502-16-104 Mechanical Rev. 1 Drwgs MH103 MH104 M504.pdf

2'-2"

2'-2"

5'-1

2'-10"

1'-6"

NEW DUCT (INSIDE

DIMENSIONS: WIDTH X DEPTH)

EXISTING DUCT TO REMAIN

EXISTING DUCT TO BE

DEMOLISHED

LINE TYPE LEGEND

NEW PIPING

EXISTING PIPING TO REMAIN

EXISTING PIPING TO BE DEMOLISHED

EX. SD 30

EX. SD 45

EX. SD 30

EX. SD 40

EX. SD 20

EX. SD 30

EX. SD 45 EX. SD 40

EX. SD 20

EX. SD 40

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EX. SD 90

EX. SD 90

EX. ED 290

EX. ED 70

EX. ED 70

EX. ED 70

EX. ED 65

EX. ED 65

EX. ED 60

EX. ED 155

EX. ED 15

EX. ED 15

EX. SD 30

EX. ED 15

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EX. ED 20

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EX. ED 85

EX. ED 30

EX. ED 35

EX. ED 25

EX. ED 80

(TYP.)

(TYP.)

10x8

EX. FCU

(TYP.)

EX. FCU

(TYP.)

01 NEW EXHAUST SHAFT WITH NEW 18"X18"

EXHAUST DUCT, SEE ARCHITECTURAL FOR

MORE INFORMATION.

02 REPLACE EXISTING 16"X19" EXHAUST DUCT

WITH NEW 20"X16" EXHAUST DUCT IN SHAFT.

03 BALANCE EXISTING EXHAUST GRILLE(S) IN

ROOM TO QUANTITY INDICATED.

04 BALANCE SUPPLY OUTDOOR AIRFLOW INTO

EXISTING FAN COIL UNIT TO QUANTITY

INDICATED. FOR ROOMS WITH MULTIPLE FAN

COIL UNITS, THE OUTSIDE AIR TO EACH UNIT

SHALL BE BALANCED TO THE QUANTITY

INDICATED. PERMANENTLY OPEN MOTORIZED

OUTSIDE AIR DAMPER TO EACH FAN COIL

UNIT.

05 PROVIDE NEW FIRE DAMPER AT FLOOR SLAB

PENETRATION.

06 RECONNECT EXISTING HORIZONTAL DUCT

LEAVING THE SHAFT INTO NEW DUCT RISER.

PROVIDE FIRE DAMPER AT SHAFT

PENETRATION. FIELD CONFIRM THE SIZE OF

THE EXISTING HORIZONTAL SHAFT PRIOR TO

ORDERING THE FIRE DAMPER.

07 PROVIDE 2" HPS AND 1

" LPR PIPING FROM

BASEMENT TO ROOF. REFER TO MH105 FOR

CONTINUATION.

A FOR ALL FAN COIL UNITS ON THIS FLOOR

REFER TO DETAIL 12 / M-501 FOR NEW

COMBINATION SHUT-OFF / STRAINER /

BALANCING VALVES TO BE ADDED TO BOTH

THE CHILLED WATER AND HEATING WATER

LINES. CONTROL VALVES TO REMAIN.

SECOND FLOOR MECHANICAL PLAN

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

SECOND FLOOR MECHANICAL PLAN

0 4 8 16

N

O

R

T

H

TRUE

WALL RATING LEGEND

N

KEY PLAN

SCALE: NO SCALE

BUILDING 2

TRUE

AREA OF WORK

KEY NOTES:

Revisions: Date

Drawing Title:

Approved: Project Director

Project Title

Location

VA PROJECT NUMBER

Building Number

Drawing Number

Dwg of

VA FORM 08-6231

# 2

Office of

Construction and Facilities

Management

CONSULTANTS: PROJECT MANAGER:

SHEET NOTES:

Date Checked Drawn

FULLY SPRINKLERED

ACG Project Number

Headquarters:

Apogee Consulting Group, P.A.

1151 Kildaire Farm Road, Suite 120

Cary, North Carolina 27511 www.acg-pa.com 919-858-7420

U.S. Department of Veterans Affairs# © COPYRIGHT Apogee Consulting Group, P.A.

