Addendum 4 Updated Drawings.pdf

Accessory Not Included. Sold SeparatelyAccessory Not Included. Sold Separately

2"

2.5"

2" 2.5"

2"

2.5"

2.5"

2"

2"2.5"

P419

P419 P419

P419

P101

P419

P419

P101

P419

P419

P418

P419

P101

P418

P419

P101

P101

P419

P419

P101

P419

P419

P101

P419

P419

P101

P528 P505

4 4 4

3 3

3 3 3

3 3

1.25"1.25"1.25"

2" 2.5" 1.25"

1.25" 1.25"

1.25" 0.5"

2"2.5"

2"2.5"

P101

P419

P419

P419

P419

P418

P418

0.5"

0.5"

0.5"

0.5"0.5"

P809

P809

P809

P809

P809

P809

P809

P809

P809

P809

7 - 2 GPM

0.75"

1"

P101

P418

P701

P528

P418 P101

P502

P101

P418

P701

A292B

Soiled

Utility

C226B Passageway

A270A Staff Toilet

A269

Staff

Lounge

A271A

Staff

Bathroom

A272

Conference

Room

A273 Office

A275 Electrical

A274

HAC

A276 On-Call

A276A Bathroom

A268 Office

A267

RN

Manager

A293

Pharmacy

Office

A286A Toilet

A287A Toilet

A283

Negative

Pressure

Bariatric Patient

Room

A288A Toilet

A289 Grief/Consult

A285

Patient

Room

A278

Patient

Room

A279

Patient

Room

A280

Negative

Pressure

Patient Room

A281

Equipment

Storage

A282

Negative

Pressure

Bariatric Patient

Room

A283A Toilet

A284

Negative

Pressure

Patient Room

A277 Clean Linen

A290

HUC

Station

C226I

Patient

Circulation

A284B Ante Room

Elevator

A270

Male

Locker Room

A271

Female

Locker Room

P101

0.75" 0.75"

0.75"

AREA OF WORK

P: 937-224-0861 www.heapy.com

VA Project No.

JPA Project No.

Project Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

FULLY SPRINKLERED

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 STAMPCONSULTANT

321 4 5 6 7 8 9 10

Office of Construction and Facilities Management

PROJECT NO. STATE COA FIRM NO.

3131 Newmark Drive, Suite 200 Miamisburg, Ohio 45342 |www.jpaarch.com| 937.461.3290

/6

/2

:5

:0

P M

Renovate MICU/SICU

10/17/2025

PARTIAL SECOND FLOOR PLAN -

DISTRIBUTION

PP102

SVHKMB

19018.00

539-20-104

Cincinnati, Ohio

100% CONSTRUCTION

DOCUMENTS

2019-05193 01528

N Scale:Scale: 1/8" = 1'-0"1/8" = 1'-0"

PARTIAL SECOND FLOOR PLAN - DISTRIBUTION

1. EXISTING TO REMAIN.

2. PROVIDE NEW REPLACEMENT FIXTURE (TYPE AS INDICATED) IN THE SAME

LOCATION AS EXISTING FIXTURE. EXTEND NEW PIPING FROM FIXTURE AND

CONNECT TO EXISTING DCW, DHW, AND SANITARY WASTE & VENT PIPING LOCATED

IN WALL AS REQUIRED TO ACCOMMODATE NEW FIXTURE AS INDICATED.

3. BOX MOUNTED TRANSFORMER LOCATED ABOVE THE CEILING TO CONTROL

SENSOR OPERATED FAUCET ON FIXTURE(S) BELOW. 120V-1PH POWER WILL BE

LOCATED IN A WIRING BOX ABOVE THE CEILING. REFER TO DIVISION 26 DRAWINGS.

A 0.75" CONDUIT (FOR LOW VOLTAGE WIRING) STUBBED ABOVE THE CEILING AND

EXTENDED DOWN TO AN ELECTRICAL WALL BOX LOCATED BELOW EACH

LAVATORY. REFER TO DIVISION 26 DRAWINGS. PROVIDE TRANSFORMER AND LOW

VOLTAGE WIRING. COORDINATE ALL WORK WITH DIVISION 26.

4. BOX MOUNTED TRANSFORMER LOCATED ABOVE CEILING TO CONTROL SENSOR

OPERATED FLUSH VALVE ON FIXTURE(S) BELOW. 120V-1PH POWER WILL BE

LOCATED IN A WIRING BOX ABOVE THE CEILING. REFER TO DIVISION 26 DRAWINGS.

