The water temperature of any of the cooling circuits is not high enough to heat the cabin. Therefore a high voltage PTC heater is used. I developed a custom heater while preserving the original controls and features.
HV PTC heater cable routing
It needs to be well protected and the connector must be hidden. It needs to pass the ‘needle test’ as part of the ECE R100 requirements at the inspection.
Attempt 1: fits but too boxy. Perhaps using a square cardboard package as a mockup is not such a good plan. Back to the drawing board.
Attempt 2: making the rear vent outlet first while keeping enough room for the connector.
Rear air duct air supply flap
Restoring the air duct for rear passengers. Skipped that initially but it’s cutting corners, can’t have the kids have cold feet.
Rear passenger vent flap emerging. Could modify the axle made earlier in a failed attempt for the window defrost.
Custom heater duct for rear air ready
And after some trimming, welding, bending and shrinking with the Eckold the vent channel with cover is ready.
Revisiting the high voltage cable routing
Now the context for cable is emerging. Question still is: down or up? Got some bits and pieces from local hardware store to create a ECE R100 ‘needle test’ proof high voltage cable routing solution.
Up it is!
Behind the blower in a tube (that will get an orange sleeve) through the firewall and a metal cover for the connector. Temporarily it was a metal pipe.
Later I changed that to hard plastic.
Custom heater and cover that shields the high voltage connector and cable in the interior ready.
So now it is ECE R100 regulations compliant.