Drawing - 13.19_M701 - MECHANICAL CONTROLS.pdf
PDF 346 KB Posted
- Attached to
- Z1DA--Modernize Building 22 506-21-102 Federal contract opportunity
- Solicitation number
- 36C25023B0005
About this file
This document contains a pre-solicitation notice and related federal contract opportunity announcement for the modernization of Building 22 at the Ann Arbor Veterans Affairs Medical Center. The Department of Veterans Affairs intends to issue an invitation for bid on or around November 30th, 2022 for construction services with a magnitude of cost between $5-10 million. The project involves furnishing all labor, materials, equipment and supervision to complete modernization in accordance with provided drawings and specifications. The work is to be performed during normal business hours excluding federal holidays. The NAICS code is 236220 and it is a 100% set-aside for qualified Service-Disabled Veteran Owned Small Businesses. The eventual contract will be a firm fixed price award made within 120 days of bid opening. Interested parties should monitor the Contract Opportunities website for solicitation details and amendments on or after November 30th.
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Text version
VSMC
See Location on Floor Plans
H
L
AI - Supply Air Static Pressure
SA
BI - High Static Shutdown
H L
AI - Supply Air Humidity
H L
AI - MERV 14 Prefilter Differential Pressure
AI - Preheat Coil Leaving Air Temp
BO - Preheating ON/OFF Control Valve
MPR
MPS
STM
IFB
OA
AI - Supply Air Temp
SF
AO - Cooling Valve
CHS
CHR
CHW
BO - Supply Fan Start/Stop
BI - Supply Fan Status
AO - Supply Fan VSMC Speed
BI - Supply Fan VSMC Fault
STM
H L
AI - MERV 7 Prefilter Differential Pressure
BO - Outside Air Damper
BI - Freezestat
30 PSIG STM
ZC
PDS PDS
AO - Humidifier Control Valve
BO - Humidifier Isolation Valve
TT TSL
NC
ZC ZC
ZC
ZC
AI - Cooling Coil Leaving Air Temp
TT
IT
MT TT
HPS
SPS
AO - IFB Damper ZC
AI - Outside Air Temperature
TT
AI - Supply Airflow
TT
AI - Cooling Coil Leaving
Water Temperature
SD
BI - Supply Air Smoke Detector
ZC
NC
BO - Smoke Damper BI - LOW Static Shutdown
L H
LPS
AIR HANDLING UNIT SEQUENCE OF OPERATION: 22-AHU-2
GENERAL
THE AIR HANDLING UNIT SHALL BE CONTROLLED WITH DIRECT DIGITAL CONTROL ACCORDING TO THE FOLLOWING
SEQUENCES. AIR HANDLING UNIT AND EXHAUST FANS SHALL RUN CONTINUOUS.
H-O-A SWITCH SHALL BE KEPT IN THE "AUTO" POSITION. "HAND" AND "OFF" POSITIONS SHALL BE USED ONLY FOR MAINTENANCE. WHEN THE UNIT IS "OFF", THE OUTSIDE AIR DAMPER SHALL BE FULLY CLOSED. WHEN THE UNIT IS
"ON" THE OUTSIDE AIR DAMPER SHALL BE FULLY OPEN.
INTERLOCK THE OPERATION OF 22-EF-2, 22-EF-4, 22-EF-5, AND 22-EF-6 WITH 22-AHU-2.
ALL SETPOINTS SPECIFIED IN THIS SEQUENCE SHALL BE ADJUSTABLE.
FAN OPERATION
THE SUPPLY FANS ARE PROVIDED WITH VARIABLE SPEED MOTOR CONTROLLERS (VSMC). THE SPEED OF ALL SUPPLY FANS (4) IN ARRAY SHALL RAMP UP AND DOWN TOGETHER TO MAINTAIN 1.2" (ADJUSTABLE) OF STATIC PRESSURE AT THE SUPPLY AIR STATIC PRESSURE SENSOR. AIRFLOW SHALL BE TRACKED AT EACH FAN AND INDICATED ON BMS.