502-16-104

TAMEKA J. TAYLOR

5-15-2020

100% SUBMISSION

17-108

2495 SHREVEPORT HWY. PINEVILLE, LA 71360

REPLACE HVAC SYSTEM

1 HR - FIRE SEPARATION

2 HR - FIRE SEPARATION

SMOKE RESISTIVE HAZARDOUS AREA

S S S S

SWRPLH

MH103

09 21

VA COMMENTS 5/15/20201

DocuSign Envelope ID: FC52A366-4C33-40F9-8CAE-C17A7D694A8F

5/15/2020

NEW DUCT (INSIDE

DIMENSIONS: WIDTH X DEPTH)

EXISTING DUCT TO REMAIN

EXISTING DUCT TO BE

DEMOLISHED

LINE TYPE LEGEND

NEW PIPING

EXISTING PIPING TO REMAIN

EXISTING PIPING TO BE DEMOLISHED

EX. SD 40

EX. SD 60

EX. SD 60

EX. SD 20

EX. SD 20

EX. SD 65

EX. SD 90

EX. SD 90

EX. SD 35

EX. SD 45

EX. SD 50

EX. SD 65

EX. SD 45

EX. SD 40

EX. SD 20

EX. SD 40

EX. SD 30

EX. SD 60

EX. SD 90

EX. SD 35 EX. SD 35

EX. SD 240

EX. SD 35

EX. SD 50

EX. SD 80

EX. SD 70

EX. SD 25

EX. SD 25

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EX. SD 80

EX. SD 80

EX. ED 285

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EX. SD 20

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EX. ED 55

EX. ED 55

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EX. ED 30

EX. ED 35

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EX. ED 50

EX. ED 35

EX. ED 215

EX. ED 80EX. ED 80

EX. ED 40

EX. ED 100

EX. ED 35

EX. ED 60

EX. ED 40

EX. ED 55

EX. ED 190

(TYP)

(TYP)

EX. SD 45

EX. ED 35

EX. SD 50

EX. ED 80

EX. SD 20

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EX. ED 35

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EX. SD 45

EX. ED 35

EX. SD 45

EX. ED 35

EX. SD 45

EX. ED 35

EX. SD 45

EX. ED 35

10x8

EX. FCU

(TYP.)

EX. FCU

(TYP.)

01 REPLACE EXISTING 22"x18" EXHAUST DUCT IN

SHAFT WITH 36"x18" NEW EXHAUST DUCT.

02 DEMOLISH EXISTING JOHNSON CONTROLS

THREE WAY CONTROL VALVE AND PROVIDE

SIEMENS THREE WAY CONTROL VALVE IN IT'S

PLACE.

03 NEW EXHAUST SHAFT WITH 22"x22" EXHAUST

DUCT, SEE ARCHITECTURAL FOR MORE

INFORMATION.

04 BALANCE EXISTING EXHAUST GRILLE OR

REGISTER IN ROOM TO QUANTITY INDICATED.

05 BALANCE SUPPLY OUTDOOR AIRFLOW INTO

EXISTING FAN COIL UNIT TO QUANTITY

INDICATED. FOR ROOMS WITH MULTIPLE FAN

COIL UNITS, THE OUTSIDE AIR TO EACH UNIT

SHALL BE BALANCED TO THE QUANTITY

INDICATED. PERMANENTLY OPEN MOTORIZED

OUTSIDE AIR DAMPER TO EACH FAN COIL

UNIT.

06 RECONNECT EXISTING HORIZONTAL DUCT

LEAVING THE SHAFT INTO NEW DUCT RISER.

PROVIDE FIRE DAMPER AT SHAFT

PENETRATION. FIELD CONFIRM THE SIZE OF

THE EXISTING HORIZONTAL SHAFT PRIOR TO

ORDERING THE FIRE DAMPER.

07 PROVIDE 2" HPS AND 1

" LPR PIPING FROM

BASEMENT TO ROOF. REFER TO MH105 FOR

CONTINUATION.

THIRD FLOOR MECHANICAL PLAN

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

THIRD FLOOR MECHANICAL PLAN

0 4 8 16

N

O

R

T

H

TRUE

A FOR ALL FAN COIL UNITS ON THIS FLOOR

REFER TO DETAIL 12 / M-501 FOR NEW

COMBINATION SHUT-OFF / STRAINER /

BALANCING VALVES TO BE ADDED TO BOTH

THE CHILLED WATER AND HEATING WATER

LINES. CONTROL VALVES TO REMAIN UNLESS

NOTED OTHERWISE TO BE REPLACED.

