Warner Electric PTB-BL3 - Manual (Page 9)

9 Warner Electric • 800-825-9050 819-0368
Start Up
The powder in magnetic particle units some-
times settles during shipping and will need to be
redistributed. A simple run in procedure should
be performed to ensure proper performance.
Run in Procedure
Notes: 1. Before running in the unit, make
sure it does not bind. See step 2
(Page 3) of the Premounting instruc-
tions.
2. For clutches, the output must be
secured properly to prevent turning
if full torque is accidentally applied.
Set the control output voltage for 5 to 6 volts.
Turn off the control and run the input for one
minute. Then run the input at a speed close to,
but not exceeding, 1000 RPM. Cycle the unit at
5 or 6 volts for five seconds on and ten seconds
off. Repeat for 20 cycles.
When the powder is redistributed properly, the
torque will be consistent and proportional to
current.
Maintenance
Heat
Overheating occurs when the heat generated
exceeds the heat dissipation of the unit. Please
refer to the following table for maximum allow-
able surface temperatures.
Slip Applications
The heat generated is proportional to torque and
slip rpm. Care must be taken when adjusting
torque on the control to make sure that unit heat
dissipation capacity is not exceeded. Refer to
the sizing procedure in the catalog to make sure
the unit has adequate heat dissipation capabili-
ty. Do not increase slip speed or torque without
verifying that the unit can dissipate the heat
generated.
Cycling Applications
In cycling applications, the speed and inertia of
the load and the frequency of starting and stop-
ping determines the heat generated. Refer to the
selection procedure in the catalog to verify that
the unit can handle the thermal energy generat-
ed in your application. Do not increase the input
speed, cycle rate, or inertia without checking the
units ability to dissipate the heat generated.
Maximum Allowable Surface
Temperatures
Maximum
Cooling Allowable
Type System Temperature
POC/POB Natural 176° F
PHC-R Self-ventilated 176° F
PTB-BL3 Heat Pipe with Blower 194° F
Contamination
Do not expose the unit to water or oil. If water
or oil enters the powder cavity, the performance
of the unit may be affected. If the unit is mount-
ed next to a gearbox, special care must be
taken to prevent oil from working its way into
the unit.