FAULT OR FAILURE OF ONE FAN SHALL SEND ALARM TO BAS AND VSMC SHALL STOP FAN. THE REMAINDER FANS SHALL CONTINUE TO RAMP UP AND DOWN TOGETHER TO MAINTAIN THE STATIC PRESSURE SET POINT. ONCE FAILED FAN IS REPAIRED THE START UP OF THE FAN SHALL BE TO MINIMUM SPEEED ON VSMC AND OTHER FANS SHALL RETURN TO MINIMUM SPEED. ONCE MINIMUM SPEED IS ACIEVED, ALL FANS SHALL THEN BEGIN TO RAMP UP AND
DOWN TO MAINTAIN STATIC PRESSURE SET POINT.
THE HIGH STATIC SHUTDOWN SENSOR SHALL PREVENT THE SUPPLY FANS FROM DEVELOPING OVER 4" OF STATIC PRESSURE. IF STATIC PRESSURE EXCEEDS 4", THE SUPPLY FANS SHALL STOP AND THE UNIT SHALL BE SHUT DOWN.
THE HIGH STATIC SHUTDOWN SENSOR WILL REQUIRE MANUAL RESET AT THE DEVICE.
THE LOW STATIC SHUTDOWN SENSOR SHALL PREVENT THE SUPPLY FAN FROM DEVELOPING UNDER -2" OF STATIC ON THE INLET SIDE OF THE FAN. IF STATIC PRESSURE FALLS BELOW -2" OF STATIC, THE SUPPLY FAN STOPS AND THE UNIT SHALL BE SHUT DOWN. THE LOW STATIC SHUTDOWN SENSOR WILL REQUIRED A MANUAL RESET AT THE
DEVICE.
TEMPERATURE CONTROL
THE AIR HANDLING UNIT SHALL ENTER "COOLING MODE" WHENEVER THE OUTDOOR AIR TEMPERATURE IS ABOVE 50
DEG F AND "HEATING MODE" WHENEVER THE OUTDOOR AIR TEMPERATURE IS BELOW 50 DEG F.
IN COOLING MODE, MODULATE THE COOLING VALVE TO MAINTAIN THE COOLING COIL LEAVING AIR TEMPERATURE SETPOINT, 50 DEG F. THE PREHEATING VALVE AND HUMIDIFIER ISOLATION VALVE SHALL BE CLOSED.
IN HEATING MODE, THE PREHEATING ON/OFF CONTROL VALVE SHALL OPEN. THE IFB DAMPER SHALL BE OPEN TO THE BYPASS AND SHALL MODULATE CLOSED TO MAINTAIN THE COOLING COIL LEAVING AIR TEMPERATURE SETPOINT, 50 DEG F. THE COOLING VALVE SHALL BE CLOSED AND THE HUMIDIFIER ISOLATION VALVE SHALL BE OPEN. IF COOLING COIL LEAVING AIR TEMPERATURE SENSOR INDICATES 5 DEG F ABOVE THE SETPOINT THEN CLOSE
PREHEAT CONTROL VALVE UNTIL SENSOR READS 1 DEG F BELOW SETPOINT.
A DISCHARGE AIR TEMPERATURE RESET ROUTINE SHALL START 5 MINUTES AFTER THE DISCHARGE AIR TEMPERATURE ACHIEVES INITIAL SETPOINT OF 50 DEG F. WHEN ANY ROOM THERMOSTAT IS BELOW 72 DEG F THE SEQUENCE WILL INCREASE THE DISCHARGE AIR TEMPERATURE SET POINT BY 1°F EVERY 5 MINUTES. THE ROUTINE SHALL END WHEN DISCHARGE AIR TEMPERATURE ACHIEVES 60°F OR ALL THERMOSTATS ACHIEVE SETPOINT. WHEN A ROOM THERMOSTAT IS HIGHER THAN SETPOINT THE RESET ROUTINE SHALL STOP. WHEN TWO OR MORE ROOM THERMOSTATS IS HIGHER THAN SETPOINT AND VAV BOX IS FULL OPEN THE OPPOSITE OCCURES WITH THE DISCHARGE AIR TEMPERATURE SET POINT DECREASING BY 1°F EVERY 5 MINUTES UNIT ALL THERMOSTATS ARE AT
SETPOINT OR THE DISCHARGE AIR TEMPERATURE ACHIEVES 50 DEG F.
