Hussmann VRL Installation & Operation Manual page 46

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46
ErvIcE
FRAME HEATER REPLACEMENT
Always turn off power to the case before working
on any electrical components. The old wireway
covers must be removed to access the door
frame heaters. Begin by inserting a putty knife
A
into the groove between the wireway cover and
fiberglass frame, about an inch (25 mm) away
from joints in the frame as shown. Carefully
begin to pry off the cover.
Use a second putty knife or flat head
screwdriver to hold up the cover as shown in
A. Pry the remainder of the section up, using
putty knife only, until the entire cover is off
B
and the frame heater inside the door frame is
exposed as shown in B.
Door frame heaters may now be replaced.
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 C
the black lead wire.
Once the heater wire is connected, check
resistance (ohm reading) before replacing
wireway covers. This will ensure that heater
wire was not broken during installation. Wiring
diagrams are shown on the last pages of this
manual.
D
After covers are reinstalled, turn power on and
verify that heaters are working properly.
E
PN_3155541_E
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