Airbath Heater Assembly Replacement; Airless Heater Replacement - Siemens Maxum II PD PA AP Service Manual

Oven Types

1.6 Airless Heater Replacement

1.5

Airbath Heater Assembly Replacement

1. Verify work area is safe
2. Disconnect power from analyzer
3. Turn off air supply to analyzer
4. Unplug probe from converter cable at PECM
5. Remove center or left of center Mezzanine Cover
6. Unplug heater power plug in Mezzanine Electronics area
7. Disconnect air inlet and air outlet
8. Remove mounting screws and remove heater assembly
9. Replace in reverse order.
1.6 Airless Heater Replacement
1. Verify work area is safe
2. Disconnect power from analyzer
3. Remove left side mezzanine cover and the center mezzanine cover.
4. Unplug heater power connector in Mezzanine Electronics area
5. Disconnect wires to heater on the connector pins 1 and 2
6. Remove the wires from the wire sleeve.
7. Loosen the 7mm nuts on the mounting plate in mezzanine electronics area to allow the
heater to move.
8. Remove mounting plug with a 4mm hex key.
9. Remove heater by sliding it out the front of the analyzer. A M6 bolt may be screwed in the
bottom end of the heater and used to wiggle the heater back and forth and pull it out.
10.Replace in reverse order.
11.Slipping a plastic tube in the heater shaft makes it easier to slide the heater wires up the
shaft.
12.The plug must be screwed in 5 threads and apply a non-hardening, corrosion proof anti
seize containing no evaporates to the heater plug before installing it into the heater housing.
(Loctite, silver grade anti-seize 76732)
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Maxum II Valves and Oven Components
Service Manual, 10/2018, A5E42019844001