Atch_9-CAFB_DDC_Requirements_Guide_-_Sep_2014.pdf
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Atch 9: CAFB DDC Requirements
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2 7 S O C E S / C E N
DDC General Requirements Guide
For Cannon Air Force Base Scott Hindt - Mechanical Engineer Dave Proctor - EMCS Technician
Barry King - EMCS Technician
U.S Air Force
Page 1 Cannon Air Force Base September 2014
(BLANK PAGE)
September 2014 Cannon Air Force Base Page 2
TABLE OF CONTENTS
I. DIRECT DIGITAL CONTROL SYSTEM
1. GENERAL REQUIREMENTS
2. TECHNICIAN WORKSTATION
3. PROGRAMMING
4. EMCS PANEL
II. DIRECT DIGITAL CONTROL POINTS
1. MINIMUM POINTS LIST
2. GENERAL REQUIREMENTS
3. EXHAUST/SUPPLY FANS
4. AIR HANDLING UNITS – VAV BOX SYSTEM
5. AIR HANDLING UNITS – SINGLE ZONE
6. AIR HANDLING UNITS - THREE DECK MULTIZONE
7. AIR HANDLING UNITS - TWO DECK MULTIZONE
8. PACKAGE A/C UNITS – GAS HEATER
9. DEDICATED OUTDOOR AIR UNITS
10. TERMINAL UNITS – FAN COIL
11. TERMINAL UNITS – FAN POWERED VARIABLE AIR VOLUME
12. TERMINAL UNITS – VARIABLE AIR VOLUME
13. BOILER
14. CHILLER
15. DOMESTIC HW SYSTEM AND RECIRCULATING PUMP UNIT (MONITOR ONLY)
16. DOMESTIC WATER BOOSTER PUMP UNIT (MONITOR ONLY)
17. UTILITY METERS
III. DIRECT DIGITAL CONTROL GRAPHIC SCREENS
1. GENERAL REQUIREMENTS
2. TOP DISPLAY
3. OVERVIEW
4. FLOOR PLAN
5. AIR HANDLING UNITS – VAV BOX SYSTEM
6. AIR HANDLING UNITS – SINGLE ZONE
7. AIR HANDLING UNITS - THREE DECK MULTIZONE
8. ZONES - THREE DECK MULTIZONE
9. AIR HANDLING UNITS - TWO DECK MULTIZONE
10. ZONES - TWO DECK MULTIZONE
11. PACKAGED A/C UNITS - GAS HEATER
12. DEDICATED OUTDOOR AIR UNITS
13. TERMINAL UNITS – FAN COIL (WATER COIL HEATING/COOLING)
14. TERMINAL UNITS – FAN COIL (WATER COIL HEATING, DX COOLING, ECONOMIZER)
15. TERMINAL UNITS – FAN POWERED VARIABLE AIR VOLUME
16. TERMINAL UNITS – VARIABLE AIR VOLUME
17. BOILER
18. CHILLER
APPENDIX A
Page 3 Cannon Air Force Base September 2014
(BLANK PAGE)
September 2014 Cannon Air Force Base Page 4
I. Direct Digital Control System
1. General Requirements
1.1. A DDC system is required for any building that
has 10 tons of cooling or more whether in a single system or multiple systems combined.
1.2. Cannon AFB has received Air Force Special
Operations Command (AFSOC) authority to operate (ATO) Alerton hardware and Envision 2.0 software on existing base VLAN. These are the only systems that are currently authorized to connect to the base VLAN. All other proposed equipment and software shall receive ATO approval through AFSOC prior to installation.
1.3. The Installing Contractor shall complete and
submit an IP Address Request Form to Mr. Howard Blake 27 SOCES prior to installation of DDC system unless other arrangements are made with the Cannon AFB EMCS Technicians. The form shall be submitted utilizing an AF Form 3000.
1.4. All equipment (to include dampers) in the ceiling
space shall be labeled on the T-bars of the drop ceiling.
1.5. All T-stats shall be labeled with the equipment tag
of the unit it controls.
1.6. All navigation buttons shall be security level 5.
1.7. All data entry buttons and tickers shall be security
level 10.
2. Technician Workstation
2.1. Located in building 371.
2.2. The existing Base EMCS system front end software
and tools shall be able to fully customize device programming and be capable of sending changes to existing device programming and/or new programming for added devices to the DDC controllers located in the project building.
Microsoft Visio is currently used to create and send programs to building controllers. The proposed system shall utilize the graphical block programming offered by Visio to create and send new programs.
2.3. Communication with the Technician Workstation
and server (B355) shall be through existing Base VLAN using BACnet protocols in accordance with ASHRAE 135 BACnet Communication without the use of gateways or additional software.
2.4. MS/TP network settings shall be configured and/or
modified utilizing the existing software and tools installed to include device instances, network numbers, mac addresses and baud rate.
2.5. Automatic weekly updates shall be saved to the
existing server (B355).
2.6. Installing Contractor shall identify a Site Manager
for Cannon AFB. The Site Manager shall be the only one who has permission to upload new programs and graphics with supervision by the Cannon AFB EMCS Technicians.
2.7. All modifications to the existing Base EMCS system
software and hardware shall be done by technicians who are currently certified and trained.
The Contractor shall upload the current program and graphics being used prior to any work being done on existing building programs.
2.8. New programs shall be proofed by the Base EMCS
Technicians before being uploaded.
2.9. New programs shall be uploaded at least one week
prior to the final inspection of the project.
2.10. The Installing contractor shall meet with Cannon
AFB EMCS technicians prior to the building final to verify that there is connectivity to the Technician Workstation.
3. Programming
3.1. All systems shall be programmed with an
occupancy schedule. The installing contractor shall work with the user to determine and test an actual occupancy schedule before the final inspection.
3.2. The MS/TP Network # shall be the same as the
building number.
3.3. Each equipment item shall be described in the
device manager in the following format: Building #_Device #_Room #.
4. EMCS Panel
4.1. All demoed DDC controller of any manufacturer
shall be turned over the base EMCS Technicians.
4.2. All controllers shall be located in the mechanical
room of the building in a dedicated enclosure. The Building Control Module (BCM) shall be installed in a lockable panel that is keyed to match the current EMCS panel key used by the Base EMCS Technicians.
Page 5 Cannon Air Force Base September 2014
4.3. Each main piece of equipment shall have its own
dedicated controller(s) (AHU, Boiler, Chiller, etc.).
Each controller shall have 25% of inputs/outputs open (IN, AO, BO).
4.4. Ensure wire raceways are used inside the
enclosure and covers are in place to provide a neat and tidy organization of wires.
4.5. Install a standard electrical outlet if one does not
exist.
4.6. Provide controller termination diagram to depict
the controller and connected peripherals for easy trouble shooting. One copy shall be submitted with the O&M manuals and a second copy shall be mounted on the interior door of the panel.
