RCE #12-4181 April 30, 2013 Centennial School District William Tennent HS, Region 3 ES, Region 1 ES, Region 2 ES Commissioning Progress Report The Commissioning Technician returned to visit R2ES and R1ES during the month of March. The data loggers at R2ES were collected and the trends will be included in the final commissioning record with the other testing results. There were a few updates to the s for R1ES. The final commissioning records will also contain as addendums the updated versions of the Action Lists with alternate language. The updated relevant Action Lists are attached. The updated Action List for R1ES reflects some corrective action made by the Mechanical Contractor. There are a few items that the contractor noted to be corrected, but the Commissioning Technician will need to confirm these changes at the next site visit. RCM is currently withholding payment for the Mechanical Contractor until all of the applicable items on the list are corrected. The Commissioning Technician again reached out to the product representative from Sass, Moore & Associates, Inc. regarding the ERU issues at the elementary schools, in order to get a status update. The representative has not responded. The Commissioning Technician in this situation does not have authority to enforce corrective action on contractors, but does recommend that pressure is kept on the mechanical contractor/product representative to resolve the questions still lingering from the other similar projects. 353 MARKLE DRIVE, HARRISBURG, PA 17111 PHONE: 717.561.8030 FAX: 717.561.8038 WWW.REYNOLDSCONSULTINGENGINEERS.NET PAGE 1
1 HP-6 D120 HVAC # Unit Location Trade Problem Action Unit tested for cooling mode and compressor was enabled by BAS. Supply air temperature remained at 75 F and LWT did not increase. Additions and Alterations to William Tennent High School Check heat pump operation. 9/7/12 Ongoing 2 HP-4 E123 HVAC/ATC System Enable is Off Investigate the system enable point. 9/7/12 10/25/12 3 HP-1 A200J HVAC/ATC Unit tested for cooling mode: setpoint was adjusted down to 67 F and compressor was energized. Supply air temperature shows - Check temperature sensor. 9/7/12 10/1/12 60.2 F and LWT is also -60.2 F prior to test and no change after setpoint adjustment. 4 HP-15 A203A HVAC SA temp @ 85.2 F. Setpoint lowered to 67 F but no change in SA temp. Check heat pump cooling operation. 9/7/12 10/25/12 5 HP-17 A223 HVAC/ATC LWT sensor displaying 231.4 F. Fix/adjust temperature sensor. 9/7/12 Ongoing 6 HP-1 A200F HVAC Unit tested for cooling mode and compressor was enabled by BAS. Supply air temperature did not drop below 63 F and LWT did not significantly increase. Check heat pump operation. 10/25/12 Ongoing 7 HP-21 D201 Nor HVAC 8 HP-21 D201 Sou HVAC 9 HP-17 C201A HVAC 10 BAS Areas E,F ATC 11 MAU-2G G001 ATC Unit tested for cooling mode and compressor was enabled by BAS. Supply air temperature did not drop below 65 F although LWT did increase. Unit tested for cooling mode and compressor was enabled by BAS. Supply air temperature did not drop below 64 F and LWT did not significantly increase. Unit tested for cooling mode and compressor was enabled by BAS. Supply air temperature remained at 72 F and LWT did not significantly increase. Units in Areas E and F frequently display "Cab Error". Unit interface is disrupted. There is no displayed point for space temperature given in the Graphics. The As-Builts show a Manufacturer-provided space sensor, to be mounted and wired by ATC Contractor. Unit was to be controlled by space temperature (Spec. 230923.4.27.B.3.a.1). Check heat pump operation. The Supply Air temperatures are sufficient in full cooling and heating, but not as low or high (respectively) as they could be in optimum performance. Check heat pump operation. The Supply Air temperatures are sufficient in full cooling and heating, but not as low or high (respectively) as they could be in optimum performance. 10/25/12 Ongoing 10/25/12 Ongoing Check heat pump cooling operation. 10/25/12 2/8/13 Check branch controllers and boards for connections. Provide graphics point for space temperature. Currently, the graphic shows a duplicate point of the Return Air Temperature. 10/25/12 11/29/12 11/29/12 Ongoing Page 1
