Specifications

Catalog WSC/WDC-4 15
Control Features
Chillers Feature MicroTech II
®
Controls
McQuay has incorporated the latest microprocessor technology into the MicroTech II control
system to give you the ultimate in chiller control. The control includes many energy-saving
features to keep your chiller running efficiently . . . day in, day out, for years to come.
Figure 3, Unit Controller and Operator Interface Touch Screen
The unit controller and operator
interface touchscreen mounted on a
chiller unit are shown to the right.
The 12-inch VGA touch screen is
on an adjustable arm so that it can
be positioned comfortably for each
operator. The control panel
contains a USB port from which
trend data and manuals can be
conveniently downloaded. All-
important unit operating data is
easily accessed and viewed.
Password protected unit setpoints,
complete with description and
setting range, are available at the
touch of a screen.
Figure 4, Compressor Controller
A major feature of the
MicroTech II controller, as
applied to chillers, is the
distributive control scheme. The
picture to the right shows the
compressor control panel (with
cover removed) mounted at the
rear of the unit, adjacent to the
compressor itself. This panel
also contains the oil pump
contactor and overload. Model
WDC dual compressor chillers
have two such panels. Also on
the pLAN (control network) is
the unit controller and operator interface touch screen. If the interface touch screen and/or unit
controller is out of service, the chiller can continue to operate on the compressor controller alone.
This feature provides unprecedented reliability in a chiller control system.