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INSTALLATION INSTRUCTIONS
62-0074-1
C7057
Cadmium Sulfide Photocell
APPLICATION
The C7057 Cadmium Sulfide Photocell is used to sense
ambient light levels. It is used as the sensing element for
the CR7075A Lighting Controller which can provide
on/off control of two separate lighting banks based on
user determined ambient light intensity levels. Typical
applications include outdoor cosmetic and parking lot
lighting in fast food restaurants retail establishments,
supermarkets, banks and lighted billboards.
INSTALLATION
When Installing this Product...
1.
Read these instructions carefully. Failure to follow
them could damage the product or cause a
hazardous condition.
2.
Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3.
Installer must be a trained, experienced service
technician.
4.
After installation is complete, check out product
operation as provided in these instructions.
Dimensions (Fig. 1)
Fig. 1. C7057 approximate dimensions in in. (mm).
Before Installation
IMPORTANT
Expose the photocell to light for 16 hours.
The photocells develop a hysteresis (or “light memory”)
when packed for shipping. Until the photocell has been
exposed to bright light for at least 16 hours, light level
setpoints will shift.
Location
Locate the photocell sensor so that the lens is exposed
to full daylight. (See Fig. 2.)
NOTES:
—
Select an area which will not become shaded.
—
Mount
only
with light entrance facing
horizontally.
—
Avoid overexposure to direct east/west
sunlight.
Mounting
IMPORTANT
Mount the photocell sensor to the top of a
watertight, outdoor FS junction box.
1.
Use the gasket provided to prevent moisture entry.
2.
Screw stem into 1/2-14 threaded knockout.
NOTE: The photocell sensor can be mounted in a
7/8 in. hole (or knockout).
Wiring
CAUTION
Electrical Shock or Equipment Damage
Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
IMPORTANT
• All wiring must agree with applicable codes,
ordinances and regulations.
• When wiring the input power, apply only one
source of power to the CR7505A.
• With line-voltage loads, the power and load
voltage must be the same.
Refer to chart on the inside of the controller cover or
Fig. 3 for locating the power inputs, photocell sensor
inputs, TOD and load relay terminals.
3/4 (19)
13/16
(21)
2-1/8 (54)
3 (76)
1-9/16
(40)
1-9/16 (40)
M20078
62-0074.fm Page 1 Friday, March 18, 2005 4:17 PM
