... Heat Pum -CE Certificate -High Efficiency&Muti-fuction LTWH Series High Quality Ground Source Heat Pump for Houses ... valves, filter, thermostatic expansion valve, gas-liquid separator, high pressure switch and low pressure switch.The ... controller,PID regulatorSecurityOverload, high voltage, wrong Phase, water, oil, antifreeze switch, high temperature protectionCompressorFormFlexible all closed scroll ...