT

NORMALLY OPEN

NORMALLY CLOSED

MECHANICAL CONTRACTOR

MANUAL AIR VENT

MANUAL DAMPER

MANUFACTURERMFR

ARCH ARCHITECTURAL

DWG

DWV

Db

DEG(°)

DPR

DTF

DP

DN

CU.FT.

CTR

CU.YD.

DD

CU

CONN

CONT

CONTR

COP

CONST

COORD

CFH

CFM

CLG

CONC

CO

ASHRAE

BFP

BDD

ASME

BHP

AUTO

BOP

BOD

BTUH

BTU

BOS

BV

C

CUBIC YARD

DRAIN, WASTE, AND VENT

DOWN THRU FLOOR

DUCT MOUNTED SMOKE DETECTOR

DRAIN POINT

DRAWING

DAMPER

DRY BULB TEMPERATURE

DEGREE(S)

DOWN

COEFFICIENT OF PERFORMANCE

CONSTRUCTION

COPPER

CUBIC FEET

CENTER

CONNECTION

CONTINUATION

CONTRACTOR

COORDINATE

RECIRC

REINF

REQD

RH

RPM

RM

REV

RD

RA

RCP

REQUIRED

ROOM

REVISION

RETURN AIR

RECIRCULATING

REINFORCING

ROUND

PLBG

PSIG

QTY

PVC

PSI

PSIA

PRV

PRS

PL

QUANTITY

PILOT LIGHT

PLUMBING

AMERICAN SOCIETY OF MECHANICAL ENGINEERS

CONSTANT VOLUME

CUBIC FEET PER HOUR

CUBIC FEET PER MINUTE

BRITISH THERMAL UNIT PER HOUR

BRITISH THERMAL UNIT

BOTTOM OF STEEL

BUTTERFLY VALVE

CEILING

CLEAN OUT

CONCRETE

BACKFLOW PREVENTER

BOTTOM OF PIPE

BOTTOM OF DUCT

BACKDRAFT DAMPER

AND AIR CONDITIONING ENGINEERS

BOILER HORSEPOWER OR BRAKE HORSEPOWER

AUTOMATIC

NIC

OPNG

NPSH

OA

P.C.

OD

OC

NTS

NO.

NO

OUTSIDE AIR

ON CENTER

OPENING

NOT TO SCALE

NUMBER

NFPA

NEMA

NC

NEC

MOD

MTD

MIN

MH

ASSOCIATION

MOUNTED

MINIMUM

MANHOLE

AD

AFMS

ALUM

AFF

AC/HR

AP

ANSI

APPROX

AMCA

ABV.CLG.

AIR MOVEMENT AND CONTROL ASSOCIATION

AMERICAN NATIONAL STANTDARDS INSTITUTE

ANCHOR POINT

AIR FLOW MONITORING STATION

ACCESS DOOR

ABOVE FINISHED FLOOR

AIR CHANGES PER HOUR

ALUMINUM

APPROXIMATE

ABOVE CEILING

POUNDS OR NUMBER

ROUND, DIAMETER OR PHASE

LSWER

MEZZ

MECH

MFG

MD

MAX

MC

MBH

MAV

MEZZANINE

MANUFACTURING

MECHANICAL

MAXIMUM

BTUH x 1000

LF

LP

LWT

LINEAR FEET

LOW PRESSURE

FSS FUSED SAFETY SWITCH

S/S STAINLESS STEEL

RVNR REDUCED VOLTAGE, NON-REVERSING, MAGNETIC

FVNR FULL VOLTAGE, NON-REVERSING, MAGNETIC

MRS MOTOR RATED SWITCH

W WATTS

ACU-1 AIR CONDITIONING UNIT & TAG

AHU-1 AIR HANDLING UNIT & TAG

CC COOLING COIL

CP-1 CONDENSATE PUMP & TAG

DB DECIBELS

Dp DEWPOINT TEMPERATURE

EDH ELECTRIC COIL DUCT HEATER

CUH-1 CABINET UNIT HEATER & TAG

CU-1 CONDENSING UNIT & TAG

CW COLD WATER (DOMESTIC)

EER ENERGY EFFICIENCY RATIO

EF-1 EXHAUST FAN & TAG

E or EX. EXISTING

FCU-1 FAN COIL UNIT & TAG

H&V-1 HEATING AND VENTILATING UNIT & TAG

NOT ALL ABBREVIATIONS

SHOWN IN THIS LIST WERE

UTILIZED FOR THIS PROJECT.

