Specifications

Section 1
1-8 LA-306 Operation & Theory
1.4.2 POWER Panel
A. MAIN POWER lamp
When this WHITE light is ON, the furnace is connected
to the power line.
B. CONTROLS pushbuttons with indicator
Pressing the green switch applies power to the furnace
controls, belt motor and cooling fans.
Pressing the red switch shuts off power to the furnace
and acts electrically in the same way as pushing an
EMO button.
Between the switches is an indicator light that stays ON while the control system is ON.
C. LAMPS pushbuttons with indicator
These buttons work only when CONTROLS indicator is ON.
Pressing the green switch applies power to the lamps and SCRs.
Pressing the red switch shuts off power to the lamps and SCRs.
Between the switches is an indicator light that stays ON while the lamps and SCRs are ON.
D. COOL DOWN pushbutton with lamp
Pressing this switch begins a timed, power shut down sequence. The furnace lamps and SCRs shut down
immediately.
If the operator also presses the red CONTROLS switch, the control system shuts off, but the COOL DOWN
circuits keep the zone controllers, transport belt, and cooling fans ON to help cool the furnace until the timer
expires.
While in COOL DOWN, the blue indicator in the pushbutton is lighted until time expires.
E. COOL TIME knob
This knob sets the cool down time over a range from 1.2 minutes (fully CCW) to 120 minutes (fully CW). Set
enough cool down time so that each zone process temperature (red PV) falls below 100°C. When the timer
expires, all displays, the belt and fans shutoff automatically..
1.4.3 ENERGIZE LAMPS Panel
A. Zone Switches with Lamps
These zone selection switches turn top and bottom
heating elements in each zone ON or OFF. When a
switch is turned CW, those elements are selected to be
ON, and the switch light will turn ON. Turning a lighted
switch CCW will turn those elements OFF.
Selected zones will remain selected even when furnace
power is OFF.
Note: Change zone selection only with LAMPS OFF to maximize zone selection switch life.
Figure 1-13 Power Panel Controls
Figure 1-14 Energize Lamps Controls