Department of Administrative erv1ces

DIVISION OF PUBLIC WORKS DESIGN & CONSTRUCTION

ire ....... orrec 1ona

01 airs

42 Perimeter R __ I Concord, NH 1

1309 ~ontract B

NH DEPART ENT RRECTIONS

CIVIL ELECTRICAL

I Sheet No. I ·

Sheet List Sheet Name

G-000 COVER SHEET

G-010 LEGEND, NOTES AND ABBREVIATIONS

M-300 ENLARGED MECHANICAL ROOM PLAN

M-500 HVAC SCHEMATIC

MECHANICAL

McFarland Johnson 49 Court Street, Suite 240 Binghamton, New York, 13901

p. 607-723-9421

f. 607-723-4979

e. PPapathomopoulos@mjinc.com

DIVISION OF

PUBLIC WORKS

Design & Construction b u i I d i n g 1/,w, ~~

7 Hazen Drive PO Box 483 Room 250

Concord, New Hampshire 03301 p 603 - 271-3516 f603 - 271 - 3515

COMMISSIONER-DEPARTMENT OF ADMINISTRATIVE SERVICES

SIGNATURE DATE

t DMINISTRATOR-DIVISION OF PUBLIC WORKS

SIGNATURE DATE

COMMISSIONER-DEPARTMENT OF CORRECTIONS

SIGNATURE

REVISIONS

DATE

DESCRIPTION

DATE

DESCRIPTION

DATE

DESCRIPTION

SYMBOL

SYMBOL

SYMBOL

PROJECT NAME

DATE

New Hampshire Correctional Facility for Women (NHCFW) Boiler Heating System

Repairs

PROJECT NUMBER

81309 B

ISSUE DATE

02/06/2024

SHEET NUMBER

G-000 SHEET l OF 4

E

53 REGIONAL DRIVE

CONCORD, NEW HAMPSHIRE 03301

TEL (603) 225-2978

FAX (603) 225-0095

www.mjinc.com

PLACE STAMP HERE SHEET:

DESCRIPTION

REVISIONS

No DATE

OF

JOHN O. MORTON BUILDING

7 HAZEN DRIVE BOX 483 ROOM 250

CONCORD, NEW HAMPSHIRE 03302-0483

(603) 271-3516 FAX(603) 271-3515

DRAWN BY: SCALE: DATE:ENGINEER/ARCHITECT: DESIGNED BY: APPROVED BY: CHECKED BY:

MCFARLAND JOHNSON

STATE OF NEW HAMPSHIRE

DEPARTMENT OF ADMINISTRATIVE SERVICES

DIVISION OF PUBLIC WORKS DESIGN & CONSTRUCTION

McFarland Johnson PROJECT No:

CONTRACT:

MJ Project No: DEN PP PP PP 02/06/2024

81309 B

New Hampshire Correctional Facility for Women (NHCFW) Boiler Heating System Repairs

42 Perimeter Rd, Concord, NH 03301

NH DEPARTMENT OF CORRECTIONS

G-010

LEGEND, NOTES AND ABBREVIATIONS

2 418888.14

HW

VD

VD

VD

HWR

HWS

HWR

HWS

CONTRACTOR NOTES

WIRING AND INSTALLATION.

12. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL TEMPERATURE CONTROL DEVICES,

WHETHER SHOWN OR NOT TO PROVIDE A COMPLETE, SAFE AND DURABLE SYSTEM.

11. THE CONTRACTOR SHALL INSTALL ALL NECESSARY STIFFENERS, BRACES, STRUTS, ETC.

10. ALL DUCT SIZES, INCLUDED LINED DUCTS, ARE NET FREE INSIDE DIMENSIONS.

9. PROVIDE ALL REQUIRED DUCT AND PIPE HANGERS.

8. THE CONTRACTOR SHALL OBTAIN ALL REQUIRED PERMITS.

7. FIELD VERIFY ALL DIMENSIONS BEFORE FABRICATION.

FLOORS, WALLS, FOUNDATIONS, AND CEILINGS. PATCH AND PAINT ALL REPAIRED SURFACES TO

REQUIRED TO CONSTRUCT THE WORK AS SHOWN ON THESE DRAWINGS, INCLUDING

6. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL CUTTING AND REPAIR WORK AS

DURING PERFORMANCE OF WORK COVERED BY THIS CONTRACT.

