Thrush Pressurizer-VS PB-VSI Series - Manual (Page 15)

Section 5
Maintenance Information
5.1 Maintenance Information
The information in this section details the proper maintenance procedures for the
components of the Pressurizer-VS. Because this manual serves multiple models of
Pressurizer-VS, the information may be general in some instances. If there are any
questions concerning maintenance procedures that are not clearly explained in this
manual, contact your representative. The design simplicity of the Thrush Pressurizer-VS
results in a minimum of required maintenance.
Electrical Components: The VFD, pressure switch, and pressure transmitter should
require only periodic inspection to avoid possible problems such as loose connections,
worn contacts, etc. Refer to Section 6 for wiring of components.
Pump Seal Replacement: A Cartridge Seal Kit includes the mechanical seal, a pump
body gasket and installation instructions.
Pump Motor: Consult the motor manufacturer maintenance manual via their website for
recommended maintenance intervals. Refer to the motor nameplate for manufacturer
and model number.
VFD to Motor Compatibility: The VFD on the Pressurizer-VS has parameters
programmed specifically for the make and model of the motor originally installed by
Thrush.
Motor Rotation: The VFD to motor wiring is factory checked to ensure proper motor
rotation. If the drive is disconnected from the motor, proper rotation should be verified
before returning the Pressurizer-VS back to full service conditions. See Figure 6-1-2
(ABB) or 6-2-2 (Yaskawa) for proper wiring terminals that dictate rotational direction.
VFD output is not phase sensitive to the supply phase. Reversing the power wires
feeding the VFD will not change rotation. To change rotation, reverse two wires from
VFD to motor. See Figure 6-1-2 (ABB) or 6-2-2 (Yaskawa).
5.2 Replacement Parts
Replacement parts for the Pressurizer-VS are available through your representative.
Thrush Co.
Manual #9636-1400
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