The upper display marked “PV” (process value) is the actual temperature of
the metal (+ or – approximately 10 degrees F. Please note that this temper-
ature tolerance is for a typical volume of lead. If filled right to the top or
drained close to empty, the temperature tolerance can be a little greater.)
The furnace is factory set for a maximum temperature of 850 degrees F.
While the controller is capable of multiple functions, the caster will only
need to be concerned with basic temperature changes and other functions
are locked. To change the temperature setting, tap the Up or Down button.
(See Figure 3 for identification of keys.) The set temperature in the “SV” dis-
play will flash. Move the temperature up or down with the appropriate but-
ton. The temperature will change in 10 degree increments. Once the
desired temperature is selected, wait a few seconds and the display will
stop flashing, showing that the temperature has been changed.
From this point on the furnace will automatically cycle on and off to main-
tain the set temperature. When heating or attempting to keep the tempera-
ture within its tolerance range, the “OUT” (output) light will be on. It will blink
as the actaul temperature reaches the set temperature. If the light is off, the
furnace is not heating. If the actual temperature raises approximately 20°
above the the set temperature, the heater will cycle off automatically, drop-
ping the temperature back down to the set level. When the controller is not
attempting to adjust the temperature, no indicator lights will be on.
If the unit temperature reaches or exceeds 950°, the PV reading will
show “Err” and the AL light will come on. If this happens, unplug the
unit and contact Lyman Customer Service.
You may see some movement up or down in the actual temperature read-
ing as the heat is cycled on and off. You may need to experiment with differ-
ent temperature settings to find what works best with a particular mould.
- 6 -
Process Value:
Actual temperature
of lead
Set Value:
Temperature
that the furnace
is set for.
These buttons
are not used
Down Reduces
Temperature
Up Increases
Temperature
Figure 3
