CornellCookson SHN79 Series Troubleshooting guide

INSTALLATION INSTRUCTIONS
AND
OPERATION MANUAL
SHN79 Series
NEMA 7/9 HAZARDOUS AREA
Commercial and Industrial Door Operator
UL325-2010 Compliant
Continuous Duty Operators

1
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
IMPORTANT INSTALLATION INSTRUCTIONS
WARNING –To reduce the risk of death or serious injury to
persons:
1. READ AND FOLLOW ALL INSTALLATION INSTRUCTIONS.
WARNING! – Components under extreme spring tension can cause death or serious injury.
CAUTION – To reduce the risk of ignition of hazardous atmospheres, disconnect the equipment
from the supply circuit before opening. Keep assembly tightly closed when in operation.
WARNING – To reduce the risk of ignition of hazardous atmospheres, conduit seals must be
installed within 18 inches of this enclosure.
WARNING – Substitution of components may impair intrinsic safety.
2. Install only on a properly operating and balanced door. A door that is operating improperly could
cause death or serious injury. Have trained door systems technicians make all necessary
adjustments and repairs to the door before installing the operator.
3. Remove any pull ropes that may be installed on the door.
4. Unless the door operator includes an internal lock sensing system, or external electrical interlocks
are installed, remove or make all door locks inoperative, or secure locks in the unlocked position
to prevent operation with the locks engaged.
5. Install the door operator at least 8 feet or more above the floor if the operator has exposed
moving parts. If the operator must be mounted less than 8 feet (2.44 m) above the floor, then
exposed moving parts must be protected by covers or guarding. Contact the manufacturer.
6. Do not connect the door operator to the source of power until instructed to do so.
7. Locate the control station (open-close-stop push button, key station, or the like):
(a) within sight of the door, and (b) at a minimum height of 5 feet above floors, landings, steps, or
any other adjacent walking surface and (c) away from all moving parts of the door.
8. Install the Entrapment Warning Placard next to the control station in a prominent location.
9. Make sure the available power supply to be connected to the operator is of the same voltage,
frequency, phase and wattage as indicated on the nameplate of the operator.
10. Read and understand the wiring diagram of the operator and the control station and any other
equipment to be connected to the operator.

2
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
11. Always disconnect power whenever installing or servicing the door operator or door.
12. All wiring must be permanent and comply with National Electrical Code (NEC) and local code
requirements.
13. Any change in mounting position may result in a change of operator rotation and consequently in
a change of control functions. Consult factory for any changes.
14. If the operator is provided with an auxiliary chain operator, the hand chain must be kept inside the
chain bag when operating electrically.
15. For products having a manual release, instruct the end user on the operation of the manual
release.
16. The control box cover joints must be cleaned before replacing cover. Disconnect the equipment
from the supply circuit before opening. Before opening or unfastening the screws, use dry clean
cloth to wipe out the dust to cleaning the cover joints. Alternatively, the cover joints can be blown
clean with compressed air.

3
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
SPECIFICATIONS
CLASSIFICATION
[Ex ia] Class I, Division 1, Group C & D; [Ex ia] Class II, Division 1, Group E, F & G; T3C
MOTOR
Type: Continuous duty
Horsepower: 1/2 hp, 3/4 hp, 1 hp, 1½ hp, 2 hp
Speed: 1700 RPM
Voltage: 115, 230 – 1 phase
230, 460, 575 – 3 phase
230 volt 3 phase motor is suitable for use with 208 volts
(
see Wiring Diagrams and Appendix 1 for wiring change instructions
)
Current: See motor nameplate
ELECTRICAL
Transformer: 24VAC
Wiring Type: Momentary pressure open, stop, constant pressure close
(
provided standard
)
, with provision for momentar
y
pressure close*
Limit Adjustment: Linear driven, fully adjustable screw type cams.
MECHANICAL
Drive Reduction: 57:1 (1/2, 3/4, 1 & 1½ hp), 82:1 (2 hp)
Output Shaft Speed: 30 RPM (1/2, 3/4, 1 & 1½ hp), 21 RPM (2 hp)
Door Speed: 6 - 8” per sec. average (typical)
Brake: Solenoid actuated brake
Auxiliary Chain Hoist: Standard
ENTRAPMENT PROTECTION
Sensing Edge*: (Optional) Sensing device, which has compatibility to the intrinsic
safe circuit specifications as shown in the paragraph F, attached to
the bottom ed
g
e of the doo
r
.
Non-Contact Device*: (Optional) Explosion proof photo eye device with proper explosion
proof type conduit and fittings connection.
* Per the requirements of UL Standard 325, the door operator is setup for constant
pressure to close the door. As an alternative, the door may be provided with at least one
monitored sensing device that will reverse the door upon contact with, or upon detecting
an obstruction, during closing.
Notes:
1. A non-contact sensing device (photo eye) can only be used on doors up to 45 ft. wide (or
maximum rated range of device if less than 45 ft.). Use a sensing edge to provide entrapment
protection on doors over 45 ft. wide.
2. A sensing edge can be used on all doors without size restriction.