AND ALL DAMAGES TO BUILDING SURFACES, EQUIPMENT AND FURNISHINGS CAUSED

5. THE CONTRACTOR SHALL BE RESPONSIBLE TO REPAIR TO ORIGINAL CONDITION ANY

TRADES AND OTHER CONTRACTS.

4. ALL WORK COVERED BY THIS CONTRACT SHALL BE COORDINATED WITH THE OTHER

ACCOMPLISH THE WORK AS SPECIFIED AND SHOWN ON THE DRAWINGS.

3. THE CONTRACTOR SHALL PROVIDE LABOR, MATERIALS AND SUPERVISION NECESSARY TO

TO BIDDING.

LOCATIONS, DIMENSIONS AND COUNTS AS SHOWN AND NOTED ON THE DRAWINGS PRIOR

2. THE CONTRACTOR SHALL VISIT THE JOB SITE AND VERIFY ALL CONDITIONS,

UTILITY REGULATIONS.

1. ALL WORK SHALL BE IN ACCORDANCE WITH NFPA, STATE AND LOCAL CODES AND 1. THE CONTRACTOR SHALL VISIT JOB SITE AND FAMILIARIZE

HIMSELF WITH THE CONDITIONS PRIOR TO BIDDING.

2. THE OWNER HAS THE FIRST RIGHT OF REFUSAL ON ALL EQUIPMENT

REMOVED UNDER THIS CONTRACT. CONTRACTOR TO DISPOSE OF ALL

UNWANTED ITEMS.

3. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL CUTTING WORK AS

REQUIRED TO COMPLETE THE WORK SHOWN ON THESE DRAWINGS

INCLUDING FLOORS, WALLS AND CEILING AND REPAIR OF SURFACES.

4. THE CONTRACTOR SHALL BE RESPONSIBLE FOR PROPER DISPOSAL OF

ALL DEBRIS REMOVED UNDER HIS CONTRACT.

5. ALL WORK COVERED BY THIS CONTRACT SHALL BE COORDINATED

WITH THE OWNER AND ALL OTHER TRADES TO MINIMIZE DISRUPTION

OF ROUTINE.

MATCH ADJACENT SURFACE CONDITIONS.

w R

PIPE BREAK

PIPE DROP

PIPE RISE

EXPANSION JOINT

ANCHOR

PIPE GUIDE

SIZE - SEE SPEC.)

FLANGE

END CAP

SAFTEY RELIEF VALVE

PRESSURE REDUCING VALVE

ANGLE VALVE (SECTION VIEW)

2 WAY CONTROL VALVE,

STRAINER W/BALL VALVE, HOSE BIBB & CAP

CHECK VALVE

BALANCING VALVE

SHUTOFF VALVE

TS

H

(GATE VALVE FOR STEAM)

MODULATING ACTUATOR

UNION (AS INDICATED BY PIPE

T

VAV BOX W/

SOUND

ATTENUATOR &

HEATING COIL

OPEN END

DUCT W/

1/4"x1/4" WMS

SIDEWALL

DUCT MTD.

REG./GRILLE

SA. OR EXH.

CEILING

DUCT

MTD.

GRILLE

CEILING

DUCT MTD.

DIFF/GRILLE

TAKEOFF TO

SUPPLY

DIFFUSER

DUCT

TRANSITION

ELBOW W/

TURNING

VANES

RETURN/EXHAUST DUCT DOWN

RETURN/EXHAUST DUCT UP

SPLIT TAKE-OFF

W/

BRANCH

DAMPERS

SUPPLY

STANDARD RADIUS

ELBOW

( R = W )

