M-005 - MECHANICAL - SCHEDULES.pdf

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MIXING SECTION

PRE-FILTER (MERV 8)

COOLING COIL

HEATING COIL

SUPPLY FAN

FINAL FILTER (MERV 17)

SA

RA

OA

PROVIDE 6" ALUMINUM I-BEAMS FOR SUPPORT

CM

CM

TO FIRE

ALARM

SYSTEM

SUPPLY

BAS CONTROL CABINET

OUTSIDE AIR DUCT

AIR HANDLING UNIT CONTROL SCHEMATIC

HS

DP

TS

COOLING

COILFILTER SUPPLY FAN

PRE-

NC

TS-3

L H

DP-1

L

INLET (TYP.)

H

V-2B

DP

FILTER

FINAL

L H

DP-2

SPLL

FLOW SENSOR

ON EACH FAN

CHILLED

WATER

CONTROL

VALVE

HSTS

AIR

BLENDER

TS

HUMIDIFIER

HUMIDIFIER

CONTROL

VALVE

TS

FREEZESTAT

SEQUENCE OF OPERATIONS

AIR HANDLING EQUIPMENT

A. CONSTANT AIR VOLUME AIR HANDLING UNIT - AHU-16 SEQUENCE OF OPERATION

1. THE AHU WILL START ON COMMAND FROM THE BAS, WHEN THE HOA SWITCH IS IN THE

"AUTO" MODE. THE AHU MAY ALSO BE STARTED LOCALLY WHEN THE HOA SWITCH IS

PLACED IN THE "HAND MODE".

2. THE AHU SHALL STOP WHEN COMMANDED BY THE BAS, OR WHEN THE HOA SWITCH IS

PLACED IN "OFF". THE UNIT SHALL SHUT DOWN BY FIRST COMMANDING OFF THE FAN

ECM, WHEN THE FAN IS PROVEN OFF (BY THE CT INPUT) THE UNIT SMOKE DAMPERS

SHALL BE CLOSED, AFTER AN ADJUSTABLE TIME DELAY.

3. THE AHU WILL STOP (FAN OFF) AND AN ALARM BE ROUTED TO THE OPERATORS

WORKSTATION WHEN ANY OF THE FOLLOWING CONDITIONS OCCUR:

a. IF EMERGENCY STOP SWITCH IS IN "PUSHED" POSITION, THEN THE SWITCH MUST BE

MANUALLY "PULLED" IN ORDER TO RESTART AHU. RECONNECT TO THE EXISTING

ESS, IF AVAILABLE.

b. IF THE VAPOR TENSION LOW LIMIT THERMOSTAT ("FREEZESTAT") SENSES A

TEMPERATURE BELOW 35 DEGREES (SHALL REQUIRE A MANUAL RESET)

c. SMOKE MODE - IF THE SMOKE DETECTORS (FURNISHED BY DIVISION 28) INSTALLED

IN THE SUPPLY AIR STREAMS DETECT SMOKE OR A SPACE DETECTOR DETECTS

SMOKE. THE UNIT SHALL BE SHUTDOWN. UNIT SHALL RESTART WHEN THE ALARM

CLEARS.

4. DISCHARGE CONTROL

a. THE DISCHARGE AIR TEMPERATURE SENSOR IS LOCATED AT THE UNIT'S

DISCHARGE PLENUM. CONTROL DISCHARGE AIR TEMPERATURE TO 52 DEGREES F

(ADJUSTABLE), BY MODULATING THE COOLING COIL CONTROL VALVE.

b. AHU COOLING COIL SHALL BE CONTROLLED AS FOLLOWS:

UPON A RISE IN THE SUPPLY AIR TEMPERATURE, THE CONTROL VALVE SHALL BE

MODULATED TOWARD ITS FULL-OPEN POSITION. UPON A FALL IN THE SUPPLY AIR

TEMPERATURE THE CONTROL VALVE SHALL BE MODULATED TOWARDS ITS CLOSED

POSITION. WHEN THE AIR HANDLING UNIT IS SHUTDOWN THE CONTROL VALVE

SHALL CLOSE.

