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Note: 240-volt ovens may be operated on 208-volts. Heat-up will be slightly slower.
GROUND YOUR OVEN
Our 120-volt ovens are fitted with a power cord having a plug with grounding blade. Be sure the plug is used
with a matching receptacle and that the grounding blade is used. DO NOT cut off the grounding blade or
plug into a non-grounded receptacle. This would leave the oven's cabinet ungrounded in violation of
electrical codes and common sense.
If you have any doubts about receptacle grounding, have an electrician test the receptacle; making sure it is
correctly wired.
Some 240-volt ovens are set up to be hard wired. Have these models connected by a qualified person; and
make sure the oven grounding wire is connected to the equipment-grounding conductor in the branch circuit
feeding the oven.
4.0 INSTALL YOUR OVEN CAREFULLY
Location: Place your oven close to your power receptacle. Try to locate it away from drafts, air conditioners
and hot air ducts. Rapid changes in ambient temperature make it more difficult for the controller to hold
temperature at an exact level. This is true even though the controller is highly responsive.
Keep it Level: The oven has heavy-duty adjustable leveling legs. After you locate the chamber, use the legs
to level it.
Keep it Clean: The oven was thoroughly cleaned at the factory. But you might want to clean it again before
putting it to work. Then, from time to time, clean it when its walls or shelves get stained. Remove the
shelves. Clean them. Clean the entire interior, with particular attention to the corners.
5.0 KNOW THE CONTROLS
Power Switch: Turns the oven ON or OFF.
Overtemperature Safety: has a rotating knob allowing you to select the over temperature set point. To
operate, simply, turn the dial to the approximate desired temperature. Note: Scale is in °C and is ± 10°C.
RCOMMENDED OPERATION
: Set the main oven temperature controller (per the instructions below) to your
desired oven set point. Allow the oven to stabilize at that set point. Turn the OTP knob to the left until the
safety light comes on. Back OTP knob off three to five degrees after the safety light goes off.
Temperature Controller: is a Watlow 981 programmable controller. Please refer to the controller manual
supplied with your oven for programming and more detailed information regarding your controller. For
simple set point information, turn to Paragraph 6.0. Before you operate the oven it would be a good idea to
turn to page 3.1 of the Watlow manual for a description of the key functions.
Vacuum Ovens: In addition to the controls listed above your vacuum oven has two additional controls.
Vacuum Inlet Valve: SMALL KNOB located to the left of the vacuum gauge. This knob allows is for venting
of the oven or use with an inert gas backfill. The connection for this valve is at the back of the oven and is
the smaller ¼” tube.
Vacuum Pump/Suction Valve: LARGE KNOB located just below the smaller vacuum inlet valve. This
knob opens the suction line that should be connected to the 3/8” tube located at the rear of the vacuum
oven. Disregard this connection if you intend to use the 1” vacuum/accessory port located in the center of
the back of the oven for your main vacuum connection.