A 0.75" CONDUIT (FOR LOW VOLTAGE WIRING) STUBBED ABOVE THE CEILING AND

EXTENDED DOWN TO AN ELECTRICAL WALL BOX LOCATED ABOVE EACH WATER

CLOSET. REFER TO DIVISION 26 DRAWINGS. PROVIDE TRANSFORMER AND LOW

VOLTAGE WIRING. COORDINATE ALL WORK WITH DIVISION 26.

5. UNDER BID ITEM 2, DELETE ALL LABOR AND MATERIALS ASSOCIATED WITH THE

CONSTRUCTION, ALTERATION, PLUMBING, MECHANICAL AND ELECTRICAL

MODIFICATIONS TO THE OFFICE/ CONFERENCE/ BREAK ROOM AREAS AS

INDICATED.

6. NEGATIVELY PRESSURIZED SPACE. SEAL ALL PENETRATIONS IN WALL AND/OR

CEILING AS REQUIRED TO MAINTAIN PRESSURIZATION.

7. FLOW CONTROLLER. REFER TO DETAIL 'D' / SHEET P601.

8. NEW DOMESTIC COLD WATER, DOMESTIC HOT WATER, AND DOMESTIC HOT WATER

RETURN RISERS FROM 1ST FLOOR.

A. REFER TO SHEET P001 FOR ABBREVIATIONS, SYMBOLS & INDEX OF DRAWINGS.

B. MAINTAIN AND RESTORE, IF INTERRUPTED, DOMESTIC WATER SUPPLY, MEDICAL

GAS & VACUUM SYSTEMS AND SANITARY & VENT SYSTEMS TO EXISTING

FIXTURES LOCATED IN AN UNDISTURBED AREA.

C. IN THE RENOVATION AREA, CORRECT ANY DOMESTIC WATER, MEDICAL GAS,

SANITARY & VENT PIPE LABELING ON EXISTING PIPING THAT IS MISLABELED/

MISSING LABELS AND/ OR FLOW ARROWS.

D. REFER TO SPECIFICATIONS 22 05 11 SECTION 1.3.B. ASME A13.1 SCHEME

FOR THE IDENTIFICATION OF PIPING SYSTEMS.

E. ALL SANITARY DRAIN, STORM AND DISTRIBUTION PIPING RUN OVER HVAC

EQUIPMENT, ELECTRICAL PANELS/ EQUIPMENT, OR MEDICAL EQUIPMENT

SHALL HAVE SPILL/ LEAK PROTECTION AND LEAK DETECTING SENSORS.

F COORDINATE ALL EXISTING PIPING AND NEW PIPING WITH NEW MEPT SYSTEMS

AND EQUIPMENT AND PATIENT LIFT SUPPORTS, RAILS, AND EQUIPMENT.

GENERAL NOTES

PLAN NOTES

KEYPLAN

A. REFER TO THE ARCHITECTURAL DOCUMENTS FOR A SEQUENCE OF CONSTRUCTION

PLAN, WHICH INCLUDES DETAILED NOTES REGARDING PROJECT PHASING. ALL

WORK SHALL BE COORDINATED AND SCHEDULED WITH THIS CONSTRUCTION

SEQUENCE. ALL REQUIRED SHUTDOWNS SHALL BE IDENTIFIED AT THE START OF

CONSTRUCTION AND SHALL BE COORDINATED AND SCHEDULED WITH THE VA.

PHASING NOTE

Revisions Date

6 Addendum #4 2026-01-06

UP DN36x14

UP36x14

DN14x12

DN16x10

DN18x10

UP & DN14x12

UP16x10

UP16x10

UP18x10

HAC

A380

Female Locker

A382C

M. Lock.

A382B

Lounge

A382

Tlt.

A382A Respiratory Therapy

A384

Clean Supply

A397

Pharm.

A386

Sig.

A396 Corridor

C*3*18

Elec.

A395

Soil Utility

A391

Linen Clos.

A389

Tlt.

A388

Equip. Stor.

A392

Nurse Off.

A390

Negative Pressure Patient Room

A387K

Patient Room

A387J

Patient Room

A387I

Shower

A387H

Patient Room

A387G

Patient Room

A387F

Patient Room

A387E

Patient Room

A387D

Patient Room

A387C

Patient Room

A387B

Negative Pressure Patient Room

A387A

Nurse Station

A387

Conference Room

A385

ICU Dir. Off.

C314

Soc. Wrk.

