Data Aire LCS Installation, Operation And Maintenance Manual page 4

Large ceiling system (lcs) 6, 8, 10 and 13 ton air, water and glycol cooled dx and chilled water
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4.0 INSTALLATION OF REMOTE OUTDOOR HEAT EXCHANGER
4.5 Air Cooled Condensers - Model DARC ............................................................................. 18
4.5.1 Fan Speed Control ....................................................................................................... 18
4.5.2 Ambient Thermostats ................................................................................................... 18
4.6 Fluid Coolers - Model DAFC .............................................................................................. 19
4.6.1 Fluid-Sensing Thermostats .......................................................................................... 19
4.6.2 Energy Saver Cooling .................................................................................................. 19
5.1 Voltage Phase Check .......................................................................................................... 20
5.1.1 Evaporator .................................................................................................................... 20
5.1.2 Secondary Heat Exchanger ......................................................................................... 20
5.2
Air Cooled Systems ...................................................................................................... 20
5.2.1 Split Indoor Air Cooled Systems Charging ................................................................... 20
5.2.2 Fan Speed Control System Charging........................................................................... 21
5.2.3 Flooded System Charging ............................................................................................ 21
5.3
Water/Glycol Cooled Systems ...................................................................................... 22
5.3.1 Water/Glycol Cooled Systems Charging ...................................................................... 22
5.4
Refrigerant Handling .................................................................................................... 23
5.5
Important Refrigeration Components ........................................................................... 23
5.5.1 Expansion Valve ........................................................................................................... 23
5.5.2 High Pressure Cutout Switch ...................................................................................... 24
5.5.3 Low Pressure Cutout Switch ........................................................................................ 24
6.1 Glycol Concentration ......................................................................................................... 24
6.2 Internal (Fluid) Volume....................................................................................................... 24
6.3 Fluid Cooler Internal Volume ............................................................................................. 24
6.4 Copper Piping Internal Volume .......................................................................................... 25
6.5 Freezing Point of Aqueous Solutions ................................................................................. 25
7.1 Mini dap4 Controller........................................................................................................... 25
7.2 Optional Expanded dap4 Controller................................................................................... 25
7.3 Secondary Heat Exchangers ............................................................................................. 25
7.4 Wiring Diagrams ................................................................................................................ 26
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- (continued)

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Gerald Swenson
March 10, 2025

I **** looking for the user manual for a Data Aire CRAC unit, model DGTU-0534 serial 2011-3545-B I **** with the Mpls V.A. Medical Center.

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