36C25618U0323-0002012.pdf

EXISTING

7-AC111

EXISTING

7-AC115

M A

T C

H L

IN

E

S E

E S

H E

E T

M -1 b D

E T

A

IL

F

O R

C O

N T

IN

U

A T

IO

N

M A

T C

H L

IN

E

- S

E E

S H

E E

T M

-1 a D

E T

A

IL

F

O R

C O

N T

IN

U

A T

IO

N

EXISTING 0.5 HP EXHAUST

FAN (7EF-141) TO REMAIN

ON STANDALONE

CONTROLS

EXISTING UNIT

HEATER TO REMAIN

ON STANDALONE

CONTROLS

EXISTING EXHAUST

FAN (7EF-138)

INTERLOCKED

WITH 7-AHU105

EXISTING AHU HAS

PNEUMATIC CONTROLS.

CONVERT TO DDC &

CONNECT TO CAMPUS DDC

SYSTEM.

EXISTING AHU ON SIEMENS

CAMPUS SYSTEM. MIGRATE

TO NEW SERVER &

COMMUNICATIONS NETWORK.

EXISTING

EXHAUST FAN

(7-EF#4)

EXISTING

EXHAUST FAN

(7-EF#1)

EXISTING

EXHAUST FAN

(7-EF#2)

EXISTING

EXHAUST FAN

(7-EF#3)

ON EXISTING DDC

CONTROLS. FULLY

INTEGRATE WITH

SIEMENS CAMPUS

SYSTEM.

M

EXISTING

7-AC113

M A

T C

H L

IN

E

S E

E S

H E

E T

M -1 a D

E T

A

IL

F

O R

C O

N T

IN

U

A T

IO

N

EXISTING 0.5 HP EXHAUST FAN

(7EF-139) TO REMAIN ON

STANDALONE CONTROLS

EXISTING UNIT

HEATER TO REMAIN

ON STANDALONE

CONTROLS

EXISTING EXHAUST FAN

(7EF-136) INTERLOCKED

WITH 7-AHU113

EXISTING

7-AC116

KEYNOTES:

PROVIDE NEW DDC CONTROL PANEL.

CONTRACTOR SHALL PROVIDE 120V POWER

CONNECTION TO NEW CONTROL PANEL.

CONTRACTOR SHALL ROUTE TO NEAREST 120V

PANEL WITH SPARE CAPACITY, INSTALL NEW

20A-1 POLE CIRCUIT BREAKER, & MAKE

CONNECTION. PROVIDE 20A SNAP SWITCH AT

DDC PANEL FOR DISCONNECT. CONTRACTOR TO

VERIFY 120V PANEL LOCATION DURING PRE-BID

WALKTHROUGH.

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

NORTH & SOUTH SIDES PENTHOUSE

FLOOR PLANS - MECHANICAL

7 WLP NMT

M7-105b 10-30-13

ZONE THERMOSTAT/HUMIDITY AIR SENSOR

OUTSIDE AIR

DPS-1

T/H-2

L P

S

V-1

NO

VFD

AI11

AO4

AI5

AO1

DI5DI2DI1

DO1

AI16

DI4

DO2

NC

PANEL

DDC CONTROL

T-3

NC

D-1

D-2

NO

C H

W R

V-2

AI7

AO2

L P

S

V-3NO

AI9

AO3

T

AI1

T-1

DI6

DO3

NC

DPS-2

DI3

AI8

T-5

DI7

H-2

SPS-1 SPS-3

AI16

AIR FILTER

F-1

AI2

AI6

T-4

AI10

T-6

L P

S

V-4NC

AI12

AO5

DI9

SD-1

DI8

SPS-2

AI15

AI15

SEQUENCE OF OPERATION

1. SUPPLY FAN START/STOP CONTROL

1.1. UNIT IS NORMALLY STARTED AND STOPPED REMOTELY AT THE ECC VIA SCHEDULING. VFD SWITCH SHALL BE KEPT IN THE "AUTO" POSITION. "BYPASS" AND "OFF" POSITIONS SHALL BE USED ONLY FOR MAINTENANCE. WHEN FAN RUN STATUS IS PROVEN VIA A CURRENT SENSING RELAY AND WHEN THE DAMPER END SWITCH IS PROVEN OPEN STATUS, THE CONTROL SEQUENCE SHALL BEING. IF THE SUPPLY FAN STATUS DOES NOT MATCH THE COMMANDED VALUE, AN ALARM SHALL BE GENERATED.

1.2. THE ROOF-MOUNTED EXHAUST FAN 7-EF106, 7-EF120, 7-EF121, 7-EF122, & 7-EF123 SHALL BE INTERLOCKED TO OPERATE WITH 7-AHU106. WHEN THE SUPPLY FAN IS ON, THE EXHAUSTED FAN

SHALL BE ENABLED.

2. STATIC PRESSURE CONTROL

2.1. SUPPLY FAN SHALL MODULATE TO MAINTAIN THE DISCHARGE STATIC PRESSURE AT SETPOINT IN ORDER TO MAINTAIN CONSTANT AIRFLOW. AS UNIT FILTRATION SECTIONS BEGIN CLEAN AND LOAD TO DIRTY, THE VFD WILL MODULATE TO MAINTAIN PRESSURE AS SENSED BY THE DUCT PRESSURE

SENSOR LOCATED 2

3 DOWN MAIN DUCT.

3. AIRFLOW CONTROL

3.1. THE SUPPLY AIR FLOW SHALL BE CONTROLLED BY THE DIGITAL CONTROL PANEL MODULATING THE

SUPPLY FAN ADJUSTABLE SPEED MOTOR CONTROLLER TO MAINTAIN A CONSTANT OUTSIDE

AIRFLOW QUANTITY AS SCHEDULED. OUTSIDE AIR SHALL BE METERED TO MONITOR AND MAINTAIN

CONSTANT O.A. AIRFLOW BY MODULATING THE OUTSIDE AIR CONTROL DAMPERS AND THE VFD.

4. DISCHARGE AIR TEMPERATURE CONTROL

4.1. THE DISCHARGE AIR TEMPERATURE SETPOINT SHALL RESET AS NECESSARY TO MAINTAIN THE ZONE

TEMPERATURE SETPOINT AS SENSED BY THE ZONE TEMPERATURE SENSOR. THE 2-WAY PREHEAT

FACE & BYPASS VALVE, THE 2-WAY REHEAT VALVE, AND THE 2-WAY COOLING VALVE SHALL

MODULATE IN SEQUENCE TO MAINTAIN THE SUPPLY AIR TEMPERATURE SETPOINT. ZONE

TEMPERATURE SENSOR LOCATED IN SPACE SHALL INDICATE TEMPERATURE TO EEC.

5. PREHEAT FACE & BYPASS CONTROL

5.1. THE PREHEAT FACE & BYPASS DAMPER SHALL REMAIN OPEN TO THE FACE WHEN THE PREHEAT VALVE IS MODULATING. IF THE SHARED OUTSIDE AIR TEMPERATURE FALLS BELOW THE SETPOINT, THE PREHEAT VALVE SHALL BE COMMANDED FULLY OPEN, AND THE PREHEAT FACE & BYPASS

DAMPER SHALL MODULATE.

6. HUMIDIFICATION CONTROL

6.1. THE REMOTE STEAM-TO-STEAM HUMIDIFIER SHALL BE ENABLED, AND PLANT STEAM VALVE SHALL MODULATE TO SUPPLY "CLEAN" STEAM TO AHU MOUNTED STEAM MANIFOLD REQUIRED TO MAINTAIN THE ZONE RELATIVE HUMIDITY SETPOINT OF 30% (ADJUSTABLE AT ECC) AS SENSED BY THE ZONE RELATIVE HUMIDITY SENSOR. THE HUMIDITY HIGH LIMIT CONTROLLER SHALL OVERRIDE THE OUTPUT

IF NECESSARY TO PREVENT THE SUPPLY AIR HUMIDITY FROM EXCEEDING 85% RH. NORMALLY

CLOSED HUMIDIFIER STEAM SUPPLY VALVES SHALL OPEN WHEN OUTSIDE AIR TEMPERATURE DROPS BELOW 60°F AND SHALL CLOSE ABOVE 62°F OUTSIDE AIR TEMPERATURE OR WHEN SUPPLY FAN IS

OFF.

7. DEHUMIDIFICATION CONTROL

7.1. IF THE RELATIVE HUMIDITY IN THE ZONE RISES ABOVE SETPOINT OF 50% RH (ADJUSTABLE AT ECC), THE CHILLED WATER VALVE SHALL MODULATE TO MAINTAIN THE DEHUMIDIFICATION SETPOINT. THE

REHEAT COIL VALVE SHALL MODULATE TO MAINTAIN THE DISCHARGE AIR TEMPERATURE AT

SETPOINT.

8. FILTER STATUS

8.1. FILTER STATUS SHALL BE MONITORED AT EACH PRE-FILTER AND AFTER-FILTER BANK.

9. FREEZE PROTECTION

9.1. IF THE AIR TEMPERATURE AS SENSED BY PREHEATED MIXED AIR SENSOR (FREEZESTAT) UPSTREAM OF COOLING COIL FALLS BELOW 45°F, AN ALARM SIGNAL SHALL INDICATE AT THE ECC. IF THIS TEMPERATURE FALLS BELOW 40°F, AS SENSED BY THE LOW TEMPERATURE SWITCH, THE SUPPLY FAN SHALL SHUT DOWN AND A CRITICAL ALARM SHALL INDICATE AT THE DIGITAL CONTROL PANEL

AND ECC. THE LOW TEMPERATURE CUT-OUT SHALL BE HARDWIRED TO THE SUPPLY FAN VFD SO

THAT THE UNIT SHALL BE SHUTDOWN IN HAND, AUTO, OR BYPASS MODE WHENEVER THERE IS A LOW TEMPERATURE ALARM. THE LOW TEMPERATURE CUT-OUT REQUIRE MANUAL RESET AT THE DEVICE.

