Parker Compact EHA - Special Tools; Safe Operating Procedures; Operation

6
Instruction Manual
Compact EHA
Bulletin HY22-3200B
Parker Hannifin
Oildyne Division
Commissioning and Safety
Start-Up Procedures
Fuse protection can be added to the wiring circuit if
desired. Use a slow blow fuse so it will not be tripped from
the inrush current. Make sure the fuse is sized above the
maximum requirement for the application and below the
maximum available from the power supply. See Figure 7
for approximations of maximum amperage based on basic
congurations.
The following is the standard operation of the Parker Compact
EHA and can be considered as a functional test for unit at the
completion of installation or at any time during usage:
1. With the unit fully installed, actuate the extend switch for
2 seconds and release. The rod should stop and lock in
position.
2. Press and hold the extend switch until the rod reaches the
end of the stroke. When rod stops, release switch. The
motor should turn off and the rod should lock in place.
3. Actuate the retract switch for 2 seconds and release. The
rod should stop and lock in position.
4. Actuate the retract switch until the rod fully retracts into the
cylinder. When rod stops, release switch. The motor should
turn off and the rod should lock in place.
If required, any tests for radiated and conducted emissions
should be performed in accordance with the Electromagnetic
Compatibility (EMC) Generic Emission standards for
environments appropriate to the end use product to conrm
compliance with the EMC Directive.
If required, any tests for radiated and conducted immunity
should be performed in accordance with the Electromagnetic
Compatibility (EMC) Generic Immunity standard for
environments appropriate to the end use product to conrm
compliance with the EMC Directive.
Special Tools
No dismantling, service or maintenance is recommended for
EHA so no special tools are required.
Safe Operating Procedures
Should a failure of the electrical power supply occur, power
should not be returned to these power units without a
conscious action by the operator.
The power switch must be de-activated once the rod reaches
either end of stroke. If not, the pressure will build and run over
the relief valve which may cause the motor to trip the thermal
overload and shut down.
In the unlikely event of sound levels exceeding 70 dBA it is
recommended that hearing protection should be worn. If
sound levels exceed 80 dBA it is necessary to take measures
to reduce sound levels. This is normally achieved by placing
machinery in an acoustically lined enclosure.
Motor Voltages for EHA will be 12 VDC or 24 VDC. If these
motors are operated at Voltages other than those specied, the
life expectancy and safety of these units cannot be guaranteed.
Operating temperature requirements:
-34°C to +65°C (-30°F to +150°F)
The EHA unit must not be operated on a duty cycle or
stroke frequency that exceeds those identied in Operation
instructions. When necessary, cooling must be provided to
ensure that the temperature of the internal uids used never
exceed suitable temperatures for operation.
The Parker Compact EHA can support a load for a nite time
determined by the loads and operating conditions of the
application. There is no guarantee that an EHA will hold a load
indenitely and some creep should be anticipated.
Removal From Service
If for some reason, the EHA must be removed from service,
follow these instructions:
1. Wear protective eye gear.
2. Remove electrical power from the motor.
3. Mechanically hold or block the load held by the actuator
should there be any movement once pressure is relieved.
4. Only after the load is mechanically held in place, remove the
EHA.
5. When reinstalling the EHA, follow all the procedures and
startup instructions given previously.
Operation
Suitable lighting requirements for operation of this unit are the
responsibility of the machine manufacturer.
See Figure 8 for performance curves to identify parameters
of operation and Figure 9 to identify motor duty cycle
characteristics.
Operation of Manual Release Option
Manual release functionality is provided as an option for the
Parker Compact EHA. This feature is intended for infrequent
emergency use only. It is NOT intended to provide functionality
for regular operation.
To engage the manual release, turn the assembly in a counter-
clockwise direction using the slot on the end of the assembly.
Turn the release until it cannot turn any more. This will release
the pressure in the unit so that the actuator rod can be manually
moved in and out.
To disengage the manual release and continue regular
operation, turn the assembly in a clockwise direction until it
won’t go any further. Provide power to the motor, pressure will
rebuild and the unit will operate as usual.
Dismantling the Parker Compact EHA
will void any warranty.
THE PARKER COMPACT EHA
SHOULD NOT BE DISMANTLED.
Manual
Release
location