Energy Tech Laboratories EDP70 manual Ventilation, = 2770 - - - ∙ e 0.125 h Tk / T0 Tr Tk

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4.4Ventilation

UPS can work in a continuous environment within 18°F[-10°C] to 104°F [+40°C ] temperature range, although, ideally the ambient temperature should be below 78°F [25°C].

The heat, dissipated by the UPS (indicated on figure 7), is extracted by internal fans and then dissipated into the air.

The heat can be removed from the UPS room by a forced cooling ventilation system or, alternatively, an air conditioning system.

The required air changes per hour will depend on the UPS rating and this heat loss and on the cooling air temperature.

To calculate the required air flow for the dissipated power, the altitude and the cooling air temperature, the following equation can be used:

∙Pd

V= 2770 - - - - - - ∙ e (0.125 h Tk / T0 )

		Tr - Tk
with:	V =	air flow [mc/h]
	Pd	= total dissipated power [kW]
	Tr	= max. temperature allowed into the room [104°F = 40°C = 313°K]
	Tk	= Temperature of input cooling air
	T0	= 273 °K
	h	= altitude above the sea level [km]

page 24 --MI00/10056 rev.1--05/2001

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Contents EDP70 Plus Important Safety Instructions Read Before Installing ALL CASES, Seek Medical Attention Immediately Contents Figures Block diagram IntroductionSummary of the manual Summary of the equipment24kVA Standard Configuration Functions 480VOperational modes 24/36kVA Ratings10 --MI00/10056 rev.1--05/2001 Safety General safetySymbols Electrical precautions Battery precautionsBattery safety equipment Installation Mechanical characteristicsStorage ALL Measurements are Millimeters and Inches NR4 16 --MI00/10056 rev.1--05/2001 Battery Cabinet Drawing for 24/36kVA Ratings 18 --MI00/10056 rev.1--05/2001 Battery Cabinet Drawing for 50/80kVA Ratings 20 --MI00/10056 rev.1--05/2001 Installation Recommended wire sizes Supply Output Reserve Supply UPS Type Ventilation = 2770 - - - ∙ e 0.125 h Tk / T0 Tr TkConnection OutputUninterruptible Power System No Unauthorized Operation MI00/10056 rev.1--05/2001-- Table of T& B’s cat.no.s for terminals and crimp tools Electrical connectionsBattery Compartment 24 12/18/24kVAOutput, Reserve, Input Reserve Ground Primary Input Output External Batteries 36 24/30/36kVA Observe Polarities and Orientations RS232 Female EDP70 Plus 50/80kVA 36 --MI00/10056 rev.1--05/2001 QS1 QS2 QS3 QS4 QS5 Signal connections Emergency Power OffBattery charge inhibited Thermostick connector 50/80kVA onlyDisplay indicators ControlsUser Controls Control Panel LCDStart UP Maintenance Bypass Installing the EPOSHUT-DOWN MI00/10056 rev.1--05/2001-- Visual and Audible Alarms Silencing Audible AlarmMimic Liquid Crystal DisplayDisplay Page Headings System NormalBattery Test Weekly Power History Down to Access Load Time on Reserve xxg xxh xxm xxs Inverter Load Abnormal operating mode messages System AlarmStop DUE to Overload RECTIFIER/BATTERY Alarms Message Condition Inverter Alarms Message Condition LOAD/RESERVE Alarms Message Condition Power History Power History MatrixBattery Test Battery Autonomy TestResetting data loss manually MI00/10056 rev.1--05/2001-- Computer Interface 11.1 AS400Remote Alarms 11.2 RS23213.1 EDP70 PLUS/24/18/12 Battery Installation/Start-up Batteries= EDP70 PLUS/24/18/12 Internal Battery Shelves 13.2 EDP70 PLUS/24/18/12 Optional Battery CubicleMaintenance and Spare Parts 13.3 EDP70 Plus above 20kVA Battery Installation/Start-up13.4 EDP70 Plus above 20kVA Battery Cubicle EDP70 Plus System LOG