Revised_SOW.pdf

CCRU BAS Control Upgrades Summary of Work 01 11 00 (rev Aug 2017)

1. This work will provide for several Building Automation System control modifications, including programming and overrides, as well as mechanical modifications for the USDA Cereal Crops Research Unit in Madison, WI.

2. General provisions of the Contract, listed below, apply to this Section.

A. Section 01 01 00 General Specification B. Section 01 33 00 Submittal Procedures and 01 78 00 Closeout Submittals C. Section 01 45 00.10 20 Quality Control for Minor Construction for three-phase quality control plan requirements D. Section 23 00 00 Air Supply, Distribution, Ventilation and Exhaust Systems E. Section 23 03 00.00 20 Basic Mechanical Materials and Methods F. Section 23 07 00 Thermal Insulation for Mechanical Systems G. Section 23 09 00 Instrumentation and Control for HVAC: Submittal execution requirements for work under this section H. Section 23 09 33.00 40 Electric and Electronic Control System for HVAC I. Section 26 05 00.00 40 Common Work Results for Electrical J. Section 26 20 00 Interior Distribution System K. Section 26 29 23: Variable Frequency Drive Systems under 600 Volts

3. All work shall conform to the following Codes and Standards, as applicable:

A. National Fire Protection Association (NFPA) Standards, latest edition.

B. National Electric Code (NEC) and applicable local Electric Code, latest edition.

C. Underwriters Laboratories (UL) listing and labels, latest edition.

D. National Electric Manufacturer’s Association (NEMA), latest edition.

E. American Society of Mechanical Engineers (ASME), latest edition.

F. American Society of Heating, Refrigerating and Air Conditioning Engineers

(ASHRAE), latest edition.

G. Air Movement and Control Association (AMCA), latest edition.

H. Institute of Electrical and Electronic Engineers (IEEE), latest edition.

I. American Society for Testing and Materials (ASTM), latest edition.

J. ARS Facilities Design Standards 242.1

4. All work must be fully compatible with and integrated into the existing Siemens Building Control

System. For the controls portion of this work, the Contractor is required to be a Siemens certified representative.

5. Scope of Work

A. The Contractor shall provide all necessary material, equipment, tools, labor and supervision necessary to complete the following BAS control system corrections and mechanical renovations listed below at the Cereal Crops Research Unit in Madison, WI as noted on the 2013 Recommissioning Study Action Item List. The items listed below shall consist of the base bid.

i. Evaluate the location of the existing thermostat for laboratory #1 and (1) determine a more suitable location that is not susceptible to the corrosive nature of the chemicals in use, and (2) replace the thermostat with a new thermostat in the new location. Location must first be approved by the USDA.

Remove the existing thermostat and patch/paint wall.

ii. Verify that the BAS indication of temperature values are consistent with what each thermostat (51 thermostats) is reading. Troubleshoot and correct any discrepancies.

iii. Provide removable insulation jackets for both (2) supply duct airflow stations.

iv. Verify the airflow offsets for CVS and CVE 148-1 are as specified in the original construction documents (660 cfm exhaust and 510 cfm supply). Edit control program as necessary to ensure the correct offsets are met, resulting in a negative pressurized space.

v. Map the points for FCU’s #5, 6, 7, 8, 9 and 10 to show proof of run on the GUI (points are currently wired, but are not currently displayed at the GUI).

Create a separate graphical screen for these FCU’s.

vi. Evaluate the radiant heater control valve in Greenhouse #3 for full functionality. Replace valve as necessary. Valve currently fully closes, but only goes approximately 50% open.

vii. Review the location of the OAT sensor located in the northwest entry and (1) calibrate sensor and (2) recommend and move to a more suitable location for the sensor that is not affected by the setting sun. USDA to approve location proposed.

viii. During the BAS unoccupied mode, slow down RF-1 to roughly match the supply fan airflow of AHU-1.

ix. Set both of the supply airflow station’s calibration coefficients to 1.0 for AHU- 1.