# Unit Location Trade Problem Action 12 CAU-1G G001 HVAC 13 Dom. HWS G001 ATC BAS Graphics does not include a page listed for the unit itself. The CAU Spec (237339) calls for the DDC controls to be manufacturer-provided and to include a BACNet Communications Panel. Does not appear that DDC interface is provided. The DDC Spec (230923) and ATC Submittal calls for minimum system points to be monitored. BAS Graphics does not include a page for the Domestic Hot Water System, as called for on the ATC As-Builts page 302A Provide DDC interface with monitoring of minimum system points. Additions and Alterations to William Tennent High School 11/29/12 Ongoing Provide monitoring for system. 11/29/12 Ongoing 14 EF-33G G002 ATC 15 EUH-1 G002 ATC/ELEC 16 EF-1G G006 ATC 17 ERU-2C Roof ATC 18 RHP-1D, 2D, 3D Roof (Gym) ENGR 19 MAU-1G Prep G107 ENGR Thermostat is wired backwards. The fan is energized when the setpoint is increased to be above the space temperature, instead of when the space temperature is above the setpoint. Thermostat is not powered. Disconnect is in the "On" position but the display screen is blank and not functioning. Unit runs 24/7. Fan should be interlocked to the light switch. Wheel was not running, the unit VFD was in alarm, but the BAS dis not show an alarm condition. Units are acting independently off of three independent thermostats, sometimes contradicting. One provides heating while one is in 100% economizer mode. Gas heating appears to be short-cycling. The Supply Air temperature setpoint is 71 F, and the Supply Air temperature cycles from 62 F to 84 F over the span of 2 min and then returns to 62 F over another 2 min. Using a direct-fired unit with a temperature rise of 75 F, this short-cycling condition will be a probable effect. Re-wire the thermostat. 1/9/13 Ongoing Power the thermostat. 1/9/13 Ongoing Interlock fan with room light switch. 1/9/13 Ongoing Check control wiring. 1/9/13 Ongoing Have units wired to run in tandem off of one thermostat or coordinate all three thermostats in order to prevent contradiction of space needs. 1/9/13 Ongoing Confirm that this design is appropriate. 1/22/13 Ongoing Page 2
# Unit Location Trade Problem Action 20 MAU-2G Garage G010 ATC 21 CAU-1G Boiler Room G001 ATC Unit should be controlled by room thermostat, but currently under control by Supply Air temperature set point, user-definable. Also, it appears that the Return Air temperature is the same point as the Space Temperature. As-Builts call for space thermostat, but none was installed. Space temperature was measured at 55 F and the Supply Air temperature was measured at 31 F. Control the unit from space temperature directly, or reset the SAT set point based on space temperature. Confirm whether the unit is being controlled via Supply Air temperature. Check operation of gas furnace. Additions and Alterations to William Tennent High School 1/22/13 Ongoing 1/22/13 Ongoing 22 RTU-2F Roof (Auditorium) ATC/HVAC Exhaust Fan is OFF. Check Fan operation or condition. 1/22/13 1/29/13 23 RTU-1F & RTU-2F Roof (Auditorium) ATC What determines the "EffDATempSP"? RTU-1F is calling for 55 F under "UnitState" of MinDAT while RTU-2F is calling for 94 F under "UnitState" of Htg. Coordinate dual-unit operation in single space so that one unit is not in cooling mode while the other is in heating mode. 1/22/13 Ongoing 24 EUH-1 F114 HVAC There is no unit disconnect located on the unit. Install proper disconnect on specified unit location. 