Intermatic K4251 Quick Start Manual

SWITCH: SPST NORMALLY CLOSED
SWITCH CAPACITY: 15 AMP TUNGSTEN 8.3 AMP BALLAST
OPERATING VOLTAGE (K4251): 120 VOLTS, 50/60 Hz.
OPERATING VOLTAGE (K4253): 208-277 VOLTS, 50/60 Hz.
OPERATING TEMPERATURE RANGE: -40˚F to 140˚F (-40˚C to 60˚C)
Risk of Fire or Electric Shock
• Disconnect power at the circuit breaker(s) or disconnect
switch(es) before installing or servicing.
• Do NOT use the OFF state of the photocontrol for equip-
ment servicing.
• Installation and/or wiring must be in accordance with
national and local electrical code requirements.
APPLICATIONS:
All night Safety and Security Lighting for walkways, entrances, parking lots, farm yard
lighting, recreational areas . . . Protective Lighting Control for homes, schools, commercial
and industrial buildings.
INSTALLATION:
Connection to junction box must be watertight. The photocontrol
can be mounted directly through a standard 1/2" knockout. Use
the included washer and nut. Alternatively, mount through a
tapped opening using suitable tape or sealant on nipple.
Mounting is recommended in the upright position with cell
facing North for optimum efficiency.
SOME HELPFUL HINTS FOR BETTER PHOTOCONTROL INSTALLATION: For best
results, the photocontrol must be installed so that the cell faces NORTH to sense only
the natural light that exists in the area.
Protect the window side of the photocontrol from any direct artificial light that may
be on after dark, from windows, signs, and the artificial light being controlled. Locate
the photocontrol in as open a spot as possible. Particularly keep it out of corners and
overhanging eaves. Wire photocontrol as indicated in wiring diagram above.
TIME DELAY FEATURE (30 seconds minimum) prevents false switching due to
temporary cloud movements or momentary flashes of lightning or car headlights.
LIGHTS WILL BE ON WHEN PHOTOCONTROL IS FIRST INSTALLED. If installed
during daylight hours, control will turn off after a short delay. When testing, it will
have a delayed response.
PROBLEM
Occasionally, lamp will not turn on after dark
Lamp switches on & off after dark
Lamp switches on & off during the day,
but stays on all night.
Lamp switches off some mornings but not
others.
All Intermatic Photocontrols are given an operational check before they leave the
factory. If they should appear not to operate, check all of the above points over a two
or three day period.
®
PHOTOELECTRIC CONTROL
MODELS K4251, K4253
WARNING
TROUBLESHOOTING TIPS
Line
Black Line
Neutral
White Neutral
SOLUTION
Artificial light may be shining on the "eye".
Shade the eye from this light.
The "eye" may be exposed to the lamp it is
controlling. Shade the eye from this light.
Line and lamp leads may be reversed.
Switch them around.
The "eye" is probably shaded too much.
Reorient or remove from the day-light
obstruction.
WIRING DIAGRAM
(black) (Red)
Red
(White)
nut and
nut and neoprene washer
neoprene
washer
1/2"nipple
1/2" nipple
Lamp
Lamp