1201 NORTH BOWSER ROADRICHARDSON, TEXAS 75081-2275TEL (214) 346-6200FAX (214) 739-0095WWW.HALFF.COMTBPE F-312

R

3/2

8/2

019

11

:41

:03

AM

C:\

Revit L

oca

l\35

128.0

01_M

EP

_H

AL

FF

_2

01

8_

ah

35

30

.rvt

35128.001

CHILLER PLANT EXPANSION

CITY OF MESQUITE

03/28/19

757 N GALLOWAYAVE, MESQUITE, TX

75149

CONSTRUCTION DOCUMENTS

1. INFORMATION ON THIS PLAN HAS BEEN OBTAINED FROM EXISTING DRAWINGS AND SITE SURVEY. CONTRACTOR SHALL FIELD VERIFY EXISTING CONDITIONS PRIOR TO COMMENCING WORK. ANY DISCREPANCIES BETWEEN EXISTING CONDITIONS AND CONSTRUCTION DOCUMENTS SHALL BE REPORTED IMMEDIATELY TO THE ENGINEER.

2. THE CONTRACTOR IS FULLY RESPONSIBLE FOR PERFORMING THE WORK IN FULL COMPLIANCE WITH ALL APPLICABLE LOCAL, STATE, AND FEDERAL CODES UNDER THIS SECTION OF THE CONTRACT. IF THE CONTRACTOR DETERMINES THAT THE CONTRACT DOCUMENTS AND PLANS ARE NOT IN COMPLIANCE WITH THE APPLICABLE LOCAL CODES, HE SHALL INFORM THE ENGINEER PRIOR TO CONSTRUCTION START FOR DIRECTION. FAILURE TO DO SO SHALL NOT RELIEVE THE CONTRACTOR OF HIS RESPONSIBILITY TO MEET APPLICABLE LOCAL CODES, AND REWORK SHALL BE AT CONTRACTOR'S EXPENSE.

3. ON ANY WORK SHOWN ON MECHANICAL DRAWINGS REQUIRING DEMOLITION OF EXISTING OR NEW BUILDING STRUCTURES AND FINISHES, IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO COMPLETE THE NECESSARY DEMOLITION. CONTRACTOR SHALL PATCH AND REPAIR ALL DEMOLITION WORK. PATCHING SHALL BE COMPLETED WITH THE SAME MATERIALS AS THE SURROUNDING AREAS, OR WITH ENGINEER-APPROVED PATCHING MATERIALS. REPAIRS SHALL BE COMPLETED ACCORDING TO SPECIFICATIONS.

4. MOUNT ALL SENSORS IN THE GENERAL LOCATION INDICATED ON THE PLANS. CONTRACTOR SHALL SUPPLY AND INSTALL ALL CONTROL VOLTAGE WIRING AND CONDUIT FOR SENSORS REQUIRED BY THE DDC CONTROL SYSTEM.

5. CONTRACTOR SHALL INSTALL NEW PIPING FLUSH WITH THE BUILDING STRUCTURE AND MECHANICAL ROOF BOUNDARIES AS SHOWN. CONTRACTOR SHALL COORDINATE ALL INSTALLATION WORK WITH ELECTRICAL CONDUIT. MECHANICAL CONTRACTOR SHALL FAMILIARIZE HIMSELF WITH THE WORK SCOPE OF OTHER TRADES AND PARTICIPATE IN COORDINATING ALL CONSTRUCTION EFFORTS.

6. ALL PIPING SHALL BE INSULATED AND JACKETED. REFER TO THE SPECIFICATIONS. CONDENSER COILS ARE TO BE COATED IN ACCORDANCE WITH THE SPECIFICATIONS.

7. VERIFY THE LOCATION OF ALL WALLS, PARTITIONS, DOORS, CABINETS, AND CEILINGS FROM ACTUAL FIELD MEASUREMENTS.

GENERAL MECHANICAL NOTES

ABV ABOVEAAV AUTOMATIC AIR VALVEAFF ABOVE FINISHED FLOORAFMS AIRFLOW MEASURING STATIONAMB AMBIENTAPD AIR PRESSURE DROP

BD BLOWDOWNBDD BACKDRAFT DAMPERBF BLIND FLANGEBFP BACKFLOW PREVENTERBFV BUTTERFLY VALVEBHP BRAKE HORSEPOWERBLV BALANCING VALVEBLW BELOWBMS BUILDING MANAGEMENT SYSTEMBOD BOTTOM OF DUCTBOP BOTTOM OF PIPEBOS BOTTOM OF STEELBV BALL VALVE

CAP CAPACITYCENT CENTRIGUFALCFH CUBIC FEET PER HOURCHWS CHILLED WATER SUPPLYCHWR CHILLED WATER RETURNCMBST COMBUSTION AIRCL CENTERLINECV CONTROL VALVE OR

CONSTANT VOLUME

D DIFFUSER OR DAMPERDB DRY BULBDBA DECIBELSDDC DIRECT DIGITAL CONTROLDEG DEGREESDIA DIAMETERDN DOWNDP DEW POINTDX DIRECT EXPANSION

EAT ENTERING AIR TEMPERATUREEDB ENTERING DRYBULB

TEMPERATUREEFF EFFICIENCYEMS ENERGY MANAGEMENT SYSTEMENT ENTERINGESP EXTERNAL STATIC PRESSUREEWB ENTERING WETBULBEWT ENTERING WATER

TEMPERATURE

FCV FLOW CONTROL VALVEFLA FULL LOAD AMPFLEX FLEXIBLEFM FLOW METERFRM FROMFWL FIXED WALL LOUVER

GR GRILLEGV GATE VALVE

HZ CYCLES PER SECOND (HERTZ)

kW KILOWATT

LAT LEAVING AIR TEMPERATURELDB LEAVING DRYBULB

TEMPERATURELP LIQUID PROPANELWT LEAVING WATER TEMPERATURE

MECHANICAL GENERAL ABBREVIATIONS

MAX MAXIMUMMFR MANUFACTURERMIN MINIMUMMVD MOTORIZED VOLUME DAMPERMW MAKEUP WATER

NC NORMALLY CLOSEDNK NECKNO NORMALLY OPEN OR NUMBERNTS NOT TO SCALE

OA OUTSIDE AIROBD OPPOSED BLADE DAMPER

PD PRESSURE DROPPH PHASEPI PRESSURE INDICATORPRV PRESSURE RELIEF VALVEPS PRESSURE SENSORPSV PRESSURE SAFETY VALVEPTRV PRESSURE TEMPERATURE

RELIEF VALVEPV PLUG VALVEPCW PRIMARY CHILLED WATERPCWS PRIMARY CHILLED WATER

SUPPLYPCWR PRIMARY CHILLED WATER

RETURNPCWP PRIMARY CHILLED WATER PUMP

RA RETURN AIR (RTN)RE: REFER TORED REDUCERREG REGISTERRH RELATIVE HUMIDITYRPM REVOLUTIONS PER MINUTE

SA SUPPLY AIRSCWR SECONDARY CHILLED WATER

SUPPLYSCWP SECONDARY CHILLED WATER

PUMPSENS SENSIBLESL SOUND LININGSD SMOKE DETECTORSOV SOLENOID OPERATED VALVE OR

SHUT-OFF VALVESP STATIC PRESSURESS STAINLESS STEELSQ FT SQUARE FEET

TOD TOP OF DUCTTOP TOP OF PIPETOS TOP OF STEELTS TEMPERATURE SENSORTSTAT THERMOSTATTSP TOTAL STATIC PRESSURE

UNO UNLESS NOTED OTHERWISE

VEL VELOCITYVTR VENT THROUGH ROOF

WB WET BULBWPD WATER PRESSURE DROPWTR WATERWxHxL WIDTH BY HEIGHT BY LENGTH

1. INFORMATION ON THE PLAN HAS BEEN OBTAINED FROM EXISTING DRAWINGS AND SITE SURVEY. CONTRACTOR SHALL VERIFY EXISTING CONDITIONS PRIOR TO COMMENCING WORK. ANY DISCREPANCIES BETWEEN EXISTING CONDITIONS AND CONSTRUCTION DOCUMENTS SHALL BE REPORTED IMMEDIATELY TO THE ENGINEER AND/OR ARCHITECT.

