ATTACHMENT_K_Design Revision 01.pdf

PWD Norfolk, Facilities Engineering and Acquisition Division Page 1 of 1

Design Revision 01 eProjects Work Order Number: 1487319

Construction Contract Number:

Building: SP-366

Project Title: REPLACE HVAC SYSTEM

Date: February 24, 2021

Design Revision Purpose

1. Response to PPI.

Drawing Revisions

SECTION 00 01 15 LIST OF DRAWINGS

1.2 CONTRACT DRAWINGS

The following drawings are revised as of February 24, 2021 and accompany this Design Revision:

NAVFAC Dwg. No. Title

Mechanical 12,819,614 (M-703) Controls

Electrical 12,819,626 (E-401) Partial First Floor Power Plan – Mechanical & Flight

On NAVFAC Drawing No. 12,819,583 (HM101) PARTIAL 1ST FLOOR CEILING PLAN – MECH RM 108 – GWB CEILING – HAZMAT ABATEMENT WORK: Revise the following note: “EXISTING STRUCTURAL BEAM WITH GWB SHEATHING TO REMAIN, NIC.” Revised note to read: “EXISTING STRUCTURAL BEAM WITH GWB SHEATHING. BEAM TO REMAIN. REMOVE GWB

SHEATHING AND BLOCKING COMPLETE PER DETAIL A1 ON SHEET AD402. ASSUME PRESENCE OF

ASBESTOS CONTAMINATED GWB SHEATHING AND JOINT COMPOUND.”

OUTSIDE

AIR

NC

NO

FILTER

HEATING

COIL

RETURN

AIR

COOLING

COIL

SA FAN SUPPLY

AIR

H L

NORTH WALL

FLOW

STN

AI2

T

AO4

MD

MDAO5

T

AI6

AFS

AI5

T

AI4

VFD

BI2

AO1 BO1

T

AI3

PS BI1 SP

AI1

TO FACP

SD

AO3 AO2

FILTER

DPS

BI4

DPS

BI3

M

CHWR

CHWS

HWR

HWS

T

BI8

M

OCCUPIED MODE:

AHU-1 SHALL BE STARTED THRU THE DDC. UPON A SIGNAL TO START THE AHU FROM THE DDC SYSTEM, THE SUPPLY FAN SHALL ENERGIZE AND THE OUTSIDE AIR DAMPER SHALL OPEN TO ITS MINIMUM POSITION.

PROVIDE AN AIRFLOW MEASURING STATION IN THE OUTSIDE AIR DUCT. UPON A FALL OR RISE IN OUTSIDE AIR CFM BELOW OR ABOVE SETPOINT, THE OUTSIDE AIR DAMPER SHALL MODULATE TO MAINTAIN SETPOINT. THE SUPPLY FAN VFD SHALL MODULATE TO MAINTAIN THE DOWNSTREAM DUCT PRESSURE SETPOINT. THE DUCT STATIC PRESSURE SETPOINT SHALL BE SENT BY THE DDC AND SHALL BE RESET BETWEEN THE MINIMUM AND MAXIMUM STATIC PRESSURE LIMITS TO MAINTAIN THE CRITICAL ZONE VAV AIR DAMPER IN A POSITION BETWEEN 65% AND 75% OPEN. THE DDC SHALL RESET THE DUCT STATIC PRESSURE SETPOINT BASED ON THE POSITION OF THE FURTHEST OPEN VAV DAMPER. WHEN THE UNIT IS IN THE UNOCCUPIED MODE THE CONTROLLER SHALL MODULATE THE SPEED OF THE VFD TO 50%. IF THE DUCT STATIC PRESSURE SENSOR FAILS, THE VFD SHALL MODULATE ITS SPEED TO 50% AND AN ALARM SHALL BE ANNUNCIATED AT THE BAS.

