The heat pump is off to the side of the antenna wire. We used the following ways to check SWR – Youkits Antenna Analyzer, MFJ-259, Diamond SX-600 SWR Meter, and SWR meter on Kenwood TS-2000 transceiver. We did not tie back the folded over wire as you recommended – just a few turns around the main wire so that the folded back wire runs in parallel with the main wire and a turn about every six inches.
We moved the antenna so that is was about 25′ away from the heat pump – SWR readings are still bad. We put a 50 ohm dummy load on the end of the coax and the SWR was 1:1 over all the bands. Will need to get you the SWR readings that you requested.