2. THE CONTRACTOR IS FULLY RESPONSIBLE FOR PERFORMING THE DEMOLITION WORK UNDER THIS SECTION OF THE PROJECT IN FULL COMPLIANCE WITH ALL APPLICABLE LOCAL, STATE, AND FEDERAL CODES. IF THE CONTRACTOR DETERMINES THAT THE CONTRACT DOCUMENTS AND PLANS ARE NOT IN COMPLIANCE WITH THE APPLICABLE CODES, HE SHALL INFORM THE ARCHITECT PRIOR TO CONSTRUCTION START FOR DIRECTION. FAILURE TO DO SO SHALL NOT RELIEVE THE CONTRACTOR OF HIS RESPONSIBILITY TO MEET CODE REQUIREMENTS AND REWORK SHALL BE AT CONTRACTOR'S EXPENSE. APPLICABLE CODES AND STANDARDS ON DEMOLITION WORK SHALL INCLUDE THOSE PUBLISHED BY OSHA AND EPA. AN ASBESTOS SURVEY SHALL BE KEPT ON SITE AT ALL TIMES PER TEXAS DEPARTMENT OF HEALTH REQUIREMENTS.

3. ALL DUST PRODUCTION, SMOKE PRODUCTION AND NOISE SHALL BE SUBJECT TO REAL TIME REVIEW BY THE ARCHITECT. WORK SHALL BE SHUT DOWN DURING CRITICAL ACTIVITIES BY FORMAL REQUEST FROM THE DESIGNATED AUTHORITY OR CONTRACTING ARCHITECT. WORK IN DUSTY AREAS SHALL BE CONTROLLED WITH TEMPORARY PARTITIONS. FLAME CUTTING SHALL BE MINIMIZED TO ELIMINATE SMOKE PRODUCTION. PROVIDE FIRE EXTINGUISHERS IN THE IMMEDIATE AREA.

4. ON ANY WORK SHOWN ON ELECTRICAL DRAWINGS WHICH REQUIRES DEMOLITION OF BUILDING STRUCTURES AND FINISHES, IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO COMPLETE THE NECESSARY DEMOLITION. CONTRACTOR SHALL PATCH AND REPAIR ALL BUILDING DAMAGE CREATED BY DEMOLITION WORK. PATCHING SHALL BE COMPLETED WITH THE SAME MATERIALS AS THE SURROUNDING AREAS, OR WITH ARCHITECT APPROVED PATCHING MATERIALS.

5. ALL OPENINGS CUT IN MASONRY AND PLASTER WALLS OR CONCRETE FLOORS SHALL BE CORE-DRILLED OR SAWED WHEN POSSIBLE. CONTRACTOR SHALL CHECK BUILDING CONSTRUCTION WITH STRUCTURAL ENGINEER BEFORE MAKING PENETRATIONS TO AVOID CUTTING THROUGH STRUCTURAL BEAMS AND REINFORCING. CONTRACTOR SHALL INFORM THE ENGINEER IF REINFORCING IS CUT OR DAMAGED WHILE MAKING OPENINGS AS REQUIRED BY DRAWINGS AND SPECIFICATIONS. PATCH AND SEAL OPENINGS WITH 8000 PSI CEMENT GROUT. INSTALL DECORATIVE TRIM (EQUIPMENT FLANGES, FRAMING, OR ESCUTCHEONS) AROUND OPENINGS IN FINISHED AREAS. COORDINATE ALL CUTTING AND PATCHING WITH THE OTHER TRADES.

6. ALL SURFACES COVERED BY "SPRAY POLY" AND PROTECTED BY TEMPORARY PARTITIONS SHALL REMAIN PROTECTED THROUGHOUT THE PROJECT. REMOVE THE PROTECTIVE BARRIERS ONLY AFTER THE NEW DEVICES, JUNCTION BOXES AND CONDUITS INSTALLED. PATCH AND MAINTAIN THE PROTECTIVE BARRIERS DURING CONSTRUCTION. COVER ALL EQUIPMENT OPENINGS WITH 4 MIL. POLY AND DUCT TAPE IN PLACE.

7. CONTRACTOR SHALL KEEP THE ENTIRE MEP DEMOLITION SITE CLEAN AT ALL TIMES.

8. CONTRACTOR AND OWNER SHALL BE FULLY RESPONSIBLE TO IDENTIFY ANY AND ALL ASBESTOS PRESENT IN THE BUILDING PRIOR TO DEMOLITION AS REQUIRED BY LAW.

9. COORDINATION AMONG OTHER CONSTRUCTION DISCIPLINES PRIOR TO DEMOLITION IS MANDATORY.

10. ALL WORK SHALL BE PERFORMED IN ACCORDANCE WITH THE IBC CODE, NEC AND LOCAL CODES. ALL TRADES SHALL COORDINATE ON PLACEMENT OF NEW EQUIPMENT.

11. ELECTRICAL PLANS ARE DIAGRAMMATIC ONLY.

12. ALL CONDUCTORS SHALL BE COPPER. ALL CONDUCTORS #8 AWG AND LARGER SHALL BE STRANDED AND SIZES #10 AWG, #12 AWG SHALL BE SOLID. ALL CONDUCTORS SHALL BE STANDARD CODE TYPE "THWN" INSULATED EXCEPT AS REQUIRED OTHERWISE PER THE NEC. ALL CONDUCTORS SHALL BE DURABLY MARKED ON THE SURFACE TO INDICATE RATED VOLTAGE, INSULATION CODE, USE, MANUFACTURER, AND AWG SIZE. THE COLOR CODING SHALL BE CONTINUOUS AND SHALL EXTEND TO PANELS AND MOTORS.ALL #8 AWG AND SMALLER CONDUCTORS SHALL BE SPLICED WITH WATERPROOF CONNECTORS.CONNECTORS SHALL BE SCOTCHLOCK, BUCHANAN B-CAP, OR APPROVED EQUAL.

13. THE CONTRACTOR SHALL BE RESPONSIBLE FOR CORRECTLY PHASING THE CIRCUITS IN THE PANELBOARDS. THREE SINGLE-PHASE CIRCUITS MAY BE COMBINED IN ONE CONDUIT WITH A COMMON NEUTRAL, PROVIDED EACH CIRCUIT IS ON AN OPPOSITE PHASE, UNLESS OTHERWISE INDICATED. USE MULTI-POLE CIRCUIT BREAKERS FOR MULTI-WIRE BRANCH CIRCUITS.