WALL RATING LEGEND

N

KEY PLAN

SCALE: NO SCALE

BUILDING 2

TRUE

AREA OF WORK

KEY NOTES:

Revisions: Date

Drawing Title:

Approved: Project Director

Project Title

Location

VA PROJECT NUMBER

Building Number

Drawing Number

Dwg of

VA FORM 08-6231

# 2

Office of

Construction and Facilities

Management

CONSULTANTS: PROJECT MANAGER:

SHEET NOTES:

Date Checked Drawn

FULLY SPRINKLERED

ACG Project Number

Headquarters:

Apogee Consulting Group, P.A.

1151 Kildaire Farm Road, Suite 120

Cary, North Carolina 27511 www.acg-pa.com 919-858-7420

U.S. Department of Veterans Affairs# © COPYRIGHT Apogee Consulting Group, P.A.

502-16-104

TAMEKA J. TAYLOR

5-15-2020

100% SUBMISSION

17-108

2495 SHREVEPORT HWY. PINEVILLE, LA 71360

REPLACE HVAC SYSTEM

1 HR - FIRE SEPARATION

2 HR - FIRE SEPARATION

SMOKE RESISTIVE HAZARDOUS AREA

S S S S

SWRPLH

MH104

10 21

VA COMMENTS 5/15/20201

Revisions: Date

Drawing Title:

Approved: Project Director

Project Title

Location

VA PROJECT NUMBER

Building Number

Drawing Number

Dwg of

Office of

Construction and Facilities

Management

CONSULTANTS: PROJECT MANAGER:

Date Checked Drawn

FULLY SPRINKLERED

ACG Project Number

Headquarters:

Apogee Consulting Group, P.A.

1151 Kildaire Farm Road, Suite 120

Cary, North Carolina 27511 www.acg-pa.com 919-858-7420

U.S. Department of Veterans Affairs# © COPYRIGHT Apogee Consulting Group, P.A.

# 2

502-16-104

TAMEKA J. TAYLOR

1-9-2020

100% CONSTRUCTION DOCUMENTS

17-108

2495 SHREVEPORT HWY. PINEVILLE, LA 71360

REPLACE HVAC SYSTEM

COOLING COIL

RA

HWS

HWR

V-1

HEATING COIL

CHS

CHR

V-2

T-1

DDC ROOM TEMPERATURE SENSOR/THERMOSTAT, ADJUSTABLE, WALL MOUNTED 48" AFF.

SENSOR SHALL HAVE FAN SPEED ADJUSTMENT CAPABILITIES. PROVIDE BY DDC CONTRACTOR.

T

PC

FILTER

FAN COIL SEQUENCE OF OPERATION

FAN COIL SHALL OPERATE ON A SCHEDULE AS SET BY ECC. FAN SHALL RUN CONTINUOUSLY

IN OCCUPIED MODE. FAN STATUS SHALL BE MONITORED AND AN ALARM MESSAGE SHALL BE

GENERATED IN THE EVENT THE UNIT FAILS TO RUN BETWEEN THE RANGE OF 70°-75° SPACE

TEMPERATURE BOTH V-1 & V-2 SHALL BE CLOSED. UPON RISE IN TEMPERATURE ABOVE 75°

V-2 SHALL MODULATE OPEN TO MAINTAIN 75° F. UPON FALL IN TEMPERATURE BELOW 70° F.

HEATING VALVE V-1 SHALL MODULATE TO OPEN TO MAINTAIN 70° F.

AN OVERFLOW SWITCH SHALL MONITOR THE LEVEL OF WATER IN THE DRAIN PAN. UPON

DETECTION OF HIGH WATER LEVEL, THE SUPPLY FAN SHALL SHUT DOWN, THE COOLING COIL

VALVE SHALL CLOSE, AND AN ALARM SHALL BE ENUNCIATED AT THE ECC.

FAN

CS

TT

HS

SST

PROGRAMMABLE CONTROLLER, PROVIDED BY DDC CONTRACTOR.