AMERICAN SOCIETY OF HEATING, REFRIGERATING,

AFLD AUTOMATIC FLOW LIMITING DEVICE

NOT APPLICABLEN/A

GENERAL PROJECT NOTESMECHANICAL ABBREVIATIONS( NOTE: SYMBOLS WITHIN THIS SCHEDULE ARE REPRESENTATIVE OF THOSE TYPICALLY FOUND ON THE DRAWINGS. ALL SYMBOLS MAY NOT APPEAR ON THIS SET OF DRAWINGS. )MECHANICAL SYMBOLS

DUCTWORKVALVES

GAUGE CONNECTION ONLY

PLUG VALVE WITH PRESSURE

GLOBE VALVE

THREE WAY VALVE

AUTOMATIC CONTROL VALVE

ANGLE VALVE

BALL VALVE

ISOLATION VALVE

CHECK VALVE

BUTTERFLY VALVE

CONTROL VALVE

PRESSURE INDEPENDANT

ACCESSORIES

PIPE UP

MISCELLANEOUS

DRAWING NUMBER WHERE SECTION

EMERGENCY STOP SWITCH

DIRECTION OF AIR FLOW

CONNECT TO EXISTING SYMBOL

12x10 DUCT SYMBOL: RECTANGULAR

THERMOSTAT

IS LOCATED

T

FLOOR DRAIN

SECTION NUMBER

ESS

CFM

ARROW AND CFM

DUCT SYMBOL: ROUND12∅

DETAIL NUMBER

DRAWING NUMBER WHERE SHOWN

M4.1

M4

SIDEWALL RETURN REGISTER

CEILING RETURN GRILLE/

SIDEWALL EXHAUST REGISTER

CEILING EXHAUST GRILLE/

EXHAUST DUCTWORK W/O

DUCTLINER

SIDEWALL SUPPLY REGISTER

CEILING SUPPLY DIFFUSER/

TRANSITION

OVAL TRANSITION

SQUARE TO ROUND/

CONICAL TAKEOFF

RECTANGULAR DUCT

MITERED TAKEOFF

(SEE SCH)

(SEE SCH)

REGISTER (SEE SCH)

(SEE SCH)

REGISTER (SEE SCH)

REGISTER (SEE SCH)

EXHAUST DUCT UP

SUPPLY AND RETURN SIMILAR

RETURN DUCT DOWN

SUPPLY AND EXHAUST SIMILAR

SUPPLY DUCT, UP THROUGH ROOF

RETURN AND EXHAUST SIMILAR

EQUIPMENT

MOTOR OPERATED DAMPER

ACCESS DOOR

FIRE DAMPER WITH

DOOR

DETECTOR WITH ACCESS

DUCT MOUNTED SMOKE

WITH ACCESS DOOR

BALANCING DAMPER

ACCESS DOOR

SMOKE DAMPER WITH

FD

M

SD

DD

PIPING

LOW PRESSURE STEAM SUPPLY (15 PSI)

LOW PRESSURE STEAM CONDENSATE (15 PSI)

PC

LPS

LPC

HWR

HWS

PUMPED CONDENSATE

HOT WATER SUPPLY

HOT WATER RETURN

D

CHWS

CHWR

CONDENSATE DRAIN

CHILLED WATER SUPPLY

CHILLED WATER RETURN

TO REMAIN

TO BE REMOVED

EXISTING DUCT

EXISTING EQUIPMENT

TO REMAIN

TO BE REMOVED

EXISTING PIPING

EXISTING PIPING

TO REMAIN

EXISTING CONDENSATE DRAIN

TO BE REMOVED

EXISTING EQUIPMENT

TO REMAIN

EXISTING DUCT

NEW EQUIPMENT

NEW PIPING

NEW

DUCTWORK

D

A. ALL DUCT, PIPE, AND EQUIPMENT SHALL BE LATERALLY RESTRAINED TO

COMPLY WITH ASCE 7.