14. ELECTRICAL CONTRACTOR SHALL REFER TO TPS DRAWINGS FOR LOCATION OF TPS EQUIPMENT. ELECTRICAL CONTRACTOR SHALL COORDINATE AND VERIFY VOLTAGE/ PHASE INDICATED ON ELECTRICAL DRAWINGS WITH TPS EQUIPMENT TO BE PROVIDED PRIOR TO INSTALLING ELECTRICAL SERVICE SHOULD A DISCREPANCY BE NOTED BETWEEN EQUIPMENT TO BE SUPPLIED AND WHAT IS INDICATED ON THE THE DRAWINGS, CONTRACTOR SHALL OBTAIN WRITTEN DIRECTIONS FROM ENGINEER BEFORE PROCEEDING WITH WORK.

15. CONTRACTOR SHALL VISIT SITE PRIOR TO BID TO DETERMINE EXACT SCOPE OF WORK.

16. NEW DIRECTORY CARDS SHALL BE PROVIDED AT COMPLETION OF TENANT WORK WITH TYPED DESIGNATIONS INDICATING NAME, VOLTAGE, PHASE, ETC. AND FINAL CIRCUITING OF PANELBOARDS DEPICTING EACH POLE POSITION IN A TWO COLUMN FASHION. ROOM NUMBERS SHALL BE USED WHENEVER POSSIBLE ON CIRCUIT DESIGNATIONS. WHEN NEW CARDS ARE TYPED, EXISTING INFORMATION ON THE EXISTING CARDS THAT REMAINS APPLICABLE SHALL BE TRANSFERRED TO NEW CARDS, REGARDLESS OF TOLK DESIGNATIONS SUCH AS "EXISTING LOAD".

17. THE EQUIPMENT GROUNDING SYSTEM SHALL CONSIST OF THE ELECTRICALLY CONTINUOUS METALLIC CONDUIT SYSTEM TOGETHER WITH INSULATED EQUIPMENT GROUNDING CONDUCTORS. EVERY ITEM OF EQUIPMENT SERVED BY THE ELECTRICAL SYSTEM SHALL BE BONDED TO THE BUILDING EQUIPMENT GROUND. THE EQUIPMENT GROUNDING SYSTEM SHALL BE DESIGNED SO ALL METALLIC STRUCTURES, ENCLOSURES, RACEWAYS, JUNCTION BOXES, OUTLET BOXES, CABINETS, MACHINE FRAMES, PORTABLE EQUIPMENT AND OTHER CONDUCTIVE ITEMS IN CLOSE PROXIMITY WITH ELECTRICAL CIRCUITS OPERATE CONTINUOUSLY AT GROUND POTENTIAL AND PROVIDE A LOW IMPEDANCE PATH FOR POSSIBLE GROUND FAULT CURRENTS. THE SYSTEM SHALL COMPLY WITH THE NATIONAL ELECTRICAL CODE. ALL BRANCH CIRCUITS AND FEEDERS SHALL HAVE A GREEN INSULATED EQUIPMENT GROUNDING CONDUCTOR SIZED IN ACCORDANCE WITH THE NEC.

18. AT LEAST 6 INCHES OF FREE CONDUCTOR SHALL BE LEFT AT EACH OUTLET, JUNCTION, AND SWITCH POINT FOR SPLICES OR THE CONNECTION OF FIXTURES AND DEVICES. FOR WIRE-BINDING SCREW POSTS, WRAP THE FRESHLY STRIPPED END OF THE CONDUCTOR TWO-THIRDS TO THREE-QUARTERS OF THE DISTANCE AROUND THE POST. THE LOOP SHALL BE MADE SO THAT ROTATION OF THE SCREW IN TIGHTENING WILL TEND TO WRAP THE WIRE AROUND THE POST RATHER THAN UNWRAP IT.

ELECTRICAL GENERAL NOTES

19. MOLDED CASE CIRCUIT BREAKERS SHALL BE OPERATED BY A TOGGLE-TYPE HANDLE AND SHALL HAVE A QUICK-MAKE, QUICK-BREAK, OVER-CENTER SWITCHING MECHANISM THAT IS MECHANICALLY TRIP-FREE FROM THE HANDLE SO THAT THE CONTACTS CANNOT BE HELD CLOSED AGAINST SHORT CIRCUITS AND ABNORMAL CURRENTS. TRIPPING DUE TO OVERLOAD OR SHORT CIRCUIT SHALL BE CLEARLY INDICATED BY THE HANDLE AUTOMATICALLY ASSUMING A POSITION MIDWAY BETWEEN THE MANUAL ON AND OFF POSITIONS. ALL LATCH SURFACES SHALL BE GROUND AND POLISHED. POLES SHALL BE SO CONSTRUCTED THAT THEY CAN OPEN, CLOSE AND TRIP SIMULTANEOUSLY. BREAKERS SHALL BE COMPLETELY ENCLOSED IN A MOLDED CASE WITH THE AMPERE RATINGS CLEARLY VISIBLE. CONTACTS SHALL BE NON-WELDING SILVER ALLOY. BREAKERS SHALL BE UL LISTED FOR USE WITH 75°C AND 90°C INSULATED WIRE. CIRCUIT BREAKER RATINGS, MODIFICATIONS, ETC., SHALL BE AS INDICATED ON THE DRAWINGS. MOLDED-CASE CIRCUIT BREAKERS SHALL BE AS FOLLOWS:

A. THERMAL MAGNETIC TYPE THAT PROVIDES INVERSE TIME-DELAY OVERLOAD AND INSTANTANEOUS SHORT CIRCUIT PROTECTION BY MEANS OF A THERMAL MAGNETIC ELEMENT.

B. MULTI-POLE BREAKERS SHALL BE OF THE COMMON TRIP TYPE HAVING A SINGLE OPERATING HANDLE.

C. ALL CIRCUIT BREAKERS SHALL BE FULL SIZE AND BOLT-ON.

D. NEW CIRCUIT BREAKERS INSTALLED IN EXISTING PANELBOARDS SHALL MATCH THE SHORT CIRCUIT INTERRUPT RATING OF THE EXISTING CIRCUIT BREAKERS.

20. ALL CONDUIT SHALL BE RIGIDLY SUPPORTED TIGHT TO THE BUILDING STRUCTURE MAXIMUM SPACING OF SUPPORTS, 10'-0" FOR VERTICAL, AND 8'-0" FOR HORIZONTAL RUNS. NOT MORE THAN THE EQUIVALENT OF FOUR QUARTER BENDS SHALL BE USED IN ANY RUN BETWEEN TERMINALS AND CABINETS, OR BETWEEN OUTLETS AND JUNCTION OR PULL BOXES. CONTRACTOR SHALL PROVIDE THE NECESSARY NEC SIZED JUNCTION OR PULL BOXES.

21. CONTRACTOR SHALL GUARANTEE HIS WORKMANSHIP AND ALL MATERIALS AND EQUIPMENT FOR A PERIOD OF ONE YEAR IN WRITING COMMENCING UPON ACCEPTANCE OF INSTALLATION BY OWNER.

22. CONTRACTOR SHALL MAINTAIN ACCESS, SAFETY, AND CLEANLINESS IN AREA THAT EFFECTS THE FLOW OF TRAFFIC DUE TO RENOVATION.

23. ALL MATERIALS AND EQUIPMENT FURNISHED FOR THIS PROJECT SHALL BE NEW WHERE NO BUILDING STANDARD EXISTS, EQUIPMENT SHALL BE NEW AND U.L. LISTED AS MANUFACTURED BY G.E., SQUARE D, EATON, OR SIEMENS. MODIFICATIONS OR ADDITIONS TO EXISTING EQUIPMENT SHALL MATCH EXISTING TO MAINTAIN U.L. ASSEMBLY LISTING. CONTRACTOR WILL BE RESPONSIBLE FOR CONTACTING AND COORDINATING WITH OWNER ON DETERMINING ANY STANDARDS.

