Agenda Packets - 2010/10/25 - Laserfiche WebLink

Home Browse Search

Item No: 8H Meeting Date: October 25, 2010 Type of Business: Consent Agenda Administrator Review: ____ City of Mounds View Staff Report To: Honorable Mayor and City Council From: Nick DeBar, Public Works Director Item Title/Subject: Resolution 7695, Authorizing Architect Mechanical, Inc. to Replace an 8-1/2 Ton Roof Top Unit at the Mounds View Community Center Background/Discussion: The MVCC was built in 1998 and has nine individual air-handling units that are used to heat and cool the building. These roof top units (RTUs) are installed in various locations on the roof and each are responsible for heating and cooling a certain part of the building. The unit size (measured in tons) is proportionate to the size of area that is being conditioned. An industry standard of 15 years is used for the life cycle of RTU’s in our region. All RTU’s on the MVCC are original. RTU-3 is an 8-1/2 ton, dual compressor unit that is responsible for conditioning the air in Multi- purpose Room C. Late this past summer, one of the compressors went bad but the unit was still functional. However, now the heat exchanger has also went bad last week and the unit has been “red-tagged” by the HVAC contractor, meaning it cannot be used until properly fixed (i.e., no heat or cooling in Room C). City staff contacted several qualified HVAC contractors to get quotes to repair and replace the unit. Repairing the unit will require replacing the compressor and heat exchanger – two major components on the unit. Replacing the unit requires a crane to remove the old unit and place a new unit in the same footprint, then reconnecting the gas line, electrical, etc. (“plug and play”). Two contractors provided quotes for the work. Quotes to repair the unit were $3,500 and $6,500, and quotes to replace the unit were $7,350 and $11,900, respectively submitted. The low quotes were submitted by Architect Mechanical, Inc. of St. Anthony, Minnesota. Although it would cost less now to repair the units (about half of replacement), it is likely that other components of the unit (panels, circuit boards, etc.) will also begin to fail in the next few years. A new unit should be trouble free for the near future and will be more energy efficient. In addition, the $7,350 replacement cost already includes a $1,500 supplier deduct (if purchased by the end of October, 2010) and there is a $720 rebate that the City will get back, putting the net replacement cost closer to $6,630. Recommendation: Staff recommends that the City Council consider adopting Resolution 7695 authorizing Architect Mechanical, Inc. to replace the 8-1/2 ton RTU at the MVCC. If approved, work should be complete within a week or so. Respectfully submitted, Nick DeBar - Public Works Director Attachments: Architect Mechanical Quote Proposal Resolution 7695