POINT NAME:

ZONE TEMPERATURE

ZONE TEMPERATURE SETPOINT

FAN START/STOP

DISCHARGE AIR TEMPERATURE

FAN STATUS

HEATING COIL VALVE

COOLING COIL VALVE

HEATING MODE

SETPOINT TEMPERATURE

HIGH ZONE TEMPERATURE

LOW ZONE TEMPERATURE

HIGH DISCHARGE TEMPERATURE

HARDWARE POINTS

AI AO

X

X

X

X

BI BO

SOFTWARE POINTS

AV BV LOOP SCHED TREND ALARM SHOW ON GRAPHIC

X

X

X

X

X

X

X

X

X

X

X

X

X

X

TOTAL HARDWARE (7) TOTAL SOFTWARE (17)

2 2 3

X

X

9 4 10

X

X

X

X

X

X

MINIMUM OCCUPIED AIR FLOW SETPOINT

MINIMUM UNOCCUPIED AIRFLOW SETPOINT

X

X

X

X

X

X

SST

ERW

OUTSIDE AIR

ZC D-1

D-1

E R

V

P

R E

F

I L T

E R

DPT

DPT-1

TT

T-2

HT

H-2

OUTSIDE AIR TEMPERATURE AND

HUMIDITY SENSORS

TT

T-3

ERV INTAKE

DAMPER

ZC D-2

D-2

AHU INTAKE

DAMPER

FIELD-INSTALLED

DUCTWORK BETWEEN

ERV AND AHU

A F

M D

FT

AF-1

SST

SF1

HS

CS

IT-1

SPD

ALA

VFD

SF1

SF1

ERV SUPPLY FAN

VARIABLE FREQUENCY

DRIVE (TYP.)

PH

PH-1

TT

T-4

H

HUMIDIFIER

ZC

HC-1

V-2

C O

O L I N

G

CHS

V-3

CHR

TT

T-6

RH

RH-1

LPC

LPS

V-1

P R

E H

E A

T

SST

SF2

HS

CS

IT-2

SPD

ALA

VFD

SF2

SF2

AHU SUPPLY FAN

ARRAY

ONE (1) VFD FOR EACH

FAN IN THE ARRAY

P R

E F

I L T

E R

DPT

DPT-2

P R

E F

I L T

DPT

DPT-3

TT

T-5

TT

T-7

HT

H-3

SD

INSTALL IN DUCTWORK

DOWNSTREAM OF AHU

SUPPLY AIR

PSH

PRESSURE SWITCH HIGH TO DISABLE

SUPPLY FANS IN AHU AND ERV WHEN

HIGH PRESSURE LIMIT SETPOINT IS

REACHED

TT

T-1

HT

H-1

PSL

A F

M D

FT

AF-2

PRESSURE SWITCH LOW TO DISABLE

EXHAUST FAN IN ERV WHEN LOW

PRESSURE LIMIT SETPOINT IS

REACHED

INSTALL IN EHAUST

DUCTWORK

UPSTREAM OF ERV

EXHAUST AIR

(FROM

BUILDING)

E X

H A

U S

T

F

I L T

E R

DPT

DPT-4

DPT

DPT-5

EXHAUST

FAN

SST

EF1

HS

CS

IT-3

SPD

ALA

VFD

EF1

EF1

ZC D-3

D-3

ERV EXHAUST

(DISCHARGE)

DAMPER

CS

IT-4

CURRENT

TRANSMITTER FOR

FAN STATUS (TYP. 3)

CURRENT TRANSMITTER FOR

ENERGY WHEEL STATUS

SYSTEM: 2-ERV-1 WITH 2-AH-1; 2-ERV-2

WITH 2-AH-2

POINT LEGEND

SYSTEM

OUTPUTS

BINARY

ANA-

LOG

BINARY ANALOG

SYSTEM INPUTS SYSTEM SOFTWARE/CONTROL

APPLICATION/FUNCTION

ALARM

PROCESSING

REMARKS:

SYSTEM COMPONENT:

EXHAUST AIRFLOW (CFM)

EXHAUST FILTER DIFFERENTIAL PRESSURE

ENERGY WHEEL DIFFERENTIAL PRESSURE

EXHAUST AIR DISCHARGE TEMPERATURE

EXHAUST AIR TEMPERATURE

ENERGY WHEEL STATUS

AHU SUPPLY FAN STATUS (PER FAN)