4.7. Utilize wire labels to physically identify the wire
used for each peripheral.
4.8. CAT-6 cable shall be pulled from the patch panel
located in the communications room of the project building to the BCM in the mechanical room mounted in a dedicated enclosure.
September 2014 Cannon Air Force Base Page 6
II. Direct Digital Control Points
1. Minimum Points List
FANS
EXHAUST/SUPPLY AI BI AO BO ALARM
ON/OFF X
FAN STATUS - CURRENT (< 5HP) X
FAN STATUS - CURRENT SWITCH (≥ 5HP) X
FAN SPEED (≥ 5HP) X
AIR HANDLING UNITS
VAV BOX SYSTEM AI BI AO BO ALARM
SUPPLY FAN ON/OFF X
SUPPLY FAN STATUS - CURRENT (< 5HP) X
SUPPLY FAN STATUS - CURRENT SWITCH (≥ 5HP) X
SUPPLY FAN SPEED (≥ 5HP) X
SUPPLY AIR TEMPERATURE X
SUPPLY AIR STATIC PRESSURE X
SUPPLY AIR HIGH LIMIT STATIC PRESSURE X X
SUPPLY AIR FLOW X
SUPPLY AIR DUCT SMOKE (> 2000 CFM) X X
SUPPLY AIR RELATIVE HUMIDITY (IF REQUIRED) X
HUMIDIFIER SIGNAL (IF REQUIRED) X
RETURN FAN ON/OFF X
RETURN FAN STATUS - CURRENT (NO VFD) X
RETURN FAN STATUS - CURRENT SWITCH (VFD) X
RETURN FAN SPEED (SUPPLY FAN ≥ 5HP) X
RETURN AIR TEMPERATURE X
RETURN AIR DUCT SMOKE (IF NO AREA DETECTION SYSTEM) X X
RETURN AIR DAMPER POSITION X
RETURN AIR FLOW X
RETURN AIR CO2 X
RETURN AIR RELATIVE HUMIDITY (IF REQUIRED)
OUTSIDE AIR TEMPERATURE (ONE PER FACILITY) X
OUTSIDE AIR DAMPER POSITION X
OUTSIDE AIR FLOW X
OUTSIDE AIR CO2 X
RELIEF AIR DAMPER POSITION X
BUILDING PRESSURE X
MIXED AIR TEMPERATURE X
FILTER PRESSURE DIFFERENTIAL X X
COOLING VALVE POSITION X
HEATING VALVE POSITION X
LOW LIMIT TEMPERATURE (FREEZE STAT) X X
Page 7 Cannon Air Force Base September 2014
SINGLE ZONE AI BI AO BO ALARM
SPACE TEMPERATURE X
SUPPLY FAN ON/OFF X
SUPPLY FAN STATUS - CURRENT (< 5HP) X
SUPPLY FAN STATUS - CURRENT SWITCH (≥ 5HP) X
SUPPLY FAN SPEED (≥ 5HP) X
SUPPLY AIR TEMPERATURE X
SUPPLY AIR STATIC PRESSURE X
SUPPLY AIR HIGH LIMIT STATIC PRESSURE X X
SUPPLY AIR FLOW X
SUPPLY AIR DUCT SMOKE (> 2000 CFM) X X
RETURN FAN ON/OFF X
RETURN FAN STATUS - CURRENT (NO VFD) X
RETURN FAN STATUS - CURRENT SWITCH (VFD) X
RETURN FAN SPEED (SUPPLY FAN ≥ 5HP) X
RETURN AIR TEMPERATURE X
RETURN AIR DUCT SMOKE (IF NO AREA DETECTION
SYSTEM)
X X
RETURN AIR DAMPER POSITION X
RETURN AIR FLOW X
RETURN AIR CO2 X
OUTSIDE AIR TEMPERATURE (ONE PER FACILITY) X
OUTSIDE AIR DAMPER POSITION X
OUTSIDE AIR FLOW X
OUTSIDE AIR CO2 X
RELIEF AIR DAMPER POSITION X
BUILDING PRESSURE X
MIXED AIR TEMPERATURE X
FILTER PRESSURE DIFFERENTIAL X X
COOLING VALVE POSITION X
September 2014 Cannon Air Force Base Page 8
THREE DECK MULTIZONE AI BI AO BO ALARM
SPACE TEMPERATURE X
SUPPLY FAN ON/OFF X
SUPPLY FAN STATUS - CURRENT (< 5HP) X
SUPPLY FAN STATUS - CURRENT SWITCH (≥ 5HP) X
SUPPLY FAN SPEED (≥ 5HP) X
SUPPLY AIR TEMPERATURE (EACH ZONE) X
COLD DECK AIR TEMPERATURE X
HOT DECK AIR TEMPERATURE X
BYPASS DECK AIR TEMPERATURE X
SUPPLY AIR STATIC PRESSURE X
SUPPLY AIR HIGH LIMIT STATIC PRESSURE X X
SUPPLY AIR FLOW X
SUPPLY AIR DUCT SMOKE (> 2000 CFM) X X
RETURN FAN ON/OFF X
RETURN FAN STATUS - CURRENT (NO VFD) X
RETURN FAN STATUS - CURRENT SWITCH (VFD) X
X X
RETURN AIR DAMPER POSITION X
RETURN AIR FLOW X
RETURN AIR CO2 X
OUTSIDE AIR TEMPERATURE (ONE PER FACILITY) X
OUTSIDE AIR DAMPER POSITION X
OUTSIDE AIR FLOW X
OUTSIDE AIR CO2 X
RELIEF AIR DAMPER POSITION X
BUILDING PRESSURE X
MIXED AIR TEMPERATURE X
FILTER PRESSURE DIFFERENTIAL X X
BYPASS DAMPER POSITION X
MULTIZONE DAMPER POSITION (EACH ZONE) X
COOLING VALVE POSITION X
Page 9 Cannon Air Force Base September 2014
TWO DECK MULTIZONE AI BI AO BO ALARM
SPACE TEMPERATURE X
SUPPLY FAN ON/OFF X
SUPPLY FAN STATUS - CURRENT (< 5HP) X
SUPPLY FAN STATUS - CURRENT SWITCH (≥ 5HP) X
SUPPLY FAN SPEED (≥ 5HP) X
SUPPLY AIR TEMPERATURE (EACH ZONE) X
COLD DECK AIR TEMPERATURE X
HOT DECK AIR TEMPERATURE X
SUPPLY AIR STATIC PRESSURE X
SUPPLY AIR HIGH LIMIT STATIC PRESSURE X X
SUPPLY AIR FLOW X
SUPPLY AIR DUCT SMOKE (> 2000 CFM) X X
RETURN FAN ON/OFF X
RETURN FAN STATUS - CURRENT (NO VFD) X
RETURN FAN STATUS - CURRENT SWITCH (VFD) X
X X
RETURN AIR DAMPER POSITION X
RETURN AIR FLOW X
RETURN AIR CO2 X
OUTSIDE AIR TEMPERATURE (ONE PER FACILITY) X
OUTSIDE AIR DAMPER POSITION X
OUTSIDE AIR FLOW X
OUTSIDE AIR CO2 X
RELIEF AIR DAMPER POSITION X
BUILDING PRESSURE X
MIXED AIR TEMPERATURE X
FILTER PRESSURE DIFFERENTIAL X X