1/22/13 Ongoing 25 ERP-3 (x2) C233 ATC/HVAC Upon entering the room, the thermostat was noted to be set to 40 F. Both units were measured with an IR tool to be approximately 125 F. After turning the t-stat up above the room temperature (approx 70 F), the North unit began to cool down (90 F) and the South unit began to heat up (210 F). After turning the t-stat back down below room temperature (to 55 F), the North unit began to increase again (110 F and rising) and the South unit began to decrease (165 F and falling). Correct the control wiring so that both units increase and decrease together. Also, investigate why both units were measuring 125 F at steady state when the thermostat was set well below the room temperature. 1/29/13 Ongoing 26 ERP-5 A224B ATC/HVAC Unit does not energize when thermostat is turned up above the room temperature. Check the unit disconnect, power, or control wiring to confirm proper installation. 1/29/13 Ongoing Page 3
# Unit Location Trade Problem Action Additions and Alterations to William Tennent High School 27 EF-10G G103 ATC EF is running despite the dishwasher being deenergized. Check control wiring. 2/1/13 Ongoing 28 EF-21F, - 22F, -23F Roof/ F101 ATC/HVAC EFs are running constantly. There is no thermostat for EF-23, and there are no switches for EF-21 & -22, as called for in As-Builts. Install thermostat and/or switches as called for in As-Builts. 2/1/13 Ongoing 29 B-1 & B-2 Boiler Room G001 ATC/ENGR ATC As-Builts show the HWS temperature setpoint reset as OA 0-60 F = HWS 160-200 F, but the system has been changed. Temperature setpoints of 152 F corresponding to 49 F OA have been observed. Confirm design intent with design engineer. 2/11/13 Ongoing 30 RHPs (all units) Roof ATC The equipment submittal sequence says that the unit is controlled by a Supply Air Temperature/ Dew Point. It appears on the graphics that the Room Temperature setpoint is controlling the units. Confirm design intent with design engineer. 2/13/13 Ongoing 31 RHP-4G Roof HVAC Heat wheel is not running when commanded "On" 100%. There is no alarm listed active to report this condition. Check control programming and/or wiring. 2/13/13 Ongoing 32 EF-20F Roof (Stage) ATC Unit remains energized when commanded into Night (Unocc) Mode. The sequence calls for Occ./Unocc. operation. Check control programming and/or wiring. 2/13/13 Ongoing 33 RTU-1F & RTU-2F Roof (Auditorium) ATC The units contain a heat wheel, gas furnace, DX coil, and a hot gas reheat system. No information is given regarding the operation of each of these components, except for whether "Cooling", "EconoMode", or "Heating" is enabled. Complete graphics page with all available points from the unit. 2/13/13 Ongoing Page 4
# Unit Location Trade Problem Action 34 HWS Boiler Room G001 ATC/ENGR 35 EC -1 & -2 Outside ENGR/HVAC During the heating season, at the morning startup, the loop temperature drops down into the sub- 60 F range. The Heat Exchanger valve is open 100%. Zones are staged on five minutes apart. Is this acceptable? Submittal review by the professional is noted "Approved as Noted" with instructions to provide equipment with discharge isolation hood, dampers, and insulation. There is no hood installed. Was this accepted by the professional after the submittal review due to other considerations? Confirm with the professional about appropriate CWS loop temperature ranges. Zones should be staged with sufficient time in between in order to prevent such dramatic drops in loop temperature. Confirm with the professional about equipment installation without the discharge hood and insulation/isolation. Additions and Alterations to William Tennent High School 2/13/13 Ongoing 3/1/13 Ongoing Page 5
1 ERU-4 Roof ATC/ENGR # Unit Location Trade Problem Action Unit is not listed on the BAS Graphics page. 11/12/12 - Unit does not contain BAS interface capabilities. Owner staff currently switches on the unit at breaker every day. How was this unit intended to operate? Add unit to graphics. Determine unit's design intent. Alterations to Willow Dale Region 3 Elementary School 10/24/12 Ongoing 2 MAU-1 Roof ATC Unit is not listed on the BAS Graphics page. Add unit to graphics. 10/24/12 Ongoing 3 HP-1 B014 ATC/HVAC BAS displays LWT= -60.2 F Fix/adjust sensor. 