4
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
TYPES AND SIZES OF DOORS
Consult factory for details.
INSTALLATION INSTRUCTIONS
INSTALLATION POSITIONS (for 1/2hp, 3/4hp, 1hp and 1½hp)
RA
LA
RS
LS
Installation positions for larger horsepower units are similar to as shown above.
Consult factory for changes in installation positions.
NOTE: Any change in mounting position may result in a change of operator rotation and
consequently in a change of control functions. Consult factory for any changes. (LS and RA
mounting positions are LH operators, RS and LA positions are RH operators)
Operators mounted in alternate positions (LA, RA) require a straight mounting plate in lieu of
the standard bent plate.

5
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
OPERATOR MOUNTING
1. Before the operator is installed, verify that the door is properly operating and balanced.
2. Make sure the layout of the mounting holes on the bracket is correct.
3. Bolt the operator mounting plate to the door bracket plate.
4. Mount the operator base to the mounting plate.
(Figure for 1/2 hp, 3/4 hp, 1hp and 1½hp)
Mounting for larger horsepower units is similar to as shown above.
5. When the operator assembly is attached to the door bracket, be sure the door driven sprocket is
properly aligned with the operator drive sprocket before securing the driven sprocket to the shaft.
6. The bracket must provide adequate support for the operator. Prevent play between the operator
and the door shaft. The operator must be securely attached with the drive shaft parallel to the door
shaft. It may be necessary to field brace the operator/bracket.
Door
Sprocket
Operator
Drive
Sprocket
Correct
Incorrect

6
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
DRIVE CHAIN ADJUSTMENT
NOTE: Use correct type, size and proper length of roller chain.
1. Adjust the drive chain by tilting or move the operator so that there is about 1/4” of slack when the
chain is depressed.
Note: The set screws on the operator base may be used to make the adjustment. (See figure - T1,
T2 location).
2. Once the drive chain has been tightened and the base leg screws have been set, then tighten the
operator set screws.
Drive Sprocket
Drive Chain
Door Sprocket
1/4"
T1
T2

7
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
HAND CHAIN ADJUSTMENT
If the hand chain is too long, cut and reconnect the chain with the different color connecting link
provided. Completely close the connecting link so it is properly aligned.
Chain Holder
Optional

8
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
TYPICAL INSTALLATION
A
B
Illustration only, consult factory for details.
A = Input Power Connection (explosion proof conduit or fittings not included)
Using the 3/4”-14 NPT, 5 threads engaged, pitch of thread 1.814 mm conduit and fittings.
Conduit seals must be installed within 18 inches of this enclosure.
B = Intrinsically Safety Connection (explosion proof conduit and fittings are not required)
Refer to control drawing no. 3-V-R-017 as shown in the paragraph F.
Note: All conduits and fittings shall be UL Listed (EBNV/7) and follow the specifications of the
explosion proof ratings for using in Class I, Division 1, Groups C and D; Class II, Division 1, Group E,
F and G Hazardous Location.
End User/ Installer MUST follow applicable NEC requirements along with Local
requirements for Hazardous Wiring.
WARNING