SUPPLY/RETURN/EXHAUS

T

SUPPLY DUCT DOWN

SUPPLY DUCT UP

BACKDRAFT DAMPER

COMBINATION SMOKE/FIRE

DAMPER

W/ACCESS DOOR

SELF-CLOSING FIRE DAMPER

W/ACCESS

DOOR

MANUAL VOLUME DAMPER

MOTORIZED DAMPER

ROOF EXHAUST FAN SHOWN ON ROOF

ROOF EXHAUST FAN SHOWN ON

FLOOR

PLAN

RETURN OR EXHAUST AIR FLOW

SUPPLY AIR FLOW

TEMPERATURE SENSOR

HUMIDITY SENSOR OR HUMDISTAT

THERMOSTATTRIPLE DUTY VALVE

OPEN BALL VALVE

CLOSED BALL VALVE

EXISTING DUCTWORK BEING REMOVED

NEW DUCTWORK

EXISTING DUCTWORK TO REMAIN

BI BINARY INPUT

BO BINARY OUTPUT

AI ANALOG INPUT

AO ANALOG OUTPUT

T

M

CT

T

WATER FLOW METER

MOTOR

CURRENT TRANSDUCER

M

VFD

H L

H

M T T

T

T

N.O. NORMALLY OPEN

N.C. NORMALLY CLOSED

HUMIDITY SENSOR

FREEZSTAT

S

SA SUPPLY AIR

RA RETURN AIR

EA EXHAUST AIR

OA OUTSIDE AIR

AIRLFOW SENSOR

MOTORIZED DAMPER

SMOKE DETECTOR

TWO-WAY CONTROL VALVE

ZONE THERMOSTAT

ZONE SENSOR

CIRCULATING PUMP

CO

CO2

OUTSIDE AIR

TEMPERATURE

SENSOR

WITH SUN SHIELD

HOT WATER COIL

FAN

DIRECT

EXPANSION

COIL

STARTER MOTOR STARTER

HOT WATER BOILER

AIR FILTER

GAS FURNACE

VARIABLE AIR

FLOW

TERMINAL DAMPER

H

OUTSIDE AIR

HUMIDITY

SENSOR

S

2-POSITION DAMPER

END SWITCH

PUSH BUTTON

TOGGLE SWITCH

NO2

T AQUASTAT

WATER

TEMPERATURE

SENSOR

AIR

TEMPERATURE

SENSOR

CARBON DIOXIDE SENSOR

CARBON MONOXIDE

SENSOR

NITROGEN DIOXIDE

SENSOR

DIFFERENTIAL

PRESSURE

SENSOR

VARIABLE

FREQUENCY

DRIVE

POINT OF CONNECTION/DISCONNECTION

EXISTING HOT WATER RETURN PIPING

EXISTING HOT WATER SUPPLY PIPING

NEW HOT WATER RETURN PIPING

NEW HOT WATER SUPPLY PIPING

SFD

BD

VD

FD

MOD

PIPING LEGEND AIR DISTRIBUTION LEGEND

VARIABLE VOLUME EXHAUST AIR TERMINAL

VARIABLE VOLUME SUPPLY AIR TERMINAL

LCP

LAT

HWS

IN

KW

HWUH

HZ

HV

HR

HWR

HW

HC

HD

HGT

HP

LOCAL CONTROL PANEL

LEAVING AIR TEMPERATURE

HOT WATER SUPPLY

INCHES

KILOWATT

HOT WATER UNIT HEATER

HERTZ

HEATING & VENTILATING UNIT

HOT WATER RETURN

HOT WATER

HOUR

HEAD

HORSEPOWER

HEIGHT

HEATING COIL

GA

GRD

GWB

H

GIV

GALV

GC

GRV

GAL

FURN

FT

FPM

FOP

FCU

FG

FCV

FD

FLRDR

FLEX

FB

FAI

FA

F

ESP

ET

EXP

EXH

EWT

ER

EF

EG

EFF

ELEC

EMER

ELEV

GAUGE

GRADE (GROUND)

GYPSUM WALL BOARD

HUMIDIFIER

GRAVITY INTAKE VENT

GRAVITY RELIEF VENT

GENERAL CONTRACTOR

GALVANIZED

GALLONS

FIREFIGHTERS OVERRIDE PANEL

FURNISHED

FEET

FEET PER MINUTE

W/O WITHOUT

WITH RESPECT TOW.R.T.

VENT

VOLUME DAMPER

WITH

WIDTH

WATER GAUGE

WIRE MESH SCREEN

VARIABLE FREQUENCY DRIVE

WET BULB TEMPERATURE

W/

WG

WMS

WB

W

VAV

VVE

VFD

V

VD

FIRE DAMPER (W/ ACCESS DOOR)

