Hospital Commissioning Case Study

1. Presentation Hospital Commissioning Case Study WellStar Paulding Hospital Hiram, Georgia Rusty Ross, PE, CxA – SSRCx Rick Ziegler, PE – SSRCx Michael Paul - WellStar

2. The Project • $125 Million Replacement Hospital • 295,000 SQFT, Eight Floors • 56 beds, expandable to 112 beds (6th & 7th floors shelled) • 40 ER exam rooms • 4 surgical suites • First Patient – March 28, 2014

3. Commissioning Scope • Review the energy model • Design reviews at 100% DDs and 100% CDs • Cx Specifications

4. Commissioning Scope • Cx Plan • Shop Drawing Review • Prepare Installation Checklists monitor subs execution of these checklists • Prepare Functional Test Procedures, direct execution, document findings

5. Commissioning Scope • Review: • T&B report • O&Ms • O&M staff training • Final Report • Opposed Season Testing • Warranty Meeting

6. Commissioning Scope • Mechanical Systems • Domestic Hot Water • Fire Protection • Fire Alarm • Electrical Distribution • Essential Electrical System (Emergency Power) • Elevators • Lighting Controls • Building Envelope

7. Mechanical systems • Multistack chiller (1,050 T) uses ground water loop when needed • Full Load testing to be conducted summer 2014 • Primary mode is simultaneous heating and cooling

8. Mechanical systems • Desiccant AHUs serve Surgery • DOAS units serve multiple AHU systems • Air valves on supply and return in OR systems • 412 Tons of air-cooled Chillers serve DOAS units

9. Energy Model Review • Energy Star Target Score: 94 • Model not updated for 100% CD design • Walls sections in model don’t match design • Insulation in roof in model different from design • Roof deck design (thickness) ≠ model

10. Energy Model Review • Thermal resistance of windows over estimated in the model • Sun shade sizing differ between mode and design • DOAS, AHU and exhaust fan power understated in model vs 100% CDs • AHU SAT reset schedule in the EM ≠ the design

11. Energy Model Review • Energy model over estimates unoccupied operating timeframe, thus under estimating energy usage

12. 95% CD Plan Review - Mechanical • No detail provided for piping propane (secondary fuel) to steam boilers

13. 95% CD Plan Review - Mechanical • No conditioned air in main electrical room • Plans did not indicate all isolation valves and flushing connections in Ground Loop system or at the Heat Pump Chiller • No SOO defined for atrium smoke evacuation function • No SOO for VAV boxes in kitchen tracking variable flow in range hood exhaust and dishwasher exhaust

14. 95% CD Plan Review - Mechanical • Incomplete or missing SOO for stairwell pressurization and elevator shaft smoke vent • Purging and pressure testing procedures for ground loop piping not defined in the specifications

15. 95% CD Plan Review - Electrical • No lighting controls SOO provided • No lighting controls specification included • Obstruction lighting control not defined, no photocell shown • Initiation of stairwell pressurization not defined • Electrical riser diagram, 4 dry type transformer shown fed from incorrect panels • 13 Panel schedules omitted from drawings • No IR scanning windows in some SWGR

16. 95% CD Plan Review - Electrical • BOD states emergency generators shall be bi-fuel. Specifications do not require this capability. • “Pole” requirements for shunt trip breakers serving loads under kitchen hoods not identified in panel schedule

17. Findings – HVAC Hydronics • CHW flow required for AHUs greater that CHW system output. (Strainers were loaded, had to be cleaned 3 times over course of FPTs) • Surgery Unit and AHU-Imaging not able to maintain DAT 55º with CHS @ 42º. (Strainers)

18. Findings - BAS • OR AHU SAT controlled by 3 factors. Design sequence changed to insure SAT did not rise above desired conditions. • SAT • Dew point control • Temperature reset in unoccupied mode • OR pressure control incorrect (setpoints incorrect) • OR pressure alarms did not alarm when rooms negative (programming) • Critical zone reset for SP setpoint not programmed for Surgery system

19. Findings - BAS • Surgery AHU Return Air SP safety tripped 5x when in un-occupied mode (added sensors) • DOAS and AHU SP control initially caused tripping of both systems on SP alarms (programming - rate of operation of control dampers) • HWPs and CHWPs did not operate in parallel (ramped individually in series) • Lag HWP and CHWP did not cycle off as load reduced

20. Findings - BAS • SAT reset based on dew point not programmed • Humidifier not able to control to setpoint (programming) • DOAS filter alarms not programmed • Isolation Room alarms failed to alarm (programming)

21. Findings - BAS • Isolation exhaust stand-by fan does not start when “lead” fan fails (N+1 programming)

22. Findings - BAS • Graphics incomplete and/or inaccurate

23. Findings - BAS • No time of use schedule programmed for boilers (3 total, 1 stand-by) • No communication between FO system and BAS • Sensors defective (MAT) • Domestic Booster pump alarms not programmed • Domestic Hot water alarms not programmed

24. Findings – Fire Alarm System/ Life Safety • Dry Pipe system annunciation did not identify area protected • Inoperable tamper switches on A/S control valves • Elevator recall programming incorrect

25. Findings – Lighting Controls • Occupancy sensors not programmed • Occupancy sensors would not time out • Lighting controls not programmed • Sensors blocked by OFE

26. Findings – Emergency Power • Load Demand control setpoint initially set too low (operated 2 gensets when load required 1) • Day Tank FO return pump did not operate when high level alarm activated (G1) • FO return pump not operable (G2) • Priority Loads and Load Demand functions operated correctly

27. MEP Lessons Learned • Ready to test • Despite scheduling, not ready to test • Programming incomplete, incorrect setpoints • Conflict between incomplete state and need to finish prior to occupancy • Controls associated with OR AHUs and OR space controls • Restart of AHUs on Emergency Power

28. Project Timeline

29. Enclosure Commissioning • Environmental Separation Control insects, rodents, and vermin Control fire Provide strength and rigidity Be durable • Control heat flow • Control airflow • Control vapor flow • Control rain • Control groundwater • Control light and solar radiation • Control noise and vibration

30. Owner’s Project Requirements • Design life of at least 50 years • No systemic water leaks, all leaks resolved prior to occupancy • Whole building air leakage rate of 0.1 cfm/sf @ 75 Pa • Slight positive pressure • Intent is to have continuous air, water, and thermal protection

31. Design Phase • Owner’s Project Requirements • Two Design Reviews • Specification Development • Review of Energy Model

32. Design Phase

33. Pre-Construction Phase • Submittal and shop drawing reviews • Mock-up construction and testing • Update to functional performance test plan

34. Mock-up

35. Mock-up

36. Mock-up

38. Mock-up Summary • Water leakage at window collar flashings • Masonry tie air leakage at one location • Whole mock-up air leakage testing pass • Significant air leakage at roof to wall interface • Curtain wall water leaks • Retesting and next steps

39. Construction Phase

40. Construction Phase

41. Construction Phase

42. Construction Phase

44. Questions