Service manual

ELECTRIC CONVEYOR OVENS - SERVICE PROCEDURES AND ADJUSTMENTS
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e 12 of 24
SERVICE PROCEDURES AND ADJUSTMENTS
WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR
MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT
ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POWER, ATTACH TEST
EQUIPMENT AND REAPPLY POWER TO TEST.
BLOWER ADJUSTMENT
WARNING: UNPLUG UNIT BEFORE SERVICING.
1. Remove the blower motor and mountin
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assembly by followin
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steps 1 thru 4 as
outlined under "BLOWER MOTOR" in
“REMOVAL AND REPLACEMENT OF
PARTS”.
2. Loosen the motor mountin
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bolts.
3. Adjust the motor position until the blower is
parallel to the motor mountin
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plate.
CAUTION: Ensure that the blower does not hit
the heat exchanger.
4. Ti
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hten motor mountin
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bolts.
NOTE: If the top and bottom of the blower are not
parallel to the motor mountin
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plate, shims should
be placed between the motor and the mountin
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plate.
5. Reverse the procedure to install.
TEMPERATURE CONTROL
PROGRAMMING AND
CALIBRATION
Programming
NOTE: Durin
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pro
g
rammin
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, after 15 seconds of no
activity, the controller will automatically save the
settin
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s and return to the temperature display.
1. Turn the power switch off.
2. Press and hold down “S” key on the control.
3. Turn the power switch on. “PrG” will appear on
the display.
4. Release the “S” key and “PO” will appear on
the display.
5. Press either arrow key until “P85" appears on
the display.
NOTE: P85 must be displayed. It is the only entry
applicable to these units.
6. Press “S”.
7. Press either arrow key until the display shows
“H”. This sets unit to use a “K” type
thermocouple and must be used.
NOTE: “J” in the display sets unit for use with a “J”
type thermocouple. Do not use this settin
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.
8. Press “S”.
9. Press either arrow key until the display shows
“oF” for °F read-out or “oC” for °C read-out.
10. Press “S”.
11. Press either arrow key until the display shows
“nD”. This sets unit for normally de-ener
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ized
output relay and must be used.
NOTE: If “nE” is selected it sets unit for normally
ener
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ized output relay and oven will not operate.
12. Press “S”.
13. Press either arrow key until the display shows
“FO”. This sets unit for thermostat on and must
be used.
14. Press “S”.
15. Press either arrow key until the display shows
“HE”. This sets unit for heatin
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mode and must
be used.
16. Press “S”.
17. Press either arrow key until the display shows
“H5”. This set unit for thermostat cycle time
delay and must be used.
18. Press “S” repeatedly to until the normal
temperature display is shown.
Calibration
NOTE: Durin
g
pro
g
rammin
g
, after 15 seconds of no
activity, the controller will automatically save the
settin
g
s and return to the temperature display.
This procedure sets the temperature control to
a
g
ree with actual cavity temperature.
1. Position temperature tester probe in center of
oven cavity.
2. Turn oven on.
3. Set oven temperature control to 500 F set
point temperature.