Operation - Antunes, AJ TBS-1X Owner's Manual

8. With the unit positioned at the edge of its location
surface (Edge of the counter, table, etc.) slide the
steamer forward approximately 3" to expose the
Water Volume Control on the button of the unit
(Figure 7).
9. Using a small screwdriver (Figure 7), carefully and
slowly adjust the control clockwise to increase or
counterclockwise to decrease the amount of water
volume used per cycle.
10. Repeat steps 7 through 9 until the proper amount
of water level in the club is achieved.
Technical Theory of Operation
When the Rocker Switch (power On/Off)is ON, line volt-
age flows to the primary side of the step down trans-
former. The transformer's secondary side supplies 12
and 24 VAC to the Control Board. Once powered and
provided that the Generator's temperature is below 380
F (193 C), the Control Board calls for heat by supplying
7-10 VCD to Solid State Relay terminals 3 (+) 4 (-).
Once powered, the relay closes terminals 1 and 2,
which allows line voltage to flow to the Generator. As
the Generator heats up, a type "J" Thermocouple moni-
tors the internal Generator temperature. As the heat
continues to increase, so does the Thermocouple's DC
milivolts. Once the Generator temperature pproaches
380-420 F (193-215 C), the Thermocouple is generating
approximately 12 - 12 DC millivolts.
The Control Board receives these millivolts and then
removes the 7-10 VDC to the Solid State Relay, since
the heating circuit has now become satisfied. Then,
terminals 1 and 2 of the Solid State Relay open and the
Generator stops heating.
The heating circuit will cycle on and off as needed,
even at idle. When the cycle start (momentary) but-
ton is pressed, it signals the Control Board to initiate a
steam cycle. The Control Board then supplies 24 VAC
to the Solenoid Valve for a split second. The Solenoid
valve opens, and allows approximately 3/4 - 1 ounce
(4-5 tablespoons) of water to be disbursed onto the
Generator Surface for steaming.
Since the Generator has an oval cover that is secured
in place with a wing nut, the steam is forced downward
throught the Generator steam ports and onto the
product.
The Control Board incorporates several LEDs for
status and diagnostic purposes. See "LED Layout" in
P/N 1010698 Rev. E 03/04
TACO BELL STEAMER TBS-2X & TBS-1X
INSTALLATION (continued)
NOTE: If steamer does not steam properly after cali-
bration, refer to the Troubleshooting section of this
manual.
NOTE: If the Calibration Kit is missing, use the
Calibration Chart (Figure 8) to figure the approxi-
mate volume. Turn the water volume control to
0. Determine your water pressure and locate it on
the chart (left side), then look to the right to find
the volume closest to 0.8 oz. (25 ml or 25 cc). Turn
adjustment clockwise to setting shown at top of
chart.

OPERATION

the Operation section of this manual.
An audio signal will sound for 3 seconds at the end of
a steaming cycle. If the heating circuit continues to call
for heat and the Generator overheats, an automatic
reset Hi-Limit will trip and open both the Generator and
Transformer circuits. The Hi-Limit will reset automati-
cally once the Generator cools down.
NOTE: If this condition should repeat, the root
cause must be determined and corrected.
LED Layout
This section describes the four LEDs used by the sys-
tem for status and diagnostic purposes.
•
•
NOTE: This LED is only lit for a split second.
•
•
NOTE: This LED should NOT be lit during normal
operation.
9
CR6 RED (Heat): When lit, this LED indicates that
the Control Board is calling for heat by supplying 7-
10 VDC to the Solid State Relay.
When off, this LED indicates that the Generator is
up to operating temperature.
CR7 GREEN (Solenoid Valve): When lit, this LED
indicates that the Control Board is supplying 24
VAC to the Solenoid Valve.
CR8 YELLOW (Audio): When lit, this LED indi-
cates that the Control Board is supplying 10 VDC
to the audio signal. The audio signal and LED will
activate for 3 seconds at the completion of a steam
cycle.
CR10 YELLOW (Thermocouple): When lit, this
LED indicates that the Thermocouple is discon-
nected or "open" and the Control Board will not call
for heat.