MULTIZONE DAMPER POSITION (EACH ZONE) X
COOLING VALVE POSITION X
September 2014 Cannon Air Force Base Page 10
PACKAGED A/C - GAS FURNACE AI BI AO BO ALARM
SPACE TEMPERATURE X
SUPPLY FAN ON/OFF X
SUPPLY FAN STATUS - CURRENT (< 5HP) X
SUPPLY FAN STATUS - CURRENT SWITCH (≥ 5HP) X
SUPPLY FAN SPEED (≥ 5HP) X
SUPPLY AIR TEMPERATURE X
SUPPLY AIR STATIC PRESSURE X
SUPPLY AIR HIGH LIMIT STATIC PRESSURE X X
SUPPLY AIR FLOW X
SUPPLY AIR DUCT SMOKE (> 2000 CFM) X X
RETURN FAN ON/OFF X
RETURN FAN STATUS - CURRENT (NO VFD) X
RETURN FAN STATUS - CURRENT SWITCH (VFD) X
X X
RETURN AIR DAMPER POSITION X
RETURN AIR FLOW X
RETURN AIR CO2 X
OUTSIDE AIR TEMPERATURE (ONE PER FACILITY) X
OUTSIDE AIR DAMPER POSITION X
OUTSIDE AIR FLOW X
OUTSIDE AIR CO2 X
RELIEF AIR DAMPER POSITION X
BUILDING PRESSURE X
MIXED AIR TEMPERATURE X
FILTER PRESSURE DIFFERENTIAL X X
CONDENSER ON/OFF X
COMPRESSOR STATUS - CURRENT (EACH COMPRESSOR) X
HEATER ON/OFF X
Page 11 Cannon Air Force Base September 2014
DEDICATED OUTDOOR AIR UNIT AI BI AO BO ALARM
SPACE TEMPERATURE X
SUPPLY FAN ON/OFF X
SUPPLY FAN STATUS - CURRENT (< 5HP) X
SUPPLY FAN STATUS - CURRENT SWITCH (≥ 5HP) X
SUPPLY FAN SPEED (≥ 5HP) X
SUPPLY AIR TEMPERATURE X
SUPPLY AIR STATIC PRESSURE X
SUPPLY AIR HIGH LIMIT STATIC PRESSURE X X
SUPPLY AIR FLOW X
SUPPLY AIR DUCT SMOKE (> 2000 CFM) X X
OUTSIDE AIR TEMPERATURE (ONE PER FACILITY) X
OUTSIDE AIR DAMPER POSITION X
OUTSIDE AIR FLOW X
RELIEF AIR DAMPER POSITION X
BUILDING PRESSURE X
FILTER PRESSURE DIFFERENTIAL X X
COOLING VALVE POSITION X
HUMIDITY CONTROL - ADD AI BI AO BO ALARM
SPACE RELATIVE HUMIDITY X
SUPPLY AIR RELATIVE HUMIDITY X
HUMIDIFIER SIGNAL X
TERMINAL UNITS - FAN COILS
FAN COIL AI BI AO BO ALARM
SPACE TEMPERATURE X
SUPPLY FAN ON/OFF X
SUPPLY FAN STATUS - CURRENT X
SUPPLY AIR TEMPERATURE X
SUPPLY AIR DUCT SMOKE (> 2000 CFM) X X
X X
OUTSIDE AIR TEMPERATURE (ONE PER FACILITY) X
FILTER PRESSURE TRANSMITTER X
WATER COOLING - ADD AI BI AO BO ALARM
COOLING VALVE POSITION X
DX COOLING - ADD AI BI AO BO ALARM
CONDENSER ON/OFF X
COMPRESSOR STATUS - CURRENT (EACH COMPRESSOR) X
September 2014 Cannon Air Force Base Page 12
WATER HEATING - ADD AI BI AO BO ALARM
HEATING VALVE POSITION X
GAS HEATING - ADD AI BI AO BO ALARM
FURNACE ON/OFF X
ECONOMIZER - ADD AI BI AO BO ALARM
SUPPLY AIR FLOW X
RETURN AIR TEMPERATURE X
RETURN AIR DAMPER POSITION X
RETURN AIR CO2 X
OUTSIDE AIR DAMPER POSITION X
OUTSIDE AIR FLOW X
OUTSIDE AIR CO2 X
RELIEF AIR DAMPER POSITION X
BUILDING PRESSURE X
MIXED AIR TEMPERATURE X
HUMIDITY CONTROL - ADD AI BI AO BO ALARM
SPACE RELATIVE HUMIDITY X
SUPPLY AIR RELATIVE HUMIDITY X
HUMIDIFIER SIGNAL X
TERMINAL UNITS VAV BOXES
FAN POWERED AI BI AO BO ALARM
SPACE TEMPERATURE X
DISCHARGE AIR TEMPERATURE X
DISCHARGE AIR FLOW X
DAMPER POSITION X
REHEAT VALVE POSITION X
FAN ON/OFF X
FAN CURRENT SENSOR X
STANDARD AI BI AO BO ALARM
SPACE TEMPERATURE X
DISCHARGE AIR TEMPERATURE X
DISCHARGE AIR FLOW X
DAMPER POSITION X
REHEAT VALVE POSITION X
Page 13 Cannon Air Force Base September 2014
BOILER
BOILER AND HW PUMP AI BI AO BO ALARM
BOILER ON/OFF X X
OUTSIDE AIR TEMPERATURE (ONE PER FACILITY) X
SUPPLY WATER TEMPERATURE X
DIFFERENTIAL PRESSURE ACROSS PUMP X
RETURN WATER TEMPERATURE X
WATER MIXING VALVE POSITION X
PUMP ON/OFF (EACH PUMP) X
PUMP STATUS - CURRENT (< 5HP) X
PUMP STATUS - CURRENT SWITCH (≥ 5HP) X
PUMP SPEED X
WATER FLOW X
BOILER INLET TEMPERATURE X
BOILER DISHARGE TEMPERATURE X
CHILLER
CHILLER AND CHW PUMP AI BI AO BO ALARM
CHILLER ON/OFF X X
OUTSIDE AIR TEMPERATURE (ONE PER FACILITY) X
COMPRESSOR STATUS - CURRENT (EACH COMPRESSOR) X
ISOLATION VALVE POSITION (IF MORE THAN ONE CHILLER) X
SUPPLY WATER TEMPERATURE X
DIFFERENTIAL PRESSURE ACROSS PUMP X
RETURN WATER TEMPERATURE SENSOR X
WATER MIXING VALVE POSITION X
PUMP ON/OFF (EACH PUMP) X
PUMP STATUS - CURRENT (< 5HP) X
PUMP STATUS - CURRENT SWITCH (≥ 5HP) X
PUMP SPEED X
WATER FLOW X
CHILLER INLET TEMPERATURE X
CHILLER DISCHARGE TEMPERATURE X
CONDENSING UNIT AI BI AO BO ALARM
COMPRESSOR ON/OFF X X
COMPRESSOR STATUS - CURRENT (EACH COMPRESSOR) X
September 2014 Cannon Air Force Base Page 14
2. General Requirements
2.1. As a minimum, the following systems shall be
provided with the indicated control points for monitoring and control of the HVAC systems installed.
