Specifications

Exhaust tubing hook-up.

NOTE

Appropriate exhaust must be provided to remove smoke and gases produced in an ashing

procedure.

Using accessory tubing available from Barnstead/Thermolyne Corporation (part number

AY408X1A for furnace temperatures less than 975°C, part number AY718X1 for furnace

temperatures of 975°C or greater) or equal quality 2.5" I.D. tubing appropriate for the

temperatures at which you will operate your furnace, connect flexible tubing from vent port at top

of furnace case to an appropriate negative pressure exhaust system. This exhaust system must

be capable of handling smoke and gases produced in an ashing procedure.

NOTE

Failure to connect the exhaust port to an appropriate exhaust system will result in smoke and

gases filling the work area. Without the connection, gases and smoke will escape around the

door seal and at the rear of the furnace.

Furnace Loading

For best results, use only the center two-thirds of the furnace chamber.

CAUTION

Do not overload your furnace chamber. If the load is to be heated uniformly it should not

occupy more than two-thirds of the furnace chamber. Failure to observe this caution could

result in damage to furnace components.

Use Hearth plate to elevate load when placing on bottom heating element. This prevents bottom heating

element from overheating and burning out. (Part Numbers PHX1 &PHX2)

If you are heating a number of small parts, spread them throughout the center of the furnace chamber.

Keep objects away from thermocouple.

Use insulated tongs and mittens when loading and unloading furnace.

Always wear safety glasses.

Preventative Maintenance

This unit is equipped with a venting system on the top of the furnace. This is for the removal of fumes from

the chamber of the unit. Contamination is a major cause of element failure, therefore, remove all fume

forming material before heating. (e.g. clean cutting oil from tool steel).

Housekeeping is vital to your electric furnace - KEEP IT CLEAN. Run your furnace up to 1600°F empty

occasionally to burn off the contamination that may exist on the insulation and elements. Maintain 1600°F

for at least 4 hours to insure complete ashing of foreign materials.

Element life is reduced somewhat by repeated heating and cooling. If the furnace is to be used again

within a few hours, it is best to keep it at the operating temperature or at a reduced level such as 500°F

(260°C).