This High Bay light is designed for illumination of industrial locations. It uses the latest in solid state
lighting technology for long life, low maintenance, and high efficiency.
The unique optical design focuses light downward to where it is needed, giving improved efficiency
over a conventional HID luminaire.
An internal, universal input, power-factor-corrected switch-mode supply allows it to be used from
any nominal 100V-277V, 50/60Hz AC supply without any variation in light output.
Models HBC8C3G, HBC8C4G, HBC9C3M and HBC9C4M are suitable for use in the following
locations:
•HAZARDOUS LOCATIONS: CLASS I DIV 1 & 2 GROUPS C, D
CLASS II DIV 1 & 2 GROUPS E, F, G
Ta - Ambient Temp: -40 TO +65°C
Temp Rating – T5
•SUITABLE FOR WET LOCATIONS
Note: Save these instructions for future reference.
2: Installation
Warning:
To avoid the risk of fire, explosion, or electric shock, this product should be installed, inspected,
and maintained by a qualified electrician only, in accordance with all applicable electrical codes.
Warning:
To avoid electric shock:
•Be certain electrical power is OFF before and during installation and maintenance.
•Luminaire must be connected to a wiring system with an equipment-grounding conductor.
Warning:
To avoid explosion:
• Make sure the supply voltage is within the luminaries’ voltage rating.
• Ensure the marked T Rating is less than the ignition temperature of the Hazardous Atmosphere.
• Do not operate in ambient temperatures above those indicated on the luminaire nameplate.
• Do not operate if the lens is cracked or damaged. All fasteners should be properly seated.
For supply connections use wire rated for at least 110ºC
Recommended mounting height: 25-40 feet
•For maximum long term reliability and light output, the light must be installed in free air.
oThe High Bay fixture design incorporates an over-temperature control circuit that
reduces input power should internal temperatures reach a maximum level. In this
event, light output may be reduced.
•The High Bay fixture is threaded for 3/4” NPT in order to be assembled to conduit.
oThe necks of these fixtures are filled with Chico in accordance with the C1D1
explosion proof regulation (Chico can not be seen from ¾” NPT entrance). Plan
your Chico fittings and conduit accordingly.
oCalculate and measure required conduit length.
oFeed the power cord (max length of power cord = 10’) through the conduit and into
the junction box.
oAttach the fixture to the conduit using conductive pipe sealant.
oTighten 1/4-20 anti-rotational screw in order to secure the fixture to the conduit.
•Connect power cable conductors as follows:
oGreen to Safety Ground.
oWhite to Neutral
oBlack to Live
•Restore power and verify operation.
BASE OF ENTRANCE
(CANNOT BE SEEN)
Interfacing to an Occupancy Sensor:
The Dialight High Bay fixture is ideally suited for control by an occupancy sensor in order to
maximize energy savings based on its instant-on behavior and low power consumption.
Instructions for connecting the High Bay fixture to an occupancy sensor are listed below.
WARNING: TO BE INSTALLED AND/OR USED IN ACCORDANCE WITH APPROPRIATE
ELECTRICAL CODES AND REGULATIONS.
WARNING: CONTROLLING A LOAD IN EXCESS OF THE SPECIFIED RATINGS OF THE
OCCUPANCY SENSOR COULD DAMAGE THE UNIT AND POSE RISK OF FIRE, ELECTRIC
SHOCK, PERSONAL INJURY, OR DEATH. CHECK LOAD RATINGS TO DETERMINE THE
UNIT’S SUITABILITY FOR YOUR APPLICATION.
NOTE: SEE OCCUPANCY SENSOR INSTALLATION INSTRUCTIONS FOR ADDITIONAL
INFORMATION.
1) WARNING: TO AVOID FIRE, SHOCK OR DEATH, TURN OFF POWER AT CIRCUIT
BREAKER OR FUSE AND TEST THAT THE POWER IS OFF BEFORE WIRING.
2) Install occupancy sensor as per sensor instructions to provide desired coverage of area.
3) Connect luminaire wires per wiring diagram as follows: Black lead to load of the occupancy
sensor, White lead to the line (neutral), Green lead to earth ground. Multiple fixtures may
be connected to a sensor, as long as the rated load of the sensor is not exceeded.
4) Restore power at circuit breaker or fuse.
5) Verify operation of system. If the light will not turn on, check the operation of the fixture
and sensor individually, and check that the wiring is done correctly. If the light will not turn
off or turns off and on quickly, see the sensor’s installation instructions for further guidance.
3: Maintenance
•To avoid personal injury, disconnect power to the light and allow the unit to cool down
before performing maintenance.
Warning: No user serviceable parts inside of fixture. Risk of electric shock. Removal of the
lens will void the warranty.
1) Perform visual, mechanical and electrical inspections on a regular basis. We recommend
routine checks to be made on a yearly basis. Frequency of use and environment should
determine this. It is recommended to follow an Electrical Preventive Maintenance Program
as described in NFPA 70B: Recommended Practice for Electrical Equipment.
2) The lens should be cleaned periodically as needed to ensure continued photometric
performance. Clean the lens with a damp, non-abrasive, lint-free cloth. If not sufficient, use
mild soap or a liquid cleaner.
3) Inspect the cooling fins on the luminaire to ensure that they are free of any obstructions or
contamination (i.e. excessive dust build-up). Clean with a non-abrasive cloth if needed.
All statements, technical information and recommendations contained herein are based on information and
tests we believe to be reliable. The accuracy or completeness thereof is not guaranteed. In accordance with
Dialight Corporation “Terms and Conditions of Sale”, and since conditions of use are outside our control, the
purchaser should determine the suitability of the product for his intended use and assumes all risk and liability
whatsoever in connection therewith.