ERV SUPPLY FAN VSMC

OUTSIDE AIR DAMPER OPEN/CLOSE

AI-3

AI-4

AI-5

AI-6

BI-1

BI-4

AO-1

BO-1

AF-2

DPT-4

DPT-5

T-8

T-1

IT-4

IT-2

SPD-SF1

D-1

P

O

I

N

T

I

D

A

B

B

R

E

V

I

A

T

I

O

N

P

R

I

O

R

I

T

Y

A

A

L

T

E

E

L

E

C

T

R

C

V

I

C

E

S

T

A

R

T

S

T

O

P

O

P

E

N

C

L

O

S

E

S

P

E

O

M

M

A

N

D

V

A

L

V

P

S

I

T

I

O

N

D

A

M

P

S

I

T

I

O

N

S

T

A

T

U

S

A

L

A

R

M

P

R

E

S

S

U

R

E

H

I

G

H

U

M

I

D

I

T

Y

H

I

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A

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S

S

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W

M

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B

M

N

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X

I

D

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H

U

M

I

D

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Y

V

A

C

U

U

M

L

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C

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A

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A

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M

A

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A

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H

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W

M

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C

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D

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A

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T

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P

F

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D

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C

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M

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N

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I

Z

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N

T

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A

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O

N

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I

Z

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T

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M

P

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R

A

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U

S

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T

D

E

M

A

M

I

T

I

N

G

T

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M

P

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R

A

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U

V

E

R

R

I

D

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T

A

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F

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F

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N

D

I

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G

REMARKS

FULL COMMUNICATION

AI-1

ENERGY WHEEL SUPPLY HUMIDITY AI-9 H-4

ERV PRE-FILTER DIFFERENTIAL PRESSURE DPT-1AI-7

EXHAUST FAN VSMC ALARM BI-6 ALA-EF1

ERV SUPPLY FAN START/STOP BO-5 SST-SF1

ENERGY WHEEL SUPPLY TEMPERATURE

T-3AI-8

SUPPLY AIRFLOW (CFM)

AI-10

AF-1

PRE-FILTER 1 DIFFERENTIAL PRESSURE

AI-11 DPT-2

PRE-FILTER 2 DIFFERENTIAL PRESSURE

AI-12 DPT-3

EXHAUST FAN STATUS BI-2 IT-3

ERV SUPPLY FAN STATUS BI-3 IT-1

DUCT SMOKE DETECTOR

BI-5 SD

EXHAUST FAN VSMC AO-2 SPD-EF1 FULL COMMUNICATION

EXHAUST AIR HUMIDITY H-1AI-2

ERV SUPPLY FAN VSMC ALARM

BI-7 ALA-SF1

PREHEAT VALVE BO-8 V-1

HUMIDIFIER VALVE

AO-4

V-2

EXHAUST FAN START/STOP BO-6 SST-EF1

AHU SUPPLY FAN START/STOP (EACH FAN)

BO-7 SST-SF2

COOLING VALVE AO-5 V-3

TT

T-8

HT

H-4

PREHEAT TEMPERATURE

AI-13 T-4

PSL

HT

H-5

HUMIDIFIER TEMPERATURE

AI-14 T-5

HUMIDIFIER HUMIDITY

AI-15 H-5

REHEAT TEMPERATURE

AI-16 T-6

DISCHARGE AIR TEMPERATURE

AI-17 T-7

DISCHARGE AIR HUMIDITY

AI-18 H-3

AHU SUPPLY FAN VSMC ALARM (PER FAN)

