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7
The MultiFlex RTU
Hand-Held Interface
The MultiFlex RTU Hand-Held Terminal
interface allows you to view status of the rooftop
HVAC systems and configure setpoints directly
on the board. If you are using RTUs separate
from a central Einstein or BCU system, the
Hand-Held Terminal will be the only
programming interface you may use.
IMPORTANT! If the RTU boards are
connected to a parent Einstein or BCU, do not
use the Hand-Held Terminal to make
permanent configuration changes. Changes
made to an RTU via the Hand-Held Terminal are
designed to be temporary for units connected to
an Einstein or BCU. The parent controller does
not recognize any configuration changes made
by the HHT, and when the HHT is unplugged
from the RTU, Einstein will change all
parameters changed with the HHT back to their
original values.
7.1. RTU Hand-Held Terminal
Status Screens
When an HHT is plugged into an RTU, users
may access a series of screens that display input
and output status information. Certain control
parameters, such as offsets, setpoints, and
deadbands, may also be changed in these
screens. The HHT may also be used to initiate
cooling, heating, fan, auxiliary, and economizer
overrides.
The UP and DOWN keys on the HHT keypad
are used to scroll through the screens. The
DOWN key scrolls forward through the screens,
and the UP key scrolls backward.
Some screens will have fields that may be
changed using the HHT. To change the value in a
field, press the RIGHT arrow key. A cursor will
appear in the screen next to the first
changeable field in the display. Use the UP and
RTU Hand-Held Terminal Status Screens
DOWN arrow keys to move the cursor to the
desired field, and enter the desired value using
the numeric keypad or select an option using the
dash "—" key. When finished, use the UP and
DOWN arrow keys to move the cursor off the
screen.
At any screen, the F1 key may be used to call up
a brief description of the screen's function. To
exit the help screen, press any key on the
keypad. The following sections show the HHT
screens for all RTU types currently available.
The MultiFlex RTU Hand-Held Interface • 23
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