FAN COIL UNIT

FLOW CONTROL VALVE

FIBERGLASS

FLOOR DRAIN

FLEXIBLE

FRESH AIR INTAKE

FAN BOX

FREE AREA

FAN

EXTERNAL STATIC PRESSURE

ENTERING WATER TEMPERATURE

EXPANSION TANK

EXHAUST REGISTER

EXPANSION

EXHAUST

EXHAUST FAN

EXHAUST GRILLE

ELECTRICAL

EMERGENCY

ELEVATION

EFFICIENCY

TEMPERATURETEMP

TOP OF PIPE

TOP OF DUCT

TYPICAL

TRANSFER

TRANSFER GRILLE

UNIT HEATER

UNDERCUT DOOR

UH

UC

TYP

TR

TOP

TOD

TG

STANDBY POWER

STAINLESS STEEL

SUPPLY

SUPPLY REGISTER

TELEPHONE

THROW-AWAY

TEMPERATURE

THERMOSTATIC AIR VENTTAV

TEL

TA

T

SUP

STDBY

SS

SR

POUNDS PER SQUARE INCH DIFFERENTIAL

POUNDS PER SQUARE INCH ABSOLUTE

POUNDS PER SQUARE INCH GAUGE

REFRIGERANT DISCHARGE (HOT GAS)

BOILER FEED PUMPBFP

DDC

DU

DX

EAT

EA

DIA

DDCFP

DOV

DN

DIM

DIFF

DB

D

CUF

CUH

CVE

CV

CHEM

COL

CONN

CONC

CP

CONTR

CL

CLG

CO

CFM

CF

CD

CC

BLDG

BHP

BOP

BOD

BSMT

REQUIREDREQ'D

DIRECT DIGITAL CONTROL

ENTERING AIR TEMPERATURE

DIRECT DIGITAL CONTROL FIELD PANEL

DEAERATOR UNIT

DIRECT EXPANSION

EACH

DRAIN OFF VALVE

DIMENSION

DOWN

DIFFUSER

DIAMETER

CONSTANT VOLUME EXHAUST AIR TERMINAL

CONSTANT VOLUME SUPPLY AIR TERMINAL

DRY BULB TEMPERATURE

DRAIN

CABINET UNIT HEATER

CUBIC FEET

SUPPLY FAN

SMOKE DETECTOR

SUPPLY DIFFUSER

SCREEN

SCHEDULE

SQUARE

SPECIFICATIONS

SUPPLY GRILLE

SLIDE GATE DAMPER

SOUND ATTENUATOR

SQUARE FEET

SGD

SQ

SPECS

SQFT

SG

SD

SF

SDET

SCR

SCH

SA

REQUIREMENTS

RETURN FAN

REHEAT COIL

RELATIVE HUMIDITY

RETURN GRILLE

ROOM

ROOF TOP UNIT

RETURN REGISTER

RELIEF

REVOLUTIONS PER MINUTE

REFRIGERANT SUCTION

REFRIGERANT LIQUID

RS

RTU

RR

RPM

RM

RHC

RL

RH

RLF

REQ'S

RF

RG

CHEMICAL FEED

COLUMN

CONDENSATE PUMP

CONTRACTOR

CONNECTION

CONCRETE

CEILING

CENTERLINE

CLEAN-OUT

COOLING COIL

CEILING DIFFUSER

CUBIC FEET PER MINUTE

CEILING FAN

BOTTOM OF PIPE

BOTTOM OF DUCT

BRAKE HORSEPOWER

BASEMENT

BUILDING

PREHEAT COILPHC

PLUMBING

RETURN

PRESSURE REDUCING STATION

PSID

RD

RET

PSIG

PSIA

PLBG

PRS

OUTSIDE DIAMETER

OUTSIDE AIR

PUMP

OPEN ENDED DUCT

PRESSURE DROP

POUNDS PER CUBIC FOOT

PUMPED CONDENSATE

OUTSIDE AIR INTAKE

PCF

PC

PD

P

OD

OAI

OED

OA

GENERAL ABBREVIATIONS

BDT

BDP

BBD

BF

B

AS

ARCH

AAV

ATV

ATC

AVS

AD

ADL

AFF

AF

ADD'L

AP

AC

ACCU

ACV

AIR VOLUME TRAVERSE STATION

AUTOMATIC TEMPERATURE CONTROL

BOILER FEED WATER SYSTEM

BLOWDOWN TANK

BACKDRAFT DAMPER

BOILER BLOW DOWN

BOILER

AIR SEPARATOR

AUTOMATIC AIR VENT

ATMOSPHERIC VENT

ARCHITECT

AIR COOLED CONDENSING UNIT

AUTOMATIC CONTROL VALVE

ACCESS DOOR

ACOUSTICAL DUCT LINER

ABOVE FINISHED FLOOR

ACCESS PANEL

AIR FILTER

ADDITIONAL

AIR CONDITIONING

MANUAL AIR VENT

MOUNTED

MAKEUP WATER

NORMALLY OPEN

NOT IN CONTRACT

NORMALLY CLOSED

NOT APPLICABLE

NOT TO SCALE

NUMBER

NIC

NO

NTS

NO.