9
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
LIMIT SWITCH ADJUSTMENT
Make sure the limit cams are positioned between the limit switch actuators before proceeding
with adjustments.
1. Open the control panel cover.
2. Open or close the door part way to determine the direction of travel of the limit switch cams.
3. Open or close the door to the desired position.
Disconnect power before adjusting limit switch cams.
4. While pressing the spring-loaded plate (G), which holds the limit switch cams in place, adjust the
limit switch cam (E or F) until the micro switch (C or D) clicking sound is heard.
5. If the limit switch cam cannot be rotated to its desired position, release the plate and move the
door away from the desired position, then adjust the limit switch cam to its desired position. It may
be necessary to repeat this step until the exact position has been reached.
6. Repeat step 3 and 4 for the opposite direction. Adjust close limit cams so that actuator is engaged
as door fully closes to the floor.
7. “B” is usually the sensing edge cut-off switch and can be adjusted to accommodate sensing edge
cut-off position. It is recommended that the switch position be adjusted as low as possible without
interfering with close limit switch function.
D
B
A
C
F
G
E
NOTE: “C” is usually the open limit switch and “D” is usually the close limit switch.
WARNING

10
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
WIRING INSTRUCTIONS
Disconnect power at the fuse box before proceeding with any wiring.
1. Do not install any wiring or attempt to run this operator without checking the wiring diagram located
on the inside of the control box cover.
2. Do not turn on power until you have finished making all power and control wiring connections.
3. Do not run power and control wiring in the same conduit.
4. Any wire connected to the control panel must be protected by conduit or other means to ensure
the safety and permanency of the wiring.
5. Use copper wire inside the control panel.
6. A separate fuse line of adequate capacity is needed for the operator.
7. The operator must be properly grounded. Green colored, hexagonal-head screw, suitable for No.
14 AWG wiring. Secured in base of control box as shown in the paragraph A. Surface of control
box under screw head is free of paint or provided with star washer to cut paint.
8. The control box cover joints must be cleaned before replacing cover. Disconnect the equipment
from the supply circuit before opening. Before opening or unfastening the screws, use dry clean
cloth to wipe out the dust to cleaning the cover joints. Alternatively, the cover joints can be blown
clean with compressed air.
9. For an operator, system, or external device requiring field installed wiring between a Class 2
output of an operator and an external device, the type of wiring shall be R/C (AVLV2/8), AWM, min.
22 AWG, rated 60°C, with VW-1/FT2.
Failure to properly ground the operator could result in electric shock and
death or serious injury.
Unless the operator includes an internal lock sensing system, or external
electrical interlocks are installed, remove or make all door locks inoperative,
or secure locks in the unlocked position. Failure to disable the locks could
result in damage to the door or operator.
WARNING
WARNING
WARNING

11
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
CONTROL WIRING
If the door is not visible from the control station, or if any device other than
a control station requiring constant pressure to close the door is used, a
monitored sensing device must be installed on the door. Failure to do so
could result in serious injury or death to person(s) trapped beneath the
door.
Disconnect power at the fuse box before proceeding with any wiring.
1. Locate the control station at a minimum height of
5 feet above the floor, and where the user can
clearly see the operation of the door. Mount the
enclosed placard adjacent to or near the door.
Controls shall be located far enough away from the door, or positioned
such that the user is prevented from coming in contact with the door, while
operating the controls.
2. Do not run control wiring in the same conduit as power wiring.
3. Any wire connected to the control panel must be protected by conduit or other means to ensure
the safety and permanency of the wiring.
Do not install radio controls (receiver/transmitter) to operate the door
unless some type of monitored entrapment protection device has been
installed. Failure to do so may result in death or serious injury to person(s)
trapped beneath the door.
Changing from left hand to right hand or vice versa could result in change
of control wiring. Consult factory for details.
4. After installation, be sure that the operator, controls, and sensing edge or other entrapment
protection devices have been tested and function properly.
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING

