36C25618U0323-0002009.pdf

EXISTING DOMESTIC

WATER HEATER

EXISTING

8-AHU-2

EXISTING

8-AHU-1

EXISTING

8-AHU-1

DISCONNECT

EXISTING 8-P-1

EXISTING

8-P-1 VFD

EXISTING

FIRE PANELS

EXISTING

HVAC

CONTROL

PANEL

EXISTING KITCHEN EXHAUST FANS

REPLACE 8-AHU-2 STARTER/

DISCONNECT WITH NEW WET

LOCATION VFD. CONNECT TO

EXIST ELEC.

EXISTING

METASYS

CONTROL

PANEL

EXISTING

JCI

CONTROL

PANEL

EXISTING SIEMENS

CONTROL PANEL

8-AHU-1

8-AHU-1

8-AHU-1

8-AHU-1

EXISTING

KITCHEN HOOD,

HD-1, SERVED BY

8EF#1

NOTES:

1. EXISTING CONTROLS ARE A MIX OF JCI AND

SIEMENS DDC AND PNEUMATIC.

2. EXISTING DDC SENSORS, ACTUATORS, ETC. MUST

BE REPLACED.

3. CONTROLLERS AND SPACE THERMOSTATS SHALL

BE REPLACED. CONNECT TO EXISTING ELECTRICAL

SERVICES.

V F

D

PROVIDE NEW ELEC METER AND

CONNECT TO CAMPUS DDC

CONTROL SYSTEM.

PROVIDE NEW CHILLED WATER,

DOMESTIC WATER AND STEAM

METER PANEL. CONNECT TO

CAMPUS DDC CONTROL SYSTEM.

EXIST MAIN

ELEC PANEL.

PROVIDE NEW STEAM

METER IN SUPPLY PIPING

AND NEW CHW METER IN

RETURN PIPING.

PROVIDE NEW

DOMESTIC WATER

METER.

KEYNOTES:

PROVIDE NEW METER. CONTRACTOR SHALL PROVIDE

120V POWER CONNECTION TO NEW METER.

CONTRACTOR SHALL ROUTE TO NEAREST 120V PANEL

WITH SPARE CAPACITY, INSTALL NEW 20 A-1 POLE

CIRCUIT BREAKER, & MAKE CONNECTION. PROVIDE 20

A SWAP SWITCH AT DDC PANEL FOR DISCONNECT.

CONTRACTOR TO VERIFY 120V PANEL LOCATION

DURING PRE-BID WALKTHROUGH.

V F

D

REPLACE 8-AHU-1 STARTER/

DISCONNECT WITH NEW WET

LOCATION VFD. CONNECT TO

EXIST ELEC.

F E

D C

B G

Alexandria, Louisiana

A&E Design - Upgrade Energy Management Control Systems

October 30, 2013

VA256-12-C-0253

VETERANS HEALTH CARE

SYSTEM

Alexandria, LA

A

U.S. Department of Veterans Affairs

1ST FLOOR PLAN - MECHANICAL

8 WLP NMT

M8-101 10-30-13

OUTSIDE AIR

DPS-1

C H

W R

SUPPLY

COIL

CLG

V-2

NO

VFD

FAN

DI4

DO1

AI8

AO4

DI5DI2AI1

AO1

AI12

AO6

PANEL

DDC CONTROL

AIR FILTER

T-5

NC

D-1

AI2

AO2

NO

D-2

AI5

T-4

T

T-3 H-1

AI4 AI6

L P

S

V-1

NO

AI10

T-7

AI9

AO5

AI11

TYP 3 ZONES

AI13

AO7

AI14

AO8

AI17

T-6

SEQUENCE OF OPERATION

1. GENERAL

1.1. THE AIR HANDLING UNIT IS SCHEDULED FOR AUTOMATIC OPERATION ON A TIME OF DAY BASIS FOR

OCCUPIED AND UNOCCUPIED MODES.

1.2. WITHIN OCCUPIED MODE, THE SYSTEM CAN ENTER THE WARM-UP MODE WHEN THE SPACE

TEMPERATURE IS BELOW SETPOINT OR THE COOL-DOWN MODE WHEN THE SPACE TEMPERATURE IS

ABOVE SETPOINT. THE SYSTEM STAYS IN THE WARM-UP OR COOL-DOWN MODE UNTIL THE MODE

SETPOINT IS SATISFIED.

1.3. WITHIN THE UNOCCUPIED MODE, NIGHT HEATING IS AVAILABLE WHEN THE SPACE TEMPERATURE DROPS BELOW 65°F. THE LATEST START TIME IS THE SCHEDULED OCCUPANCY FOR THE SPACE.

1.4. ALL SUGGESTED SETPOINTS AND SETTINGS ARE ADJUSTABLE.

2. WARM-UP

2.1. THE SUPPLY FAN STARTS. THE MIXING DAMPERS ARE POSITIONED FOR 100% RETURN AIR AND THE COLD DECK COOLING COIL VALVE REMAINS CLOSED. THE HOT DECK HEATING COIL VALVE MODULATES

TO MAINTAIN THE HOT DECK SUPPLY TEMPERATURE SETPOINT.

2.2. IF TIME REACHES THE LATEST START TIME DURING THE WARM-UP MODE, THE OUTDOOR AIR DAMPER

OPENS TO ITS MIN. POSITION.

2.3. THE SYSTEM IS PREVENTED FROM ENTERING THE WARM-UP MODE MORE THAN ONCE PER DAY.

3. COOL-DOWN

3.1. THE SUPPLY FAN STARTS. THE HOT DECK HEATING COIL VALVE REMAINS CLOSED. THE COLD DECK COOLING VALVE AND THE MIXING DAMPERS MODULATE TO MAINTAIN THE COLD DECK SUPPLY AIR

TEMPERATURE AT SETPOINT.

3.2. IF TIME REACHES THE LATEST START TIME DURING THE COOL-DOWN MODE, THE OUTDOOR AIR

DAMPER OPENS TO ITS MIN. POSITION OR IS CONTROLLED IN ECONOMIZER OPERATION.

3.3. THE SYSTEM IS PREVENTED FROM ENTERING COOL-DOWN MODE MORE THAN ONCE PER DAY.

4. OCCUPIED

4.1. THE FAN STARTS OR CONTINUES TO RUN.

4.2. THE HOT DECK HEATING COIL VALVE MODULATES TO MAINTAIN THE HOT DECK SUPPLY AIR

TEMPERATURE SETPOINT.

4.3. THE CHILLED WATER COOLING COIL VALVE MODULATES TO MAINTAIN THE COLD DECK SUPPLY AIR

TEMPERATURE SETPOINT.

5. UNOCCUPIED

5.1. THE FAN IS OFF, THE COLD DECK COOLING COIL VALVE CLOSES, AND MIXING DAMPERS CLOSE TO THE

OUTDOOR AIR. THE HOT DECK HEATING COIL VALVE OPENS.

6. NIGHT HEATING

6.1. THE SUPPLY FAN STARTS WITH THE HOT DECK HEATING COIL VALVE OPEN TO MAINTAIN A MIN. SPACE TEMPERATURE OF 65°F IN ANY OF THE ZONES. THE COLD DECK COOLING COIL VALVE REMAINS CLOSED

AND THE MIXING DAMPERS REMAIN CLOSED TO OUTDOOR AIR.

7. ZONE CONTROL

7.1. EACH ZONE HOT DECK AND COLD DECK DAMPERS SHALL MAINTAIN SPACE TEMPERATURE SEPOINT.

ZONE AIRFLOW SHALL BE MAINTAINED BETWEEN MINIMUM AND MAXIMUM VALUES. SIMULTANIOUS

HEATING AND COOLING SHALL ONLY BE ALLOWED WITH ZONE AIRFLOW AT MIN.

7.2. THE VFD SHALL MAINTAIN MAXIMUM OPEN HEATING OR COOLING DAMPER AT 95% OPEN.

8. ALARMS

8.1. WHEN THE OAT IS LESS THAN 45°F, THE HOT DECK HEATING COIL VALVE MODULATES TO MAINTAIN THE HOT DECK AIR TEMPERATURE AT 45°F AND THE COLD DECK COOLING VALVE OPENS. WHEN THE OAT IS 45°F OR ABOVE, THE HOT DECK HEATING VALVE AND THE COLD DECK COOLING VALVE CLOSE. ALL

OTHER DAMPERS AND VALVES POSITION TO THEIR NORMAL POSITIONS AFTER THE FAN IS

EN-ENERGIZED.

8.2. A LOW TEMPERATURE DETECTOR IN THE DISCHARGE OF THE HEATING COIL DE-ENERGIZES THE SUPPLY FAN WHEN TEMPERATURES BELOW 38°F ARE SENSED. THE HOT DECK HEATING COIL VALVE MODULATES TO MAINTAIN THE HOT DECK AIR TEMPERATURE AT 45°F AND THE COLD DECK COOLING VALVE OPENS. ALL OTHER DAMPERS AND VALVES POSITION TO THEIR NORMAL POSITIONS AFTER THE

FAN IS DE-ENERGIZED.

8.3. THE DDC SYSTEM GENERATES AN ALARM IF STATUS DEVIATES FROM DDC START/STOP CONTROL.

KEYNOTES:

EXIST DDC CONTROL DEVICE TO BE REPLACED.

EXISTING PNEUMATIC CONTROL DEVICE TO BE REPLACED WITH DDC

DEVICE.

EXIST CONTROL DEVICE TO BE REPLACED. CONNECT TO EXISTING

ELECTRICAL SERVICES.

NEW CHILLED WATER VALVE TO BE 2-WAY. REPLACE TEE IN SUPPLY PIPE

WITH STRAIGHT PIECE OF PIPE.

PROVIDE NEW DDC AHU CONTROLLER.

NEW DDC DEVICE.

SEPARATE HOT DECK AND COLD DECK DAMPER RODS FOR INDEPENDENT

CONTROL.

PROVIDE NEW AIR FLOW METER IN EXISTING SA DUCTWORK. FIELD VERIFY

DUCT DIMENSIONS.

