Announcement

Tucson Unified HVAC Summer Projects in Preparation for the 2018-2019 School Year

Date issued: July 25, 2018

With the 2018-2019 Tucson Unified School District (TUSD) school year starting next week, 8/2, TUSD has been hard at work to replace, upgrade, and repair the HVAC systems in a number of schools across the district.  The District has put these processes in place to ensure our systems are functioning effectively.

  • Key staff members hold weekly meetings to discuss, prevent, and prepare for HVAC related issues.
  • Staff performed HVAC preventive maintenance on equipment at all of our schools, replacing all filters and belts.
  • Custodians working over the summer were instructed to report any issues with cooling.
  • Facilities Customer Service Specialists communicate with staff at the schools for faster response time.
  • Additional portable cooling units were purchased to be used as needed.

Below is a list of the HVAC projects completed and in process.

Cholla High School

  • Cooling tower is being replaced and will be complete by August 14.  Temporary towers were installed for the changeover, and will remain in place to keep the classrooms cool until the project is complete.
  • K-Pod Air Handler Replacement – when the school was built, this space was an open format.  However the space was changed to classrooms, and the existing equipment wasn’t designed for that use and attempts to make the equipment work in the space have not been successful.  An engineer has been engaged to design and install the proper equipment.  The district expects this to be complete by start of school.

Roskruge Bilingual K-8 Magnet School

  • Two air cooled chillers failed last year and have been replaced.  The new units are quieter than the older units.
  • Plant controls failed and were replaced with controls that are compatible with our central system.

Oyama Elementary School

  • Replaced one air cooled chiller that had continuing breakdowns.  The new unit should be installed by 8/30.

Pistor Middle School

  • The tower was filled with silt, making it inefficient.  The tower is working but the tower fill will be replaced over fall break.  Students will not experience a difference, but the replacement is necessary to extend the life of the tower.

Mansfeld Middle School

  • This kitchen was cooled with an evaporative cooler that was at the end of its life and was no longer keeping the kitchen at required temperatures.  This unit is being replaced with A/C however the building had to be structurally reinforced to hold the added weight of the new unit.  This work started as soon as school was out and will be completed by the start of school.

Cragin Elementary School

  • This kitchen was cooled with an evaporative cooler that was at the end of its life and was no longer keeping the kitchen at required temperatures.  This unit is being replaced with an A/C unit however the building had to be structurally reinforced to hold the added weight of the new unit.

Cooper Center for Environmental Learning (Camp Cooper)

  • >Replaced 2 failed HVAC units.  The existing units were not sufficient to cool the rooms to a comfortable temperature level.  Eight additional units for the bungalows are planned to be installed.

Santa Rita High School

  • Chiller repairs – The Chillers at this site have been repaired and are operating but the units are in need of replacement. A request to the School Facilities Board is being submitted for the replacement.

Morgan Maxwell K-8 School

  • Replaced failed hot and cold loops used to circulate hot and cold water throughout the building.  The old pipes had eroded and were repaired multiple times, but there were continuing challenges.  The pipes are in the process of being replaced.

Magee Middle School

  • Failing cooling tower.  Repairs have been made to keep the tower functioning for the start of school.  The cooling tower will be replaced over fall break.

Catalina High, Morgan Maxwell K-8, Sahuaro High, Dietz K-8 Schools

  • Repaired failed plate and frames for energy efficiency.  As long as temperatures are moderate, this more cost efficient unit will run in place of the chiller.  The chiller only engages in high temperatures.

Rincon High School

  • Rebuilt the cooling tower.  Also changed the sprinkler system and did a thorough cleaning of the system.  The TUSD schools use several types of cooling systems and some of our schools use “chillers” which help to make the system more efficient.  A chiller sends hot water to the cooling towers, where heat is removed.  Cooling towers operate through a heat transfer process that efficiently cool the already cycled water to be reused. The hot water from the chiller enters near the top of the cooling tower and is sprayed across the wide surface area of the heat transfer surface creating cool air which is promptly suctioned towards the top of the tower via a fan.
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