10/24/12 Ongoing 4 HP-7 A125 HVAC BAS displays both compressors commanded 'ON', but LWT did not increase and SAT did not decrease when the setpoint was below space temperature. Check heat pump operation. FIXED. 10/24/12 12/21/12 5 HP-7 A126 HVAC 6 HP-7 B114 HVAC 7 HP-20 C111/112 HVAC 8 EF-4 & -5 Roof ATC 9 EF-6 D111 ATC/HVAC BAS displays both compressors commanded 'ON', but LWT did not increase and SAT did not decrease when the setpoint was below space temperature. BAS displays both compressors commanded 'ON', but LWT did not increase and SAT did not decrease when the setpoint was below space temperature. BAS displays both compressors commanded 'ON', but LWT did not increase and SAT did not decrease when the setpoint was below space temperature. Unit is not listed on the BAS Graphics page. No sequence is listed in ATC shop drawings for these specific units. UPDATE 2/12/13- Units were part of phasing of the project construction, but the ATC submittal still calls for Occupied/Unoccupied control. Currently, the maintenance staff manually controls the fans via the disconnect. Unit is not listed on the BAS Graphics page. UPDATE 12/21/12 - Encountered unit running in space. Setpoint was listed at 74 F, but the room was at 70.5 F. The unit should have been deenergized. Check heat pump operation. FIXED. 10/24/12 12/21/12 Check heat pump operation. FIXED. 10/24/12 12/21/12 Check heat pump operation. FIXED. 10/24/12 12/21/12 Add unit to graphics. Provide Occupied/ Unoccupied control. 10/24/12 Ongoing Add unit to graphics. Check unit operation. 10/24/12 2/12/13 Page 1 Updated 4/3/13
# Unit Location Trade Problem Action 10 ERU-1 Roof ATC/HVAC Enthalpy wheel is commanded "OFF" (in Priority BN10). OA temp is 45.8 F, SA temp is 46.6 F while the setpoint is 70 F. UPDATE 12/21/12: Unit enthalpy wheel is currently overridden at the unit controller to continue to operate in Occupied mode. Controller is displaying alarm condition "ALM 61: EHRD - ENTHWHEEL FLT". Check enthalpy wheel programming and wheel fault condition. Alterations to Willow Dale Region 3 Elementary School 11/12/12 Ongoing 11 CAU-1 C104 ATC/ENGR 12 MAU-1/EF-2 C109/Roof ATC 13 EF-3 Roof ATC 14 EF-1 C102 ATC There is no Supply Air probe in the duct. The SA probe is supposed to be controlling the gas valve operation to maintain a supply temperature set point. The heating is short-cycling on the unit, with staging coming on, off, and on again within the span of several minutes. UPDATE 2/12/13 - The space temperature is consistently above 80 F and the unit consistently produces 90+ F supply air during the Occupied mode. The design intent should be confirmed with the Engineer for whether the supply air temperature should be reset based on the space temperature. Units are to be interlocked and energized by a wall switch. Currently, the occupant must turn on the breaker and then the units start to run, regardless of the wall switch. UPDATE 2/20/13 - The EF is functioning as intended. The MAU heats the air properly (35 F OA to 75 F SA), but is not properly interlocked to engergize with the fan turning on and off. Fan energizes in the morning automatically. The unit should be interlocked with the dishwasher operation so that it only runs when the dishwasher is operating, plus 15 minutes after the dishwasher is de-energized. No thermostat located in room. Sequence calls for unit to be energized when space temperature exceeds thermostat set point. Also, the unit is listed as "OFF" on the BAS, but the unit was constantly running. Install supply air probe and investigate shortcycling operation. Confirm the design intent of the supply air temperature control versus space temperature control reset. 12/21/12 Ongoing Check programming and/or control wiring. 12/21/12 Ongoing Check programming and/or control wiring. 12/21/12 Ongoing Install thermostat. Check programming and/or control wiring. 