DI1

T-2

AI3

T-1

1 1

1 1

SD-1

SD-2

OUTSIDE AIR DAMPER (D-1) CONTROLLERAO1

CHILLED WATER CONTROL VALVE (V-1)

AO2

AO3

STEAM CONTROL VALVE (V-2)

AO4

AO5

AO6 ZONE 1 COLD DECK DAMPER (D-3) CONTROLLER

ZONE 2 COLD DECK DAMPER (D-4) CONTROLLER

SUPPLY FAN START/STOPDO1

AI2

AI1

AI3

AI4

AI6

AI7

AI5

AI8

AI10

AI11

AI9

AI12

AI13

AI14

AI15 ZONE 1 SUPPLY AIR DISCHARGE TEMPERATURE SENSOR (T-8)

ZONE 2 SUPPLY AIR DISCHARGE TEMPERATURE SENSOR (T-9)

ZONE 3 SUPPLY AIR DISCHARGE TEMPERATURE SENSOR (T-10)

FILTER STATUS (DPS-1)DI2

DI3

DI1 HIGH LIMIT TEMPERATURE SENSOR (T-2) STATUS

RETURN AIR SMOKE DETECTOR (SD-1) STATUS

F E

D C

B G

Alexandria, Louisiana

A&E Design - Upgrade Energy Management Control Systems

October 30, 2013

VA256-12-C-0253

VETERANS HEALTH CARE

SYSTEM

Alexandria, LA

A

U.S. Department of Veterans Affairs

H

T T T T T

T

HTG

COIL

DI3

DI6

T-11

AI18

T T-12

AI19

T-13

AI20

T T

ZONE 2 THERMOSTAT

ZONE 3 THERMOSTAT

ZONE 1 THERMOSTAT

1 1 1

D-3 T-8

T-9

T-10 D-4

D-5

AI15

AI16

AI16

AI17

AI18 ZONE 1 AIR TEMPERATURE SENSOR (T-11)

ZONE 2 AIR TEMPERATURE SENSOR (T-12)

SUPPLY FAN STATUS

DI5

DI6

DI4

LOW LIMIT TEMPERATURE SENSOR (T-5) STATUS

SUPPLY SMOKE DETECTOR (SD-2) STATUS

T

AI19

ZONE 3 AIR TEMPERATURE SENSOR (T-13)

ZONE 1 COLD DECK DAMPER (D-3)

ZONE 2 COLD DECK DAMPER (D-4)

ZONE 3 COLD DECK DAMPER (D-5)

COLD DECK TEMPERATURE SENSOR (T-7)

HOT DECK TEMPERATURE SENSOR (T-6)

STEAM CONTROL VALVE (V-3)

CHILLED WATER CONTROL VALVE (V-2)

PRE-FILTERED MIXED AIR TEMPERATURE SENSOR (T-1)

RETURN AIR TEMPERATURE SENSOR (T-3)

RETURN AIR HUMIDITY SENSOR (H-1)

OUTSIDE AIR DAMPER (D-1)

RETURN AIR DAMPER (D-2)

FILTERED MIXED AIR TEMPERATURE SENSOR (T-4)

AO7

ZONE 3 COLD DECK DAMPER (D-5) CONTROLLER

RETURN AIR DAMPER (D-2) CONTROLLER

8-AHU-01 CONTROL SCHEMATIC

& SEQUENCE

8 WLP NMT

M8-200

D-6

D-7

D-8

AI21

AO9

AI22

AO10

AI23

AO11

F-1

AI24

AI25

AI26

F-2 F-3

AI20

ZONE 1 HOT DECK DAMPER (D-6)AI21

ZONE 2 HOT DECK DAMPER (D-7)AI22

ZONE 3 HOT DECK DAMPER (D-8)AI23

ZONE 1 AIR FLOW METER (F-1)AI24

ZONE 2 AIR FLOW METER (F-2)AI25

ZONE 3 AIR FLOW METER (F-3)

AO8

ZONE 1 HOT DECK DAMPER (D-6) CONTROLLERAO9

ZONE 2 HOT DECK DAMPER (D-7) CONTROLLER

AO10

ZONE 3 HOT DECK DAMPER (D-8) CONTROLLER

NOTES:

1. TEST AND BALANCE ALL AIR FLOWS TO AHU, FCU, VAV BOXES

(MAX. AND MIN.), ETC PRIOR TO STARTING WORK. PROVIDE

REPORT TO VA. BALANCE ALL AIR FLOWS TO

PRE-CONSTRUCTION VALUES.

AI7

AO3

AI26

SUPPLY FAN VFD SPEED

AO11

SUPPLY FAN VFD SPEED

F E

D C

B G

Alexandria, Louisiana

A&E Design - Upgrade Energy Management Control Systems

October 30, 2013

VA256-12-C-0253

VETERANS HEALTH CARE

SYSTEM

Alexandria, LA

A

U.S. Department of Veterans Affairs

SUPPLY

VFD

FAN

DO1

DI4

COIL

C H

W R

V-2

NO

CLG

AI7

AO4AO1

AI1 AI4

SUPPLY

PANEL

DDC CONTROL

AI5

T-3

T-2

OUTSIDE AIR

D-1

AI3

RETURN AIRH-1

L P

S

COIL

HTG

V-3

NC

AI8

AO5

AI9

T-5

AIR

FILTER

DI1

T-1

AI2

AO2

NOD-2

NC

S T

M

COIL

HTG

V-1

NC

AI6

AO3

DI5

SD-2

DI2

SD-1

ZONE THERMOSTAT SENSOR

T-7

AI10

T

ZONE OCCUPANCY SENSOR

OCC-1

AI12

OCC

SEQUENCE OF OPERATION

1. GENERAL

1.1. THE AIR HANDLING UNIT IS SCHEDULED FOR AUTOMATIC OPERATION ON A TIME OF DAY BASIS FOR

OCCUPIED AND UNOCCUPIED MODES.

1.2. WITHIN OCCUPIED MODE, THE SYSTEM CAN ENTER THE WARM-UP MODE WHEN THE SPACE TEMPERATURE IS BELOW SETPOINT OR THE COOL-DOWN MODE WHEN THE SPACE TEMPERATURE IS ABOVE SETPOINT.

THE SYSTEM STAYS IN THE WARM-UP OR COOL-DOWN MODE UNTIL THE MODE SETPOINT IS SATISFIED.

1.3. WITHIN THE UNOCCUPIED MODE, NIGHT HEATING IS AVAILABLE WHEN THE SPACE TEMPERATURE DROPS

BELOW 65°F. THE LATEST START TIME IS THE SCHEDULED OCCUPANCY FOR THE SPACE.

1.4. PRE-HEAT STEAM VALVE, V-1, SHALL MODULATE TO MAINTAIN PRE-HEAT DISCHARGE AIR TEMPERATURE

BETWEEN 45°F AND 55°F.

1.5. ALL SUGGESTED SETPOINTS AND SETTINGS ARE ADJUSTABLE.

2. WARM-UP

2.1. THE SUPPLY FAN STARTS. THE MIXING DAMPERS ARE POSITIONED FOR 100% RETURN AIR AND THE PREHEAT COIL AND COOLING COIL VALVES REMAIN CLOSED. THE HEATING COIL VALVE MODULATES TO

MAINTAIN THE SUPPLY AIR TEMPERATURE SETPOINT.

2.2. IF TIME REACHES THE LATEST START TIME DURING THE WARM-UP MODE, THE OUTDOOR AIR DAMPER

OPENS TO ITS MIN. POSITION.

2.3. THE SYSTEM IS PREVENTED FROM ENTERING THE WARM-UP MODE MORE THAN ONCE PER DAY.

3. COOL-DOWN

3.1. THE SUPPLY FAN STARTS. THE PREHEAT COIL AND HEATING COIL VALVES REMAIN CLOSED. THE COLD

DECK COOLING VALVE AND THE MIXING DAMPERS MODULATE TO MAINTAIN THE SUPPLY AIR

TEMPERATURE AT SETPOINT. WHEN THE OUTSIDE AIR DRY BULB TEMPERATURE IS ABOVE THE

ECONOMIZER CHANGEOVER VALUE, THE MIXING DAMPERS ARE POSITIONED FOR 100% RETURN AIR.

3.2. IF TIME REACHES THE LATEST START TIME DURING THE COOL-DOWN MODE, THE OUTDOOR AIR DAMPER

OPENS TO ITS MIN. POSITION OR IS CONTROLLED IN ECONOMIZER OPERATION.

3.3. THE SYSTEM IS PREVENTED FROM ENTERING COOL-DOWN MODE MORE THAN ONCE PER DAY.

4. OCCUPIED

4.1. WHEN OA DEWPOINT IS GREATER THAN 55°F, CHILLED WATER COIL LEAVING AIR TEMPERATURE SHALL BE MAINTAINED AT 55°F AS SENSED BY T-3 BY MODULATING CHILLED WATER VALVE, V-2. SPACE TEMPERATURE SETPOINT SHALL BE MAINTAINED BY MODULATING FAN VFD BETWEEN MIN. SPEED OF 30% (ADJ) MAX. SPEED OF 100%. WITH THE FAN AT MINIMUM SPEED, UPON A CALL FOR HEATING THE REHEAT VALVE WILL MODULATE, WITH AND UPPER LIMIT SUPPLY AIR TEMPERATURE AS SENSED T-5 OF 95°F.

4.2. WHEN OA DEW POINT TEMPERATURE IS LESS THAN OR EQAUL TO 55° THE VFD SPEED SHALL BE AT MIN SPEED OF 30% (ADJ.). SPACE TEMPERATURE SHALL BE MAINTAINED AT COOLING OR HEATING SETPOINT BY MODULATING THE CHILLED WATER VALVE, V-2, OR RE-HEAT VAVLE, V-3, RESPECTIVELY. IF EITHER VALVE IS 100% OPEN AND ADDITIONAL COOLING OR HEATING IS REQUIRED, VFD SPEED SHALL INCREASE

TO MAINTING SPACE TEMPERATURE SETPOINT.

5. UNOCCUPIED (NORMAL OFF)

5.1. THE SUPPLY FAN STOPS, THE COOLING COIL VALVE CLOSES AND THE MIXING DAMPERS CLOSE TO THE OUTDOOR AIR. IF THE OAT IS LESS THAN 45°F, THE HEATING COIL VALVE MODULATES TO MAINTAIN THE UNOCCUPIED SUPPLY AIR SETPOINT. IF THE OAT IS 45° OR ABOVE, THE HEATING COIL VALVE CLOSES.

6. HUMIDITY

6.1. MIXED AIR %RH IS TRANSMITTED TO THE ECC BY H-1.

6.2. WHEN RETURN HUMIDITY RISES ABOVE 60% RH AS SENSED BY SPACE HUMIDISTAT, H-2, VFD SPEED SHALL BE 100%, CHILLED WATER VALVE, V-2, SHALL MODULATE TO MAINTAIN CHILLED WATER COIL LAT, T-3, SHALL BE 55°F, AND REHEAT VALVE, V-1, SHALL MODULATE TO MAINTAIN SPACE TEMPERATURE SETPOINT.

WHEN SPACE HUMIDITY REACHES 50% RH NORMAL OPERATION SHALL RESUME.

7. NIGHT HEATING

7.1. THE SUPPLY FAN STARTS WITH THE HEATING COIL VALVE OPEN TO MAINTAIN A MIN. SPACE TEMPERATURE OF 65°F. THE COOLING COIL VALVE IS CLOSED AND THE MIXING DAMPERS CLOSE TO OUTDOOR AIR.

8. ALARMS

8.1. SMOKE DETECTORS IN THE SUPPLY AND RETURN AIR STREAMS DE-ENERGIZE THE SUPPLY FAN UPON ACTIVATION. WHEN THE OAT IS LESS THAN 45°F, THE HEATING COIL VALVE MODULATES TO MAINTAIN THE MIXED AIR TEMPERATURE AT 45°F. WHEN THE OAT IS 45°F OR ABOVE, THE HEATING COIL VALVE CLOSES.

ALL OTHER DAMPERS AND VALVES POSITION TO THEIR NORMAL POSITIONS AFTER THE FAN IS

EN-ENERGIZED.

8.2. A LOW TEMPERATURE DETECTOR IN THE DISCHARGE OF THE HEATING COIL DE-ENERGIZES THE SUPPLY FAN WHEN TEMPERATURES BELOW 38°F ARE SENSED. THE HEATING COIL VALVE MODULATES TO MAINTAIN THE MIXED AIR TEMPERATURE AT 45°F. ALL OTHER DAMPERS AND VALVES POSITION TO THEIR NORMAL

POSITIONS AFTER THE FAN IS DE-ENERGIZED.

