When replenishing a near-empty pot, there is no need to adjust the control knob since the
furnace automatically increases its heating efforts until the designated pot temperature is
reached. The blinking pilot light indicates the furnace is at temperature.
The bottom pour spout valve system of the furnace has been designed to provide efficient
trouble-free casting. Valve leakage is usually caused by dirt and grit, suspended in the molten
metal, jamming the valve partially open.
Opening that valve to “full open” will usually clear such debris. When this does not work,
drain the furnace and allow it to cool. Then dismount and clean the shutoff rod valve and
internal bottom pour spout drain.
If the drain channel is seriously clogged, heat the furnace to the melting temperature. Hold
an unbent paperclip with pliers and feed the wire up through the drain channel to dislodge any
obstruction. Be careful to wear heat resistant leather gloves when performing the above pro-
cedure.
How to Use the Warming Shelf
The warming shelf is located on the rear rim of the inner pot and allows you to pre-heat
your mould blocks while the furnace is bringing your bullet metal up to casting temperature.
Single and double cavity moulds are best stood on end with the handles straight up. Four
cavity blocks are best positioned horizontally on the warming shelf.
Use of the warming shelf and the foregoing placement techniques will greatly reduce the
block warmup time to produce a good bullet - and keep the handles cool, too.
The Thermostat
Your new Lyman electric furnace provides a full range of temperature adjustments. The
thermostat employed is one of the finest available and allows you to control the melt tempera-
ture to within 20 degrees repeatability.
In time, your original thermostat and/or heating coil will age to the point where it needs
replacement. In the interest of safety, replacement thermostats and heating coils must be
installed in our factory. A minimum charge (plus shipping) is made for this service.
Remove all bullet metal before shipping your furnace to the factory for service.
Preserving your Furnace’s Heating System
To realize the longest possible life from your furnace, follow these precautions:
I . Disconnect your furnace when it is not in use.
2. Do not operate your furnace above rated voltage (115 Volts, AC or 240 Volts, AC).
3. For maximum life, run the furnace at the lowest temperature that provides satisfactory
casting. Establish appropriate temperatures by trial for each type of bullet metal. Normally
a 650˚-720˚ F temperature range proves adequate for most bullet casting.
Lyman Mould Guide - Alignment and Use
The proven and popular Lyman Mould Guide is an assembled part of your new electric furnace. Please
read the following for details on how to adjust the mould guide for optimum performance for your applica-
tion.
Place your bullet mould in the track of the mould guide and raise the entire mould guide assembly until
Mag 20 (continued)