24. CONDUIT/CABLE SHALL BE PROVIDED AS FOLLOWS: ALL RIGID AND FLEXIBLE CONDUIT SHALL BE U.L. LISTED. ALL CONDUIT SHALL BE SUITABLE FOR THE INTENDED SERVICE AND LOCATION. THE CONTRACTOR SHALL COORDINATE ALL RACEWAY SYSTEM COMPONENTS AND LOCATIONS WITH ALL NEW WORK. CONTRACTOR SHALL COORDINATE WITH WORK OF OTHER TRADES. CONTRACTOR SHALL COORDINATE WITH ALL EQUIPMENT, ARCHITECTURAL AND STRUCTURAL ELEMENTS.

25. THE CONTRACTOR SHALL GIVE ALL NECESSARY NOTICES, OBTAIN ALL PERMITS AND PAY ALL GOVERNMENT SALES TAXES, FEES, AND OTHER COSTS, FILE ALL NECESSARY PLANS, PREPARE ALL DOCUMENTS AND OBTAIN ALL NECESSARY APPROVALS OF ALL GOVERNMENTAL DEPARTMENTS HAVING JURISDICTION; OBTAIN ALL REQUIRED CERTIFICATES OF INSPECTION OF HIS WORK AND DELIVER SAME TO THE ARCHiTECT BEFORE REQUEST FOR ACCEPTANCE AND FINAL PAYMENT FOR WORK.

26. FURNISH JUNCTION AND PULL BOXES WHERE REQUIRED BY THE CODE OR WHERE INDICATED OR REQUIRED TO FACILITATE PULLING WIRES REGARDLESS OF WHETHER SHOWN ON THE DRAWINGS OR NOT.

27. DURING THE PROGRESS OF THE WORK AND UPON COMPLETION, TESTS SHALL BE MADE AS SPECIFIED HEREIN AND AS REQUIRED BY AUTHORITIES HAVING JURISDICTION INCLUDING INSPECTORS, OWNER, OR ENGINEER. TESTS SHALL BE CONDUCTED BY THE CONTRACTOR AS PART OF THE WORK OF THIS DIVISION AND SHALL INCLUDE THE SERVICES OF QUALIFIED PERSONNEL AS WELL AS ALL EQUIPMENT, APPARATUS, AND SERVICES REQUIRED. TESTS SHALL INCLUDE OPERATION OF ALL MOTORS WITH DEMONSTRATION OF CONTROLS AND INTERLOCKS, OPERATION OF ALL ELECTRICAL EQUIPMENT.

28. SUBMITTALS SHALL INCLUDE PANELBOARDS, DISCONNECTS, WIRING DEVICES, LIGHT FIXTURES, AND CONDUCTORS SUBMITTAL DATA SHALL CONTAIN ONLY INFORMATION RELEVANT TO THE PARTICULAR EQUIPMENT OR MATERIALS TO BE FURNISHED FOR THE SPECIFIC PROJECT. CATALOG SHEETS WHICH DESCRIBE SEVERAL DIFFERENT ITEMS IN ADDITION TO THOSE ITEMS TO BE USED SHALL NOT BE SUBMITTED UNLESS RELEVANT INFORMATION IS CLEARLY MARKED.

29. RACEWAYS SHALL BE PROVIDED WITH EXPANSION FITTINGS AT BUILDING EXPANSION JOINTS AND OTHER AREAS WHERE NECESSARY TO COMPENSATE FOR THERMAL EXPANSION AND CONTRACTION.

30. MARK THE COVERS OF JUNCTION BOXES TO INDICATE THE CIRCUITS CONTAINED THEREIN WITH AN INDELIBLE MARKER.

31. ALL CONDUIT SHALL BE RIGIDLY SUPPORTED TIGHT TO THE BUILDING STRUCTURE MAXIMUM SPACING OF SUPPORTS, 10'-0" FOR VERTICAL, AND 8'-0" FOR HORIZONTAL RUNS. NOT MORE THAN THE EQUIVALENT OF FOUR QUARTER BENDS SHALL BE USED IN ANY RUN BETWEEN TERMINALS AND CABINETS, OR BETWEEN OUTLETS AND JUNCTION OR PULL BOXES. CONTRACTOR SHALL PROVIDE THE NECESSARY NEC SIZED JUNCTION OR PULL BOXES.

ELECTRICAL GENERAL LEGEND

ALL SYMBOLS SHOWN MAY NOT APPEAR IN ALL DRAWINGS.SYMBOLS ARE SHOWN SCHEMATIC AND MAY NOT BE TO SCALE.

SYMBOL DESCRIPTION

POWER - RECEPTACLES

DUPLEX GFI/WEATHER PROOF RECEPTACLE WITH "WHILE IN USE COVER - 20A/125V/1P/3W/G NEMA 5-20R. MOUNT 15" AFF

POWER - SPECIALTY POWER

JUNCTION BOX - SIZE & MOUNTING AS REQUIRED TYPICAL OF ALL.

POWER FOR DDC CONTROLS. COORDINATE WITH MECHANICAL CONTRACTOR FOR REQUIREMENTS AND LOCATION PRIOR TO ROUGH-IN.

POWER

DISCONNECT SWITCH - 30/-/3 INDICATES 30A, NONFUSED, 3-POLE; 30/30/3 INDICATES 30A, 30A FUSE, 3-POLE. MOUNT AS REQUIRED

PANEL BOARD.

CIRCUIT HOMERUN TO PANELBOARD.(2#12, 1#12G, 3/4"C 20A/1P CB UNO)

WIU

J

JDDC

J

TFM

THERMAL WELL WITH TEMPERATURE SENSOR

CHWR CHILLED WATER RETURN

PIPE TURNING UP

PIPE BRANCH TOP CONNECTION

PIPE BRANCH BOTTOM CONNECTION

PIPE TURNING DOWN

PUMP (FOR WATER FLOW DIAGRAM ONLY)

GATE VALVE

CHECK VALVE

GLOBE VALVE

THROTTLING VALVE (SEE SPECS)

DIRECTION OF PITCH (DOWN)

FLUID FLOW DIRECTION

BALL VALVE

BUTTERFLY VALVE

2-WAY MOTOR OPERATED CONTROL VALVEM

PLUG VALVE

SIGHT GLASS

TEST COCK

PLUGGED TEE

FLOW METER

PRESSURE GAUGE WITH VENT COCK

FLOW CONTROL VALVE

THERMOMETER

STRAINER

UNION

STRAINER WITH BLOWDOWN VALVE

FLEXIBLE PIPE CONNECTOR

CAPPED PIPE/OUTLET

CHWS CHILLED WATER SUPPLY

PIPE HEADER WITH BLIND FLANGE

VALVE AND BLIND FLANGE

PIPING SYMBOLS

DESCRIPTIONSYMBOL

T

MISCELLANEOUS SYMBOLS

POINT OF NEW CONNECTION TO EXISTING

01

M2.01

DIRECTION OF SECTION

BOLD DASHED LINE DESIGNATES DEMOLITION WORK

NUMBER OF REFERENCE DRAWING WHERE SECTION ISSHOWN.

