NATIONAL INSTITUTES OF HEALTH

BETHESDA, MARYLAND, U.S.A.

DEPARTMENT OF HEALTH & HUMAN SERVICES

U.S. PUBLIC HEALTH SERVICE

NIH BUILDING 4 - REPLACE AHUs 3, 4, & 4A

FINAL SUBMISSION

CAMPUS PLANVICINITY MAP

RM P

T

D

V

E

EN

O

H F

AT E

H

TH

AL

U

SNA

ER

M AS

SECI U

WORK REQUEST NUMBER: C112354

GES PROJECT NO. 2430-66105

BLDG. #4

DRAWING INDEX

SHEET GENERAL

G001 GENERAL COVER SHEET

KEY PLAN

MECHANICAL

M001 MECHANICAL COVER SHEET

MD101 LEVEL B2 DEMOLITION HVAC PLAN

M101 LEVEL B2 HVAC PLAN

M201 MECHANICAL SECTIONS

M301 MECHANICAL SCHEDULES

M501 MECHANICAL DETAILS

M601 MECHANICAL CONTROLS

ELECTRICAL

E001 ELECTRICAL COVER SHEET

ED101 LEVEL B2 DEMOLITION POWER PLAN

E101 LEVEL B2 POWER PLAN

E301 ELECTRICAL SCHEDULES

STRUCTURAL

S001 GENERAL STRUCTURAL NOTES

S101 B2 LEVEL PARTIAL FLOOR PLAN

S501 TYPICAL DETAILS

FP NOTES

1. CONSTRUCTION SITE MUST BE SEPARATED FROM SURROUNDING AREAS IN ACCORDANCE WITH NFPA 241 SECTION 4.13.4 AND DFM ADMINISTRATIVE INTERPRETATION 22-2.

2. DFM SHALL BE CONTACTED TO PERFORM WALL AND CEILING CLOSE-INS AND FINAL OCCUPANCY INSPECTION.

TE RM A EDP

LA

TH

H F

E

S

O

NT

S

MAN

HU

VICERE USA

SHEET OF TOTAL SHEET

D R

A W

IN

G

T

IT

L E

S E

A L

MARK DESCRIPTIONDATE

P R

O J E

C T

IT

L E

A/E CON. NO.

A/E TASK NO.

PROPERTY OF THE US GOVERNMENT

FOR OFFICIAL USE ONLY

DO NOT REMOVE THIS NOTICE

PROPERLY DESTROY DOCUMENTS WHEN NO LONGER

NEEDED

OFFICE OF

RESEARCH FACILITIES

DRAWING NO.

D R

A W

IN

G

R E

V

IS

IO

N

S C

O N

T R

A C

T O

R S

B U

IL

D

IN

G

P R

O

JE

C T

A /E

N am e an d

LO

G O

CONS. CONTR.

CONS. WORK

PRIME A/E

SUB A/E

CONSTR. CON.

FACILITY CODE

BUILDING NO.

NAME

STREET

CITY

STATE/ZIP

OTHER

BUILDING NO.

DESIGNED BY

DRAWN BY

CHECKED BY

FILE NAME

SPB TASK NO.

PROJ. OFFICER

PROJ. MGR.

SUBMISSION

SUB. DATE

WRK REQ. NO.

Salas O'Brien

BUILDING 4

NIH

9000 ROCKVILLE PIKE

BETHESDA

MARYLAND, 20892

75N99020D00010 75N99024F0002

N

IH

B U

IL

D

IN

G

R

EP

LA

C

E

AH

U s

3, A

N/A

C112354

KANIKA SHARMA

ANIL GIRI

FINAL SUBMISSION

05/13/2026 C112354

S T

R U

C T

U R

A L

E N

G

IN

E E

R

G

EN

ER

AL

C O

VE

R

S H

EE

T

G001

ID

CC

AG

GENERAL COVER SHEET

1 05/13/25 35% CD SUBMISSION

2 07/15/25 65% CD SUBMISSION

3 10/30/25 100% CD SUBMISSION

4 05/13/26 FINAL SUBMISSION

SECTOR

PLAN TYPE

SYSTEM TYPE

FLOOR LEVEL

DISCIPLINE

"0" LOWEST FLOOR

"1" NEXT FLOOR

LEVEL ETC.

"1" FOR DUCT WORK

"2" FOR PIPING

"1" FLOOR PLAN

"2" ENLARGED

FLOOR ETC.

"MD" DEMO

"M" NEW

WORK

M111A

ABBREVIATIONS

SHEET NUMBERING LEGEND

EXISTING TO REMAIN

EXISTING TO BE REMOVED

LIMIT OF DEMOLITION

NEW WORK

POINT OF CONNECTION NEW

TO EXISTING

VAV TERMINAL UNIT - COOLING ONLY

FPT TERMINAL UNIT WITH REHEAT

VAV TERMINAL UNIT WITH REHEAT COIL

CARBON DIOXIDE SENSOR (MOUNT 48" AFF)

CARBON MONOXIDE SENSOR

HUMIDISTAT (MOUNT 48" AFF)

THERMOSTAT (MOUNT 48" AFF)

SMOKE DETECTOR

DETAIL

RISER

SECTION

AABC ASSOCIATED AIR BALANCE

AAV AUTOMATIC AIR VENT

ABV ABOVE

AC AIR CONDITIONING UNIT

ACT ACOUSTICAL CEILING TILE

AD ACCESS DOOR

ADDT'L ADDITIONAL

ADJ ADJUST

AFC ABOVE FINISHED CEILING

AFCP AIR FLOW CONTROL PANEL

AFF ABOVE FINISHED FLOOR

AFM AIR FLOW MEASURING STATION

AHU AIR HANDLING UNIT

AL ALUMINUM

AMB AMBIENT

AMT AMOUNT

APD AIR PRESSURE DROP

ARCH ARCHITECT

ARI AMERICAN REFRIGERATION

AS AIR SEPARATOR

ASHRAE AMERICAN SOCIETY OF

REFRIGERATION AND

AIR CONDITIONING ENGINEERS

ASTM AMERICAN SOCIETY FOR TESTING

AND MATERIALS

ATU AIR TERMINAL UNIT

AUTO AUTOMATIC

B BOILER

BAL BALANCE/ING

BCU BUILDING CONTROL UNIT

BHP BOILER HORSEPOWER/BRAKE

HORSEPOWER

BOP BOTTOM OF PIPE

BLDG BUILDING

BLW BELOW

BOS BOTTOM OF STEEL

BPD BACK PRESSURE DAMPER

BTUH BRITISH THERMAL UNIT PER HOUR

CA COMBUSTION AIR

CAD CEILING AIR DIFFUSER

CAL COMBUSTION AIR LOUVER

CAP CAPACITY

CAV CONSTANT AIR VOLUME

CC COOLING COIL

CF CENTRIFUGAL FAN

CFM CUBIC FEET PER MINUTE

CLG CEILING

CO CLEAN OUT

CONC CONCRETE

COND CONDITIONING

CONN CONNECT/CONNECTION

CONT CONTINUATION

CP CIRCULATING PUMP

CSR CEILING SUPPLY REGISTER

CU CONDENSING UNIT

CV CONTROL VALVE

CW COLD WATER

DB DRY BULB

dB DECIBEL

DDC DIRECT DIGITAL CONTROL

ΔP PRESSURE DROP

DIA DIAMETER

DIFF DIFFERENCE

DISC SW DISCONNECT SWITCH

DN DOWN

DP DEW POINT

DTL DETAIL

DWG DRAWING

DX DIRECT EXPANSION

(E) EXISTING TO REMAIN

M MOTORIZED DAMPER

MA MIXED AIR

MAT MIXED AIR TEMPERATURE

MAX MAXIMUM

MBH ONE THOUSAND BTUH

MC MECHANICAL CONTRACTOR

MCC MOTOR CONTROL CENTER

MD MANUAL DAMPER

MECH MECHANICAL

MER MECHANICAL EQUIPMENT ROOM

MFGR MANUFACTURER

MIN MINIMUM

MUA MAKE-UP AIR

MUAU MAKE-UP AIR UNIT

N/A NOT APPLICABLE

NC NORMALLY CLOSED/NOISE CRITERIA

NEC NATIONAL ELECTRICAL CODE

NG NATURAL GAS

NO NUMBER/NORMALLY OPEN

NTS NOT TO SCALE

OA OUTSIDE AIR

OAF OUTSIDE AIR FAN

OAL OUTSIDE AIR LOUVER

OBD OPPOSED BLADE DAMPER

OC ON CENTER

OCC OCCUPIED

OF OVERFLOW

OPP OPPOSITE

ORIG ORIGINAL

O&M OPERATION AND MAINTENANCE

P PUMP

PC PLUMBING CONTRACTOR

PD PRESSURE DROP

PDCV PRESSURE DIFFERENTIAL CONTROL

PH PHASE

PRV PRESSURE REDUCING VALVE

PPH POUNDS PER HOUR

PRESS PRESSURE

PSI POUNDS PER SQUARE INCH

PSIG POUNDS PER SQUARE INCH GAUGE

PVC POLYVINYL CHLORIDE

QTY QUANTITY

R RELOCATED

SD

CO

H

T

CO2

V V

V

DOUBLE LINE DUCTWORK

MITERED 90° ELBOW, ROUND OR FLAT OVAL

90° ELBOW, ROUND OR FLAT OVAL

(SMOOTH OR 5 PIECE ELBOWS)

45° ELBOW, RECTANGULAR

90° ELBOW, RECTANGULAR WITHOUT

TURING VANES

INCLINED DROP W/ RESPECT TO AIR

FLOW, ROUND OR FLAT OVAL

INCLINED RISE W/ RESPECT TO AIR

FLOW, ROUND OR FLAT OVAL

INCLINED DROP W/ RESPECT TO AIR

FLOW, RECTANGULAR

INCLINED RISE W/ RESPECT TO AIR

FLOW, RECTANGULAR

SMOKE DAMPER

COMBINATION FIRE/SMOKE DAMPER

FIRE DAMPER

BACK DRAFT DAMPER

MOTORIZED DAMPER

VOLUME DAMPER

FLAT OVAL DUCT (FIRST FIGURE IS

FOR SIDE SHOWN, SECOND FIGURE

IS FOR SIDE NOT SHOWN)

ROUND DUCT

RECTANGULAR DUCT (FIRST FIGURE IS

FOR SIDE SHOWN, SECOND FIGURE IS

FOR SIDE NOT SHOWN)

D

R

D

R

300∅

300x150

300x150

FD

DUCT TRANSITION, RECTANGULAR,

ROUND, OR FLAT OVAL

DUCT TRANSITION, RECTANGULAR TO

ROUND OR FLAT OVAL

DUCT TRANSITION, ROUND OR

FLAT OVAL TO RECTANGULAR

VD

FSD

SD

HUMIDIFIER

STATIC PRESSURE SENSOR

CEILING DIFFUSER (CD) OR GRILLE

(CG) [SUPPLY]

CEILING REGISTER (CR) OR GRILLE

(CG) [RETURN OR EXHAUST]

CEILING DIFFUSER (ARROWS INDICATE

THROW DIRECTIONS)

CEILING DIFFUSER (ARROWS INDICATE

THROW DIRECTIONS)

90° ELBOW TURNED DOWN, RECTANGULAR

RETURN

90° ELBOW TURNED UP, RECTANGULAR

RETURN

BRANCH DUCT, "Y" FITTING, ROUND OR FLAT

OVAL

BRANCH DUCT, CONICAL TEE FITTING, ROUND

OR FLAT OVAL

BRANCH DUCT, CONICAL LATERAL FITTING,

ROUND OR FLAT OVAL

TAP-IN BRANCH, RECTANGULAR

DIVIDED FLOW FITTING

45° ELBOW, ROUND OR FLAT OVAL

(SMOOTH OR 3 PIECE ELBOWS)