HUMIDITY CONTROL
THE AIR HANDLING UNIT SHALL ENTER "HUMIDIFICATION MODE" WHENEVER THE AIR HANDLING UNIT IS IN HEATING
MODE AND THE EXHAUST AIR HUMIDITY IS BELOW 30%.
IN HUMIDIFICATION MODE, OPEN THE HUMIDIFIER CONTROL VALVE UNTIL THE EXHAUST AIR HUMIDITY IS ABOVE 35%, THEN CLOSE THE HUMIDIFIER CONTROL VALVE.
ALARMS
WHEN THE PREHEAT COIL LEAVING AIR TEMPERATURE IS BELOW 40 DEG F, CLOSE THE COOLING VALVE, OPEN THE PREHEATING VALVE AND SEND AN ALARM TO THE OPERATOR WORKSTATION. IF THE FREEZESTAT SENSES A TEMPERATURE BELOW 35 DEG F, SHUT DOWN THE UNIT. THE FREEZESTAT WILL REQUIRE MANUAL RESET AT THE
DEVICE.
SEND ALARM TO THE OPERATOR WORKSTATION UPON FAILURE OF THE VSMC FOR THE SUPPLY FAN. THE SUPPLY FAN SHALL BE STARTED/STOPPED MANUALLY AT THE DIGITAL CONTROL PANEL OR THE STARTER BY-PASS. THE FAN
SHALL OPERATE AT CONSANT SPEED.
SEND ALARM TO THE OPERATOR WORKSTATION WHEN EITHER THE MERV 7 OR MERV 14 PREFILTER DIFFERENTIAL PRESSURE SENSOR READS A HIGHER DIFFERENTIAL PRESSURE THAN THE CHANGEOVER DIFFERENTIAL PRESSURE
DETERMINED BY THE FILTER MANUFACTURER.
IF COOLING MODE IS NOT ENABLED, SEND ALARM TO THE OPERATOR WORKSTATION IF THE SUPPLY AIR HUMIDITY IS
ABOVE 90% AND CLOSE THE HUMIDIFIER ISOLATION VALVE.
WHEN PRODUCTS OF COMBUSTION ARE SENSED BY THE SUPPLY AIR SMOKE DETECTOR, CLOSE THE SMOKE DAMPER, DE-ENERGIZE THE SUPPLY FAN AND SHUT DOWN THE AIR HANDLING UNIT. SEND AN ALARM TO THE
OPERATOR WORKSTATION.
CONTROLS GENERAL NOTES
1. POINTS SHOWN ARE INTENDED AS AN AID TO THE CONTRACTOR INDICATING THE MINIMUM POINTS REQUIRED FOR CONTROL AND MONITORING. ALL INPUT AND OUTPUT POINTS, AND THEIR REQUIRED INTERFACE AND ACCESSORY HARDWARE, SHALL BE PROVIDED FOR A COMPLETE AND FUNCTION CONTROL SYSTEM. IF ADDITIONAL POINTS ARE REQUIRED TO ACCOMPLISH THE SEQUENCES OF CONTROL SPECIFIED, THESE POINTS, ALONG WITH ADDITIONAL DIRECT DIGITAL CONTROL PANEL(S) (IF REQUIRED), SHALL ALSO BE PROVIDED.
2. POWER SOURCE FOR ALL CONTROLS ASSOCIATED WITH CRITICAL SPACES SHALL BE THE "CRITICAL" BRANCH OF THE EMERGENCY POWER SYSTEM.
