EN 12309-7:2014

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Test conditions
5 Calculation of the seasonal
  performance in the heating mode
6 Standard rating conditions of gas driven
  sorption heat pump based hybrid heating
  appliances
Annex A (informative) - Estimation of the
        heating fluid inlet and outlet temperature
        into/out of the indoor heat exchanger
Annex B (informative) - Inlet temperature
        into the outdoor heat exchanger for
        ground heat sourced sorption heat pump
        based hybrid heating appliances
Annex C (informative) - Inlet temperature into
        the outdoor heat exchanger for solar sourced
        sorption heat pump based hybrid heating
        appliances
Annex D (informative) - Inlet temperature of
        the outdoor heat exchanger for solar
        collector assisted sorption heat pump
        based hybrid heating appliances
Annex E (informative) - Calculation of the seasonal
        gas utilization efficiency with partial heat
        demand coverage by the applied solar collectors
Annex F (informative) - Estimation of the seasonal
        performance of hybrid heating appliances at
        building design loads deviating from the
        appliance's nominal heating capacity
Annex G (normative) - Calculation of the seasonal
        space heating energy efficiency for hybrid
        gas-driven sorption heat pump based heating
        appliances
Annex ZA (informative) - Relationship between
         this European Standard and the requirements
         of Commission Regulation (EC) No 813/2013
Annex ZB (informative) - Relationship between this
         European Standard and the requirements of
         Commission Regulation (EC) No 811/2013
Bibliography

1.1Scope of EN 12309 Appliances covered by this European Standard include one or a combination of the following:-gas-fired sorption chiller;-gas-fired sorption chiller/heater;-gas-fired sorption heat pump.This European Standard applies to appliances designed to be used for space heating or cooling or refrigeration with or without heat recovery.This European Standard applies to appliances having flue gas systems of type B and C (according to CEN/TR 1749) and to appliances designed for outdoor installations. EN 12309 does not apply to air conditioners, it only applies to appliances having:-integral burners under the control of fully automatic burner control systems,-closed system refrigerant circuits in which the refrigerant does not come into direct contact with the water or air to be cooled or heated,-mechanical means to assist transportation of the combustion air and/or the flue gas.The above appliances can have one or more primary or secondary functions (i.e. heat recovery - see definitions in prEN 12309 1:2012).In the case of packaged units (consisting of several parts), this standard applies only to those designed and supplied as a complete package.The appliances having their condenser cooled by air and by the evaporation of external additional water are not covered by EN 12309.Installations used for heating and/or cooling of industrial processes are not within the scope of EN 12309.All the symbols given in this text should be used regardless of the language used.1.2Scope of this Part 7 of EN 12309This part of EN 12309 deals particularly with the specific provisions of hybrid heating appliances based on gas-driven sorption heat pumps as defined in Part 1.The heating appliances covered by this European Standard are of a hybrid type, an encased assembly or assemblies combining a direct or indirect-fired sorption heat pump for base load and a peak load condensing boiler with only one flue system, electrical supply cable and human machine interface to the end user. The direct- or indirect-fired sorption heat pump integrated in the hybrid appliances in this European Standard could be intermittent or continuously operating ab or adsorption heat pump.The control system of hybrid heating appliances decides on the transition between the heat pump operation mode to/from the mixed operation mode (heating by both sorption heat pump as well as the peak boiler) and the direct heating mode (only peak boiler) depending on the heating fluid inlet or return temperature, temperature of brine entering the indoor heat exchanger (evaporator) of the heat pump, the required outlet or supply temperature dependent on the outdoor temperature as well as the target value of the indoor or room temperature. Upon transition from the heat pump operation mode to the mixed operation mode, the control system decides also on the degree of mixing based on the above mentioned parameters.