2.2. Outside Air Temperature - Display air
temperature in °F. Sensor shall be mounted to the north facing exterior wall of the building at least 4” away from the wall surface and include shielding from direct sunlight.
2.3. Building pressure - Display building pressure in
iwc. Building pressure shall be used to control the relief damper.
2.4. A VFD is required for any motor greater than or
equal to 5 hp. If supply fan motor is large enough to have a VFD, the return fan (if equipped) shall also have a VFD regardless of size.
2.5. All penetrations through the exterior of the
building shall include a motorized actuator to close the opening in the event of an emergency shutdown.
2.6. The system shall be programed to default to heat
mode in the event of a power outage.
2.7. ATFP - Each facility shall have at least one
centrally located emergency HVAC shutdown button within 200 feet from any point in the building. When pressed, all fans in the building will disable and all exterior penetrations shall close. The EMCS front end software must also be capable of activating this feature remotely.
3. Exhaust/Supply Fans
3.1. On/Off - Fan shall be on or off as shown in design.
3.2. Fan Status (< 5HP) - Measure current through the
motor in amps.
3.3. Fan Status (≥ 5HP) - Detect current through the
motor with a switch.
3.4. Fan Speed (≥ 5HP) - Fan speed signal sent to the
VFD.
4. Air Handling Units – VAV Box System
4.1. Supply fan on/off: Fan shall be on unless disabled
due to alarm status of occupancy schedule.
4.2. Supply fan status (< 5HP) - Measure current
through the motor in amps.
4.3. Supply fan status (≥ 5HP) - Detect current
through the motor with a current switch.
4.4. Supply fan speed (≥ 5HP) - Fan speed shall
modulate to maintain the specified duct static pressure. A minimum supply power shall be set according to motor’s manufacturer suggested requirements.
4.5. Supply air temperature - A reset schedule shall be
programmed to provide 55°F (Adj) air when the highest cooling signal is 100% and provide 65°F (Adj) air when the highest cooling signal is below 100%.
4.6. Supply air static pressure - Measure duct pressure
in iwc. The VFD (if equipped) shall maintain the specified set-point (Adj).
4.7. Supply air high limit static pressure - When duct
pressure exceeds 4 iwc (Adj), disable the AHU utilizing the freeze stat sequence.
4.8. Supply air flow - Measure flow rate in units of
CFM.
4.9. Supply air duct smoke (> 2000cfm) - When
smoke is detected, disable the AHU utilizing the freeze stat sequence.
4.10. Return fan on/off (if equipped with return fan) -
Fan shall be interlocked with the supply fan and be on unless disabled due to alarm status of occupancy schedule.
4.11. Return fan status (No VFD) - Measure current
through the motor in amps.
4.12. Return fan status (VFD) - Detect current through
the motor with a current switch.
4.13. Return fan speed (Supply fan > 5HP) - Fan speed
shall modulate to track the supply air fan speed at 50% (Adj). A minimum supply power shall be set according to motor’s manufacturer suggested requirements.
4.14. Return air temperature - Measure air
temperature in °F.
4.15. Return air duct smoke - When smoke is detected, disable the AHU utilizing the freeze stat sequence.
4.16. Return air damper position - Shall modulate
opposite of the outside air damper through linkage or additional actuator.
4.17. Return air flow - Measure flow rate in units of
CFM.
4.18. Return air CO2 - Measure the CO2 level in ppm.
4.19. Outside air damper position - Link damper
control with return air damper to open/close opposite of each other. Outside air and return air damper positions shall modulate to maintain the supply air set-point in cooling mode only.
Two modes shall be available as described below.
Page 15 Cannon Air Force Base September 2014
4.19.1. Auto mode: 100% outside air shall be
enabled when the outside air temperature is less than the return air temperature. During unfavorable outside air conditions the outside air shall modulate to maintain a set CO2 differential (Adj) between the return and outside air.
4.19.2. Manual mode: 100% outside air shall be
enabled when the outside air temperature is less than OAT Manual High SP (Adj). During unfavorable outside air conditions the outside air damper shall open to the set minimum position (Adj).
4.20. Outside air flow - Measure flow rate in units of
CFM.
4.21. Outside air CO2 - Measure the CO2 level in ppm.
4.22. Relief air damper position - Damper shall
modulate to maintain the specified building pressure set-point (Adj).
4.23. Mixed air temperature - Measure air temperature
in °F.
4.24. Filter pressure differential (analog input) -
Measure pressure drop through the filter in iwc.
4.25. Cooling/Heating valve position - Valve shall
modulate to maintain supply air temperature.
4.26. Low limit temperature (freeze stat) - When the
heating coil discharge air temperature is below 35°F (Adj), disable the fans, close the outside and relief air dampers, open return air dampers and open heating valve.
5. Air Handling Units – Single Zone
5.1. Space temperature - Thermostat shall be installed
on an interior wall in the most central location. If a central location is not available, install thermostat near the return air diffuser for the space. Temperature set-points shall follow a facility specific occupancy schedule. Temperature set-points for occupied and unoccupied modes shall follow the most recent AFSOC Energy Policy.
5.2. Supply fan on/off - Fan shall operate three
different ways depending on the fan mode chosen on the front end software. (1) Fan shall run continuously. (2) Fan shall cycle with a call for heating. (3) Fan shall cycle with a call for heating or cooling.
5.3. Supply fan status (< 5HP) - Measure current
through the motor in amps.
5.4. Supply fan status (≥ 5HP) - Detect current
through the motor with a current switch.
5.5. Supply fan speed (≥ 5HP) - In “Continuous” mode
the fan shall reduce speed proportionally as the call for heating/cooling decreases. When the zone temperature is satisfied, the fan speed shall be at the motor manufacturer’s recommended minimum speed. In “Cycle Heating Only” mode the AHU shall shut down when the zone temperature is satisfied during heating only.
During cooling, the fan shall modulate speed as described in “Continuous” mode. In “Cycle Heating and Cooling” mode, the AHU shall shut down when the zone temperature is satisfied during heating and cooling.