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

10' MIN. BETWEEN

HUMIDIFIER AND

ELEMENT

HUMIDIFIER

T/H

SUPPLY

FAN

CLG

COIL

STEAM

REHEAT

COIL

STEAM

PREHEAT

COIL

T T T T H

OUTSIDE AIR FLOWMETER (F-1)

INTAKE AIR TEMPERATURE SENSOR (T-1)

COOLING COIL DISCHARGE AIR TEMPERATURE SENSOR (T-5)

REHEAT COIL STEAM CONTROL VALVE (V-3)

LOCAL DDC CONTROLLER

AI2

AI9

AI8

AI1

AI4

AI5

AI6

AI7

INTAKE AIR HUMIDITY SENSOR (H-1)AI3

MIXED AIR TEMPERATURE SENSOR (T-2)

STEAM PREHEAT CONTROL VALVE (V-1)

PREHEAT COIL DISCHARGE AIR TEMPERATURE SENSOR (T-4)

COOLING COIL STEAM CONTROL VALVE (V-2)

AIR FILTER STATUS (DPS-2)

DI1

HOT/COLD FACE DAMPER (D-2) STATUS

LOW LIMIT TEMPERATURE SENSOR (T-2) STATUS

OUTSIDE AIR DAMPER (D-1) STATUS

DI2 AIR PRE-FILTER STATUS (DPS-1)

DI3

DI4

DI5

DO1

AO1

AO2

AO3 REHEAT COIL STEAM CONTROL VALVE (V-3)

PREHEAT COIL STEAM CONTROL VALVE (V-1)

CHILLED WATER CONTROL VALVE (V-2)

OUTSIDE AIR DAMPER (D-1)

DO2 HOT/COLD FACE DAMPER (D-2) STATUS

DI6

7EF-120 STATUS

SUPPLY FAN STATUS

DI7

SUPPLY AIR SMOKE DETECTOR STATUS (SD-1)DI8

DI9

DI10

DI11

HIGH LIMIT HUMIDITY SENSOR (H-1) STATUS

AO4

AO5 HUMIDIFIER STEAM CONTROL VALVE (V-4)

SUPPLY FAN VFD SPEED

DO3 SUPPLY FAN START/STOP

7EF-106 STATUS

AIR PRE-FILTER

SYSTEM STATIC PRESSURE SENSOR (SPS-3)

ZONE THERMOSTAT (T/H-2)AI17

AI16

AI11

AI12

AI13

AI14

REHEAT COIL DISCHARGE AIR TEMPERATURE SENSOR (T-6)AI10

SUPPLY FAN VFD SPEED

HUMIDIFIER STEAM CONTROL VALVE (V-4)

AHU DISCHARGE AIR TEMPERATURE SENSOR (T-7)

DISCHARGE AIR HUMIDITY SENSOR (H-3)

SEQUENCE OF OPERATION (CONT.)

10. HIGH DUCT STATIC PROTECTION

10.1. A DUCT HIGH PRESSURE SENSOR LOCATED AT THE SUPPLY FAN DISCHARGE SHALL PREVENT THE SUPPLY FAN FROM DEVELOPING OVER 3" OF STATIC PRESSURE (FIELD ADJUSTABLE) IN THE SUPPLY DUCT. IF STATIC PRESSURE DOES EXCEED SET LIMIT, THE SUPPLY FAN SHALL STOP. DUCT HIGH

PRESSURE SENSOR SHALL BE HARDWIRED TO THE SUPPLY FAN VFD AND THE UNIT SHALL BE

SHUTDOWN IN HAND, AUTO OR BYPASS MODE WHENEVER THERE IS A HIGH DUCT PRESSURE ALARM.

THE DUCT HIGH STATIC PRESSURE SENSOR SHALL REQUIRE MANUAL RESET AT DEVICE.

11. SMOKE PROTECTION AND AUTOMATIC SHUTDOWN/RESTART

11.1. A SUPPLY AIR SMOKE DETECTOR IN THE SUPPLY AIR DUCT SHALL STOP THE UNIT SYSTEM UPON DETECTION OF PRODUCTS OF COMBUSTION IN THE DUCT AND CLOSE THE UNIT ISOLATION SMOKE DAMPERS LOCATED IN SUPPLY AND RETURN DUCT MAINS ADJACENT TO THE UNIT. EXHAUST FANS SERVING THE AREA OF THE SUPPLY FAN SHALL CONTINUE TO RUN. WHEN THE SYSTEM IS RESET, THE SUPPLY FAN SHALL RESTART AND SMOKE DAMPERS SHALL OPEN.

12. HIGH TEMPERATURE LIMIT SWITCH / FIRESTAT

12.1. THE HIGH TEMPERATURE LIMIT SWITCH SHALL BE PROVIDED IN THE SUPPY DUCT TO STOP THE

SUPPLY FAN ON A RISE IN AIR TEMPERATURE ABOVE 125°F.

13. SMOKE PURGE CYCLE

13.1. THE AIR HANDLING UNIT SUPPLY FAN AND EXHAUST FAN (7-EF-106) SHALL BE INCLUDED IN A MANUAL

SMOKE PURGE CYCLE. DURING THIS CYCLE, THE SMOKE DETECTION CONTROL SEQUENCE IS

OVERRIDDEN. A MANUAL 0-60 MINUTE TIMER OPENS THE AHU OUTSIDE AIR DAMPER, AND AFTER THE END SWITCH PROVES THE OUTSIDE AIR DAMPER IS OPEN, THE AHU SUPPLY FAN SHALL START AND THE ASSOCIATED LAB GENERAL EXHAUST FAN, WITH ITS INTEGRAL MOTORIZED DAMPER OPENED, SHALL START. UPON COMPLETION OF SMOKE PURGE CYCLE, ALL CONTROLS SHALL REVERT TO

NORMAL OPERATION.

14. SAFETIES

14.1. ALL OF THE SAFETY DEVICES ARE MANUAL RESET. THE DEVICE THAT HAS TRIPPED MUST BE

MANUALLY RESET BEFORE RESTARTING THE AHU.

14.2. IF A TEMPERATURE LOW LIMIT SWITCH SENSES A TEMPERATURE BELOW SETPOINT THE SUPPLY FAN

SHALL BE SHUTDOWN.

14.3. IF A TEMPERATURE HIGH LIMIT SWITCH SENSES A TEMPERATURE ABOVE SETPOINT THE SUPPLY FAN

SHALL BE SHUTDOWN.

14.4. IF STEAM IS NOT PRESSENT IN PREHEAT COIL, I.E. THERE IS NO TEMPERATURE RISE ACROSS

PREHEAT COIL UPON A CALL FOR HEAT, THE SUPPLY FAN SHALL BE SHUTDOWN.

14.5. IF A FIRE ALARM SHUTDOWN CONTACT IS SENSED, THE SUPPLY FAN SHALL BE SHUTDOWN WHEN

TRIGGERED.

15. SHUTDOWN

15.1. WHEN THE UNIT IS SHUTDOWN BY EITHER A STOP COMMAND OR SYSTEM SAFETY, THE UNIT SHALL

BE SET AS FOLLOWS:

15.1.1. SUPPLY FAN SHALL BE OFF

15.1.2. OUTSIDE AIR DAMPER SHALL CLOSE

15.1.3. HUMIDIFIER SHALL BE OFF AND COMMANDED TO 0%

15.1.4. PREHEAT FACE & BYPASS SHALL REMAIN IN CONTROL

15.1.5. PREHEAT VALVE SHALL REMAIN IN CONTROL

15.1.6. COOLING VALVE SHALL CLOSE

7-AHU106 CONTROL SCHEMATIC

& SEQUENCE

7 WLP NMT

M7-200

T

AI1

T-1

H

AI3

H-1

T

AI4

T-2

AI13

T-7

T

AI14

H-3

H

NOTES:

1. ALL CONTROL DEVICES ARE EXISTING DDC. SENSORS, ACTUATORS, ETC.

MAY BE REUSED IF FUNCTIONAL AND COMPATIBLE.

2. DDC CONTROLLER AND ZONE TEMPERATURE/HUMIDITY SENSOR SHALL

BE REPLACED. CONNECT NEW CONTROLLER TO EXISTING ELECTRICAL

SERVICE.

DI10

DO4

7EF-106

SUPPLY

AIR

DI11

DO5

7EF-120

DI12

DO6

7EF-121

DI13

DO7

7EF-122

DI14

DO8

7EF-123

DO4 7EF-106 START/STOP

DO5 7EF-120 START/STOP

DO6 7EF-121 START/STOP

DO7 7EF-122 START/STOP

DO8 7EF-123 START/STOP

AI15 AHU DISCHARGE STATIC PRESSURE SENSOR (SPS-2)

ZONE HUMIDITY AIR SENSOR (T/H-2)AI18

SUPPLY FAN DISCHARGE HIGH LIMIT STATIC PRESSURE SENSOR (SPS-1) STATUS

LOCAL DDC CONTROLLER

7EF-122 STATUS

DI12

DI13

7EF-121 STATUS

7EF-123 STATUSDI14

COIL

L P

S

NCOUTSIDE AIR

D-1

DPS-3V-1

NO

HTG

C W

R

PANEL

DDC CONTROL

SUPPLY

COIL

CLG

V-2

NC STR

FAN

T-2

EXHAUST

DO3

DI6

AO1

AI6 DI7AI2 AI5 AI9

AO3AO2

AI4

SPS-1

T-1

AI1

H-1

H

SPS-2

DO1

DI1

D-2

NC

AI10

RETURN

SUPPLY

SEQUENCE OF OPERATION

1. GENERAL

1.1. TEMPERATURE SENSOR (T-2) THROUGH RECEIVER CONTROLLER SHALL MODULATE NORMALLY CLOSED CHILLED WATER COOLING COIL CONTROL VALVE (V-2) AND NORMALLY OPEN STEAM HEATING COIL CONTROL VALVE (V-1) IN SEQUENCE TO MAINTAIN DISCHARGE TEMPERATURE. HUMIDITY SENSOR (H-1) SHALL MAINTAIN SPACE HUMIDITY BY MODULATING HUMIDIFIER VALVE (V-3) SUBJECT TO HIGH LIMIT HUMIDISTAT (H-2) SET AT 90% RH. NORMALLY CLOSE HUMIDIFIER STEAM SUPPLY VALVE (V-3) SHALL OPEN OA TEMPERATURE (T-2) DROPS BELOW 60°F AND SHALL CLOSE ABOVE 62°F OA TEMPERATURE (T-2) OR WHEN SUPPLY FAN IS OFF. TEMPERATURE SWITCH SHALL KEEP HUMIDIFIER VALVE (V-3) CLOSED UNTIL CONDENSATE DROP LEG REACHES OPERATING TEMPERATURE. NORMALLY CLOSED DAMPERS (D-1, D-2, & D-3) SHALL OPEN UPON SIGNAL FOR SUPPLY FAN TO START. SUPPLY FAN SHALL START WHEN END SWITCH ON OA DAMPER (D-2) PROVES FULL OPEN AND INTERLOCK SHALL START EXHAUST FAN. WHEN ENERGIZED, SMOKE DETECTORS SD-1 & SD-2 SHALL STOP SUPPLY AND EXHAUST FANS, SHALL CLOSE DAMPERS D-1, D-2, & D-3 AND SHALL SIGNAL FIRE ALARM. DAMPER D-4 SHALL MODULATE TO MAINTAIN SUPPLY DUCT MAIN STATIC PRESSURE (SPS-2) AND SHALL BE FULL OPEN WITH BOTH PRE-FILTER (DPS-1 & DPS-2) AND AFTER FILTER (DPS-3) AT DIRTY CONDITION DROP. DAMPER D-1 SHALL MODULATE TO MAINTAIN EXHAUST DUCT MAIN STATIC PRESSURE (SPS-1) AND SHALL BE FULL OPEN WITH OA PRE-FILTER

(DPS-1) DIRTY CONDITION PRESSURE DROP.