3. DIVISION 26 SCOPE OF WORK INCLUDES A POWER SOURCE TO THE MOTOR STARTERS. ALL HVAC POWER SOURCES REQUIRED BEYOND THESE STARTERS OR BEYOND SOURCES EXPLICITLY SHOWN ON THE DIVISION 26 DRAWINGS, SHALL BE PROVIDED UNDER THE TEMPERATURE CONTROLS
WORK.
4. ALL SETPOINTS SHALL HAVE AN ADJUSTABLE TOLERANCE OF ± .5°F TO PREVENT HUNTING.
VSMC
See Location on Floor Plans
H
L
AI - Supply Air Static Pressure
SA
H LH L
AI - MERV 14 Prefilter Differential Pressure
AI - Preheat Coil Leaving Air Temp
BO - Preheating ON/OFF Control Valve
MPR
MPS
STM
IFB
OA
SF
AO - Cooling Valve
CHS
CHR
CHW
BO - Supply Fan Start/Stop
BI - Supply Fan Status
AO - Supply Fan VSMC Speed
BI - Supply Fan VSMC Fault
H L
AI - MERV 7 Prefilter Differential Pressure
BO - Outside Air Damper
BI - Freezestat
30 PSIG STM
ZC
PDS PDS
TT TSL
NC
ZC ZC
AI - Cooling Coil Leaving Air Temperature
TT
IT
TT
HPS
SPS
AO - IFB Damper ZC
AI - Mixed Air Temperature
TT
AI - Supply Airflow
RAREA
BO - Relief Air Damper
ZC
NC
MT
RF
VSMC
BO - Return Fan Start/Stop
AO - Return Fan VSMC Speed
BI - Return Fan VSMC Fault
IT
BO - Mixed Air Damper
ZC NO
SD
AI - Return Air Humidity
TT
BI - Return Fan Status
AI - Return Air Temp
TT
AI - Cooling Coil Leaving
Water Temperature
FT
AI - Cooling Coil Chilled
Water Flow
STM
AO - Humidifier Control Valve
BO - Humidifier Isolation Valve
ZC
ZC
MT
BI - High Static Shutdown
AI - Supply Air Temp
BI - Supply Air Smoke Detector
AI - Supply Air Humidity
PDS
Indoor Outdoor
AI - Building Differential Pressure
AI - Outside Air Flow
FT
SPS
AI - Return Plenum Static Pressure Sensor
AI - Outside Air Temp
TTMT
AI - Outside Air Humidity
AIR HANDLING UNIT SEQUENCE OF OPERATION: 22-AHU-3
GENERAL
THE AIR HANDLING UNIT SHALL BE CONTROLLED WITH DIRECT DIGITAL CONTROL ACCORDING TO THE FOLLOWING
SEQUENCES.
AIR HANDLING UNIT SHALL RUN ON AN OCCUPIED/UNOCCUPIED SCHEDULE. COORDINATE SCHEDULE WITH COR. THE
OUTSIDE AIR AND RELIEF AIR DAMPERS SHALL BE CLOSED DURING UNOCCUPIED MODE.
H-O-A SWITCH SHALL BE KEPT IN THE "AUTO" POSITION. "HAND" AND "OFF" POSITIONS SHALL BE USED ONLY FOR MAINTENANCE. WHEN THE UNIT IS "OFF", THE OUTSIDE AIR DAMPER AND RELIEF AIR DAMPER SHALL BE FULLY CLOSED. WHEN THE UNIT IS "ON" THE OUTSIDE AIR DAMPER AND RELIEF AIR DAMPER SHALL BE CONTROLLED TO
THE SEQUENCE BELOW.
ALL SETPOINTS SPECIFIED IN THIS SEQUENCE SHALL BE ADJUSTABLE.
FAN OPERATION
THE SUPPLY FAN VARIABLE SPEED MOTOR CONTROLLER (VSMC) SHALL CONTROL THE SUPPLY FAN SPEED TO MAINTAIN 1.2" (ADJUSTABLE) OF STATIC PRESSURE AT THE SUPPLY AIR STATIC PRESSURE SENSOR.