A383

Family Wtng.

C310

Grieve Consult

C313

Lactation

C312

18x10

16x10

UP14x12

DN20x8

UP14x14

14x8

10x6

8x14

?x?

UP?

8x

10ø

CD1

DN26x8

UP20x20

TO EF

TO 1-EF-25

TO EF-26

TO EF

TO EF

TO EF

DN10x10

TO EF-27

TO EF

8x

10ø

CD1

VAV-12

VAV-01

11/2" RS DOWN

1-1/8" RS DOWN

42x14

165 CFM

65 CFM

75 CFM 3

3 3

ACCU-396

1/2" RS UP

1-1/8" RL UP

AHU-5 AHU-4

UP14x8

UP14x8

TO EF

TO EF

OUTDOOR AIR

INTAKE

AHU4

CONDITIONED

VESTIBULE

BETWEEN

AHUs

OUTDOOR AIR

INTAKE

RELIEF AIR

AHU5

ROOF DRAIN

RELIEF AIR

CC-2

10x10 x1

12x10 10x10

UP19x19

7 335 CFM

DN16x10

AREA OF WORK

P: 937-224-0861 www.heapy.com

VA Project No.

JPA Project No.

Project Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

FULLY SPRINKLERED

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 STAMPCONSULTANT

321 4 5 6 7 8 9 10

Office of Construction and Facilities Management

PROJECT NO. STATE COA FIRM NO.

3131 Newmark Drive, Suite 200 Miamisburg, Ohio 45342 |www.jpaarch.com| 937.461.3290

/6

/2

:4

:0

P M

Renovate MICU/SICU

10/17/2025

PARTIAL THIRD FLOOR PLAN -

DUCTWORK - NEW WORK

MH103

AJGBRB

19018.00

539-20-104

Cincinnati, Ohio

100% CONSTRUCTION

DOCUMENTS

2019-05193 01528

N Scale:Scale: 1/8" = 1'-0"1/8" = 1'-0"

PARTIAL THIRD FLOOR PLAN - DUCTWORK - NEW WORK

PLAN NOTES

1. EXISTING REFRIGERANT PIPING ASSOCIATED WITH THE ACCU-06 SYSTEM SHALL BE

RE-USED. COORDINATE NEW EQUIPMENT AND PIPING WITH THE MANUFACTURER OF

THE EXISTING VRF SYSTEM.

2. PROVIDE TYPE "A" FIRE DAMPER AT FLOOR PENETRATION TO LEVEL 2. SEE DETAIL.

PROVIDE DUCT ACCESS DOOR. COORDINATE WALL ACCESS PANEL LOCATION WITH

COR,

3. REBALANCE GRILLE TO INDICATED CFM.

4. PROVIDE NEW DX COOLING COIL IN SPARE SECTION OF AIR HANDLING UNIT. PROVIDE

INSULATED STAINLESS STEEL DRAIN PAN WITH COOLING COIL. CONNECT

REFRIGERANT PIPING TO COIL PER MANUFACTURER'S INSTRUCTIONS. DRAIN

CONDENSATE TRAP TO ROOF TO MATCH EXISTING COOLING CONDENSATE DRAIN.

5. PROVIDE BIPOLAR IONIZATION AIR PURIFICATION SYSTEM UPSTREAM OF FIRST

COOLING COIL. REFER TO SPECIFICATION SECTION 23 40 00.

6. PROVIDE 0.5"X0.5" WEATHER RESISTANT WIRE MESH BIRD SCREEN OVER OPENING.

PROVIDE WEATHER HOOD AT END OF DUCT.

7. BALALNCE DUCT TRAVERSE TO INDICATED CFM.

8. AUXILIARY RELIEF AIR DAMPER.

9. EMERGENCY EXHAUST AIR DAMPER.

10. THE EQUIPMENT MANUFACTURER SHALL PROVIDE ALL REFRIGERATION CONTROLS,

SAFETIES, AND LEAK DETECTION. THIS INCLUDES AN A2L REFRIGERANT LEAK

DETECTION SYSTEM COMPLETE WITH SENSORS AND A DEDICATED CONTROLLER.

