background image

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

Summary of Contents for Mag25

Page 1: ...Mag25 Furnace Operation and Assembly Instructions ...

Page 2: ...ant women away during use and until cleanup is complete Risk can be reduced but not eliminated with strong ventilation washing hands immediately after use of these products before eating or smoking and careful cleaning of surfaces and floors with disposable wipes after lead dust has had a chance to settle Use a lead specific cleaner with EDTA or a high phosphate detergent like most detergents sold...

Page 3: ...tive harm and other severe physical injury must be handled with extreme care Handle lead bullets or lead shot only in well ventilated areas and ALWAYS wash hands after handling lead and before eating or smoking Discharging firearms in poorly ventilated areas cleaning firearms or handling ammunition also may result in exposure to lead Have adequate ventilation at all times Safety Precautions 1 No c...

Page 4: ...e of the warning shelf will help re duce the time needed for a mould to being producing good wrinkle free bul lets Mould Guide Alignment and Use The Mag 25 mould guide is designed to accept moulds made by Lyman RCBS Saeco and Lee There are two steps on the mould guide rails which will fit these various moulds Note It is recommended that the mould guide be adjusted when the furnace is cool and not ...

Page 5: ... the operator When all cavities are filled allow the mould to rest on the guide for several seconds until the sprue so lidifies OperatingYour Furnace Plug in your furnace to turn it on Unplugging it will turn it off Up to 25 pounds of cold bullet metal can be added to the pot Note before using your new furnace for the first time we suggest you turn it on when empty and set the furnace for the desi...

Page 6: ...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 wi...

Page 7: ...r at times if dirt or grit suspended in the molten lead gets caught in the shut off valve Fully opening the valve will usually clear such debris When this does not work drain the furnace and allow it to cool Then remove and clean the shutoff rod If the drain spout is seriously clogged heat the furnace to the melting temperature Hold an un bent paperclip with pliers and feed the wire up through the...

Page 8: ... 8 Lyman Visit our website to see our full line of products or request a free catalog 1 800 22 LYMAN www lymanproducts com 475 Smith Street Middletown CT 06457 Rev 07 14 ...

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