Eaton 91PS User And Installation Manual

Also see for 91PS: User and installation guide Safety and installation quick guide Safety and installation quick guide User and installation guide

Figure 8. UPS cabinet clearances• X = clearance at the back of the UPS cabinet• Y = clearance at the top of the UPS cabinetThe basic environmental requirements for the operation of the UPS system are as follows:• Ambient temperature range: from +0 to +40 °C• Recommended operating range: from +20 to +25 °C• Maximum relative humidity: 95%, non-condensingIt is required that ventilation of the UPS room is arranged. Sufficient amount of air cooling is needed tokeep the maximum room temperature rise at the desired level:• In order to limit the temperature rise to a maximum of +5 °C, the required air flow is 600 m3/h per 1 kWof losses.• To limit the temperature rise to a maximum of +10 °C, the required air flow is 300 m3/h per 1 kW oflosses.An ambient temperature from +20 °C to +25 °C is recommended to achieve a long life of the UPS andbatteries. The cooling air that enters the UPS must not exceed +40 °C. Avoid high ambient temperature,moisture, and humidity.For ventilation requirements, see 91PS/93PS heat rejection in Table 9: Air conditioning or ventilationrequirements during full load operation.Table 9. Air conditioning or ventilation requirements during full load operationHeat rejection (BTU/h x 1,000) Heat rejection (kW)8 kW 1.17 0.310 kW 1.46 0.4Battery locations and enclosures must be ventilated to maintain the hydrogen concentration below the 4%vol safety limit. Adequate air ventilation must be provided to locations where the UPS and batteries arelocated. For the 91PS/93PS UPS 8-10 kW with internal batteries, the minimum air flow is 1.5 m3/hour andthe minimum free area of opening for inlet and outlet is 42 cm2 when natural ventilation is used. For largerbatteries, the ventilation air flow must be recalculated.EATON 91PS/93PS UPS USER’S AND INSTALLATIONGUIDEP-164000672 - 005 2023 www.eaton.eu 3300