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 sMemo (cont.)Project No: 07097Project: Centralia CollegeKemp Hall and Student Union BuildingSubject: Existing Mechanical and Electrical Systems Conditions ReportSTUDENT UNION BUILDING:A. HVAC Systems1. Existing Conditions:The building was originally built in the 1960’s. The building originally had no air conditioning and washeated with electric unit ventilators. In 1986, new HVAC systems were added to condition the entirebuilding. This HVAC system, which consists of ten air cooled heat pumps, still exists today. Currently,Siemens DDC controls are installed throughout the building.The six heat pumps serving the single story cafeteria end of the building are packaged rooftop units. Theheat pump serving the second floor office area consists of a fan coil unit in a rooftop penthouse with theair cooled heat pump on the adjacent roof. Three heat pumps serving the lower floor Book Store andCounseling area consist of fan coil units located in a small mechanical room on grade with associatedheat pumps on the roof.The heat pump system serving the second floor offices has no supplemental heat. Therefore, two unitventilators with electric heat are staged on during cold weather to keep the floor warm.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outside air economizer controls, requiring building pressurization to maintainminimum outside air quantities, are outdated and ineffective resulting in poor ventilation control in thebuilding.Zoning of the heat pumps is poor, providing inadequate temperature control. This is particularly true onthe second floor which consists of only one zone.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 of the central toilet rooms with a few sinks dispersed inclassrooms throughout the building and in the kitchen. The domestic hot and cold water piping isreported to be copper. Plumbing fixtures do not appear to be original equipment and are in fair condition.Domestic hot water is generated with a gas fired water heater for the kitchen and an electric water heaterfor all other domestic hot water usage.2. Observations/Recommendations:Due to its age and condition, the domestic water heaters should be replaced. Consideration should begiven to installing a gas water heater for general domestic use to reduce energy cost.All plumbing fixtures should be replaced with new, water conserving type fixtures.C. Fire Protection Systems1. Existing Conditions:There currently is no fire sprinkler system in this building.2. Observations/Recommendations:Consideration should be given to installing wet pipe fire sprinklers in this building to enhance life safety.Page 33009 112th Avenue NE, Ste. 100 Bellevue, WA 98004 T (425) 822-9499 F (425) 822-4338 woodharbinger.com