PDF - Centralia College

W O O D H A R B I N G E R , I N C . | M e c h a n i c a l / E l e c t r i c a l E n g i n e e r sMemoTo:David LeavengoodCompany:Leavengood ArchitectsFrom:Bob AxleySubject:Existing Mechanical and ElectricalSystems Conditions ReportProject No:Date:0709711/1/07Project:Centralia CollegeKemp Hall and Student Union BuildingDiscussion:Per your request, I visited the College yesterday, walked through Kemp Hall and the Student Union Building andmet with Gil Elder to assess the condition of the existing mechanical electrical systems in these buildings.Following is a description of my findings and observations.KEMP HALL:A. HVAC Systems1. Existing Conditions:The building was originally built in the 1950’s. The building originally had no air conditioning and washeated with radiant floor heating using a gas fired hydronic system. Over time, leaks in the buried heatingpiping required abandoning of this system. In 1988, new HVAC systems were added to condition theentire building. This HVAC system, which consists of twelve rooftop air cooled heat pumps, still existstoday. Currently, Siemens DDC controls are installed throughout the building.2. Observations/Recommendations:The heat pump equipment is near or at the end of their expected useful life. Due to their age, compressorreplacement is routine and the heat pumps are quite inefficient compared to current technology and Coderequirements. Packaged outside air economizer controls, requiring building pressurization to maintainminimum outside air quantities, are outdated and ineffective resulting in poor ventilation control in thebuilding.Due to their age, condition and inefficient operation, these HVAC systems need to be replaced in theirentirety.B. Plumbing Systems1. Existing Conditions:Plumbing systems in the building consist primarily of the central toilet rooms with a few sinks dispersed inclassrooms throughout the building and in the greenhouse. Most of the domestic hot and cold waterpiping is the original galvanized steel. Some of the original plumbing piping that was buried in the slabhas been replaced due to pipe failure. Plumbing fixtures do not appear to be original equipment and arein fair condition. Domestic hot water is generated with an electric water heater.2. Observations/Recommendations:The existing galvanized water piping poses a potential health hazard. Therefore, all existing galvanizedsteel potable water piping should be replaced.Due to its age and condition, the domestic water heater should be replaced. Consideration should begiven to installing a gas water heater to reduce energy cost.All plumbing fixtures should be replaced with new, water conserving type fixtures.Backflow prevention should be installed in the domestic cold water piping serving the greenhouse.Kemp Hall & Student Services Building ReplacementAppendix DPage 13009 112th Avenue NE, Ste. 100 Bellevue, WA 98004 T (425) 822-9499 F (425) 822-4338 woodharbinger.com