S02 - 695-22-117 Drawings Vol 2 Mechanical Sheets 17.pdf

AI

AI

AI AI

AO

DO

DI

AI

AI

AI

FM

FMDSD

DSD T H

T

DO DI

EXHAUST

AIR

OUTSIDE

AIRFLOW

UNIT

OUTSIDE

AIR

RTU CONTROLLER

TO/FROM FMCS THROUGH RTU BACNET GATEWAY:

* DUCT DIFFERENTIAL STATIC PRESSURE SET POINT ["W.C.] (ANALOG)

* DUCT STATIC PRESSURE ["W.C.]

* DISCHARGE TEMP SETPOINT ADJUST [°F] (ANALOG)

* SUPPLY AIR TEMPERATURE [°F] (ANALOG)

* BUILDING STATIC PRESSURE SETPOINT ["W.C.] (ANALOG)

* RTU ENABLE/DISABLE

* OA SETPOINT (CFM) (ANALOG)

* OA AIRFLOW (CFM) (ANALOG)

* GENERAL ALARM

* DIRTY FILTER ALARM

DUCT SMOKE DETECTOR: PROVIDED AND WIRED

BY ELECTRICAL CONTRACTOR. INSTALLED BY

MECHANICAL CONTRACTOR. INTERLOCK TO

RTU CONTROL PANEL BY CONTRACTOR IN FIELD.

DUCT MTD TEMP &

HUMIDITY SENSORS

RTU PRESSURE

BUILDING

SENSOR

DUCT

STATIC

PRESSURE

HIGH STATIC

SWITCH

SUPPLY

AIRFLOW

P

COORDINATE EXACT LOCATION

OF PRESSURE SENSOR WITH

MANUFACTURER.

RETURN

AIR

SUPPLY

AIR

BACNET INTERFACE TO

FMCS

CONTROLS PROVIDED BY PACKED EQUIPMENT MANUFACTURER:

PACKAGE ROOFTOP UNIT SYSTEM DESCRIPTION:

REFER TO SECTION 23 74 13 FOR A DESCRIPTION OF THE RTU AND THE CONTROLS PROVIDED BY THE RTU MANUFACTURER.

SUPPLY FAN CONTROL:

RTU CONTROLLER SHALL MODULATE SIGNAL TO SUPPLY MANUFACTURER INSTALLED FAN VFD AS REQUIRED TO MAINTAIN DUCT STATIC PRESSURE SETPOINT AS MEASURED BY STATIC PRESSURE

TRANSMITTER.

STATIC PRESSURE RESET:

FMCS SHALL RESET SUPPLY DUCT STATIC PRESSURE SETPOINT BELOW THE MAXIMUM SETPOINT AS REQUIRED TO MAINTAIN AT LEAST ONE SUPPLY TAB DAMPER 90% (ADJ.) OPEN. FMCS SHALL

MONITOR ALL SUPPLY TERMINAL AIR BOX POSITIONS TO RESET THE SUPPLY DUCT DIFFERENTIAL STATIC PRESSURE.

EXHAUST FAN CONTROL:

RTU CONTROLLER SHALL MONITOR BUILDING PRESSURE SIGNAL. MODULATE SIGNAL TO EXHAUST FAN VFD AS REQUIRED TO MAINTAIN +0.05" (ADJ.) W.C..

VENTILATION CONTROL:

WHENEVER THE UNIT IS IN OCCUPIED MODE THE OUTSIDE AIR DAMPER SHALL MODULATE TO MAINTAIN MINIMUM OUTSIDE AIR CFM BASED ON QUANTITY OF AIR FROM UNIT MOUNTED AIRFLOW

MEASURING STATION.

SUPPLY AIR TEMPERATURE CONTROL:

DISCHARGE AIR TEMPERATURE SHALL BE 55°F (ADJ.). WHENEVER THE SUPPLY AIR TEMPERATURE IS ABOVE SETPOINT, THE FOLLOWING SHALL OCCUR IN SEQUENCE:

• MODULATE THE HEATING WATER VALVE CLOSED.

• MODULATE OA DAMPER AS REQUIRED UNTIL SET POINT IS REACHED.

• IF SET POINT CANNOT BE MAINTAINED BY OA DAMPER CONTROL, OUTSIDE AIR DAMPER SHALL CLOSE TO MINIMUM POSITION AND THE COMPRESSORS SHALL BE ENABLED AND MFR SHALL

STAGE COMPRRESSOR CAPACITY AS REQUIRED TO MAINTAIN SET POINT.

WHENEVER THE DISCHARGE AIR TEMPERATURE IS BELOW SETPOINT, THE FOLLOWING SHALL OCCUR IN SEQUENCE:

• IF THE DISCHARGE AIR TEMPERATURE IS MORE THAN 5°F (ADJ) BELOW SETPOINT. MFR SHALL STAGE COMPRRESSORS OFF.

• MODULATE OA DAMPER AS REQUIRED UNTIL SET POINT IS REACHED.