12
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
A. Control Function:
ON
OFF
Timer
TIMER
M.OP
ON
OFF
M.CL
E.OP
ON: Momentary Pressure
OFF: Constant Pressure
Open
Close
ON
OFF
Auto Open
Safety Switch
ON
OFF
ON
OFF
ON
OFF
A-2.
ON: Momentary Pressure
OFF: Constant Pressure
S10S12S11S13
123478910
2324P5P6E5E6
IR: P5&P6
L1L2L3
Three-phase power source
See operator plate for correct
voltage.
L1L2L3
L1L2
Single-phase power source
See operator plate for correct
voltage.
A-3.
A.
A-1.
7 & 8 Moving
Warning Signal
24VDC
1234789102324E5E6
P5P6
+-
ONOFF
S1
Monitored Edge Enable Switch
 Control panel is wired with momentary pressure open and constant pressure close.
 A one-second delay on reverse is standard.
 When the door is closing, pushing the “Open” or “Stop” button will stop the door from moving.
 When the door is closing, the radio control transmitter can stop and reverse the door at anytime.

13
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
B. Auxiliary Function:
Open door
Stop door
Close door
B-1.
B-2.
4 3 2 1
1. 1&2 Open limit dry contact
2. 3&4 Close limit dry contact
2 12 1
CN12 CN13 CN14
SE
24VDC MAX 0.5A
+ -
Open door
Stop door
Close door
B-1.
B-2.
SE
24VDC MAX 0.5A
+ -
Non-Monitored
Sensing Devices
(N.O. Dry Contact)
B.B.

14
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
C. Timer Instruction:
Note: Must switch Timer Switch S10 to ON to enable the timers. (See figure A-2 on page 12 for
location.)
C.
T1 T2 T3 + -
Timer 1 setup.
Down, decrease time.
Up, increase time.
C-2.
Timer 2 setup.
Timer 3 setup.
Timer 3
Door Open Warning
dry contact
CN8
BUZZER
C-1.
(1) T1 – Mid-open timer : Timer starts counting when door leaves close limit. Door stops after
opening for set time. Pressing open again at mid-open position will cause door to
open to open limit.
T2 – Timer to close : Timer is active when door stops and is not at close limit.
T3 – Door Open Warning Timer : Timer is active when door leaves close limit.
When time is up, contact will close. See figure C-1.
External timer disable switch connection – install a switch between “TIMER” wires in the IS
junction box. When the switch is open and S10 switch is ON, all timers are enabled. When
the switch is closed or S10 switch is OFF, all timers are disabled.

15
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
(2) To Set Timer 1 (Mid-open Timer):
 Turn timer switch S10 to ON.
 Press
T1
and hold for 5 seconds. Display will flash.
 Use
+
and
-
to increase or to decrease time.
 Press
T1
to save setting. Without pressing, no adjustment is saved.
+
T1 T2
Min. 1 Sec
Set the
desired time .
Max. 99 Sec
T1 T2
Mid-Open Timer
Max. 99 Sec
+-
+-
Min. 1 Sec
T1
T1
T1
T3
T3
T1
T1
T1 T2 T3 -
(3) To Set Timer 2 (Timer to close):
 Turn timer switch S10 to ON.
 Switch M.CL switch to ON. (See figure A-2 on Page 12 for location.)
 Press
T2
and hold for 5 seconds. Display will flash.
 Use
+
and
-
to increase or to decrease time.
 Press
T2
to save setting. Without pressing, no adjustment is saved.
Min. 1 Sec
T2
Min. 1 Sec
Set the
de s i red time .
T1 T2
T1 T2
Reclose Timer
T2
T2
T2
T2
T2
Max. 99 min 59 Sec
Max. 99 min 59 Sec
+-
T3
T1 T2 +- T3
+
T3 -

16
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
(4) To Set Timer 3 (Buzzer Timer):
 Turn timer switch S10 to ON.
 Press
T3
and hold for 5 seconds. Display will flash.
 Use
+
and
-
to increase or to decrease time.
 Press
T3
to save setting. Without pressing, no adjustment is saved.
Min. 1 Sec
Min. 1 Sec
Set the
desired time .
T1 T2
T1 T2
Door Open Warning Timer
T3
Max. 99 min 59 Sec
Max. 99 min 59 Sec
+-
T3
T1 T2 +- T3
+
T3 -
T3
T3
T3
T3
T3
(5) To confirm timer value:
Set Mode Set Mode
Set Mode
Select Time r
T1
T2
T3
T1 T2 +-
T3
T1 T2 +- T3 T1 T2 +- T3
T1 T2 +-
T3