ENABLE STATIC PRESSURE RESET LOGIC 5 MINUTES AFTER THE SUPPLY FAN IS ON. REDUCE THE STATIC PRESSURE SETPOINT BY 0.04” EVERY 2 MINUTES. AS THE STATIC PRESSURE SETPOINT DROPS, THE VAV BOXES DOWNSTREAM WILL OPEN FURTHER. ONCE 1 VAV BOX OPENS MORE THAN 95%, STOP SEQUENCE. WHEN TWO OR MORE VAV BOXES OPEN TO 95% OR MORE THEN INCREASE THE STATIC PRESSURE SETPOINT BY 0.06” EVERY 10 MINUTES UNTIL ALL VAV BOXES ARE LESS THAN 85% OPEN. BEGIN REDUCING THE STATIC PRESSURE SETPOINT BY 0.04” EVERY 5
MINUTES TO RESTART THE CONTROL LOOP.
THE HIGH STATIC SHUTDOWN SENSOR SHALL PREVENT THE SUPPLY FAN FROM DEVELOPING OVER 3" OF STATIC PRESSURE. IF STATIC PRESSURE EXCEEDS 3", THE SUPPLY FAN SHALL STOP AND THE UNIT SHALL BE SHUT DOWN.
THE HIGH STATIC SHUTDOWN SENSOR WILL REQUIRE MANUAL RESET AT THE DEVICE.
THE RETURN FAN VARIABLE SPEED MOTOR CONTROLLER (VSMC) SHALL CONTROL THE FAN SPEED TO MAINTAIN A
CONSTANT RETURN PLENUM STATIC PRESSURE OF 0.01".
TEMPERATURE CONTROL
THE AIR HANDLING UNIT SHALL ENTER "COOLING MODE" WHENEVER THE MIXED AIR TEMPERATURE IS ABOVE 50 DEG
F AND "HEATING MODE" WHENEVER THE MIXED AIR TEMPERATURE IS BELOW 50 DEG F.
IN COOLING MODE, MODULATE THE COOLING VALVE TO MAINTAIN THE LEAVING AIR TEMPERATURE SETPOINT, 55
DEG F. THE PREHEATING VALVE AND HUMIDIFIER ISOLATION VALVE SHALL BE CLOSED.
IN HEATING MODE, THE PREHEATING ON/OFF CONTROL VALVE SHALL OPEN. THE IFB DAMPER SHALL BE OPEN TO THE BYPASS AND SHALL MODULATE CLOSED TO MAINTAIN THE LEAVING AIR TEMPERATURE SETPOINT, 55 DEG F.
THE COOLING VALVE SHALL BE CLOSED AND THE HUMIDIFIER ISOLATION VALVE SHALL BE OPEN. IF LEAVING AIR TEMPERATURE SENSOR INDICATES 5 DEG F ABOVE THE SETPOINT THEN CLOSE PREHEAT CONTROL VALVE UNTIL
SENSOR READS 1 DEG F BELOW SETPOINT.
DAMPER OPERATION
THE OUTDOOR AIR DAMPER SHALL MODULATE TO MAINTAIN AN OUTDOOR AIRFLOW THAT IS EQUAL TO THE MINIMUM
OUTDOOR AIRFLOW SETPOINT IN THE AIR HANDLING UNIT SCHEDULE ON SHEET M601.
THE RELIEF AIR DAMPER SHALL MODULATE TO MAINTAIN A BUILDING DIFFERENTIAL PRESSURE SETPOINT OF 0.02".
ECONOMIZER OPERATION
THE AIR HANDLING UNIT SHALL ENTER "ECONOMIZER MODE" WHENEVER THE OUTDOOR AIR ENTHALPY IS BELOW
THE RETURN AIR ENTHALPY AND THE OUTDOOR AIR TEMPERATURE IS BELOW 75 DEG F.
IN ECONOMIZER MODE, MODULATE THE OUTSIDE AND MIXED AIR DAMPERS TO MAINTAIN THE ECONOMIZER MIXED AIR TEMPERATURE SETPOINT, 50 DEG F. THE OUTSIDE AIR DAMPER SHALL NOT MODULATE BELOW MINIMUM
POSITION.