PROVIDE ALARMS FOR FAN FAILURE (COMMANDED ON BUT THE STATUS IS OFF), FAN RUNNING IN HAND (COMMANDED OFF BUT THE STATUS IS ON), AND FILTER DIFFERENTIAL STATIC PRESSURES. IF DISCHARGE STATIC PRESSURE RISES ABOVE 3.00 INCHES WC (ADJ), DE-ENERGIZE THE SUPPLY FAN AND SEND AN ALARM.

ON A RISE IN DISCHARGE AIR TEMPERATURE ABOVE THE COOLING SETPOINT (55°F, ADJ), THE CHILLED WATER VALVE SHALL MODULATE TO MAINTAIN SETPOINT. ON A FALL IN DISCHARGE AIR TEMPERATURE BELOW THE COOLING SETPOINT, THE CHILLED WATER VALVE SHALL CLOSE. ON A FURTHER FALL IN DISCHARGE AIR TEMPERATURE BELOW THE HEATING SETPOINT (52°F, ADJ.), THE HEATING WATER VALVE SHALL OPEN AND MODULATE TO MAINTAIN SETPOINT. ON A RISE IN DISCHARGE AIR TEMPERATURE ABOVE THE HEATING

SETPOINT, THE HEATING WATER VALVE SHALL CLOSE.

ON A RISE IN DISCHARGE AIR TEMPERATURE ABOVE SETPOINT FOR GREATER THAN 5 MINUTES, AN ALARM SHALL BE SIGNALED TO THE DDC SYSTEM. ON A FALL IN DISCHARGE AIR TEMPERATURE BELOW SETPOINT

FOR GREATER THAN 5 MINUTES, AN ALARM SHALL BE SIGNALED TO THE DDC SYSTEM.

PROVIDE A FREEZESTAT IMMEDIATELY UPSTREAM OF THE COOLING COIL. OPERATION SHALL BE SUCH THAT ON A FALL IN MIXED AIR TEMPERATURE BELOW 38 °F, THE UNIT SHALL DE-ENERGIZE, THE OUTSIDE AIR DAMPER SHALL FULLY CLOSE, THE COOLING AND HEATING COIL VALVES SHALL FULLY OPEN, AND AN ALARM

SHALL BE SIGNALED TO THE DDC SYSTEM.

ON RECEIPT OF A SIGNAL FROM EITHER OF THE AIR HANDLER'S CORRESPONDING DUCT SMOKE DETECTOR, THE UNIT SHALL DEENERGIZE AND AN ALARM SHALL BE SIGNALED TO THE DDC SYSTEM. THE UNIT WILL DEENERGIZE AND GENERATE AN ALARM UPON RECEIVING A SIGNAL FROM THE EMERGENCY STOP SWITCH.

UPON DEENERGIZING OF THE UNIT FOR ANY REASON, THE OUTSIDE AIR DAMPER SHALL FULLY CLOSE.

UNOCCUPIED MODE:

UPON ENTERING UNOCCUPIED MODE, THE UNIT'S SUPPLY FAN SHALL DE-ENERGIZE, THE OUTSIDE AIR DAMPER SHALL FULLY CLOSE. ON A CALL FOR HEATING IN THE UNOCCUPIED MODE, THE SUPPLY AIR FAN VFD SHALL ENERGIZE AND MODULATE FAN SPEED TO MAINTAIN DOWN DUCT STATIC PRESSURE AT SETPOINT. THE OUTSIDE AIR DAMPER SHALL REMAIN CLOSED AND THE HEATING COIL VALVE SHALL MODULATE TO MAINTAIN

THE DISCHARGE AIR TEMPERATURE AT SETPOINT.

UPON A CALL FOR COOLING FROM ANY OF THE ZONES SERVED BY THE AHU, THE SUPPLY AIR FAN VFD SHALL ENERGIZE AND MODULATE FAN SPEED TO MAINTAIN DOWN DUCT STATIC PRESSURE AT SETPOINT. THE OUTSIDE AIR DAMPER SHALL REMAIN CLOSED AND THE COOLING COIL VALVE SHALL MODULATE TO MAINTAIN

DISCHARGE AIR TEMPERATURE AT SETPOINT.

