BS EN 16905-1:2023

Gas-fired endothermic engine driven heat pumps. Terms and definitions | Status: Current

1 Scope This part of the EN 16905 series specifies the terms and definitions for the rating and performance calculation of gas-fired endothermic engine driven heat pumps for heating and/or cooling mode including the engine heat recovery, to be used outdoors. This document specifies the terms and definitions. This document is intended to be used in conjunction with the following standards:

• — EN 16905‑2:— on safety;
• — EN 16905‑3:— on test conditions;
• — EN 16905‑4:— on the requirements, test conditions and test methods;
• — EN 16905‐5:2022 on the calculation of seasonal performances in heating and cooling mode;
• — the heat pump standards, EN 14511‐2, EN 14511‑3 and EN 14825.

This document only applies to appliances with a maximum heat input (based on net calorific value) not exceeding 70 kW at standard rating conditions. This document 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 document only applies to appliances:

1. a) having gas fired endothermic engines under the control of fully automatic control systems;
2. b) having closed system refrigerant circuits in which the refrigerant does not come into direct contact with the fluid to be cooled or heated;
3. c) where the temperature of the heat transfer fluid of the heating system (heating water circuit) does not exceed 105 °C during normal operation;
4. d) where the maximum operating pressure in the:
   1. 1) heating water circuit (if installed) does not exceed 6 bar,
   2. 2) domestic hot water circuit (if installed) does not exceed 10 bar.

This document applies to GEHP appliances only when used for space heating or space cooling or for refrigeration, with or without heat recovery. This document is applicable to GEHP appliances that are intended to be type tested. Requirements for GEHP appliances that are not type tested would need to be subject to further consideration.