THE A2L CONTROLLER SHALL PROVIDE AN ALARM CONTACT FOR BAS MONITORING

AND INTERFACE WITH THE REFRIGERATION SYSTEM DDC CONTROLLER. THE

MANUFACTURER SHALL DETERMINE THE QUANTITY OF SENSORS AND PROVIDE ON-

SITE ASSISTANCE FOR INSTALLATION AND PROPER PLACEMENT OF A2L SENSORS

INSIDE THE EXISTING AIR HANDLER CASING. THE REFRIGERATION SYSTEM SHALL

INCLUDE A DDC CONTROLLER THAT MONITORS THE A2L CONTROLLER VIA MODBUS

INTERFACE. THE DDC CONTROLLER SHALL ACCEPT AN INPUT FROM THE BAS FOR

REFRIGERATION CAPACITY CONTROL AND PROVIDE AN OUTPUT TO ENERGIZE OR

DE-ENERGIZE THE FAN DURING A LEAK DETECTION EVENT. THE REFRIGERATION

SYSTEM DDC CONTROLLER SHALL ALSO ACCEPT FAN STATUS FEEDBACK IF

REQUIRED FOR PROPER LEAK DETECTION LOGIC.

KEYPLAN

GENERAL NOTES

1. LABEL ALL MECHANICAL EQUIPMENT PER SPECIFICATION, INCLUDING EXHAUST FANS,

VALVES, VAV BOXES, AND AIR VALVES. ANY OUTDOOR LABELING SHALL BE

WEATHER- RESISTANT. COORDINATE ALL LABELING WITH THE VA PRIOR TO

ORDERING THE LABELING.

PHASING NOTE:

A. REFER TO THE ARCHITECTURAL DOCUMENTS FOR A SEQUENCE OF

CONSTRUCTION PLAN, WHICH INCLUDES DETAILED NOTES REGARDING THE

REQUIRED PROJECT PHASING. ALL WORK SHALL BE COORDINATED AND

SCHEDULED WITH THIS CONSTRUCTION SEQUENCE. ALL REQUIRED SHUTDOWNS

SHALL BE IDENTIFIED AT THE START OF CONSTRUCTION AND SHALL BE

COORDINATED AND SCHEDULED WITH THE VA.

Revisions Date

7 Addendum #4 2026-01-06

FILTER TAG CFM SYSTEM

MERV

RATING

EFFICIENCY

MAX. S.P. DROP (1)

INITIAL FINAL

HOUSING TYPE

MAX.

FACE

VELOCITY

SEE

NOTE

HEPA-3 18,000

EF-3 EMERGENCY

EXHAUST

35%

99.97%

0.38"

0.8"

0.76"

2.0"

WEATHER PROOF SIDE

ACCESS HOUSING

450 1,2,3

NOTES:

1. STATIC PRESSURE REQUIREMENTS BASED ON 500 FPM FACE VELOCITY. FINAL PRESSURE DROP BASED ON VA'S RECOMMENDED CHANGE OVER PRESSURE DROP.

2. BAG-IN/BAG-OUT HEPA FILTER MODULE WITH REDUNDANT PAIR AND BUBBLE TIGHT DAMPERS AT EACH PAIR. CAMFIL MODEL NO. CF-3X4-212P-4GB-SS

3. PREFILTER SIZE 24"X24"X2" (NOM.) - QTY 12. HEPA FILTER SIZE 24"X24"X12" (NOM.) - QTY 12.

AIR FILTER SCHEDULE

P: 937-224-0861 www.heapy.com

VA Project No.

JPA Project No.

Project Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

FULLY SPRINKLERED

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 STAMPCONSULTANT

321 4 5 6 7 8 9 10

Office of Construction and Facilities Management

PROJECT NO. STATE COA FIRM NO.

3131 Newmark Drive, Suite 200 Miamisburg, Ohio 45342 |www.jpaarch.com| 937.461.3290

/6

/2

:4

:0

P M

Renovate MICU/SICU

10/17/2025

SCHEDULES

M602

AJGBRB

19018.00

539-20-104

Cincinnati, Ohio

100% CONSTRUCTION

DOCUMENTS

2019-05193 01528

M A

R K

DESCRIPTION LOCATION A

IR

F L

O W

C

F M

DX COOLING APPROX. DIMENSIONS

SEISMIC

RESTRAINTS

T O

T A

L C

A P

A C

IT

Y

M

B H

S E

N S

IB

L E

C A

P A

C

IT

Y

M B

H

E N

T E

R

IN

G A

IR

T

E M

P E

R A

T U

R E

D B

/W B

°F

L E

A V

IN

G

A

IR

T E

M P

E R

A T

U R

E D

B

°F

L E

N G

T H

W

ID

T H

H E

IG

H

T

R E

Q U

IR

E

D

I M

P O

R T

A N

C E

F A

C T

O R

CC-2 DX COOLING COIL AHU-5 20,000 872.8 592.2 80.0 / 67.0 53.0 / 52.6 120" 10" 86" ● 1.5

NOTES:

1. FACE VELOCITY TO BE BASED ON SUPPLY FAN CFM.

GENERAL NOTES:

A. CONDENSING UNITS SHALL INCLUDE LOW AMBIENT CONTROLS AND

ACCESSORIES, OPERATIONAL TO 20°F.

