Page 5-6
Revised 1/05
ITW Dynatec c. 2004
DYNAMINI ASU Manual #20-25
Service Functions,
cont.
To Set Tolerance (Hi & Low Temperature Limits)
Press the Service icon twice to select the Tolerances of your
temperature zones. An display of “t--1” indicates the Tolerance
function has been selected.
Press the Tank button to display the Tolerance.
Use the scroll buttons to change the Tolerance range for all zones.
Note: your Tolerance range must be a value between
±
50 degrees
for Fahrenheit (
±
27 degrees for Celsius).
When Tolerance programming is complete, wait a few seconds and
the controller will return to the ASU’s actual temperature.
The Tolerance (high/ low alarm) setpoint is a range (+ and -- the zone’s temperature setpoint) be-
tween which your ASU can safely operate. It’s lower temperature represents the ASU’s ready
temperature. It’s upper value represents the over-temperature point.
Setting the Tolerance range, for example: if the temperature setpoint is 200 degrees, and the Toler-
ance setpoint is 10 degrees, then the high alarm (overtemp) equals 210 degrees and the low alarm
(ready temp) equals 190 degrees.
x 2
or
Turning Sequential Startup ON/OFF
The Sequential Startup feature programs the order in which the temperature zones will come on at
startup. A Sequential Startup” of “SS1” (On) means the tank will begin heating first, then, when the
tank is ready, the other zones will begin heating. A Sequential Startup of “SSO” means Sequential
Startup is Off and all zones will begin heating immediately.
or
Press the Service icon three times to set Sequential Startup.
The display will flash either “SS1” (sequential startup is ON) or
“SS0” (sequential startup is OFF).
Scroll to choose between ON and OFF. When programming is
complete, wait a few seconds and the controller will return to
the ASU’s actual temperature.
Note: Any time the ASU is switched ON, you will briefly see
“SS1” or “SS0” displayed.
x 3
or
