Heat pump-cooling and heating capacity and capacity of compressor

[sale]

hi everybody,
can you tell me if compressor capacity is measuring and compare to a heating capacity of heat pump or cooling capacity of heat pump?
if cooling capacity is 7.5 kw,and heating capacity is 8.4 kw,what should be compressor capacity of heat pump,for example when ordering new compressor to be replaced?
Thanks

[Brian_UK]

Order the compressor to match that which is being replaced.

[Peter_1]

Swept volume must be the same

[cma]

it will be rated to the cooling capacity, as the heating capacity is generally higher due to the extra heat produced mechanically during the compressors operation(friction/heat of compression etc.) and with hermetic compressors also electrical heat. But as Brian stated best to go with the same as the original compressor,as long as it is designed correctly.Good luck