5.6. Supply air temperature - Measure air temperature
in °F. A cooling reset schedule shall be programmed to provide 55°F (Adj) air when the cooling signal is 100% and provide 65°F (Adj) air when the cooling signal is below 100%. A heating reset schedule shall be programmed to provide 90°F (Adj) air when the heating signal is 100% and provide 80°F (Adj) air when the heating signal is below 100%.
5.7. Supply air static pressure - Measure duct pressure
in iwc. The VFD (if equipped) shall maintain the specified set-point (Adj).
5.8. Supply air high limit static pressure - When duct
pressure exceeds 4 iwc (Adj), disable the AHU utilizing the freeze stat sequence.
5.9. Supply air flow - Measure flow rate in units of
CFM.
5.10. Supply air duct smoke (> 2000cfm) - When
smoke is detected, disable the AHU utilizing the freeze stat sequence.
5.11. Return fan on/off (if equipped with return fan) -
Fan shall be interlocked with the supply fan and cycle in the same way as the supply fan.
5.12. Return fan status (No VFD) - Measure current
through the motor in amps.
5.13. Return fan status (VFD) - Detect current through
the motor with a current switch.
5.14. Return fan speed (Supply fan > 5HP) - Fan speed
shall modulate to track the supply air fan speed at 50% (Adj). A minimum supply power shall be set according to motor’s manufacturer suggested requirements.
5.15. Return air temperature - Measure air
temperature in °F.
September 2014 Cannon Air Force Base Page 16
5.16. Return air duct smoke - When smoke is detected, disable the AHU utilizing the freeze stat sequence.
5.17. Return air damper position - Shall modulate
opposite of the outside air damper through linkage or additional actuator.
5.18. Return air flow - Measure flow rate in units of
CFM.
5.19. Return air CO2 - Measure the CO2 level in ppm.
5.20. Outside air damper position - Link damper
control with return air damper to open/close opposite of each other. Outside air and return air damper positions shall modulate to maintain the supply air set-point in cooling mode only.
Two modes shall be available as described below.
5.20.1. Auto mode: 100% outside air shall be
enabled when the outside air temperature is less than the return air temperature. During unfavorable outside air conditions the outside air shall modulate to maintain a set CO2 differential (Adj) between the return and outside air.
5.20.2. Manual mode: 100% outside air shall be
enabled when the outside air temperature is less than OAT Manual High SP (Adj). During unfavorable outside air conditions the outside air damper shall open to the set minimum position (Adj).
5.21. Outside air flow - Measure flow rate in units of
CFM.
5.22. Outside air CO2 - Measure the CO2 level in ppm.
5.23. Relief air damper position - Damper shall
modulate to maintain the specified building pressure set-point (Adj).
5.24. Mixed air temperature - Measure air temperature
in °F.
5.25. Filter pressure differential (analog input) -
Measure pressure drop through the filter in iwc.
5.26. Cooling/Heating valve control - Valve shall
modulate to maintain supply air temperature.
5.27. Low limit temperature (freeze stat) - When the
heating coil discharge air temperature is below 35°F (Adj), disable the fans, close the outside and relief air dampers, open return air dampers and open heating valve.
6. Air Handling Units - Three Deck Multizone
6.1. Space temperature - Thermostat shall be installed
on an interior wall in the most central location in each zone. If a central location is not available, install thermostat near the return air diffuser for the space. Temperature set-points shall follow a facility specific occupancy schedule. Temperature set-points for occupied and unoccupied modes shall follow the most recent AFSOC Energy Policy.
6.2. Supply fan on/off - Fan shall be on unless disable
due to alarm status of occupancy schedule.
6.3. Supply fan status (< 5HP) - Measure current
through the motor in amps.
6.4. Supply fan status (≥ 5HP) - Detect current
through the motor with a current switch.
6.5. Supply fan speed (≥ 5HP) - Fan speed shall
modulate to maintain the specified fan box pressure. A minimum supply power shall be set according to motor’s manufacturer suggested requirements.
6.6. Supply air temperature - Measure air temperature
in °F for each zone. A cooling reset schedule shall be programmed to provide 55°F air when the highest cooling signal is 100% and provide 65°F air when the highest cooling signal is below 100%. A heating reset schedule shall be programmed to provide 90°F air when the highest heating signal is 100% and provide 80°F air when the highest heating signal is below 100%.
6.7. Cold deck air temperature - Measure air
temperature leaving the cooling coil in °F.
6.8. Hot deck air temperature - Measure air
temperature leaving the heating coil in °F.
6.9. Bypass deck air temperature - Measure air
temperature in °F.
6.10. Supply air static pressure - Measure static
pressure inside the fan box in iwc.
6.11. Supply air high limit static pressure - When duct
pressure exceeds 4 iwc (Adj), disable the AHU utilizing the freeze stat sequence.
6.12. Supply air flow - Measure flow rate in CFM for
each zone.
6.13. Supply air duct smoke - When smoke is detected, disable the AHU utilizing the freeze stat sequence.
6.14. Return fan on/off (if equipped with return fan) -
Fan shall be interlocked with the supply fan and cycle in the same way as the supply fan.
Page 17 Cannon Air Force Base September 2014
6.15. Return fan status (No VFD) - Measure current
through the motor in amps.
6.16. Return fan status (VFD) - Detect current through
the motor with a current switch.
6.17. Return fan speed (Supply fan > 5HP) - Fan speed
shall modulate to track the supply air fan speed at 50% (Adj). A minimum supply power shall be set according to motor’s manufacturer suggested requirements.
6.18. Return air temperature - Measure air
temperature in °F.
6.19. Return air duct smoke - When smoke is detected, disable the AHU utilizing the freeze stat sequence.
6.20. Return air damper position - Shall modulate
opposite of the outside air damper through linkage or additional actuator.
6.21. Return air flow - Measure flow rate in units of
CFM.
6.22. Return air CO2 - Measure the CO2 level in ppm.
6.23. Outside air damper position - Link damper
control with return air damper to open/close opposite of each other. Outside air and return air damper positions shall modulate to maintain the supply air set-point in cooling mode only.
Two modes shall be available as described below.
6.23.1. Auto mode: 100% outside air shall be
enabled when the outside air temperature is less than the return air temperature. During unfavorable outside air conditions the outside air shall modulate to maintain a set CO2 differential (Adj) between the return and outside air.
6.23.2. Manual mode: 100% outside air shall be
enabled when the outside air temperature is less than OAT Manual High SP (Adj). During unfavorable outside air conditions the outside air damper shall open to the set minimum position (Adj).
6.24. Outside air flow - Measure flow rate in units of
CFM.
6.25. Outside air CO2 - Measure the CO2 level in ppm.
6.26. Relief air damper position - Damper shall
modulate to maintain the specified building pressure set-point (Adj).
6.27. Mixed air temperature - Measure air temperature
in °F.