MORNING WARMUP PULLDOWN:

PRIOR TO TRANSITIONING FROM UNOCCUPIED TO OCCUPIED MODE, THE UNIT SHALL EXECUTE A MORNING WARMUP/PULLDOWN SEQUENCE. THE UNIT SHALL IMPLEMENT AN OPTIMAL START ALGORITHM TO MINIMIZE THE WARMUP OR PULLDOWN PERIOD WHILE STILL ACHIEVING COMFORT CONDITIONS BY THE START OF THE

SCHEDULED OCCUPIED PERIOD.

H W

S H

W R

H W

C O

IL

T

SUPPLY FAN

MS

UH-1 & EF-2 SEQUENCE OF OPERATION :

UH-1 UNIT SHALL BE CONTROLLED BY DDC AND 2-WAY HEATING

COIL VALVE SHALL OPEN AND FAN SHALL RUN TO MAINTAIN 60°F

(ADJ) IN SPACE AIR TEMPERATURE DURING WINTER.

UH-1 FAN SHALL RUN TO MAINTAIN 85°F (ADJ) IN SPACE AIR

TEMPERATURE DURING SUMMER.

UPON A RISE IN SPACE AIR TEMPERATURE ABOVE 85°F (ADJ),

OUTSIE AIR DAMPER AND EXHAUST AIR DAMPER OPEN AND

EXHAUST FAN SHALL RUN. UPON A FALL IN SPACE AIR

TEMPERATURE BELOW 85°F (ADJ) REVERSE SHALL OCCUR.

OUTSIDE & EXHAUST AIR DAMPERS SHALL BE INTERLOCKED TO

EXHAUST FAN.

THE BUILDING DDC SYSTEM SHALL MONITOR FANs & DAMPERs STATUs AND SPACE TEMPERATURE. UPON SENSING UNIT FAILURE

THE ALARM SHALL BE SENT TO THE BUILDING DDC SYSTEM.

AI1 BO1

BO2 BI2

MD

OUTSIDE AIR

DAMPER

BACKDRAFT

EXHAUST

AIR DAMPER

EXHAUST FAN

MS

BO3 BI3

BI4

EF-1 SEQUENCE OF OPERATION :

THE UNIT SHALL RUN ACCORDING TO A USER DEFINABLE TIME SCHEDULE.

OCCUPIED MODE:

UNIT EXHAUST AIR DAMPER OPEN AND EXHAUST FAN SHALL RUN.

UNOCCUPIED MODE:

UNIT EXHAUST AIR DAMPER CLOSE AND EXHAUST FAN SHALL STOP.

THE BUILDING DDC SYSTEM SHALL MONITOR FAN STATU. UPON SENSING UNIT FAILURE THE ALARM SHALL BE SENT TO THE BUILDING

DDC SYSTEM.

BACKDRAFT

EXHAUST AIR

DAMPER

EXHAUST FAN

MS

BO3 BI3

H W

S H

W R

H W

C O

IL

T

FTR SEQUENCE OF OPERATION :

FTR -1 UNIT SHALL BE CONTROLLED BY DDC AND 2-WAY HEATING COIL VALVE SHALL OPEN AND FAN SHALL RUN TO MAINTAIN 68°F (ADJ) IN SPACE

AIR TEMPERATURE.

THE BUILDING DDC SYSTEM SHALL MONITOR SPACE TEMPERATURE. UPON SENSING UNIT FAILURE THE ALARM SHALL BE SENT TO THE BUILDING

DDC SYSTEM.

AI1 BO1

SATISFACTORY TO

APPROVED

ACTIVITY

DATE

FOR COMMANDER NAVFAC

SEAL

A/E INFO

A

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1 2 3 4 5

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SCALE:

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NAVFAC DRAWING NO.

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12,819,614

LXL LXL

06/15/2020

KIRK STEVENS

LILY LI, P.E.

