Specifications

The Hot-One System
D-M-E Runnerless Molding Systems
69
Typical configurations
Ancillaries - Tubular Manifold heaters
The Hot-One Manifold
D-M-E
ETC 0168 X
D-M-E
ETC 0168 X
D-M-E
ETC 0168 X
D-M
-E
ETC 0168 X
D-M-E 's tubular heaters are the most versatile heater elements
to economically provide efficient heat transfer. Their imple-
mentation contributes greatly to the design of a balanced and
reliable manifold system.
Depending on the application, tubular heaters can be manu-
factured into many shapes: straight, U-shape,
circular, hairpin,
W-shape. This feature allows the design of higher wattage
systems where watt density is a limiting factor. A thorough
heat transfer analysis is required to make a success of each
application.
The design of a tubular heater system is based on variables
such as: temperature limits, power requirements, space limita-
tions, medium to be heated, and heated length.
The heated length may not extend into a sharp bend area.
D-M-E 's tubular heaters have proven to be durable and relia-
ble. They are available in a large variety of dimensions.
Safety
Electrical heaters are inherently dangerous! Care should be taken to
read and completely understand the installation and maintenance
manual before installing and wiring the heater. Any installation and
maintenance performed on the heater shall be done by a qualified
electrician, in accordance with the electrical codes as they apply. It is
the user’s responsibility to ensure that the heater being used is pro-
perly selected and installed in the application.
The Caution Symbol (exclamation point) alerts you to a “CAUTION”, a
safety or functional hazard which could affect your equipment or its
performance.
The Warning Symbol (lightning bolt) alerts you to a “WARNING”, a
safety hazard which could affect you and the equipment.
Installation
Proper heater installation will result in efficient heat
transfer, safe operation, and long heater life.
1. Megohm precheck :
During shipping and/or storage, the possibility of moisture absorp-
tion by the insulation material within the element is possible. To
ensure proper megohm values a minimum 500 VDC megohm
meter (Megger) should be used to ensure that the megohm rea-
ding between the heater terminal and the heater sheath is more
than 10 megohms when the unit is at room temperature.
If a low megohm value exists, two alternative methods can be
used to remedy the situation. The best method is to remove all
terminal hardware and bake out the heater at no higher than 120
°C overnight or until an acceptable reading is reached. The se-
cond method is to energize the unit at low voltage in air until the
megohm is at an acceptable reading.
2. Protection of heater elements from over temperature :
The use of temperature controls to regulate heating process and
prevent heater over temperature is highly recommended to ensure
safer heater operation. It is the user’s responsibility to ensure
safety of the installation.
3. Make sure that the electrical leads connecting the heaters to the
temperature control unit, have a sufficient caliber.
Sheath
Performance capability: maximum temperature of 872 °C.
Sheath is made of corrosion resistant steel.