Instruction manual

SM425 INSTRUCTION MANUAL 11.0 INSPECTION and MAINTENANCE
Optional inconel bolts have a high coefficient of expansion. If excess torque is applied while the bolts are
being tightened, abnormal strain or breakage may result. Tighten the bolts following the instructions given
above.
11.1.3 Replacement of the Heater Unit
This section describes the replacement procedure for the heater unit.
The sensor and ceramic heater-furnace core are subject to fracturing. DO NOT subject them to strong
mechanical vibrations or mechanical shock. The heater unit reaches high temperatures and contains high
voltages. Remove power and allow heater unit temperature to cool to room temperature before
performing any maintenance.
For details, refer to IM11M12A01-21E "Heater Assembly".
If the heater strut assembly can not be removed because a screw has seized, contact one of our service
representatives.
178 42500001 REV A