IDENTIFYING NUMBER OR LETTER FOR SECTIONS.

MATCHLINE AMATCHLINE

MATCHLINE B

NUMBER OF REFERENCE DRAWING WHERE DETAIL IS SHOWN.

IDENTIFYING NUMBER OR LETTER FOR DETAILS.

ENLARGED DETAIL REFERENCE

PROJECT LOCATION

®

Sheet Number

Scale:

Checked By:

Drawn By:

Issued:

Project No.:

Sheet Title

3/2

8/2

019 1

2:0

9:2

1 P

MC

:\Revi

t Loca

l\35128.0

01_M

EP

_H

ALF

F_2018_ah3530.r

vt

As indicated

GENERAL NOTES

G0.01

BB

JG

03/28/19

35128.001

CH

ILL

ER

PL

AN

T E

XP

AN

SIO

N

CIT

Y O

F M

ES

QU

ITE

75

7 N

GA

LL

OW

AY

AV

E,

ME

SQ

UIT

E, T

X 7

514

9

THE SEAL APPEARING ON THISDOCUMENT WAS AUTHORIZED BY

JONATHAN C. GOWER, PE NO. 128593ON 3/28/19. ALTERATION OF A SEALED

DOCUMENT WITHOUT PROPERNOTIFICATION TO THE RESPONSBILE

ENGINEER IS AN OFFENSE UNDER THETEXAS ENGINEERING PRACTICE ACT.

SHEET INDEX

SHEETNo.:

SHEET TITLE REV DATE

G0.01 GENERAL NOTES

M1.01 MECHANICAL ROOF PLAN

M2.01 MECHANICAL DETAILS AND SCHEDULES

E1.01 POWER PLAN

Revis

ion

s

No

.D

ate

Descri

pti

on

THE SEAL APPEARING ON THISDOCUMENT WAS AUTHORIZED BY

JAMES J. WOMACK, PE NO. 55291 ON3/28/19. ALTERATION OF A SEALED

DOCUMENT WITHOUT PROPERNOTIFICATION TO THE RESPONSBILE

ENGINEER IS AN OFFENSE UNDER THETEXAS ENGINEERING PRACTICE ACT.

(EXISTING)CH-2

(EXISTING)CH-1

8"ø

8"ø

TO/FROMCHILLED WATER PUMPS

R

S

1

(EXISTING)EF-7

(EXISTING)EF-6

(EXISTING)EF-3

(EXISTING)EF-5

(EXISTING)EF-2

(EXISTING)EF-8

(EXISTING)EF-4

8"ø

8"ø

1

2 2

3

4

5 EMSCONTROL

PANEL

TYP.

EXISTING ELECTRICAL PANEL

(EXISTING)CH-2

(EXISTING)CH-1

CH-3

6"ø

6"ø 8"ø

TO/FROMCHILLED WATER PUMPS

R

S

1

(EXISTING)EF-4

(EXISTING)EF-2

(EXISTING)EF-5

(EXISTING)EF-8

(EXISTING)EF-3

(EXISTING)EF-6

(EXISTING)EF-7 8"ø 8"ø

8"ø

6

6

7

EMSCONTROL

PANEL

8

CHWS

CHWR

EXISTING ELECTRICAL PANEL

KEYPLAN

AREA OF WORK

PO

LIC

E D

EP

AR

TM

EN

T

CITY HALL

KEY NOTES:

1. CONFIRM OPERATION OF EXISTING BUTTERFLY ISOLATION VALVES AT THIS LOCATION. REMOVE EXISTING BLIND FLANGES ON EXISTING 8" CHILLED WATER SUPPLY AND RETURN LINES. REMOVE INSULATION AND JACKETING AS NEEDED TO ACCOMMODATE NEW PIPING CONNECTION.

2. EXISTING AIR COOLED CHILLER TO REMAIN IN OPERATION THROUGHOUT CONSTRUCTION.

3. EXISTING EXHAUST FAN TO REMAIN AND BE REUSED.

4. EXISTING CHILLER SUPPORT FRAME. NEW CHILLER MUST BE OF PROPER SIZE TO BE SUPPORTED BY THE EXISTING, ELEVATED STEEL FRAME.

5. EXISTING CHILLER SCREEN WALL TO REMAIN AND BE REUSED.

6. PROVIDE NEW FLANGED PIPING CONNECTION TO EXISTING 8" CHILLED WATER SUPPLY AND RETURN PIPING. REFER TO DETAIL '2' ON M2.01 AND UTILIZE EXISTING ROOF SUPPORTS FOR NEW PIPING. PROVIDE NEW HEAT TRACE ON NEW 6" PIPING AND CONNECT IN TO EXISTING HEAT TRACE CONTROLS. PROVIDE FIELD APPLIED ALUMINUM JACKET ON ALL NEW PIPING TO MATCH EXISTING INSTALLATION. REFER TO CHILLED WATER FLOW DIAGRAM ON M2.01 FOR ALL DEVICES REQUIRED IN NEW PIPING.

7. NEW AIR COOLED CHILLER CH-3 INSTALLED ON EXISTING STRUCTURAL FRAME. PROVIDE ELASTOMERIC VIBRATION ISOLATORS BETWEEN CHILLER AND FRAME ACCORDING TO MANUFACTURERS RECOMMENDATION.

8. EXISTING JCI CONTROL PANEL LOCATION IN EXISTING PUMP ROOM. EXTEND EXISTING CONTROLS AS NEEDED TO ACCOMMODATE NEW CHILLER POINTS. ALL CONTROLS WIRE TO BE ROUTED IN CONDUIT WHERE EXPOSED ON THE ROOF.

®

Sheet Number

Scale:

Checked By:

Drawn By:

Issued:

Project No.:

Sheet Title

3/2

8/2

019 1

1:4

0:5

6 A

MC

:\Revi

t Loca

l\35128.0

01_M

EP

_H

ALF

F_2018_ah3530.r

vt

As indicated

MECHANICAL ROOF PLAN

M1.01

BB

JG

03/28/19

35128.001

CH

ILL

ER

PL

AN

T E

XP

AN

SIO

N

CIT

Y O

F M

ES

QU

ITE

75

7 N

GA

LL

OW

AY

AV

E,

ME

SQ

UIT

E, T

X 7

514

9

THE SEAL APPEARING ON THISDOCUMENT WAS AUTHORIZED BY

JONATHAN C. GOWER, PE NO. 128593ON 3/28/19. ALTERATION OF A SEALED

DOCUMENT WITHOUT PROPERNOTIFICATION TO THE RESPONSBILE

ENGINEER IS AN OFFENSE UNDER THETEXAS ENGINEERING PRACTICE ACT.

1/4" = 1'-0"1DEMOLITION ROOF PLAN - MECHANICAL

1/4" = 1'-0"2ROOF PLAN - MECHANICAL

Revis

ion

s

No

.D

ate

Descri

pti

on

PETE'S PLUG(TYP)

THERMOMETER(TYP)

ELASTOMERIC ISOLATORS

FLEXIBLE CONNECTION

CONTROL PANEL

EXISTING STRUCTURAL SUPPORT

UNION (UP TO 2-1/2") FLANGE (3" & OVER)

SEPARABLE SOCKET(GAUGE WELL)

PRESSURE GAUGEW/ GATE VALVE

CHILLED WATER S & R

NOTE: ALL PIPE FITTINGS USED FOR TEMPERATURE, PRESSURE, AND DRAIN PORTS TO BE OF BRASS MATERIAL.