8.3. A CURRENT SWITCH IS INSTALLED IN THE SUPPLY FAN STARTER. THE DDC SYSTEM USES THIS SWITCH TO CONFIRM THE FAN IS IN THE DESIRED STATE (I.E. ON OR OFF) AND GENERATES AN ALARM IF STATUS

DEVIATES FROM DDC START/STOP CONTROL.

KEYNOTES:

EXIST DDC CONTROL DEVICE TO BE REPLACED.

EXISTING PNEUMATIC CONTROL DEVICE TO BE REPLACED WITH DDC

DEVICE.

NEW CHILLED WATER VALVE TO BE 2-WAY. REPLACE TEE IN RETURN PIPE

WITH STRAIGHT PIECE OF PIPE.

PROVIDE NEW DDC AHU CONTROLLER. CONNECT NEW CONTROLLER TO

EXISTING ELECTRICAL SERVICE.

NEW DDC DEVICE.

2 2

DI3

T-4

1 1

5 5

OUTSIDE AIR DAMPER (D-1) CONTROLLERAO1

MEDIUM PRESSURE STEAM CONTROL VALVE (V-1)

AO2

AO3

CHILLED WATER CONTROL VALVE (V-2)AO4

AO5 LOW PRESSURE STEAM CONTROL VALVE (V-3)

SUPPLY FAN START/STOPDO1

AI2

AI1

AI3

AI4

AI6

AI7

AI5

AI8

AI10

AI11

AI9

AI12

RETURN AIR SMOKE DETECTOR (SD-1) STATUSDI2

DI3

DI1 MIXED AIR LOW LIMIT TEMPERATURE SENSOR (T-1)

LPS HEATING COIL DISCHARGE LOW LIMIT TEMPERATURE SENSOR (T-4) STATUS

SUPPLY FAN STATUS

DI5

DI4

SUPPLY AIR DISCHARGE SMOKE DETECTOR (SD-2) STATUS

NOT USED

ZONE OCCUPANCY SENSOR (OCC-1)

SUPPLY AIR DISCHARGE TEMPERATURE SENSOR (T-5)

ZONE TEMPERATURE SENSOR (T-7)

LOW PRESSURE STEAM RE-HEAT CONTROL VALVE (V-3)

CHILLED WATER CONTROL VALVE (V-2)

RETURN AIR TEMPERATURE SENSOR (T-2)

RETURN AIR HUMIDITY SENSOR (H-1)

MEDIUM PRESSURE STEAM PRE-HEAT CONTROL VALVE (V-1)

OUTSIDE AIR DAMPER (D-1)

RETURN AIR DAMPER (D-2)

MIXED AIR TEMPERATURE SENSOR (T-3)

RETURN AIR DAMPER (D-2) CONTROLLER

T H

T T T T

8-AHU-02 CONTROL SCHEMATIC

& SEQUENCE

8 WLP NMT

M8-201

AI13

AO6

AI13 SUPPLY FAN VFD SPEED

AO6 SUPPLY FAN VFD SPEED

AI14

T-6

T

AI14 COOLING COIL DISCHARGE AIR TEMPERATURE (T-6)

NOTES:

1. TEST AND BALANCE ALL AIR FLOWS TO AHU, FCU, VAV BOXES

(MAX. AND MIN.), ETC PRIOR TO STARTING WORK. PROVIDE

REPORT TO VA. BALANCE ALL AIR FLOWS TO

PRE-CONSTRUCTION VALUES.

AI15

T-8

T

AI15 PRE-HEAT COIL DISCHARGE AIR TEMPERATURE (T-7)

VFD

1-CHW P-1

P

SEQUENCE OF OPERATION

1. GENERAL

1.1. THE SECONDARY CHILLED WATER SYSTEM CONSISTS OF ONE CHILLED WATER PUMP (1-CHW P-1) WITH A VARIABLE FREQUENCY DRIVE (VFD). THE SYSTEM IS DDC CONTROLLED WITH ELECTRIC ACTUATION.

2. SECONDARY CHILLED WATER PUMP CONTROL

2.1. WHEN COOLING IS REQUIRED, THE SECONDARY CHILLED WATER PUMP STARTS. THE VFD MODULATES PUMP SPEED TO MAINTAIN SYSTEM DIFFERENTIAL PRESSURE OF 20 PSI AS SENSED NEAR THE END OF

THE SECONDARY PIPING RUN.

F E

D C

B G

Alexandria, Louisiana

A&E Design - Upgrade Energy Management Control Systems

October 30, 2013

VA256-12-C-0253

VETERANS HEALTH CARE

SYSTEM

Alexandria, LA

A

U.S. Department of Veterans Affairs

CAMPUS

CHWS

CAMPUS

CHWR

BLDG. 8

CHWR

AHU-8-1&2

CHWS

T

AI1

T

AI3

AI2

AO1 DO1

DI1

AI4

AI2

AI1

AI3

AI4

DI1 CHILLED WATER PUMP (1-CHW P-1) STATUS ?

BLDG. 8 CHILLED WATER RETURN TEMPERATURE SENSOR

DIFFERENTIAL PRESSURE SENSOR

CAMPUS CHILLED WATER SUPPLY TEMPERATURE SENSOR

CHILLED WATER PUMP (1-CHW P-1) VFD STATUS ?

CHILLED WATER PUMP (1-CHW P-1) VFD SPEED ?AO1

SUPPLY FAN START/STOPDO1

NOTES:

1. EXISTING PNEUMATIC CONTROL DEVICE TO BE REPLACED

WITH NEW DDC DEVICE.

2. PROVIDE NEW DDC CONTROLLER. CONNECT NEW

CONTROLLER TO EXISTING ELECTRICAL SERVICE.

NOTES:

1. ALL CONTROL DEVICES ARE EXISTING DDC. VFD MAY BE

REUSED IF FUNCTIONAL AND COMPATIBLE. SENSORS MUST

BE REPLACED.

2. CONTROLLER SHALL BE REPLACED. CONNECT NEW

CONTROLLER TO EXISTING ELECTRICAL SERVICE.

STEAM CONV.

STEAM

SUPPLY

AI1

AO1

CONDENSATE

RETURN

D H

W S

SEQUENCE OF OPERATION

1. GENERAL

1.1. THE DOMESTIC HOT WATER SYSTEM IS ENABLED CONTINUOUSLY.

2. DOMESTIC HOT WATER CONVERTER CONTROL

2.1. STEAM CONTROL VAVLE V-1 SHALL MODULATE TO MAINTAIN A DOMESTIC HOT WATER SUPPLY

TEMPERATURE SETPOINT OF 150°F (ADJUSTABLE).

AI2

AI1 STEAM CONTROL VAVLE V-1

DOMESTIC HOT WATER SUPPLY TEMPERATURE

STEAM CONTROL VALVE V-1AO1

D C

W S

T

AI2

SCHWS & DOMESTIC HOT WATER

SYSTEM CONTROL SCHEMATIC

& SEQUENCE

8 WLP NMT

M8-202

EXIST 9-CHWP-1

EXIST 9-CHWP-2

EXIST 9-CP-1

EXIST 9-HWHP-3

EXIST 9-HWHP-4

EXIST 9-C-1 & 9-C-2

STACKED ON TOP OF

EACH OTHER

DEMO EXIST CONTROL

AIR COMPRESSOR

EXIST

9-WH-1

EXIST

9-WH-2

EXIST

V9-3-1

EXIST

V9-3-2

EXIST

V9-3-5

EXIST

V9-3-6

EXIST

V9-3-7

EXIST

V9-3-3

EXIST

V9-3-4

EXIST

V9-3-8

EXIST

FCU#9-4

EXIST

FCU#9-3

EXIST

FCU#9-1

EXIST

FCU#9-2

KEYNOTES:

EXISTING FCU-A: FAN CFM, 190; OA CFM, 15; CHW

GPM, 1.4; HW GPM, 0.5.

EXISTING FCU-B: FAN CFM, 300; OA CFM, 20; CHW

GPM, 2.1; HW GPM, 1.0.

EXISTING FCU-C: FAN CFM, 400; OA CFM, 30; CHW

GPM, 2.8; HW GPM, 1.0.

EXISTING FCU-D: FAN CFM, 600; OA CFM, 40; CHW

GPM, 4.0; HW GPM, 1.0.

EXISTING FCU-F: FAN CFM, 1000; OA CFM, 60; CHW

GPM, 6.2; HW GPM, 1.6.

A

B

C

D

A

F

F C

D

D

B

B

B B B

B

B

A

C

A

B

B

B

B D

B

AA

EXIST ELEC AND MECHANICAL

METER ENCLOSURES. CONNECT

TO CAMPUS DDC CONTROL

SYSTEM.

EXIST 16-502-9-PW-1

EXIST STEAM METER

(16-502-9-ST-1)

EXIST CHILLED WATER METER

(16-502-9-CHW-1)

EXIST 1/8 HP EXHAUST FAN

(9EF-5) TO REMAIN ON

STANDALONE CONTROLS

EXIST

ABANDONED

EXHAUST FAN.

EXIST ABANDONED

EXHAUST FAN. EXIST PNEUMATIC DUCT

DAMPER. REPLACE

ACTUATOR AND

THERMOSTAT WITH DDC.

EXIST PNEUMATIC

SMOKE DAMPER

TO BE

CONVERTED TO

DDC CONTROL.

(TYP.)

V F

D V

F D

PROVIDE NEW 10 HP VFD'S FOR CHILLED WATER

PUMPS. CONNECT TO EXIST ELEC SERVICE.

F E

D C

B G

Alexandria, Louisiana

A&E Design - Upgrade Energy Management Control Systems

October 30, 2013

VA256-12-C-0253

VETERANS HEALTH CARE

SYSTEM

Alexandria, LA

A

U.S. Department of Veterans Affairs

1ST FLOOR PLAN - MECHANICAL

9 WLP NMT

M9-101

B

B

B

B

D

B

B

B B B

B

B

B

B

B

A

C

C

C

B B

B C

A

D

A

D

D

E

KEYNOTES:

EXISTING FCU-A: FAN CFM, 190; OA CFM, 15; CHW

GPM, 1.4; HW GPM, 0.5.

EXISTING FCU-B: FAN CFM, 300; OA CFM, 20; CHW

GPM, 2.1; HW GPM, 1.0.

EXISTING FCU-C: FAN CFM, 400; OA CFM, 30; CHW

GPM, 2.8; HW GPM, 1.0.

EXISTING FCU-D: FAN CFM, 600; OA CFM, 40; CHW

GPM, 4.0; HW GPM, 1.0.

EXISTING FCU-E: FAN CFM, 800; OA CFM, 50; CHW

GPM, 5.1; HW GPM, 1.2.

EXISTING FCU-F: FAN CFM, 1000; OA CFM, 60; CHW

GPM, 6.2; HW GPM, 1.6.

A

B

C

D

E

F

F E

D C

B G

Alexandria, Louisiana

A&E Design - Upgrade Energy Management Control Systems

October 30, 2013

VA256-12-C-0253

VETERANS HEALTH CARE

SYSTEM

Alexandria, LA

A

U.S. Department of Veterans Affairs

2ND FLOOR PLAN - MECHANICAL

9 WLP NMT

M9-102

C

E C

B

B B B

B

B

B

B

B

A

B

B D

B B

C

D C

A

C

C

C

KEYNOTES:

EXISTING FCU-A: FAN CFM, 190; OA CFM, 15; CHW

GPM, 1.4; HW GPM, 0.5.

EXISTING FCU-B: FAN CFM, 300; OA CFM, 20; CHW

GPM, 2.1; HW GPM, 1.0.