N/A N.C.

MTD

MAV

MU

LINEAR FEET

LOUVERED DOOR

MEZZANINE

MECHANICAL

LOUVER

MINIMUM

MANUFACTURER

MOTOR CONTROL CENTER

LEAVING WATER TEMPERATURELWT

MECH

MEZZ

MIN

MF'R

MCC

LVDR

LUVR

LF

LINEAR DIFFUSERLD

MOTOR OPERATED DAMPERMOD

HRH HYDRONIC RADIANT HEATER

MAU MAKE UP AIR UNIT

STL STEEL

POINT OF CONNECTION/DISCONNECTION

CONTROLS LEGEND

BAS BUILDING AUTOMATION SYSTEM

EXISTING PIPING BEING REMOVED

HX HEAT EXCHANGER

SNOW MELT SUPPLY AND RETURN PIPESMS/R

LOW PRESSURE CONDENSATELPC

LOW PRESSURE STEAMLPS

HPS HIGH PRESSURE STEAM

HWH HOT WATER HEATER

FTR FIN TUBE RADIATION

PROVIDED BY OTHER SECTIONPOS

GWS/R GLYCOL WATER SUPPLY AND RETURN

(E) EXISTING

CONTRACTOR REMOVAL NOTES

44 1212

ACAC

ABAB

77 1010

PROVIDE

3" HWR

4" HWS

4" HWR (E)

3/4" HWS (E)

3/4" HWR (E)

4" HWS (E)

4" HWS (E)

2" HWS (E)

3" HWS (E)

3" HWR (E)

4" HWR (E)

PROVIDE

3" HWS

2" HWS (E)

PLACE STAMP HERE SHEET:

DESCRIPTION

REVISIONS

No DATE

OF

JOHN O. MORTON BUILDING

7 HAZEN DRIVE BOX 483 ROOM 250

CONCORD, NEW HAMPSHIRE 03302-0483

(603) 271-3516 FAX(603) 271-3515

DRAWN BY: SCALE: DATE:ENGINEER/ARCHITECT: DESIGNED BY: APPROVED BY: CHECKED BY:

MCFARLAND JOHNSON

STATE OF NEW HAMPSHIRE

DEPARTMENT OF ADMINISTRATIVE SERVICES

DIVISION OF PUBLIC WORKS DESIGN & CONSTRUCTION

PROJECT No:

CONTRACT:

1/4" = 1'-0"DEN PP PP PP 02/06/2024

81309 B

New Hampshire Correctional Facility for Women (NHCFW) Boiler Heating System Repairs

42 Perimeter Rd, Concord, NH 03301

NH DEPARTMENT OF CORRECTIONS

M-300

ENLARGED MECHANICAL ROOM PLAN

3 4

SCALE: 1/4" = 1'-0"1 ENLARGED MECHANICAL EQUIPMENT ROOM PLAN

KEYED NOTES

DEMO EXISTING 4" HWS LINE AS NECESSARY AND PROVIDE A 4x4x3 TEE.

DEMO EXISTING 4" HWR LINE AS NECESSARY AND PROVIDE A 4x4x3 TEE.

DEMO EXISTING 3" HWS LINE AS NECESSARY AND PROVIDE A 3x3x3 TEE.

DEMO EXISTING 3" HWR LINE AS NECESSARY AND PROVIDE A 3x3x3 TEE.

PROVIDE 3" BALANCING VALVE AND BALANCE TO 144 GPM.

PROVIDE 3" SHUTOFF VALVE (N.C.)

SCOPE OF WORK

1.

A.

B.

C.

D.

2.

3.

EMERGENCY DOMESTIC HOT WATER (DHW) HEATING OPERATION:

PROVIDE A 3" HWS AND A 3" HWR LINE FROM THE EXISTING BUILDING HOT WATER HEATING

LOOP TO THE EXISTING DOMESTIC WATER HEATING LOOP.

PROVIDE 3" ISOLATION VALVES THAT WILL BE MANUALLY OPERATED IN THE EVENT OF AN

EMERGENCY.

PROVIDE BALNCING VALVE ON THE 3" HWR LINE.

MODIFY DDC CONTROLS AS NOTED IN THE REVISED SEQUENCE OF OPERATION ON M-500.

PROVIDE A CHEMICAL POT FEEDER AND ASSOCIATED VALVES AS SHOWN ON DETAIL 2/M-300 FOR

THE DOMESTIC HOT WATER HEATING LOOP.