BI-8 ALA-SF2

OUTSIDE AIR DAMPER END SWITCH

BI-9 D-1

AHU DAMPER END SWITCH

BI-10 D-2

EXHAUST AIR DAMPER END SWITCH

BI-11 D-3

REHEAT VALVE (EACH) AO-6 V-4 AND V-5

AHU SUPPLY FAN VSMC (EACH FAN) AO-7 SPD-SF2

FULL COMMUNICATION

SUPPLY AIR DAMPER OPEN/CLOSE BO-2 D-2

EXHAUST AIR DAMPER OPEN/CLOSE BO-3 D-3

ENERGY WHEEL START/STOP BO-4 SST-ERW

1. 2-ERV-1 WITH 2-AH-1 AND 2-ERV-2 WITH 2-AH-2 CONTROL SEQUENCE

1.1. FAN OPERATION: ERV SUPPLY FAN, AHU SUPPLY FANS, AND ERV EXHAUST FAN SHALL

OPERATE CONTINUOUSLY DURING BUILDING OCCUPIED HOURS. FANS SHALL BE

DE-ENERGIZED DURING BUILDING UNOCCUPIED HOURS. PRIOR TO FANS ENERGIZING,

THE OUTSIDE AIR DAMPER (D-1), SUPPLY AIR DAMPER (D-2), AND EXHAUST AIR DAMPER

(D-3) SHALL FULLY OPEN, AND SHALL BE PROVEN OPEN BY THEIR RESPECTIVE END

SWITCHES. DAMPERS SHALL CLOSE AFTER THE STATUS OF ALL FANS IS "OFF" FOR A

MINIMUM TIME OF 15 SECONDS (ADJUSTABLE. OCCUPIED AND UNOCCUPIED MODES

SHALL BE DETERMINED BY THE ECC.

1.2. COOLING/HEATING MODES AND ENERGY WHEEL OPERATION:

1.2.1. THE ENERGY WHEEL SHALL ROTATE AT FULL SPEED WHENEVER THE FANS ARE

OPERATIONAL. IF THE WHEEL FAILS TO ROTATE UPON A COMMAND TO ENERGIZE,

AN ALARM SHALL ANNUNCIATE AT THE ECC.

1.2.2. THE SUPPLY AIR TEMPERATURE SETPOINT (T-7) SHALL BE 55°F (ADJUSTABLE)

WHEN THE OUTSIDE AIR TEMPERATURE AS MEASURED BY T-2 IS GREATER THAN

OR EQUAL TO 80°F (ADJUSTABLE), 70°F (ADJUSTABLE) WHEN THE OUTSIDE AIR

TEMPERATURE IS LESS THAN OR EQUAL TO 52°F (ADJUSTABLE), AND SHALL RESET

LINEARLY BETWEEN 52°F AND 80°F OUTSIDE AIR TEMPERATURE (ADJUSTABLE).

WHEN THE TEMPERATURE ENTERING THE CHILLED WATER COIL, MEASURED BY

T-5, IS GREATER THAN THE SETPOINT, THE CHILLED WATER CONTROL VALVE (V-3)

SHALL MODULATE TO MAINTAIN DISCHARGE AIR TEMPERATURE SETPOINT. WHEN

THE TEMPERATURE ENTERING THE PREHEAT COIL, AS MEASURED BY T-4, IS LESS

THAN THE SETPOINT, THE PREHEAT COIL CONTROL VALVE (V-1) SHALL OPEN

FULLY, AND THE FACE AND BYPASS DAMPERS (D-4) SHALL MODULATE TO MAINTAIN

DISCHARGE AIR TEMPERATURE SETPOINT.

1.3. HUMIDITY CONTROL MODES:

1.3.1. DEHUMIDIFICATION: WHEN THE RELATIVE HUMIDITY OF THE EXHAUST AIR COMING

FROM THE BUILDING, AS MEASURED BY H-1, RISES ABOVE 60% (ADJUSTABLE),

SUPPLY AIR TEMPERATURE CONTROL SHALL BE OVERRIDDEN. COOLING COIL

CONTROL VALVE V-3 SHALL MODULATE OPEN TO MAINTAIN TEMPERATURE T-6 AT

A SETPOINT OF 50°F (ADJUSTABLE), AND THE REHEAT COIL CONTROL VALVES (V-4

AND V-5) SHALL MODULATE TO MAINTAIN DISCHARGE HUMIDITY (H-3) SETPOINT OF

50% (ADJUSTABLE). THIS SHALL CONTINUE UNTIL EXHAUST AIR RELATIVE

HUMIDITY FALLS BELOW 55% (ADJUSTABLE).

1.3.2. HUMIDIFICATION: WHEN THE RELATIVE HUMIDITY OF THE EXHAUST AIR COMING

FROM THE BUILDING, AS MEASURED BY H-1, FALLS BELOW 20% (ADJUSTABLE),

HUMIDIFIER STEAM CONTROL VALVE (V-2) SHALL MODULATE TO MAINTAIN

DISCHARGE AIR HUMIDITY (H-3) OF 35% (ADJUSTABLE). THIS SHALL CONTINUE

UNTIL EXHAUST AIR RELATIVE HUMIDITY RISES ABOVE 25% (ADJUSTABLE).