NO BLACK PIPE ALLOWED.

HIGH DENSITY INSULATION INSERT-LOWER HALF OF PIPE, TYPICAL.

TYPE 40 PROTECTION SHIELD , TYPICAL.

EXISTING PIPE SUPPORT FRAME

ALUMINUM JACKETING

NEW CH-3

EXISTING CH-2

EXISTING CH-1

TT

MT

MT

MT

P-1

P-2

P-3

8"8"

CHWS TO BLDG.

CH

WS

CH

WR

CHWR FROM BLDG.

8"

8"

ROOF

PLANT ROOM 2076

M

TFM

6"

6"

8"8"

4"

VFD

VFD

VFD

CONTROL SYSTEM POINTS LIST

POINT NAME TYPE ALARM NOTES

CHILLER CH-3 ENABLE / DISABLE

CHILLER CH-3 RUN STATUS

CHILLER CH-3 GENERAL ALARM

CHILLER CH-3 CURRENT LIMIT (% RLA)

CHILLER CH-3 CHILLED WATER ENTERING TEMPERATURE

CHILLER CH-3 CHILLED WATER LEAVING TEMPERATURE

CHILLER CH-3 CHILLED WATER ISOLATION VALVE

DP

DP

DP

EXISTING DEVICES SHOWN FOR

REFERENCE ONLY. ONLY

DEVICES RELATED TO CH-3 ARE NEW IN THIS PROJECT.

BO

BI IF NOT EQUAL TO COMMAND

BI YES

AI

CHILLER CH-3 CHILLED WATER EVAPORATOR DIFFERENTIAL PRESSURE

CHILLER CH-3 CURRENT LIMIT (% RLA) SETPOINT ADJUST AO

AI

AI

DO

AIUSE TO CALCULATE

FLOWIF FLOW EXCEEDS MAX

ALLOWED

UTILIZE EXISTING POINT (CHWR TEMP)

®

Sheet Number

Scale:

Checked By:

Drawn By:

Issued:

Project No.:

Sheet Title

3/2

8/2

019 1

1:4

0:5

9 A

MC

:\Revi

t Loca

l\35128.0

01_M

EP

_H

ALF

F_2018_ah3530.r

vt

As indicated

MECHANICAL DETAILS AND

SCHEDULES

M2.01

BB

JG

03/28/19

35128.001

CH

ILL

ER

PL

AN

T E

XP

AN

SIO

N

CIT

Y O

F M

ES

QU

ITE

75

7 N

GA

LL

OW

AY

AV

E,

ME

SQ

UIT

E, T

X 7

514

9

THE SEAL APPEARING ON THISDOCUMENT WAS AUTHORIZED BY

JONATHAN C. GOWER, PE NO. 128593ON 3/28/19. ALTERATION OF A SEALED

DOCUMENT WITHOUT PROPERNOTIFICATION TO THE RESPONSBILE

ENGINEER IS AN OFFENSE UNDER THETEXAS ENGINEERING PRACTICE ACT.

N.T.S.1

AIR COOLED CHILLER SCHEMATIC

N.T.S.2

PIPE SUPPORT DETAIL

N.T.S.3

CHILLED WATER FLOW DIAGRAM

EXISTING CHILLED WATER CONTROL SYSTEM SEQUENCE.

EDITS TO THE EXISTING SEQUENCE PERFORMED UNDER THIS PROJECT ARE IN BOLD AND UNDERLINED. ADD ALL NECESSARY HARDWARE AND SOFTWARE POINTS AND

CONTROL LOGIC TO INCORPORATE NEW CHILLER CH-3 INTO THE EXISTING CONTROL SYSTEM. CHILLERS SHALL NOW BE DESIGNATED: LEAD, LAG 1, AND LAG 2 AND

CONFORM TO THE REQUIREMENTS IN THE EXISTING SEQUENCE BELOW. NEW CHILLER CH-3 SHALL BE ADDED TO THE SYSTEM GRAPHICS AND BE CONSISTENT WITH EXISTING CH-1 AND CH-2 GRAPHICS.

A. GENERAL1. BMS SYSTEM SHALL ENABLE/DISABLE THE CHILLER PLANT BASED UPON:

A. TIME OF DAY SCHEDULEB. OPTIMAL START/STOPC. SYSTEM LOADD. TIMED OVERRIDEE. OUTDOOR AIR TEMPERATURE

THESE FIVE (5) START TYPES SHALL BE ABLE TO BE SELECTED BY THE BUILDING OPERATOR USING THE BUILDING AUTOMATION SOFTWARE. THESE FIVE (5) START TYPES SHALL BE REPRESENTED BY SOFTWARE ICONS, WHICH CAN BE SELECTED BY USING A POINT DEVICE.

2. THE BMS SHALL INDEPENDENTLY MONITOR THOSE POINTS INDICATED ON THE POINT LIST AND CONTROL DIAGRAM.

B. SEQUENCE OF OPERATION:1. THE CHILLER CONTROL SYSTEM SHALL MONITOR AND CONTROL THE CHILLED WATER PLANT, AND THE PACKAGED CHILLER MICROPROCESSOR, OR THE

CHILLERS DIRECTLY AS DESCRIBED BELOW:A. THE CHILLER SEQUENCING SOFTWARE SHALL PERFORM THE FOLLOWING CONTROL STRATEGIES, PROVIDE THE POINTS AS LISTED ON THE

CHILLER POINT LIST, AND SUPPORT SPECIFIED MONITORING DIAGNOSTICS.2. CHILLER INTERFACE TO THE CONTROL SYSTEM MAY BE ACCOMPLISHED BE EITHER OF THE METHODS OUTLINES BELOW:

A. PACKAGED CHILLER MICROPROCESSOR, WHICH IS FULLY COMPATIBLE WITH, AND FULLY CONVERSANT WITH THE CONTROL SYSTEM.B. GATEWAYS THAT PROVIDE FULL 2-WAY COMMUNICATION.

3. THE CHILLER PLANT SEQUENCING SOFTWARE SHALL BE CONTAINED IN THE EXTENDED CAMPUS-WIDE CONTROL SYSTEM.4. CHILLER SEQUENCING: THE CHILLER SEQUENCING SOFTWARE SHALL START, STOP AND MODULATE THE PUMPS AND CHILLERS BASED UPON:

• ENABLE/DISABLE SIGNAL FROM BMS• OPTIMAL START/STOP• SYSTEM LOAD

5. WHEN THE CHILLED WATER SYSTEM IN ENABLED, THE CHILLER SYSTEM CONTROL SHALL:1. ENABLE THE VARIABLE SPEED DISTRIBUTION PUMPING SYSTEM.2. OPEN THE LEAD CHILLER ISOLATION VALVE AND PROVE OPEN. BYPASS VALVE POSITIONED CLOSED.3. START AND PROVE BOTH PRODUCTION CHILLED WATER PUMPS.4. CONTINUALLY MONITOR THE DIFFERENTIAL PRESSURE ACROSS EACH CHILLER EVAPORATOR COIL AND CALCULATE THE CHILLED WATER

FLOW BASED ON FLOW FOR EACH CHILLER AT OPERATOR'S WORKSTATION.5. OPEN BYPASS VALVE, IF NECESSARY, TO OBTAIN PLANT MINIMUM FLOW (ADJ).6. ENABLE THE LEAD CHILLER ONCE MINIMUM FLOW ACROSS THE EVAPORATOR IS PROVEN.