PROVIDE A WATER METER FOR THE DOMESTIC WATER BOILER MAKEUP WATER LINE AND ONE FOR THE HEATING HOT WATER BOILERS MAKEUP WATER LINE. TIE WATER METER TO THE EXISTING DDC

SYSTEM AND PROGRAM ALARMS TO ALLERT MAINTENANCE STAFF OF POTENTIAL LEAKS IN THE

SYSTEM(S).

53 REGIONAL DRIVE

CONCORD, NEW HAMPSHIRE 03301

TEL (603) 225-2978

FAX (603) 225-0095

www.mjinc.com

McFarland Johnson

MJ Project No: 18888.14

B 2B

P

HC

P 1A

P 1B

AS

ET

P 2A

P 2B

TO EXISTING BUILDING LOADS

FROM EXISTING BUILDING LOADS

2" HWR (E)

HX

FR

O

M E

XI

ST

IN

G

D H

W

R

EC

IR

C

L O

O P

TO

E

XI

ST

IN

G

D

IR

C

L O

O P

VFD

VFD

VFD

VFD

3" HWR (E)

PS

3" HWS

3" HWR

DHW

SHUT OFF

VALVE N.C.

(TYP)

3" HWS (E)

P-2A GPM: 155 P-2B GPM: 155

P-1B GPM: 300

P-1A GPM: 300

B-1 MBH:

IN: 2702 @ 30 PSI

OUT: 2508

B-2 MBH:

IN: 2702 @ 30 PSI

OUT: 2508

4" HWR (E)

4" HWS (E)

3" HWS (E)3" HWR (E)

4" HWR (E)

3" HWS (E)

3" HWR (E)

1"

4" HWS (E)

4" HWS (E)

4" HWS (E)

DWH-1 MBH:

IN: 3373

BALANCING

VALVE

BALANCE

AT 144 GPM

4" HWR (E)4" HWS (E)

2" HWS (E) 2" HWR (E)

HX

FR

O

M E

XI

ST

IN

G

D

IR

C

L O

O P

TO

E

XI

ST

IN

G

D

IR

C

L O

O P

2" HWS (E)

RP

RP-4 GPM: 144RP

RP-3 GPM: 144

M

PROVIDE WATER METER ON EXISTING

DHW MAKEUP WATER LINE

53 REGIONAL DRIVE

CONCORD, NEW HAMPSHIRE 03301

TEL (603) 225-2978

FAX (603) 225-0095

www.mjinc.com

PLACE STAMP HERE SHEET:

DESCRIPTION

REVISIONS

No DATE

OF

JOHN O. MORTON BUILDING

7 HAZEN DRIVE BOX 483 ROOM 250

CONCORD, NEW HAMPSHIRE 03302-0483

(603) 271-3516 FAX(603) 271-3515

DRAWN BY: SCALE: DATE:ENGINEER/ARCHITECT: DESIGNED BY: APPROVED BY: CHECKED BY:

MCFARLAND JOHNSON

STATE OF NEW HAMPSHIRE

DEPARTMENT OF ADMINISTRATIVE SERVICES

DIVISION OF PUBLIC WORKS DESIGN & CONSTRUCTION

McFarland Johnson PROJECT No:

CONTRACT:

MJ Project No: NOT TO SCALEDEN PP PP PP 02/06/2024

81309 B

New Hampshire Correctional Facility for Women (NHCFW) Boiler Heating System Repairs

42 Perimeter Rd, Concord, NH 03301

NH DEPARTMENT OF CORRECTIONS

M-500

HVAC SCHEMATIC

4 418888.14

SCALE: NOT TO SCALE1 HEATING SYSTEM SCHEMATIC

A.

1.

2.

B.

1.

2.

3.

a.

b.

C.

1.

2.

3.

4.

D.

1.

2.

E.

1.

2.

3.

4.

5.

EXISTING HEATING SEQUENCE OF OPERATION (FOR REFERENCE):EXISTING HEATING SEQUENCE OF OPERATION (FOR REFERENCE):

GENERAL

THE EXISTING BOILER HOT WATER CONTROL SYSTEM COORDINATES THE OPERATION OF TWO FULLY MODULATING HOT WATER BOILERS AND THEIR ASSOCIATED BOILER PRIMARY CIRCULATING PUMPS IN ORDER TO MAINTAIN HOT WATER SUPPLY (HWS) TEMPERATURE AT

SETPOINT.