B. CONDENSING UNIT COOLING CAPACITY SHALL BE BASED ON 95°F AMBIENT

CONDITIONS.

2. REFRIGERANT PIPE SIZES SHALL BE PER MANUFACTURER'S

RECOMMENDATIONS.

SPLIT SYSTEM COOLING COILS

OUTDOOR CONDENSING UNIT - AIR COOLED

REFRIGERANT

CONN. SIZE

H O

T G

A S

B Y

P A

S S

S E

E N

O T

E

M A

R K

DESCRIPTION N

O

M

IN

A L

T O

N S

S

IZ

E

D T

O M

A T

C H

C O

IL

V A

R

IA

B L

E S

P E

E D

C O

M P

R E

S S

O R

(S

ELECTRICAL SERVICE

SEISMIC

RESTRAINTS

L

IQ

U

ID

L

IN

E

S U

C T

IO

N

L

IN

E

V O

L T

A G

E

P H

A S

E

F U

L L

L O

A D

A M

P S

F

L A

M

IN

C

IR

C U

IT

A

M P

S

M C

A

M A

X O

V E

R C

U R

R E

N T

P R

O T

E C

T

IO

N

M O

C P

M

IN

IM

U

M S

C C

R

A M

P S

R E

Q U

IR

E

D

I M

P O

R T

A N

C E

F A

C T

O R

CU-2 AIR-COOLED CONDENSING UNIT 80 - 480 - 3 175 200 200 35KAIC ● 1.5 1.125 2.125 - 1,2,3

E. ELECTRIC SERVICES FOR OUTDOOR UNIT AND INDOOR UNIT - SINGLE POINT

POWER SERVICE CONNECTIONS TO EACH UNIT. UNLESS NOTED OTHERWISE,

ADEQUACY OF LISTED CIRCUIT SIZES MUST BE VERIFIED BY H.C. AND UNIT

SUPPLIER. COST FOR INCREASE OR CHANGE OF ELECTRIC SERVICE FOR

EQUIPMENT SELECTED SHALL BE BORNE BY H.C.

C. WHEN APPLICABLE, REFER TO SPECIFICATIONS FOR VIBRATION ISOLATOR

TYPES AND SEISMIC RESTRAINT REQUIREMENTS.

D. REFRIGERANT PIPING - SIZES LISTED ARE APPROX. CIRCUITING, SIZING,

NUMBER OF PIPES AND CIRCUITS, ARRANGEMENT, ETC. SHALL BE IN

ACCORDANCE WITH MANUFACTURER'S RECOMMENDATIONS.

DX COOLING COIL

NOTES:

1. FAN HORSEPOWER LISTED IS FOR ONE FAN. FANS SYSTEM

SHALL CONTAIN TWO FANS WITH 100% REDUNDANCY.

2. FAN NOISE SHALL NOT EXCEED 62 DB'A' AT 10 FT WHILE

OPERATING AT 60 HZ.

GENERAL NOTES:

A. ALL FANS SHALL BE A.M.C.A. 211 AND 311 PERFORMANCE

CERTIFIED AND SHALL BEAR THE A.M.C.A. LABEL.

B. SONES VALUES BASED ON A.M.C.A. 301 MEASURED AT 5 FT.

C. MOTOR HORSEPOWERS LISTED SHALL BE CONSIDERED MINIMUM.

E. ROOF & WALL OPENINGS ARE APPROX. VERIFY SIZE &

COORDINATE.

F. COORDINATE STEEL FRAMING AROUND ROOF OPENING WHERE

REQUIRED FOR DECK SUPPORT, AND WALL LINTELS FOR WALL

OPENINGS.

G. WHEN APPLICABLE, REFER TO SPECIFICATIONS FOR VIBRATION

ISOLATOR TYPES AND SEISMIC RESTRAINT REQUIREMENTS.

H. VFD'S SHALL BE CONSTRUCTED AND LABELED FOR REQUIRED

SCCR (SHORT CIRCUIT CURRENT RATING). COORDINATE WITH

DIVISION 26.