2. SMOKE PURGE

2.1. SUPPLY AND EXHAUST FAN SHALL BE INCLUDED IN A MANUAL SMOKE PURGE CYCLE, DURING WHICH THE SMOKE DETECTION CONTROL SEQUENCE IS OVERRIDDEN. MANUAL 0-60 MINUTE TIME SP-1 OPENS D-1 & D-3. AFTER END SWITCH PROVES D-3 OPEN, SUPPLY AND EXHAUST FAN SHALL START. UPON COMPLETION

OF SMOKE PURGE CYCLE, ALL CONTROLS REVERT TO NORMAL OPERATION.

T T

STR

OUTSIDE AIR TEMPERATURE SENSOR (T-1)

OUTSIDE AIR DAMPER (D-1) STATUS

SUPPLY AIR TEMPERATURE SENSOR (T-2)

SUPPLY AIR STATIC PRESSURE SENSOR (SPS-2)

LOCAL DDC CONTROLLER

AI2

AI9

AI10

AI8

AI1

AI4

AI5

AI6

AI7

RETURN AIR HUMIDITY SENSOR (H-1)AI3

RETURN AIR STATIC PRESSURE SENSOR (SPS-1)

HEATING COIL STEAM CONTROL VALVE (V-1)

CHILLED WATER CONTROL VALVE (V-2)

HUMIDIFIER STEAM CONTROL VALVE (V-3)

SUPPLY AIR DAMPER (D-3) STATUS

EXHAUST FAN A STATUS

DI1

EXHAUST SMOKE DETECTOR (SD-1) STATUS

RETURN AIR PRE-FILTER STATUS (DPS-2)

EXHAUST AIR DAMPER (D-2) STATUS

DI2 OUTSIDE AIR PRE-FILTER STATUS (DPS-1)

DI3

DI4

DI5

DO1

AO5

AO4

AO1

AO2

AO3 CHILLED WATER CONTROL VALVE (V-2)

HUMIDIFIER STEAM CONTROL VALVE (V-3)

SUPPLY AIR DAMPER (D-3) CONTROLLER

OUTSIDE AIR DAMPER (D-1) CONTROLLER

HEATING COIL STEAM CONTROL VALVE (V-1)

EXHAUST AIR DAMPER (D-2) CONTROLLER

EXHAUST

FAN

DO2 EXHAUST FAN A START/STOP

NOTES:

1. ALL EXIST SENSOSRS, CONTROL VALVES, ACTUATOR, ETC.

ARE PNEUMATIC AND TO BE REPLACED WITH NEW DDC.

2. VERIFY PROPER OPERATION OF EXIST DAMPERS AND

REPAIR/REPLACE AS NECESSARY.

3. EXHAUST FAN 7EF-136 IS INTERLOCKED TO OPERATE WITH

7-SF117, WHICH SERVES 7-AHU113.

4. EXHAUST FAN 7EF-138 IS INTERLOCKED TO OPERATE WITH

7-SF119, WHICH SERVES 7-AHU115.

5. PROVIDE NEW DDC CONTROLLER. CONNECT NEW

CONTROLLER TO EXISTING ELECTRICAL 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

7-AC113 & 7-AC115 CONTROL

SCHEMATIC & SEQUENCE

7 WLP NMT

M7-201

PIPE HEAT

EXCHANGER

DO2

DI3

AI3

NC

D-3

AI8

AO5

HUMIDIFIER

L P

S

V-3

AI7

AO4

DPS-1

DI2

SD-2

DI9

SD-1

DI4

H-2

DI8

H

DI5

DPS-2

SUPPLY FAN STATUSDI6

SUPPLY AIR AFTER FILTER STATUS (DPS-3)DI7

HIGH LIMIT HUMIDISTAT (H-2) STATUSDI8

SUPPLY AIR SMOKE DETECTOR (SD-2) STATUSDI9

NC

DO3 SUPPLY FAN START/STOP

NOTES:

1. ALL EXIST SENSORS, CONTROL VALVES, ACTUATOR, ETC. ARE

PNEUMATIC AND TO BE REPLACED WITH NEW DDC.

2. VERIFY PROPER OPERATION OF EXIST DAMPERS AND

REPAIR/REPLACE AS NECESSARY.

3. PROVIDE NEW DDC CONTROLLER. CONNECT NEW CONTROLLER TO

EXISTING ELECTRICAL SERVICE.

COIL

H W

R

NC

OUTSIDE AIR

D-1

V-1

NO

HTG

C W

R

PANEL

DDC CONTROL

SUPPLY

COIL

CLG

V-2

NC STR

FAN

RELIEF

D-3

DO2

DI3

AO1

AI8AI1 AI6AI3

AO5AO4AO3

T-1

AI4

T-2

AI5

H-1

AI7

SPS-2

AO2

AI2

D-2

NC

NO

DI4

RETURN

STR

DO1

DI1

SPS-1

DI2

OUTSIDE AIR DAMPER (D-1)

REFLIEF AIR DAMPER (D-2)

CHILLED WATER CONTROL VALVE (V-2)

LOCAL DDC CONTROLLER

AI2

AI8

AI1

AI4

AI5

AI6

AI7

RETURN AIR DAMPER (D-3)AI3

MIXED AIR TEMPERATURE SENSOR (T-1)

LOW LIMIT TEMPERATURE SENSOR (T-2) STATUS

HOT WATER CONTROL VALVE (V-1)

RETURN AIR HUMIDITY SENSOR (H-1)

SUPPLY FAN STATUS

DI1

SUPPLY AIR HIGH LIMIT STATIC PRESSURE SENSOR (SPS-2) STATUS

RETURN AIR FAN STATUS

DI2 RA HIGH LIMIT STATIC PRESSURE SENSOR (SPS-1) STATUS

DI3

DI4

DO1

AO5

AO4

AO1

AO2

AO3 RETURN AIR DAMPER (D-3) CONTROLLER

HOT WATER CONTROL VALVE (V-1)

OUTSIDE AIR DAMPER (D-1) CONTROLLER

RELIEF AIR DAMPER (D-2) CONTROLLER

RETURN AIR FAN START/STOP

CHILLED WATER CONTROL VALVE (V-2)

DO2 SUPPLY FAN START/STOP

H

T T T-4

AI10

T

T-3

AI9

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. (SINCE THE TERMINAL BOXES ARE CURRENTLY PNEUMATICALLY CONTROLLED, ONE OR MORE SPACE TEMPERATURE SENSORS NEED TO BE INSTALLED IN REPRESENTATIVE AREAS.) 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 AND NIGHT COOLING IS AVAILABLE WHEN THE SPACE TEMPERATURE RISES ABOVE 85°F. THE

LATEST START TIME IS THE SCHEDULED OCCUPANCY FOR THE SPACE.

1.4. ALL SUGGESTED SETPOINTS AND SETTINGS ARE ADJUSTABLE.

1.5. WHENEVER THE SUPPLY FAN IS DE-ENERGIZED, AS SENSED BY THE STATUS SWITCH, THE RETURN FAN SHALL BE DE-ENERGIZED, THE OUTSIDE AND RELIEF AIR DAMPERS SHALL BE CLOSED, THE RETURN AIR

DAMPER SHALL BE OPEN, AND THE HEATING AND COOLING VALVES SHALL BE CLOSED.

2. OCCUPIED MODE

2.1. ECONOMIZER CONTROL

2.1.1. WHEN OUTSIDE AIR ENTHALPY OR TEMPERATURE IS DETERMINED TO BE GREATER THAN RETURN AIR ENTHALPY OR TEMPERATURE, THE OUTSIDE AIR DRY BULB TEMPERATURE IS GREATER THAN 75°F, OR THE MIXED AIR TEMPERATURE IS LESS THAN 45°F, THE ECONOMIZER MODE IS DISABLED. THE OUTSIDE AIR DAMPER IS SET AT ITS MINIMUM OCCUPIED POSITION, THE RETURN AIR DAMPER IS

FULLY OPENED, AND THE RELIEF AIR DAMPER IS FULLY CLOSED.

2.1.2. WHEN OUTSIDE AIR ENTHALPY AND TEMPERATURE ARE DETERMINED TO BE LESS THAN RETURN AIR

ENTHALPY AND TEMPERATURE BY A PREDETERMINED OFFSET, ECONOMIZER MODE IS ENABLED.

WHEN ENABLED, THE OUTSIDE AIR, RETURN AIR, AND RELIEF AIR DAMPERS OPERATE IN

CONJUNCTION TO ATTEMPT TO MAINTAIN THE DISCHARGE AIR TEMPERATURE TWO DEGREES BELOW

ITS SETPOINT.

2.2. CHW AND HHW VALVE CONTROL

2.2.1. THE CHILLED WATER VALVE, V-2, MODULATES TO MAINTAIN THE DISCHARGE AIR AT ITS SETPOINT.

2.2.2. THE PREHEAT VALVE, V-1, MODULATES TO MAINTAIN THE DISCHARGE AIR TEMPERATURE AT 45°F, INDEPENDENT OF DISCHARGE AIR TEMPERATURE SETPOINT.

2.3. WARM-UP MODE

2.3.1. THE SUPPLY AND RETURN FANS START. THE MIXING DAMPERS ARE POSITIONED FOR 100% RETURN AIR AND COOLING COIL VALVE REMAINS CLOSED. THE HEATING COIL VALVE MODULATES TO MAINTAIN THE SUPPLY AIR TEMPERATURE SETPOINT. IF TIME REACHES THE LATEST START TIME DURING THE

WARM-UP MODE, THE OUTDOOR AIR DAMPER OPENS TO ITS MIN. POSITION.

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

2.4. COOL-DOWN MODE

2.4.1. THE SUPPLY AND RETURN FANS START. THE CHILLED WATER VALVE AND PREHEAT VALVE ARE CONTROLLED THE SAME AS IN NORMAL OCCUPIED MODE. ECONOMIZER CONTROL IS THE SAME AS IN NORMAL OCCUPIED MODE, EXCEPT THAT THE MIN. OUTSIDE AIR DAMPER POSITION IS 0% OPEN UP UNTIL TIME REACHES THE LATEST START TIME, AT WHICH TIME THE OUTSIDE AIR DAMPER MIN.

POSITION IS SET TO ITS NORMAL OCCUPIED POSITION.

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

3. UNOCCUPIED MODE

3.1. UNOCCUPIED OFF

3.1.1. THE SUPPLY AND RETURN FANS SHALL BE DE-ENERGIZED EXCEPT WHEN OPERATION IS CALLED FOR AS DESCRIBED BELOW. OUTSIDE AIR AND RELIEF DAMPERS SHALL BE CLOSED AND RETURN AIR DAMPER

OPEN.

3.1.2. WHEN THE SUPPLY FAN IS DE-ENERGIZED AND MIXED AIR TEMPERATURE IS LESS THAN THE MIXED AIR LOW TEMPERATURE PROTECTION SETPOINT OF 40°F (ADJUSTABLE), OR THE LOW TEMPERATURE LIMIT TRIPS, THEN THE PREHEAT VALVE SHALL CYCLE TO MAINTAIN A MIXED AIR TEMPERATURE OF 40°F (ADJUSTABLE).

