Revised_Drawing_M004_-_HVAC_DETAILS_-_B90.PDF
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- Attached to
- DKGV 12-2035 Construct Fire Station Addition, Bldg. 90 Federal contract opportunity
- Solicitation number
- FA4418-19-R-0004
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Revised Drawing M004 - HVAC DETAILS
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KHRP26A22T
KHRP26A22T
KHRP26A22T
KHRP26A22T
KHRP26A22T
KHRP26A22T
1/4" x 1/2"
1/4" x 1/2"
1/4" x 1/2"
1/4" x 1/2"
1/4" x 1/2"
1/4" x 1/2"
1/4" x 1/2"
3/8" x 5/8"
3/8" x 5/8"
3/8" x 5/8"
3/8" x 5/8"
3/8" x 5/8"
3/8" x 5/8"
AH�1
FXAQ07PVJU
AH�2
FXAQ07PVJU
AH�3
FXAQ07PVJU
AH�4
FXAQ07PVJU
AH�6
FXZQ07MVJU9
AH�5
FXZQ07MMVJU9
AH�7
FXZQ15MVJU9
CU�1
RXYMQ48PVJU
UNIT START COMMAND:
• FACTORY MOUNTED AND WIRED OURDOOR AIR AND RECIRCULATED AIR DAMPER ACTUATORS ARE POWERED.
• EXHAUST FAN STARTS AFTER A 10 SECOND DELAY.
• SUPPLY FAN STARTS 5 SECONDS AFTER EXHAUST FAN.
OCCUPIED / UNOCCUPIED MODE:
• SHALL BE BASED ON A 7�DAY TIME CLOCK INTERNAL TO THE CONTROLLER. THE SCHEDULE SHALL BE SET BY THE END
USER. WHEN A USER INITIATES AND OVERRIDE INPUT, THE DDC WOULD SWITCH FROM UNOCCUPIED TO OCCUPIED MODE. THE DDC WILL RETURN TO THE SCHEDULED OCCUPIED/UNOCCUPIED MODE AFTER THE OVERRIDE TIME HAS EXPIRED. IF THE INTERNAL CLOCK IS DISABLED, A REMOTE CONTACT OF A BMS CAN CONTROL THE
OCCUPIED.UNOCCUPIED MODE.
• OCCUPIED MODE:
1. SUPPLY FAN ON
2. EXHAUST FAN ON
• UNOCCUPIED MODE:
1. SUPPLY FAN OFF
2. EXHAUST FAN OFF
3. TEMPERING OFF
4. OUTDOOR AIR DAMPER CLOSED
5. RETURN DAMPER CLOSED
SUPPLY BLOWER SEQUENCE:
• THE SUPPLY BLOWER IS PROVIDED WITH A FACTORY MOUNTED VFD, AND IS INTENDED TO OPERATE AT A CONSTANT
SPEED DURING OPERATION. THIS SPEED NEEDS TO BE SET DURING TEST AND BALANCE OF THE UNIT.
EXHAUST BLOWER SEQUENCE:
• THE EXHAUST BLOWER IS PROVIDED WITH A FACTORY MOUNTED VFD, AND IS INTENDED TO OPERATE AT A CONSTANT
SPEED DURING OPERATIONS. THIS SPEED NEEDS TO BE SET DURING TEST AND BALANCE OF THE UNIT.
COOLING SEQUENCE:
• THE COOLING IS CONTROLLED TO MAINTAIN THE SUPPLY TEMPERATURE SET POINT. THE MECHANICAL COOLING WILL BE
LOCKED OUT WHEN THE OUTSIDE AIR IS < 55° F � 2° F HYSTERESIS.
• DDC WILL PROVIDE A MODULATING SIGNAL FOR COOLING. FROM 10�50%, THE DIGITAL SCROLL WILL BE CONTROLLED TO
MAINTAIN THE DISCHARGE TEMPERATURE. FROM 50�100%, THE SECOND STAGE WILL BE ON IN COMBINATION WITH THE
DIGITAL SCROLL COMPRESSOR TO MAINTAIN THE DISCHARGE TEMPERATURE.
DEHUMIDIFICATION SEQUENCE:
• THE COOLING IS CONTROLLED TO MAINTAIN THE COOLING�COIL SET POINT. THE DEHUMIDIFICATION SEQUENCE WILL BE
LOCKED OUT WHEN THE OUTSIDE AIR IS <10° F ABOVE THE COLD�COIL SET POINT. THE MECHANICAL COOLING WILL BE
LOCKED OUT WHEN THE OUTSIDE AIR IS < 55° F HYSTERESIS.
