ÖNORM EN 17625

This document specifies the terms and definitions, the test conditions and the test methods of rooftop units with electrically driven compressor(s), which may be equipped with a supplementary heater using electrical resistance or combustion of fossil fuel. This document covers air-to-air units with integrated indoor and outdoor fans as well as water(brine)-to-air units with integrated indoor fan(s) and integrated or not liquid pump. This document covers rooftop units with 2, 3 or 4 dampers, including several features as the free-cooling, mixing air flows (on both sides) and heat recovery. This document deals with rooftop units providing space heating and/or cooling for comfort application. Process applications are not covered by this document. This document provides the part load conditions and the calculation methods taking into account rooftop units features for the determination of seasonal energy efficiency SEER and SEERon, seasonal space cooling energy efficiency ns,c, seasonal coefficient of performance SCOP, SCOPon and SCOPnet, seasonal space heating energy efficiency ns,h and the overall annual efficiency. Such calculation methods may be based on calculated or measured values. In case of measured values, this document covers the test methods for determination of capacities, EER and COP values during active mode at part load conditions. It also covers test methods for the determination of power input during thermostat-off mode, standby mode, off-mode and crankcase heater mode. A rooftop unit that is not using at least the thermodynamic cycle for space heating is considered as a cooling only unit. For the purpose of this document, rooftop units equipped with additional air heating and/or cooling heat exchangers are rated without operation of these heat exchangers.