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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

Page 1: ...TOR INSTALLATIONMANUAL January 2006 Rev 6 OPERATORSPECIALTYCOMPANY INC P O Box 128 Casnovia MI 49318 OSCO requires the use of a reversing edge or photoelectric control for pedestrian protection on all...

Page 2: ...ION The speed reduction is achieved by means of heavy duty sprockets and a roller chain which has been prelubricated at the factory LIMIT SWITCHES The limit switches are actuated by rotary motion of a...

Page 3: ...procket onto drive shaft and tighten set screw securely 6 Now position door shaft sprocket so it is exactly in line with the drive sprocket and tighten set screw securely 7 Slide 1 shaft collar onto d...

Page 4: ...wall construction prohibits the use of through bolts lag bolts and shields of sufficient size may be used At this point hand tighten the bolts only DRIVE CHAIN INSTALLATION 1 Slide the door sprocket a...

Page 5: ...eaded shaft Once the open limit nut is set repeat the above process for the close direction nut and LSC 1 limit switch After finishing the initial limit nut adjustments reposition the door to approxim...

Page 6: ...llation Adjust the torque limiter tight enough to keep it from slipping during normal operation To adjust the torque limiter in the Model JH DC 1 Loosen the jam nut 2 To increase the output turn the a...

Page 7: ...24VDC Over 350 ft use DC power 0 2000 14 Volts Maximum Distance ft Wire Gauge MODEL JH DC g n i r i W r e w o P s t l o V P H e c n a t s i D x a M l a u D e l g n i S e r i W e g u a G V 5 1 1 2 1 P...

Page 8: ...and ex pired This can be caused by having the timer set too low if a chain or belt is broken or if a sprocket or pulley is slipping When the timer expires the door stops and the stop button must be pr...

Page 9: ...9 JH DC OPERATOR INSTALLATION GUIDE CONTROL and ACCESSORY CONNECTION ILLUSTRATIONS...

Page 10: ...10 JH DC OPERATOR INSTALLATION GUIDE CONTROL and ACCESSORY CONNECTION ILLUSTRATIONS...

Page 11: ...11 JH DC OPERATOR INSTALLATION GUIDE CONTROL and ACCESSORY CONNECTION ILLUSTRATIONS...

Page 12: ...12 JH DCOPERATORINSTALLATIONGUIDE CONTROLandACCESSORYCONNECTIONILLUSTRATIONS 1 06 6...

Page 13: ...he auto close timer off on 2 This switch is used in conjunction with alarms and flashing lights that may be added to the operator When the switch is in the ON position these devices will start approxi...

Page 14: ...ould the door be restarted and the signal occur again prior to reaching a limit the door will stop again and this time will sound the emergency alarm and lock out 4 51 CLOSE This function works exactl...

Page 15: ...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 sho...

Page 16: ...lable the operator will continue to operate in battery only mode if the charger board is set in its RUN mode see Battery Backup Charger Configuration Accessories wired into the operator will continue...

Page 17: ...OP This indicator is lit when a shadow hold open signal is present This signal is generated by a loop detector wired to the shadow loop terminals These indicators are lit when the open limit switch is...

Page 18: ...18 JH DC OPERATOR INSTALLATION GUIDE...

Page 19: ...19 JH DC OPERATOR INSTALLATION GUIDE...

Page 20: ...20 JH DC OPERATOR INSTALLATION GUIDE...

Page 21: ...21 JH DC OPERATOR INSTALLATION GUIDE MODEL JH DCMECHANICAL PARTS EXPLODED VIEW...

Page 22: ...procket 41 B 9 5 8 bore 9B 2110 730 Clutch Hub with Shaft Assembly 9C 2300 168 Clutch Disc 9D 2220 026 Double Pulley 7 with Bearing 2200 230 Bearing 7 8 OD x 5 8 ID x 1 1 2 LTB 9E 2400 066 Flat Washer...

Page 23: ...t Wire Harness Assembly 11 2500 071 Terminal Strip 16 141 12 2510 249 Input Wire Harness Assembly 13 2500 2127 DC Charger Board REF NO PARTNO DESCRIPTION 14 2500 2018 15 Amp Fuse 15 2500 2019 20 Amp F...

Page 24: ...has two brushes one on each side Original brushes are approximately 3 4 long and should be replaced when they are 1 4 long or sooner If brushes are allowed to wear beyond this point permanent damage...

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