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Northeast Ohio Valley
Directions to 4350
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About the Center
Structural Information Building Gross Area
Column Lines 30 feet x 30 feet Floor Loading 70 pounds per square foot Power Utility Source Duquesne Light Company (DLCO) supplies electric service to the site. DLCO has two 23,000 volt underground lines serving an underground automatic substation. The utility lines originate from different bus sections of the DLCO 138 kV to 23 kV Universal Substation. The substation on site has 4-23 kV oil circuit breakers and 2-7500 kVA 23,000-4160 volt transformers. The substation will automatically isolate an incoming line or transformer as necessary to isolate a problem. Building Substations Service voltage into the building is 4,160 volts. There are two 4,160 volt substations, one serves the East Tower and the other serves the West Tower. There are two DLCO feeders to each substation. The Substations each have two bus sections to provide flexibility for maintenance and isolation of an electric problem. There is an onsite standby generator system that also feeds each bus section. 4160 Volt Distribution The 4160 volt power is distributed to 7 double ended power centers. Each power center has two 1000/1333 kVA 4160-480/277 volt transformers. Each power center is served from both bus sections for flexibility in operation and maintenance of the electric system. 480 Volt Distribution Power is distributed to electric rooms on each floor and to two large UPS Systems serving the computer rooms. Motor control centers for HVAC equipment are served by feeders from both bus sections. Telecom/Fiber Floor System Both the East and West towers have a cellular floor system to distribute power and communications through out the office floor area. Communication There are three duct routes that provide communication service to the site. The main site duct bank is owned by Verizon and enters near McGinley road and crosses the site entering the East tower near the circle. Verizon provides fiber service from the Monroeville and Turtle Creek central offices. There is a fiber route with the main power duct bank that runs along the entrance drive from Northern Pike, goes around the east end on the building and enters in the back of the east tower. This route includes a fiber cable for ATT via First Communications and a fiber cable from Duquesne Light Communications. The third route enters the West Tower through the lower parking lot and completes the Duquesne Light Communications Pittsburgh loop. HVAC West Tower The HVAC system for the west tower is all electric. The West Tower chiller office and computer room loads are served by a common chiller plant. The chillers operating are selected to match the heat recovery requirements for the best coefficient of performance for the chiller plant. Chill Water System Total chiller plant capacity is 1600 tons.
Each chiller is supplied by its own chill water and condenser water pump. The chill water pumps for each chiller are 40 HP. The heating hot water system has two 25 HP pumps to circulate the hot water heat recovery system. The computer room chill water supply consists of 2 loops to supply computer room air conditioning units. The 6 inch floor loop is supplied by two 10 horsepower, 400 GPM pumps, typically only one pump is required for the cooling load. The 8 inch ceiling loop is supplied by two 20 horsepower, 750 GPM pumps connected to variable frequency drives, one pump is normally standby. The condenser water is pumped by the individual chiller 40 HP condenser water pump to a roof top 3 cell Marley cooling tower. The cooling tower is rated 1500 tons. Each cell on the tower is rated at 500 tons, 1500 GPM and has a 2 speed 25 horsepower fan. Back Up Electric Heating Boilers The building has two electric boilers, rated 1700mBH to backup the hot water heating system if there is insufficient heat recovered from the building core and computer room. Air Distribution The office area HVAC is supplied by a variable air volume system (VAV) split into north side and a south side fan systems with dual 100 Horsepower variable speed fans. The computer room uses a 22,000 CFM, dual fan system, to provide basic cooling and humidity control. The fans are 30 horsepower and one fan is operated as standby. The core area that includes the lobby, cafeteria, fitness center and loading dock are supplied by an independent fan system. Controls The HVAC is controlled by a Siemens Direct Digital Control system. The system is an Apogee system with distributed field panels. The control actuators are pneumatic and supplied by a dual air compressor system. The control system had a graphic user interface for the operator to monitor and operate the HVAC system. East Tower The HVAC system for the East Tower is all electric. The East Tower chiller office and computer room loads are served by a common chiller plant. The chillers operating are selected to match the heat recovery requirements for the best coefficient of performance for the chiller plant. Chill Water System Total chiller plant capacity is 1000 tons.