WHEN THE MIXED AIR TEMPERATURE IS GREATER THAN THE MIXED AIR LOW TEMPERATURE PROTECTION SETPOINT OF 42°F, THE PREHEAT VALVE SHALL BE CLOSED. A DEAD BAND OF 2°F IS GIVEN TO IMPROVE

CONTROL.

3.2. NIGHT HEATING

3.2.1. THE SUPPLY AND RETURN FANS START WITH THE PREHEAT AND CHILLED WATER VALVES CLOSED, THE OUTSIDE AIR AND RELIEF DAMPERS CLOSED, AND THE RETURN AIR DAMPER OPEN TO MAINTAIN A MIN.

SPACE TEMPERATURE OF 65°F.

3.3. NIGHT COOLING

3.3.1. THE SUPPLY AND RETURN FANS START. THE CHILLED WATER VALVE AND PREHEAT VALVE ARE CONTROLLED THE SAME AS IN NORMAL OCCUPIED MODE. ECONOMIZER CONTROL IS THE SAME AS IN

NORMAL OCCUPIED MODE, EXCEPT THAT THE MIN. OUTSIDE AIR DAMPER IS 0% OPEN.

4. ALARMS

4.1. DISCHARGE HIGH STATIC CUTOUT, SMOKE DETECTORS IN THE SUPPLY AND RETURN AIR STREAMS, AND SUPPLY AND RETURN FAN VFD FAULT ALARMS DE-ENERGIZE THE SUPPLY AND RETURN FANS UPON ACTIVATION. UNDER THIS CONDITION, WHEN THE OUTSIDE AIR TEMPERATURE IS LESS THAN 45°F, THE PREHEAT VALVE MODULATES TO MAINTAIN THE MIXED AIR TEMPERATURE AT 45°F AND THE CHILLED WATER VALVE OPENS. WHEN THE OUTSIDE AIR TEMPERATURE IS 45°F OR ABOVE, THE PREHEAT VALVE AND THE CHILLED WATER VALVE CLOSE. THE OUTSIDE AIR AND RELIEF DAMPERS CLOSE AND THE RETURN AIR DAMPER OPENS.

4.2. A LOW TEMPERATURE DETECTOR IN THE DISCHARGE OF THE HEATING COIL DE-ENERGIZES THE SUPPLY AND RETURN FANS WHEN TEMPERATURES BELOW 38°F ARE SENSED. THE CHILLED WATER VALVE AND PREHEAT VALVE OPEN. THE OUTSIDE AIR AND RELIEF AIR DAMPERS CLOSE AND THE RETURN AIR DAMPER OPENS.

4.3. CURRENT SWITCHES ARE INSTALLED ON THE LOAD SIDE OF THE SUPPLY AND RETURN FAN VFDS. THE DDC SYSTEM USES THE SWITCHES TO CONFIRM THE FANS ARE 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.

SUPPLY AIR DISCHARGE TEMPERATURE SENSOR (T-4)AI10

AI9 RETURN AIR TEMPERATURE SENSOR (T-3)

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

7-AHU116 CONTROL SCHEMATIC

& SEQUENCE

7 WLP NMT

M7-202

ZONE THERMOSTAT

OUTSIDE AIR

DPS-1

T-5

L P

S

V-1

NC

VFD

AI6

AO4

AI1

AO1

DI5DI2DI1

DO1

AI9

AI11

AO6

NC

PANEL

DDC CONTROL

T-2

NC

D-1

D-2

NO

T

C H

W R

V-2

AI3

AO2

L P

S

V-3

NC

AI5

AO3 AI7

T-4 SUPPLY AIR

T

AI2

T-1 SD-1

DI8

NOTES:

1. ALL CONTROL DEVICES ARE EXISTING DDC. SENSORS, ACTUATORS, ETC

MAY BE REUSED IF FUNCTIONAL AND COMPATIBLE.

2. CONTROLLER SHALL BE REPLACED. CONNECT NEW CONTROLLER TO

EXISTING ELECTRICAL SERVICE.

3. AHU-1 IS INTERLOCKED WITH 7-PH_CH-1.

4. THE HUMIDITY HIGH LIMIT SENSOR OVERRIDES THE PLANT STEAM

VALVE TO PREVENT THE DISCHARGE AIR HUMIDITY FROM EXCEEDING

95%RH.

DI6

DO3

NC

NO

C

DPS-2

DI3

AIR

FILTER

30%

AIR

FILTER

65%

AI4

T-3

DPS-3

DI9

AIR

FILTER

95%

DPS-4

DI10

AIR

FILTER

99.97%

L P

S

DI11

H-1

10' MIN. BETWEEN

HUMIDIFIER AND

ELEMENT

SPS-1

DI7

SPS-2

AI8

HUMIDIFIER

SEQUENCE OF OPERATION

1. SUPPLY FAN START/STOP

1.1. THE SUPPLY FAN SHALL BE STARTED ACCORDING TO THE SCHEDULE. AFTER THE START COMMAND IS SENT, THE OUTSIDE AIR DAMPER SHALL OPEN, AND THE UNIT SHALL START WHEN THE DAMPER

END SWITCH HAS PROVEN OPEN STATUS.

1.2. IF THE SUPPLY FAN STATUS DOES NOT MATCH THE COMMANDED VALUE, AN ALARM SHALL BE

GENERATED.

1.3. WHEN THE SUPPLY FAN STATUS INDICATES THE FAN STARTED, THE CONTROL SEQUENCE SHALL BE

ENABLED.

1.4. 7-EF#1 SHALL BE INTERLOCKED TO OPERATE WHEN AHU#7-1.

2. STATIC PRESSURE CONTROL

2.1. SUPPLY FAN SHALL MODULATE TO MAINTAIN THE DISCHARGE STATIC PRESSURE AT SETPOINT IN ORDER TO MAINTAIN CONSTANT AIRFLOW. AS UNIT FILTRATION SECTIONS BEGIN CLEAN AND LOAD

TO DIRTY, VIA UNIT MOUNTED VFD AND DUCT PRESSURE SENSOR LOCATED 2

3 DOWN DUCT MAIN.

3. SUPPLY AIR CONTROL

3.1. THE SUPPLY AIR TEMPERATURE SETPOINT SHALL RESET AS NECESSARY TO MAINTAIN THE ZONE TEMPERATURE SETPOINT AS SENSED BY THE ZONE TEMPERATURE SENSOR. THE PREHEAT FACE & BYPASS, REHEAT VALVE, AND COOLING VALVE SHALL MODULATE IN SEQUENCE TO MAINTAIN THE

DISCHARGE AIR TEMPERATURE AT SETPOINT.

4. ECONOMIZER DRY BULB SWITCHOVER

4.1. WHEN THE SHARED OUTSIDE AIR TEMPERATURE IS BELOW THE SWITCHOVER SETPOINT OF 48°F, THE ECONOMIZER SHALL BE ENABLED WHEN THE SHARED OUTSIDE AIR TEMPERATURE RISES

ABOVE THE SWITCHOVER SETPOINT PLUS A DIFFERENTIAL, THE ECONOMIZER SHALL BE DISABLED.

5. PREHEAT FACE & BYPASS

5.1. THE PREHEAT FACE & BYPASS DAMPER SHALL REMAIN OPEN TO THE FACE WHEN THE PREHEAT VALVE IS MODULATING. IF THE SHARED OUTSIDE AIR TEMPERATURE FALLS BELOW THE SETPOINT

THE PREHEAT VALVE SHALL BE COMMANDED FULLY OPEN AND THE PREHEAT FACE & BYPASS

DAMPER SHALL MODULATE.

6. HUMIDIFICATION

6.1. THE REMOTE STEAM-TO-STEAM HUMIDIFER SHALL BE ENABLED AND PLANT STEAM VALVE SHALL MODULATE TO SUPPLY "CLEAN" STEAM TO AHU MOUNTED STEAM MANIFOLD REQUIRED TO MAINTAIN

THE ZONE RELATIVE HUMIDITY SETPOINT AS SENSED BY THE ZONE HUMIDITY SENSOR. THE

HUMIDITY HIGH LIMIT CONTROLLER SHALL OVERRIDE THE OUTPUT IF NECESSARY TO PREVENT THE

DISCHARGE AIR HUMIDITY FROM EXCEEDING 85% RH.

7. DEHUMIDIFICATION

7.1. IF THE RELATIVE HUMIDITY IN THE ZONE RISES ABOVE SETPOINT, THE CHILLED WATER VALVE SHALL MODULATE OPEN TO MAINTAIN THE DEHUMIDIFICATION SETPOINT. THE REHEAT COIL VALVE SHALL

MODULATE TO MAINTAIN THE SUPPLY AIR TEMPERATURE AT SETPOINT.

8. SAFETIES

8.1. ALL OF THE SAFETY DEVICES ARE MANUAL RESET, I.E. THE DEVICE THAT HAS TRIPPED MUST BE

MANUALLY RESET BEFORE RESTARTING THE AHU.

8.2. IF A TEMPERATURE LOW LIMIT SWITCH SENSES A TEMPERATURE BELOW SETPOINT, THE SUPPLY

FAN SHALL BE SHUTDOWN.

8.3. IF STEAM IS NOT PRESENT IN THE PREHEAT COIL AND THERE IS NOT A TEMPERATURE RISE ACROSS

THE PREHEAT COIL UPON A CALL FOR HEAT, THE SUPPLY FAN SHALL SHUT DOWN.

8.4. IF A FIRE ALARM SHUTDOWN CONTACT IS PROVIDED, THE SUPPLY FAN SHALL BE SHUT DOWN.

PREHEAT COIL STEAM CONTROL VALVE (V-1)

PREHEAT DISCHARGE AIR TEMPERATURE SENSOR (T-1)

DISCHARGE AIR STATIC PRESSURE SENSOR (SPS-2)

ZONE THERMOSTAT (T-5)

LOCAL DDC CONTROLLER

AI2

AI9

AI8

AI1

AI4

AI5

AI6

AI7

CHILLED WATER CONTROL VALVE (V-2)AI3

COOLING COIL DISCHARGE AIR TEMPERATURE SENSOR (T-3)

REHEAT COIL STEAM CONTROL VALVE (V-3)

LOW LIMIT TEMPERATURE SENSOR (T-2) STATUS

SUPPLY AIR DISCHARGE TEMPERATURE SENSOR (T-4)

65% AIR FILTER STATUS (DPS-2)

DI1

NOT USED

LOW LIMIT TEMPERATURE SENSOR (T-2) STATUS

OUTSIDE AIR DAMPER (D-1) STATUS

DI2 30% AIR FILTER STATUS (DPS-1)

DI3

DI4

DI5

CLG

COIL

STEAM

PREHEAT

COIL

STEAM

REHEAT

COIL

SUPPLY

FAN

T T TH

95% AIR FILTER STATUS (DPS-3)

DI6

99.97% AIR FILTER STATUS (DPS-4)

HIGH LIMIT HUMIDITY SENSOR (H-1) STATUS

SUPPLY FAN STATUS

DI7

DISCHARGE AIR SMOKE DETECTOR (SD-1)DI8

DI9

DI10

DI11

SUPPLY FAN DISCHARGE HIGH LIMIT STATIC PRESSURE SENSOR (SPS-1)

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

9. SHUTDOWN

9.1. WHEN THE UNIT IS SHUTDOWN BY EITHER A STOP COMMAND OR SYSTEM SAFETY, THE UNIT SHALL

BE SET AS FOLLOWS:

SUPPLY FAN SHALL BE OFF

OUTSIDE AIR DAMPER SHALL CLOSE

HUMIDIFIER SHALL BE OFF AND COMMANDED TO 0%

PREHEAT FACE & BYPASS SHALL REMAIN IN CONTROL

PREHEAT VALVE SHALL REMAIN IN CONTROL

COOLING VALVE SHALL CLOSE

REHEAT VALVE SHALL CLOSE

10. CHILLER-1

10.1. UPON NOTIFICATION THAT AHU#7-1 IS ACTIVATED, CHILLER-1 SHALL OPERATE IN SEQUENCE WITH

INTEGRAL PUMPS, ETC., AND CONTROLS TO PROVIDE CHILLED WATER SUPPLY AT 45°F

(ADJUSTABLE) TO 7-HU-1 COOLING COIL.