12/21/12 Ongoing Page 2 Updated 4/3/13
# Unit Location Trade Problem Action 15 ERP-1 A017 ATC/HVAC Unit does not energize when the thermostat setpoint is increased above the space temperature. Alterations to Willow Dale Region 3 Elementary School Check power and/or control wiring. 2/12/13 Ongoing 16 General General ATC/ HVAC/ Elec The approved As-Builts and O&Ms have not been received on-site by the maintenance staff. Send the appropriate documentation to the Owner. 2/20/13 Ongoing 17 HWS C104 ATC/ENGR During the heating season, at the morning startup, the loop temperature drops down into the sub- 60 F range. The Heat Exchanger valve is open 100%. Zones are staged on less than five minutes apart. Is this acceptable? Confirm with the professional about appropriate CWS loop temperature ranges. Zones should be staged with sufficient time in between in order to prevent such dramatic drops in loop temperature. 2/25/13 Ongoing Page 3 Updated 4/3/13
# Unit Location Trade Problem Action New Construction Davis Region 1 Elementary School Added Fixed/ Status 1 EC-1, -2 Outside Elec./ATC Float switches and basin thermostats not wired. Complete wiring. 10/18/12 1/9/13 2 CAU-1 D106 HVAC/ATC 3 CAU-1 D106 HVAC There is no ATC interface with unit operation. The approved sequence calls for 11 different minimum system points. Unit is supplying 33 F air into the space (measured by IR tool). Provide unit interface on BAS front-end. UPDATE 4/10/13 - The approved unit does not provide BACNet monitoring points. ATC interface is unavailable. Confirm that the gas valve is properly connected. Confirm that valve controls are complete. 1/22/13 4/10/13 1/22/13 Ongoing 4 EF-7D D102 Elec/ATC The fan is hanging in place and connected to the ductwork, but is not wired. UPDATE 2/20/13 - The unit is now powered, but is energized 24/7. The unit should be wired to a pressure switch that only energizes the fan when the dryer turns on. The drawings also indicate a disconnect switch for the fan, but none is currently installed. Make the proper power and control wiring connections. 1/22/13 Ongoing 5 OAT Sensor Exterior HVAC/ATC Sensor is located on east-facing, not north-facing, wall. It is also located in close proximity to evaporative coolers. Confirm with professional that this location is acceptable. UPDATE 4/10/13 - Siemens reports to have relocated the sensor. 1/22/13 4/10/13 6 Boilers, HWS Pumps, CWS Pumps D106 ATC The sequence calls for lead/lag of the units to be automatically evaluated on a weekly (boilers) or a monthly (pumps) basis. Thus far after construction completion, the boilers and pumps have remained on their start-up lead/lag positions. Check control programming to ensure proper lead/lag. UPDATE 4/10/13 - Siemens reports to have fixed the programming, however the graphics still display Boiler 1 as the lead boiler. The CS&E panels should be checked for proper boiler control selection. 2/20/13 Ongoing 7 B-1, B-2 D106 ATC/ Elec/ HVAC There are multiple obstructions to removing the service access panels. Electrical and control wiring, conduit, and a gas line elbow interfere with proper opening of the doors. UPDATE 3/27/13 - Electrical conduit has been relocated. ATC conduit still obstructing access. Gas line piping is not an issue; District personnel operated doors to check for clearance and confirmed that the pipe is not an obstruction. Re-route wiring, conduit, and piping. UPDATE 4/10/13 - Siemens reports to have fixed the conduit obstruction 2/20/13 4/10/13 Page 1
# Unit Location Trade Problem Action 8 ERU-1A Roof HVAC 9 ERUs Roof HVAC/ ATC 10 HWS D106 ATC/ENGR 11 ERUs Roof ATC 12 Lighting E104 ELEC 13 EF-1 D107 HVAC/ELEC The supply fan compartment door is severely obstructed. The access door opens only a few inches due to the roof eaves located directly next to the unit. It appears the unit was installed at the approximate location shown on the drawings, but the compartment/ductwork configuration is different. This caused the supply fan compartment door to be located on a different side. All of the ERUs are running the enthalpy wheel