There is a common header for the chill water and condenser systems. There are two 40 HP chill water pumps to circulate the chill water through the chillers to the building. There is a plate and frame exchanger to take advantage of free cooling in winter weather with a capacity of 225 tons. The condenser water is pumped by one of two 60 HP, 2400 GPM pumps from the chillers to the two roof top Marley NC9021BS cooling towers. The cooling towers are rated 800 tons each. Each tower is rated 2400 GPM and have a 40 horsepower variable speed fan drive. The hot water heating system has two 15 HP pumps that circulate the hot water from the heat recovery chillers to supply the hot water heating system. Back Up Electric Heating Boilers The building has two electric boilers, rated 1260mBH to backup the hot water heating system if there is insufficient heat recovered from the building core and computer room. Air Distribution The office area HVAC is supplied by a constant volume air system. Floors 2-5 each have two fan systems split for the north and south side offices. There is a perimeter air system that provides heating or cooling make up for the window heat gain or loss. The computer room uses a 20,000 CFM fan system, to provide basic cooling and humidity control. The fan is rated 15 horsepower and 20,000 CFM. The computer room has three independent Liebert DX computer room cooling units with 22 ton cooling capacity each. Controls The HVAC is controlled by a Siemens Direct Digital Control system. The system is an Apogee system with distributed field panels. The control actuators are pneumatic and supplied by a dual air compressor system. The control system had a graphic user interface for the operator to monitor and operate the HVAC system. This system is common with the West Tower HVAC. E mergency PowerUPS Systems Both the East and West Tower Computer rooms are served by UPS systems. The East Tower has a 1500 kVA UPS system consisting of 3 - 500 kVA modules and a 15 minute battery power reserve. The West Tower has a 500 kVA UPS with a 15 minute battery power reserve. The UPS systems have static and maintenance bypass’s to permit maintenance of the systems without interruption to the computer load. The UPS systems are supplied from the double ended switchgear with two 4,160 – 480 volt, 1000 kVA transformers. A 5000 kW standby generator building is adjacent to the DLCO substation. Five 1000 kW diesel generators, two 10,000 gallon underground fuel oil tanks, paralleling switchgear and PLC control make up the standby generator system. The standby generators will automatically start after interruption of utility power and sequence to connect to the building electric system. The system will automatically shed building load, if necessary, to maintain power to the computer systems and cooling equipment. On return of utility power the generator system will parallel to the utility and transfer the load from generator to utility without interruption. Emergency Power The site has a 400 kW Emergency diesel generator that provides power to emergency lights and critical circuits within 10 seconds of a power interruption. The system has a 1,000 gallon underground fuel tank. The emergency power system powers PC/PLC UPS’s that control the logic to operate standby generator system. Water/Sewage Water Supply Water to the site is provided by the Monroeville Municipal Authority. The metering is in the meter pit at the McGinley road entrance to the site. From the meter pit the service is a 12 inch line that crosses the site running along the drive between the main parking lot and the extended parking lot toward the upper parking lot. The water line turns and runs along the upper lot toward the main entrance circle. At the circle the line “T’s “ entering the east tower and a 10 inch line runs along the front of the West tower, turns back the service road to the back of the West tower where it “T’s” to the water service entrance in the West Tower fire pump room and also extends to the generator building. There are six fire hydrants connect to the water service line. There is a connection in the circle that supplies the circle lawn sprinkler system. Sewage The sanitary sewer service is by Monroeville Municipal Authority. The site is responsible for the sewer line exiting the back of the towers and generator building. From the east end of the generator building area the line extends down toward the turnpike running through 5 manholes until intercepting the Authority manhole where the Authority line crosses under the turnpike, this manhole is below the main entrance guard station. Note: Certain building features currently exist at the building, and are subject to change or discontinuance. |
Contact Information
Executive Vice President 412.261.0200 ext. 480
Vice President 412.261.0200 ext. 493 |
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© 2010 Oxford Realty Services • One Oxford Centre • Suite 400 • Pittsburgh, Pennsylvania 15219 |
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