10.2. CHILLER-1 CONSISTS OF TWO PUMPS. ONE PUMP WILL RUN 100% OF THE TIME. THE 2ND PUMP IS

REDUNDANT FOR BACKUP.

10.3. FREEZE PROTECTION SAFETY

10.3.1. UNIT SHALL OPERATE INTEGRAL PUMP TO CIRCULATE 30% GLYCOL LOOP WATER TO PREVENT

FREEZING WHEN TEMPERATURES DROP BELOW 40°F.

11. EMERGENCY CHILLED WATER CHANGEOVER

11.1. UPON NOTIFICATION OF CHILLED WATER FLOW FAILURE OR CHILLED WATER TEMPERATURE FAILURE, THE FMS SHALL AUTOMATICALLY SWITCH OVER CHILLED WATER SUPPLY FROM DEDICATED

AIR COOLED CHILLER TO CAMPUS CHILLED WATER SYSTEM.

11.2. OWNER'S OPERATION NOTE FOR USE AFTER SUBSTANTIAL COMPLETION

11.2.1. UPON A CHANGEOVER BACK TO DEDICATED CHILLER FROM AN EMERGENCY CHILLED WATER

CHANGEOVER SITUATION, THE OWNER SHOULD RE-ESTABLISH THE 30% GLYCOL

CONCENTRATION, AS THE PLANT CHILLED WATER (WITH NO GLYCOL) LEFT IN THE COOLING COIL

AND PIPING UP TO THE EMERGENCY CHANGEOVER VALVES WILL DIMINISH THE GLYCOL WATER

CONCENTRATION LEFT IN THE DEDICATED CHILLER PIPING SYSTEM.

DO1

AO1

AO2

AO3 REHEAT COIL STEAM CONTROL VALVE (V-3)

PREHEAT COIL STEAM CONTROL VALVE (V-1)

CHILLED WATER CONTROL VALVE (V-2)

OUTSIDE AIR DAMPER (D-1)

DO2 NOT USED

AO4 SUPPLY FAN VFD SPEED

DO3 SUPPLY FAN START/STOP

PHARMACY AHU#7-1 & CHILLER

7-PH_CH-1 CONTROL SCHEMATIC

& SEQUENCE

7 WLP NMT

M7-203

STEAM CONVERTER

TO COND. PUMP

TO

7-AHU-1

HUMIDIFER

NC

PLANT

STEAM

PLANT STEAM

VALVE

AO5

AI10

HUMIDIFIER STEAM CONTROL VALVEAI10

AO5 HUMIDIFIER STEAM CONTROL VALVE

VFD

7-CHP1

7-CHP2

V-2

NO

NO

V-1

V-4

V-3

TO 7-AHU #1

COOLING COIL

SUPPLY

FROM 7-AHU #1

COOLING COIL

RETURN

DO2

DI2

AO1

AI1

DO4

DI3

AO2

AI2

DO1

DI1

AO3

AI3

AI9 T

FT

AI4

AO4

AI5

AO5

AI6

FT

AI7

NO

NO

AO6

AI8

VFD

HOSPITAL

CHWR

HOSPITAL

CHWS

CHILLED WATER PUMP (7-CHP1) VFD STATUS

CHILLED WATER PUMP (7-CHP2) VFD STATUS

HOSPITAL CHWS CONTROL VALVE (V-4)

AI2

AI1

PHARMACY CHWR CONTROL VALVE (V-1)AI3

PHARMACY CHWS FLOWMETERAI4

PHARMACY CHWS CONTROL VALVE (V-2)AI5

AI6 HOSPITAL CHWR CONTROL VALVE (V-3)

AI7 HOSPITAL CHWS FLOWMETER

AI8

PHARMACY CHWR TEMPERATURE SENSORAI9

PHARMACY CHILLER STATUSDI1

CHILLED WATER PUMP (7-CHP1) STATUSDI2

CHILLED WATER PUMP (7-CHP1) VFD SPEEDAO1

CHILLED WATER PUMP (7-CHP2) VFD SPEEDAO2

PHARMACY CHWR CONTROL VALVE (V-1)

PHARMACY CHWS CONTROL VALVE (V-2)AO4

AO3

HOSPITAL CHWR CONTROL VALVE (V-3)AO5

HOSPITAL CHWS CONTROL VALVE (V-4)AO6

PHARMACY CHILLER START/STOP

CHILLED WATER PUMP (7-CHP1) START/STOPDO2

DO1

CHILLED WATER PUMP (7-CHP2) STATUSDI3

CHILLED WATER PUMP (7-CHP2) START/STOPDO3

AO6 PREHEAT FACE & BYPASS DAMPER (D-2) STATUS

PREHEAT FACE & BYPASS DAMPER (D-2) STATUSAI11

RETURN FAN START/STOP

CHILLED WATER CONTROL VALVE (V-1)

OUTSIDE AIR DAMPER (D-1)

DO3

DO2

DO1

RETURN FAN STATUS

AO1

DI4

DI5

MIXED AIR TEMPERATURE (T-2)

LOW LIMIT TEMPERATURE SENSOR (T-3)

FILTER STATUS (DPS-1)

FILTER STATUS (DPS-2)

FILTER STATUS (DPS-3)

AI2

DI2

DI3

DI1

AI1

CHILLED WATER CONTROL VALVE (V-1)AI3

HOT WATER CONTROL VALVE (V-2)AI4

RETURN FAN VFD SPEEDAI5

AI6 SUPPLY FAN VFD SPEED

AI7

SUPPLY FAN STATUS

DI6

HOT WATER CONTROL VALVE (V-2)AO2

AO3 RETURN FAN VFD SPEED

OUTSIDE AIR DAMPER (D-1) STATUS

SUPPLY FAN START/STOP

SUPPLY AIR TEMPERATURE (T-4)

NCOUTSIDE AIR

D-1

DPS-1

T/H-1T/H

C H

W R

PANEL

DDC CONTROL

APU-X

V-1 VFD

BCU-X

T-4

DO3

AO4

DI5

AI6

DO1

AI3

DI1 AI4 AI7

AO1

AO2

T-2

T

AI1

T-3

AI2

RETURN

SUPPLY

AI8

AI9

NOTES:

1. ALL CONTROL DEVICES ARE EXISTING DDC. SENSORS, ACTUATORS, ETC MAY BE

REUSED IF FUNCTIONAL AND COMPATIBLE.

2. CONTROLLER AND ZONE TEMPERATURE/HUMIDITY SENSOR SHALL BE

REPLACED.

3. APU 1&2 ARE INTERLOCKED WITH BCU 1&2 RESPECTIVELY.

4. BCU-1 AND APU-1 SERVE ORAL SURGERY 309A.

5. BCU-2 AND APU-2 SERVE PATIENT PREP 311B & ANTE RM 311A.

DPS-3DPS-2

DI3

RETURN

DI2

H W

R

V-2

NO

DO2

AO3

DI4

AI5

AIR PURIFICATION UNIT

BLOWER COIL AIR UNIT

SEQUENCE OF OPERATION: BLOWER COIL UNIT & AIR PURIFICATION UNIT

1. SUPPLY FAN START/STOP

1.1. THE BLOWER COIL AIR UNIT SHALL BE STARTED AND STOPPED BY THE LOCAL DDC CONTROL PANEL

THROUGH THE HOA SWITCH IN THE STARTER COVER, SHALL BE INTERLOCKED WITH THE AIR

PURIFICATION UNIT (TYPICAL FOR EACH BCU). A CURRENT SENSING RELAY SHALL INDICATE RUN

STATUS AND SET AUTOMATIC TEMPERATURE CONTROLS INTO OPERATION. STOPPING THE UNIT

SUPPLY FAN SHALL DE-ENERGIZE THE CONTROL SYSTEM, AND THE VALVES AND THE TREATED AIR

DAMPER SHALL CLOSE.

2. TEMPERATURE & HUMIDITY CONTROL

2.1. THE ZONE TEMPERATURE/HUMIDITY SENSOR SHALL MODULATE THE CHILLED WATER AND HOT

WATER VALVES IN SEQUENCE, THROUGH THE DDC CONTROLLER, TO MAINTAIN DESIRED ZONE

TEMPERATURE SETPOINT. THE TREATED FRESH AIR DAMPER SHALL OPEN WHEN THE UNIT IS

ENERGIZED. ZONE HUMIDITY SHALL OVERRIDE THE ZONE TEMPERATURE CONTROL AND MODULATE

THE COOLING VALVE TO MAINTAIN 55°F (ADJUSTABLE) SUPPLY AIR TEMPERATURE SETPOINT.

DURING HUMIDITY OVERRIDE MODE, THE DDC CONTROLLER SHALL MODULATE THE HOT WATER

REHEAT VALVE TO MAINTAIN ZONE TEMPERATURE AT SETPOINT.

3. SAFETIES

3.1. UNIT SAFETIES SHALL STOP THE UNIT UPON DETECTION OF A SAFETY FAILURE. UPON THE MIXED AIR TEMPERATURE FALLING BELOW 40°F, AS SENSED BY THE MIXED AIR LOW LIMIT THERMOSTAT, THE

SUPPLY FAN SHALL STOP AND THE VALVES AND DAMPER SHALL CLOSE.

