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I F�ne 'gy, Building 3000 has a complete DDC control system including extensive use of CO2 sensing. Observation of the system did not show any values from the CO2 sensors and it is not clear how these are intended to be utilized. 4.3 Chiller Plant 4.3.1 Chillers The chiller plant is located in Building 1000 and is comprised of two chillers as follows: • CH1: Carrier, 150 Ton Capacity (original to building 1000) • CH2: York, 250 Ton Capacity (added when building 2000 was constructed) The building operators indicated that CH1 has a maximum amperage rating of 150 amps and in the summer this unit will approach 145 amps. The operators have had problems with the new chiller especially at start -up and shut -down of its operations. Unfortunately the York Chiller is likely the most efficient machine in the plant and should be used for base loading whenever possible. 4.3.2 Chilled Water and Condenser Water Pumps Each chiller has a primary chilled water anc condenser water pump. In addition there a constant volume secondary chilled water pt circulate water to the three buildings. Whei observed the building both of these pumps running. Generally the secondary pumps at designed to be redundant and we advised t the second pump and seeing if the building enough capacity with just one pump runnir 4.3.3 Coo ling Tower Two Evapco single -cell cooling towers serve the chiller plant. The cooling tower fan motors are constant speed. The condenser water pumps are also constant flow 4.4 Controls 4.4.1 HVAC Controls RCCC South Campus has a Johnson Controls Metasys system, which does not appear to be operating in an optimal fashion. Campus staff indicated they need training on this system to more effectively implement and sustain energy saving strategies. The campus systems run 24x7 except for holidays. Several of the HVAC set points had been zeroed out on the BAS. Rev A 2012 -05 -15 Page 20 Final Draft G -2 Page 344 Figure 16: Building 1000 CHW pumps