HUMIDITY CONTROL
THE AIR HANDLING UNIT SHALL ENTER "HUMIDIFICATION MODE" WHENEVER THE AIR HANDLING UNIT IS IN HEATING MODE AND THE RETURN AIR HUMIDITY IS BELOW 30%. THE HUMIDIFIER ISOLATION VALVE SHALL OPEN FULLY.
IN HUMIDIFICATION MODE, MODULATE THE HUMIDIFIER CONTROL VALVE OPEN UNTIL THE RETURN AIR HUMIDITY IS
ABOVE 35%, THEN CLOSE THE HUMIDIFIER CONTROL VALVE.
ALARMS
WHEN THE PREHEAT COIL LEAVING AIR TEMPERATURE IS BELOW 40 DEG F, CLOSE THE OUTDOOR AIR DAMPER, CLOSE THE COOLING VALVE, OPEN THE PREHEATING VALVE AND SEND AN ALARM TO THE OPERATOR WORKSTATION. IF THE FREEZESTAT SENSES A TEMPERATURE BELOW 35 DEG F, SHUT DOWN THE UNIT. THE
FREEZESTAT WILL REQUIRE MANUAL RESET AT THE DEVICE.
SEND ALARM TO THE OPERATOR WORKSTATION UPON FAILURE OF THE VSMC FOR THE SUPPLY OR RETURN FAN.
THE SUPPLY OR RETURN FAN SHALL BE STARTED/STOPPED MANUALLY AT THE DIGITAL CONTROL PANEL OR THE
STARTER BY-PASS. THE FAN SHALL OPERATE AT CONSANT SPEED.
SEND ALARM TO THE OPERATOR WORKSTATION WHEN EITHER THE MERV 7 OR MERV 14 PREFILTER DIFFERENTIAL PRESSURE SENSOR READS A HIGHER DIFFERENTIAL PRESSURE THAN THE CHANGEOVER DIFFERENTIAL PRESSURE
DETERMINED BY THE FILTER MANUFACTURER.
IF COOLING MODE IS NOT ENABLED, SEND ALARM TO THE OPERATOR WORKSTATION IF THE SUPPLY AIR HUMIDITY IS
ABOVE 90% AND CLOSE THE HUMIDIFIER ISOLATION VALVE.
WHEN PRODUCTS OF COMBUSTION ARE SENSED BY THE SUPPLY AIR SMOKE DETECTOR, DE-ENERGIZE THE SUPPLY AND RETURN FAN AND SHUT DOWN THE AIR HANDLING UNIT. SEND AN ALARM TO THE OPERATOR WORKSTATION.
EXISTING LAB EXHAUST FAN CONTROL
GENERAL
THE EXISTING LAB EXHAUST FAN AND ITS CONTROLS AND SEQUENCES OF OPERATION SHALL
REMAIN. INTEGRATE NEW EXHAUST AIR STATIC PRESSURE SENSOR INTO THE EXISTING CONTROL
SYSTEM. EXHAUST AIR STATIC PRESSURE SETPOINT SHALL BE DETERMINED BY THE TEST AND
BALANCE CONTRACTOR.
