4.4.3 Parent Machine Lockout Circuit
Two variations of the parent machine lockout circuit are available
for the KB melt units:
• The first variation allows the parent machine to lock out the
melt unit by controlling the melt unit's pump motor. A pair of
contacts, furnished by the parent machine, is connected into the
melt unit between terminal block locations TA-9 and TA-9a.
Jumper #3 must be removed. After the contacts have been
connected and the jumper removed, the melt unit's pump motor
is only operational when the parent machine is in use.
• The second variation must be ordered as a kit from
the melt unit has reached an acceptable operating temperature.
The kit contains a thermostat that is mounted to the tank's base
plate. The two leads from the thermostat must be connected
between two unused terminals on the terminal block. The
unused terminals should then be labeled by the user to TA-30
and TA-31 for reference. The kit order number for a thermostat
rated at 250 °F is 79068-265. For other temperature options
© Copyright Astro Packaging 2009 KB30, KB50 and KB100 Series Hot Melt Units 19600-159 Rev. A 04/09/09 15
Astro Packaging. This variation locks out the parent machine until
please contact an Astro Packaging sales representative.
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