EXISTING FCU-C: FAN CFM, 400; OA CFM, 30; CHW

GPM, 2.8; HW GPM, 1.0.

EXISTING FCU-D: FAN CFM, 600; OA CFM, 40; CHW

GPM, 4.0; HW GPM, 1.0.

EXISTING FCU-E: FAN CFM, 800; OA CFM, 50; CHW

GPM, 5.1; HW GPM, 1.2.

A

B

C

D

E

F E

D C

B G

Alexandria, Louisiana

A&E Design - Upgrade Energy Management Control Systems

October 30, 2013

VA256-12-C-0253

VETERANS HEALTH CARE

SYSTEM

Alexandria, LA

A

U.S. Department of Veterans Affairs

3RD FLOOR PLAN - MECHANICAL

9 WLP NMT

M9-103

M

EXIST WFM-9-11

EXIST 9AC-3

EXIST BYPASS

DAMPER

EXIST 9AC-1EXIST 9AC-2

EXIST 9EF-4

EXIST 1.5 HP EXHAUST FAN

(9EF-3)

EXIST 1 HP EXHAUST FAN

(9EF-1)

EXIST 0.5 HP EXHAUST FAN

(9EF-2)

EXIST ELEVATOR

HOISTWAY PNEUMATIC

SMOKE DAMPER TO BE

CONVERTED TO DDC

CONTROL. (TYP.)

F E

D C

B G

Alexandria, Louisiana

A&E Design - Upgrade Energy Management Control Systems

October 30, 2013

VA256-12-C-0253

VETERANS HEALTH CARE

SYSTEM

Alexandria, LA

A

U.S. Department of Veterans Affairs

4TH FLOOR PLAN - MECHANICAL

9 WLP NMT

M9-104

PREHEAT CONTROL VALVE (V-1)AO1

CHILLED WATER CONTROL VALVE (V-3)AO2

AO3 STEAM CONTROL VALVE (V-2)

AO4

AO5

AO6

ZONE 1 SUPPLY AIR DISCHARGE DAMPER (D-1) CONTROLLER

ZONE 2 SUPPLY AIR DISCHARGE DAMPER (D-2) CONTROLLER

ZONE 3 SUPPLY AIR DISCHARGE DAMPER (D-3) CONTROLLER

SUPPLY FAN START/STOPDO1

PREHEAT CONTROL VALVE (V-1)

PREHEAT COIL DISCHARGE AIR TEMPERATURE SENSOR (T-1)AI2

AI1

CHILLED WATER CONTROL VALVE (V-2)AI3

STEAM CONTROL VALVE (V-3)AI4

AI6

AI7

AI5

AI8

AI10

AI11

AI9

AI12

AI13

AI14

AI15

COLD DECK TEMPERATURE SENSOR (T-4)

HOT DECK TEMPERATURE SENSOR (T-3)

ZONE 1 SUPPLY AIR DISCHARGE DAMPER (D-1)

ZONE 2 SUPPLY AIR DISCHARGE DAMPER (D-2)

ZONE 3 SUPPLY AIR DISCHARGE DAMPER (D-3)

ZONE 1 SUPPLY AIR DISCHARGE TEMPERATURE SENSOR (T-5)

ZONE 2 SUPPLY AIR DISCHARGE TEMPERATURE SENSOR (T-6)

ZONE 1 AIR TEMPERATURE SENSOR (T-8)

ZONE 3 SUPPLY AIR DISCHARGE TEMPERATURE SENSOR (T-7)

NOT USESD

NOT USED

FILTER STATUS (DPS-1)

DI2

DI3

DI1

LOW LIMIT TEMPERATURE SENSOR (T-2) STATUS

SUPPLY FAN STATUS

KEYNOTES:

EXIST DDC CONTROL DEVICE MAY BE REUSEED IF FUNCTIONAL AND

COMPATIBLE.

EXISTING PNEUMATIC CONTROL DEVICE SHALL BE REPLACED WITH DDC

DEVICE.

EXIST DDC CONTROL DEVICE SHALL BE REPLACED.

REPLACE EXIST 3-WAY CHILLED WATER VALVE WITH 2-WAY.

PROVIDE NEW DDC CONTROLLER AND CONNECT TO EXISTING

ELECTRICAL SERVICES.

OUTSIDE AIR

DPS-1

T-8

C H

W R

SUPPLY

V-3

NCSTR

FAN

DI3

DO1

AI3

AO2

DI2DI1

AI13

AI7

AO4

PANEL

DDC CONTROL

AIR FILTER

T-2

D-1

T

AI10

T-5

L P

S

V-2

NO

AI5

T-4

AI4

AO3

AI6

TYP 3 ZONES

AI8

AO5

AI9

AO6

AI11

AI12

T-6

T-7 D-2

D-3

H W

R

V-1

NO

AI1

AO1

T

AI2

T-1

T-3

SEQUENCE OF OPERATION

1. GENERAL

1.1. ZONE 1 DIRECTLY SERVES COMMON SPACES. ZONES 2&3 SERVE FCU'S.

1.2. THE AIR HANDLING UNIT IS SCHEDULED FOR AUTOMATIC OPERATION ON A TIME OF DAY BASIS FOR

OCCUPIED AND UNOCCUPIED MODES.

1.3. WITHIN OCCUPIED MODE, THE SYSTEM CAN ENTER THE WARM-UP MODE WHEN THE SPACE

TEMPERATURE IS BELOW SETPOINT OR THE COOL-DOWN MODE WHEN THE SPACE TEMPERATURE IS

ABOVE SETPOINT. THE SYSTEM STAYS IN THE WARM-UP OR COOL-DOWN MODE UNTIL THE MODE

SETPOINT IS SATISFIED.

1.4. WITHIN THE UNOCCUPIED MODE, NIGHT HEATING IS AVAILABLE WHEN THE SPACE TEMPERATURE DROPS BELOW 65°F. THE LATEST START TIME IS THE SCHEDULED OCCUPANCY FOR THE SPACE.

1.5. ALL SUGGESTED SETPOINTS AND SETTINGS ARE ADJUSTABLE.

2. WARM-UP

2.1. THE SUPPLY FAN STARTS. THE OUTSIDE AIR DAMPER IS OPEN AND PREHEAT COIL MODULATES TO

MAINTAIN DISCHARGE TEMPERATURE OF 45°F AND COLD DECK COOLING COIL VALVE REMAIN

CLOSED. THE HOT DECK HEATING COIL VALVE MODULATES TO MAINTAIN THE HOT DECK SUPPLY

TEMPERATURE SETPOINT.

2.2. THE SYSTEM IS PREVENTED FROM ENTERING THE WARM-UP MODE MORE THAN ONCE PER DAY.

3. COOL-DOWN

3.1. THE SUPPLY FAN STARTS. THE HOT DECK HEATING COIL VALVE REMAINS CLOSED. THE COLD DECK

COOLING VALVE MODULATES TO MAINTAIN THE COLD DECK SUPPLY AIR TEMPERATURE AT

SETPOINT. THE OUTSIDE AIR DAMPER IS OPEN.

3.2. IF TIME REACHES THE LATEST START TIME DURING THE COOL-DOWN MODE, THE OUTDOOR AIR

DAMPER OPENS.

3.3. THE SYSTEM IS PREVENTED FROM ENTERING COOL-DOWN MODE MORE THAN ONCE PER DAY.

4. OCCUPIED

4.1. THE SUPPLY AIR TEMPERATURE SETPOINT FOR ZONE 1 IS RESET BASED ON THE ROOM

TEMPERATURE SETPOINT. SUPPLY AIR TEMPERATURE SETPOINT FOR ZONE 2&3 SHALL BE 55°F

WHEN OA DEWPOINT IS GREATER THAN 55°F AND RESET BETWEEN 55° & 75°F WHEN OA DEWPOINT IS BELOW 55°F BASED ON FCU VALVE POSITION TO MINIMIZE SIMULTANEOUS HEATING AND COOILING

AT THE FCU LEVEL.

4.2. HOT DECK AIR TEMPERATURE SETPOINT SHALL BE 95°F AND RESET BETWEEN 95°F AND 75°F BASED

ON ZONE 1 HEATING DEMAND. HEATING SHALL BE DISABLED WHEN OA IS ABOVE 70°F.

4.3. COLD DECK AIR TEMPERATURE SETPOINT SHALL BE 55°F WHEN OA DWPIONT IS GREATER THAN 55°F

AND RESET BETWEEN 55°F & 75°F BASED ON ZONE 1 COOLING DEMAND.

4.4. SUPPLY AIR DISCHARGE DAMPERS MODULATE TO MAINTAIN SUPPLY AIR TEMPERATURE SETPOINT

FOR EACH ZONE.

4.5. THE FAN STARTS OR CONTINUES TO RUN AND THE UNIT IS CONTROLLED AS FOLLOWS:

4.5.1. THE PREHEAT COIL MODULATES TO MAINTAIN A DISCHARGE TEMPERATURE OF 45°F

(ADJUSTABLE).

4.5.2. THE HOT DECK HEATING COIL VALVE MODULATES TO MAINTAIN THE HOT DECK AIR

TEMPERATURE SETPOINT.

4.5.3. THE COLD DECK COOILING COIL VALVE MODULATES TO MAINTAIN THE COLD DECK AIR

TEMPERATURE SETPOINT.

4.5.4. THE OUTSIDE AIR DAMPER IS OPEN.

5. UNOCCUPIED

5.1. THE FAN IS OFF, THE COLD DECK COOLING COIL VALVE CLOSES, AND THE OUTSIDE AIR DAMPER IS

CLOSED. THE HOT DECK HEATING COIL VALVE OPENS.

6. NIGHT HEATING

6.1. THE SUPPLY FAN STARTS WITH THE PREHEAT COIL MODULATING TO MAINTAIN DISCHARGE TEMPERATURE OF 45°F AND HOT DECK HEATING COIL VALVE OPEN TO MAINTAIN A MIN. SPACE TEMPERATURE OF 65°F IN ANY OF THE ZONES. THE COLD DECK COOLING COIL VALVE SHALL REMAIN

CLOSED AND THE OUTSIDE AIR DAMPER IS OPEN.

7. ALARMS

7.1. WHEN THE OAT IS LESS THAN 45°F, THE HOT DECK HEATING COIL VALVE MODULATES TO MAINTAIN THE HOT DECK AIR TEMPERATURE AT 45°F AND THE COLD DECK COOLING VALVE OPENS. WHEN THE OAT IS 45°F OR ABOVE, THE HOT DECK HEATING VALVE AND THE COLD DECK COOLING VALVE CLOSE.

ALL OTHER DAMPERS AND VALVES POSITION TO THEIR NORMAL POSITIONS AFTER THE FAN IS

EN-ENERGIZED.

7.2. A LOW TEMPERATURE DETECTOR IN THE DISCHARGE OF THE HEATING COIL DE-ENERGIZES THE SUPPLY FAN WHEN TEMPERATURES BELOW 38°F ARE SENSED. THE HOT DECK HEATING COIL VALVE MODULATES TO MAINTAIN THE HOT DECK AIR TEMPERATURE AT 45°F AND THE COLD DECK COOLING VALVE OPENS. ALL OTHER DAMPERS AND VALVES POSITION TO THEIR NORMAL POSITIONS AFTER

THE FAN IS DE-ENERGIZED.