• IF SET POINT CANNOT BE MAINTAINED BY OA DAMPER CONTROL, MODULATE HEATING WATER VALVE AS REQUIRED TO MAINTAIN SET POINT.

SEND AN ALARM TO THE CONTROLER INTERFACE [FMCS] FOR THE FOLLOWING:

• SUPPLY FAN FAULT (AIRFLOW, CURRENT OR VFD)

• EXHAUST FAN FAULT (AIRFLOW, CURRENT OR VFD)

• DIRTY FILTERS (WHEN FILTER PRESSURE DROP EXCEEDS 0.6" W.C. (ADJ.)

• IF DISCHARGE AIR TEMPERATURE IS MORE THAN 10°F (ADJ.) ABOVE OR BELOW SETPOINT.

• EMERGENCY STOP

CIRCULATION PUMP OPERATION:

WHEN OUTSIDE AIR TEMPERATURE RISES ABOVE 40°F (ADJ.) FOR 10 MINUTES (ADJ.) HEATING WATER COIL CIRCULATION PUMP SHALL OPERATE ONLY WHEN HEATING IS CALLED FOR (HEATING

WATER VALVE IS COMMANDED TO OPEN). WHEN OUTSIDE AIR TEMP DROPS BELOW 40°F (ADJ.) HEATING WATER COIL CIRCULATION PUMP SHALL OPERATE CONTINUOUSLY. ONCE ENERGIZED, HEATING WATER COIL CIRCULATION PUMP SHALL REMAIN IN OPERATION FOR MINIMUM 5 MINUTES (ADJ.) TO PREVENT SHORT CYCLING.

FMCS SHALL MODULATE HEATING WATER CONTROL VALVE AS REQUIRED TO MAINTAIN DISCHARGE AIR TEMPERATURE SET POINT.

ECONOMIZER OPERATION:

WHEN THE OUTSIDE AIR DRY BULB TEMPERATURE IS LESS THAN THE RETURN AIR DRY BULB TEMPERATURE THE FMCS SHALL ENABLE ECONOMIZER CONTROLS. WHEN OUTSIDE AIR DRY BULB

TEMPERATURE IS GREATER THAN THE RETURN AIR DRY BULB TEMPERATURE FOR 10 MINUTES THE FMCS SHALL DISABLE ECONOMIZER CONTROLS AND SHALL RETURN THE UNIT TO MINIMUM OUTSIDE

AIR MODE. ONCE ECONOMIZER CONTROLS HAVE BEEN ENABLED OR DISABLED, THE UNIT SHALL CONTINUE TO OPERATE IN THAT MODE FOR A MINIMUM OF 10 MINUTES (ADJ.) BEFORE BEING

ALLOWED TO SWITCH BACK (TO PREVENT SHORT CYCLING).

IN ECONOMIZER MODE THE FMCS SHALL MODULATE THE RETURN AND RELIEF DAMPERS AS REQUIRED TO MAINTAIN DISCHARGE AIR TEMPERATURE SETPOINT.

WHENEVER RTU IS SHUT DOWN THE RTU CONTROLLER SHALL COMMAND THE FOLLOWING TO OCCUR:

• SUPPLY FAN AND EXHAUST FAN SHALL STOP.

• OUTSIDE AIR AND EXHAUST AIR DAMPERS SHALL FULLY CLOSE. THE RETURN AIR DAMPER SHALL FULLY OPEN.

• HEATING WATER CIRCULATION PUMP AND HEATING WATER CONTROL VALVE SHALL REMAIN UNDER CONTROL OF ITS INPUT SENSOR.

• COOLING SHALL BE DISABLED.

• OUTSIDE AIR AND RELIEF AIR DAMPER SHALL REMAIN CLOSED. RETURN AIR DAMPER SHALL BE 100% OPEN

UN-OCCUPIED MODE OPERATION:

• OUTSIDE AIR AND RELIEF AIR DAMPER SHALL REMAIN CLOSED. RETURN AIR DAMPER SHALL BE 100% OPEN.

2 2

LOCATE DUCT DIFFERENTIAL STATIC PRESSURE

SENSOR NEAR MOST REMOTE TERMINAL AIR

BOX.

KEYNOTES:

1. SENSOR PROVIDED BY RTU MANUFACTURER. SENSOR FEEDER/RACEWAY AND

CONNECTION SHALL BE INSTALLED BY CONTRACTOR IN THE FIELD.

2. POINT, SENSOR AND FEEDER/RACEWAY PROVIDED BY TCC.

SUPPLY

TEMPERATURE

SENSOR

CONTROLS SEQUENCE PROVIDED BY CONTRACTOR IN FIELD:

SEQUENCE OF OPERATION:

THE T.C.C. SHALL EXTEND THE FMCS NETWORK TO THE RTU BACNET INTERFACE PER THE PROTOCOL SPECIFIED IN SECTION 23 09 00.

WHEN RTU IS INDEXED TO RUN, THE FOLLOWING SHALL OCCUR:

• WHEN THE SUPPLY FAN HAS STARTED THE INTERLOCKED EXHAUST FANS SHALL START AS SHOWN IN THE FAN INTERLOCK SCHEDULE.