x. Install a high humidity limit switch on the existing humidifier and integrate with the humidifier actuator. Set such that when the OAT is below 40degF, humidifier is active and when supply air relative humidity is above 85%, humidifier valve closes until discharge humidity drops. Ensure a BAS alarm is initiated if High and Low humidity level (60% RH and 30% RH respectively) readings are above such values for more than 5 minutes.

xi. For RF-1, 2 and 3, integrate the H-O-A switch with the BAS as intended in original building construction documents (when fan is off the “auto” mode for more than 5 minutes, the BAS should initiate an alarm). Install current transformers to integrate with the BAS (wiring has already been run for the switches).

xii. For Heating Pumps #4, 5, 6, and 7, integrate the H-O-A alarm switch with the BAS as intended in the original construction documents (when pump is off the “auto” mode for more than 5 minutes, the BAS should initiate an alarm).

Install current transformers to integrate with the BAS (wiring has already been run for the switches).

xiii. Implement revisions to the unoccupied control program to maximize energy savings and properly maintain adequate ventilation and space temperature control during unoccupied hours. Revise occupied mode to begin at 5:30am and extend until 5:30pm. Laboratory airflow requirements should be adjusted from 8 air changes per hour to 4 air changes per hour during unoccupied hours. Goal here is to save as much energy as possible yet still maintaining air exchanges for unoccupied hours.

xiv. Reinstall relief damper actuator on RF-3 and integrate with BAS such that when the return fan is off, the motorized damper is shut.

xv. Set the calibration schedule for all VAV and CV units to occur during the unoccupied time period at 3:00am.

xvi. Release all VAV and CV units from overridden occupied setting to allow them to follow respective “occupied/unoccupied” schedule. Work with location to potentially look at unoccupied settings to determine if temperature set-backs are too aggressive and need to be modified.

xvii. Verify why the following airflow control setpoints were overridden and release back to setpoint as necessary.

a. VVE114-2

b. CVS120-1

c. CVS120-2

d. CVS127-1

e. CVS128-1

f. CVS129-1

g. CVS130-1

h. CVS131-1

i. CVS132-1

j. CVS133-1

k. CVS134-1

l. CVS135-1

m. VVS142-1

n. CVS149-1

o. CVE151-1

p. CVS152-1

q. CVS159-1

r. CVE163-1

s. CVS166-1

t. CVE166-1

xviii. Verify overridden “other supply’, “VOL Dif STPT” and “other exhaust” setpoints and determine if a potential problem (i.e. loss of power) will reset overridden values back to some different default value or the overridden set point. Set values back to original design setpoints. Specific points to be verified include:

a. CVS121-1

b. VVE121-1

c. CVS122-1

d. VVE122-1

e. VVE123-1

f. CVS124-1

g. VVE124-3

h. CVE125-2

i. CVS126-1

j. VVE126-1

xix. Add the cooling min/max (0/660 CFM) airflow setpoints to the Graphical User Interface for VVE122-2

xx. For CVS123-1, verify overridden “Other supply”, “GEX FLO STPT”, “Dif STPT”, and “Other exhaust” setpoints and determine if a potential problem (i.e. loss of power) will reset overridden values back to some different default value or the overridden set point. Set values back to original design setpoints.

xxi. For VVE123-3, VVE124-1, VVE124-2, VVE125-3, VVE126-2, release “Alarm Acknowledge” setpoint that is currently overridden “off”.

xxii. For VVE124-4, add the flow setpoint to the Graphical User Interface.

xxiii. For CVS125-1, verify overridden “Other supply”, “GEX MAX”, “GEX

MIN”, “Vol Dif STPT” and “Other exhaust” setpoints and determine if a potential problem (i.e. loss of power) will reset overridden values back to some different default value or the overridden set point.

xxiv. For CVS168-1 and CVS169-1, reset the room pressurization controller to “active.” Verify the rooms operate at their designed negative pressure airflow settings as shown in the original construction documents.

xxv. Replace the pressure gauge snubbers on hydronic pumps PM-4, PM-5, PM- 6 and PM-7.

xxvi. For FCU#5, #6, #7, #8, #9, #10, program a 1 degree F temperature deadband into the PPCL.

