Knight UniTech Warewash, Instruction Manual

Page: 8 / 24

Page 8 of 24 0900591 Rev: A (07/04)
OPERATION
Detergent — Probe Mode
With the detergent signal “on”, the conductivity probe
senses detergent concentration. When concentration
drops below the setpoint, the control automatically turns
on detergent feed. As the detergent feeds, the control
senses the rate at which the detergent concentration is
approaching the setpoint. The control then begins to
pulse feeds to prevent over-use of chemical. The pulse
feed rate will depend on how fast the setpoint is being
approached.
The detergent alarm will sound if the setpoint is not
reached within the alarm delay time period. The alarm
can be temporarily silenced. A “feed limit” feature allows
you to set the unit to automatically shut off the detergent
feed when the alarm has been activated.
Detergent — Probeless Mode
Controls detergent concentration without a probe, based
on timed detergent feed modes. Initial charge time feeds
detergent to bring the dishmachine to working
concentration when initially filled with water. The initial
charge can be activated by a detergent signal, or by the
rinse signal (of 30 seconds duration, or longer) when
using door mode. The initial charge counter will
increment for each activation.
Recharge time feeds detergent to maintain detergent
concentration as rinse water dilutes the dishmachine.
The recharge is triggered after a specified number of
racks passes through the machine.
Rinse Pump
The rinse pump will operate whenever the rinse signal is
energized. The rinse delay feature will postpone the
activation of the rinse pump until the delay time has
expired. The rinse limit shuts down the rinse pump after
the signal has been present for a selected time. Rinse
delay and rinse limit are functional with door machines
only.
Sanitizer Pump
A menu selection sets the sanitizer pump to operate
with detergent feed, or with rinse feed. The sanitizer
pump will run simultaneously with detergent or rinse,
whether using probe or probeless mode, rinse delay or
rinse limit.
BUTTON FUNCTIONS
•
ENTER: Holding the enter button for 3 seconds
(approx.) switches between run and program modes.
Enter also advances through programming menus.
•
SCROLL: The scroll button moves the position of the
cursor in menus where text or number changes are
done. The scroll button will “wrap around” at the end
of a line of characters, meaning that the cursor will
advance to the beginning of the line automatically.
The scroll button toggles between choices in menus
that have selectable settings. The scroll button also
shows the rack count and initial charge count during
normal operation.
•
UP ( ): Increases numeric values or advances
upward through available characters. Hold the button
down to rapidly advance. The UP button also acts as
rinse prime during normal operation.
•
DOWN ( ): Decreases numeric values or advances
downward through available characters. Hold the
button down to rapidly advance. The DOWN button
also acts as sanitizer prime during normal operation.
De-lime Mode
During normal operation, hold the SCROLL and DOWN
buttons simultaneously for 1 full second. When “De-
Lime Mode“ appears on the display, all chemical feed of
the UniTech will be halted. Press the SCROLL and
DOWN buttons again, or cycle main power to the unit, to
exit the de-lime mode. Otherwise, the unit will
automatically exit de-lime mode after 10 minutes.
Alarm Mute
During normal operation, the low detergent alarm
(probe mode) can be silenced by pressing the SCROLL
and UP buttons simultaneously for 1 full second. The
display will show “Alarm Muted” and the audio alarm will
turn off for 5 minutes.