BUILDING OCCUPANCY SCHEDULING:

ENABLE RTU TO RUN BASED ON THE FOLLOWING OCCUPANCY SCHEDULE WITH ALLOWANCE FOR ENERGY CODE OPTIMAL START.

• OCCUPIED MODE:

• UNOCCUPIED MODE:

CONTRACTOR SHALL FIELD INSTALL THE FOLLOWING MANUFACTURER PROVIDED EXTERNAL SENSORS AND WIRE BACK TO RTU CONTROLLER:

• DUCT STATIC PRESSURE SENSOR IN SUPPLY DUCT.

• BUILDING PRESSURE SENSOR.

• SUPPLY AIR TEMPERATURE IN SUPPLY DUCT.

ALARMS, INTERLOCKS AND SAFETIES:

THE FOLLOWING SAFETIES SHALL BE INSTALLED AND WIRED IN THE FIELD.

• HIGH STATIC SWITCH (WIRED TO UNIT ENABLE/DISABLE TO TURN FANS OFF)

• LOW STATIC SWITCH (WIRED TO UNIT ENABLE/DISABLE TO TURN FANS OFF)

• FIRE ALARM RELAY (WIRED TO UNIT ENABLE/DISABLE TO TURN FANS OFF)

EXTERNAL CONTROLS PROVIDED BY CONTROLS CONTRACTOR AND

WIRED TO FMCS:

• STATIC SWITCH

• RETURN TEMPERATURE SENSOR

• HUMIDITY SENSOR

• DUCT SMOKE DETECTOR

• DUCT SMOKE DETECTOR INTERLOCK

FAN INTERLOCK SCHEDULE

SYSTEM INTERLOCKED EXHAUST FANS REMARKS

AHU-5B-NORTH EF-0 NOTE 1

NOTES:

1. INTERLOCK EXHAUST FAN OPERATION THROUGH THE FMCS WITH RESPECTIVE AHU IN

ACCORDANCE WITH AHU SEQUENCE OF OPERATION.

MONDAY THROUGH FRIDAY 7:00AM-6:00PM (ADJ.)

MONDAY THROUGH FRIDAY 6:00PM-7:00AM (ADJ.)

SCHEDULED HOLIDAYS AND SATURDAY/SUNDAY

MFR SHALL INSTALL OUTSIDE AIR

FLOW METER TO OBTAIN

ACCURATE AIRFLOW READING

VALVE

MOD.

HWR

N.O.

CS

HWS

PUMP

STATUS

START/

STOP

HWR

TEMP

HWS

TEMP

ECONOMIZER

DAMPER

ACT

N.C.

DMPR

OPEN/

CLOSE

DMPR

FDBK

Project Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

Office of Construction and Facilities Management

U.S. Department of Veterans Affairs

B

C

D

E

F

A

B

C

D

E

F

21 4 5 6 7 8 9 10

Phase

ARCHITECT/ENGINEER OF RECORD STAMPCONSULTANT

321 4 5 6 7 8 9 10

DWG. ___ OF XX

7GAE PROJECT NO.: 221236

Sprinkler:

600 E. Michigan Avenue, Suite B

Kalamazoo, MI 49007

P: 269.927.0144 www.7GenAE.com

2850 Eisenhower Ave, Suite 310

Alexandria, VA 22314

P: 202.617.8485 www.alliance.us.com

FULLY SPRINKLERED

HVAC DIAGRAMS VA MILWAUKEE RENOVATE 111

AUDIOLOGY 5BN

5000 W NATIONAL AVE, MILWAUKEE, WI 53295

695-22-117

PROJECT DIRECTOR

September 9, 2024 KRICOT RYALIN

100%

BID DOCUMENTS

M400

2310 CROSSROADS DR

SUITE 3000

MADISON, WI 53718

P: 608.223.9600 F: 608.223.9601 www.imegcorp.com

IMEG CORP. RESERVES PROPRIETARY RIGHTS, INCLUDING COPYRIGHTS,

TO THIS DRAWING AND THE DATA SHOWN THEREON. SAID DRAWING

AND/OR DATA ARE THE EXCLUSIVE PROPERTY OF IMEG CORP. AND

SHALL NOT BE USED OR REPRODUCED FOR ANY OTHER PROJECT

WITHOUT THE EXPRESS WRITTEN APPROVAL AND PARTICIPATION OF

IMEG CORP. ©2023 IMEG CORP.

REF. SCALE IN INCHES

0 1 2 3

PROJECT #22010362.00

NO SCALE

AIR HANDLING UNIT - PACKAGED ROOFTOP UNIT WITH EXHAUST FAN

VALV

FDBK

Revisions: Date:

35% SCHEMATIC DESIGN 04/20/2023

65% DESIGN DEVELOPMENT 06/16/2023

95% CONSTRUCTION DOCUMENTS 08/30/2023

95% CONSTRUCTION DOCUMENTS RESUBMITTAL 04/12/2024

100% CONSTRUCTION DOCUMENTS 09/09/2024