In the process of fitting some second hand kit for a good customer the kit is mine so I know it works,sadly the evaporator has no heater elenents it's only going to run at minus two c so decided to install basic hot gas defrost as the ice build up should not be excessive,a solenoid valve in the delivery line putting hot gas into evaporator all controlled by elliwell controller suction regulator,what's the thoughts on fitting an accumulator? it's a two horse hermetic condensing unit.