6.28. Filter pressure differential (analog input) -
Measure pressure drop through the filter in iwc.
6.29. Bypass damper position (if equipped) - Damper
shall modulate with the outside air damper.
6.30. Multizone damper position - shall modulate per
zone to ensure the cold deck damper is 0% open when a call for heating is present and the hot deck damper is 0% open when a call for cooling is present.
6.31. Cooling/Heating valve control - Valve shall
modulate to maintain cold/hot deck air temperature setpoint.
6.32. Low limit temperature (freeze stat) - When the
heating coil discharge air temperature is below 35°F (Adj), disable the fans, close the outside and relief air dampers, open return air dampers and open heating valve.
7. Air Handling Units - Two Deck Multizone
7.1. Space temperature - Thermostat shall be installed
on an interior wall in the most central location in each zone. If a central location is not available, install thermostat near the return air diffuser for the space. Temperature set-points shall follow a facility specific occupancy schedule. Temperature set-points for occupied and unoccupied modes shall follow the most recent AFSOC Energy Policy.
7.2. Supply fan on/off - Fan shall be on unless disable
due to alarm status of occupancy schedule.
7.3. Supply fan status (< 5HP) - Measure current
through the motor in amps.
7.4. Supply fan status (≥ 5HP) - Detect current
through the motor with a current switch.
7.5. Supply fan speed (≥ 5HP) - Fan speed shall
modulate to maintain the specified fan box pressure. A minimum supply power shall be set according to motor’s manufacturer suggested requirements.
7.6. Supply air temperature - Measure air temperature
in °F for each zone. A cooling reset schedule shall be programmed to provide 55°F air when the highest cooling signal is 100% and provide 65°F air when the highest cooling signal is below 100%. A heating reset schedule shall be programmed to provide 90°F air when the highest heating signal is 100% and provide 80°F air when the highest heating signal is below 100%.
September 2014 Cannon Air Force Base Page 18
7.7. Cold deck air temperature - Measure air
temperature leaving the cooling coil in °F.
7.1. Hot deck air temperature - Measure air
temperature leaving the heating coil in °F.
7.2. Supply air static pressure - Measure static
pressure inside the fan box in iwc.
7.3. Supply air high limit static pressure - When duct
pressure exceeds 4 iwc (Adj), disable the AHU utilizing the freeze stat sequence.
7.4. Supply air flow - Measure flow rate in CFM for
each zone.
7.5. Supply air duct smoke - When smoke is detected, disable the AHU utilizing the freeze stat sequence.
7.6. Return fan on/off (if equipped with return fan) -
Fan shall be interlocked with the supply fan and cycle in the same way as the supply fan.
7.7. Return fan status (No VFD) - Measure current
through the motor in amps.
7.8. Return fan status (VFD) - Detect current through
the motor with a current switch.
7.9. Return fan speed (Supply fan > 5HP) - Fan speed
shall modulate to track the supply air fan speed at 50% (Adj). A minimum supply power shall be set according to motor’s manufacturer suggested requirements.
7.10. Return air temperature - Measure air
temperature in °F.
7.11. Return air duct smoke - When smoke is detected, disable the AHU utilizing the freeze stat sequence.
7.12. Return air damper position - Shall modulate
opposite of the outside air damper through linkage or additional actuator.
7.13. Return air flow - Measure measured air flow
through return air duct in unit of CFM.
7.14. Return air CO2 - Measure the CO2 level in ppm.
7.15. Outside air damper position - Link damper
control with return air damper to open/close opposite of each other. Outside air and return air damper positions shall modulate to maintain the supply air set-point in cooling mode only.
Two modes shall be available as described below.
7.15.1. Auto mode: 100% outside air shall be
enabled when the outside air temperature is less than the return air temperature. During unfavorable outside air conditions the outside air shall modulate to maintain a set CO2 differential (Adj) between the return and outside air.
7.15.2. Manual mode: 100% outside air shall be
enabled when the outside air temperature is less than OAT Manual High SP (Adj). During unfavorable outside air conditions the outside air damper shall open to the set minimum position (Adj).
7.16. Outside air damper status - Measure damper
position percent provided by the feedback signal.
7.17. Outside air flow rate - Measure measured air flow
through outside air duct in units of CFM.
7.18. Outside air CO2 - Measure the CO2 level in ppm.
7.19. Relief air damper position - Damper shall
modulate to maintain the specified building pressure set-point (Adj).
7.20. Mixed air temperature - Measure air temperature
in °F.
7.21. Filter pressure differential (analog input) -
Measure pressure drop through the filter in iwc.
7.22. Multizone damper position - shall modulate
cold/hot deck dampers per zone to maintain zone supply air temperature.
7.23. Cooling/Heating valve control - Valve shall
modulate to maintain cold/hot deck air temperature setpoint.
7.24. Low limit temperature (freeze stat) - When the
heating coil discharge air temperature is below 35°F (Adj), disable the fans, close the outside and relief air dampers, open return air dampers and open heating valve.
8. Package A/C Units – Gas Heater
8.1. Space temperature - Thermostat shall be installed
on an interior wall in the most central location. If a central location is not available, install thermostat near the return air diffuser for the space. Temperature set-points shall follow a facility specific occupancy schedule. Temperature set-points for occupied and unoccupied modes shall follow the most recent AFSOC Energy Policy.
8.2. Supply fan on/off - Fan shall operate three
different ways depending on the fan mode chosen on the front end software. (1) Fan shall run continuously. (2) Fan shall cycle with a call for heating. (3) Fan shall cycle with a call for heating or cooling.
8.3. Supply fan status (< 5HP) - Measure current
through the motor in amps.
Page 19 Cannon Air Force Base September 2014
8.4. Supply fan status (≥ 5HP) - Detect current
through the motor with a current switch.
8.5. Supply fan speed (≥ 5HP) - In “Continuous” mode
the fan shall reduce speed proportionally as the call for heating/cooling decreases. When the zone temperature is satisfied, the fan speed shall be at the motor manufacturer’s recommended minimum speed. In “Cycle Heating Only” mode the AHU shall shut down when the zone temperature is satisfied during heating only.
During cooling, the fan shall modulate speed as described in “Continuous” mode. In “Cycle Heating and Cooling” mode, the AHU shall shut down when the zone temperature is satisfied during heating and cooling.
8.6. Supply air temperature - Measure air temperature
in °F.
8.7. Supply air static pressure - Measure duct pressure
in iwc. The VFD (if equipped) shall maintain the specified set-point (Adj).
8.8. Supply air flow - Measure flow rate in units of
CFM.
8.9. Supply air duct smoke (> 2000cfm) - When
smoke is detected, disable the AHU utilizing the freeze stat sequence.
8.10. Supply air high limit static pressure - When duct
pressure exceeds 4 iwc (Adj), disable the AHU utilizing the freeze stat sequence.