4. AIR FILTER MONITORING

4.1. DIFFERENTIAL PRESSURE SENSORS ACROSS THE BCU FILTER (1 BED) AND ACROSS THE AIR

PURIFICATION SYSTEM (2 BED) SHALL BE REPORTED TO THE VA CAMPUS EMS WORKSTATION,

NOTIFYING THE DDC CONTROL SYSTEM OF A HIGH DIFFERENTIAL PRESSURE ALARM. DIFFERENTIAL PRESSURE SENSOR SHALL BE PROVIDED ACROSS PRE-FILTER AND HEPA FILTER (ALARM AT 2 IN W.G.) WHERE REQUIRED. EACH SHALL BE REPORTED TO THE EMS SYSTEM. AN ANALOG PRESSURE GAUGE, MOUNTED IN A CABINET WITH A COVER AND INDICATOR LAMP, LOCATED ON THE ANTE ROOM

WALL SHALL DISPLAY THE NUMERICAL VALUE OF DIFFERENTIAL PRESSURES AND FLASH A RED

STATUS LIGHT WHEN THE FILTER PRESSURE RISES OR FALLS BELOW SETPOINTS FOR THE HEPA

AND PRE-FILTER BANKS.

T T

VFD

CLG

COIL

HTG

COIL

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

99.97%

FILTER

30%

FILTER

PHARMACY BLOWER COIL UNIT

& HOT WATER REHEAT COIL CONTROL

SCHEMATICS & SEQUENCES

7 WLP NMT

M7-204

ZONE

THERMOSTAT/HUMIDITY

AIR SENSORPANEL

DDC CONTROL

AI1

AO1

H W

R

V-1

NC

T/H-1

AI3

T/H

ZONE THERMOSTAT/

HUMIDITY SENSOR

HTG

COIL

HOT WATER CONTROL VALVE (V-1)AI1

HOT WATER CONTROL VALVE (V-1)AO1

ZONE TEMPERATURE SENSOR (T/H-1)AI2

ZONE HUMIDITY SENSOR (T/H-1)AI3

AI2

SEQUENCE OF OPERATION: PHARMACY HOT WATER REHEAT COIL

1. REHEAT VALVE CONTROL

1.1. REHEAT VALVE SHALL MODULATE TO MAINTAIN SPACE TEMPERATURE SETPOINT.

DI6

AI8 ZONE HUMIDITY SENSOR (T/H-1)

AI9 ZONE THERMOSTAT (T/H-1)

AO4 SUPPLY FAN VFD SPEED

RETURN AIR DAMPER (D-2)

SUPPLY FAN VFD SPEED

OUTSIDE AIR DAMPER (D-1)

DO3

DO2

DO1

AIR FILTER STATUS (DPS-1)

AO1

DI4

DI5

RETURN AIR TEMPERATURE SENSOR (T/H-1)

RETURN AIR HUMIDITY SENSOR (T/H-1)

OUTSIDE AIR DAMPER (D-1) STATUS

RETURN AIR DAMPER (D-2) STATUS

RETURN AIR SMOKE DETECTOR (SD-1) STATUS

AI2

DI2

DI3

DI1

AI1

MIXED AIR TEMPERATURE SENSOR (T-1)AI3

RETURN AIR CARBON DIOXIDE SENSOR (CO2-1)AI4

HOT WATER CONTROL VALVE (V-1)AI5

AI6 CHILLED WATER CONTROL VALVE (V-2)

AI7

LOW LIMIT TEMPERATURE SENSOR (T-2)

DI6

CHILLED WATER CONTROL VALVE (V-2)AO2

AO3

HOT WATER CONTROL VALVE (V-1)

SUPPLY FAN STATUS

SUPPLY FAN START/STOP

SUPPLY FAN VFD STATUS

NOTES:

1. ALL CONTROL DEVICES ARE EXISTING

DDC. SENSORS, ACTUATORS, ETC MA

BE REUSED IF FUNCTIONAL AND

COMPATIBLE.

2. CONTROLLER TO BE REPLACED.

CONNECT NEW CONTROLLER TO

EXISTING ELECTRICAL SERVICE.

SPS-2

AI9

SUPPLY

VFD

FAN

DO3

AO3

DI6

AI7

COIL

H W

R

V-1

NO

HTG

AI5

AO1

DI5DI2

D02DO1

DI1 AI4

SUPPLY

PANEL

DDC CONTROL

T

AI3

T-1

T/H-1

OUTSIDE AIR

D-1

AI1

D-2

CO2-1

T-2

C W

R

COIL

CLG

V-2

AI6

AO2

AI8

T-3

SPS-1

DI8

DPS-1

DI4

SD-1

DI9

SD-2

DI3

AI2

NC

C

NO

NC

C MOUNTED IN

VAV AHU-1

PANEL.

DPS-2

DI7

NOTES:

1. ALL CONTROL DEVICES ARE EXISTING

DDC. SENSORS, ACTUATORS, ETC MAY

BE REUSED IF FUNCTIONAL AND

COMPATIBLE.

2. CONTROLLER AND SPACE

TEMPERATURE/HUMIDITY SENSOR SHALL

BE REPLACED.

3. CONNECT NEW CONTROLLER TO

EXISTING ELECTRICAL SERVICE.

COIL

H W

R

V-1

NC

HTG

AI2

AO1

PANEL

DDC CONTROL

T

AI3

T-1

M

AI1

AO2

T/H-1

AI4

ZONE THERMOSTAT/

HUMIDITY AIR SENSOR

AI5

NO

C

SEQUENCE OF OPERATION: MRI/CT AHU7-1

1. START/STOP

1.1. DURING THE OCCUPIED MODE, MRI/CT AHU7-1 SHALL BE STARTED AND STOPPED BY TIME SCHEDULE

OR MANUAL COMMANDS FROM THE FMS VIA RELAY. DURING THE UNOCCUPIED MODE, THE

ASSOCIATED VAV BOX TEMPORARY OCCUPANCY BUTTON SHALL BE MONITORED BY THE DDC

CONTROLS AND SHALL START THE FAN FOR THE TEMPORARY OCCUPANCY TIME (ADJUSTABLE).

WHEN THE MRI/CT AHU7-1 FAN STATUS IS PROVEN VIA THE RESPECTIVE RELAY, THE TEMPERATURE

CONTROLS SHALL BE ENABLED. WHEN THE SUPPLY FAN IS OFF, THE TEMPERATURE CONTROLS

SHALL BE DE-ENERGIZED AND THE OUTSIDE AIR DAMPER SHALL CLOSE AND THE VALVES SHALL

SHUT.

2. TEMPERATURE CONTROL

2.1. WHEN FAN STATUS IS PROVEN VIA THE RESPECTIVE RELAY, THE TEMPERATURE CONTROLS SHALL BE ENABLED. THE HEATING AND COOLING VALVES SHALL MODULATE TO MAINTAIN THE SUPPLY AIR

TEMPERATURE AT 55°F (ADJUSTABLE).

3. DEHUMIDIFICATION

3.1. A HUMIDITY SENSOR LOCATED IN THE RETURN AIR DUCT SHALL SENSE HUMIDITY FROM THE SERVED SPACE. IF THE RETURN AIR HUMIDITY RISES ABOVE 55% RH (ADJUSTABLE), THE SUPPLY AIR TEMPERATURE SETPOINT SHALL BE LOWERED TO KEEP THE RETURN AIR HUMIDITY BELOW 55% RH.

THE HEATING VALVE SHALL THEN BE MODULATED TO MAINTAIN 55°F (ADJUSTABLE) SUPPLY AIR

TEMPERATURE.

4. SUPPLY PRESSURE CONTROL

4.1. THE SUPPLY FAN VFD SPEED SHALL BE MODULATED TO MAINTAIN STATIC PRESSURE SETPOINT

(ADJUSTABLE).

5. OUTSIDE AIR DAMPER

5.1. WHEN FAN STATUS IS PROVEN TRUE VIA THE RESPECTIVE RELAY, THE OUTSIDE AIR DAMPER SHALL

OPEN TO MIN. POSITION (ADJUSTABLE), BUT SHALL MODULATE TOWARD SHUT IF MIXED AIR

TEMPERATURE DROPS BELOW 50°F FOR ADDITIONAL FREEZE PROTECTION. THE RETURN AIR C02 CONCENTRATIONS SHALL BE MONITORED TO MAINTAIN MIN. VENTILATION AIR REQUIREMENTS. CO2

PPM SETPOINT TO BE DEFINED BY VA.

6. ALARMS

6.1. IF THE MIXED AIR TEMPERATURE LOW LIMIT SAFETY SENSES LESS THAN 40°F, THE UNIT SHALL SHUT

DOWN UNTIL MANUALLY RESET, THE VALVES SHALL OPEN, AND THE DAMPERS SHALL SHUT.

6.2. IF PRODUCTS OF COMBUSTION ARE SENSED BY DUCT SMOKE DETECTORS (BY OTHERS), THE UNIT

SHALL STOP.

6.3. IF THE SUPPLY AIR STATIC PRESSURE HIGH LIMIT SENSOR DETECTS PRESSURE ABOVE SETPOINT, THE UNIT SHALL SHUT DOWN UNTIL MANUALLY RESET.

7. MORNING WARM UP MODE

7.1. WHEN THE SYSTEM IS COMMANDED TO THE MORNING WARM UP MODE, THE HEATING VALVE SHALL

BE COMMANDED OPEN AND ALLOW PRIMARY AIR TO HEAT THE SPACE SERVED.

7.1.1. WHEN OUTSIDE AIR DEW POINT TEMPERATURE IS ABOVE 55°F, THE DISCHARGE AIR

TEMPERATURE SETPOINT SHOULD NOT EXCEED 57°F.

SEQUENCE OF OPERATION: VAV BOX

1. START/STOP CONTROL

1.1. THE VAV BOXES SHALL FOLLOW THE OCCUPIED MODE OF THE ASSOCIATED AHU.

2. TEMPERATURE CONTROL

2.1. A SPACE SENSOR SHALL TRANSMIT ROOM TEMPERATURE AND HUMIDITY TO THE BOX CONTROLLER, WHICH SHALL VARY THE PRIMARY AIRFLOW AND VARY THE HEATING VALVE TO MAINTAIN SPACE

TEMPERATURE SETPOINTS. A RISE IN SPACE TEMPERATURE ABOVE SETPOINT SHALL MODULATE

PRIMARY AIRFLOW TO MAINTAIN MAX. CFM SETPOINT. A DROP IN SPACE TEMPERATURE BELOW

SETPOINT SHALL MODULATE THE PRIMARY AIRFLOW TO MAINTAIN MIN. CFM SETPOINT. A FURTHER

DROP IN SPACE TEMPERATURE SHALL MODULATE THE BOX REHEAT CONTROL VALVE OPEN.

3. UNOCCUPIED MODE

3.1. WHEN THE SYSTEM IS IN THE UNOCCUPIED MODE, THE ASSOCIATED AHU SHALL STOP, THE VAV BOX SHALL CLOSE AND REHEAT VALVE SHALL CLOSE. IF THE SPACE TEMPERATURE FALLS BELOW THE NIGHT SETBACK TEMPERATURE SETPOINT, THE ASSOCIATED AHU SHALL START, THE VAV BOX DAMPER SHALL OPEN, AND THE HEATING VALVE SHALL OPEN TO ALLOW THE AHU TO HEAT THE SPACE TO THE UNOCCUPIED HEATING SETPOINT. IF THE SPACE TEMPERATURE RISES ABOVE THE NIGHT CYCLE SETPOINT, THE AHU SHALL START, AND THE BOX CONTROLLER SHALL VERY THE PRIMARY AIRFLOW TO

COOL THE SPACE TO UNOCCUPIED COOLING SETPOINT.

