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Hospital Commissioning Case Study

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Presentation on theme: "Hospital Commissioning Case Study"— Presentation transcript:

1 Hospital Commissioning Case Study
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 Review the energy model Design reviews at 100% DDs and 100% CDs
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 Electrical Distribution Essential Electrical System (Emergency Power)
Commissioning Scope Mechanical Systems Domestic Hot Water Fire Protection Fire Alarm Electrical Distribution Essential Electrical System (Emergency Power) Elevators Lighting Controls Building Envelope

7 Multistack chiller (1,050 T) uses ground water loop when needed
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 42º. (Strainers)

18 OR pressure control incorrect (setpoints incorrect)
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 SAT reset based on dew point not programmed
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 Graphics incomplete and/or inaccurate
Findings - BAS Graphics incomplete and/or inaccurate

23 No time of use schedule programmed for boilers (3 total, 1 stand-by)
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 Controls associated with OR AHUs and OR space controls
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 heat flow Control airflow Control vapor flow Control rain Control groundwater Control light and solar radiation Control noise and vibration Control insects, rodents, and vermin Control fire Provide strength and rigidity Be durable

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 Pa Slight positive pressure Intent is to have continuous air, water, and thermal protection

31 Owner’s Project Requirements Two Design Reviews
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

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