8.11. Return fan on/off (if equipped with return fan) -
Fan shall be interlocked with the supply fan and cycle in the same way as the supply fan.
8.12. Return fan status (No VFD) - Measure current
through the motor in amps.
8.13. Return fan status (VFD) - Detect current through
the motor with a current switch.
8.14. Return fan speed (Supply fan > 5HP) - Fan speed
shall modulate to track the supply air fan speed at 50% (Adj). A minimum supply power shall be set according to motor’s manufacturer suggested requirements.
8.15. Return air temperature - Measure air
temperature in °F.
8.16. Return air duct smoke - When smoke is detected, disable the AHU utilizing the freeze stat sequence.
8.17. Return air damper postion - Shall modulate
opposite of the outside air damper through linkage or additional actuator.
8.18. Return air flow - Measure flow rate in units of
CFM.
8.19. Return air CO2 - Measure the CO2 level in ppm.
8.20. Outside air damper position - Link damper
control with return air damper to open/close opposite of each other. Outside air and return air damper positions shall modulate to maintain the supply air set-point in cooling mode only.
Two modes shall be available as described below.
8.20.1. Auto mode: 100% outside air shall be
enabled when the outside air temperature is less than the return air temperature. During unfavorable outside air conditions the outside air shall modulate to maintain a set CO2 differential (Adj) between the return and outside air.
8.20.2. Manual mode: 100% outside air shall be
enabled when the outside air temperature is less than OAT Manual High SP (Adj). During unfavorable outside air conditions the outside air damper shall open to the set minimum position (Adj).
8.21. Outside air flow - Measure flow rate in units of
CFM.
8.22. Outside air CO2 - Measure the CO2 level in ppm.
8.23. Relief air damper position - Damper shall
modulate to maintain the specified building pressure set-point (Adj).
8.24. Mixed air temperature - Measure air temperature
in °F.
8.25. Filter pressure differential (analog input) -
Measure pressure drop through the filter in iwc.
8.26. Condenser on/off - Monitor on/off condition.
8.27. Compressor status - Measure current through
each compressor in amps.
8.28. Heater on/off - Monitor on/off condition.
8.29. Low limit temperature (freeze stat) - When the
heating coil discharge air temperature is below 35°F (Adj), disable the fans, close the outside and relief air dampers, open return air dampers and open heating valve.
September 2014 Cannon Air Force Base Page 20
9. Dedicated Outdoor Air Units
9.1. Space temperature - Thermostat shall be installed
on an interior wall in the most central location. If a central location is not available, install thermostat near the return air diffuser for the space. Temperature set-points shall follow a facility specific occupancy schedule. Temperature set-points for occupied and unoccupied modes shall follow the most recent AFSOC Energy Policy.
9.2. Supply fan on/off - Fan shall operate three
different ways depending on the fan mode chosen on the front end software. (1) Fan shall run continuously. (2) Fan shall cycle with a call for heating. (3) Fan shall cycle with a call for heating or cooling.
9.3. Supply fan status (< 5HP) - Measure current
through the motor in amps.
9.4. Supply fan status (≥ 5HP) - Detect current
through the motor with a current switch.
9.5. Supply fan speed (≥ 5HP) - In “Continuous” mode
the fan shall reduce speed proportionally as the call for heating/cooling decreases. When the zone temperature is satisfied, the fan speed shall be at the motor manufacturer’s recommended minimum speed. In “Cycle Heating” mode the AHU shall shut down when the zone temperature is satisfied during heating only. During cooling, the fan shall modulate speed as described in “Continuous” mode. In “Cycle Heating and Cooling” mode, the AHU shall shut down when the zone temperature is satisfied during heating and cooling.
9.6. Supply air temperature - Measure air temperature
in °F. A cooling reset schedule shall be programmed to provide 55°F (Adj) air when the cooling signal is 100% and provide 65°F (Adj) air when the cooling signal is below 100%. A heating reset schedule shall be programmed to provide 90°F (Adj) air when the heating signal is 100% and provide 80°F (Adj) air when the heating signal is below 100%.
9.7. Supply air static pressure - Measure duct pressure
in iwc. The VFD (if equipped) shall maintain the specified set-point (Adj).
9.8. Supply air high limit static pressure - When duct
pressure exceeds 4 iwc (Adj), disable the AHU utilizing the freeze stat sequence.
9.9. Supply air flow - Measure flow rate in units of
CFM.
9.10. Supply air duct smoke (> 2000cfm) - When
smoke is detected, disable the AHU utilizing the freeze stat sequence.
9.11. Outside air damper position - Outside air shall
modulate with supply fan speed.
9.12. Outside air flow - Measure flow rate in units of
CFM.
9.13. Relief air damper position - Damper shall
modulate to maintain the specified building pressure set-point (Adj).
9.14. Filter pressure differential (analog input) -
Measure pressure drop through the filter in iwc.
9.15. Cooling/Heating valve position - Valve shall
modulate to maintain supply air temperature.
9.16. Low limit temperature (freeze stat) - When the
heating coil discharge air temperature is below 35°F (Adj), disable the fans, close the outside and relief air dampers, open return air dampers and open heating valve.
10. Terminal Units – Fan Coil
10.1. Space temperature - Thermostat shall be installed
on an interior wall in the most central location. If a central location is not available, install thermostat near the return air diffuser for the space. Temperature set-points shall follow a facility specific occupancy schedule. Temperature set-points for occupied and unoccupied modes shall follow the most recent AFSOC Energy Policy.
10.2. Supply fan on/off - Fan shall operate three
different ways depending on the fan mode chosen on the front end software. (1) Fan shall run continuously. (2) Fan shall cycle with a call for heating. (3) Fan shall cycle with a call for heating or cooling.
10.3. Supply fan status - Measure current through the
motor in amps.
10.4. Supply air temperature - Measure air temperature
in °F. A cooling reset schedule shall be programmed to provide 55°F (Adj) air when the cooling signal is 100% and provide 65°F (Adj) air when the cooling signal is below 100%. A heating reset schedule shall be programmed to provide 90°F (Adj) air when the heating signal is 100% and provide 80°F (Adj) air when the heating signal is below 100%.
Page 21 Cannon Air Force Base September 2014
10.5. Supply air duct smoke (> 2000cfm) - When
smoke is detected, disable the AHU utilizing the freeze stat sequence.
10.6. Return air duct smoke - When smoke is detected, disable the AHU utilizing the freeze stat sequence.
10.7. Filter pressure differential (analog input) -
Measure pressure drop through the filter in iwc.
10.8. Water cooling (add)
10.8.1. Cooling valve position - Valve shall
modulate to maintain supply air temperature.
10.9. DX cooling (add)
10.9.1. Condenser on/off - Monitor on/off
condition.
10.9.2. Compressor status - Measure current
through each compressor in amps.
10.10. Water heating (add)
10.10.1. Heating valve position - Valve shall
modulate to maintain supply air temperature.
