Commissioning, Startup, Operation & Shutdown
TT Twin-Screw Pump -
Installation, Operation & Maintenance Manual
47
7. Make sure that everyone is clear, and then jog the driver long enough to determine
that the direction of rotation corresponds to the arrow on the bearing housing or
close-coupled frame.
8. Lock out power to the driver.
Couple the pump and driver
WARNING:
Failure to disconnect and lock out driver power may result in serious physical injury or death.
Always disconnect and lock out power to the driver before performing any installation or
maintenance tasks.
Electrical connections must be made by certified electricians in compliance with all
international, national, state, and local rules.
Refer to driver/coupling/gear manufacturer's installation and operation manuals (IOM) for
specific instructions and recommendations.
1. Check the gap between the coupling hubs against the dimensions shown on the
general arrangement drawing or as stamped on the coupling hub. For any necessary
adjustment, move the driver not the pump.
2. Motors with sleeve bearings may be manufactured with end movement (float) in the
motor rotor. If specific directions for setting the motor rotor position are not indicated
in the motor instructions, then follow this procedure:
a. Slide the motor rotor towards the DE of the motor as far as it will go and
mark the shaft at the motor frame.
b. Slide the motor rotor towards the NDE of the motor as far as it will go and
mark the shaft again.
c. Scribe a third mark on the shaft halfway between the scribe marks made in
the previous steps.
d. Adjust the driver position and/or coupling to ensure the motor rotor will be
held in that mid position when the coupling is installed.
3. Use the instructions provided from the coupling manufacturer to install the coupling.
4. Check the angular and parallel alignment of the coupling halves. See Pump-to-driver
alignment in the Installation chapter.
5. Install the coupling guard.
WARNING:
The coupling guard used in an ATEX classified environment must be constructed from a
spark resistant material
Summary of Contents for HOUTTUIN TT Twin-Screw
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