VD

VD

VD

SPS

90° ELBOW TURNED DOWN, RECTANGULAR

[SUPPLY]

90° ELBOW TURNED UP, RECTANGULAR [SUPPLY]

FLOW DIRECTION ARROW

B

M

H

FLEX DUCT CONNECTION

90° ELBOW TURNED UP, RECTANGULAR

EXHAUST

ACCESSORIES

90° ELBOW, RECTANGULAR WITH

TURING VANES

ACCESS DOOR IN DUCTAD

90° ELBOW TURNED DOWN, RECTANGULAR

EXHAUST

90° ELBOW TURNED UP ROUND, FLAT OVAL

SIMILAR SUPPLY / RETURN / EXHAUST

90° ELBOW TURNED DOWN ROUND, FLAT

OVAL SIMILAR SUPPLY / RETURN / EXHAUST

ELECTRICAL VAV TERMINAL UNIT

(WITH ANNOTATOR OPTIONAL)

SUPPLY DIFFUSER

RETURN GRILLE

EXHAUST REGISTER

BACKDRAFT DAMPER

FIRE DAMPER

FIRE/SMOKE DAMPER

MOTORIZED DAMPER

SMOKE DAMPER

VOLUME DAMPER

FD

FSD

SD

BDD

M

EQUIPMENT

SYMBOLS

GENERAL PIPING

FLANGE CONNECTION

FLEXIBLE CONNECTOR

PIPE CONNECTION - BOTTOM

PIPE CONNECTION - TOP

PIPE DOWN

PIPE END CAP

PIPE REDUCER - CONCENTRIC

PIPE REDUCER - ECCENTRIC

PIPE UP

UNION CONNECTION

BALL VALVE

BUTTERFLY VALVE

CHECK VALVE

GLOBE VALVE

SHUT-OFF VALVE

PRESSURE REDUCING VALVE

RELIEF VALVE

SOLENOID VALVE

VALVE IN RISER

Y STRAINER

Y STRAINER (WITH VALVE)

2-WAY AUTOMATIC CONTROL VALVE

3-WAY AUTOMATIC CONTROL VALVE

PRESSURE GAUGE WITH GAUGE COCK

THERMOMETER

AUTOMATIC AIR VENT

DIRECTION OF PIPE PITCH

FLOOR DRAIN

FLOW DIRECTION

MANUAL AIR VENT

PIPE CONTINUES

BOILER FEEDWATER

COMPRESSED AIR

CONDENSATE DRAIN

CHILLED WATER RETURN

CHILLED WATER SUPPLY

CONDENSER WATER RETURN

CONDENSER WATER SUPPLY

CITY WATER

DRAIN

DUAL TEMPERATURE RETURN

DUAL TEMPERATURE SUPPLY

FUEL OIL RETURN

FD

BFW

CA

CD

CHR

CHS

CR

CS

CW

D

DTR

DTS

FOR

FUEL OIL SUPPLY

FUEL OIL VENT

HIGH PRESSURE CONDENSATE RETURN

HIGH PRESSURE STEAM SUPPLY

HOT WATER RETURN

HOT WATER SUPPLY

LOW PRESSURE CONDENSATE RETURN

LOW PRESSURE STEAM SUPPLY

MEDIUM PRESSURE CONDENSATE RETURN

MEDIUM PRESSURE STEAM SUPPLY

PUMPED CONDENSATE RETURN

REFRIGERANT LIQUID

REFRIGERANT SUCTIONRS

RL

PCR

MPS

MPR

LPS

LPR

HWS

HWR

HPS

HPR

FOV

FOS

PIPE FITTINGS/VALVES

MECHANICAL GENERAL NOTES

GENERAL

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

C.

D.

11.

12.

13.

14.

15.

16.

17.

18.

19.

THE INTENT OF THESE DRAWINGS IS TO PROVIDE COMPLETE AND PROPERLY

FUNCTIONING HVAC SYSTEMS. PROVIDE ALL LABOR AND MATERIAL NECESSARY TO

ACHIEVE SUCH ENDS. CONTRACTOR IS OBLIGATED TO EXAMINE PLANS. ANY

OBSERVED FAULTS OR AMBIGUITY IN THESE PLANS SHALL BE CALLED TO THE

ATTENTION OF THE OWNER'S REPRESENTATIVE IMMEDIATELY, SO THAT THE MATTER

MAY BE RESOLVED PRIOR TO SUBMISSION OF BIDS. BY SUBMISSION OF BID, THE

CONTRACTOR SHALL ACKNOWLEDGE ACCEPTANCE OF THESE PLANS AS AN

ADEQUATE DEFINITION OF THE SCOPE OF WORK AND EXTRA COST CLAIMS BASED ON

INADEQUACY OF PLANS WILL NOT BE CONSIDERED.

THE ELECTRICAL CONTRACTOR IS REQUIRED TO PROVIDE POWER FOR ALL

MECHANICAL EQUIPMENT. DURING BID PERIOD AND AGAIN PRIOR TO EQUIPMENT

ORDERING, THE (GENERAL CONTRACTOR AND THE) MECHANICAL CONTRACTOR

SHALL COORDINATE WITH THE ELECTRICAL CONTRACTOR TO VERIFY THAT ALL

EQUIPMENT ARE POWERED, AND PROPER VOLTAGE/WIRING/CAPACITY IS PROVIDED.

IN THE EVENT OF REQUIREMENTS AMBIGUITY OR CONFLICT BETWEEN TRADES, THE

CONTRACTOR IS REQUIRED TO GENERATE AN RFI ADDRESSING THE ISSUE AND

REQUESTING CLARIFICATION. FAILURE TO DO SO WILL NEGATE HIS RIGHT FOR A

CHANGE ORDER OR REQUEST FOR ADDITIONAL FUNDS DURING CONSTRUCTION

RELATING TO THIS ISSUE.

ALL WORK ON THIS PROJECT SHALL BE INSTALLED IN ACCORDANCE WITH THE

LATEST APPLICABLE CODES AND REGULATIONS.

THESE DRAWINGS ARE DIAGRAMMATIC AND INTENDED TO DEPICT THE GENERAL

LOCATION OF HVAC SYSTEM COMPONENTS. CONSULT THE ARCHITECTURAL PLANS

FOR PROPER DIMENSIONS AND LOCATION OF EQUIPMENT.

THE CONTRACTOR SHALL COORDINATE THE INSTALLATION OF HVAC WORK WITH

EXISTING CONDITIONS AND THE WORK OF OTHER TRADES. MINOR DEVIATIONS FROM

THE PLANS MAY BE MADE TO AVOID MINOR CONFLICTS. WHEN MAJOR CONFLICTS

ARE APPARENT, THE ARCHITECT SHALL BE ADVISED IMMEDIATELY, AND AFFECTED

WORK SHALL NOT BE INSTALLED UNTIL THE CONFLICT HAS BEEN RESOLVED.

THE CONTRACTOR SHALL OBTAIN AND PAY FOR PERMITS AND ARRANGE FOR

INSPECTIONS BY LOCAL AUTHORITIES HAVING JURISDICTION.

PROVIDE OPENINGS IN BUILDING CONSTRUCTION FOR PASSAGE OF PIPING AND

DUCTWORK. DO NOT PENETRATE STRUCTURAL MEMBERS WITHOUT PRIOR

APPROVAL OF ARCHITECT AND STRUCTURAL ENGINEER. VERIFY SLAB PENETRATION

LOCATIONS PRIOR TO PROCEEDING WITH WORK IN ORDER TO LOCATE

OBSTRUCTIONS EMBEDDED IN SLAB. SUBMIT DRAWING OF ALL SLAB PENETRATIONS

FOR LANDLORD/ARCHITECT/ENGINEER APPROVAL PRIOR TO PROCEEDING WITH

WORK.

PROVIDE FIRE DAMPERS AT ALL PENETRATIONS INTO FIRE RATED STRUCTURE, SUCH

AS FIRE RATED PARTITIONS, ETC. ALL FIRE DAMPERS SHALL BEAR THE U.L. LABEL.

ALL NECESSARY ALLOWANCES AND PROVISIONS SHALL BE MADE BY THIS

CONTRACTOR FOR BEAMS, COLUMNS OR OTHER OBSTRUCTIONS OF THE BUILDING

OR THE WORK OF OTHER CONTRACTORS, WHETHER OR NOT SAME IS INDICATED.

WHERE NECESSARY TO AVOID OBSTRUCTIONS THE DUCTS SHALL BE TRANSFORMED,

DIVIDED, OFFSET, RAISED OR LOWERED WITH THE REQUIRED FREE AREA BEING

MAINTAINED WHILE MAINTAINING DESIGNED CEILING HEIGHTS.

PROVIDE FLEXIBLE DUCT CONNECTIONS WHEREVER DUCTWORK CONNECTS TO

VIBRATING EQUIPMENT. CONSTRUCT FLEXIBLE CONNECTIONS OF NEOPRENE-

COATED FLAMEPROOF FABRIC CRIMPED INTO DUCT FLANGES FOR ATTACHMENT TO

DUCT AND EQUIPMENT. MAKE AIRTIGHT JOINT. PROVIDE ADEQUATE JOINT

FLEXIBILITY TO ALLOW FOR THERMAL, AXIAL, TRANSVERSE, AND TORSIONAL

MOVEMENT, AND ALSO CAPABLE OF ABSORBING VIBRATIONS OF CONNECTED

EQUIPMENT.

PROVIDE FLEXIBLE CONNECTORS AT THE INLET AND OUTLET CONNECTION

FOR EACH FAN AND AIR HANDLING UNIT.

EACH FLEXIBLE CONNECTOR SHALL ALLOW 1" OF FREE MOVEMENT AND

SHALL BE COMPLETELY AIR TIGHT.

PROVIDE NEOPRENE COATED GLASS FABRIC MATERIAL, MINIMUM 30 OZ. PER

SQUARE YARD.

CONTRACTOR SHALL BRACE DUCTWORK (AS REQUIRED) AT ALL FLEXIBLE

CONNECTORS TO ENSURE THAT DUCTWORK IS KEPT IN ALIGNMENT.

INSTALL ALL EQUIPMENT IN ACCORDANCE WITH THE MANUFACTURER'S

RECOMMENDATIONS.

CONTROLS: THE CONTRACTOR SHALL FURNISH AND INSTALL ALL NECESSARY

WIRING, TRANSFORMERS, CONTROLS, HARDWARE, FITTINGS, PARTS AND

ACCESSORIES INCLUDING ALL SAFETY DEVICES REQUIRED FOR PROPER

INSTALLATION AND OPERATION OF SYSTEM IN ACCORDANCE WITH ALL LOCAL CODE

REQUIREMENTS. THE CONTROLS CONTRACTOR SHALL PROVIDE ELECTRICAL POWER

TO ALL CONTROL DEVICES AND EQUIPMENT FROM THE NEAREST POWER SOURCE

INDICATED FOR CONTROLS POWER AND IDENTIFIED ON ELECTRICAL DRAWINGS. THE

CONTRACTOR SHALL VERIFY ALL VOLTAGE AND POWER REQUIREMENTS AND

COORDINATE WITH ALL TRADES AS REQUIRED. CONTROLS SUCH AS

THERMOSTATS/SENSORS OF AHUS, FCUS, UNIT HEATERS, VAV BOXES, DUCT REHEAT

COILS, ETC., SHALL BE PROVIDED BY THE UNIT MANUFACTURER AND

INSTALLED/WIRED BY THIS CONTRACTOR UNLESS OTHERWISE INDICATED. FOR DDC

APPLICATION THESE DEVICES SHALL BE DDC READY. INTERLOCK AND CONDITIONAL

OPERATION OF SYSTEMS (FANS, MOTORS, ETC.), SHALL BE PROVIDED/INSTALLED BY

THE CONTRACTOR VIA CURRENT RELAYS ON THE MOTOR STARTER AND LOW

VOLTAGE CONTROL WIRING. PROVIDE 24VOLT TRANSFORMER, SWITCHES,

THERMOSTATS (IF THERMOSTATIC CONTROL IS REQUIRED) AND WIRING FOR A

COMPLETE INSTALLATION THAT MEETS THE DESIGN INTENT OF THE SYSTEM

OPERATION.