4. TEMPERATURE OCCUPANCY MODE

4.1. WHEN THE ASSOCIATED VAV BOX TEMPORARY OCCUPANCY BUTTON IS PRESSED, THE VAV BOX SHALL

BE PUT INTO THE OCCUPIED MODE FOR THE RESPECTIVE TIME PERIOD (ADJUSTABLE).

5. MORNING WARM UP MODE

5.1. WHEN THE ASSOCIATED AHU IS IN THE MORNING WARM UP MODE, THE SYSTEM SHALL SET THE SPACE SENSOR TO ITS OCCUPIED HEATING TEMPERATURE. THE BOX CONTROLLER SHALL INDEX THE PRIMARY AIRFLOW TO 100%, AND THE HEATING VALVE SHALL OPEN. THE DAMPER AND HEATING VALVE SHALL CLOSE WHEN THE SPACE IS SATISFIED AND THE AHU IS STILL IN WARM UP MODE. WHEN THE AHU RETURNS TO OCCUPIED MODE, THE ASSOCIATED VAV BOXES SHALL RETURN TO OCCUPIED MODE.

6. HUMIDITY MONITORING

6.1. THE SPACE HUMIDITY SHALL BE MONITORED BY EACH VAV BOX CONTROLLER. AS ZONE HUMIDITY RISES ABOVE SETPOINT, THE AHU SUPPLY AIR TEMPERATURE SHALL BE RESET TO A LOWER TEMPERATURE AS NEED FOR DEHUMIDIFICATION. THE VAV BOX SHALL FUNCTION TO MAINTAIN ZONE TEMPERATURE

SETPOINT. UPON DECREASE IN HUMIDITY, THE REVERSE SHALL OCCUR.

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

RETURN AIR

FILTER

AIR

T T

SUPPLY AIR TEMPERATURE SENSOR (T-3)

SUPPLY AIR STATIC PRESSURE SENSOR (SPS-2)AI9

AI8

HIGH LIMIT STATIC PRESSURE SENSOR (SPS-1) STATUSDI8

DI9

AIR FILTER STATUS (DPS-2)DI7

SUPPLY SMOKE DETECTOR (SD-2) STATUS

AO1

INTAKE AIR DAMPER STATUS

HOT WATER CONTROL VALVE (V-1)AI2

AI1

DISCHARGE AIR TEMPERATURE SENSOR (T-1)AI3

ZONE TEMPERATURE SENSOR (T/H-1)AI4

ZONE HUMIDITY SENSOR (T/H-1)AI5

HOT WATER CONTROL VALVE (V-1)AO2

INTAKE DAMPER CONTROLLER

T/H

MRI/CT AHU7-1 & VAV BOX CONTROLS

SCHEMATICS & SEQUENCES

7 WLP NMT

M7-205

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

AHU7-SF1 & 7-A/C-1 CONTROL

SCHEMATIC & SEQUENCE

7 WLP NMT

M7-206

SUPPLY FAN START/STOPDO1

AO1

PREHEAT COIL HOT WATER CONTROL VALVE (V-1)

COOLING COIL CHILLED WATER CONTROL VALVE (V-2)

INTAKE AIR FILTER STATUS (DPS-1)

SUPPLY FAN STATUS

HIGH LIMIT TEMPERATURE SENSOR (T-2) STATUS

AI2

DI2

DI3

DI1

AI1

AIRFLOW METER (F-1)AI3

DISCHARGE AIR TEMPERATURE SENSOR (T-1)AI4

AO2

STR

DO1

DI2

H W

R

V-1

NO

AI1

AO1

DI3

SUPPLY

PANEL

DDC CONTROL

OUTSIDE AIR

T-2

C W

R

V-2

AI2

AO2

AI4

T-1

DPS-1

DI1

NC

C

NO

NC

C

TT

FILTER

AIR SUPPLY

FAN

CLG

COIL

HTG

COIL

SEQUENCE OF OPERATION: 7-A/C-1

1. GENERAL

1.1. AIR UNIT FAN TO BE STARTED AND STOPPED AS SCHEDULED BY THE ECC.

2. TEMPERATURE CONTROL

2.1. WHEN THE OUTSIDE AIR TEMPERATURE IS ABOVE 50°F (ADJUSTABLE), CHILLED WATER VALVE, V-2, SHALL BE MODULATED TO MAINTAIN SUPPLY AIR TEMPERATURE OF 55°F (ADJUSTABLE) AS

TRANSMITTED BY T-1.

2.2. WHEN THE OUTSIDE AIR TEMPERATURE IS BELOW 50°F, PREHEAT COIL VALVE, V-1, SHALL BE MODULATED TO MAINTAIN SUPPLY AIR TEMPERATURE AT 70°F (ADJUSTABLE). THE SUPPLY AIR TEMPERATURE SHALL BE LIMITED TO 100°F (ADJUSTABLE). SUPPLY AIR TEMPERATURE IS TRANSMITTED

BY T-1.

3. ALARMS

3.1. THE UNIT AIR FAN SHALL BE DE-ENERGIZED ON A RISE IN DISCHARGE AIR TEMPERATURE ABOVE THE

125°F SETPOINT OF T-2.

3.2. THE FILTER STATUS IS SENSED AT DPS-1. SHOULD THE DROP ACROSS THE FILTER EXCEED 1.5", THE

SWITCH SHALL CLOSE AND INITIATE AN ALARM TO THE ECC.

3.3. WHEN THE AIR UNIT FAN IS DE-ENERGIZED FOR ANY REASON, THE AIR UNIT CONTROL VALVES SHALL

RETURN TO THEIR NORMAL POSITIONS.

4. UNOCCUPIED MODE

4.1. DURING UNSCHEDULED PERIODS, THE AIR UNIT FAN SHALL BE DE-ENERGIZED AND ALL CONTROLS AND CONTROL VALVES SHALL RETURN TO THEIR NORMAL POSITIONS AND THE OUTSIDE AIR DAMPER SHALL

BE CLOSED.

NOTES:

1. ALL CONTROL DEVICES ARE EXISTING PNEUMATIC

AND ARE TO BE REPLACED WITH APPROPIATE DDC

DEVICES.

F-1

AI3

PREHEAT COIL HOT WATER CONTROL VALVE (V-1)

COOLING COIL CHILLED WATER CONTROL VALVE (V-2)

SEQUENCE OF OPERATION: AHU7-SF1

1. START/STOP

1.1. DURING THE OCCUPIED MODE, AHU7-SF1 SHALL BE STARTED AND STOPPED BY TIME SCHEDULE OR MANUAL COMMANDS FROM THE FMS VIA RELAY. DURING THE UNOCCUPIED MODE, THE ASSOCIATED

VAV BOX TEMPORARY OCCUPANCY BUTTON SHALL BE MONITORED BY THE DDC CONTROLS AND

SHALL START THE FAN FOR THE TEMPORARY OCCUPANCY TIME (ADJUSTABLE). WHEN THE AHU7-SF1

FAN STATUS IS PROVEN VIA THE RESPECTIVE RELAY, THE TEMPERATURE CONTROLS SHALL BE

ENABLED. WHEN THE SUPPLY FAN IS OFF, THE TEMPERATURE CONTROLS SHALL BE DE-ENERGIZED

AND THE OUTSIDE AIR DAMPER SHALL CLOSE AND THE VALVES SHALL SHUT.

2. TEMPERATURE CONTROL

2.1. WHEN FAN STATUS IS PROVEN VIA THE RESPECTIVE RELAY, THE TEMPERATURE CONTROLS SHALL BE ENABLED. THE HEATING AND COOLING VALVES SHALL MODULATE TO MAINTAIN THE SUPPLY AIR

TEMPERATURE AT 55°F (ADJUSTABLE).

3. DEHUMIDIFICATION

3.1. A HUMIDITY SENSOR LOCATED IN THE RETURN AIR DUCT SHALL SENSE HUMIDITY FROM THE SERVED SPACE. IF THE RETURN AIR HUMIDITY RISES ABOVE 55% RH (ADJUSTABLE), THE SUPPLY AIR TEMPERATURE SETPOINT SHALL BE LOWERED TO KEEP THE RETURN AIR HUMIDITY BELOW 55% RH.

THE HEATING VALVE SHALL THEN BE MODULATED TO MAINTAIN 55°F (ADJUSTABLE) SUPPLY AIR

TEMPERATURE.

4. SUPPLY PRESSURE CONTROL

4.1. THE SUPPLY FAN VFD SPEED SHALL BE MODULATED TO MAINTAIN STATIC PRESSURE SETPOINT

(ADJUSTABLE).

5. OUTSIDE AIR DAMPER

5.1. WHEN FAN STATUS IS PROVEN TRUE VIA THE RESPECTIVE RELAY, THE OUTSIDE AIR DAMPER SHALL

OPEN TO MIN. POSITION (ADJUSTABLE), BUT SHALL MODULATE TOWARD SHUT IF MIXED AIR

TEMPERATURE DROPS BELOW 50°F FOR ADDITIONAL FREEZE PROTECTION. THE RETURN AIR C02 CONCENTRATIONS SHALL BE MONITORED TO MAINTAIN MIN. VENTILATION AIR REQUIREMENTS. CO2

PPM SETPOINT TO BE DEFINED BY VA.

6. ALARMS

6.1. IF THE MIXED AIR TEMPERATURE LOW LIMIT SAFETY SENSES LESS THAN 40°F, THE UNIT SHALL SHUT

DOWN UNTIL MANUALLY RESET, THE VALVES SHALL OPEN, AND THE DAMPERS SHALL SHUT.

6.2. IF PRODUCTS OF COMBUSTION ARE SENSED BY DUCT SMOKE DETECTORS (BY OTHERS), THE UNIT

SHALL STOP.

6.3. IF THE SUPPLY AIR STATIC PRESSURE HIGH LIMIT SENSOR DETECTS PRESSURE ABOVE SETPOINT, THE UNIT SHALL SHUT DOWN UNTIL MANUALLY RESET.

7. MORNING WARM UP MODE

7.1. WHEN THE SYSTEM IS COMMANDED TO THE MORNING WARM UP MODE, THE HEATING VALVE SHALL

BE COMMANDED OPEN AND ALLOW PRIMARY AIR TO HEAT THE SPACE SERVED.

7.1.1. WHEN OUTSIDE AIR DEW POINT TEMPERATURE IS ABOVE 55°F, THE DISCHARGE AIR

TEMPERATURE SETPOINT SHOULD NOT EXCEED 57°F.

