Figure 6-48: Installing the Sprue Heater
1. Retaining Clip 2. Lead Exit 3. Sprue Heater and Thermocouple 4. Sprue Bushing
3. Align the thermocouple wires with the wire channels in the backing plate.
4. Install the retaining clip into the groove on the sprue bushing.
5. Pull the sprue heater up until it makes contact with the retaining clip.
NOTE:
All wiring near the sprue heater must be either a high temperature braid or sleeved using a high
temperature sleeving.
6. Route the sprue heater and thermocouple wires through the wire channels in the manifold
plate. Make sure all wiring is properly retained in the wire channels using wire clips.
7. Label each wire with the heater zone number. Refer to the electrical schematic for the zone
number.
8. Crimp the wire ends and connect them to the appropriate multi-pin connectors. Refer to the
electrical schematic for more information.
9. Test the sprue heater. Refer to Section 6.13 for more information.
10. Install the hot runner into the machine. Refer to Section 4.2.1 for more information.
6.17.4
Installing a Sprue Heater with a Separate Thermocouple
To install a sprue heater with a separate thermocouple, do the following:
1. Slide the sprue heater onto the sprue bushing. Make sure the sprue heater is below the
retaining clip groove in the sprue bushing.
v 2.2 — March 2021 Unify Manifold System
114 Installing a Sprue Heater with a Separate Thermocouple
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