PROVIDE MOTOR STARTERS, ELECTRICAL DISCONNECTS, TRANSFORMERS, CONTROL

WIRING AND ALL OTHER REQUIRED ACCESSORIES NECESSARY FOR AUTOMATIC

OPERATION OF MECHANICAL EQUIPMENT.

THERMOSTAT SHALL BE INSTALLED ON THE WALL 48" ABOVE FINISHED FLOOR WHERE

SHOWN ON THE FLOOR PLANS, COORDINATE W/ ARCHITECT.

MECHANICAL CONTRACTOR SHALL THOROUGHLY CLEAN HIS WORK AREA DAILY.

MECHANICAL CONTRACTOR SHALL ALSO REMOVE ALL TRASH AFTER WORK

COMPLETION.

WHERE EXISTING FIELD CONDITIONS ARE DIFFERENT THAN SHOWN, THE

CONTRACTOR SHALL ADVISE THE ENGINEER OF DISCREPANCIES WHICH WILL AFFECT

THE PROPOSED WORK PRIOR TO BEGINNING WORK.

SYMBOLS SHOWN ON SCHEDULES DEFINE TYPE OF EQUIPMENT ONLY. CONTRACTOR

IS RESPONSIBLE FOR RESEARCHING DRAWINGS FOR EXACT QUANTITIES REQUIRED

OF EACH TYPE.

PRIOR TO INSTALLATION OF NEW WORK, CONTRACTOR SHALL VERIFY THAT ALL

DUCTWORK, EQUIPMENT, PIPING, ETC., SHALL BE FREE FROM INTERFERENCE WITH

EXISTING CONDITIONS. WHERE CONFLICTS OCCUR, CONTRACTOR SHALL

IMMEDIATELY CONTACT THE OWNER. WHERE THE WORK OF VARIOUS TRADES WILL

BE INSTALLED IN CLOSE PROXIMITY TO ONE ANOTHER, OR WHERE THERE IS

EVIDENCE THAT THE WORK OF ONE TRADE WILL INTERFERE WITH WORK OF OTHER

TRADES, THE CONTRACTOR SHALL ASSIST IN WORKING OUT SPACE CONDITIONS TO

MAKE A SATISFACTORY ADJUSTMENT. IF THE CONTRACTOR ALLOWS ONE TRADE TO

INSTALL HIS WORK BEFORE COORDINATING WITH WORK OF OTHER TRADES, THE

CONTRACTOR SHALL MAKE NECESSARY CHANGES TO CORRECT THE CONDITION

WITHOUT EXTRA CHARGE.

THE CONTRACTOR SHALL LOCATE ALL EQUIPMENT WHICH MUST BE SERVICED,

OPERATED, MAINTAINED IN FULLY ACCESSIBLE POSITION. EQUIPMENT SHALL

INCLUDE, BUT NOT BE LIMITED TO, VALVES, TRAPS, CLEANOUTS, MOTORS,

CONTROLLERS, DRAIN POINTS, ETC. IF REQUIRED FOR ACCESSIBILITY, FURNISH

ACCESS DOORS FOR THIS PURPOSE. MINOR DEVIATIONS FROM DRAWINGS MAY BE

MADE TO ALLOW FOR BETTER ACCESSIBILITY.

A.

B.

20.

22.

23.

24.

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

21.

25.

ALL EQUIPMENT WHICH REQUIRES INTERFACE WITH THE ELECTRICAL TRADE, SUCH AS

CONTROLLING DEVICES, DISCONNECT SWITCHES, MOTORS, ETC., SHALL BE FULLY

COORDINATED BETWEEN ALL TRADES.

LOCATION OF SWITCHES FOR EXHAUST FANS SHALL BE COORDINATED WITH LIGHT

SWITCHES AND THERMOSTATS AND ALL LOCATIONS SHALL BE APPROVED BY THE

ARCHITECT. BATHROOM EXHAUST FAN SWITCHES SHALL BE INTERLOCKED WITH

BATHROOM LIGHT SWITCHES.

ALL WORK TO BE GUARANTEED FOR TWO YEAR AGAINST LABOR AND MATERIALS. ANY

DEFECTIVE MATERIALS OR WORKMANSHIP, AS WELL AS DAMAGE TO THE WORK OF ALL

TRADES RESULTING FROM SAME, SHALL BE REPLACED OR REPAIRED AS DIRECTED FOR

THE DURATION OF THE GUARANTEE PERIOD. TIME FOR THIS GUARANTEE SHALL BEGIN

FROM THE DATE OF ACCEPTANCE OF THE COMPLETE WORK BY THE OWNER OR HIS

APPOINTED REPRESENTATIVE. NOTE: THESE GUARANTEES SHALL BE SUBMITTED TO

THE TENANT AND/OR BUILDING OWNER FOR RECORD PURPOSES.

AS USED IN DRAWINGS AND SPECIFICATIONS FOR MECHANICAL WORK, CERTAIN NON-

TECHNICAL WORDS SHALL BE UNDERSTOOD TO HAVE SPECIFIC MEANINGS AS

FOLLOWS REGARDLESS OF INDICATIONS TO THE CONTRARY IN THE GENERAL

CONDITION OR OTHER DOCUMENTS GOVERNING THE MECHANICAL WORK.

"FURNISH" - PURCHASE AND DELIVER TO THE PROJECT SITE COMPLETE WITH EVERY

NECESSARY APPURTENANCE AND SUPPORT, ALL AS PART OF THE MECHANICAL WORK.

PURCHASING SHALL INCLUDE PAYMENT OF ALL SALES TAXES AND OTHER

SURCHARGES AS MAY BE REQUIRED TO ASSURE THAT PURCHASED ITEMS ARE FREE OF

ALL LIENS, CLAIMS OR ENCUMBRANCES.

"INSTALL" - UNLOAD AT THE DELIVERY POINT AT THE SITE AND PERFORM EVERY

OPERATION NECESSARY TO ESTABLISH SECURE MOUNTING AND CORRECT OPERATION

AT THE PROPER LOCATION IN THE PROJECT, ALL AS PART OF THE MECHANICAL WORK.

"PROVIDE" - "FURNISH" AND "INSTALL".

"NEW" - MANUFACTURED WITHIN THE PAST TWO YEARS AND NEVER BEFORE USED.

PASSAGES OF PIPES, CONDUITS, BUS DUCTS, CABLES, WIRES, AIR DUCTS, PNEUMATIC

DUCTS AND SIMILAR BUILDING SERVICE EQUIPMENT THROUGH FIRE BARRIERS SHALL

HAVE THE SPACE BETWEEN THE PENETRATING ITEM AND FIRE BARRIER FILLED WITH

MATERIAL CAPABLE OF MAINTAINING THE FIRE RESISTANCE RATING OF THE FIRE

BARRIER PRODUCT. PRODUCT USED MUST MEET TEST METHODS BY ASTM E814 OR

NFPA 251 FOR FIRE RATING.

ALL MATERIAL, EQUIPMENT AND ACCESSORIES, FURNISHED AND INSTALLED SHALL BE

NEW AND EQUAL TO OR SURPASS THE QUALITY OF SIMILAR MATERIALS AS SCHEDULES.

ALL MATERIALS, EQUIPMENT AND METHODS SHALL BE AS SPECIFIED IN THE BASE

BUILDING CONTRACT DOCUMENTS UNLESS NOTED OTHERWISE.

SCOPE OF WORK DOES NOT INCLUDE ANY FIRE-RATED PENETRATIONS OR

ALTERATIONS TO EXISTING FIRE PROTECTION OR LIFE SAFETY SYSTEMS.

POWDER-ACTIVATED TOOLS REQUIRE WRITTEN APPROVAL BY THE PROJECT OFFICER

AND PRESENTED UPON REQUEST WHEN IN USE. USE OF THESE TOOLS ALSO REQUIRES

PROOF OF LICENSING AND TRAINING WHICH MUST ALSO BE PROVIDED UPON REQUEST.

CONTRACTOR SHALL PROVIDE A LOG OF "WHO, WHAT, WHERE AND WHEN" FOR ANY

POWER OR POWDER ACTIVATED TOOLS THAT WILL BE USED. EXAMPLES OF SUCH

TOOLS INCLUDE: GAS, AIR, OR ELECTRICALLY POWERED TOOLS SUCH AS NAIL-GUNS,

RAM TOOLS, OR ANY OTHER TOOL THAT CAN PROPEL A PROJECTILE AND MIGHT BE

WEAPONIZED. THE LOG SHALL BE CONTINUALLY UPDATED DURING CONSTRUCTION,

MADE AVAILABLE UPON REQUEST, AND PROVIDED TO THE PROJECT OFFICER AT WORK

COMPLETION.

ANY DISCOVERED DISCREPANCY BETWEEN THE CONTRACT DOCUMENTS AND ACTUAL

SITE CONDITIONS MAY BE BROUGHT TO THE ARCHITECT/ENGINEER'S ATTENTION PRIOR

TO BID FOR CLARIFICATION. AFTER A CONTRACT IS EXECUTED CONTRACTOR SHALL

SUBMIT A REQUEST FOR INFORMATION.

THE REQUIRED DEMOLITION SHALL NOT BE LIMITED TO THAT PORTION SHOWN ON THE

PLANS ALONE, BUT SHALL INCLUDE ALL NECESSARY WORK COINCIDENTAL THERETO

AND/OR WORK INDICATED ELSEWHERE ON THE DRAWINGS OR IN THE SPECIFICATIONS.

CONTRACTOR SHALL NOT VIOLATE THE PHYSICAL SECURITY OF THE BUILDING DURING

DEMOLITION OR ASSOCIATED OPERATIONS. SECURITY SHALL BE CLOSELY

COORDINATED WITH THE OWNER'S REPRESENTATIVE.

CONTRACTOR SHALL SCHEDULE ALL WORK, INCLUDING INTERRUPTION OF EXISTING

UTILITIES, WITH THE OWNER, PRIOR TO STARTING WORK. CONTRACTOR SHALL NOTE

THAT THE BUILDING SHALL BE OCCUPIED AND IN USE DURING THE PERIOD OF TIME THIS

CONTRACT IS BEING PERFORMED.

DEMOLITION SHALL GENERALLY BE ARRANGED TO AGREE WITH THE ACCOMPLISHMENT

OF WORK UNDER THE VARIOUS PHASES AND IN COORDINATION WITH THE REQUIRED

MODIFICATIONS.

DO NOT ALTER THE EXISTING SYSTEMS WHICH ARE LOCATED IN AREAS NOT IN SCOPE

OF WORK UNLESS SPECIFICALLY INDICATED. PROTECT EXISTING SYSTEMS WITHIN THE

LIMITS OF WORK WHICH ARE TO BE RETAINED. ANY DAMAGE TO THE EXISTING SYSTEMS

DUE TO CONTRACTOR NEGLIGENCE SHALL BE REPAIRED AND/OR REPLACED TO ITS

ORIGINAL CONDITION TO THE COMPLETE SATISFACTION OF THE OWNER, AND AT NO

COST TO THE OWNER.

UNLESS OTHERWISE NOTED, ALL FIXTURES/EQUIPMENT INDICATED TO BE REMOVED

SHALL ALSO HAVE ALL ASSOCIATED PIPING REMOVED BACK TO THE NEAREST

HORIZONTAL MAIN, RISER, OR STACK CONNECTION AND CAPPED IN A CONCEALED

LOCATION.