B. BEFORE FABRICATING ANY SHEET METAL DUCTWORK, COORDINATE LOCATION

AND SIZE WITH SPRINKLER & PLUMBING PIPING, CONDUITS, LIGHT FIXTURES,

STRUCTURAL, ETC. PLANS ARE SCHEMATIC AND ARE NOT SHOP DRAWINGS.

SUBMIT DUCTWORK COORDINATION DRAWINGS, AS SPECIFIED.

C. BEFORE SUBMITTING SHOP DRAWINGS, COORDINATE VOLTAGES AVAILABLE FOR

MECHANICAL EQUIPMENT AND PROVISION ALL STARTERS AND DISCONNECT

SWITCHES WITH ELECTRICAL CONTRACTOR.

D. MECHANICAL CONTRACTOR SHALL MAKE PROVISIONS FOR PROVIDING A

CONDENSATE DRAIN TRAP A MINIMUM OF 4" DEEP OR 1/2" PLUS THE STATIC

PRESSURE OF THE UNIT SUPPLY FAN.

E. ALL EQUIPMENT SHALL BE U.L. LISTED.

F. THE ELECTRICAL CONTRACTOR SHALL CONNECT ALL MECHANICAL EQUIPMENT;

PROVIDE DISCONNECTS, WIRING AND CONDUIT, INSTALL STARTERS, AND MOUNT

AND WIRE VFD, UNLESS OTHERWISE NOTED.

G. FIRE AND SMOKE DAMPERS SHALL BE INSTALLED IN COMPLETE ACCORDANCE

WITH THE MFR'S. U.L. LISTING AND INSTALLATION INSTRUCTIONS. FIRE AND

SMOKE DAMPERS SHALL HAVE SPECIFIC U.L. LISTING FOR THE CONSTRUCTION

IN WHICH THEY ARE INSTALLED.

H. MECHANICAL CONTRACTOR SHALL BE RESPONSIBLE FOR COORDINATION WITH

OTHER TRADES TO ELIMINATE CONFLICT WITH OTHER TRADES. ANY WORK

INSTALLED BY THIS CONTRACTOR THAT RESULTS IN CONFLICT, DUE TO LACK

OF COORDINATION BETWEEN TRADES, SHALL BE CHANGED AS DIRECTED BY

THE ARCHITECT/ENGINEER WITHOUT ADDITIONAL COMPENSATION TO THE

CONTRACTOR.

I. SMOKE DETECTORS SHALL BE FURNISHED BY ELECTRICAL CONTRACTOR AND

INSTALLED BY THE MECHANICAL CONTRACTOR. PROVIDE DUCT ACCESS DOOR

AT EACH DETECTOR. INSTALL DETECTORS IN COMPLETE ACCORDANCE WITH

THE MANUFACTURER'S INSTRUCTIONS.

J. MECHANICAL CONTRACTOR SHALL COORDINATE ROUTING OF DUCTWORK TO

ENSURE DUCTWORK DOES NOT PASS OVER ELECTRICAL PANELS.

K. THE DRAWINGS SHALL NOT BE SCALED FOR CONSTRUCTION PURPOSES. THE

SCALE, WHEN INDICATED IS INTENDED FOR GENERAL REFERENCE ONLY.

L. ALL SHUTDOWNS SHALL BE COORDINATED AND APPROVED THROUGH THE

CONTRACTOR OFFICER'S REPRESENTATIVE AND WILL REQUIRE ADVANCE NOTICE

OF TWO WEEKS.THIS TIME LENGTH MAY BE LONGER OR SHORTER FOR SOME

SHUTDOWNS AND SHALL BE AT THE OWNERS DISCRETION.

M. PROVIDE ESCUTCHEON PLATES WHERE DUCTS PENETRATE CEILINGS OR WALLS

IN AREAS EXPOSED TO VIEW. ESCUTCHEONS FOR DUCTS SHALL BE

CONSTRUCTED OF SAME MATERIAL AS DUCT. PIPE ESCUTCHEONS SHALL BE

CHROME-PLATED BRASS.