6. WHEN THE CHILLED WATER SYSTEM IS DISABLED, THE CHILLER SYSTEM CONTROL SHALL:1. SHUT DOWN THE LEAD CHILLER.2. CONFIRM THE RESPECTIVE COMPRESSOR HAS STOPPED.3. SHUT DOWN THE PRODUCTION CHILLED WATER PUMPS.4. CLOSE RESPECTIVE CHILLER ISOLATION VALVE(S). BYPASS VALVE POSITIONED CLOSED.5. COMPRESSOR SHALL NOT BE RESTARTED FOR A FIVE MINUTE (ADJ.) DELAY.

7. THE CHILLER SEQUENCING SOFTWARE SHALL CONSIDER STARTING THE NEXT LAG CHILLER AS THE CHILLED WATER FLOW APPROACHES THE DESIGN

LEVEL OR THE LEAD CHILLER(S) CANNOT MAINTAIN THE CHWS TEMPERATURE. WHEN THE SYSTEM DETERMINES THE NEXT LAG CHILLER IS REQUIRED, THE CHILLER SEQUENCING SOFTWARE SHALL INITIATE THE START OF THE NEXT LAG CHILLER.

1. THE SYSTEM SHALL TEMPORARILY UNLOAD THE LEAD CHILLER TO 80% (ADJ.) THROUGH EITHER DEMAND LIMITING OR BY RAISING THE CHWS SETPOINT. MAINTAIN THE UNLOADED CONDITION FOR TEN MINUTES (ADJ.) BEFORE PROCEEDING.

2. SLOWLY OPEN THE LAG CHILLER ISOLATION VALVE UNTIL PROVEN OPEN. ENSURE MINIMUM FLOW IS MAINTAINED THROUGH THE LEAD CHILLER(S).

3. ONCE THE LAG CHILLER ISOLATION VALVE IS PROVEN OPEN, START THE LAG CHILLER.4. ONCE LAG CHILLER OPERATION IS CONFIRMED, RELEASE THE TEMPORARY DEMAND LIMIT OR CHWS TEMPERATURE RESET.5. MODULATE THE PUMPS THROUGH RESPECTIVE VFD TO MAINTAIN MINIMUM FLOW REQUIRED TO MEET DEMAND.6. THE SYSTEM SHALL CONTROL EACH CHILLER'S LEAVING CHILLED WATER SETPOINT TO EQUALIZE CHILLER LOADING.

8. THE CHILLER SEQUENCING SOFTWARE SHALL STOP A CHILLER WHEN THE SYSTEM LOAD, AS MEASURED BY FLOW AND CHILLER TEMPERATURE DIFFERENCE AND/OR PERCENT OF CHILLER DESIGN RLA APPROACHES A POINT WHERE ONE OR TWO CHILLER(S) CAN MEET THE DEMAND.

9. WHEN THE SYSTEM DETERMINES THE LAG CHILLER IS NO LONGER REQUIRED, THE CHILLER SEQUENCING SOFTWARE SHALL INITIATE THE SHUTDOWN OF THE LAG CHILLER.

1. THE SYSTEM SHALL TEMPORARILY UNLOAD THE LAG CHILLER THROUGH EITHER DEMAND LIMITING OR BY RAISING THE CHWS SETPOINT. MAINTAIN THE UNLOADED CONDITION FOR TEN MINUTES (ADJ.) BEFORE PROCEEDING.

2. STOP THE LAG CHILLER AND CONFIRM THE COMPRESSOR HAS STOPPED.3. SLOWLY CLOSE THE LAG CHILLER ISOLATION VALVE UNTIL PROVEN CLOSED. ENSURE MINIMUM FLOW IS MAINTAINED THROUGH THE LEAD

CHILLER.4. RELEASE THE TEMPORARY DEMAND LIMIT OR CHWS TEMPERATURE RESET.

10. THE SYSTEM SHALL CONTROL EACH CHILLER'S LEAVING CHILLED WATER SETPOINT TO EQUALIZE CHILLER LOADING.11. PUMP CONTROL: ONCE CHILLER START SEQUENCE IS COMPLETE, THE PUMP VFD'S SHALL MODULATE THEIR RESPECTIVE PUMPS TO MAINTAIN SYSTEM

DIFFERENTIAL PRESSURE SETPOINT. IN RESPONSE TO LOW-LOAD, THE VFD'S SHALL MODULATE THEIR RESPECTIVE PUMPS DOWN TO MINIMUM FLOW AS DETAILED IN THE CHILLER SHUT-DOWN PROCESS. MINIMUM PLANT FLOW IS SET AT 30HZ (ADJ.) OF ONE PUMP TO ENSURE CHILLER MINIMUM FLOWS.

12. BYPASS VALVE CONTROL: ONCE THE PLANT FLOW APPROACHES "PLANT MINIMUM" WITH ONE, TWO OR THREE CHILLERS OPERATING THE BYPASS VALVE SHALL MODULATE OPEN TO MAINTAIN "PLANT MINIMUM". AS BYPASS VALVE APPROACHES FULL OPEN, RESPECTIVE PRODUCTION PUMP VFDS SHALL INCREASE, IF NECESSARY TO ENSURE PLANT FLOW DOES NOT DECREASE BELOW PLANT MINIMUM.

13. CHILLED WATER PUMP FAILURE: UPON FAILURE OF ONE OF THE PRIMARY CHW PUMPS, RESET SEQUENCE TO UTILIZE REMAINING PUMPS.14. CHILLER FAILURE: UPON SENSING A CHILLER FAILURE, THE CHILLER SEQUENCING SOFTWARE SHALL ALARM AND LOCKOUT THAT CHILLER AND

IMMEDIATELY INITIATE THE START SEQUENCING FOR THE REMAINING CHILLER(S). MAINTAIN CHILLER OPERATION WITH ONE OR TWO PRODUCTION PUMPS.15. CHILLER ROTATION: AUTOMATIC ROTATION OF CHILLER OPERATION SHALL EQUALIZE CHILLER RUN TIME. ROTATION SHALL BE INITIATED BY THE

FOLLOWING OPERATOR SELECTABLE METHODS:1. REAL TIME: BASED ON DAY INTERVALS2. RUN TIME: ACTUAL CHILLER RUN TIMES3. MANUAL OR FORCED: OPERATOR INITIATED START/STOPS

16. SYSTEM SOFT START: THE CHILLER SEQUENCING SOFTWARE SHALL PROVIDE OPERATOR ADJUSTABLE CHILLED WATER TEMPERATURE RAMP RATES TO INSURE THAT THE SYSTEM WATER TEMPERATURE DOES NOT APPROACH SETPOINT TOO QUICKLY OR TOO SLOWLY AT SYSTEM START-UP. THIS PREVENTS THE UNNECESSARY OPERATION OF CHILLERS AND LIMITS SYSTEM ELECTRICAL DEMAND DURING DISTRIBUTION LOOP TEMPERATURE PULL DOWN.