UNLESS OTHERWISE INDICATED, EXISTING PIPING TO REMAIN FOLLOWING REMOVAL OF

ADJACENT PORTIONS OF PIPING SHALL BE CAPPED/PLUGGED IN A CONCEALED

LOCATION OR MADE READY FOR EXTENSION UNDER NEW WORK. FOR AREAS WITHOUT

AN EXISTING CEILING IN WHICH A NEW CEILING WILL NOT BE INSTALLED, THE PIPING

SHALL BE CAPPED/PLUGGED IN A LOCATION TO PROVIDE THE MAXIMUM POSSIBLE

HEADROOM. UNDER NO CIRCUMSTANCE MAY AN EXISTING PIPE BE LEFT OPEN.

UNLESS OTHERWISE INDICATED, ALL FIXTURES, EQUIPMENT, PIPING, AND ACCESSORIES

WHICH HAVE TO BE REMOVED SHALL BECOME THE PROPERTY OF THE CONTRACTOR

AND SHALL BE REMOVED FROM THE PROJECT SITE AS SOON AS POSSIBLE.

"CONCEALED LOCATION" IS DEFINED AS BEING ABOVE FINISHED CEILING, BELOW

FINISHED FLOOR, OR WITHIN FINISHED WALL OR PARTITION. SEE ARCHITECTURAL

PLANS FOR FINISH INFORMATION.

COPPER AND STEEL PIPING SHALL BE CAPPED USING COMMERCIALLY MANUFACTURED

"CAPS". CAST IRON SOIL PIPE SHALL BE PLUGGED USING COMMERCIALLY

MANUFACTURED "BLIND PLUGS". CAP/PLUG INSTALLATION SHALL BE IN ACCORDANCE

WITH NEW WORK INSTALLATION PROCEDURES. CRIMPING OF TUBING IS NOT

ACCEPTABLE.

ALL EXISTING TO REMAIN PIPING SHALL BE COORDINATED WITH THE MECHANICAL

DUCTWORK, AND IF REQUIRED PIPING SHALL BE REMOVED AND RELOCATED TO BETTER

LOCATION.

IF MOLD OR ASBESTOS IS ENCOUNTERED STOP ALL WORK IN THE AFFECTED AREA

AND NOTIFY NIH IMMEDIATELY.

ANY EXISTING ELECTRONIC SECURITY DEVICES (E.G. CARD READERS, CAMERAS, ALARM

SYSTEM), CABLING, ETC. THAT NEED TO BE MOVED, MODIFIED, REMOVED MUST BE

PERFORMED BY A SECURITY CONTRACTOR TRAINED/CERTIFIED BY THE SYSTEM

MANUFACTURER TO PERFORM WORK ON THE NIH SECURITY SYSTEMS. ALSO, CONTACT

THE NIH DIVISION OF PHYSICAL SECURITY MANAGEMENT (DPS) TO COORDINATE WITH

THE APPROPRIATE SYSTEM OWNER TO ENSURE NECESSARY SYSTEM CONFIGURATION

MANAGEMENT ACTIONS ARE PERFORMED.

DEMOLITION

EAL EXHAUST AIR LOUVER

EAR EXHAUST AIR REGISTER

EAT ENTERING AIR TEMPERATURE

EC ELECTRICAL CONTRACTOR

ECON ECONOMIZER

EER ENERGY EFFICIENCY RATIO

EF EXHAUST FAN

EFF EFFICIENCY

ELEV ELEVATION

ELL ELBOW

ENT ENTERING

EQUIP EQUIPMENT

EQUIV EQUIVALENT

ESP EXTERNAL STATIC PRESSURE

EST ESTIMATED

ETR EXISTING TO REMAIN

EWH ELECTRIC WALL HEATER

EWT ENTERING WATER

EXH EXHAUST

°F DEGREES FAHRENHEIT

FC FLEXIBLE CONNECTION

FD FIRE DAMPER

FFE FINISHED FLOOR ELEVATION

FLA FULL LOAD AMP

FLEX FLEXIBLE

FLG FLANGE

FLR FLOOR

FM FACTORY MUTUAL

FPM FEET PER MINUTE

FT FEET

FT WG FEET OF WATER GAUGE

GA GAUGE

GAL GALLONS

GC GENERAL CONTRACTOR

GPM GALLONS PER MINUTE

H HEIGHT

HD HEAD

HP HORSEPOWER

HVAC HEATING, VENTILATION & AIR

HZ HERTZ

IN INCHES

INSUL INSULATE/INSULATION

IWG INCHES WATER GAUGE

KW KILOWATT

LAT LEAVING AIR TEMPERATURE

LB POUND

LBG LINEAR BAR GRILLE

EA EXHAUST AIR/EACH

13.

26.

27.

14.

RAG RETURN AIR GRILLE

RAR RETURN AIR REGISTER

REF REFER/REFERENCE

REG REGISTER

RF RETURN/RELIEF FAN

RLA RATED LOAD AMP

RLAD RETURN LINEAR AIR DIFFUSER

RM ROOM

RPC RECIRCULATING CHILLED WATER PUMP

RA RETURN AIR

LB/HR POUNDS PER HOUR

LRA LOCKED ROTOR AMP

LWT LEAVING WATER TEMPERATURE

RPH RECIRCULATING HOT WATER PUMP

RPM REVOLUTIONS PER MINUTE

SAR SUPPLY AIR REGISTER

SC SHADING COEFFICIENT

SD SMOKE DAMPER/SPLITTER DAMPER

SDC SOUND DIGITAL CONTROLLER

SEER SEASONAL ENERGY EFFICIENCY

SF SUPPLY FAN

SIM SIMILIAR

SLAD SLOT LINEAR AIR DIFFUSER

SMACNA SHEET METAL AND AIR

SO SCREENED OPENING

SP STATIC PRESSURE

SPEC SPECIFICATION

SQ FT SQUARE FEET

SQ IN SQUARE INCHES

SRV STEAM RELIEF VENT

SS STAINLESS STEEL

STL STEEL

STN SECTION

SUSP SUSPENSION

SWR SIDE WALL REGISTER

SYM SYMBOL

T THERMOSTAT

TCC TEMPERATURE CONTROL

TD TEMPERATURE DIFFERENCE

TEMP TEMPERATURE

TG TRANSFER GRILLE

TOS TOP OF STEEL

TOT TOTAL

SA SUPPLY AIR

SAG SUPPLY AIR GRILLE

TSP TOTAL STATIC PRESSURE

TV TURNING VANE

TXV THERMAL EXPANSION VALVE

TYP TYPICAL

U UNDERCUT

UG UNDERGROUND

UL UNDERWRITERS LABORATORY

UNOCC UNOCCUPIED

V VOLTS

VAV VARIABLE AIR VOLUME

VD VOLUME DAMPER

VDR VANED RETURN REGISTER

VFD VARIABLE FREQUENCY DRIVE

VOL VOLUME

VTR VENT THROUGH ROOF

W WATT

W/ WITH

WB WET BULB

WG WATER GAUGE

WPD WATER PRESSURE DROP

W/O WITHOUT

TP STEAM TRAP

MOISTURE SEPARATOR

STEAM TRAP ASSEMBLY

FP NOTES

CONSTRUCTION SITE MUST BE SEPARATED FROM SURROUNDING

AREAS IN ACCORDANCE WITH NFPA 241 SECTION 4.13.4 AND DFM

ADMINISTRATIVE INTERPRETATION 22-2.

DFM SHALL BE CONTACTED TO PERFORM WALL AND CEILING

CLOSE-INS AND FINAL OCCUPANCY INSPECTION.

T E

RM

A EDP

L A

TH

H

F E

S

O

NT

S

MA

N

HU

VICERE

USA

SHEET OF TOTAL SHEET

D R

A W

IN

G

T

IT

L E

S E

A L

MARK DESCRIPTIONDATE

P R

O J E

L E

A/E CON. NO.

A/E TASK NO.

PROPERTY OF THE US GOVERNMENT

FOR OFFICIAL USE ONLY

DO NOT REMOVE THIS NOTICE

PROPERLY DESTROY DOCUMENTS WHEN NO LONGER

NEEDED

OFFICE OF

RESEARCH FACILITIES

DRAWING NO.

D R

A W

IN

G

R E

V

IS

IO

N

S C

O N

T R

A C

T O

R S

B U

IL

D

IN

G

P R

O J E

C T

A /E

N a m e a n d

L O

G O

CONS. CONTR.

CONS. WORK

PRIME A/E

SUB A/E

CONSTR. CON.

FACILITY CODE

BUILDING NO.

NAME

STREET

CITY

STATE/ZIP

OTHER

BUILDING NO.

DESIGNED BY

DRAWN BY

CHECKED BY

FILE NAME

SPB TASK NO.

PROJ. OFFICER

PROJ. MGR.

SUBMISSION

SUB. DATE

WRK REQ. NO.

Salas O'Brien

BUILDING 4

NIH

9000 ROCKVILLE PIKE

BETHESDA

MARYLAND, 20892

75N99020D00010

75N99024F0002

N

IH

B U

IL

D

IN

G

R E

P L A

C E

A H

U s

A

N/A

C112354

KANIKA SHARMA

ANIL GIRI

FINAL SUBMISSION

05/13/2026

C112354

S T

R U

C T

U R

A L

E N

G

IN

E E

R

M E

C H

A N

IC

A

L C

O V

E R

S H

E E

T

M001

ID

CC

AG

MECHANICAL COVER SHEET

DRAWING LIST - MECHANICAL

DRAWING

NUMBER

DRAWING TITLE

M001 MECHANICAL COVER SHEET

MD101 LEVEL B2 DEMOLITION HVAC PLAN

M101 LEVEL B2 HVAC PLAN

M201 MECHANICAL SECTIONS

M301 MECHANICAL SCHEDULES

M501 MECHANICAL DETAILS

M601 MECHANICAL CONTROLS

1 05/13/25 35% CD SUBMISSION

2 07/15/25 65% CD SUBMISSION

14 15 17 18 19

E

C

B8

(E) 30ø SA

(E ø

S A

(E ø

S A

(E) 14ø SA

(E) 18ø SA

(E) 20ø SA

(E) 24ø SA

(E) 24ø SA 24x18 OA

VIVARIUM

B235 OFFICE

B241

MECH

B2-37 (E) SA

28x12 SA

(E) HWS/R

& CHWS/R

AHU-3

(E) SA

(E) DUCT MOUNTED

HUMIDIFIER

P-3

9 10 11 12 13 14 1510.8

B

A

(E) 18ø SA

20x12 SA

VIVARIUM

B234

LAB

B228B

LAB

B228A

LAB

B224

LAB

HWS/R

CHWS/R

(E) 20ø SA

(E) 20ø SA

(E) 22ø SA

12x24 OA (E) LPR

(E) HWS/R

AHU-4 &

AHU-4A

(E) CHWS/R

MECH

B2-42

(E)12x24 OA

P-4

P-4A

(E) LPS

SCALE: 1/4"=1'-0"

0' 4'2' 8'

T E

RM

A EDP

L A

TH

H

F E

S

O

NT

S

MA

N

HU

VICERE

USA

SHEET OF TOTAL SHEET

D R

A W

IN

G

T

IT

L E

S E

A L

MARK DESCRIPTIONDATE

P R

O J E

L E

A/E CON. NO.

A/E TASK NO.

PROPERTY OF THE US GOVERNMENT

FOR OFFICIAL USE ONLY

DO NOT REMOVE THIS NOTICE

PROPERLY DESTROY DOCUMENTS WHEN NO LONGER

NEEDED

OFFICE OF

RESEARCH FACILITIES

DRAWING NO.

D R

A W

IN

G

R E

V

IS

IO

N

S C

O N

T R

A C

T O

R S

B U

IL

D

IN

G

P R

O J E

C T

A /E

N a m e a

G O

CONS. CONTR.

CONS. WORK

PRIME A/E

SUB A/E

CONSTR. CON.

FACILITY CODE

BUILDING NO.

NAME

STREET

CITY

STATE/ZIP

OTHER

BUILDING NO.