THE BUILDING MANAGEMENT SYSTEM (BMS) CONTROLS THE SECONDARY PUMPS, PROVIDES PLANT ENABLE/DISABLE CONTROL, HWS TEMPERATURE SETPOINT, AND OA RESET CONTROL OUTPUTS TO THE BOILER PLANT CONTROLLER. THE BMS MONITORS BOILER OPERATION

AND DISPLAYS BOILER STATUS AT THE USER'S WORKSTATION.

APPLICATION

BOILER BURNER CONTROL: WITH THE BOILER CONTROL SYSTEM BMS INTERFACE SET TO ACTIVE, THE MODULATION OF THE BOILER IS CONTROLLED THROUGH A 0-10V OR 4-20 MA DC (AS REQUIRED BY THE BOILER) BMS INPUT. THE BMS MONITORS THE HWS SYSTEM TEMPERATURE AND COMPARES IT TO THE ACTIVE SETPOINT TO ESTABLISH A TARGET BOILER FIRING RATE. IF AN INDIVIDUAL BOILER OUTLET TEMPERATURE EXCEEDS A PRE-SET MAXIMUM SETPOINT, THAT BOILER'S FIRING RATE SHALL BE AUTOMATICALLY CUT BACK BY A PID LOOP TO PREVENT A HIGH TEMPERATURE TRIP. MODULATION SIGNALS ARE ELECTRICALLY ISOLATED CHANNEL-CHANNEL AND CHANNEL-

GROUND.

HOT WATER SUPPLY (HWS) TEMPERATURE SETPOINT: WHEN THE BOILER CONTROL SYSTEM BMS INTERFACE IS SET TO (ACTIVE), THE BMS CALCULATES AN OUTSIDE AIR TEMPERATURE RESET SETPOINT. WHEN IN (INACTIVE) MODE THE OPERATOR MAY SET THE HWS

TEMPERATURE VIA THE FRONT PANEL DISPLAY.

TEMPERATURE RESET SCHEDULE:

HWS=140 DEG. F AT 0 DEG. F OUTSIDE AIR TEMPERATURE.

HWS=110 DEG F AT 60 DEG. F OUTSIDE AIR TEMPERATURE.

BOILER SEQUENCE:

THE BOILER CONTROL SYSTEM INCORPORATES A (LEAD/LAG) CASCADE CONTROL SCHEME FOR OPERATION. THE CONTROLLER UTILIZES BOTH HWS TEMPERATURE, AS SENSED AT TS-1, AND BOILER FIRING RATE PERCENT TO START AND STOP THE BOILERS AND MINIMIZE THE TOTAL NUMBER OF BOILERS IN OPERATION. THE CONTROLLER STARTS AND STOPS BOILERS WHEN THE HWS TEMPERATURE IS OUTSIDE THE

ADJUSTABLE TEMPERATURE LIMIT FOR LONGER THAN THE ADJUSTABLE TIME DELAY.

IN ORDER TO MINIMIZE HEADER TEMPERATURE DEVIATIONS THE CONTROL SYSTEM STARTS AND STOPS THE NEXT BOILER WHEN THE "LEAD" BOILER IS AT AN ADJUSTABLE FIRING RATE LIMIT FOR LONGER THAN THE ADJUSTABLE TIME DELAY. THE CONTROL SYSTEM MONITORS BOTH BOILER LOCKOUT AND LIMIT CIRCUITS TO AUTOMATICALLY SKIP OVER BOILERS THAT ARE POWERED DOWN FOR MAINTENANCE, TRIPPED OR

OTHERWISE WILL NOT START.

THE LEAD BOILER EITHER AUTOMATICALLY ROTATES EVERY 7 DAYS OR IS MANUALLY SELECTED BY THE OPERATOR.

THE BOILER RUNS AT LOW FIRE FOR WARM-UP FOR A PRESET LOW FIRE HOLD TIME. THE CONTROL SYSTEM REDUCES THE FIRING RATE TO A

MINIMUM BEFORE STOPPING A BOILER TO PREVENT ACCUMULATION OF FUEL IN THE FURNACE.

