Toshiba Q9+ Installation & Operation Manual page 5

Introduction
Congratulations on the purchase of the Q9 Plus Adjustable Speed Drive!
The Q9 Plus Adjustable Speed Drive (ASD) is a solid-state AC drive that features Toshiba International
Corporation's (TIC) Virtual Linear Pump Technology, Time-Based Alternation, and Vector Control
algorithms. These algorithms provide easy setup, enhanced reliability, and precise control under the
most demanding conditions — all while enabling the motors of the system to develop high starting torque
and providing compensation for motor slip. The result is smooth, quick starts and highly efficient
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operation. Additionally, as a BACnet -compatible device, the Q9 Plus ASD supports interoperable HVAC
systems.
Virtual Linear Pump Technology was designed to remove the guesswork that is normally associated with
the setup of pumping systems. It allows for pump curve responses that are direct, linear, and precise at
any flow or pressure setting. Eliminating the normal concerns of the adverse effects of conventional
pumping system control response curves, Virtual Linear Pump Technology allows the system to adapt
seamlessly and easily to peak load demands while maintaining the same degree of high performance
output and reliability across the entire load range — all without any user intervention!
Time-Based Alternation provides a more evenly-spread machine wear pattern for all motors and pumps
of the system by optimizing load sharing such that all pumps are allowed to alternate as the primary
pump while the remaining pump(s) operate in an ancillary mode for time intervals that are determined by
the user. Time-Based Alternation also offers a significantly decreased level of system down-time during a
pump failure by allowing the system to operate, albeit with a diminished capacity.
The Q9 Plus ASD is a very powerful tool, yet surprisingly simple to operate. The user-friendly Electronic
Operator Interface (EOI) of the Q9 Plus ASD has an easy-to-read LCD screen and a high-intensity LED
display. The EOI provides easy access to the many monitoring and programming features of the Q9 Plus
ASD.
The Q9 Plus ASD uses digitally-controlled pulse width modulation. The programmable functions may be
accessed via the easy-to-use menu, via the Direct Access Numbers (see pg. 73), or using
communications via a host PC. Easy system access to the monitoring and control features combined with
Toshiba's high-performance software delivers unparalleled motor control precision and reliability.
This manual has been prepared for the installer, user, and maintenance personnel.