Blodgett MT3255 Series - Page 64

CALIBRATION AND ADJUSTMENT
4 --- 8
the setting, counter-clockwise decreases it.
See FIGURE 8.
HIGH LIMIT ADJUSTMENT
NOTE: Refer to the wiring diagram located on the
oven or on page 3 ---21 of the Operation
section. For additional assistance call the
Blodgett Service department.
1. Remove the wires from the common and N.O.
terminals. Touch the wires together to energize
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 tem-
perature rises above 600_F (316_C), adjust
the hi-limit pot (FIGURE 8) so the burner shuts
off at 600_F (316_C). A clockwise rotation of
the high -limit pot increases t he temperature,
counter-clockwise decrea ses it.
INCREASEDECREASE
INCREASE
1 2 3 4 5 6 7 8
230 115 NC C NO NO C
DECREASE
LOW LIMIT
HI LIMIT
United Electric 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 8