BOILER PRIMARY PUMP SEQUENCE: (P-2A, P-2B):

THE BOILER CONTROL SYSTEM INCLUDES INDEPENDENTLY OPERATED PRIMARY WATER PUMP CONTROL. ON A CALL FOR HEAT, THE BOILER CONTROL SYSTEM CONFIRMS GAS PRESSURE AT GAS HIGH AND LOW PRESSURE SWITCHES, AND SENDS A SIGNAL TO THE ASSOCIATED CIRCULATING PUMP TO START. FLOW IS PROVEN AT THE FLOW SWITCH PRIOR TO BOILER FIRING. PRIMARY PUMPS SHALL OPERATE

WHENEVER THE ASSOCIATED BOILER IS FIRING.

PUMP SPEED IS MODULATED FROM A 0-10V SYSTEM OUTPUT TO MAINTAIN A MIMINUM TEMPERATURE DIFFERENCE ACROSS THE HEAT EXCHANGER. THE SYSTEM MUST KEEP AT LEAST ONE PUMP RUNNING TO ENSURE WATER IS ALWAYS MOVING PAST THE HEADER TEMPERATURE SENSOR. THERE ARE AVAILABLE SEQUENCES TO WARM UP COLD BOILERS, AND ADJUSTABLE COOL DOWN PERIOD AFTER THE BOILER HAS STOPPED. THE PUMP STOPS IMMEDIATELY IF ANY TRIPS OCCUR DURING PRE-PURGE, PILOT, OR MAIN FLAME TRIAL FOR

IGNITION.

SECONDARY PUMP CONTROL (P-1A & 1B)

THE LEAD SECONDARY CIRCULATING PUMP RUNS CONTINUOUSLY WHEN THE HEATING PLANT IS ENABLED. A REMOTE DIFFERENTIAL PRESSURE TRANSMITTER IS CONNECTED TO THE SUPPLY AND RETURN LINES. PUMP VFD MODULATES AS REQUIRED TO MAINTAIN SYSTEM

DIFFERENTIAL PRESSURE AS 2-WAY VALVES OPEN AND CLOSE.

IF THE LEAD PUMP CANNOT MAINTAIN SECONDARY SYSTEM PRESSURE DIFFERENTIAL, IT MODULATES OFF AND BOTH THE LEAD AND LAG

PUMPS MODULATE ON SIMULTANEOUSLY TO MAINTAIN SYSTEM DP.

IF BOTH PUMPS ARE AT MINIMUM VFD SPEED AND THE SYSTEM DP IS ABOVE SETPOINT, THE LAG PUMP IS DE-ENERGIZED AND THE LEAD

PUMP IS MODULATED TO MAINTAIN SETPOINT.

THE SCHEDULE AUTOMATICALLY ROTATES THE LEAD/LAG PUMPS.

THE PUMPS ARE MONITORED AND ALARMED IF ONE OF THEM FAILS. IF THE LEAD PUMP FAILS, THE LAG PUMP IS ENERGIZED.

A.

1.

2.

B.

1.

2.

3.

4.

EMERGENCY DOMESTIC WATER HEATING OPERATION:

GENERAL:

IN THE EVENT OF DOMESTIC HOT WATER FAILURE THE MAINTENANCE STAFF SHALL BE ABLE TO MANUALY ENABLE AN EMERGENCY DOMESTIC HOT WATER MODE THROUGH THE EXSITING BUILDING MANAGEMENT SYSTEM (BMS).

CONTRACTOR SHALL PROVIDE PROGRAMING AND CONTROL DEVICES NECESSARY TO IMPLEMENT THE SEQUENCE

DESCRIBED HEREIN.

EMERGENCY DOMESTIC HOT WATER (DHW) SEQUENCE:

WHEN THE EMERGENCY DHW SEQUENCE IS ACTIVATED, THE BMS SHALL ENABLE BOTH SECONDARY LOOP PUMPS (P-1A & P-1B).

THE LEAD PUMP SHALL RUN CONTINUOUSLY AND THE PUMP VFD SHALL MODULATE THE PUMP TO MAINTAIN THE

DIFFERENTIAL PRESSURE (DP) SETPOINT.

IF THE PUMP IS UNABLE TO MAINTAIN THE SETPOINT, BOTH PUMPS SHALL BE STARTED AND THEIR SPEED WILL MODULATE VIA THEIR RESPECTIVE VFDs. BOTH PUMPS SHALL RUN AT THE SAME SPEED.

IF BOTH PUMPS ARE AT MINIMUM VFD SPEED AND THE SYSTEM DP IS ABOVE SETPOINT, THE LAG PUMP IS DE-ENERGIZED

AND THE LEAD PUMP IS MODULATED TO MAINTAIN SETPOINT.