EXISTING LAB EXHAUST FAN
See Location on Floor Plans
SPS
AI - Exhaust Air Static Pressure
AI - Exhaust Air Humidity
MT
1-AHU-3 Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On
Graphic
MERV 7 Prefilter Differential Pressure x x x
MERV 14 Prefilter Differential Pressure x x x
Outside Air Humidity x x x
Outside Air Temperature x x x
Outside Airflow x x x
Return Air Temperature x x x
Outside Airflow x x x
Mixed Air Temperature x x x
Preheat Coil Leaving Air Temp x x x
Cooling Coil Leaving Water Temp x x x
Cooling Coil Chilled Water Flow x x x
Cooling Coil Leaving Air Temp x x x
Supply Air Humidity x x x
Supply Air Temp x x x
Supply Airflow x x x
Building Differential Pressure x x x
Return Plenum Static Pressure Sensor x x x
Cooling Valve x x x
IFB Damper x x x
Humidifier Control Valve x x x
Supply Fan VSMC Speed x x x
Return Fan VSMC Speed x x x
Outside Air Damper x x x
Mixed Air Damper x x x
Relief Air Damper x x x
Freezestat x x x x
High Static Shutdown x x x x
Supply Air Smoke Detector x x x x
Supply Fan Status x x x
Supply Fan VSMC Fault x x x
Return Fan Status x x x
Return Fan VSMC Fault x x x
Supply Fan Start/Stop x x x
Return Fan Start/Stop x x x
Humidifier Isolation Valve x x x
Preheating ON/OFF Control Valve x x x
Supply Staitc Pressure Setpoint x x x
Leaving Air Temperature Setpoint x x x
Mixed Air Temperature Setpoint x x x
Return Air Humidity Setpoint x x x
Minimum Outdoor Airflow Setpoint x x x
Building Differential Pressure Setpoint x x x
Schedule x
High Return Air Humidity x
High Supply Air Static Pressure x
MERV 7 Prefilter Change Required x x
MERV 14 Prefilter Change Required x x
Supply Fan Failure x
Supply Fan in Hand x
Return Fan Failure x
Return Fan in Hand x
22-AHU-2 Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On
Graphic
MERV 7 Prefilter Differential Pressure x x x
MERV 14 Prefilter Differential Pressure x x x
Preheat Coil Leaving Air Temp x x x
Cooling Coil Leaving Water Temperature x x x
Cooling Coil Leaving Air Temp x x x
Supply Air Humidity x x x
Exhaust Air Humidity x x x
Supply Air Static Pressure x x x
Supply Air Temp x x x
Supply Airflow (Qty 4) x x x
Outside Air Temperature x x x
Cooling Valve x x x
Humidifier Control Valve x x x
IFB Damper x x x
Supply Fan VSMC Speed (Qty 4) x x x
Freezestat x x x x
High Static Shutdown x x x x
Low Static Shutdown x x x x
Supply Fan Status (Qty 4) x x x
Supply Fan VSMC Fault (Qty 4) x x x
Supply Air Smoke Detector x x x
Supply Air Smoke Damper x x x
Outside Air Damper x x x
Preheating ON/OFF Control Valve x x x
Humidifier Isolation Valve x x x
Supply Fan Start/Stop (Qty 4) x x x
Space Humidity Setpoint x x
Supply Air Static Pressure Setpoint x x
Cooling Coil Leaving Air Temperature Setpoint x x
Mixed Air Temperature Setpoint x x
Emergency Shutdown x x
High Supply Air Humidity x
High Supply Air Static Pressure x
MERV 7 Supply Prefilter Change Required x x
MERV 14 Supply Prefilter Change Required x x
Project Number
Building Number
Drawing Number
Project Title
Location
Issue Date Checked Drawn
Drawing Title
VA FORM 08 - 6231
A
FULLY SPRINKLERED
U.S. Department of Veterans Affairs
B
C
D
E
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
A u to d e s k D o c s /A n n A rb o r
V A
M o d e rn iz e B ld g
/F
F E
A n n A rb o r
M o d e rn iz e
B
M E
P rv t
/1
/2
:2
:5
P
M
M701
MECHANICAL CONTROLS
09/02/2022 KF JG
MODERNIZE BUILDING 22 506-21-102
ANN ARBOR, MICHIGAN
100% BID DOCUMENTS
ANN ARBOR
VAMC
Approved: Veteran's Affairs Medical Center
22-AHU-2 CONTROLS DIAGRAM
22-AHU-3 CONTROLS DIAGRAM
No. Revisions: Date:
100% BID DOCUMENTS 09/02/2022
1 ADDENDUM 01 02/14/2023
09/02/2022
4 FAN ARRAY, PROVIDE VFD FOR
EACH FAN.
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