17
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
D. LCD Display Instruction:
Display Status Display Status
T1
T1 setting T1 or T2 or T3
setting completed
T2
T2 setting Door closing
T3
T3 setting Door opening
E. Light Indication:
5
4
3
8
9
18
16
17
LED16 STOP Control station stop
ON: Connect with 3 button
control station and not
activate STOP button.
OFF: Not connect with 3
button control station
or activate STOP
button.
LED3 OLS Door open limit
ON: Door at open limit.
OFF: Not at open limit.
LED5 CLS Door close limit
ON: Door at close limit.
OFF: Not at close limit.
LED4 SLS AUX close Limit contact
ON: Door at AUX close limit.
OFF: Not at AUX close limit.
LED17 OPEN Open button
ON: Activated.
OFF: Not activated.
LED18 CLOSE Close button
ON: Activated.
OFF: Not activated.
C.L.S.
LED30
VVS
SAFE
CLOSE
S.L.S.
STOP
OPEN
DEVICE
O.L.S.
LED9 SAFE Sensing device
ON: Sensing device circuit activated.
OFF: Sensing device circuit ok or not
activated.
LED8 DEVICE Device light
ON: When the sensing device connected
on terminal CN2 (E5,E6/P5,P6) is
normal.
OFF: Sensing device disconnected, failed
or damaged.

18
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
F. Intrinsically Safe Connections:
Note:
 Intrinsic safe board (1) is the standard, and board (2) is the optional.
 All the input signals must be in the form of dry contact.
OPEN
CLOSE
STOP
STOP
CLOSE
OPEN
I. S
JUNCTION BOX
Follow the instructions of the wire
sleeves for external devices connections.
2022.03.03
3-V-R-017

19
SHN79 Series
REVISION # 0001
DATE: 08/01/2022
1. Associated Apparatus Entity Parameters :
Voc (or Uo) = 30 V dc
Isc (or Io) = 5.48 mA
Po = 41.14 W
Ca (or Co) = 0.066 μF
La (or Lo) = 149 mH
2. Selected intrinsically safe equipment must be third party listed as intrinsically safe
for the application, and have intrinsically safe entity parameters conforming with
Table 1 below.
TABLE 1 :
I.S. Equipment Associated Apparatus
V max (or Ui) 30 V dc
I max (or Ii) 5.5 mA
P max, Pi 32 mW
Ci + Ccable 0.066 μF
Li + Lcable 149 mH
3. External earthing connection must use minimum wire size of 14AWG.
4. Installation of intrinsically safe electrical equipment and wiring must in accordance with
the National Electrical Code (NFPA 70, Article 504 and CSA C22.1, Section 18).
5. Capacitance and inductance of the field wiring from the intrinsically safe equipment to the
associated apparatus shall be calculated and must be included in the system calculations
as shown in Table 1. Cable capacitance, Ccable, plus intrinsically safe equipment capacitance,
Ci must be less than the marked capacitance, Ca (or Co), shown on any associated apparatus
used. The same applies for inductance (Lcable, Li and La or Lo, respectively).
Where the cable capacitance and inductance per foot are not known,
the following values shall be used : Ccable = 60 pF/ft., Lcable = 0.2 μH/ft.
6. This associated apparatus has not been evaluated for use in combination with another
associated apparatus.
7. For installations in which both the Ci and Li of the intrinsically safe apparatus exceeds 1%
of the Ca (or Co) and La (or Lo) parameters of the associated apparatus (excluding the cable),
then 50% of Ca (or Co) and La (or Lo) parameters are applicable and shall not be exceeded.
The reduced capacitance shall not be greater than 1 μF for Groups C and/or D.
The values of Ca (or Co) and La (or Lo) determined by this method shall not be exceeded
by the sum of all of Ci plus cable capacitances and the sum of all of the Li plus cable
inductances in the circuit respectively. 3-V-R-017
2022.03.03