N. PROVIDE REMOVABLE ACCESS DOORS AT ALL MOTOR OPERATED DAMPERS,

FIRE DAMPERS, SMOKE DAMPERS, DUCT COILS, SMOKE DETECTORS, AND

SIMILAR ITEMS REQUIRING MAINTENANCE OR ADJUSTMENT.

O. PROVIDE FIRE CAULKING OR OTHER APPROVED FIRESTOP SYSTEM AT ALL

MECHANICAL PIPING PENETRATIONS OF RATED ASSEMBLY WITHIN THE LIMITS OF

CONSTRUCTION (NEW AND EXISTING).

NO SCALE

500 CFM

X - X - XC

VARIABLE OR CONSTANT VOLUME BOX WITH REHEAT

1 GPM

BOX NUMBER (C OR V INDICATES

HOT WATER GPM

CONSTANT OR VARIABLE FLOW)

ROUND HARD DUCTWORK

VARIABLE OR CONSTANT REGULATOR

ACCESS DOOR

SUPPLY CFM

REHEAT COIL

AIR HANDLING UNIT NUMBER

FLOOR

PIPE DOWN

DEMOLISH TO EXISTING SYMBOL

GHWR GLYCOL HOT WATER RETURN

GHWS GLYCOL HOT WATER SUPPLY

GWR GLYCOL WATER RETURN

GHS GLYCOL WATER SUPPLY

HPS HIGH PRESSURE STEAM SUPPLY

HPR HIGH PRESSURE STEAM RETURN

MPS MEDIUM PRESSURE STEAM SUPPLY

MPR MEDIUM PRESSURE STEAM RETURN

FLEXIBLE DUCTWORK WITH

INSULATION

LINEAR SLOT DIFFUSER/REGISTER

(SEE SCH)

MECHANICAL PHASING NOTES

PHASE 1A NEW WORK

• INSTALL TEMPORARY AIR HANDLING UNIT ON A TRAILER AT THE EXTERIOR OF THE

BASEMENT FLOOR PHYSICAL THERAPY ROOM. PROVIDE TEMPORARY SUPPLY AND

RETURN DUCTWORK THROUGH EXISTING WINDOWS AND CONNECT TO EXISTING

SUPPLY AND RETURN DUCTWORK.

PHASE 1B DEMOLITION

• DEMOLISH EXISTING AIR HANDLING UNIT 2-AHU-9, INCLUDING CONTROLS AND

EXTERNAL COMPONENTS SUCH AS HUMIDIFIERS, FINAL FILTERS, ETC. DEMOLISH

ASSOCIATED DUCTWORK AND PIPING WITHIN SERVICE BAY 2.

• DEMOLISH EXISTING EXHAUST AIR AND RELIEF AIR FANS WITHIN SERVICE BAY 2.

• DEMOLISH EXISTING TERMINAL UNITS AND NECESSARY BRANCH DUCTWORK,

PIPING, CONTROLS, THERMOSTATS, ACCESSORIES, ETC. ON THE BASEMENT

FLOOR IN AREA A.

PHASE 1C NEW WORK

• INSTALL NEW AIR HANDLING UNIT 2-AHU-9 IN SERVICE BAY 2. INSTALL NEW

EXTERNAL AIR HANDLING UNIT COMPONENTS INCLUDING THE HUMIDIFIER, FINAL

FILTERS, AND THE RETURN AIR FAN. INSTALL NEW GLYCOL ENERGY RECOVERY

LOOP AND PUMP. MAKE DUCTWORK AND PIPING CONNECTIONS TO EXISTING

MAINS IN SERVICE BAY 2 AND CORRIDOR CB-3.

• INSTALL NEW EXHAUST AIR FANS WITHIN SERVICE BAY 2.

• INSTALL NEW TERMINAL UNITS AND ASSOCIATED BRANCH DUCTWORK, PIPING,

DDC CONTROLS, THERMOSTATS, ACCESSORIES, ETC. ON THE BASEMENT FLOOR IN

AREA A.

PHASE 2A DEMOLITION AND NEW WORK

• REMOVE TEMPORARY DUCTWORK CONNECTIONS FROM TEMPORARY AIR

HANDLING UNIT.

