11.2 Tubular Heater Installation and
Replacement
WARNING
Heater elements should be installed by qualified personnel.
The heater element and heated block must be connected and grounded
during maintenance according to local electrical standards, e.g. DIN EN
60204-1 or NFPA79.
CAUTION
Do not use a metal hammer, it will damage the heater and the manifold
surface.
CAUTION
For Field Replacement of Ø 8.0 mm and Ø 8.5 mm Flexible
Heaters Only
Mold-Masters
only recommends field replacement of Ø 8.0 mm (0.31 in.)
and Ø 8.5 mm (0.33 in.) flexible heater elements. We do not recommend
field replacement of heater elements that are brazed or pasted into the
manifold. For these types of heater elements, please contact your service
representative.
11.2.1 Storage
• Heater elements should be stored at room temperature and in a dry
atmosphere.
• The heater element insulation material attracts and hold moisture. If there
is a chance it has been exposed to high humidity during storage, then the
insulation resistance should be confirmed prior to installation
(R
min
= 5 MΩ at 500 V DC). If necessary, heating elements should be dried
at a temperature of 120°C (250°F) for a few hours.
11.2.2 Removing a Heater Element
1. Disassemble wires and ceramic terminal connector from the failed heater
element. Label the wires to identify them for re-assembly.
2. Use pliers to lift the heater element’s exit portion and insert a brass stick
below the heater element. Pull the heater element out of the groove while
prying it up with the brass stick.
3. Clean the manifold heater element groove with a brass brush and make
sure there is no contamination or sharp edges.
11.2.3 Installing a New Heater Element
4. Prior to installation, check the General Assembly drawings for the correct
heater element size and confirm the replacement conforms.
5. Check that the connection voltage does not exceed the heater element’s
operating (nominal) voltage.
11-3
© 2020 Mold-Masters (2007) Limited. All Rights Reserved.
MAINTENANCE
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