... Pum -CE Certificate -High Efficiency&Muti-fuction LTWH Series High Quality Ground Source Heat Pump for Houses and Commerical UseHeat Pump System:Brifly Introduction:APPLICATIONUsed ... .04.54.86.1Control SystemDedicated heat pump controller,PID regulatorSecurityOverload, high voltage, wrong Phase, water, oil, antifreeze switch, high temperature protectionCompressorFormFlexible all closed scroll ...