1487319

N/A

NOT TO SCALE

AHU-1 VARIABLE AIR HANDLING UNIT CONTROL SEQUENCE AND DIAGRAMA3

AHU-1 DCC POINT LIST

CONTROL MARK POINT NAME

AI1 2/3 DUCT PRESSURE

AI2 OUTSIDE AIR TEMPERATURE

AI3 SUPPLY AIR TEMPERATURE

AI4 MIXED AIR TEMPERATURE

AI5 MIN OA FLOW

AI6 RETURN AIR TEMPERATURE

AO1 SUPPLY FAN SPEED

AO2 CW CONTROL VALVE

AO3 HW CONTROL VALVE

AO4 OA AIR DAMPERS %OPEN

AO5 RETURN AIR DAMPERS %OPEN

BI1 DUCT HIGH STATIC ALARM

BI2 SUPPLY FAN STATUS

BI3 FILTER STATUS

BI4 FILTER STATUS

BI5 OA AIR DAMPER STATUS

BI6 RA AIR DAMPER STATUS

BI7 SMOKE DETECTOR STATUS

BI8 LOW LIMIT TEMP STATUS

BO1 SUPPLY FAN START/STOP

NOT TO SCALE

RM108 ROOM CONTROL SEQUENCE AND DIAGRAM (TYP. OF RM110)A1

RM108 DCC POINT LIST

CONTROL MARK POINT NAME

AI1 SPACE TEMPERATURE

BI2 SUPPLY FAN STATUS

BI3 EXHAUST FAN STATUS

BI4 OA AIR DAMPER STATUS

BO1 HW CONTROL VALVE

BO2 SUPPLY FAN START/STOP

BO3 EXHAUST FAN START/STOP

NOT TO SCALE

EF-1 CONTROL SEQUENCE AND DIAGRAMB1

EF-1 DCC POINT LIST

CONTROL MARK POINT NAME

BI3 EXHAUST FAN STATUS

BO3 EXHAUST FAN START/STOP

NOT TO SCALE

FTR CONTROL SEQUENCE AND DIAGRAM (TYP.)C1

FTR DCC POINT LIST

CONTROL MARK POINT NAME

AI1 SPACE TEMPERATURE

BO1 HW CONTROL VALVE

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HWP-2

B-2 B-1

AHU-1

AHU-2

VAV-2

VAV-1

CRAHU-2

T1

PP - 1,3,5

PP - 2,4,6

L - 1

PP - 7,9,11

PP - 8,10,12

PP - 13,15,17

PP - 19,21,23

PP - 20,22,24

L - 32

L - 34

TELEPHONE BACKBOARD

VFD

VFD

VFD

VFD

MECH/ELEC

107112

SATISFACTORY TO

APPROVED

ACTIVITY

DATE

FOR COMMANDER NAVFAC

SEAL

A/E INFO

A

B

C

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1 2 3 4 5

1 2 3 4 5

A

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SCALE:

CONSTR. CONTR. NO.

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NAVFAC DRAWING NO.

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12,819,626

CJM CJM

6/15/2020

KIRK STEVENS

LILY LI, P.E.

1487319

N/A

0 2" 4" 8"SCALE: 3/8" = 1'-0" (E-101)

PARTIAL FIRST FLOOR POWER PLAN - MECHANICAL & TRAINER RMA1

GENERAL NOTES

NOTES

KEY PLAN

1 REFER TO SHEET E-001 FOR GENERAL NOTES.

2 COORDINATE FIRE ALARM WORK WITH FIRE PROTECTION DRAWINGS AND

MANUFACTURER'S RECOMMENDATIONS.

3 IF A CONFLICT OCCURS WITH THE LAYOUT OF ARCHITECTURAL, MECHANICAL,

PLUMBING OR FIRE PROTECTION DEVICES, NOTIFY THE CONTRACTING OFFICER

PRIOR TO PROCEEDING WORK.

