32MMW-AP___1CHQE18-361External (Support) Line Heater InstallationsPlease be sure to install the line heater (procured locally) when HWM is installed a water freezes environment.Not installing a heater causes problems such as the HWM water heat exchanger freezing and loss of heating ability.[1] Install the heater within 5 m of the water pipe between the Hot Water Module and the water pump, and 5 m of the HWM pipeconnections.[2] Select a heater with a capacity of 40 to 50% of the rated capacity of the HWM.[3] To prevent fires caused by overheating, use a heater with safeguards such as a fuse and temperature type protective switch.IsolatingvalveAir vent valveIsolatingvalveStrainer(30 to 40 meshes)IsolatingvalvePumpProcured locallyLineHeaterCrucial heatsourceIsolatingvalve* Locally procure and install protective devices such as the heater and pump.Within 5 mHotWaterModuleExpansion vesselPressure relief valveSet: 0.3 MPa