7.3. A CURRENT SWITCH IS INSTALLED IN THE SUPPLY FAN STARTER. THE DDC SYSTEM USES THIS SWITCH TO CONFIRM THE FAN IS IN THE DESIRED STATE (I.E. ON OR OFF) AND GENERATES AN

ALARM IF STATUS DEVIATES FROM DDC START/STOP CONTROL.

2 4

COIL

HTG

COIL

CLG

T T

T

T

ZONE 1 THERMOSTAT

COIL

PREHEAT

F E

D C

B G

Alexandria, Louisiana

A&E Design - Upgrade Energy Management Control Systems

October 30, 2013

VA256-12-C-0253

VETERANS HEALTH CARE

SYSTEM

Alexandria, LA

A

U.S. Department of Veterans Affairs

9AC-1 CONTROL SCHEMATIC

& SEQUENCE

9 WLP NMT

M9-200

AIR HANDLING UNITS BALANCING SCHEDULE

LABEL AREA SERVED SUPPLY CFM OA CFM

COOLING COIL

GPM

PREHEAT

COIL LBS/HR

REHEAT COIL

LBS/HR

9AC-1

FCU'S ON NORTHEAST

WING OF FLOORS 1-3

5300 5300 92.0 388 135

9AC-2

FCU'S ON SOUTHWEST

WING OF FLOORS 1-3

4000 4000 74.0 275 115

9AC-3

FCU'S & VAV BOXES IN

1ST FLOOR DINING &

CENTRAL OFFICES

4155 1100 36.0 270 -

SEQUENCE OF OPERATION

1. GENERAL

1.1. THE AIR HANDLING UNIT IS SCHEDULED FOR AUTOMATIC OPERATION ON A TIME OF DAY BASIS FOR

OCCUPIED AND UNOCCUPIED MODES.

1.2. WITHIN OCCUPIED MODE, THE SYSTEM CAN ENTER THE WARM-UP MODE WHEN THE SPACE

TEMPERATURE IS BELOW SETPOINT OR THE COOL-DOWN MODE WHEN THE SPACE TEMPERATURE IS

ABOVE SETPOINT. THE SYSTEM STAYS IN THE WARM-UP OR COOL-DOWN MODE UNTIL THE MODE

SETPOINT IS SATISFIED.

1.3. WITHIN THE UNOCCUPIED MODE, NIGHT HEATING IS AVAILABLE WHEN THE SPACE TEMPERATURE DROPS BELOW 65°F. THE LATEST START TIME IS THE SCHEDULED OCCUPANCY FOR THE SPACE.

1.4. ALL SUGGESTED SETPOINTS AND SETTINGS ARE ADJUSTABLE.

2. WARM-UP

2.1. THE SUPPLY FAN STARTS. THE OUTSIDE AIR DAMPER IS OPEN AND PREHEAT COIL AND COLD DECK

COOLING COIL VALVE REMAIN CLOSED. THE HOT DECK HEATING COIL VALVE MODULATES TO

MAINTAIN THE HOT DECK SUPPLY AIR TEMPERATURE SETPOINT.

2.2. IF TIME REACHES THE LATEST START TIME DURING THE WARM-UP MODE, THE OUTDOOR AIR

DAMPER OPENS TO ITS MIN. POSITION.

2.3. THE SYSTEM IS PREVENTED FROM ENTERING THE WARM-UP MODE MORE THAN ONCE PER DAY.

3. COOL-DOWN

3.1. THE SUPPLY FAN STARTS. THE HOT DECK HEATING COIL VALVE REMAINS CLOSED. THE COLD DECK

COOLING COIL VALVE MODULATES TO MAINTAIN THE COLD DECK SUPPLY AIR TEMPERATURE AT

SETPOINT. THE OUTSIDE AIR DAMPER IS OPEN.

3.2. IF TIME REACHES THE LATEST START TIME DURING THE COOL-DOWN MODE, THE OUTDOOR AIR

DAMPER OPENS.

3.3. THE SYSTEM IS PREVENTED FROM ENTERING COOL-DOWN MODE MORE THAN ONCE PER DAY.

4. OCCUPIED

4.1. THE SUPPLY AIR TEMPERATURE SETPOINT FOR ZONE 1 IS RESET BASED ON THE ROOM

TEMPERATURE SETPOINT. SUPPLY AIR TEMPERATURE SETPOINT FOR ZONE 2&3 SHALL BE 55°F

WHEN OA DEWPOINT IS GREATER THAN 55°F AND RESET BETWEEN 55° & 75°F WHEN OA DEWPOINT IS BELOW 55°F BASED ON FCU VALVE POSITION TO MINIMIZE SIMULTANEOUS HEATING AND COOILING

AT THE FCU LEVEL.

4.2. HOT DECK AIR TEMPERATURE SETPOINT SHALL BE 95°F AND RESET BETWEEN 95°F AND 75°F BASED

ON ZONE 1 HEATING DEMAND. HEATING SHALL BE DISABLED WHEN OA IS ABOVE 70°F.

4.3. COLD DECK AIR TEMPERATURE SETPOINT SHALL BE 55°F WHEN OA DWPIONT IS GREATER THAN 55°F

AND RESET BETWEEN 55°F & 75°F BASED ON ZONE 1 COOLING DEMAND.

4.4. SUPPLY AIR DISCHARGE DAMPERS MODULATE TO MAINTAIN SUPPLY AIR TEMPERATURE SETPOINT

FOR EACH ZONE.

4.5. THE FAN STARTS OR CONTINUES TO RUN AND THE UNIT IS CONTROLLED AS FOLLOWS:

4.5.1. THE PREHEAT COIL MODULATES TO MAINTAIN A DISCHARGE PRESSURE OF 45°F (ADJUSTABLE).

4.5.2. THE HOT DECK HEATING COIL VALVE MODULATES TO MAINTAIN THE HOT DECK AIR

TEMPERATURE SETPOINT.

4.5.3. THE COLD DECK COOLING COIL VALVE MODULATES TO MAINTAIN THE COLD DECK AIR

TEMPERATURE SETPOINT.

4.5.4. THE OUTSIDE AIR DAMPER IS OPEN.

5. UNOCCUPIED

5.1. THE FAN IS OFF, THE COLD DECK COOLING COIL VALVE CLOSES, AND THE OUTSIDE AIR DAMPER IS

CLOSED. THE HOT DECK HEATING COIL VALVE OPENS.

6. NIGHT HEATING

6.1. THE SUPPLY FAN STARTS WITH THE HOT DECK HEATING COIL VALVE OPEN TO MAINTAIN A MIN.

SPACE TEMPERATURE OF 65°F IN ANY OF THE ZONES. THE COLD DECK COOLING COIL VALVE

REMAINS CLOSED AND PREHEAT VALVE MODULATES TO MAINTAIN DISCHARGE TEMPERATURE OF

45°F AND THE OUTSIDE AIR DAMPER IS OPEN.

7. ALARMS

7.1. WHEN THE OAT IS LESS THAN 45°F, THE HOT DECK HEATING COIL VALVE MODULATES TO MAINTAIN THE HOT DECK AIR TEMPERATURE AT 45°F AND THE COLD DECK COOLING VALVE OPENS. WHEN THE OAT IS 45°F OR ABOVE, THE HOT DECK HEATING COIL VALVE AND THE COLD DECK COOLING VALVE CLOSE. ALL OTHER DAMPERS AND VALVES POSITION TO THEIR NORMAL POSITIONS AFTER THE FAN

IS EN-ENERGIZED.

7.2. A LOW TEMPERATURE DETECTOR IN THE DISCHARGE OF THE HEATING COIL DE-ENERGIZES THE SUPPLY FAN WHEN TEMPERATURES BELOW 38°F ARE SENSED. THE HOT DECK HEATING COIL VALVE MODULATES TO MAINTAIN THE HOT DECK AIR TEMPERATURE AT 45°F AND THE COLD DECK COOLING VALVE OPENS. ALL OTHER DAMPERS AND VALVES POSITION TO THEIR NORMAL POSITIONS AFTER

THE FAN IS DE-ENERGIZED.

7.3. A CURRENT SWITCH IS INSTALLED IN THE SUPPLY FAN STARTER. THE DDC SYSTEM USES THIS SWITCH TO CONFIRM THE FAN IS IN THE DESIRED STATE (I.E. ON OR OFF) AND GENERATES AN

ALARM IF STATUS DEVIATES FROM DDC START/STOP CONTROL.

KEYNOTES:

EXIST DDC CONTROL DEVICE MAY BE REUSEED IF FUNCTIONAL AND

COMPATIBLE.

EXISTING PNEUMATIC CONTROL DEVICE SHALL BE REPLACED WITH DDC

DEVICE.

EXIST DDC CONTROL DEVICE SHALL BE REPLACED.

REPLACE 3-WAY CHILLED WATER VALVE WITH 2-WAY.

PROVIDE NEW DDC CONTROLLER AND CONNECT TO EXISTING ELECTRICAL

SERVICES.

2 4

DI3

DO1

AI3

AO2

DI2DI1 AI7

AO4

PANEL

DDC CONTROL

AI9AI5

AI4

AO3

AI6

AI8

AO5

AI1

AO1

AI2

OUTSIDE AIR

DPS-1

C H

W R

SUPPLY

V-3

NCSTR

FAN

AIR FILTER

T-2

D-1 T-5

L P

S

V-2

NO

T-3

TYP 2 ZONES

T-6D-2

L P

S

V-1

NO

T

T-1

T-4

COIL

HTG

COIL

CLG

T

T

T

COIL

PREHEAT

T

T-7

AI11

T

ZONE 1 THERMOSAT

AI10

PREHEAT CONTROL VALVE (V-1)AO1

CHILLED WATER CONTROL VALVE (V-3)AO2

AO3 STEAM CONTROL VALVE (V-2)

AO4

AO5

ZONE 1 SUPPLY AIR DISCHARGE DAMPER (D-1) CONTROLLER

ZONE 2 SUPPLY AIR DISCHARGE DAMPER (D-2) CONTROLLER

SUPPLY FAN START/STOPDO1

PREHEAT CONTROL VALVE (V-1)

PREHEAT COIL DISCHARGE AIR TEMPERATURE SENSOR (T-1)AI2

AI1

CHILLED WATER CONTROL VALVE (V-2)AI3

STEAM CONTROL VALVE (V-3)AI4

AI6

AI7

AI5

AI8

AI10

AI11

AI9

AI12

COLD DECK TEMPERATURE SENSOR (T-3)

HOT DECK TEMPERATURE SENSOR (T-4)

ZONE 1 SUPPLY AIR DISCHARGE DAMPER (D-1)

ZONE 2 SUPPLY AIR DISCHARGE DAMPER (D-2)

ZONE 1 SUPPLY AIR DISCHARGE TEMPERATURE SENSOR (T-5)

ZONE 2 SUPPLY AIR DISCHARGE TEMPERATURE SENSOR (T-6)

ZONE 1 AIR TEMPERATURE SENSOR (T-7)

NOT USED

FILTER STATUS (DPS-1)

DI2

DI3

DI1

LOW LIMIT TEMPERATURE SENSOR (T-2) STATUS

SUPPLY FAN STATUS

F E

D C

B G

Alexandria, Louisiana

A&E Design - Upgrade Energy Management Control Systems

October 30, 2013

VA256-12-C-0253

VETERANS HEALTH CARE

SYSTEM

Alexandria, LA

A

U.S. Department of Veterans Affairs

9AC-2 CONTROL SCHEMATIC

& SEQUENCE

9 WLP NMT

M9-201

SUPPLY

VFD

FAN

DO3

DI6

COIL

L P

S

V-1

NO

HTG

AI4

AO1DO1

DI1 AI3

PANEL

DDC CONTROL

H-1

OUTSIDE AIR

D-1

AI2

RETURN AIRT-2

C H

W R

COIL

CLG

V-2

NC

AI5

AO2

AI8

T-5

SPS-1

AI7

AIR

FILTER

DI4

T-3

DI2

D02

D-2

AI1

T-1

D-2

SEQUENCE OF OPERATION

1. GENERAL

1.1. THE AIR HANDLING UNIT IS SCHEDULED FOR AUTOMATIC OPERATION ON A TIME OF DAY BASIS FOR OCCUPIED

AND UNOCCUPIED MODES.