4 COORDINATE ELECTRICAL CONNECTIONS TO ARCHTECTURAL, MECHANICAL

AND PLUMBING EQUIPMENT WITH MANUFACTURER'S RECOMMENDATIONS TO

ENSURE PROPER OPERATION OF EQUIPMENT.

1 PROVIDE A 150A, 480/277V, 3P, 4W, 36 CIRCUIT, MCB, SURFACE-MOUNTED

PANELBOARD. CIRCUIT CONSISTS OF 4-#1/0 & 1-#6 GND. IN 2" CONDUIT BACK TO

PANEL MDP. CONTRACTOR SHALL VERIFY PANEL DIMENSIONS AND LOCATION

PRIOR TO ORDERING PANEL TO ENSURE IT WILL FIT IN AVAILABLE SPACE.

2 PROVIDE A NEW 150A, 3P, 480V CIRCUIT BREAKER IN PANEL MDP. EXISTING MDP

IS ARROW HART TYPE.

3 RELOCATE DDC CONTROL PANEL TO WALL. CONTRACTOR SHALL REROUTE

FEEDER CONDUIT TO PANEL'S NEW LOCATION. COORDINATE WORK WITH

MECHANICAL PLANS. REROUTE CONDUITS ALONG WALL TO ALLOW FOR

PLACEMENT OF PANEL.

4 REROUTE EXISTING CIRCUIT TO NEW CONTROLS AND EXTEND CIRCUIT TO NEW

PANEL "PP". REFER TO MECHANICAL DRAWINGS FOR DETAILS. LABEL

CONTROLLER FOR RESPECTIVE VENILATOR UNIT.

5 PROVIDE FEEDER FOR NEW DDC PANEL FROM PANEL L. CIRCUIT CONSISTS OF

2-#12 & 1-#12 GND. IN 1/2"C. PROVIDE PLENUM-RATED, CAT 6 CABLE FROM

TELEPHONE BACKBOARD TO NEW DDC PANEL.

6 PROVIDE A 30A, 3P, 600V, NEMA 1, FUSED DISCONNECT SWITCH FOR AHU.

FUSES SHALL BE RATED AT 25A. CIRCUIT CONSISTS OF 3-#10 & 1-#10 GND. IN

3/4"C. LABEL DISCONNECT SWITCH AHU-1 OR AHU-2 FOR RESPECTIVE UNIT.

7 VFD PROVIDED WITH AIR HANDLING UNIT. CONNECT PER MANUFACTURER'S

RECOMMENDATIONS.

8 PROVIDE A 30A, 3P, 600V, NEMA 1, FUSED DISCONNECT SWITCH FOR CRAHU-2.

FUSES SHALL BE RATED AT 30A. CIRCUIT CONSISTS OF 3-#8 & 1-#10 GND. IN

3/4"C. LABEL DISCONNECT SWITCH FOR RESPECTIVE UNIT.

9 PROVIDE A 30A, 2P, 240V, NEMA 1, FUSED DISCONNECT SWITCH FOR UNIT

HEATER. FUSES SHALL BE RATED AT 5A. CIRCUIT CONSISTS OF 2-#12 & 1-#12

GND. IN 1/2"C. CIRCUIT IS 120V. LABEL DISCONNECT SWITCH FOR RESPECTIVE

UNIT.

10 PROVIDE A 20A, 1P, 120V, MOTOR-RATED, TOGGLE SWITCH. MOUNT SWITCH ON

VAV BOX. CIRCUIT CONSISTS OF 2-#12 & 1-#12 GND. IN 1/2"C.

11 PROVIDE A 30A, 3P, 600V, NEMA 1, FUSED DISCONNECT SWITCH FOR HOT

WATER PUMP. FUSES SHALL BE RATED AT 5A. CIRCUIT CONSISTS OF 3-#10 &

1-#10 GND. IN 1/2"C. LABEL HWP-1 OR HWP-2 FOR RESPECTIVE UNIT.

PLAN

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FLOOR 1

PLAN

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