• RELOCATE TEMPORARY AIR HANDLING UNIT AND TRAILER TO THE EXTERIOR OF

THE BASEMENT FLOOR MRI SUITE. PROVIDE TEMPORARY SUPPLY AND RETURN

DUCTWORK THROUGH EXISTING WINDOWS AND CONNECT TO EXISTING SUPPLY

AND RETURN DUCTWORK LOCATED WITHIN THE MRI SUITE ON THE BASEMENT

FLOOR. PROVIDE TEMPORARY SUPPLY AND RETURN DUCTWORK THROUGH

EXISTING WINDOWS AND CONNECT TO EXISTING SUPPLY AND RETURN DUCTWORK

LOCATED IN THE LABORATORY SPACE ON THE FIRST FLOOR.

PHASE 2B DEMOLITION

• DEMOLISH EXISTING AIR HANDLING UNIT 2-AHU-10, INCLUDING CONTROLS AND

EXTERNAL COMPONENTS SUCH AS HUMIDIFIERS, FINAL FILTERS, ETC. DEMOLISH

ASSOCIATED DUCTWORK AND PIPING WITHIN SERVICE BAY 32.

• DEMOLISH EXISTING EXHAUST AIR AND RELIEF AIR FANS WITHIN SERVICE BAY 32.

• DEMOLISH EXISTING TERMINAL UNITS AND NECESSARY BRANCH DUCTWORK,

PIPING, CONTROLS, THERMOSTATS, ACCESSORIES, ETC. ON THE BASEMENT

FLOOR IN AREA B AND ON THE FIRST FLOOR.

PHASE 2C NEW WORK

• INSTALL NEW AIR HANDLING UNIT 2-AHU-10 IN SERVICE BAY 32. INSTALL NEW

EXTERNAL AIR HANDLING UNIT COMPONENTS INCLUDING THE HUMIDIFIER, FINAL

FILTERS, AND THE RETURN AIR FAN. INSTALL NEW GLYCOL ENERGY RECOVERY

LOOP AND PUMP. MAKE DUCTWORK AND PIPING CONNECTIONS TO EXISTING

MAINS IN SERVICE BAY 32 AND CORRIDOR CB-6.

• INSTALL NEW EXHAUST AIR FANS WITHIN SERVICE BAY 32.

• INSTALL NEW TERMINAL UNITS AND ASSOCIATED BRANCH DUCTWORK, PIPING,

DDC CONTROLS, THERMOSTATS, ACCESSORIES, ETC. ON THE BASEMENT FLOOR IN

AREA B AND ON THE FIRST FLOOR.

PHASE 2D DEMOLITION

• REMOVE TEMPORARY AIR HANDLING UNIT CONNECTIONS TO EXISTING

DUCTWORK. REMOVE TEMPORARY AIR HANDLING UNIT IN IT'S ENTIRETY. RETURN

TO VA.

RETURN DUCTWORK W/O

DUCTLINER

SUPPLY DUCTWORK W/O

DUCTLINER

OUTSIDE AIR DUCTWORK W/O

DUCTLINER

Drawing File Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

BID DOCUMENTS

FULLY SPRINKLERED

Office of Construction and Facilities Management

U.S. Department of Veterans Affairs

B

C

D

E

F

A

B

C

D

E

F

21 4 5 6 7 8 9 10

Phase

DESIGNER OF RECORD STAMPCONSULTANT

321 4 5 6 7 8 9 10

MEPF ENGINEER:

of

ARCHITECT:

GUIDON

1221 N. PENNSYLVANIA STREET

INDIANAPOLIS, IN 46202

A u to d e s k D o c s /2

.1

V A

S a le m A

H U

R e p la c e m e n t-

C h a rl o tt e

E n g in e e rs /4

C

E C e n tr a l M o d e l.