1.2. WITHIN OCCUPIED MODE, THE SYSTEM CAN ENTER THE WARM-UP MODE WHEN THE SPACE TEMPERATURE IS BELOW SETPOINT OR THE COOL-DOWN MODE WHEN THE SPACE TEMPERATURE IS ABOVE SETPOINT. THE SYSTEM STAYS IN THE WARM-UP OR COOL-DOWN MODE UNTIL THE MODE SETPOINT IS SATISFIED.

1.3. WITHIN THE UNOCCUPIED MODE, NIGHT HEATING IS AVAILABLE WHEN THE SPACE TEMPERATURE DROPS BELOW

65°F. THE LATEST START TIME IS THE SCHEDULED OCCUPANCY FOR THE SPACE.

1.4. ALL SUGGESTED SETPOINTS AND SETTINGS ARE ADJUSTABLE.

2. WARM-UP

2.1. THE SUPPLY FAN STARTS. THE RETURN AIR DAMPER IS OPEN, THE OUTSIDE AIR DAMPER IS CLOSED, AND COOLING COIL VALVE REMAIN CLOSED. THE HEATING COIL VALVE MODULATES TO MAINTAIN THE HEATING AIR

TEMPERATURE SETPOINT.

2.2. IF TIME REACHES THE LATEST START TIME DURING THE WARM-UP MODE, THE OUTDOOR AIR DAMPER OPENS TO

ITS MIN. POSITION.

2.3. THE SYSTEM IS PREVENTED FROM ENTERING THE WARM-UP MODE MORE THAN ONCE PER DAY.

3. COOL-DOWN

3.1. THE SUPPLY FAN STARTS AND THE HEATING COIL VALVE REMAINS CLOSED. THE COOLING COIL VALVE AND RETURN AIR AND OUTSIDE AIR DAMPERS MODULATE TO MAINTAIN THE SUPPLY AIR TEMPERATURE AT SETPOINT.

3.2. WHEN THE OUTSIDE AIR DRY BULB TEMPERATURE IS ABOVE THE ECONOMIZER CHANGEOVER VALUE, THE MIXING

DAMPERS ARE POSITIONED FOR 100% RETURN AIR.

3.3. IF TIME REACHES THE LATEST START TIME DURING THE COOL-DOWN MODE, THE OUTDOOR AIR DAMPER OPENS

TO ITS MIN. POSITION OR IS CONTROLLED IN ECONOMIZER OPERATION.

3.4. THE SYSTEM IS PREVENTED FROM ENTERING COOL-DOWN MODE MORE THAN ONCE PER DAY.

4. OCCUPIED

4.1. THE FAN STARTS OR CONTINUES TO RUN AND THE UNIT IS CONTROLLED AS FOLLOWS:

4.1.1. WHEN THE OUTSIDE AIR DRY BULB TEMPERATURE IS BELOW THE 70°F AND THE OA ENTHALPY IS BELOW THE RA ENTHALPY, THE HEATING COIL VALVE, COOLING COIL VALVE, AND RETURN AIR AND OUTSIDE AIR DAMPERS MODULATE IN SEQUENCE WITHOUT OVERLAP TO MAINTAIN THE SUPPLY AIR TEMPERATURE SETPOINT WITH A LOW LIMIT OF 48°F AT THE MIXED AIR SENSOR. THE MIXING DAMPERS OPEN SLOWLY TO

MINIMIZE OVERSHOOTING. MAXIMUM OA VALUE SHALL BE SET TO PREVENT BUILDING OVER

PRESSURIZATION.

4.1.2. WHEN THE OUTSIDE AIR DRY BULB TEMPERATURE IS ABOVE ABOVE 70° OR THE OA ENTHALPY IS ABOVE THE RA ENTHALPY, THE RETURN AIR AND OUTSIDE AIR DAMPERS ARE PLACED IN THE MIN. OUTDOOR AIR POSITION. THE HEATING COIL VALVE AND COOLING COIL VALVE MODULATE IN SEQUENCE WITHOUT OVERLAP TO MAINTAIN THE SUPPLY AIR TEMPERATURE SETPOINT. SUPPLY AIR TEMPERATURE SETPOINT SHALL BE 55°F. WHEN OA DEQPOINT IS BELOW 55°F THE SUPPLY AIR TEMPERATURE SETPOINT SHALL BE RESET BASED

ON TERMINAL BOX DEMAND.

5. UNOCCUPIED

5.1. THE SUPPLY FAN STOPS, THE COOLING COIL VALVE CLOSES AND THE MIXING DAMPERS CLOSE TO THE OUTDOOR AIR. IF THE OAT IS LESS THAN 45°F, THE HEATING COIL VALVE MODULATES TO MAINTAIN THE UNOCCUPIED SUPPLY AIR SETPOINT. IF THE OAT IS 45°F OR ABOVE, THE HEATING COIL VALVE CLOSES.

6. NIGHT HEATING

6.1. THE SUPPLY FAN STARTS WITH THE HEATING COIL VALVE OPEN TO MAINTAIN A MIN. SPACE TEMPERATURE OF 65°F. THE OUTSIDE AIR DAMPER IS CLOSED, THE RETUREN AIR DAMPER IS OPEN AND THE COOLING COIL VALVE

REMAINS CLOSED.

7. NIGHT COOLING

7.1. THE SUPPLY FAN STARTS WITH THE COOLING COIL VALVE OPEN TO MAINTAIN A MIN. SPACE TEMPERATURE OF 85°F. THE OUTSIDE AIR DAMPER IS CLOSED, THE RETURN AIR DAMPER IS OPEN, AND THE HEATING COIL VALVE

REMAINS CLOSED.

8. STATIC PRESSURE CONTROL

8.1. THE SUPPLY FAN VFD MODULATES TO MAINTAIN A CONSTANT DUCT STATIC PRESSURE OF 1.5 INCHES OF WATER

AS SENSED AT LEAST 2

3 OF THE WAY DOWNSTREAM OF THE SUPPLY FAN IN THE LONGEST OR MOST CRITICAL

DUCT. STATIC PRESSURE SETPOINT SHALL BE RESET BASED ON TERMINAL BOX DAMPER POSITIONS TO MINIMIZE

FAN ENERGY.

8.2. UPON INITIAL STARTUP OF THE AIR HANDLING SYSTEM, THE SUPPLY FAN SPEED SLOWLY RAMPS TO THE

DESIRED STATIC PRESSURE SETPOINT.

8.3. UPON SHUTDOWN OF THE AIR HANDLING SYSTEM, THE SUPPLY FAN VFD STOPS AND THE SPEED SIGNAL GOES

TO ZERO SPEED.

9. ALARMS

9.1. DISCHARGE HIGH STATIC CUTOUT, SMOKE DETECTORS IN THE SUPPLY AND RETURN AIR STREAMS, AND SUPPLY FAN VFD FAULT ALARMS DE-ENERGIZE THE SUPPLY FAN UPON ACTIVATION. WHEN THE OAT IS LESS THAN 45°F, THE HEATING COIL VALVE MODULATES TO MAINTAIN THE MIXED AIR TEMPERATURE AT 45°F. WHEN THE OAT IS 45°F OR ABOVE, THE HEATING COIL VALVE CLOSES. ALL OTHER DAMPERS AND VALVES POSITION TO THEIR

NORMAL POSITIONS AFTER THE FAN IS EN-ENERGIZED.

9.2. A LOW TEMPERATURE DETECTOR IN THE DISCHARGE OF THE HEATING COIL DE-ENERGIZES THE SUPPLY FAN WHEN TEMPERATURES BELOW 38°F ARE SENSED. THE HEATING COIL VALVE MODULATES TO MAINTAIN THE HOT DECK AIR TEMPERATURE AT 45°F. ALL OTHER DAMPERS AND VALVES POSITION TO THEIR NORMAL POSITIONS

AFTER THE FAN IS DE-ENERGIZED.

9.3. A CURRENT SWITCH IS INSTALLED ON THE LOAD SIDE OF THE SUPPLY FAN VFD. THE DDC SYSTEM USES THIS SWITCH TO CONFIRM THE FAN IS IN THE DESIRED STATE (I.E. ON OR OFF) AND GENERATES AN ALARM IF STATUS DEVIATES FROM DDC START/STOP CONTROL. THE DDC SYSTEM GENERATES A VFD TROUBLE ALARM

INDEPENDENT FROM THE FAN STATUS.

KEYNOTES:

EXIST DDC CONTROL DEVICE MAY BE REUSEED IF FUNCTIONAL AND

COMPATIBLE.

EXISTING PNEUMATIC CONTROL DEVICE SHALL BE REPLACED WITH DDC

DEVICE.

NEW DDC DEVICE.

EXISTING DDC DEVICE SHALL BE REPLACED.

REPLACE 3-WAY CHILLED WATER VAVLE WITH 2-WAY.

PROVIDE NEW DDC CONTROLLER AND CONNECT TO EXISTING ELECTRICAL

SERVICES.

SD-2SD-1

AI6

AO3

2 5

EXISTING BYPASS

DAMPER TO BE

REMOVED. CAP AND

SEAL BOTH

REMAINING DUCT

OPENINGS.

DI5

T-4

1 1

1 1

TH

T T T T

DI3 DI7

STEAM CONTROL VALVE (V-1)AO1

CHILLED WATER CONTROL VALVE (V-2)AO2

AO3 SUPPLY FAN VFD SPEED

OUTSIDE AIR DAMPER (D-1) STATUSDO1

MIXED AIR TEMPERATURE SENSOR (T-1)

RETURN AIR HUMIDITY SENSOR (H-1)AI2

AI1

STEAM CONTROL VALVE (V-1)AI4

AI6

AI7

AI5

AI8

CHILLED WATER CONTROL VALVE (V-2)

SUPPLY FAN VFD STATUS

STATIC PRESSURE SENSOR (SPS-1) STATUS

SUPPLY AIR DISCHARGE TEMPERATURE SENSOR (T-5)

OUTSIDE AIR DAMPER (D-1)

DI2

DI3

DI1

RETURN AIR DAMPER (D-2)

MIXED AIR SMOKE DETECTOR (SD-1)

LOW LIMIT TEMPERATURE SENSOR (T-3) STATUS

DI5

DI6

DI4

HIGH LIMIT TEMPERATURE SENSOR (T-4) STATUS

SUPPLY FAN STATUS

DI7 SUPPLY AIR DISCHARGE SMOKE DETECTOR (SD-2)

RETURN AIR DAMPER (D-2) STATUSDO2

SUPPLY FAN START/STOPDO3

RETURN AIR TEMPERATURE SENSOR (T-2)AI3

F E

D C

B G

Alexandria, Louisiana

A&E Design - Upgrade Energy Management Control Systems

October 30, 2013

VA256-12-C-0253

VETERANS HEALTH CARE

SYSTEM

Alexandria, LA

A

U.S. Department of Veterans Affairs

9AC-3 CONTROL SCHEMATIC

& SEQUENCE & SMOKE DAMPER

CONTROL SCHEMATIC

9 WLP NMT

M9-202

H-2 T-6 3 3

TH

AI10AI9

AI9 STATIC PRESSURE SENSOR (SPS-2) STATUS

AI10 NOT USED

EXIST SMOKE

WALL

M

JB 120 V

POWER

SMOKE DETECTOR

AUX CONTACT

EXIST SMOKE

DAMPER

DEMO EXIST PNEUMATIC SMOKE

DAMPER CONTROL VALVE AND

PNEUMATIC LINES BACK TO MAIN.

