SERVICE AND REPLACEMENT GUIDE OP–2FM OWNER'S MANUAL
NU–VU® FOOD SERVICE SYSTEMS PO BOX 35 MENOMINEE, MICHIGAN 49858-0035
page 26 SALES FAX (906) 863-5889 • SERVICE FAX (906) 863-6322 (800) 338-9886
POWER TERMINAL BLOCK OR CONTACTOR, How To Replace:
The Power Terminal Block [1] or Contactor [3] very seldom requires replacement. However, should
either one ever become damaged or defective in any way a qualified electrician or service technician
should be called in and the NU-VU
®
Service Department notified immediately!
OVEN MOTOR ASSEMBLY, How To Replace:
MAKE SURE ALL POWER TO THE UNIT IS OFF. FAILURE TO DO SO MAY CAUSE
SEVERE EQUIPMENT DAMAGE OR PERSONAL INJURY!
A. Remove the Oven Element Cover [52] by
removing the two thumbscrews from each
side. Pull the Element Cover down and to the
front of the Oven to remove it.
B. Measure and record the distance from the
ceiling of the Oven to the bottom of the
Blower Wheel [51]. Loosen the two set
screws on the hub of the Wheel with a 5/32"
allen wrench and pull the Wheel from the
Motor shaft.
C. Remove the Outside Top [71] of the unit.
Label and disconnect all wires attached to the
Oven Motor [7]. Loosen and remove the four
nuts from the Motor Mount and lift the Motor
out.
D. Position the replacement Motor over the
mounting bolts. Start the nuts on the mounting bolts but do not tighten them. Make sure the
Motor shaft is centered in the passage hole in the Oven ceiling and that the Motor shaft turns
freely. Now tighten the mounting nuts securely.
E. Reconnect the Motor wires. Make sure all connections are clean and tight. Leave the Motor
Cover off.
F. Install the Blower Wheel on the Motor shaft. Set it at the same distance as was measured
before the Blower Wheel was removed. Position the two set screws over the flats on the Motor
shaft and tighten them down until snug. Recheck the position of the set screws over the shaft
flats and the measurement from the ceiling of the Oven. Torque both set screws to 175
inch/pounds.
IMPORTANT: A loose Blower Wheel will cause an immediate service problem and may
damage the Oven Motor!
G. Restore electrical power to the unit and test the Oven Motor for proper operation. Watch the
Oven Motor for any vibration. Any vibration or wobble in the Blower Wheel or Oven Motor
must be corrected immediately (refer to BLOWER WHEEL INSTALLATION AND
BALANCING).
H. Replace the Motor Cover and the Oven Element Cover. Make sure the ½" flange on the back of
the Element Cover fits into the guide strip welded to the ceiling of the Oven and that the Element
Cover is all the way back and tight to the ceiling. Tighten the thumbscrews securely.
IMPORTANT: IMPROPER INSTALLATION, MISUSE OR OTHER FAILURE TO
FOLLOW THESE INSTRUCTIONS MAY CAUSE SEVERE EQUIPMENT DAMAGE
OR PERSONAL INJURY, AND MAY ALSO VOID YOUR NU-VU
®
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