• DDC WILL PROVIDE A MODULATING SIGNAL FOR DEHUMIDIFICATION. FROM 10�50%, THE DIGITAL SCROLL WILL BE CONTROLLED TO MAINTAIN THE AFTER�COIL TEMPERATURE. FROM 50�100%, THE SECOND STAGE WILL BE ON IN COMBINATION WITH THE DIGITAL SCROLL COMPRESSOR TO MAINTAIN THE AFTER�COIL TEMPERATURE.
REHEAT SEQUENCE:
• WHILE THE UNIT IS IN DEHUMIDIFICATION MODE, THE OUTDOOR AIR CAN BE REHEATED VIA PRIMARY HEATING SOURCE, ON/OFF HOT GAS REHEAT, OR MODULATING HOT GAS REHEAT FOR SPACE NEUTRAL APPLICATIONS.
• PRIMARY HEATING SOURCE � THE MAIN HEATING SOURCE IS ENABLED TO REHEAT THE AIR TO MEET THE SUPPLY
TEMPERATURE SET POINT.
• MODULATING HOT GAS REHEAT � THE CONTROLLER WILL MODULATE THE HOT GAS REHEAT VALVE WITH A 0�10 V SIGNAL
TO MAINTAIN THE SUPPLY TEMPERATURE SET POINT.
HEATING SEQUENCE:
• THE HEATING IS CONTROLLED TO MAINTAIN THE SUPPLY TEMPERATURE SET POINT. THE HEATING WILL BE LOCKED OUT
WHEN THE OUTSIDE AIR IS > 70°F + 2°F HYSTERESIS.
• DDC WILL MODULATE AN ELECTRIC HEATER TO MAINTAIN THE SUPPLY TEMPERATURE SET POINT.
BUILDING FREEZE PROTECTION:
• IF THE SUPPLY AIR TEMPERATURE DROPS BELOW 35°F, THE DDC WILL DE�ENERGIZE THE UNIT AND ACTIVATE THE ALARM
OUTPUT AFTER A PRESET TIME DELAY.
ALARMS INDICATION � DDC SHALL HAVE ONE DIGITAL OUTPUT FOR REMOTE INDICATION OF AN ALARM CONDITION. POSSIBLE
ALARMS INCLUDE:
• DIRTY FILTER ALARM: IF THE OUTSIDE AIR OR RETURN AIR FILTER DIFFERENTIAL PRESSURE RISES ABOVE THE SWITCH
SET POINT, THE DIFFERENTIAL PRESSURE SWITCH SHALL SIGNAL THE DDC TO ACTIVATE AN ALARM.
• DIRTY WHEEL ALARM: DDC MONITORS PRESSURE ACROSS THE WHEEL AND SENDS AN ALARM IN THE CASE OF AN
INCREASED PRESSURE DROP.
• SUPPLY AND EXHAUST AIR ALARM: DDC MONITORS PROVING SWITCH ON EAHC BLOWER AND DISPLAYS AN ALARM IN
CASE OF BLOWER FAILURE
• DX ALARM: DDC MONITORS THE REFRIGERANT PRESSURE AND SHUTS OFF REFRIGERATION CIRCUIT IN THE CASE OF HIG
OR LOW REFRIGERANT PRESSURE.
• TEMPERATURE SENSOR ALARM: DDC WILL SEND AN ALARM IN THE CASE OF A FAILED AIR TEMPERATURE SENSOR.
• PRESSURE SENSOR ALARM: DDC WILL SEND AN ALARM IN THE CASE OF A FAILED PRESSURE SENSOR.
NOTES:
24" DIA. MIN.
GRADE
1. COVER WITH LANDSCAPE AFTER INSPECTION IS COMPLETED.
DRAIN PAN DRAIN LINE
HOLE IN GROUND
24" DIAMETER MIN.
BY 24" DEEP MIN.
FILLED WITH CRUSHED
STONE 1/2" TO
1 1/2" SIZE.
2. CONTRACTOR SHALL VERIFY THAT THE PRIMARY CONDENSATE DRAIN LINE IS IN WORKING
ORDER BY RUNNING WATER DOWN THRU THE DRAIN LINE FROM THE POINT OF THE COIL
CONNECTION PRIOR TO BURIAL.
