15
JH-DC OPERATOR INSTALLATION GUIDE
CURRENT SENSING ADJUSTMENTS
Because doors vary in construction and may have different force requirements in the open and close directions to move, the
OSCO control board has separate multi-turn potentiometers for adjusting in both directions independently. The adjustment
should be set light enough to maintain minimal force (15-25 lbs.) should an obstruction occur, but high enough to keep the door
moving under normal conditions without interruption.
Prior to adjusting the operator current sensing functions, make sure the door moves freely in both directions. A badly aligned or
poorly maintained door may cause false triggering of the current sensor. Refer to page
13
when following the instructions below.
A factory adjustment tool has been supplied to make these adjustments easier. This tool has been taped to the control box for
your convenience.
CLOSE DIRECTION CURRENT SENSE ADJUSTMENT
When the door operator leaves the factory, it has been preset for a relatively light door function and will require additional
adjustment. Begin by starting the door going closed. If the operator stops and reverses, turn the close direction potentiometer
(see page
13
) one turn higher, press the
STOP
button, and try again. Repeat this process until the door no longer causes false
tripping of the current sensor. Note that each time the door operator reverses, the
STOP
button must be pressed. Next, turn the
close direction potentiometer lower slowly while the operator is running the door closed until the door operator stops and
reverses again. From this point, turn the close direction potentiometer higher by 1 1/2 turns for all 115 Volt AC and 24 Volt DC
operators, and by 3/4 of a turn higher for all 230 Volt AC operators.
OPEN DIRECTION CURRENT SENSE ADJUSTMENT
Repeat the same process with the open direction potentiometer while running the door in the open direction. Once this is done,
run the door through several complete cycles and make sure the door does not false trip in either direction.
MAXIMUM RUN TIMER ADJUSTMENT
This adjustable potentiometer sets the maximum length of time
the motor will run before shutting down. It should be configured
for the time it takes to run the door fully open or closed, plus an
additional 15 seconds. See page
13
for details.
AUTO CLOSE TIMER ADJUSTMENT
This adjustable potentiometer sets the length of time which
elapses before the door operator automatically closes the door,
from the fully open position, provided no open, reversing, or
obstruction signals are present. This feature can be turned on or
off via dip switch selection. See page
13
for details.
Do not use
the auto close timer without an appropriate reversing device
installed!
MASTER/SLAVE CONNECTION
A three-wire shielded conductor cable is required to connect mas-
ter and slave operators. You must use Belden 8760 Twisted
Pair Shielded Cable (or equivalent)
only
– OSCO part number
2500-1982, per foot). See page
13
for details of this connection,
as well as dip switch selection.
Note: The SHIELD wire should be
connected in both the master and slave operators.
In addition,
you must run power to both the master and slave operators.
BATTERY BACK-UP
FOR DC MODELS ONLY
CHARGER BOARD CONFIGURATION
To set the voltage monitor, see the picture below. The
RUN posi-
tion
will monitor the voltage of the battery only after AC voltage has
been interrupted. It will allow the operator to continue to function
until the batteries have dropped to 17 volts. When the batteries
have reached 17 volts, the operator will open and shut down until
AC power has been restored. In the
OPEN ONLY position
when
AC power has been interrupted the operator will open and shut
down until AC power is restored.
Note:
If the charger board is set to open only, removing incoming
power will cause the operator to run to full open position. Turn off
power switch in operator before removing incoming power!
VOLTAGE MONITOR SHOWN
ABOVE IN THE RUN POSITION
Multi-turn Potentiometer
Remember it is important not to set the adjustment
too high! Doing so will defeat the purpose of the cur-
rent sensing as an obstruction detecting feature.
Summary of Contents for JH-DC
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