AHU HEATING COIL SHALL BE CONTROLLED AS FOLLOWS:

• UPON FALL IN MIXED AIR TEMPERATURE BELOW 50°F, THE CONTORL VAVLE ON

HEATING COIL SHALL MODULATE TOWARD FULL OPEN POSITION TO MAINTAIN

32°F DISCHARGE AIR TEMPERATURE.

• DEHUMIDIFICATION MODE: UPON CALL FOR HIGH HUMIDITY IN RETURN DUCT

MOUNTED HUMIDITY SENSOR, COOLING COIL SHALL OPERATRE TO FULL OPEN

POSITION AND REHEAT VALVE SHALL MODULATE TO MAINTAIN 52°F DISCHARGE

TEMPERATURE.

• IF WALL THERMOSTAT CALLS FOR HEATING

5. SUPPLY FAN CONTROL

a. MAINTAIN THE SUPPLY AIR DUCT STATIC PRESSURE SENSOR WITH THE LOWEST

READING AT SET POINT. A STATIC PRESSURE TRANSMITTER SHALL BE LOCATED 2/3

DOWN THE LONGEST DUCT. RECONNECT EXISTING.

b. IF THE STATIC PRESSURE SENSOR BECOMES UNRELIABLE, THE CONTROLLER WILL

COMMAND THE SUPPLY FAN VFD TO ITS MINIMUM SPEED AND AN ALARM SHALL BE

ROUTED TO THE OPERATOR'S WORKSTATION.

RESET THE DUCT STATIC PRESSURE SENSOR TO KEEP AT LEAST ONE VAV BOX SUPPLY AIR

DAMPER AT 95% OPEN.

6. HUMIDIFIER CONTROL

a. THE HUMIDIFIER SHALL ONLY BE ENABLED WHEN THE AHU AIRFLOW IS PROVEN.

CONTROL THE HUMIDIFIER BASED ON INPUT FROM A RETURN AIR HUMIDITY SENSOR

WITH AN ADJUSTABLE SETPOINT. INPUT FROM A DISCHARGE HUMIDITY SENSOR

SHALL BE USED TO REDUCE HUMIDIFIER OUTPUT TO PREVENT AIR SATURATION.

HUMIDIFIER CONTROL VALVE SHALL MODULATE TO MAINTAIN SET

POINT.(CUSTOMER ADJUSTABLE).

MANUFACTURER

SERVES

FILTER PRESSURE DROP (INWG) (CLEAN)

FILTER AREA (SQUARE FEET)

FILTER MINIMUM EFFICIENCY

FILTER TYPE

REMARKS:

LOCATION

SYSTEM NO.

REMARKS: BASED ON 180oF EWT AND 160oF LWT.

REMARKS:

REMARKS: FAN SHALL BE PLENUM TYPE.

SQ. FT. FACE AREA MIN.

SENSIBLE LOAD (MBH)

E.A.T. D.B./W.B. (°F) L.A.T. D.B./W.B. (°F)

FINS PER INCH MIN.

SQ. FT. FACE AREA MAX.

FACE VELOCITY MAX.

HEATING CAPACITY (MBH)

L.A.T. D.B. °F E.A.T. D.B. °F

TYPE COIL

TOTAL CFM

ROWS MIN.

TYPE COIL

RPM APPROX.

TYPE DRIVE

HP MIN/VOLT/PH

TOTAL LOAD (MBH)

TOTAL CFM

TOTAL CFM (CFM PER FAN)

EXTERNAL STATIC PRESSURE (IN W.G.)

SYSTEM TYPE

OUTSIDE AIR CFM (MINIMUM/ECONOMIZER)

MODEL NUMBER

ELECTRICAL CHARACTERISTICS

DAIKIN

CONSTANT VOLUME

CATH LAB 2

AHU-16

400/NA

ECM MOTOR

2,600 2.0

5.5

80/67 54.4/53.7

CHILLED WATER

72.6

HOT WATER

92.8

MERV 8

6.3 FT2

0.18 "

2,600

PLEATED

2,600

CAC006GBAM

460V/3PH

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C O

IL

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IL

PR

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MODULAR AIR HANDLING UNIT SCHEDULE GENERAL NOTES:

1.

2.