1.4. ECONOMIZER OPERATION:

1.4.1. WHEN THE OUTDOOR AIR ENTHALPY, AS MEASURE BY T-2 AND H-2, IS LESS THAN

OR EQUAL TO THE INDOOR AIR ENTHALPY, AS MEASURED BY T-1 AND H-1, THE

ENERGY WHEEL SHALL STOP AND ALL VALVES SHALL CLOSE.

1.4.2. ECONOMIZER OPERATION SHALL BE DISABLED WHEN:

1.4.2.1. OUTDOOR AIR ENTHALPY EXCEEDS INDOOR AIR ENTHALPY, OR

1.4.2.2. OUTDOOR AIR TEMPERATURE (T-2) EXCEEDS 75°F (ADJUSTABLE), OR

1.4.2.3. OUTDOOR AIR TEMPERATURE (T-2) IS LESS THAN 55°F

1.5. SAFETY CONTROL/PROTECTION:

1.5.1. FREEZE PROTECTION: AVERAGING TEMPERATURE SENSOR T-5 SHALL

DE-ENERGIZE ALL SUPPLY FANS, CLOSE THE OUTSIDE AIR AND SUPPLY AIR

DAMPER, CLOSE THE CHILLED WATER COOLING COIL VALVE (V-4), AND FULLY

OPEN THE PREHEAT COIL VALVE (V-1) IF ANY PART OF THE SENSOR MEASURES

36°F (ADJUSTABLE) OR BELOW.

1.5.2. UPON DETECTION OF PRODUCTS OF COMBUSTION BY THE SMOKE DETECTOR, ALL

SUPPLY FANS SHALL DE-ENERGIZE, VALVES SHALL CLOSE, AND AND ALARM SHALL

BE ANNUNCIATED TO THE FIRE ALARM SYSTEM AND AT THE ECC.

1.6. OTHER ALARMS:

1.6.1. AN ALARM SHALL ANNUNCIATE AT THE ECC WHEN PRESSURE DROP ACROSS ANY

FILTER OR THE ENERGY WHEEL EXCEEDS THE INITIAL PRESSURE DROP BY 0.5"

W.G. (ADJUSTABLE)

1.6.2. AN ALARM SHALL ANNUNCIATE AT THE ECC WHEN DISCHARGE AIR TEMPERATURE

EXCEEDS 60°F (ADJUSTABLE) OR FALLS BELOW 45°F (ADJUSTABLE).

1.6.3. AN ALARM SHALL ANNUNCIATE AT THE ECC WHEN ANY SUPPLY OR EXHAUST FAN

FAILS TO START OR FAILS DURING OPERATION.

1.6.4. AN ALARM SHALL ANNUNCIATE AT THE ECC WHEN DISCHARGE AIR HUMIDITY

RISES ABOVE 60% (ADJUSTABLE) OR FALLS BELOW 20% (ADJUSTABLE).

1.7. GRAPHICS AND MONITORING: ADD SYSTEMS TO THE EXISTING BUILDING DDC SYSTEM,

SHOWING ALARMS AND OTHER POINTS SHOWN ON THE DRAWINGS AND INCLUDED IN

THE SPECIFICATIONS AND IN ACCORDANCE WITH VA REQUIREMENTS. THE DDC SHALL

MONITOR VFD OPERATIONS AND ALARM CONDITIONS.

1.8. ALL ALARM SETPOINTS SHALL BE ADJUSTABLE. ALL ALARMS SHALL BE ABLE TO BE

SILENCED AND RESET REMOTELY AT THE ECC AND DDC WORKSTATION.

TOTAL ENERGY

RECOVERY WHEEL

CONTROLS DIAGRAMS

SCALE: N.T.S.

FOUR PIPE FAN COIL UNIT CONTROLS

SCALE: N.T.S.

100% OUTSIDE AIR ENERGY RECOVERY UNIT AND AIR HANDLING UNIT CONTROLS

NOTE: PROVIDE AN ANALOG OUTPUT POINT FOR EACH

NEW SIEMENS CONTROL VALVE ON THE THIRD FLOOR.