DESIGNED BY

DRAWN BY

CHECKED BY

FILE NAME

SPB TASK NO.

PROJ. OFFICER

PROJ. MGR.

SUBMISSION

SUB. DATE

WRK REQ. NO.

Salas O'Brien

BUILDING 4

NIH

9000 ROCKVILLE PIKE

BETHESDA

MARYLAND, 20892

75N99020D00010

75N99024F0002

N

IH

B U

IL

D

IN

G

R E

P L A

C E

A H

U s

A

N/A

C112354

KANIKA SHARMA

ANIL GIRI

FINAL SUBMISSION

05/13/2026

C112354

KEYPLAN

Scope of Work

S T

R U

C T

U R

A L

E N

G

IN

E E

R

L E

V E

L B

D

E M

O L

IT

IO

N

H V

A C

P L A

N

MD101

ID

CC

AG

LEVEL B2 DEMOLITION HVAC

PLAN

GENERAL NOTES

1. REFER TO M001 FOR GENERAL NOTES, SYMBOL LEGEND, AND

LIST OF ABBREVIATIONS.

2. REFER TO TYPICAL DETAILS FOR DUCTWORK, PIPING, AND

EQUIPMENT INSTALLATION.

3. ALL EQUIPMENT SHALL BE INSTALLED AT A MINIMUM 10'-0" FROM

ROOF EDGES.

4. AHU-4A SHALL BE REPLACED WHILE AHU-4B CONTINUES TO

SERVE THE SPACE. THE CONTRACTOR SHALL ENSURE

CONTINUOUS OPERATION CAN BE MAINTAINED THROUGH THE

USE OF ISOLATION DAMPERS AND VALVES.

1/4" = 1'-0"MD101

1 B2 FLOOR DEMOLTIION HVAC PLAN - ENLARGED 1

1/4" = 1'-0"MD101

2 B2 FLOOR DEMOLTIION HVAC PLAN - ENLARGED 2

KEYNOTES

1 DEMOLISH THE DUCT MOUNTED STEAM HUMIDIFIER, WITH

ASSOCIATED PIPING, LPS/R PIPING WITH STEAM TRAP,

CONDENSATE PIPING, SUPPORTS, AND APPURTENANCES.

PREPARE THE LPS AND LPR FOR THE NEW CONNECTION TO

AHU-4A AND AHU-4B. CAP THE CONDENSATE PIPE AT THE WALL

PENETRATION.

2 DEMOLISH AHU WITH ASSOCIATED DUCTWORK, PIPING,

RECIRCULATING PUMP(S), CONTROLS, APPURTENANCES,

CONCRETE PAD, AND SUPPORTS. PREPARE DUCTWORK AND

PIPING FOR CONNECTION TO THE NEW AHU.

3 CONTRACTOR TO PROVIDE NEW ISOLATION VALVES UPSTREAM OF

THE TIES POINT FOR CHWS/R AND HWS/R.

1 05/13/25 35% CD SUBMISSION

2 07/15/25 65% CD SUBMISSION

14 15 17 18 19

C

B8

(E) 30ø SA

(E ø

S A

(E ø

S A

(E) 18ø SA

(E) 20ø SA

(E) 24ø SA

VIVARIUM

B235

OFFICE

B241

(E) 14ø SA(E) 24ø SA

MECH

B2-37

(E)24x18 OA

24x18 OA

1" HWS/R

(E) SA

DDC PANEL

AHU-3

M201

(E) HWS/R

& CHWS/R

AHU-3

2" CHWS/R

(E) DUCT MOUNTED

HUMIDIFIER

28x12 SA

(E) 12x6 SA

RPC-3RPH-3

SD

9 10 11 12 13 14 1510.8

B

A

(E) 20ø SA(E) 18ø SA

(E) 22ø SA

(E) 20ø SA

MECH

B2-42

1 1/2" CHWS/R

M201

(E) CHWS/R 1" HWS/R

1" HWS/R

(E)12x24 OA

1 1/2" CHWS/R

(E) HWS/R

DDC PANEL

AHU-4B

DDC PANEL

AHU-4A

20x12 SA

20x12 SA

22x10 SA

(E)18x12 SA

14x22 OA 12x24 OA

VIVARIUM

B234

LAB

B228B

LAB

B228A

LAB

B224

LAB

AHU-4B

AHU-4A

RPH-4A

RPH-4B

RPC-4B

RPC-4A

(E) LPR(E) LPS

3/4" LPS/R

3/4" LPS/R

SCALE: 1/4"=1'-0"

0' 4'2' 8'

T E

RM

A EDP

L A

TH

H

F E

S

O

NT

S

MA

N

HU

VICERE

USA

SHEET OF TOTAL SHEET

D R

A W

IN

G

T

IT

L E

S E

A L

MARK DESCRIPTIONDATE

P R

O J E

L E

A/E CON. NO.

A/E TASK NO.

PROPERTY OF THE US GOVERNMENT

FOR OFFICIAL USE ONLY

DO NOT REMOVE THIS NOTICE

PROPERLY DESTROY DOCUMENTS WHEN NO LONGER

NEEDED

OFFICE OF

RESEARCH FACILITIES

DRAWING NO.

D R

A W

IN

G

R E

V

IS

IO

N

S C

O N

T R

A C

T O

R S

B U

IL

D

IN

G

P R

O J E

C T

A /E

N a m e a

G O

CONS. CONTR.

CONS. WORK

PRIME A/E

SUB A/E

CONSTR. CON.

FACILITY CODE

BUILDING NO.

NAME

STREET

CITY

STATE/ZIP

OTHER

BUILDING NO.

DESIGNED BY

DRAWN BY

CHECKED BY

FILE NAME

SPB TASK NO.

PROJ. OFFICER

PROJ. MGR.

SUBMISSION

SUB. DATE

WRK REQ. NO.

Salas O'Brien

BUILDING 4

NIH

9000 ROCKVILLE PIKE

BETHESDA

MARYLAND, 20892

75N99020D00010

75N99024F0002

N

IH

B U

IL

D

IN

G

R E

P L A

C E

A H

U s

A

N/A

C112354

KANIKA SHARMA

ANIL GIRI

FINAL SUBMISSION

05/13/2026

C112354

KEYPLAN

Scope of Work

S T

R U

C T

U R

A L

E N

G

IN

E E

R

L E

V E

L B

H

V A

C P

L A

N

M101

ID

CC

AG

LEVEL B2 HVAC PLAN

GENERAL NOTES

1. REFER TO M001 FOR GENERAL NOTES, SYMBOL LEGEND, AND

LIST OF ABBREVIATIONS.

2. REFER TO TYPICAL DETAILS FOR DUCTWORK, PIPING, AND

EQUIPMENT INSTALLATION.

3. ALL EQUIPMENT SHALL BE INSTALLED AT A MINIMUM 10'-0" FROM

ROOF EDGES.

4. AHU-4A SHALL BE REPLACED WHILE AHU-4B CONTINUES TO

SERVE THE SPACE. THE CONTRACTOR SHALL ENSURE

CONTINUOUS OPERATION CAN BE MAINTAINED THROUGH THE

USE OF ISOLATION DAMPERS AND VALVES.

1/4" = 1'-0"M101

1 B2 FLOOR HVAC PLAN - ENLARGED 1

1/4" = 1'-0"M101

2 B2 FLOOR HVAC PLAN - ENLARGED 2

1 05/13/25 35% CD SUBMISSION

2 07/15/25 65% CD SUBMISSION

3 10/30/25 100% CD SUBMISSION

4 05/13/26 FINAL SUBMISSION

KEYNOTES

1 INSTALL AHU ON NEW 4" THICK CONCRETE PAD. EXTEND THE

CONCRETE PAD 6" BEYOND THE FOOTPRINT OF EACH AHU. SEE

S101 FOR MORE DETAIL.

2 SEE M501, DETAIL #1 FOR PIPING CONNECTION.

3 SEE M501, DETAIL #4 FOR PIPING CONNECTION.

4 SEE M501, DETAIL #6 FOR PIPING CONNECTION.

5 CONTRACTOR TO PROVIDE NEW ISOLATION VALVES UPSTREAM OF

THE TIES POINT FOR CHWS/R AND HWS/R.

B1 LEVEL

-11' - 0"

B2 LEVEL

-22' - 0"

B2 Utility Stair -20' - 5 3/32"

1517 16

AHU-3

(E) 24ø SA

(E) 20ø SA

(E) 30ø SA(E) 14ø SA

24x18 OA

(E) HWS/R

& CHWS/R

12x28 SA

(E)12x28 SA

(E) 6x12 SA

B1 LEVEL

-11' - 0"

B2 LEVEL

-22' - 0"

B2 Utility Stair -20' - 5 3/32"

10 11 12 13 14 1510.8

(E) 22ø SA

(E) 20ø SA

22x14 OA 24x12 OA

12x20 SA 20x12 SA

22x10 SA

(E) CHWS

1" HWS

AHU-4B AHU-4A

1" HWS

3/4" LPS

SCALE: 1/4"=1'-0"

0' 4'2' 8'

T E

RM

A EDP

L A

TH

H

F E

S

O

NT

S

MA

N

HU

VICERE

USA

SHEET OF TOTAL SHEET

D R

A W

IN

G

T

IT

L E

S E

A L

MARK DESCRIPTIONDATE

P R

O J E

L E

A/E CON. NO.

A/E TASK NO.

PROPERTY OF THE US GOVERNMENT

FOR OFFICIAL USE ONLY

DO NOT REMOVE THIS NOTICE

PROPERLY DESTROY DOCUMENTS WHEN NO LONGER

NEEDED

OFFICE OF

RESEARCH FACILITIES

DRAWING NO.

D R

A W

IN

G

R E

V

IS

IO

N

S C

O N

T R

A C

T O

R S

B U

IL

D

IN

G

P R

O J E

C T

A /E

N a m e a

G O

CONS. CONTR.

CONS. WORK

PRIME A/E

SUB A/E

CONSTR. CON.

FACILITY CODE

BUILDING NO.

NAME

STREET

CITY

STATE/ZIP

OTHER

BUILDING NO.

DESIGNED BY

DRAWN BY

CHECKED BY

FILE NAME

SPB TASK NO.

PROJ. OFFICER

PROJ. MGR.

SUBMISSION

SUB. DATE

WRK REQ. NO.

Salas O'Brien

BUILDING 4

NIH

9000 ROCKVILLE PIKE

BETHESDA

MARYLAND, 20892

75N99020D00010

75N99024F0002

N

IH

B U

IL

D

IN

G

R E

P L A

C E

A H

U s

A

N/A

C112354

KANIKA SHARMA

ANIL GIRI

FINAL SUBMISSION

05/13/2026

C112354

KEYPLAN

Scope of Work

S T

R U

C T

U R

A L

E N

G

IN

E E

R

M E

C H

A N

IC

A

L S

E C

T

IO

N S

M201

ID

CC

AG

MECHANICAL SECTIONS

1/4" = 1'-0"M201

1 AHU-3 Section

1/4" = 1'-0"M201

2 AHU-4A & AHU-4B Section

1 05/13/25 35% CD SUBMISSION

2 07/15/25 65% CD SUBMISSION

NOTES:

1. PROVIDE AHU-3 WITH 2 FANS ARRANGED AS FAN ARRAY WITH ONE FAN AS REDUNDANT.

2. AHUs ARE TO BE CONNECTED TO EMERGENCY POWER.

3. HWS/R IS PROVIDED WITH 40% GLYCOL.

4. PROVIDE FOR STEAM HUMIDIFIER MODULATE VALVE BRONZE INSIDE SS TRIM, STEAM TRAP, AND STRAINER CAST IRON.

NOTES:

1. PRIMED WITH 1/2" WATER LINE.

2. PROVIDE WITH CAST IRON BODY AND COVER SUITABLE TO 175 PSI, SS INTERNALS WITH HARDENED VALVE AND SEAT.

3. INSTALL PER MANUFACTURER RECOMMENDATIONS AND SITE CONDITIONS AFTER DEMOLITION OF OLD DUCT MOUNTED HUMIDIFIER.

4. PROVIDE WITH CAST IRON BODY AND SS BUCKET, LEVER ASSEMBLY, AND STRAINER.

T E

RM

A EDP

L A

TH

H

F E

S

O

NT

S

MA

N

HU

VICERE

USA

SHEET OF TOTAL SHEET

D R

A W

IN

G

T

IT

L E

S E

A L

MARK DESCRIPTIONDATE

P R

O J E

L E

A/E CON. NO.