I. IF EC MOTORS ARE INDICATED OR SPECIFIED, EACH MOTOR SHALL

BE PROVIDED WITH FACTORY DISCONNECTING MEANS, INTERNAL

OVERLOAD PROTECTION, FIELD ADJUSTABLE SPEED CONTROL,

AND REMOTE ANALOGUE SPEED CONTROL INPUT WHEN REMOTE

CONTROL IS SPECIFIED, COORDINATED WITH THE BUILDING

AUTOMATION SYSTEM.

FANS

M A

R K

DESCRIPTION SERVICE C

O

N N

E C

T E

D C

F M

F A

N C

F M

S T

A T

IC

P

R E

S S

U R

E

IN

W

.C

A P

P R

O X

W

H E

E L D

IA

M

E T

E R

M A

X

IM

U M

S O

N E

S

MOTOR

A P

P R

O X

R

O O

F /W

A L L

O P

E N

IN

G

A P

P R

O X

W

E

IG

H T

L

B S

V

IB

R A

T

IO

N I S

O L A

T O

R T

Y

E

SEISMIC

RESTRAINTS

S E

E N

O T

E

H O

R S

E P

O W

E R

H

P

V O

L T

A G

E

P H

A S

E

E L

E C

T R

O N

IC

A

L L Y

C O

M M

U T

A T

D

V A

R

IA

B L E

F R

E Q

U E

N C

Y D

R

IV

E

R E

Q U

IR

D

I M

P O

R T

A N

C E

F A

C T

O R

EF-3 HIGH PLUME EXHAUST FAN ISOLATION EXHAUST 18,000 19,390 3.4 - NOTE 2 25 460-3 - ● - 6,445 ● 1.5 1

Revisions Date

7 Addendum #4 2026-01-06

3. MAX. REFRIGERANT CHARGE PER CIRCUIT, 150 LBS

EXHAUST FAN

START/STOP

SAFETY SHUTDOWN RELAY

EXHAUST FAN

EA-5DRIVE SPEED

NC

H DP

EAP-LL-6

L

LOW STATIC CUTOUT

SAFETY SHUTDOWN

H

HEPA FILTER

LDP

H

PRE-FILTER

DP-PRE-FLTR-3

LDP

FAN VFD

EXHAUST FAN

START/STOP

SAFETY SHUTDOWN RELAY

EXHAUST FAN

DRIVE SPEED

NC

H

HEPA FILTER

LDP

H

PRE-FILTER

LDP

FAN VFD

STAT-EF-2

FAN

STATUS

STAT-EF-2FAN

STATUS

EAF-SS-1

EAF-SS-1DP-FNL-FLTR-4

MANUAL

DAMPER

MANUAL

DAMPER

DP

EASP-7

L

(DOWNSTREAM OF AIR HANDLING

UNIT, MULTIPLE SENSORS)

H

MANUAL

DAMPER

EXHAUST AIR

EMERGENCY

HMANUAL

DAMPER

EXHAUST AIR

STATIC PRESSURE

EXHAUST FAN CONTROL SEQUENCES

1. EMERGENCY EXHAUST MODE TO BE STARTED MANUALLY, AND INITIATED BY USER

THROUGH THE BUILDING AUTOMATION SYSTEM.

2. INTEGRATE EXHAUST FAN STARTUP WITH AHU-5 SEQUENCE. WHEN EMERGENCY

EXHAUST SYSTEM IS ACTIVATED, AHU-5 RETURN AIR DAMPER SHALL BE FULLY CLOSED,

AND ITS OUTSIDE AIR AND RELIEF AIR DAMPERS SHALL BE FULLY OPEN. AHU-5 SHALL

OPERATE AT 100% OUTSIDE AIR.

3. WHEN OPERATING IN EMERGENCY EXHAUST MODE, AUXILIARY RELIEF AIR DAMPER SHALL

BE FULLY CLOSED AND EMERGENCY EXHAUST AIR DAMPER SHALL BE FULLY OPEN.

REFER TO AHU-5 SECTION ON SHEET MH103.

4. WHEN OPERATING IN EMERGENCY EXHAUST MODE, FANS SHALL OPERATE

CONTINUOUSLY, 24/7/365, IN AN N+1 ARRANGEMENT, LEAD-LAG CONTROL, WITH LEAD

SWITCHING WEEKLY.

5. ON A COMMAND TO START, THE ISOLATION DAMPER SHALL OPEN WITH END-SWITCH

PROVED OPEN.

