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CONVEYOR OVEN SERVICE MANUAL
Electrical Compartment Thermostat
The electrical compartment thermostat is a normally
open snap disk type switch that is mounted behind the
back electrical panel. The switch closes at 180˚ F. (82˚
C). When the oven’s On/Off switch is in the On position,
both the blower motor and cooling fan will engage.
When the power switch is placed in the Off position,
the fan operation will continue until the compartment
temperature drops below the 180˚ F. (82˚ C) set point.
Blower Motor
The blower motor is proprietary and designed for this
particular application. Removal of the blower motor can
be performed from the rear without requiring fan wheel
removal. Care must be taken to ensure that the fan is
not damaged during removal and replacement.
Heater Element
The heating elements are located behind the catalyst
(when applicable) and in front of the fan wheel. The
ICO-1848 has one 6500-watt heater assembly. The
three elements in the assembly are fixed to a mounting
plate. The assembly is mounted on the right side of the
cook cavity. The elements are voltage specific to 208 or
240V but can be used for both single and three phase
applications. The heater element operation is controlled
by a contactor with the coil inputs from the temperature
controller.
High Temperature Limit Switch
The oven has an over temperature safety switch
located on the right side back of the unit. The switch
will interrupt all power to the conveyor oven if the
temperature in the cavity rises above 572˚ F (300˚ C).
After the oven cavity cools, the fault can be removed by
pressing the red button on the back of the unit.
Jetplates/ Air Returns, Top And Bottom
The impingement air is being pushed through the top
and bottom jet plates by the blower motor. The jet plates
and air returns are different and must be correctly
positioned for proper cooking performance. Improperly
installed jet plates and air returns will change the cooking
characteristics resulting in substandard cooking quality.
Each jet plate and air return is marked with a series of
holes that corresponds to the same indicator on the
front of the unit. In addition, there is a positioning post
inside the unit that corresponds to a notch on the back
of the jet plate/ air return. Improperly positioned jet
plates and air returns will not insert completely and will
not allow the door to latch.
Fuses
The oven uses a total of 3 fuses in the electrical system.
The two main fuses are located in the fuse block located
on the back panel. They are accessed by removing
the panel screw. The cover is held in place by a strong
magnet located inside the cabinet. It will take extra effort
to open the cover. Once disengaged from the magnet,
the cover rotates open from the bottom and is held in
place (it cannot be removed from the unit). These are
Class CC KLKR 3 amp fuses.
The other fuse is in the panel mount holder at the
bottom back of the unit. This fuse protects the conveyor
motor. It is a Class 3AG 3 amp fuse.
OVEN SYSTEMS
Due to the design of the electrical circuit, the unit
is never truly in an “Off Mode”. When the power
switch is set to “standby” , electricity is still
present in the control panel. Always disconnect
the power from the wall before opening the
control panel
WARNING
To allow the cooling circuit to perform properly,
when the unit is powered down, 15 minutes
should be allowed to pass before the unit is
unplugged. The temperature in the unit will
continue to rise after the elements go off. In some
cases, this rise may be sufficient to engage the
cooling circuit several minutes after the unit is
placed in standby.
NOTICE
