Division 4 Seasonal space cooling energy efficiency of comfort chillers and air conditioners when driven by electric motors:

For the purposes of the measurements of air conditioners the indoor ambient temperature shall be set at 27 °C;

While establishing the sound power level, the operating conditions shall be the standard rating conditions set out in Table 16 (air-to-air heat pumps and air conditioners), Table 17 (water/brine to-water comfort chillers), Table 18 (air-to-water comfort chillers), Table 19 (water/brine-to-air heat pumps and air conditioners);

The active mode seasonal energy efficiency ratio SEER_on shall be calculated on the basis of the part load for cooling P_c(T_j ) and the bin-specific energy efficiency ratio EER_bin (T_j ), and weighted by the bin-hours the bin conditions occurs, taking into account the following conditions:

1. (1)

   the reference design conditions set out in Table 24;

2. (2)

   the European average cooling season set out in Table 27;

3. (3)

   if applicable, the effects of the degradation of the energy efficiency caused by cycling depending on the type of control of the cooling capacity;

4. (4)

   the reference annual cooling demand Q_C, shall be the design cooling load P_design,c multiplied by the equivalent active mode hours for cooling H_CE as set out in Table 29;

5. (5)

   the annual energy consumption for cooling Q_CE shall be calculated as the sum of:

   1. (i)

      the ratio of the reference annual cooling demand Q_C and the active mode energy efficiency ratio SEER_on ; and

   2. (ii)

      the energy consumption during thermostat-off, standby, off and crankcase heater mode during the season;

6. (6)

   the seasonal energy efficiency ratio SEER shall be calculated as the ratio of the reference annual cooling demand Q_C and the reference annual energy consumption for cooling Q_CE ;

7. (7)

   the seasonal space cooling energy efficiency η_s,c shall be calculated as the seasonal energy efficiency ratio SEER divided by the conversion coefficient CC, corrected by contributions accounting for temperature control and, for water/brine-to water comfort chillers, or water/brine-to-air air conditioners only, the electricity consumption of ground water pump(s);

For multi-split air-to-air air conditioners the measurement and calculations shall be based on the performance of the outdoor unit, with a combination of indoor unit(s) recommended by the manufacturer or importer.