A/E TASK NO.

PROPERTY OF THE US GOVERNMENT

FOR OFFICIAL USE ONLY

DO NOT REMOVE THIS NOTICE

PROPERLY DESTROY DOCUMENTS WHEN NO LONGER

NEEDED

OFFICE OF

RESEARCH FACILITIES

DRAWING NO.

D R

A W

IN

G

R E

V

IS

IO

N

S C

O N

T R

A C

T O

R S

B U

IL

D

IN

G

P R

O J E

C T

A /E

N a m e a

G O

CONS. CONTR.

CONS. WORK

PRIME A/E

SUB A/E

CONSTR. CON.

FACILITY CODE

BUILDING NO.

NAME

STREET

CITY

STATE/ZIP

OTHER

BUILDING NO.

DESIGNED BY

DRAWN BY

CHECKED BY

FILE NAME

SPB TASK NO.

PROJ. OFFICER

PROJ. MGR.

SUBMISSION

SUB. DATE

WRK REQ. NO.

Salas O'Brien

BUILDING 4

NIH

9000 ROCKVILLE PIKE

BETHESDA

MARYLAND, 20892

75N99020D00010

75N99024F0002

N

IH

B U

IL

D

IN

G

R E

P L A

C E

A H

U s

A

N/A

C112354

KANIKA SHARMA

ANIL GIRI

FINAL SUBMISSION

05/13/2026

C112354

S T

R U

C T

U R

A L

E N

G

IN

E E

R

M E

C H

A N

IC

A

L S

C H

E D

U L E

S

M301

ID

CC

AG

MECHANICAL SCHEDULES

AIR HANDLING UNIT SCHEDULE

ID SERVICE LOCATION

FAN DATA CHILLED WATER COOLING COIL HOT WATER PREHEAT COIL STEAM HUMIDIFIER AIR FILTER DATA

WEIGHT

(LBS) BASIS OF DESIGN REMARKS

CFM

(TOTAL OA)

EXT. S.P.

(IN W.G.)

TOTAL S.P.

(IN W.G.)

FACE

VELOCITY

(FPM)

MOTOR

HP V/PH

TOTAL

(MBH)

MAX FACE

VELOCITY

(FPM)

AIR DATA CHILLED WATER DATA

TOTAL

MBH

MAX FACE

VELOCITY

(FPM)

AIR DATA HEATING HW DATA ENTERING

CONDITIONS

DB (°F) / %RH

LEAVING

CONDITIONS

DB (°F) / %RH

NON-WETTING

DISTANCE

(IN)

STEAM

LOAD

(LBS/HR)

VALVE

SIZE / Cv

(IN)

STEAM

PRESSURE

(PSI)

PRE

FILTER

(MERV)

FINAL

FILTER

(MERV)

EAT (°F) LAT (°F) MAX APD

(IN W.G.) GPM

EWT

(°F)

LWT

(°F)

MAX WPD

(FT W.G.)

EAT

(°F)

LAT

(°F)

MAX APD

(IN W.G.) GPM

EWT

(°F)

LWT

(°F)

MAX WPD

(FT W.G.)DB WB DB WB

AHU-3 CAGEWASH & PROCEDURE ROOM MECH B219A 3300 1.10 4.0 1000 5 480/3 281 452 95 78.3 53.77 53.77 1.03 37.4 45 60 8.95 167 452 11 57.72 0.08 18.0 200 180 4.97 - / - - / - - - - - 8 14 2593 INGENIA 1, 2, 3

AHU-4A ANIMAL HOLDING ROOMS MECH B200 1650 1.10 4.0 1100 3 480/3 138 495 95 78.3 54.29 54.29 1.20 18.4 45 60 14.89 82 495 11 57.24 0.10 8.9 200 180 1.75 56.6 / 10% 60 / 75.5% 11 53.65 0.5 / 2.9 5 8 14 2000 INGENIA 2, 3, 4

AHU-4B ANIMAL HOLDING ROOMS MECH B200 1650 1.10 4.0 1100 3 480/3 138 495 95 78.3 54.29 54.29 1.20 18.4 45 60 14.89 82 495 11 57.24 0.10 8.9 200 180 1.75 56.6 / 10% 60 / 75.5% 11 53.65 0.5 / 2.9 5 8 14 2000 INGENIA 2, 3, 4

RECIRCULATING PUMP SCHEDULE

ID SERVICE TYPE GPM

TOTAL HEAD

(FT)

FLUID TEMP

(°F)

ELECTRICAL DATA

EFFICIENCY

BASIS OF DESIGN

(BELL & GOSSETT) REMARKSHP RPM V/PH

RPC-3 AHU-3 CHILLED WATER 15 25 68 1/6 3300 120/1 35 PL-36 -

RPC-4A AHU-4A CHILLED WATER 10 15 68 1/12 2650 120/1 21 PL-30 -

RPC-4B AHU-4B CHILLED WATER 10 15 68 1/12 2650 120/1 21 PL-30 -

RPH-3 AHU-3 HOT WATER 10 18 180 1/8 4600 120/1 22 NBF-36 -

RPH-4A AHU-4A HOT WATER 8 8 180 1/3 2940 120/1 16 NRF-22 -

RPH-4B AHU-4B HOT WATER 8 8 180 1/3 2940 120/1 16 NRF-22 -

STEAM TRAP SCHEDULE

ID SERVICE SYSTEM

MINIMUM

INLET

PRESSURE

(PSIG)

TRAP

CAPACITY AT

DIFFERENTIAL

PRESSURE

(LBS/HR)

CONDENSATE

LOAD WITH

SAFETY FATOR

(LBS/HR)

TRAP SEAT

RATING

(PSI) TYPE

BODY SIZE

(IN)

BASIS OF DESIGN

(HOFFMAN SPECIALTY) REMARKS

TP1-4A AHU-4A LPR 5 500 84 15 F & T 3/4 FT015H 2, 3

TP2-4A AHU-4A LPR 5 - - 20 BUCKET 1/2 & 3/4 B0020S-2 1, 3, 4

TP3-4B AHU-4B LPR 5 500 84 15 F & T 3/4 FT015H 2, 3

TP4-4B AHU-4B LPR 5 - - 20 BUCKET 1/2 & 3/4 B0020S-2 1, 3, 4

1 05/13/25 35% CD SUBMISSION

2 07/15/25 65% CD SUBMISSION

CHILLED WATER COIL PIPING CONNECTION DETAIL

SCALE: NOT TO SCALE

STRAINER

PRESS. GAUGE (TYP.)

UNION (TYP.)

AIR FLOW

REDUCING TEES

COOLING COIL

GATE VALVE

VENT FROM COIL

WATER SUPPLY IN

WATER RETURN OUT

COMBINATION FLOW METERING

CALIBRATED

BALANCING VALVE AND POSITIVE SHUT-OFF

VALVE

FLEXIBLE

CONNECTIONS

THERMOMETER

HOSE END

DRAIN

VALVE

NOTE:

1. CONNECTION OF DISSIMILAR METALS SHALL BE DONE THRU DIELECTRIC UNIONS.

2. LOCATE TILT THERMOMETER DIAL FOR EASE OF READING. PROVIDE ADJUSTABLE ANGLE AS REQUIRED.

HOSE END DRAIN VALVE

REDUCING ELBOWS AIR FLOW

RECIRCULATING

PUMP (RPC- )

PIPE

LOCKING NUT

SUPPORT NUT

HANGER ROD

HEAVY DUTY

CLEVIS HANGER

VAPOR

BARRIER INSULATION

16 GAGE ZINC

COATED SHEET

STEEL SADDLE AT

LEAST 12" LONG

CLEVIS PIPE HANGER DETAIL

SCALE: NOT TO SCALE

WATER PIPING STEAM PIPING

6" MIN.

PRESSURE GAUGE

REDUCING BUSHING

PRESSURE SNUBBER

BALL VALVE

THREADOLET

WATER PIPE

STEAM PIPE

WELDOLET

REDUCING BUSHING

COIL SYPHON

BALL VALVE

PRESSURE GAUGE

PRESSURE GAUGE DETAIL

SCALE: NOT TO SCALE

NOTE:

1. FOR PIPES 1/2" AND SMALLER, USE FITTING INSTEAD OF THREADOLET OR WELDOLET.

OPEN

H3

H1

H2

AHU DRAIN PAN

TURN DOWN INTO

DRAIN

COPPER DWV

DRAIN PIPING (TYP.)

H1 = EQUAL NEGATIVE STATIC

PRESSURE AT PAN

H2 = EQUAL TO H1

H3 = EQUAL TO 1"

PLUGGED TEES IF

PVC USED

DRAW-THROUGH UNIT DRAIN DETAIL

SCALE: NOT TO SCALE

AIR HANDLING UNIT (AHU-3) DETAIL

SCALE: NOT TO SCALE

PLAN VIEW

FRONT VIEW

A B C D E

A B C D E

ACCESS SECTIONA

SIDE LOADING FILTER SECTIONB

HEATING COIL SECTION - PROPYLENE GLYCOLC

CHILLED WATER COIL SECTION

SUPPLY FAN SECTION

D

E

AIR HANDLING UNITS (AHU-4A & AHU-4B) DETAIL

SCALE: NOT TO SCALE

ACCESS SECTION

PLAN VIEW

FRONT VIEW

A

SIDE LOADING FILTER SECTIONB

HEATING COIL SECTION - PROPYLENE GLYCOLC

ACCESS SECTION

SPACER SECTION

CHILLED WATER COIL SECTION

E

HUMIDIFIER SECTIOND SUPPLY FAN SECTIONH

G

F

H

A

G

B DC

F E

AHU HUMIDIFIER PIPING DIAGRAM

SCALE: NOT TO SCALE

HEADER

GASKETED

ESCUTCHEON

AHU

UNION (TYP)

BUCKET TRAP

LPS

BALL VALVE (TYP)

FULL SIZE DIRT LEG LPR

LPR

HUMIDIFIER MANIFOLD

(TYP)

FOR ACTUAL NUMBER OF

MANIFOLDS SEE SCHEDULE

CONTROL VALVE

6" MIN

AUTO ISOLATION VALVE

CHECK VALVE

(TYP)

STRAINER

NOTES:

1. WHEN COIL IS INCLUDED IN CASING MOUNTED ON VIBRATION ISOLATOR UNITS, THE RUNOUT PIPING FOR CONNECTIONS TO COIL SHALL BE INSTALLED WITH

SWING JOINTS TO ALLOW FOR THE VIBRATION.

2. PIPING SHALL BE INSTALLED IN SUCH MANNER THAT IT WILL NOT BLOCK THE SWING OR USE OF ACCESS DOORS OR PANELS. NEITHER SHALL IT BLOCK THE

SERVICING OF FILTERS, VALVES, OR EQUIPMENT.

3. WHERE THE DISTANCE FROM THE INTAKE OF TRAP TO BOTTOM OF COIL IS RESTRICTED, FLOAT AND THERMOSTATIC TRAP CAPACITIES SHALL BE

SELECTED ON A LOWER PRESSURE DROP SUITED TO THE DISTANCE BETWEEN BOTTOM OF COIL AND TRAP INLET.

