Rapid-Air PALLET MASTER (PMD) HIGH SPEED: 35, 50 & 100 SERIES - Manual (Page 10)

Safety Warning - Please Read Carefully
Improper installation practices can cause equipment malfunction or serious physical injury.
This equipment must be installed, adjusted, and serviced by qualified electrical maintenance
personnel familiar with the construction and operation of the equipment and the hazards in-
volved. It is the responsibility of the individual installing the control to take diligent care dur-
ing installation. Compliance with the National Electrical Code, any and all sound pertinent lo-
cal electrical and safety codes, and the Occupational Safety and Health Act (OSHA) is required.
All exposed points on the control circuit board are HOT with respect to earth ground. The
chance of electric shocks, fires, or explosions can be reduced by giving proper consideration to
grounding, thermal and over-current protection, type of enclosure, and maintenance procedures.
These controls are NOT fail-safe. Control may cause the motor to run at full speed. The Speed
Adjust Pot and the Regen Stop Circuit will be ineffective in these situations. BE SURE to pro-
vide an independent and positive means for disconnecting incoming AC power under emer-
gency conditions.
General Considerations
Install in an area protected from dirt, moisture, and accidental contact. Provide adequate clear-
ance for connection of wiring and adjustment of the controls. Do not mount the controls near
other heat producing objects or in areas subject to excessive cold or vibration. Allow for ade-
quate ventilation to maintain the ambient temperature within 10 to 50 degrees C.
Connections
The AC line, armature, and field circuits should be wired with 16 Ga or larger stranded wire.
The Speed Adjust Pot Circuit may be wired with 18 GA stranded wire.
Connections are to screw-type terminal blocks.
WARNING - These controls are not isolated from earth ground. Unless an isolation trans-
former is used, circuit components are at a potential of 115 (or 230) volts above ground.
Speed Adjust Pot
DO NOT bundle the potentiometer leads or signal leads with any other load carrying wiring. If
the potentiometer leads are over 18 inches in length you must use shielded wire to avoid erratic
operation. If shielded wire is used, ground it at the Speed Control end only and not at the po-
tentiometer end.
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