B. As part of Bid Option #1, contractor shall provide all tools, labor, material, equipment and supervision necessary to complete the System Enhancements as listed below and as noted on the 2013 Recommissioning Study Action Item List.

i. Disconnect Controls for the 3 greenhouse’s vents.

ii. Room 149-install constant volume exhaust box (CVE149-1). Tie into RF-2 ductwork. Set control program to match supply airflow (50-100CFM).

Increase maximum supply air CFM to maintain temperature setpoint.

iii. Install return air grille, AD-7 (0-150CFM), Anemostat x30 or equal in vestibule

160. Tie into RF-1.

iv. Review the location of the existing thermostat in room 134. Determine a more suitable location for the thermostat within the existing room that is not blocked by laboratory equipment and relocate existing thermostat. Alternate location must first be approved by USDA. Patch and paint wall as necessary.

v. Install a dirty filter alarm switch with integral alarm on AHU-1 to provide notification of required filter change.

vi. Disconnect existing AHU-1 humidifier condensate return piping. Re-route piping to existing condensate return pump (CRU-1).

vii. Install damper in return ductwork and set BAS controls such that when RF-2 is shutdown, the return air ductwork is isolated from outside air.

viii. Integrate a low and high static alarm for RF-2 and RF-3 static pressure sensors to alarm when duct static pressure falls below or above setpoints.

ix. Implement a program that controls the exhaust fans (EF-1 and EF-2) in which there is one lead fan, one lag fan, and one standby fan. The new static pressure setpoint for EF-1 and EF-2 will be - 2.85" H2O. When the one lead fan cannot keep up with the load demand, the lag fan will start and the bypass dampers will operate in parallel with the lead fan bypass dampers. With both the lead and lag fans operating, once the load drops to the point where the bypass dampers are 100% open, the lag fan will be shut down again. As before, the standby fan shall be put in place of either the lead or lag fan in the event of a fan failure. During unoccupied times only the lead fan will operate.

x. For CVS boxes (total #boxes = 33), reset “unoccupied” setpoint temperature to supply 55 deg supply air.

xi. Install current transformer integral to the biological safety hood’s fan motor (Room 122) so that when the hood is in use, VVE122-2 will go into operating mode. Update the control sequence to mimic CVE162-1 and add the cooling min/max airflow setpoints (0 to 660 CFM) to the GUI.

xii. Install a wall switch integrated with VVE124-4 near the existing canopy hood in Room 124 so that when the canopy hood is in use, the unit will go to max design air flow (500CFM). Coordinate final location of switch with location monitor. Update BAS graphic to mimic that of CVE162-1.

xiii. Insulate reheat coil u-bends on VVS152-1.

xiv. Replace existing CVS159-1 with a new VVS159-1 (Basis of Design:

Anemostat EZT)

xv. Relocate the new VVS159-1 to ensure it is not blocking the return air path to

RF-1. Modify piping and ductwork as necessary.

xvi. Install pressure differential sensors on reheat loop circulating pumps #6 and

#7.

xvii. Add a page to the BAS GUI and map all of the fan coil units to display current operating conditions (total of 10 fan coil units).

6. Field verification and testing: Provide verification that all corrections have been made and the system is operating per requirements of the Statement of Work. Testing must be done in the presence of the USDA location representative. Report any deficiencies to the USDA.

7. Provide hands-on demonstration of all new programmed features and training for the system.

Contractor to provide 8 hours of hands-on one on one training to the location representative.

8. Remove all components being replaced.

9. Close coordination with the Location is required to prevent unscheduled outages or disruptions that would impact the occupants.

10. Provide submittals on drawings, materials, equipment, and testing in accordance with UFGS 01

33 00 Submittal Procedures.

11. Provide Operation and Maintenance Data in accordance with UFGS 01 78 23 Operation and Maintenance Data. Provide As-Built documentation in accordance with UFGS 01 78 00 Closeout submittals.

12. Technical Support: The control system manufacturer or authorized representative will provide telephone technical support at no additional cost to the Government for a minimum of one year from project acceptance, will be furnished by experienced service technicians, and will be available during normal weekday working hours.

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