BUCKET TRAP

TP2-4A

TP4-4B

TP1-4A

TP3-4B

HOT WATER COIL PIPING CONNECTION DETAIL

SCALE: NOT TO SCALE

STRAINER

PRESS. GAUGE (TYP.)

UNION (TYP.)

AIR FLOW

REDUCING TEES

HEATING COIL

GATE VALVE

VENT FROM COIL

WATER SUPPLY IN

WATER RETURN OUT

COMBINATION FLOW METERING

CALIBRATED

BALANCING VALVE AND POSITIVE SHUT-OFF

VALVE

FLEXIBLE

CONNECTIONS

THERMOMETER

HOSE END

DRAIN

VALVE

2-WAY CONTROL VALVE, UNION TYPE, ONE PIPE

SIZE SMALLER THAN RUNOUT SIZE. SEE NOTE 1.

NOTE:

1. CONNECTION OF DISSIMILAR METALS SHALL BE DONE THRU DIELECTRIC UNIONS.

2. LOCATE TILT THERMOMETER DIAL FOR EASE OF READING. PROVIDE ADJUSTABLE ANGLE AS REQUIRED.

HOSE END DRAIN VALVE

REDUCING ELBOWS AIR FLOW

RECIRCULATING

PUMP (RPH- )

STANDARD BRANCH TAKEOFF

CFM3 = LESS THAN 30% OF CFM1

TF = TRANSITION, FLAT ON TOP

SEE SMACNA FIG. 2-8 AND 2-9

WHEN REQ'D.

(SEE PLANS)

CFM2

TRANSITION

TF

CFM3

45°

(NO CHANGE IN DUCT HEIGHT)

UNEQUAL HORIZONTAL SPLIT1

STANDARD ELBOWS

SPECIAL BRANCH TAKEOFF

W2 = (CFM2/CFM1) x W1

W3 = REQUIRED DUCT WIDTH

CFM3 = 30% OR MORE OF CFM1

(NO CHANGE IN DUCT HEIGHT)

SEE SMACNA FIG. 2-7

CFM1

CFM1

W1 6"R

TRANSITION ELL

TFW2

CFM2

W3

CFM3

STANDARD ELBOW

SEE SMACNA FIG. 2-2

TF = TRANSITION, FLAT ON TOP

3"

3"

SINGLE VANES WITH

TRAILING EDGE; SEE

SMACNA FIG. 2-3

EQUAL HORIZONTAL SPLIT

W2 = W1 x 0.6

ES = EQUAL SPLIT

W1

W2

ES

W2

EQUAL/UNEQUAL VERTICAL SPLIT

TOP SPLIT = CFM2/CFM1 (DUCT HT. = W1)

TRANSITION

CFM1

W2 = W1

W1

W2

TF

W2

CFM2

MANUAL VOLUME

DAMPER, TYPICAL

W

R

1/3W

1/3W

2/3W

VANE

VANE

1/2W

1/6W R

R

R SHALL EQUAL OR

BE GREATER THAN

W.

R SHALL EQUAL OR

BE GREATER THAN

1/6W.

R SHALL EQUAL OR

BE GREATER THAN

1/3W.

W

W

SHORT RADIUS ELBOW WITH ONE VANE7

SHORT RADIUS ELBOW WITH TWO VANES8

DUCT BRANCH FITTING DETAIL

SCALE: NOT TO SCALE

NOTES:

1. REFER TO PLANS FOR SPECIFIC FITTING TYPES.

2. FOR CLARITY, VOLUME DAMPERS ARE NOT INDICATED ON FLOOR PLANS. PROVIDE FOR ALL INSTANCES INDICATED HERE AND AS

RECOMMENDED BY CURRENT SMACNA DUCT CONSTRUCTION GUIDELINES.

3. CONTRACTOR TO ENSURE RADIUS ELBOWS SHALL NOT BE SUBSTITUTED WITH 90-DEGREE RECTANGULAR ELBOW WITH VANES. OBTAIN ENGINEERS REVIEW AND APPROVAL IF SPACE LIMITATIONS PRECLUDE RADIUS ELBOWS AS SHOWN ON CONTRACT DRAWINGS PRIOR TO PURCHASE, FABRICATION, AND INSTALLATION. ALL ATTEMPTS SHALL BE MADE TO USE RADIUS ELBOWS IN LIEU OF 90 DEGREE RECTANGULAR.

T E

RM

A EDP

L A

TH

H

F E

S

O

NT

S

MA

N

HU

VICERE

USA

SHEET OF TOTAL SHEET

D R

A W

IN

G

T

IT

L E

S E

A L

MARK DESCRIPTIONDATE

P R

O J E

L E

A/E CON. NO.

A/E TASK NO.

PROPERTY OF THE US GOVERNMENT

FOR OFFICIAL USE ONLY

DO NOT REMOVE THIS NOTICE

PROPERLY DESTROY DOCUMENTS WHEN NO LONGER

NEEDED

OFFICE OF

RESEARCH FACILITIES

DRAWING NO.

D R

A W

IN

G

R E

V

IS

IO

N

S C

O N

T R

A C

T O

R S

B U

IL

D

IN

G

P R

O J E

C T

A /E

N a m e a

G O

CONS. CONTR.

CONS. WORK

PRIME A/E

SUB A/E

CONSTR. CON.

FACILITY CODE

BUILDING NO.

NAME

STREET

CITY

STATE/ZIP

OTHER

BUILDING NO.

DESIGNED BY

DRAWN BY

CHECKED BY

FILE NAME

SPB TASK NO.

PROJ. OFFICER

PROJ. MGR.

SUBMISSION

SUB. DATE

WRK REQ. NO.

Salas O'Brien

BUILDING 4

NIH

9000 ROCKVILLE PIKE

BETHESDA

MARYLAND, 20892

75N99020D00010

75N99024F0002

N

IH

B U

IL

D

IN

G

R E

P L A

C E

A H

U s

A

N/A

C112354

KANIKA SHARMA

ANIL GIRI

FINAL SUBMISSION

05/13/2026

C112354

S T

R U

C T

U R

A L

E N

G

IN

E E

R

M E

C H

A N

IC

A

L D

E T

A

IL

S

M501

ID

CC

AG

MECHANICAL DETAILS

1 05/13/25 35% CD SUBMISSION

2 07/15/25 65% CD SUBMISSION

SCALE: NOT TO SCALE

AIR HANDLING UNIT AHU-3, AHU-4A, AND AHU-4B CONTROL DIAGRAM

GENERAL NOTES:

1. THE BAS SHALL BE SIEMENS TECHNOLOGIES, INSTALLED USING THE LATEST SOFTWARE.

THE BAS SHALL BE NETWORKED TO THE NIH CAMPUS SERVER USING A LAN CONNECTION

TO THE EXISTING MBC IN THE BUILDING. GRAPHICS SHALL BE ADDED TO THE CURRENT

SIEMENS APOGEE WORKSTATION IN BUILDING 4 ROOM B3-17 (ENGINEERS OFFICE). THE

BAS SHALL BE SET UP TO ALARM VARIOUS APOGEE WORKSTATIONS AS DIRECTED BY

BUILDING MAINTENANCE TEAM. CONTRACTOR SHALL SET UP THE INFORMATION

MANAGER IN THE ANIMAL FACILITY, TICKET GENERATION TO THE CCMS USING RENO AND

THE SIEMENS ALARM MANAGEMENT SYSTEM.

2. AUTOMATIC CONTROLS SHALL BE ELECTRONIC.

3. TRANSFORMERS FOR THE RPC'S SHALL BE CAMPUS STANDARD.

4. PROVIDE AUTOMATIC CONTROLS FOR AHU-3 AND AHU-4 PER SEQUENCE OF OPERATIONS.

5. INDICATED CONTROL DIAGRAM INCLUDES ALL POINTS REQUIRED BY THE DDC SYSTEM

FOR CONTROL OF THE UNIT. THE ATC CONTRACTOR SHALL PROVIDE ADDITIONAL POINTS

AS REQUIRED FOR A COMPLETE AND FULLY OPERATIONAL SYSTEM IN ACCORDANCE

WITH THE SEQUENCE OF OPERATIONS AND MANUFACTURER RECOMMENDATIONS.

SEQUENCE OF OPERATIONS

GENERAL:

UNIT DDC CONTROLLER SHALL INTERFACE WITH THE NIH CAMPUS SIEMENS BMS VIA THE

FRONT END SYSTEM THROUGH A WEB-BASED USER INTERFACE. PROVIDE AND COORDINATE

WITH NIH CIT FOR NETWORK CONTROL WIRING/CABLING DATA DROPS AND ROUTING AND

SHALL BE INSTALLED AT THE DDC PANEL FROM THE NEAREST TELECOM ROOM VIA A NAE. UNIT

DDC CONTROLLER SHALL PROVIDE READ/WRITE, ALARM ANNUNCIATION, AND USER

ADJUSTABLE SETPOINTS THROUGH THE NIH CAMPUS BMS FRONT END SYSTEM.

THE AIR HANDLING UNIT SHALL BE FULLY CONTROLLED BY THE BAS. THE AIR HANDLING UNIT

CONTROL STRATEGIES INCLUDE 24-HOUR A DAY, 7 DAYS A WEEK OPERATION, STATIC

PRESSURE CONTROL, PREHEAT, AND COOLING COIL VALVE CONTROL, AND APPROPRIATE

SAFETIES AS SPECIFIED BELOW.

THE AIR HANDLING UNIT AHU-4B SERVES AS A FULL BACKUP TO AHU-4A. ALL CONTROL

ELEMENTS FOR AHU-4B, INCLUDING ISOLATION DAMPERS, SHALL REMAIN NORMALLY CLOSED.

UPON DE-ENERGIZATION OF AHU-4A, AHU-4B SHALL BE FULLY ENERGIZED. AT THAT TIME, THE

ISOLATION DAMPERS AND CONTROL VALVES FOR AHU-4A SHALL CLOSE, WHILE THE ISOLATION

DAMPERS AND CONTROL VALVES FOR AHU-4B SHALL MODULATE TO THE OPEN POSITION. THE

BAS SHALL ROTATE THE OPERATION OF AHU-4A AND AHU-4B ON A MONTHLY BASIS

(ADJUSTABLE). IF THE OPERATING AHU FAILS, AN ALARM SHALL BE ANNUNCIATED TO BAS.

PROVIDE WITH HOA SWITCH. IN HAND POSITION THE FAN SHALL RUN UNLESS A SAFETY DEVICE

TRIPS. PROVIDE CONTROL TO DAMPER TO BE OPEN. IN THE OFF POSITION, THE FAN SHALL

STOP AND THE DAMPERS SHUT.

SUPPLY FAN:

THE SUPPLY FANS SHALL BE STARTED BY ISSUING A START COMMAND FROM THE EMCS. THE

FAN OPERATION SHALL BE CONTINUOUS. THE 100% OUTSIDE AIR DAMPER SHALL OPEN AND

AFTER BEING PROVEN OPEN BY THE END SWITCH, THE SUPPLY FAN SHALL START. THE EMCS

SHALL PROVE FAN OPERATION OF THE SUPPLY FAN AND USE THE STATUS INDICATION TO

ACCUMULATE RUN TIME.

PREHEAT COIL VALVE:

THE PREHEAT COIL CONTROL VALVE SHALL MODULATE TO MAINTAIN TEMPERATURE SET POINT

TO 57.72°F (ADJUSTABLE) FOR AHU-3 AND 57.24°F (ADJUSTABLE) FOR AHU-4A AND AHU-4B.

THE EXISTING TO REMAIN HEATING COIL CIRCULATING PUMP, SHALL ENERGIZE WHENEVER OA

TEMPERATURE IS BELOW 50°F (ADJUSTABLE) OR A DEMAND FOR HEAT IS REQUIRED. DE-

ENERGIZE ABOVE 55°F (ADJUSTABLE) AND NO DEMAND FOR HEAT. THE PREHEAT VALVE SHALL

NEVER BE OPENED CONCURRENTLY WITH THE COOLING COIL VALVE. PROVIDE DEDICATED

ANALOG OUTPUT FOR THE PREHEAT VALVE AND PROVIDE SOFTWARE

SEQUENCING/INTERLOCK.

