Owner`s manual

Manual Control Startup
6
Temperature Calibration
Low Limit Adjustment
1. Bring the oven to 200_F(93_C).
2. Turn the blower and heat switches to OFF. The
blow er should continue to run.
3. Monitor the digital temperature control dis -
play. The blower motors should shut off within
the range of 170-135_F(77-57_C).
4. To adjust the temperature, turn the low -limit
potentiometer. A clockw ise rotation increases
the setting, counter-clockwise decreases it.
SeeFigure4.
High Limit Adjustment
NOTE: Refer to the wiring diagram shipped with
the oven for terminal locations.
1. Remove the w ires from the common and N.O.
terminals. Touch the wires t ogether to ener-
gize the heat circuit. This enables the oven to
heat above the highest temperature allowed
by the controller.
2. When the display reads 600_F (316_C), the
burner blower motor should shut off. If the
temperature rises above 600_F (316_C), ad-
just the hi-limit pot (Figure 4) so the burner
shuts off at 600_F (316_C). A clockwise rota-
tion of the high-limit pot increases the temper-
ature, counter-clockwise decreases it.
INCREASEDECREASE
INCREASE
1 2 3 4 5 6 7 8
230 115 NC C NO NO C
DECREASE
LOW LIMIT
HI LIMIT
United E lectric Board
Athena Temperature Controller
ZYTRON
SERIES 300
13 26 5
478
115
230
NO C NC
OUTPUT 1
NO C
OUTPUT 2
T1
P1
LOW LIMIT
P2
HI LIMIT
P3
910
+
T/C
RED
INCREASE
DECREASE
DECREASE
INCREASE
Zytron Board
ACTUAL SETPOINT HEAT
Figure 4