PLHPLH

M-504

18 21

LPC

LPS

V-5 (1/3)V-4 (2/3)

P R

E H

E A

T

STEAM TO

HUMIDIFIER

DISPERSION

RACKS IN AHU

FCU

FCU

FCU

STEAM CONTROL VALVE CAPACITIES:

1. V-1: 411 LBS/HR (2-AH-1), 372 LBS/HR (2-AH-2)

2. V-2: 127 LBS/HR (2-AH-1), 119 LBS/HR (2-AH-2)

3. V-4: 135 LBS/HR (2-AH-1), 129 LBS/HR (2-AH-2)

4. V-5: 67 LBS/HR (2-AH-1), 65 LBS/HR (2-AH-2)

VALVE V-1 SHALL BE 2-POSITION WITH 24 VOLT ACTUATOR.

ALL OTHER VALVES SHALL BE MODULATING AND HAVE 24

VOLT ACTUATORS.

SST

EF1

HS

CS

IT-3

MOTOR

STARTER

EXHAUST

FAN

SCALE: N.T.S.

MISCELLANEOUS EXHAUST FAN CONTROLS

1. 2-EF-ATTIC (2 FANS) - FANS SHALL BE CONTROLLED BY A SINGLE COOLING THERMOSTAT IN

THE ATTIC. WHEN THE TEMPERATURE IN THE ATTIC RISES ABOVE SETPOINT (ADJUSTABLE

AT THERMOSTAT), THE OUTSIDE AIR INTAKE MOTORIZED DAMPERS AND EXHAUST

MOTORIZED DAMPERS SHALL OPEN, AND THE FANS SHALL ENERGIZE AFTER THE DAMPERS

ARE PROVEN OPEN BY AN END SWITCH. THE ECC SHALL MONITOR THE STATUS OF THE

FANS.

2. 2-EF-BIO AND 2-EF-SLEEP: FAN SHALL BE ENERGIZED WHENEVER THE BUILDING IS

OCCUPIED, AS SCHEDULED BY THE ECC. PRIOR TO THE FAN ENERGIZING, THE EXHAUST

AIR MOTORIZED DAMPER SHALL OPEN AND BY PROVEN OPEN BY AND END SWITCH.

3. 2-EF-ELEC: FAN SHALL BE CONTROLLED BY A COOLING THERMOSTAT IN THE ELECTRICAL

ROOM. WHEN THE TEMPERATURE IN THE ROOM RISES ABOVE SETPOINT (ADJUSTABLE AT

THERMOSTAT), THE OUTSIDE AIR INTAKE MOTORIZED DAMPER AND EXHAUST MOTORIZED

DAMPER SHALL OPEN, AND THE FAN SHALL ENERGIZE AFTER THE DAMPERS ARE PROVEN

OPEN BY AN END SWITCH. THE ECC SHALL MONITOR THE STATUS OF THE FAN.

POINT NAME:

FAN START/STOP (QTY. 2)

FAN STATUS (QTY. 5)

MOTORIZED DAMPER OPEN/CLOSE (QTY. 7)

HARDWARE POINTS

AI AO

X

X

X

BI BO

SOFTWARE POINTS

AV BV LOOP SCHED TREND ALARM SHOW ON GRAPHIC

X

X

X

X

TOTAL HARDWARE (14) TOTAL SOFTWARE (5)

5 5 149

ZC

D-4

FACE AND BYPASS

DAMPERS

FACE AND BYPASS DAMPER AO-3 D-4

CONDENSATE OVERFLOW SWITCH

X X X

2 1

D-4

NOTE: DIAGRAM, SEQUENCE AND POINTS LIST ARE TYPICAL FOR (2) ENERGY

RECOVERY UNITS AND (2) AIR HANDLING UNITS.

NOTE: TYPICAL FOR EACH FAN COIL UNIT.

D U

I G

H

H

H

STEAM

CONDENSATE

RETURN

TEMPERATURE SWITCH

SCALE POCKET

HUMIDIFIER

CONTROL VALVE

TO HUMIDISTAT

MANIFOLD PIPE ADAPTERS

STEAM SUPPLY

ON-OFF CONTROL VALVE

AHU HUMIDIFER SECTION

M

I N m m

INVERTED BUCKET

TRAP

ASSEMBLY

SEE MANUFACTURER'S

PIPING RECOMMENDATIONS

FOR FINAL LAYOUT

SCALE: N.T.S.

AHU STEAM HUMIDIFIER - PIPING CONNECTIONS

(MULTIPLE DISPERSION TUBES)

VA COMMENTS 5/15/20201