rv t

/4 /2

:1

:4

P M

M001

MECHANICAL - SYMBOLS, NOTES,

AND DRAWING INDEX

REPLACE BUILDING 2 AIR

HANDLER UNITS

SALEM, VA

658-24-102

12/03/2025 GAT NRB

CHARLOTTE ENGINEERS, LLP

5838 MONROE ROAD

CHARLOTTE, NC 28212

MECHANICAL - DRAWING INDEX

Sheet

Number Sheet Name

M001 MECHANICAL - SYMBOLS, NOTES, AND DRAWING INDEX

M002 MECHANICAL - DETAILS

M003 MECHANICAL - SCHEDULES

M004 MECHANICAL - AHU SCHEDULES

M005 MECHANICAL - 2-AHU-9 SEQUENCE OF OPERATIONS

M006 MECHANICAL - 2-AHU-10 SEQUENCE OF OPERATIONS

M007 MECHANICAL - TERMINAL UNIT & EXHAUST FAN SEQUENCE OF OPERATIONS

M008 MECHANICAL - GLYCOL ENERGY RECOVERY SCHEMATIC

MH101A MECHANICAL - PHASE 1A - BASEMENT - AREA A

MD101B MECHANICAL - PHASE 1B DEMOLITION - BASEMENT - DUCTWORK - AREA A

MD102B MECHANICAL - PHASE 1B DEMOLITION - BASEMENT - PIPING - AREA A

MH101C MECHANICAL - PHASE 1C NEW WORK - BASEMENT - DUCTWORK - AREA A

MP101C MECHANICAL - PHASE 1C NEW WORK - BASEMENT - PIPING - AREA A

MH201A MECHANICAL - PHASE 2A - AREA B

MD201B MECHANICAL - PHASE 2B DEMOLITION - BASEMENT - DUCTWORK - AREA B

MD202B MECHANICAL - PHASE 2B DEMOLITION - BASEMENT - PIPING - AREA B

MD211B MECHANICAL - PHASE 2B DEMOLITION - FIRST FLOOR - DUCTWORK

MD212B MECHANICAL - PHASE 2B DEMOLITION - FIRST FLOOR - PIPING

MH201C MECHANICAL - PHASE 2C NEW WORK - BASEMENT - DUCTWORK - AREA B

MH211C MECHANICAL - PHASE 2C NEW WORK - FIRST FLOOR - DUCTWORK

MP202C MECHANICAL - PHASE 2C NEW WORK - BASEMENT - PIPING - AREA B

MP212C MECHANICAL - PHASE 2C NEW WORK - FIRST FLOOR - PIPING

MD201D MECHANICAL - PHASE 2D DEMOLITION - AREA B

34 70Revisions: Date:

Addendum 1 08/04/26

TI PI

TI PI FS

EXTEND TO

CLOSEST FLOOR DRAIN

1"

2" GWS

2" GWR

TI PI

PI

2-P-GER-9,

2-P-GER-10

SUCTION DIFFUSER

W/ STRAINER

2" GWR

CHECK

VALVE

AIR

SEPARATOR

EXPANSION

TANK

PRESSURE

REDUCING

VALVE

UNION

(TYPICAL)

CHECK

VALVE

(TYPICAL)

STRAINER

(TYPICAL)

BALL

VALVE

(TYPICAL)

2" GWS

GENERAL NOTES:

1. CONTRACTOR SHALL PROVIDE AND INSTALL PIPING, SUPPORTS, AND HYDRONIC SPECIALTIES NOT PROVIDED WITH PUMPING PACKAGE INCLUDING AIR SEPARATORS, EXPANSION TANKS, CHEMICAL FEEDERS, ISOLATORS, BYPASS VALVES, ETC. INSTALLATION SHALL BE IN COMPLIANCE WITH DESIGN DOCUMENTS AND MANUFACTURER AND INSTALLATION

MANUALS. SUBMIT DRAWINGS FOR APPROVAL TO ENGINEER.

GLYCOL ENERGY RECOVERY SYSTEM SEQUENCE OF OPERATIONS

1. PUMP DESCRIPTION

A. THE GLYCOL ENERGY RECOVERY PUMP SHALL BE CONTROLLED BY AN ECM THAT IS ENABLED THROUGH THE BAS.

ALL ECM PARAMETERS MUST BE AVAILABLE ON A DEDICATED BAS GRAPHIC FOR THE PUMP.

B. THE ECM FOR THE PUMP SHALL BE SET UP DURING THE INITIAL TEST AND BALANCE FOR FULL FLOW IN THE LOOP.

C. IF THE PUMP FAILS TO START, AN ALARM SHALL BE ROUTED TO THE BAS.

D. THE SYSTEM SHALL CHECK TEMPERATURE CONDITIONS EVERY MINUTE AND ADJUST SEQUENCE AS REQUIRED.

1. COOLING MODE

A. WHEN THE OUTSIDE AIR TEMPERATURE IS HIGHER THAN THE RETURN AIR TEMPERATURE, THE GLYCOL ENERGY

RECOVERY PUMP SHALL RUN AT FULL FLOW.