1. THE MAXIMUM COOL DOWN RATE IN THE PRODUCTION LOOP SHALL NOT EXCEED 2 DEG. F. PER MINUTE (ADJ.)17. CHILLER START INTERVAL: THE CHILLER SEQUENCING SOFTWARE SHALL INCLUDE A 30 MINUTE (ADJ.) TIME INTERVAL TO DELAY THE LAG CHILLER(S) FROM

STARTING OR STOPPING FROM THE LEAD CHILLER.A. CHILLER SEQUENCING STATUS: THE FOLLOWING SEQUENCE STATUS INFORMATION SHALL BE DISPLAYED TO THE OPERATOR:

1. CHILLER ADDITION PENDING (YES/NO) (ADD CHILLER-3)2. CHILLER SUBTRACTION PENDING (YES/NO) (ADD CHILLER-3)3. CHILLER START DELAY TIME REMAINING (TIME) (ADD CHILLER-3)4. CHILLERS ON (0,1,2,3) (ADD CHILLER-3)5. SYSTEM SETPOINT (DEGREES F)

B. INDIVIDUAL CHILLER STATUS DISPLAY - THE CHILLER SEQUENCING SOFTWARE SHALL PROVIDE AN OPERATING STATUS REPORT FOR EACH CHILLER. THE DISPLAYS SHALL INCLUDE:1. CHILLER OPERATING MODE2. CHILLER LWT SETPOINT3. CHILLED WATER ENTERING AND LEAVING TEMPERATURES4. CURRENT LIMIT SETPOINT5. CHILLER LOAD IN PERCENTAGE OF CHILLER DESIGN RLA

C. DIAGNOSTIC/PROTECTION - THE CHILLER SEQUENCING SOFTWARE SHALL BE ABLE TO ALARM FROM ALL SENSED POINTS AND DIAGNOSTIC ALARMS SENSED BY THE CHILLER CONTROLLER.

D. ALARM LIMITS SHALL BE DESIGNED FOR ALL SENSED POINTS.18. CHILLER PLANT STATUS DISPLAY - THE BMS SOFTWARE SHALL PROVIDE A PLANT STATUS REPORT. THE DISPLAY SHALL INCLUDE THE FOLLOWING:

1. ON-OFF STATUS OF EACH CHILLER. (ADD CHILLER-3)2. ON-OFF STATUS AND SPEED OF EACH PUMP.3. SYSTEM DIFFERENTIAL PRESSURE AND SETPOINT.4. CHILLER FLOW.5. BYPASS VALVE POSITION.6. PLANT EWT AND LWT.7. TOTAL PLANT TONNAGE PRODUCTION. (INCLUDE NEW CHILLER-3 IN CALCULATION)

19. SYSTEM DIAGNOSTIC AND ALARM INDICATION:1. THE CHILLER UNIT CONTROL PANEL SHALL DISPLAY LOCALLY ALL THE ALARM, MONITORING, AND OPERATION CONDITIONS AS DESCRIBED IN

SPECIFICATIONS. IT SHALL ALSO SUPPLY TO THE BMS A COMMON BINARY STATUS FOR ANY OF THESE ALARM CONDITIONS.20. PUMP DISCHARGE SENSOR: PUMP DISCHARGE PRESSURE SENSORS SHALL OVERRIDE THE VFD PUMP CONTROLS TO LIMIT PRESSURE (ADJ.) AND SEND AN

ALARM TO THE OPERATORS WORKSTATION.

AIR COOLED CHILLER SCHEDULE

DESIGNATION LOCATION AREA SERVED

NOMINALCAPACITY

(TONS)

ACTUALCAPACITY

(TONS) TYPE REFRIGERANT# OF

COMPRESSORS MIN EER MIN IPLVMAXIMUMWEIGHT

EVAPORATOR CONDENSER SINGLE POINT POWER

MFG. MODEL Comments

FLOWRATE(GPM) EWT (DEG. F) LWT (DEG. F) MAX WPD

AMBIENT OATEMP

# OFCONDENSER

FANS MCA MOCP PHASE VOLTAGE

CH-3 ROOF POLICE DEPARTMENT/CITYHALL/COURTS

200 185.7 SCREW R-134a 2 8.397 13.64 13,200 lb 370 56 44 9.26 105 °F 12 417 A 500 A 3 460 V TRANE RTAC200 A, B, C, D, E

COMMENTS:A. PROVIDE MANUFACTURER FURNISHED SOUND ISOLATION PACKAGE. TO INCLUDE BOTH CONDENSER FAN SHROUDS AND COMPRESSOR SOUND MITIGATION MATERIAL .B. PROVIDE WITH 65K AMP SHORT CIRCUIT CURRENT RATING OPTION.C. ONLY TRANE RTAC200 CHILLER WILL BE ACCEPTABLE IN ORDER TO CONFORM TO THE EXISTING PLANT REQUIREMENTS AND SPACE LIMITATIONS.D. PROVIDE LOW AMBIENT AIR CONTROLS TO ALLOW CONTINUOUS OPERATION IN LOW TEMPERATURE CONDITIONS.E. PROVIDE WITH LOUVERED CONDENSER HAIL GAURD OPTION.F. SCHEDULED EER OF 8.397 IS AT OPERATING CONDITIONS. MIN EER AT AHRI CONDITIONS SHALL BE NO LESS THAN 9.76.

Revis

ion

s

No

.D

ate

Descri

pti

on

J

J

R

S

1

ELECTRICAL

ROOM

1131

EXISTINGPANEL RP1A

KEYPLAN

AREA OF WORK

PO

LIC

E D

EP

AR

TM

EN

T

CITY HALL

R

S

1

CHDP-3

(EXISTING)CH-1

(EXISTING)CH-2

CH-3

8

3

2

1

6

47 5

®

Sheet Number

Scale:

Checked By:

Drawn By:

Issued:

Project No.:

Sheet Title

3/2

8/2

019 5

:30:3

4 P

MC

:\Revi

t Loca

l\35128.0

01_M

EP

_H

ALF

F_2018_ah3530.r

vt

As indicated

POWER PLAN

E1.01

JW

SF

03/28/19

35128.001

CH

ILL

ER

PL

AN

T E

XP

AN

SIO

N

CIT

Y O

F M

ES

QU

ITE

75

7 N

GA

LL

OW

AY

AV

E,

ME

SQ

UIT

E, T

X 7

514

9

THE SEAL APPEARING ON THISDOCUMENT WAS AUTHORIZED BY

JAMES J. WOMACK, PE NO. 55291 ON3/28/19. ALTERATION OF A SEALED

DOCUMENT WITHOUT PROPERNOTIFICATION TO THE RESPONSBILE

ENGINEER IS AN OFFENSE UNDER THETEXAS ENGINEERING PRACTICE ACT.

1/4" = 1'-0"2PART PLAN - 1ST FLOOR - POWER

KEY NOTES:

1. EXISTING 1600A DISTRIBUTION PANEL CHPD WITH 65K A.I.C. 500A CIRCUIT BREAKER. (EATON L630 H) FOR NEW CIRCUIT CHPD-3

2. CONTROL PANEL AND J BOX (EXISTING)

3. 1" C WITH CONTROL WIRING. REF: DIV 23

4. J-BOX WITH 120V 20A CIRCUIT RPIA-88 AVAILABLE ON ROOF. EXTEND CIRCUIT AS NECESSARY. MAKE CONNECTION TO HEAT TRACE (DIV 23).

5. SAFETY SWITCH: 600A / 3P / 3R / NF.

6. HEATER CIRCUIT 120V, 20A, 1640W LOAD, 2 #10, #10G, 3/4"C FROM PANEL 'RPIA' ON 1ST FLOOR.

7. EXIST GFCI RECEPTICLE TO REMAIN

8. CHPD-3: 2 SETS (3 #250, #2G, 2 1/2"C)

1/4" = 1'-0"1PART PLAN - 2ND FLOOR - POWER

Revis

ion

s

No

.D

ate

Descri

pti

on