BS EN 16905-4:2017 specifies the requirements, test methods and test conditions for the rating and
performance calculation of air conditioners and heat pumps using either air, water or brine as heat
transfer media, with gas-fired endothermic engine driven compressors when used for space heating,
cooling and refrigeration, hereafter referred to as "GEHP appliance".This European Standard only applies to appliances with a maximum heat input (based on net calorific
value) not exceeding 70 kW at standard rating conditions.This European Standard only applies to appliances under categories I2H, I2E, I2Er, I2R, I2E(S)B, I2L, I2LL, I2ELL,
I2E(R)B, I2ESi, I2E(R), I3P, I3B, I3B/P, II2H3+, II2Er3+, II2H3B/P, II2L3B/P, II2E3B/P, II2ELL3B/P, II2L3P, II2H3P, II2E3P and II2Er3P
according to EN 437.This European Standard only applies to appliances having:gas fired endothermic engines under the control of fully automatic control systems;closed system refrigerant circuits in which the refrigerant does not come into direct contact with
the fluid to be cooled or heated;where the temperature of the heat transfer fluid of the heating system (heating water circuit) does
not exceed 105 °C during normal operation;where the maximum operating pressure in the:heating water circuit (if installed) does not exceed 6 bar;domestic hot water circuit (if installed) does not exceed 10 bar.This European Standard applies to appliances only when used for space heating or space cooling or for
refrigeration, with or without heat recovery.The appliances having their condenser cooled by air and by the evaporation of external additional
water are not covered by this European Standard.Packaged units, single split and multisplit systems are covered by this European Standard. Single duct
and double duct units are covered by this European Standard.The above appliances can have one or more primary or secondary functions.This European Standard is applicable to appliances that are intended to be type tested. Requirements
for appliances that are not type tested would need to be subject to further consideration.
In the case of packaged units (consisting of several parts), this European Standard applies only to those
designed and supplied as a complete package.NOTE All the symbols given in this text are used regardless of the language used.Cross References:EN 437EN 12102EN 16905-1prEN 16905-2EN 16905-3:2017813/2013/EU811/2013/EUEN 12309-4EN 14511-3EN 14825EN 15502-2-2:2014EN 16905-5:2017EN ISO 5167-1ISO 5167-1EN ISO 5801ISO 58012009/125/ECAll current amendments available at time of purchase are included with the purchase of this document.