Operation, All Models; Power Switch; Cycle Light; Door Safety Switch - Barnstead 47900 Operation Manual

Operation, All Models

Warning
To avoid personal injury do not use in the
presence of flammable or combustible
chemicals; fire or explosion may result.
This device contains components which
may ignite such materials.
Hot Surface
Caution: Avoid Contact. To avoid burns,
this furnace must not be touched on the
exterior or interior surfaces during use or
for a period of time after use.
Warning
Always wear safety glasses or a safety
shield and high temperature gloves when
loading or unloading the furnace. Long
sleeved, fire retardant clothing and a fire
retardant apron is also recommended.
Warning
To avoid electrical shock, the door safety
switch must be operating properly.
10

Power Switch

Both the ON/OFF power switch and the digital
display will illuminate when power is switched
ON. The furnace will begin to heat to its con-
troller's current setpoint. (See the instructions
for your type of controller for information on
checking and setting the setpoint.)

Cycle Light

The amber cycle light will illuminate whenever
the power is being applied to the heating ele-
ments. The cycle light will turn on and off as
the furnace reaches the setpoint.

Door Safety Switch

The door safety switch removes power from
the heating elements when the door is
opened. Open and close the door a few
times; note that the amber CYCLE light will
switch off when the door is opened. If this
condition is not true, consult the
Troubleshooting section before proceeding.
This check must be done when the furnace is
heating and the cycle light is illuminated.