REPLACE EXIST PNEUMATIC ACTUATOR WITH

ELECTRIC ACTUATOR. EXTEND EXIST POWER

AND CONTROL TO NEW ACTUATOR. CONNECT

TO FIRE ALARM SYSTEM.

TO OTHER SMOKE

DAMPERS.

SPS-2

AI9

SUPPLY

AIR

INSTALL NEW STATIC

PRESSURE SENSOR 2

DOWN LONGEST RUN.

SCHWS

SCHWR

STR

HWS HWS

HWR HWR

SEQUENCE OF OPERATION

1. GENERAL

1.1. THE HOT WATER SYSTEM CONSISTS OF HOT WATER PUMPS WITH INDIVIDUAL VARIABLE FREQUENCY DRIVES (VFD) AND TWO STEAM HEAT

EXCHANGERS. THE SYSTEM IS DDC CONTROLLED WITH ELECTRIC ACTUATION.

1.2. THE SYSTEM IS ON WHEN ANY FCU OR REHEAT COIL CALLS FOR HEATING.

2. HEAT EXCHANGER CONTROL

1.1 ONCE FLOW IS PROVEN BY FLOW SWITCH AT EXCHANGER, STEAM CONTROL VALVES SHALL MODULATE TO MAINTAIN THE HOT WATER SUPPLY

TEMPERATURE AT SETPOINT.

1.2 THE HOT WATER SUPPLY TEMPERATURE RESETS INVERSELY WITH THE OUTDOOR TEMPERATURE AS SCHEDULED: AT 30°F OA - HWS AT 180°F, AT

70°F OA - HWS AT 140°F.

1.3 STEAM HOT WATER CONVERTERS ARE 100% REDUNDANT AND ONLY ONE UNIT AT A TIME WILL OPERATE.

3. HOT WATER PUMP ALTERNATION

3.1. SECONDARY HOT WATER PUMPS ALTERNATE TO EQUALIZE RUNTIME. SELECTION OF THE LEAD PUMP IS EVALUATED ON A WEEKLY BASIS. THE PUMP WITH THE LEAST RUNTIME IS THE LEAD PUMP. THE PUMP WITH THE MOST RUNTIME IS THE LAG PUMP.

4. HOT WATER PUMP CONTROL

4.1. WHEN THE HOT WATER SYSTEM IS ON THE LEAD SECONDARY HOT WATER PUMP STARTS.

4.2. THE DDC SYSTEM USES CURRENT SWITCHES TO CONFIRM THE LEAD PUMP IS IN THE DESIRED STATE (I.E. ON OR OFF) AND GENERATES AN ALARM IF STATUS DEVIATES FROM DDC START/STOP CONTROL. IF THE LEAD PUMP GOES INTO ALARM, THE LAG PUMP STARTS.

NOTES:

1. ALL CONTROL DEVICES ARE EXISTING DDC.

SENSOR, ACTUATORS, ETC MAY BE REUSED IF

FUNCTIONAL AND COMPATIBLE.

2. PROVIDE NEW CONTROLLER. CONNECT TO

EXISTING ELECTRICAL SERVICES.

3. PROVIDE NEW DIFFERENTIAL PRESSURE SENSOR.

4. PROVIDE NEW 10 HP VFD'S.

F E

D C

B G

Alexandria, Louisiana

A&E Design - Upgrade Energy Management Control Systems

October 30, 2013

VA256-12-C-0253

VETERANS HEALTH CARE

SYSTEM

Alexandria, LA

A

U.S. Department of Veterans Affairs

T

T

AI3

STR

DI3

DO1

DI4

DO2

VFD

T

AI4

T

AI3

VFD

DI1

DO1

DI2

DO2

CAMPUS

CHWR

CAMPUS

CHWS

T AI4

RELOCATE EXISITNG

TEMPERATURE SENSOR TO

COMMON PIPE.

DI1

FS

STEAM CONV.

TO COND. PUMP

TO COND. PUMP

STEAM

SUPPLY

STEAM

SUPPLY

STEAM CONV.

AI1

DI2

FS

AO1

AI2

AO2

KEYNOTES

EXISTING DDC DEVICE MAY BE

REUSED IF IN FUNCTIONAL AND

COMPATABLE.

NEW DDC DEVICE TO BE INSTALLED.

EXISTING PNEUMATIC DEVICE TO BE

REPLACED WITH DDC DEVICE.3

S T

E A

M C

O N

V

TO COND. PUMP

AI1

AO1

STEAM

SUPPLY

DCWS

D H

W S

T

AI2

KEYNOTES:

EXISTING PNEUMATIC CONTROL DEVICE TO BE

REPLACED WITH NEW DDC DEVICE.

SEQUENCE OF OPERATION

1. GENERAL

1.1. THE DOMESTIC HOT WATER SYSTEM IS ENABLED CONTINUOUSLY.

2. DOMESTIC HOT WATER CONVERTER CONTROL

2.1. STEAM CONTROL VAVLE V-1 & V-2 SHALL MODULATE TO MAINTAIN A DOMESTIC HOT WATER SUPPLY

TEMPERATURE SETPOINT OF 120°F (ADJUSTABLE).

AI2

AI1 STEAM CONTROL VALVE (V-1)

DOMESTIC HOT WATER SUPPLY TEMPERATURE

STEAM CONTROL VALVE (V-1)AO1

S T

E A

M C

O N

V

TO COND. PUMP

AI3

AO2

STEAM

SUPPLY

DCWS

D H

W S

T

AI4

AI4

AI3 STEAM CONTROL VALVE (V-2)

DOMESTIC HOT WATER SUPPLY TEMPERATURE

STEAM CONTROL VALVE (V-2)AO2

STEAM CONTROL VALVE (V-1)

STEAM CONTROL VALVE (V-2)AI2

AI1

AI4

HOT WATER RETURN TEMPERATURE SENSOR (T-1)

HOT WATER SUPPLY TEMPERATURE SENSOR (T-2)

STEAM CONVERTER FLOW SWITCH SENSOR STATUS

DI2

DI1

STEAM CONVERTER FLOW SWITCH SENSOR STATUS

AI3

V-1 V-2

V-1

V-2

T-1

T-2

STEAM CONTROL VALVE (V-1)AO1

STEAM CONTROL VALVE (V-2)AO2

CHILLED WATER PUMP 1 VFD STATUS

CHILLED WATER PUM 2 VFD STATUSAI2

AI1

AI4

DI1

CHILLED WATER SUPPLY TEMPERATURE SENSOR (T-2)

CHILLED WATER PUMP 1 START/STOP

CHILLED WATER RETURN TEMPERATURE (T-1)AI3

CHILLED WATER PUMP 1 VFD STATUSAO1

CHILLED WATER PUMP 2 VFD STATUSAO2

DO1 CHILLED WATER PUMP 1 START/STOP

T-1

T-2

DOMESTIC HOT WATER, HHW, &

SCHW SYSTEMS CONTROL

SCHEMATICS & SEQUENCES

9 WLP NMT

M9-203

NOTES:

1. PROVIDE DDC CONTROLLER. CONNECT

TO EXISTING ELECTRICAL SERVICES.

NOTES:

1. PROVIDE DDC CONTROLLER. CONNECT

TO EXISTING ELECTRICAL SERVICES.

PANEL

DDC CONTROL

EF9-4

DI1

DO1

EXHAUST FAN STATUSDI1

EXHAUST FAN START/STOPDO1

SEQUENCE OF OPERATION

1. START/STOP CONTROL

1.1. FAN TO RUN ON SCHEDULE (CONTINUOUSLY.)

2. ALARM

2.1. ALARM SHALL BE GENERATED WHEN STATUS

DOES NOT MATCH COMMAND.

NOTES:

1. ALL CONTROL DEVICES ARE EXISTING

PNEUMATIC TO BE REPLACED WITH DDC

DEVICE TO FULLY INTEGRATE TO SIEMENS

CAMPUS SYSTEM.

AI1

AO1

AI2

AO2

DI2 CHILLED WATER PUMP 2 START/STOP

DO2 CHILLED WATER PUMP 2 START/STOP

SEQUENCE OF OPERATION

1. GENERAL

1.1 THE EXISTING CHILLED WATER SUPPLY FROM THE CENTRAL COOLING PLANT PROVIDES CHILLED WATER TO THE VFD SECONDARY PUMPING SYSTEM AT BUILDING 9. THE SECONDARY PUMPS ARE 100% REDUNDANT REQUIRING ONLY ONE PUMP AT A TIME TO OPERATE.

1.2 UPON A CALL FOR COOLING FROM ANY AIR HANDLER OR FAN COIL, THE LEAD CHILLED WATER PUMP SHALL ENERGIZE AND THE RESPECTIVE VFD SHALL MODULATE THE PUMP TO MAINTAIN THE DIFFERENTIAL PRESSURE SETPOINT (ADJUSTABLE) AT THE DIFFERENTIAL PRESSURE

SENSOR LOCATED 3

4 OF THE WAY DOWN THE LONGEST PIPING RUN. THE VFD WILL MODULATE AS REQUIRED TO MAINTAIN THE SYSTEM

PRESSURE SETPOINT. MIN. VFD SPEED SHALL BE 30%.

1.3 CHILLED WATER DIFFERENTIAL SETPOINT SHALL BE RESET BASED ON CHILLED WATER VALVE POSITIONS TO MINIMIZE PUMP SPEED.

4. LEAD/STANDBY PUMP CONTROL

2.1 IF THE LEAD BUILDING SECONDARY CHILLED WATER PUMP FAILS TO OPERATE, THE STANDBY PUMP SHALL BE AUTOMATICALLY STARTED, AND THE SYSTEM SHALL RESUME NORMAL OPERATION. AN ALARM WILL BE GENERATED AT THE DDC PANEL TO NOTIFY OF PUMP FAILURE.

2.2 THE LEAD/STANDBY STATUS OF THE PUMPS SHALL BE ROTATED EVERY 7 DAYS FOR EVEN RUNTIME.

P

LOCATED 3 4 DOWN LONGEST

RUN.

AI5

AI5 DIFFERENTIAL PRESSURE SENSOR

180 160 140

HOT WATER SETPOINT

(DEG F)

OUTDOOR

AIR

TEMPERATURE

(DEG F)

HEATING HOT WATER RESET

SCHEDULE

HOT WATER PUMP START/STOPDO1

HOT WATER PUMP START/STOPDO2

F

D C

B G

Alexandria, Louisiana

A&E Design - Upgrade Energy Management Control Systems

October 30, 2013

VA256-12-C-0253

VETERANS HEALTH CARE

SYSTEM

Alexandria, LA

A

U.S. Department of Veterans Affairs

VAV, FCU & 9EF-4 CONTROL

SCHEMATICS & SEQUENCES

9 WLP NMT

M9-204

H W

R

AI3

PANEL

DDC CONTROL

NOTES:

1. ALL CONTROL DEVICES ARE EXISTING JCI PNEUMATIC TO

BE REPLACED WITH DDC DEVICE TO FULLY INTEGRATE TO

SIEMENS CAMPUS SYSTEM.