3. DRAIN PAN DRAIN LINE SHALL TERMINATE 6" ABOVE FINISHED GRADE OVER TOP OF THE
DRAIN PIT.
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ANSI D(22X34)ANSI D(22X34)ANSI D(22X34)ANSI D(22X34)
78787878
M004M004M004M004
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DKGV 12�2035DKGV 12�2035DKGV 12�2035DKGV 12�2035
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NOTE:
PIPING DIAGRAM SHOWN IS CONSISTENT WITH BASIS OF DESIGN MANUFACTURER'S
RECOMMENDATIONS. ANY SUBSTITUTION IN PRODUCT SHALL PROVIDE A SIMILAR
DIAGRAM TO THE INSTALLER BASED ON MANUFACTURER'S RECOMMENDATIONS.
PIPING LENGTHS SHALL BE FIELD VERIFIED BASED ON INSTALLATION LOCATIONS.
NOT TO SCALEM004 M004
4 CU�1 CONNECTION SCHEMATIC
NOT TO SCALEM004 M004
3 DEDICATED OUTDOOR AIR UNIT CONTROL SEQUENCE AND POINTS LIST
NOT TO SCALEM004 M004
2 DEDICATED OUTDOOR AIR UNIT CONTROL DIAGRAM
NOT TO SCALEM004 M004
1 DRAIN PIT DETAIL
53535353
Hardware Points Software Points
Point Name AI AO BI BO AV BV Loop Sched Trend Alarm Show On Graphic
Exhaust Air Temp x x x
Final Filter Differential Pressure x x
Heat Wheel Discharge Air Temp x x x
Outside Air Temp x x x
Prefilter Differential Pressure x x
Return Air Temp x x x
Supply Air Temp x x x
Exhaust Fan Status x x x
Cooling Coil Temp x x x x
Heat Wheel Status x x x
Outside Air Damper Status x x x
Supply Fan Status x x x
Cooling Stage 1 x x x
Exhaust Fan Start/Stop x x x
Heat Wheel Bypass Dampers x x x
Heat Wheel Start/Stop x x x
Heating Stage 1 x x x
Outside Air Damper x x x
Supply Fan Start/Stop x x x
Supply Air Temp Setpoint x x x
Schedule x
Compressor Runtime Exceeded x
Exhaust Fan Failure x
Exhaust Fan in Hand x
Exhaust Fan Runtime Exceeded x
Final Filter Change Required x x
Heat Wheel in Hand x
Heat Wheel Rotation Failure x
Heat Wheel Runtime Exceeded x
High Supply Air Temp x
Low Supply Air Temp x
Outside Air Damper Failure x
Outside Air Damper in Hand x
Prefilter Change Required x x
Supply Fan Failure x
Supply Fan in Hand x
Supply Fan Runtime Exceeded x
Totals 8 0 8 7 1 0 0 1 23 20 23
Total Hardware (24) Total Software (67)
DX
BO � Cooling Stage 1
DX
BO � Hot Gas Reheat
BI � Exhaust Fan Status
BO � Exhaust Fan Start/Stop
EA
CT
Starter
EF
S
BO � Outside Air Damper
BI � Outside Air Damper Status
N.C.
BI � Cooling Coil Temp
T
M
Starter
CT
BI � Supply Fan Status
BO � Supply Fan Start/Stop
H L
AI � Final Filter Differential Pressure
OA SA
T
AI � Supply Air Temp
H L
AI � Prefilter Differential Pressure
M
T
N.C.
N.C.
S
S
RAEA
StarterCT BO � Heat Wheel Start/Stop
BI � Heat Wheel Status
AI � Heat Wheel Discharge Air Temp
AI � Return Air Temp
AI � Outside Air Temp
AI � Exhaust Air Temp
BO � Heat Wheel Bypass Dampers
BO � Heat Wheel Bypass Dampers
T
TT
M HL
AI � Exhaust Filter Differential Pressure
Exhaust Filter Differential Pressure x x
T T
Elec
BO � Heating Stage 1
BI � Hot Gas Reheat Temp
BI � Heater Temp
Hot Gas Reheat Temp x x x x
Heater Temp x x x x
C
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BI � Air Flow Monitoring Station
Air Flow Monitoring Station x x x
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