Figure 6-18: Ultra Nozzle Heater (UNH) Assembly
1. Retaining Clip 2. Thermocouple Ring 3. Ultra Nozzle Heater (UNH) 4. Wave Spring 5. Nozzle tip
4. Slide the nozzle heater over the nozzle housing far enough to show the retaining clip groove
on the nozzle tip.
5. Slide the thermocouple ring over the nozzle tip, onto the nozzle heater, far enough to show
the retaining clip groove on the nozzle tip.
6. Install the retaining clip on the nozzle tip and pull the nozzle heater and thermocouple ring
up against it.
CAUTION!
Mechanical hazard – risk of damage to the hot runner. Do not bend the nozzle heater wires
at a 90° angle. Do not bend the nozzle heater wires directly at the lead exit of the heater
body. The wires will crack or break over time.
7. On U750 heaters, bend the nozzle heater wires in an arc against the heater body. Make sure
each bend has a minimum 10 mm (0.4 in) radius.
Figure 6-19: Ultra Nozzle Heater - U750
1. Ultra Nozzle Heater 2. Nozzle Heater Wires
Hot Runner Installation Manual v 2.2 — March 2021 Maintenance
Removing and Installing Nozzle Heaters 81
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