1. HEATING MODE

A. WHEN THE OUTSIDE AIR TEMPERATURE IS LOWER THAN 5 DEG F LOWER THAN THE SUPPLY AIR TEMPERATURE SETPOINT (50 DEG F (ADJ.)), THE GLYCOL ENERGY RECOVERY PUMP SHALL RUN AT FULL FLOW.

B. WHEN THE OUTSIDE AIR TEMPERATURE IS WITHIN 5 DEG F OF THE SUPPLY AIR TEMPERATURE SETPOINT

(BETWEEN 50 AND 55 DEG F (ADJ.)), THE PUMP SHALL MODULATE TO MINIMUM SPEED.

1. ECONOMIZER MODE

A. WHEN THE OUTSIDE AIR TEMPERATURE IS HIGHER THAN SUPPLY AIR TEMPERATURE SETPOINT (55 DEG F (ADJ.))

AND LOWER THAN THE RETURN AIR TEMPERATURE, THE PUMP SHALL RUN AT MINIMUM SPEED.

1. FREEZE/FROST PROTECTION

A. WHEN THE OUTSIDE AIR TEMPERATURE IS BELOW 10 DEF F (ADJ.) THE PUMP SHALL RUN AT FULL FLOW.

OPERATION 1. WHEN THE GLYCOL ENERGY RECOVERY SYSTEM IS ENABLED, THE GLYCOL ENERGY RECOVERY

PUMP SHALL BE ENABLED.

WATER BACKFLOW PREVENTER

(BY OTHERS)

1"

LEGEND

FS

TI

PI

M

WATER FLOW SWITCH

THERMOMETER IN PIPING WELL

PRESSURE GAUGE IN PIPING WELL

BALL VALVE

GATE VALVE

WATER FLOW BALANCING VALVE

MOTORIZED ISOLATION VALVE (2 WAY)

2" GWS

CHEMICAL

SHOT FEEDER

2" VALVE FOR

QUICK FILL

2" GWS

CONTROL VALVE (3 WAY)

UNION

CHECK VALVE

STRAINER

2" VALVE W/

BLIND FLANGE

1" CW MAKEUP PIPING

ISOLATION CONTROL VALVE

GLYCOL ENERGY RECOVERY SCHEMATIC

TIPI

TIPIFS

EXTEND TO

1"

2" VALVE WITH

BLIND FLANGE

QUICK FILL

AUTOMATIC

AIR VENT

CLOSEST FLOOR DRAIN

OUTSIDE AIR

ENERGY RECOVERY

COIL

2-ERC-9, 2-ERC-10

EXHAUST AIR

ENERGY RECOVERY

COIL

2-ERC-9E, 2-ERC-10E

Drawing File Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

BID DOCUMENTS

FULLY SPRINKLERED

Office of Construction and Facilities Management

U.S. Department of Veterans Affairs

B

C

D

E

F

A

B

C

D

E

F

21 4 5 6 7 8 9 10

Phase

DESIGNER OF RECORD STAMPCONSULTANT

321 4 5 6 7 8 9 10

MEPF ENGINEER:

of

ARCHITECT:

GUIDON

1221 N. PENNSYLVANIA STREET

INDIANAPOLIS, IN 46202

A u to d e s k D o c s /2

.1

V A

S a le m A

H U

R e p la c e m e n t-

C h a rl o tt e

E n g in e e rs /4

C

E C e n tr a l M o d e l.

rv t

/4 /2

:1

:4

P M

M008

MECHANICAL - GLYCOL ENERGY

RECOVERY SCHEMATIC

REPLACE BUILDING 2 AIR

HANDLER UNITS

SALEM, VA

658-24-102

08/04/2026 GAT NRB

CHARLOTTE ENGINEERS, LLP

5838 MONROE ROAD

CHARLOTTE, NC 28212

Revisions: Date:

Addendum 1 08/04/26