hussmann INNOVATOR P/N 0425683F - Manual (Page 12)

During installation, the white portion of the
heater should not come in contact with itself. The
heater should be installed so that only one white
portion of the wire enters the raceway. The other
portion entering the raceway will be the black
lead wire. Once the heater wire is connected, check resist-
ance (ohm reading) before replacing wireway
covers. This will ensure that heater wire was not
broken during installation.
After covers are reinstalled, turn power on and
verify that heaters are working properly.
P/N 0425683F ®
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Figure 18. Replacing Door Frame Heaters