6. WHEN THE DAMPER IS OPEN, THE FAN SHALL START VIA THE END SWITCH WIRED IN

SERIES WITH THE MOTOR VFD SAFETY CIRCUIT. FANS WITH A DISCONNECT NEAR THE

MOTOR SHALL HAVE AN EARLY BREAK CONTACT INSTALLED AT THE DISCONNECT, SO

THAT IF THE MOTOR IS SHUTDOWON AT THE DISCONNECT, THE VFD IS OPENED (TURNED

OFF) AND THE ISOLATION DAMPERS CLOSE.

7. SYSTEM CONTROL - FAN SYSTEM SHALL MAINTAIN DUCT STATIC PRESSURE, WITH BYPASS

DAMPER MODULATING TO MAINTAIN DUCT STATIC. THE BYPASS DAMPERS SHALL BE

MODULATED TO A DUCT STATIC PRESSURE SENSOR LOCATED AS SHOWN ON THE

DRAWINGS. A PROPORTIONAL PLUS INTEGRAL CONTROL SHALL PROVIDE A COMMON

CONTROL SIGNAL TO THE SYSTEM TO PROVIDE A STATIC PRESSURE OF -0.5” W.G. (ADJ.)

AT THAT POINT.

8. FAN SOFT START – WHEN COMMANDED TO RUN, THE VARIABLE-SPEED DRIVES SHALL BE

BROUGHT UP TO FULL SPEED OVER A 90 SECOND PERIOD.

9. FAN SPEED TO MAINTAIN SCHEDULED PLUME HEIGHT, AS SET BY BALANCING

CONTRACTOR AT TIME OF INITIAL FAN BALANCE BY MEASURING OUTLET VELOCITY AT

NOZZLE.

10. SAFETIES – THE FOLLOWING SHALL BE PROVIDED TO STOP THE EXHAUST FANS AND

POSITION THE CONTROL DEVICES TO THEIR “FAIL SAFE” POSITION. SAFETIES SHALL BE

WIRED INTO THE FAN STARTER CIRCUIT SUCH THAT THE SAFETY SHALL FUNCTION

WHETHER THE START SELECTOR SWITCH IS IN THE “HAND”, “ON” OR AUTOMATIC

POSITION.

A. EXHAUST AIR DUCT HIGH NEGATIVE PRESSURE CUTOUT – PROVIDE A MANUAL RESET

TYPE DUCT STATIC PRESSURE SWITCH, SET AT THE MAXIMUM NEGATIVE WORKING

PRESSURE OF THE DUCTWORK, TO STOP THE FAN SYSTEM ON AN INCREASE OF

DUCT STATIC ABOVE SETPOINT.

B. EXHAUST AIR LOW STATIC CUTOUT SAFETY SHUTDOWN - PROVIDE A MANUAL RESET

TYPE DUCT STATIC PRESSURE SWITCH, SET AT THE MAXIMUM NEGATIVE WORKING

PRESSURE OF THE DUCTWORK, TO STOP THE FAN SYSTEM ON A DECREASE OF DUCT

STATIC ABOVE -4” WG (ADJ.).

C. AHU-5 RETURN AIR DUCT STATIC PRESSURE - PROVIDE A MANUAL RESET TYPE DUCT

STATIC PRESSURE SWITCH, SET AT THE MAXIMUM NEGATIVE WORKING PRESSURE

OF THE DUCTWORK, TO STOP INCREASING THE FAN SPEED ON AN INCREASE OF

DUCT STATIC ABOVE SETPOINT DURING SWITCHOVER.

11. ALARMS:

A. CURRENT SENSING – ALARM BAS UPON LOSS OF CURRENT.

B. PRESSURE DIFFERENTIAL ACROSS FAN – ALARM BAS UPON DROP IN DIFFERENTIAL

PRESSURE ACROSS FAN.

C. AHU-5 RETURN AIR DUCT STATIC PRESSURE - ALARM BAS UPON INCREASE OF DUCT

STATIC ABOVE STATIC SETPOINT.

12. TESTING:

A. WEEKLY TESTING SHALL BE PERFORMED WITH FAN OPERATING AT 75% CAPACITY

(ADJ.), HEPA FILTER MANUAL DAMPERS CLOSED, AND BYPASS OPEN TO MAXIMUM

WITHOUT REGARD TO PLUME HEIGHT. FANS SHALL OPERATE IN LEAD-LAG, IN AN N+1

ARRANGEMENT, WITH LEAD SWITCHING AFTER FOUR (4) HOUR (ADJ.) RUNTIME, AND

SECOND LEAD OPERATING FOR ANOTHER FOUR (4) HOURS (ADJ.)

