Bell & Gossett S13641B Technologic 5500 Series Pump Controller - Manual (Page 2)

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Preface
The following manual describes the new microproces-
sor based Technologic 5500 Controller. This unit is in
the tradition of the other members of the Technologic
Control Panels as it incorporates many original, novel,
and proprietary features that may only be found on
B&G controllers. Some of these features require spe-
cial emphasis here.
The controller is best described as a specific purpose
programmable pump controller. This means that the
hardware and software have been created for the con-
trol and diagnostics of pumps with consideration for
their inherent characteristics. This results in an optimum
pump controller without the cost of general purpose
control hardware. Software is dedicated and estab-
lished for the unit only after extensive testing. Changes
to this software are not taken lightly and must pass
rigid version control.
The controller has the unique analog input protection
of other members of the control family. In the event of
a short circuit condition the current limit circuitry pre-
vents failure of the analog input components.
This new controller has standard manual bypass
switches when a Bell & Gossett automatic bypass is
supplied. The manual bypass switches allow the user
to de-energize the programmable logic controller and
take manual control of the pumping system. This is
helpful during system startup to confirm pump rotation
and to purge air from the system prior to switching to
automatic control.