2. 3-WAY HW VALVE TO BE REPLACED WITH 2-WAY.

3. PROVIDE NEW CONTROLLER. CONNECT NEW

CONTROLLER TO EXISTING ELECTRICAL SERVICE.

AO2

AI4

SEQUENCE OF OPERATION

1. OCCUPIED MODE

1.1. A SPACE SENSOR SHALL TRANSMIT ROOM TEMPERATURE TO THE BOX CONTROLLER,

WHICH SHALL VARY THE PRIMARY AIRFLOW AND VARY HEATING VALVE TO MAINTAIN

SPACE TEMPERATURE SETPOINTS.

1.2. A RISE IN SPACE TEMPERATURE ABOVE SETPOINT SHALL MODULATE PRIMARY

AIRFLOW TO MAXIMUM CFM INTO THE SPACE. A DROP IN SPACE TEMPERATURE ABOVE

SETPOINT SHALL MODULATE PRIMARY AIRFLOW TO MINIMUM CFM SETPOINT. A

FURTHER DROP IN SPACE TEMPERATURE SHALL MODULATE THE BOX REHEAT

CONTROL VALVE OPEN TO HEAT THE SPACE TO MAINTAIN SETPOINT +/- 0.5°F

(ADJUSTABLE). THE ADJUSTABLE TOLERANCE OF +/- 0.5°F HAS BEEN SELECTED TO

PREVENT VALVE HUNTING.

2. UNOCCUPIED MODE

2.1. WHEN THE SYSTEM IS INDEXED TO UNOCCUPIED MODE, THE AIR HANDLING UNIT

SHALL STOP, THE BOX DAMPER SHALL CLOSE AND THE REHEAT VALVE SHALL CLOSE.

IF THE SPACE TEMPERATURE FALLS BELOW THE NIGHT SETBACK POINT, THE AIR

HANDLING UNIT SHALL START, THE VAV BOX DAMPER SHALL OPEN, AND THE HEATING

VALVE SHALL OPEN TO ALLOW THE AIR HANDLING UNIT TO HEAT THE SPACE TO

UNOCCUPIED HEATING SETPOINT. IF THE SPACE TEMPERATURE RISES ABOVE THE

NIGHT CYCLE SETPOINT, THE AIR HANDLING UNIT SHALL START AND THE BOX

CONTROLLER SHALL VARY THE PRIMARY AIRFLOW TO COOL THE SPACE TO

UNOCCUPIED COOLING SETPOINT. A PUSH-BUTTON OVERRIDE ON THE SPACE

THERMOSTAT SHALL ALLOW OCCUPANTS TO INDEX THE SYSTEM TO OCCUPIED MODE

FOR AFTER-HOURS USE. THE BOX CONTROLLER SHALL FUNCTION PER OCCUPIED

MODE OF OPERATION UNTIL THE TEMPORARY OCCUPANCY TIMER EXPIRES, AT WHICH

TIME THE BOX CONTROLLER SHALL INDEX TO UNOCCUPIED MODE, SUBJECT TO TIME

OF DAY SCHEDULING.

3. MORNING WARM-UP MODE

3.1. WHEN THE SYSTEM IS INDEXED TO THE MORNING WARM-UP, THE SYSTEM SHALL SET

THE SPACE SENSOR TO ITS OCCUPIED HEATING TEMPERATURE. THE BOX

CONTROLLER SHALL INDEX THE PRIMARY AIRFLOW TO 100%, THE HEATING VALVE

SHALL OPEN AND ALLOW PRIMARY AIR TO HEAT THE SPACE WHEN THE RESPECTIVE

AIR HANDLING UNIT IS CYCLED TO MORNING WARM-UP. THE DAMPER AND HEATING

VALVE SHALL CLOSE WHEN THE SPACE IS SATISFIED AND THE AIR HANDLING UNIT IS

STILL IN WARM-UP MODE. WHEN THE AIR HANDLING UNIT RETURNS TO OCCUPIED

OPERATION, THE BOX SHALL INDEX TO OCCUPIED MODE OF OPERATION.

COIL

V-1

NC

REHEAT

T-2T

SPACE

THERMOSTAT

AI2

AI1

AI3

INLET AIR TEMPERATURE (T-1)

REHEAT CONTROL VALVE STATUS (V-1)

DAMPER STATUS

AO1 DAMPER STATUS

COIL

H W

R

V-2

NC

HTG

AI1

DO1

PANEL

DDC CONTROL

DI4

NOTES:

1. ALL CONTROL DEVICES ARE EXISTING JCI

PNEUMATIC TO BE REPLACED WITH DDC DEVICE

TO FULLY INTEGRATE TO SIEMENS CAMPUS

SYSTEM.

2. EXISTING 3-WAY HW & CHW VALVES TO BE

REPLACED WITH 2-WAY.

3. PROVIDE NEW CONTROLLER. CONNECT NEW

CONTROLLER TO EXISTING ELECTRICAL SERVICE.

AO1

T-4T

AI4

STR

COIL

C H

W R

V-1

NC

CLG

AI2

AO2

SEQUENCE OF OPERATION

1. START/STOP CONTROL: FAN COIL SHALL OPERATE AS SET BY ECC. FAN SHALL RUN CONTINUOUSLY IN OCCUPIED MODE. THE UNIT FAN SHALL BE STARTED AND STOPPED VIA AN ASC THROUGH THE ECC.

WHEN FAN RUN STATUS IS PROVEN VIA A CURRENT SENSING RELAY, THE CONTROL LOOPS SHALL BE ENERGIZED. STOPPING THE UNIT SHALL DE-ENERGIZE THE CONTROL LOOPS AND HEATING HOT WATER

AND CHILLED WATER VALVES SHALL GO TO THE CLOSED POSITION.

2. SAFETIES: A RETURN AIR HIGH LIMIT THERMOSTAT IN THE RETURN AIR SHALL STOP THE UNIT UPON DETECTION OF TEMPERATURE ABOVE ITS SETPOINT. FIRESTATS SHALL BE PROVIDED FOR ANY FAN HANDLING 600 CFM OR MORE. FIRESTATS SHALL STOP ASSOCIATED FAN ON A RISE IN AIR TEMPERATURE ABOVE 125°F. LOW LIMIT THERMOSTAT IN THE RETURN AIR SHALL STOP THE UNIT UPON DETECTION OF

TEMPERATURE BELOW ITS SETPOINT.

3. TEMPERATURE CONTROL: SPACE TEMPERATURE SENSOR LOCATED AS SHOWN ON THE PLANS SHALL TRANSMIT TEMPERATURE CHANGES TO THE ASC. THE ASC SHALL MODULATE THE CHILLED WATER AND HEATING HOT WATER VALVES IN SEQUENCE TO MAINTAIN SPACE SETPOINT. AN ALARM MESSAGE SHALL BE GENERATED IN THE EVENT THE UNIT FAILS TO RUN BETWEEN THE RANGE OF 70°F-75°F (ADJUSTABLE) SPACE TEMPERATURE BOTH CHILLED AND HOT WATER VALVES SHALL BE CLOSED. UPON RISE IN TEMPERATURE ABOVE 75°F, THE CHILLED WATER VALVE SHALL MODULATE OPEN TO MAINTAIN 75°F (ADJUSTABLE). UPON A FALL IN TEMPERATURE BELOW 70°F, THE HEATING HOT WATER VALVE SHALL

MODULATE TO OPEN TO MAINTAIN 70°F (ADJUSTABLE).

4. FILTER STATUS SHALL BE MONITORED AT EACH FILTER BANK.

SPACE

THERMOSTAT

HEATING HOT WATER CONTROL VALVE (V-1)

CHILLED WATER CONTROL VALVE (V-2)AI2

AI1

HIGH LIMIT TEMPERATURE SENSOR (T-1) STATUSDI1

AO1

A02

UNIT FAN START/STOPDO1

HEATING HOT WATER CONTROL VALVE (V-1)

CHILLED WATER CONTROL VALVE (V-2)

FAN DISCHARGE AIR TEMPERATURE SENSOR (T-3)AI3

A

IR

F L O

W (C

F M

ROOM TEMPERATURE (°F)

HEATING

MINIMUM

VAV BOX CONTROL SEQUENCE

SP

NO DEADBAND

100% R

EH

EAT FLO

W

VAV A

IR

F

LO

W

T

T-1

AI2

AO1

M

AI1

DI3

T-2

T

DPS-1

DI2DI1

T-1

T T

T-3

AI3

G&B FAN COIL UNITS SCHEDULE

UNIT

SYMBOL

HW

GPM

CHW

GPM

O.A.

CFM

FAN

CFM

SPACE TEMPERATURE SENSOR (T-4)AI4

AIR FILTER STATUS (DPS-1)DI2

LOW LIMIT TEMPERATURE SENSOR (T-1) STATUSDI3

UNIT FAN STATUSDI4

AI1

PANEL

DDC CONTROL

AO1

AI3

COIL

V-1

NC

T-1T

SPACE

THERMOSTAT

T

DO1

DI2

STR

H W

R

HEATING

DPS-1

DI1

HOT WATER CONTROL VAVLE (V-1)

CHILLED WATER CONTROL VALVE (V-2)AI2

AI1

AIR FILTER STATUS (DPS-1)DI1

AO1

UNIT FAN START/STOPDO1

HOT CONTROL VALVE (V-1)

SPACE TEMPERATURE SENSOR (T-1)AI3

UNIT FAN STATUSDI2

RETURN

AIR

SUPPLY

AIR

OUTSIDE

AIR

NOTES:

1. ALL CONTROL DEVICES ARE EXISTING PNEUMATIC TO BE

REPLACED WITH DDC DEVICE TO FULLY INTEGRATE TO

SIEMENS CAMPUS SYSTEM.

2. EXIST 3-WAY HW/CHW VALVES TO BE REPLACED WITH

2-WAY.

3. PROVIDE NEW CONTROLLER. CONNECT NEW

CONTROLLER TO EXISTING ELECTRICAL SERVICE.

PANEL

DDC CONTROL

EF9-4

DI1

DO1

EXHAUST FAN (EF9-4) STATUSDI1

EXHAUST FAN (EF9-4) START/STOPDO1

SEQUENCE OF OPERATION

1. START/STOP CONTROL

1.1. FAN TO RUN ON SCHEDULE (CONTINUOUSLY.)

1.2. FAN TO STOP WHEN SMOKE DAMPER CLOSES.

2. ALARM

2.1. ALARM SHALL BE GENERATED WHEN STATUS

DOES NOT MATCH COMMAND.

SMOKE

DAMPER

NOTES:

1. ALL CONTROL DEVICES ARE EXISTING

PNEUMATIC TO BE REPLACED WITH DDC

DEVICE TO FULLY INTEGRATE TO SIEMENS

CAMPUS SYSTEM.

DI2

SMOKE DAMPER STATUSDI2

PANEL

DDC CONTROL

DAMPER STATUSAI1

DAMPER STATUSAO1

SEQUENCE OF…