B. MONTHLY TESTING SHALL BE PERFORMED IN CONJUNCTION WITH SHUTDOWN AND

ISOLATION OF ASSOCIATED RETURN FAN OF AHU-5. FAN SYSTEM OPERATION SHALL

BE AS DESCRIBED IN ABOVE SEQUENCE OF OPERATION. FAN SYSTEM SHALL

OPERATE FOR ONE (1) DAY (ADJ.) WITH EACH FAN RUNNING FOR TWELVE (12) HOURS

EACH (ADJ.).

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NAME

DOTYPE

NOTES

EMERGENCY EXHAUST FANS

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MOTORIZED ISOLATION

DAMPER STATUS

DAMPER

OPEN/CLOSED

HF-EF-9

M

HF-EF-8

MOTORIZED ISOLATION

DAMPER STATUS

DAMPER

OPEN/CLOSED

HF-EF-9

M O

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MOTORIZED ISOLATION

DAMPER STATUS

DAMPER

OPEN/CLOSED

HF-EF-9

NO

HF-EF-8

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MOTORIZED ISOLATION

DAMPER STATUS

DAMPER

OPEN/CLOSED

HF-EF-9 NC

DI

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P: 937-224-0861 www.heapy.com

VA Project No.

JPA Project No.

Project Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

FULLY SPRINKLERED

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 STAMPCONSULTANT

321 4 5 6 7 8 9 10

Office of Construction and Facilities Management

PROJECT NO. STATE COA FIRM NO.

3131 Newmark Drive, Suite 200 Miamisburg, Ohio 45342 |www.jpaarch.com| 937.461.3290

/6

/2

:4

:0

P M

Renovate MICU/SICU

10/17/2025

CONTROLS

M902

AJGBRB

19018.00

539-20-104

Cincinnati, Ohio

100% CONSTRUCTION

DOCUMENTS

2019-05193 01528

SCALE: NONE

EMERGENCY EXHAUST SYSTEM CONTROLS

Revisions Date

7 Addendum #4 2026-01-06

AHU SEQUENCE

1. THE UNIT SHALL BE PROVIDED WITH FACTORY MOUNTED UL LISTED A2L MITIGATION

CONTROLLER. THE A2L MITIGATION CONTROLLER IS PART OF THE REFRIGERANT

DETECTION SYSTEM AND IS DESIGNED TO DETECT A2L REFRIGERANT LEAKS IN THE

AIRSTREAM AND/OR CABINET.

A. AN ALARM IS TRIGGERED BY ANY ONE OR MORE OF THE ATTACHED SENSORS

DETECTING A A2L REFRIGERANT LEAK OR BY THE CONTROLLER NOT DETECTING A

SENSOR CONNECTION THE ALARM STATE, THE CONTROLLER WILL ENABLE THE

SUPPLY FAN, DISABLE THE COMPRESSORS, ENABLE THE ALARM, AND ALARM TO THE

BAS THRU AN ALARM RELAY CONTACT.

B. IF THE CONTROLLER DOES NOT RECEIVE PROOF OF FLOW WITHIN 2.5 MINUTES AFTER

ENABLING THE FAN IN THE ALARM STATE, OTHERWISE THE FAN WILL BE DE-

ENERGIZED AND REINITIATE MITIGATION MODE.

C. THE A2L CONTROLLER WILL REMAIN IN THE ALARM STATE FOR FIVE MINUTES AFTER

THE SENSOR IS CLEARED BEFORE RETURNING TO NORMAL OPERATION.

D. IF A CABINET SENSOR DETECTS A A2L REFRIGERANT LEAK THE CONTROLLER WILL

DISABLE THE COMPRESSORS, AND ALARM TO THE BAS THRU AN ALARM RELAY

CONTACT.

2. UPON AN ALARM OF THE AIR HANDLER A2L MITIGATION CONTROLLER REFRIGERANT LEAK

DETECTION IN THE AIRSTREAM (MONITORED BY THE BAS THRU THE MITIGATION

CONTROLLER ALARM RELAY CONTACT AND ALSO THRU BACNET COMMUNICATION). THE

BAS SHALL DRIVE ALL VAV DAMPER POSITION TO FULL AIRFLOW SETPOINT.