HHS
Hopper Heating System Installation Instructions
DESCRIPTION
The nVent RAYCHEM Hopper Heating System (HHS) is designed for
use with Electrostatic Precipitator (ESP) hoppers, baghouse hoppers
and material / dust-collector hoppers.
It is highly recommended for all HHS heaters to be used in conjunction
with a temperature control device. These instructions describe the
procedure for installation, storage and handling of HHS heaters.
Carefully follow all directions.
For technical assistance, contact nVent at [email protected]
ADDITIONAL / OPTIONAL MATERIALS REQUIRED
The HHS heater must be installed
correctly to ensure proper operation
and to prevent shock or fire. Read these
important warnings and carefully follow
all the installation instructions.
• All electrical wiring must follow
local electrical codes. Ground fault
equipment protection must be used on
each heater branch circuit to minimize
the danger of fire if the heater is
damaged or improperly installed
and to comply with nVent design
requirements, agency certifications
and national electrical codes.
• Damaged heaters and connections
must be replaced. Do not attempt to
repair or energize if damaged. Only
qualified personnel are allowed to
connect electrical wiring. Disconnect
all supply power at the source before
making any power connections. It is
highly recommended to never operate
heaters without a temperature control
device.
• The end-user is responsible for
providing a suitable disconnecting
device.
• The end-user is responsible for providing
a suitable electrical protection device.
• Final installation / wiring is to be
inspected by the authority who has
jurisdiction in the area that the heater
is installed.
• Approvals and performance are based
on the use of specified parts only.
Do not use vinyl electrical tape or
substitute parts.
• Read and understand this entire manual
before operating this electric heater.
Leave these installation instructions
with the user for future reference.
• Failure to observe these warnings may
result in personal injury or damage to
the heater.
Read and understand this entire manual before operating or servicing these heaters. Failure to understand how to safely operate these
heaters could result in an accident causing serious injury or death. These heaters should only be operated by qualified personnel and any
individual who has not read and understood all installation instructions is not qualified to install this product. Additional copies of this
manual are available upon request.
WARNING:
WARNING:
CAUTION:
Approvals valid only when installed in accordance with
all applicable instructions,codes, and regulations.
Ordinary Locations
• Never handle the heater while it is in operation; always
disconnect the heater from the power source and allow for
proper cooling prior to handling.
• Inspect heater before use.
• If spillage of foreign matter onto the heater occurs,
disconnect from the power source and clean after the heater
is allowed to cool.
• Never operate a heater without an appropriate heat sink.
(Device being heated is considered a heat sink).
• Do not operate the heater above the rated temperature value.
• Fasten the heater to the heated surface using approved
methods only.
• Do not repair damaged or faulty heaters.
• Do not crush or apply severe physical stress on the heater or
lead wire assembly.
• Avoid hazards or unsafe practices which could result in
personal injury or property damage.
LIMITED WARRANTY
nVent offers 1 year limited standard warranty for the RAYCHEM HHS.
SAFETY ALERT SYMBOL
The symbol above is used to call your attention to instructions
concerning your personal safety. It points out important safety
precautions. It means “ATTENTION! Become Alert! Your Personal
Safety is involved!” Read the message that follows and be alert to
the possibility of personal injury.
• Wire strippers
• Cleaning / prep supplies
• Wire ties
• Mounting hardware
• Junction box
• Temperature controller
and sensor
• Silicone RTV
• High-temperature
adhesive tape
• Wrap Wound Heater
(HHS-WWH) for the
Conical Throat
• Insulating material
APPROVALS
HHS PRODUCT SPECIFICATIONS
Power density
Standard wattages up to 4650 W/m²
(3.0 W/in²)
Voltage range (nominal) 120 to 600 VAC
Maximum continuous
exposure / maintenance
temperature
260ºC (500ºF)
Maximum intermittent
exposure temperature
(power off)
538ºC (1000ºF)
Minimum installation
temperature
–20ºC (–4ºF)
Dielectric strength
Up to 2,200 VAC
Power leads
5.0m (16 ft.) long, moisture resistant, high-
temperature stainless steel overbraid with
a standard heater ground wire
Summary of Contents for HHS
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