RETURN AIR DAMPER (D-2)

SUPPLY FAN VFD SPEED

OUTSIDE AIR DAMPER (D-1)

DO3

DO2

DO1

AIR FILTER STATUS (DPS-1)

AO1

DI4

DI5

RETURN AIR TEMPERATURE SENSOR (T/H-1)

RETURN AIR HUMIDITY SENSOR (T/H-1)

OUTSIDE AIR DAMPER (D-1) STATUS

RETURN AIR DAMPER (D-2) STATUS

RETURN AIR SMOKE DETECTOR (SD-1) STATUS

AI2

DI2

DI3

DI1

AI1

MIXED AIR TEMPERATURE SENSOR (T-1)AI3

RETURN AIR CARBON DIOXIDE SENSOR (CO2-1)AI4

HOT WATER CONTROL VALVE (V-1)AI5

AI6 CHILLED WATER CONTROL VALVE (V-2)

AI7

LOW LIMIT TEMPERATURE SENSOR (T-2)

DI6

CHILLED WATER CONTROL VALVE (V-2)AO2

AO3

HOT WATER CONTROL VALVE (V-1)

SUPPLY FAN STATUS

SUPPLY FAN START/STOP

SUPPLY FAN VFD STATUS

NOTES:

1. ALL CONTROL DEVICES ARE EXISTING

DDC. SENSORS, ACTUATORS, ETC MA

BE REUSED IF FUNCTIONAL AND

COMPATIBLE.

2. CONTROLLER TO BE REPLACED.

CONNECT NEW CONTROLLER TO

EXISTING ELECTRICAL SERVICE.

SPS-2

AI9

SUPPLY

VFD

FAN

DO3

AO3

DI6

AI7

COIL

H W

R

V-1

NO

HTG

AI5

AO1

DI5DI2

D02DO1

DI1 AI4

SUPPLY

PANEL

DDC CONTROL

T

AI3

T-1

T/H-1

OUTSIDE AIR

D-1

AI1

D-2

CO2-1

T-2

C W

R

COIL

CLG

V-2

AI6

AO2

AI8

T-3

SPS-1

DI8

DPS-1

DI4

SD-1

DI9

SD-2

DI3

AI2

NC

C

NO

NC

C DPS-2

DI7

RETURN AIR

FILTER

AIR

T T

SUPPLY AIR TEMPERATURE SENSOR (T-3)

SUPPLY AIR STATIC PRESSURE SENSOR (SPS-2)AI9

AI8

HIGH LIMIT STATIC PRESSURE SENSOR (SPS-1) STATUSDI8

DI9

AIR FILTER STATUS (DPS-2)DI7

SUPPLY SMOKE DETECTOR (SD-2) STATUS

1. ALL CONTROL DEVICES ARE EXISTING

DDC AND ARE TO BE REUSED IF

FUNCTIONAL AND COMPATIBLE WITH

THE EXCEPTION OF THE CONTROLLER.

CONTROLLER SHALL BE REPLACED.

CONNECT TO EXISTING ELECTRICAL

SERVICE.

2. DP-1,2,4,&5 MODULATE PRESSURE BY

MOVING DAMPERS.

D-1

NO

F-1

D-2 D-3 D-4 D-5 D-6

HWR

V-1

NO

NCC

RHC-2 7RHC-3

CHEMO HOOD

T/H-2 T/H

TO

7-EF-2

FROM

7-AHU #1

TO

7-EF-1

TO

7-EF-3

FROM

7-AHU #1

FROM

7-AHU #1

FROM 7-AHU

#1

T/H-5

MONITOR

ONLY

SERVES

RHC-2

ZONE TEMPERATURE/HUMIDITY

POINTS TERMINATE TO

EXHAUST FAN / REHEAT COIL

DDC CONTROLLERS.

P

DP-1

T/H-3

SERVES

RHC-3

DP-2

DP-3

DP-4

DP-5

NO NO NO NO NO

DP-6

T/H-4

SERVES

RHC-4

T/H-1

SERVES

RHC-1

CHEMO CLEAN ROOM

RM 312C

STERILE AIRLOCK

RM 312D

ANTE ROOM

RM 312A

STERILE CLEAN ROOM

IV-PREP

RM 312B

CORRIDOR

RM 300X

DRUG STOCK ROOM

RM 308

HAZARDOUS DRUG

STORAGE

RM 310

STERILE H.K.

RM 309

MONITOR

ONLY

1. GENERAL

1.1. WHENEVER PHARMACY 7-AHU-1 IS ENERGIZED, THE PRESSURE CONTROLS SERVING THE CSP AREA ARE ENABLED TO

OPERATE.

2. CHEMO CLEAN ROOM 312C / STERILE AIRLOCK 312D PRESSURE CONTROLS

2.1. A ROOM PRESSURE MONITOR AND CONTROL STATION LOCATED IN STERILE AIRLOCK MONITORS THE DIFFERENCE IN PRESSURE BETWEEN THE STERILE AIRLOCK AND THE CHEMO CLEAN ROOM AND MODULATES TWO 7-EF-1 SYSTEM EXHAUST AIR DAMPERS TO MAINTAIN CHEMO CLEAN ROOM AT A PRESSURE OF +0.05 IN. W.C. RELATIVE TO THE STERILE AIRLOCK.

2.2. THE ROOM PRESSURE MONITOR SERVING THE STERILE AIRLOCK / CHEMO CLEAN ROOM PRESSURE RELATIONSHIP ALSO MONITORS THE RATE OF AIRFLOW IN THE CONSTANT VOLUME CHEMO EXHAUST HOOD SYSTEM. WHENEVER THE RATE OF EXHAUST AIRFLOW VARIES BY 5% OR MORE, AN AUDIBLE/VISUAL ALARM IS ACTIVATED IN THE ANTE ROOM (312A) AND AN

ALARM CONDITION IS SENT TO THE EMS WORKSTATION AND PRINTER.

3. ANTE ROOM 312A / STERILE AIRLOCK 312D PRESSURE CONTROLS

3.1. A ROOM PRESSURE MONITOR AND CONTROL STATION LOCATED IN ANTE ROOM MONITORS THE DIFFERENCE IN PRESSURE BETWEEN THE STERILE AIRLOCK AND THE ANTE ROOM AND MODULATES ONE 7-EF-1 SYSTEM EXHAUST AIR DAMPER TO MAINTAIN STERILE AIRLOCK AT A PRESSURE OF -0.05 IN. W.C. RELATIVE TO THE ANTE ROOM.

4. ANTE ROOM 312A / STERILE CLEAN ROOM I-V PREP PRESSURE CONTROLS

4.1. A ROOM PRESSURE MONITOR AND CONTROL STATION LOCATED IN ANTE ROOM MONITORS THE DIFFERENCE IN PRESSURE BETWEEN THE STERILE CLEAN ROOM I-V PREP AREA AND THE ANTE ROOM AND MODULATES TWO 7-EF-1 SYSTEM EXHAUST AIR DAMPERS TO MAINTAIN STERILE CLEAN ROOM I-V PREP AREA AT A PRESSURE OF -0.05 IN. W.C. RELATIVE TO THE ANTE ROOM.

5. ANTE ROOM 312A / DRUG STOCK ROOM 308 PRESSURE CONTROLS

5.1. A ROOM PRESSURE MONITOR AND CONTROL STATION LOCATED IN ANTE ROOM MONITORS THE DIFFERENCE IN PRESSURE BETWEEN THE DRUG STOCK ROOM AND THE ANTE ROOM AND MODULATES ONE 7-EF-1 SYSTEM EXHAUST AIR DAMPER TO MAINTAIN DRUG STOCK ROOM AT A PRESSURE OF +0.05 IN. W.C. RELATIVE TO THE ANTE ROOM.

5.2. A SEPERATE "MONITOR ONLY" ROOM PRESSURE MONITOR STATION LOCATED IN THE ANTE ROOM WILL ALSO MONITOR (ONLY) THE PRESSURE OF THE CORRIDOR 300X AT A PRESSURE OF +0.01 IN. W.C. RELATIVE TO THE ANTE ROOM. THE MONITOR WILL ALSO ALARM UPON IMPROPERLY MAINTAINED ROOM PRESSURE AS PER "ROOM PRESSURE MONITOR STATUS INDICATION". THE DOOR SEPARATING ANTE ROOM AND CORRIDOR 300X WILL NORMALLY BE LOCKED AND CLOSED, NOT INTENDED FOR

PERSONAL USE.

6. HAZARDOUS DRUG STORAGE 310 / DRUG RESTOCK ROOM 308 & STERILE HOUSEKEEPING 309 PRESSURE CONTROLS

6.1. A ROOM PRESSURE MONITOR AND CONTROL STATION LOCATED IN DRUG STOCK ROOM MONITORS THE DIFFERENCE IN PRESSURE BETWEEN THE DRUG STOCK ROOM AND THE HAZARDOUS DRUG STORAGE ROOM AND THE DRUG STOCK ROOM AND THE STERILE HOUSEKEEPING ROOM TO ENSURE THAT THE HAZARDOUS DRUG STORAGE ROOM AND THE DRUG STORAGE ROOM AND THE STERILE HOUSEKEEPING ROOM TO ENSURE THAT THE HAZARDOUS DRUG STORAGE ROOM PRESSURE AND THE STERILE HOUSEKEEPING ROOM ARE MAINTAINED AT

PRESSURE OF +0.05 IN. W.C. RELATIVE TO THE DRUG STOCK ROOM.

6.2. DIFFERENTIAL PRESSURE SENSORS ACROSS EF-3 PRE-FILTER AND HEPA FILTER SHALL GENERATE AN ALARM AT THE EMS SYSTEM WORKSTATION. AN ANALOG PRESSURE GAUGE, MOUNTED IN A CABINET WITH A COVER AND INDICTOR LAMP, LOCATED ON THE ANTE ROOM WALL SHALL DISPLAY THE NUMERICAL VALUE OF DIFFERENTIAL PRESSURES AND FLASH A RED STATUS LIGHT WHEN THE FILTER PRESSURE RISES OR FALLS BELOW SETPOINTS

FOR THE HEPA AND PRE-FILTER BANKS.

7. ROOM PRESSURE MONITOR STATUS INDICATION

7.1. WHENEVER A ROOM PRESSURE RELATIONSHIP IS PROPERLY MAINTAINED, THE GREEN "SAFE" LIGHT ON THE FACE OF THE PRESSURE STATION SHALL ILLUMINATE. IF ANY ROOM PRESSURE CONDITIONS CANNOT BE SATISFIED, THE GREEN LIGHT TURNS OFF AND THE RED "ALARM" LIGHT AND AUDIBLE ALARM SOUNDER TURNS ON. THE DIGITAL DISPLAY ON THE FACE OF THE PRESSURE STATION INDICATES ACTUAL ROOM PRESSURE (POSITIVE, NEGATIVE, OR NO ISOLATION), ALARM STATUS, MENU OPTIONS, AND ERROR MESSAGES. IN NORMAL OPERATION, THE GREEN LIGHT IS ON, THE DISPLAY CONTINUOUSLY SCROLLS INFORMATION ABOUT ROOM PRESSURE AND OTHER VARIABLES PROGRAMMED (FLOW, AIR CHANGES PER HOUR, ETC.).