THE VALVE SHALL BE FULL-SCALE RANGE.

COOLING COIL VALVE:

NORMALLY CLOSED COIL VALVE SHALL MODULATE VIA A DIRECT ACTING PID LOOP TO MAINTAIN THE SUPPLY AIR TEMPERATURE TO 53.7°F (ADJUSTABLE) FOR AHU-3 AND 54.29°F (ADJUSTABLE)

FOR AHU-4A AND AHU-4B.

SUPPLY FAN SPEED:

UPON FAN START, THE VFD SHALL LIMIT ITS ACCELERATION RATE 1% PER SECOND. THE INITIAL

STATIC PRESSURE SET POINT SHALL EQUAL 50% OF THE FAN DESIGN STATIC PRESSURE. AN

APPROPRIATE AMOUNT OF DERIVATIVE GAIN, OR A RAMP FUNCTION SHALL BE EMPLOYED TO

PREVENT AN OVERSHOOT OF THE STATIC PRESSURE SET POINT UPON FAN START-UP. THE

SUPPLY FAN SHALL MODULATE IN A REVERSE ACTING PID LOOP TO MAINTAIN SUPPLY DUCT

STATIC PRESSURE SET POINT.

HUMIDIFICATION:

SPACE HUMIDITY SENSOR, SET AT 50%, SHALL SEND AN AVERAGING SIGNAL TO CONTROL THE

HUMIDIFIER VALVE. A HIGH LIMIT HUMIDISTAT SET AT 65% (ADJUSTABLE) FOR ANIMAL HOLDING AND SHALL, UPON REACHING ITS SET POINT, CLOSE THE CONTROL VALVE AND SEND AN ALARM

SIGNAL TO THE BAS. SAME APPLIES FOR THE HUMIDITY SENSOR AT THE HUMIDIFIER.

WHEN OA TEMPERATURE IS BELOW 60°F (ADJUSTABLE) AND THE AIRFLOW IS PROVEN, THE

HUMIDIFICATION SYSTEM SHALL BE ENABLED. THE STEAM ISOLATION VALVES SHALL BE OPEN.

THE CONTROL VALVE SHALL BE OPENED.

WHEN OA TEMPERATURE IS ABOVE 60°F (ADJUSTABLE) THE HUMIDIFICATION SYSTEM SHALL BE

DISABLED AND THE STEAM ISOLATION VALVES SHALL BE CLOSED.

SAFETIES:

UPON OPERATION OF A SMOKE DETECTOR (AHU-3), THE SUPPLY FAN/ DAMPER SHALL BE DE-

ENERGIZED VIA A HARDWIRED INTERLOCK, INITIATE A SUPERVISORY SIGNAL AND ACTIVATE A

VISIBLE AND AUDIBLE. MANUAL RESET OF THE TRIPPED DEVICE SHALL BE REQUIRED TO

RESTART THE SYSTEM.

UPON OPERATION OF A FREEZESTAT (AHU-3,AHU-4A &AHU-4B), THE CORRESPONDING SUPPLY

FAN/ DAMPER SHALL BE DE-ENERGIZED VIA A HARDWIRED INTERLOCK, INITIATE A

SUPERVISORY SIGNAL AND ACTIVATE A VISIBLE AND AUDIBLE. MANUAL RESET OF THE TRIPPED

DEVICE SHALL BE REQUIRED TO RESTART THE SYSTEM.

ON A START SIGNAL TO ANY AIR-MOVING DEVICE, ALL ALARMS MUST BE CLEAR PRIOR TO UNIT

START-UP. ALL ALARMS MUST BE AVAILABLE FOR DISPLAY IN THE ECM SYSTEM.

DIFFERENTIAL PRESSURE SWITCH ACROSS FILTER BANK SHALL SEND AN ALARM TO THE BAS

SYSTEM WHENEVER 1.2 INCH WATER COLUMN (ADJUSTABLE) IS EXCEEDED.

CONTROL POINTS:

PROVIDE CONTROL INFORMATION TO BE TRENDED IN THE BAS MBC AND AVAILABLE FOR USE IN

THE AAALAC INFORMATION MANAGER. PROVIDE THE FOLLOWING CONTROL POINTS FOR EACH

OF THE ROOMS.

a. (ETR) LIGHTING CONTROL AND STATUS INCLUDING OVERRIDE.

b. TEMPERATURE CONTROL AND READING.

c. HUMIDITY CONTROL AND READING.

d. SUPPLY AND EXHAUST CFM READING.

THE RECIRCULATING PUMP SHALL BE ENERGIZED WHEN THERE IS NO COOLING OR HEATING

FLOW AT THE COIL, THE THREE-WAY VALVE HAS CLOSED THE PORT SERVING THE BUILDING

LOAD WATER CIRCULATION, AND THE OUTSIDE AIR TEMPERATURE IS 34°F (ADJUSTABLE) OR

LOWER.

THE RECIRCULATING PUMP SHALL BE DE-ENERGIZED WHEN THE OUTSIDE AIR TEMPERATURE IS

ABOVE 34°F (ADJUSTABLE) AND/OR WHEN THE CONTROL VALVE IS OPEN FOR NORMAL

COOLING OR HEATING OPERATION.

FILTER

DPS

DO

PRE-HEAT

COIL

WIRE TO

STOP FAN

COOLING

COILFZ

CR

VFD

SUPPLY FAN

DI

T

HSD

SA

(ETR) VAVs

AO AIAI AIAO

AHU-3

C H

W C

O

IL

S E

N S

O R

S T

E A

M C

O N

T R

O L

V A

LV

E

(E T

R

S P

A C

E H

IG

H

LI

M

IT

H U

M

ID

Y

S

N

S O

R

M

OA

ES

DI

OA

DAMPER

DDC

CONTROLLER

DO

PRE

FILTER

DPS

DO

C O

O

LI

N G

C

IL

N T

R O

L V

A

LV

E

F R

E E

Z E

S T

A T

F

IN

A L

F

IL

T E

R

5%

D A

M P

E R

C O

N T

R O

L

M O

T O

R

IZ

E D

D A

M P

E R

P R

E F

IL

T

E R

5%

DI DODI

F A

N S

P E

E D

F A

N S

/S

F A

N S

T A

T U

S

AO

P R

E H

E A

T C

N

T R

O L

V A

LV

E

H

AI

(E T

R

D U

C T

H

IG

LI

M

IT

H

U M

ID

Y

N S

O R

DO

A

IR

F

LO

W M

E A

S U

R

IN

G

A T

IO

N

E

A C

H F

A N

ES

DO

SA

DAMPER

DI

D A

M P

E R

C O

N T

R O

L

M O

T O

R

IZ

E D

D A

M P

E R

M

AI

T E

M P

S

E N

S O

R

T

DI

S M

O K

E D

E T

E C

T O

R

S

AI

(E T

R

S T

A

IC

P R

E S

S U

R E

S E

N S

O R

KEY NOTE:

1. WIRED TO FIRE ALARM SYSTEM AND FAN STARTER.

2. CONTRACTOR TO FIELD-VERIFY THE CONDITIONS OF THE PRESSURE SENSOR AND

REPLACE IT IF IS NOT FUNCTIONING PROPERLY.

3. NEW RECIRCULATING INLINE PUMP.

4. THE EXISTING CONDITIONS SHOWN ON THESE DRAWINGS HAVE BEEN OBTAINED FROM

AVAILABLE RECORD DRAWINGS AND GENERAL FIELD SURVEYS. THEY MAY NOT

ACCURATELY REFLECT THE ACTUAL NUMBER OF EXHAUST FANS INTERLOCKED WITH THE

AHUS. THE CONTRACTOR SHALL FIELD-VERIFY ALL EXHAUST FANS SERVING THE AREAS

WITHIN THE SCOPE AND ENSURE THAT ALL CONTROL POINTS ARE INCLUDED IN THE

SEQUENCE OF OPERATION TO ENSURE PROPER OPERATION OF THE HVAC SYSTEM.

1 2 T

AI

(E T

R

S P

A

E R

M O

S T

A T

AI

T E

M P

. S E

N S

O R

T

CR

VFD

(ETR) EXHAUST

FANS EF-1, EF-3

DI DODI

(E T

R

F A

N S

P E

E D

(E T

R

F A

N S

/S

(E T

R

F A

N S

T A

T U

S

(ETR)

AI

T E

M P

S

E N

S O

R

T

P 3P

AO

R P

H S

T A

T U

S

AO

R P

H S

T A

R T

S

T O

P

AO

R P

C S

T A

T U

S

AO

R P

C S

T A

R T

S

T O

P

EXITING TO REMAIN (ETR) CONTROL POINTS

(E T

R

R E

H E

A T

C

N T

R O

L V

A

LV

E

T E

RM

A EDP

L A

TH

H

F E

S

O

NT

S

MA

N

HU

VICERE

USA

SHEET OF TOTAL SHEET

D R

A W

IN

G

T

IT

L E

S E

A L

MARK DESCRIPTIONDATE

P R

O J E

L E

A/E CON. NO.

A/E TASK NO.

PROPERTY OF THE US GOVERNMENT

FOR OFFICIAL USE ONLY

DO NOT REMOVE THIS NOTICE

PROPERLY DESTROY DOCUMENTS WHEN NO LONGER

NEEDED

OFFICE OF

RESEARCH FACILITIES

DRAWING NO.

D R

A W

IN

G

R E

V

IS

IO

N

S C

O N

T R

A C

T O

R S

B U

IL

D

IN

G

P R

O J E

C T

A /E

N a m e a

G O

CONS. CONTR.

CONS. WORK

PRIME A/E

SUB A/E

CONSTR. CON.

FACILITY CODE

BUILDING NO.

NAME

STREET

CITY

STATE/ZIP

OTHER

BUILDING NO.

DESIGNED BY

DRAWN BY

CHECKED BY

FILE NAME

SPB TASK NO.

PROJ. OFFICER

PROJ. MGR.

SUBMISSION

SUB. DATE

WRK REQ. NO.

Salas O'Brien

BUILDING 4

NIH

9000 ROCKVILLE PIKE

BETHESDA

MARYLAND, 20892

75N99020D00010

75N99024F0002

N

IH

B U

IL

D

IN

G

R E

P L A

C E

A H

U s

A

N/A

C112354

KANIKA SHARMA

ANIL GIRI

FINAL SUBMISSION

05/13/2026

C112354

S T

R U

C T

U R

A L

E N

G

IN

E E

R

M E

C H

A N

IC

A

L C

O N

T R

O L S

M601

ID

CC

AG

MECHANICAL CONTROLS

1 05/13/25 35% CD SUBMISSION

2 07/15/25 65% CD SUBMISSION

ELECTRICAL NOTES

GENERAL NOTES

1. THE WORK TO BE DONE SHALL INCLUDE THE FURNISHING OF ALL LABOR,

MATERIALS, APPLIANCES, EQUIPMENT, TOOLS, TRANSPORTATION,

SUPERINTENDENTS AND SERVICES REQUIRED TO CONSTRUCT, INSTALL, AND

MODIFY THE ELECTRICAL SYSTEMS AS HEREIN SPECIFIED AND SHOWN ON THESE

DRAWINGS FOR A COMPLETE OPERATIONAL SYSTEM. COORDINATE WORK TO BE

PERFORMED OR INSTALLED BY OTHERS AFFECTING THE ELECTRICAL WORK, AND

PROVIDE AND INSTALL TO ENSURE CLARITY IN COMPOUND ACTIONS ALL

NECESSARY ANCHORS, SLEEVES, HANGERS, ETC. FOR ATTACHING OR

CONNECTING ELECTRICAL WORK TO…