VFDs at 100% during Occupied mode. Typical operation should not require 100% operation. Does the ATC programming include the supply air temperature as an input for how fast the VFD is set? During the heating season, at the morning startup, the loop temperature drops down into the sub- 60 F range. The Heat Exchanger valve is open 100%. Zones are staged on 15 minutes apart. Is this acceptable? ERUs are being energized with the Occupied start of the zone. Should there be a "Morning Warmup/Cool-down" period, with the heat pumps in recirculation and the ERUs de-energized, in order to place a light load on the system at morning start-up? Introducing outside air may increase the load on the system. Light switch timer is frozen and emitting an audible notification. Unit fan is not operating when the switch is enabled. UPDATE 3/27/13: TAB contractor informed that fan is operating backwards. Change the ductwork configuration to allow proper clearance for maintenance tasks, or provide alternate access to the supply fan. Check control parameters within the internal controls. Check the control programming for proper operation. Confirm with the professional about appropriate CWS loop temperature ranges. Zones should be staged with sufficient time in between in order to prevent such dramatic drops in loop temperature. Confirm with the professional about Occupied mode sequencing and schedule the appropriate ERU/ HP operation and staging. Investigate cause of lighting malfunction. District personnel resolved the issue. Check power/ control wiring or disconnect position. New Construction Davis Region 1 Elementary School Fixed/ Added Status 2/20/13 Ongoing 2/20/13 Ongoing 2/25/13 Ongoing 2/27/13 Ongoing 2/27/13 3/27/13 2/27/13 Ongoing Page 2
# Unit Location Trade Problem Action New Construction Davis Region 1 Elementary School Fixed/ Added Status 14 MAU-1 Roof HVAC Unit not operating when switch is enabled. Is the unit wired to run on current sensor from fan or from the wall switch? The internal controller screen is blank but the unit disconnect is "On." Check controller for errors. Confirm operation interlocked with fan operation. 2/27/13 Ongoing 15 EC-1, -2 Outside ATC/ENGR The control dampening on the Fan VFDs is not accurate. The system was observed to have a CWS loop temperature of nearly 88 F and the fans were ramping up (at 11% when first observed). Five minutes later, the CWS loop temperature had dropped to 72 F and the fans had still be ramping up (at 66% when observed). This caused an overshoot of the loop to go below 70 F at which point the heat exchanger/boiler loop activated to bring the CWS loop back above 70 F. The two systems fought each other until the loop temperature settled out within the deadband. The fans should be staged on a delay so that the spray pumps operate for a specified period of time before the fans stage on. The fans should then stage on to a low-level VFD setting, such as 20%, and the system should evaluate the loop temperature after another specified period of time and increase as necessary. The control dampening needs to be tuned to the proper response time. UPDATE 4/10/13 - Siemens reports that all control settings are based on the Engineer's specifications. Confirm with the professional that the design is implemented properly. 2/27/13 Ongoing 16 CWS Bldg ATC/ENGR The heat pumps are designed to receive 70 F EWT in heating season and 85 F EWT in cooling season. The sequence calls for the heat exchanger valve to open when the loop is below 60 F and the evaporative coolers to energize when the loop is above 90 F. The current BAS programming calls for a 70 F to 80 F deadband. What is the "correct" deadband supposed to be? Confirm with the professional what the acceptable deadband is supposed to be. Program accordingly. UPDATE 4/10/13 - Siemens reports that all control settings are based on the Engineer's specifications. Confirm with the professional that the design is implemented properly. 2/27/13 Ongoing Page 3