10.11. Gas heating (add)
10.11.1. Furnace on/off - furnace shall cycle to
maintain supply air temperature.
10.12. Economizer (add)
10.12.1. Supply air flow - Measure flow rate in
units of CFM.
10.12.2. Return air temperature - Measure air
temperature in °F.
10.12.3. Return air damper control - Shall
modulate opposite of the outside air damper through linkage or additional actuator.
10.12.4. Return air CO2 - Measure the CO2 level
in ppm.
10.12.5. Outside air damper position - Link
damper control with return air damper to open/close opposite of each other. Outside air and return air damper positions shall modulate to maintain the supply air set-point in cooling mode only. Two modes shall be available as described below.
10.12.5.1. Auto mode: 100% outside air
shall be enabled when the outside air temperature is less than the return air temperature. During unfavorable outside air conditions the outside air shall modulate to maintain a set CO2 differential (Adj) between the return and outside air.
10.12.5.2. Manual mode: 100% outside air
shall be enabled when the outside air temperature is less than OAT Manual High SP (Adj). During unfavorable outside air conditions the outside air damper shall open to the set minimum position (Adj).
10.12.6. Outside air flow - Measure flow rate in
units of CFM.
10.12.7. Outside air CO2 - Measure the CO2 level
in ppm.
10.12.8. Relief air damper position - Damper shall
modulate to maintain the specified building pressure set-point (Adj).
10.12.9. Mixed air temperature - Measure air
temperature in °F.
10.13. Humidity control (add)
10.13.1. Space relative humidity - Measure space
humidity percentage.
10.13.2. Supply air relative humidity - Measure
supply air humidity percentage.
10.13.3. Humidifier signal - Humidifier shall
modulate to maintain space humidity setpoint (Adj).
11. Terminal Units – Fan Powered Variable Air Volume
11.1. Space temperature - Thermostat shall be installed
on an interior wall in the most central location. If a central location is not available, install thermostat near the return air diffuser for the space. Temperature set-points shall follow a facility specific occupancy schedule. Temperature set-points for occupied and unoccupied modes shall follow the most recent AFSOC Energy Policy.
11.2. Discharge air temperature - Measure air
temperature in °F.
11.3. Discharge air flow - Measure air flow in CFM.
11.4. Damper position- Modulate between the
minimum set-point and 100% open to maintain space temperature. During heat mode, damper shall be 100% closed.
11.5. Reheat valve position - Valve shall open upon a
call for heating.
11.6. Fan on/off - Fan shall be enabled with a call for
heating.
11.7. Fan status - Detect current through the motor
with a current switch.
September 2014 Cannon Air Force Base Page 22
12. Terminal Units – Variable Air Volume
12.1. Space temperature - Thermostat shall be installed
on an interior wall in the most central location. If a central location is not available, install thermostat near the return air diffuser for the space. Temperature set-points shall follow a facility specific occupancy schedule. Temperature set-points for occupied and unoccupied modes shall follow the most recent AFSOC Energy Policy.
12.2. Discharge air temperature - Measure air
temperature in °F.
12.3. Discharge air flow - Measure air flow in CFM.
12.4. Damper position - Modulate between the
minimum set-point and 100% open to maintain space temperature.
12.5. Reheat valve position - Valve shall open upon a
call for heating.
13. Boiler
13.1. Boiler on/off - The boiler shall be enabled at 60°F
(Adj) and below.
13.2. Supply water temperature - Measure water
temperature supplying the heating coils in °F. A hot water reset schedule shall be programmed to provide 180°F (Adj) water when outside air temperatures are 32°F (Adj) and below. When outside air temperatures are between 32°F (Adj) and 60°F (Adj) the hot water supply temperature shall be reset to 90°F (Adj).
13.3. Differential pressure across pump - Measure the
differential pressure between supply and return.
13.4. Return water temperature - Measure water
temperature in °F going into the pump.
13.5. Water mixing valve position - Valve shall
modulate to maintain the supply water temperature as required by the reset schedule.
13.6. Pump on/off - Pump shall enable when boiler is
operating to circulate hot water through either the heating coils or the bypass.
13.7. Pump status (< 5HP) - Measure current through
the motor in amps.
13.8. Pump status - (≥ 5HP) - Detect current through
the motor with a current switch.
13.9. Pump speed (≥ 5HP) - Modulate pump speed to
maintain the design pressure differential between the supply side and return side of the pump. If a VFD is used, no balancing valve is required.
13.10. Water flow - Measure water flow rate in GPM.
13.11. Boiler inlet temperature - Measure water
temperature in °F going into the boiler.
13.12. Boiler discharge temperature - Measure water
temperature in °F going out the boiler.
13.13. Boiler water level - Measure water level of the
boiler if equipped with a water holding chamber.
13.14. Flame indicator - Detect presence of a flame.
14. Chiller
14.1. Chiller on/off - The chiller shall be enabled when
the outside air temperature is above 60°F (Adj).
14.2. Compressor status - Measure current through
each compressor.
14.3. Isolation valve position - If multiple chillers are
used, open/close isolation valve for the active/inactive chiller.
14.4. Supply water temperature - Measure water
temperature supplying the cooling coils in °F.
14.5. Differential pressure across pump - Measure the
differential pressure between supply and return.
14.6. Return water temperature - Display water
temperature in °F.
14.7. Water mixing valve position - Valve shall
modulate to maintain the supply water temperature as required by the reset schedule.
14.8. Pump on/off - Pump shall enable when chiller is
operating to circulate chilled water through either the cooling coils or the bypass. The system shall monitor the temperature sensors for the chiller discharge, chiller return, CHWS (in mechanical room), and CHWR (in mechanical room) and if any one temperature sensor reads 33°F or below, the system shall cycle the chilled water pumps.
14.9. Pump status (< 5HP) - Measure current through
the motor in amps.
14.10. Pump status - (≥ 5HP) - Detect current through
the motor with a current switch.
14.11. Pump speed (≥ 5HP) - Modulate pump speed to
maintain the design pressure differential between the supply side and return side of the pump. If a VFD is used, no balancing valve is required.
14.12. Water flow - Measure water flow rate in GPM.
14.13. Chiller inlet temperature - Measure water
temperature in °F going into the chiller.
14.14. Chiller discharge temperature - Measure water
temperature in °F going out the chiller.
14.15. Chiller interface - Display available information
gathered from the onboard controller.
Page 23 Cannon Air Force Base September 2014
15. Condensing Unit
15.1. Compressor on/off - Monitor on/off condition of
each compressor.
15.2. Compressor status - Measure current through
each compressor in amps.
16. Domestic HW System and Recirculating Pump Unit (monitor only)
16.1. Pump on/off - Display bright green/red button if
pump motor is on/off.
16.2. Pump status - Display bright green/red button if
the current sensor does/does not detect current running through the pump motor.
16.3. Return water temperature - Display measured
water…
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