FILTERS SHALL BE PROVIDED BY THE UNIT

MANUFACTURER. ONE SET OF NEW FILTERS

SHALL BE INSTALLED IN EACH FILTER BANK

WHEN BUILDING IS TURNED OVER TO OWNER

AND ONE COMPLETE SET SHALL BE PROVIDED

FOR OWNER'S STOCK.

3.

REFER TO UNIT PLANS FOR ARRANGEMENT OF

UNITS, ACCESS DOORS, ETC.

REFER TO SPECIFICATIONS FOR SPECIFIC

REQUIREMENTS FOR ACCESSORIES AND DETAILS

OF CONSTRUCTION FOR THE AIR HANDLING

UNIT.

4.

5.

6.

UNIT WILL BE PROVIDED WITH DOUBLE WALL

CONSTRUCTION.

UNIT WILL BE PROVIDED WITH STAINLESS STEEL

DRAIN PANS.

REMARKS:

VIBRATION ISOLATORS (FANS)

DISCHARGE AIR PLENUM W/AD

MIXING SECTION W/AD

YES

YES

YES

AC

C

ES

S.

REMARKS:

PREFILTER MIN. EFF.

FINAL FILTER MIN. EFF.

FINAL FILTER TYPE

FINAL FILTER (SF)

MERV 17 (99.97%)

HEPA

6.0 FT2

MERV 8

-FI

N

AL

F

IL

TE

R

FLUID FLOW RATE (GPM) 14.2

1.0MAX WATER P.D. (FT.)

FILTERS SHALL BE SEALED INTO A METAL

HEADER WITH A GASKET INSTALLED ON THE

METAL HEADER. FILTERS SHALL BE TESTED

IN ACCORDANCE WITH ANSI/ASHRAE

STANDARD 52.2.

AA237A

4.04

TOTAL STATIC

6.27".

HEATING

COIL

ECM

CONTROLS NOTES:

1. ALL CONTROLS SHALL BE AN EXTENSION OF THE EXISTING SIEMENS CONTROLS SYSTEM.

UPDATE GRAPHICS FOR ALL ADDED EQUIPMENT, DEVICES, TERMINAL UNITS, SENSORS,

ETC.

2. CONTACT SIEMENS REPRESENTATIVE ED REAMER (803)765-9070 FOR INFORMATION AND

DETAILS TO CONNECT INTO VAMC CHARLESTON BAS.

3. CMI TO UPDATE CHARLESTON BAS SYTEM TO REMOVE ANY OLD DEVICES, INSTALL NEW

DEVICES AND UPDATE GRAPHICS.

TS HS

V-2B

HEATING

WATER

CONTROL

VALVE

NC

TO FIRE

ALARM

SYSTEM, SHUT

DOWN

CONTACT

SD

SD-1

1NTS

AIRFLOW SHALL BE BALANCED TO 1900 CFM

FOR AIRFLOW DISTRIBUTION

7.

M

OUTSIDE AIR

DAMPER

M

RETURN AIR

DAMPER

5838 Monroe Road, Suite 100 Charlotte, NC 28212

704 531 3000 Firm License Number: F-0674

Project No. 4415

Charlotte Engineers, LLP

Project Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

100% - CONSTRUCTION

DOCUMENTS

Office of Construction and Facilities Management

U.S. Department of Veterans Affairs

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21 4 5 6 7 8 9 10

PhaseARCHITECT GMK Associates, Inc.

1201 Main Street, Suite 2100 Columbia, SC 29201 803-256-0000 Megan C. Day, AIA

STAMPPROGRAM MANAGER

321 4 5 6 7 8 9 10

Odell International 129 Fast Lane, Suite 200 Mooresville, NC 28117 704-401-2040 C. Harmon Reed, Jr. AIA

CONSULTANT

Charlotte Engineers 5838 Monroe Road Charlotte, NC 28212 704-531-3000 Michael Eaves

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M-005

MECHANICAL - SCHEDULES CATH LAB SITE PREP at

RALPH JOHNSON VAMC

109 BEE STREET CHARLESTON, SC

534-CSI-555

MAY 08, 2020 GAT ESM

1/4" = 1'-0"2 DETAILS-AHU-16

Revisions: Date:

ADDENDUM 2 08/12/2020