Specifications

Adjusting Furnace Set point
Temperature
• To illuminate the “DOWN” button, “SCROLL”
button, and “UP” button, touch anywhere on the
front panel.
• Push the “UP” button or the “DOWN” button to
modify the temperature set point (lower digital
display).
Tuning
This control incorporates a self tuning feature which de-
termines the optimum control parameters for the best
temperature accuracy. We recommend that you tune the
furnace to your specific application to obtain the best re-
sults. Perform the following procedures when you first set
up your furnace and each time you change your load type
or operating temperature.
To tune your furnace:
1. Load your furnace with a load characteristic of
those you intend to heat in it.
2. Set the furnace’s set point to the temperature
you intend to use for your application.
3. Push the “SCROLL” button until ‘tunE” appears.
To start the tuning function, push the “UP” but-
ton.
When the tuning process is started, the lower display will
flash ‘tunE” along with the furnace temperature set point.
During tuning, the temperature set point cannot be
changed. To change temperature set point ‘tunE” must be
turned “OFF.” (To stop the tuning function, push the
“DOWN” button.)
16
AUTOMATIC MODELS
Caution
Do not exceed limitations for continu-
ous or intermittent operating tempera-
ture shown in the General
Specifications section. Exceeding
these limits will result in severely
reduced heating element life.
Note
If the power to the furnace is turned off
or interrupted while in tuning, upon
returning power to the furnace, the
controller display will indicate, “LinE
FAIL” because sampled data could be
questionnable.
If the controller cannot maintain tem-
perature set point, “tunE FAIL” will
appear on display.First, correct the
problem responsible for not maintain-
inig the temperature set point, then
restart the tuning procedure.