Service manual

06/2010
2. Place the fitting and the ferrule on the thermister as shown in figure -7.
3. Insert the end of the thermister without electrical leads into the heat exchanger until the heat
shrink (black) on the thermister touches the fitting and tighten the fitting finger-tight. Wiggle to
locate center. The final tightening should be done using two wrenches as described in step 1.
4. Check the resistance across the thermister leads. Under room temperature conditions the value
should be between 700 - 1100 ohms. A further check can be done by comparing this resistance
to the other two thermisters. If all thermisters have been exposed to the same temperature they
should be within 50 ohms.
5. Wire tie the harness together with the other two thermister harnesses and connect into the
thermister harness that goes back to the control board.
6. You must run AutoCal to complete the installation. Refer to SM500-15.
7. Perform a test of the unit. Refer to SM500-16 ‘Testing the RV500’.
Kit Parts List:
2008 T-mid thermister assembly
Figures:
Figure-7 T-mid Ferrule Assembly
Model: RV500-F-L / RV501-F-L
SM500-09 T-out Thermister Change Procedure
Other service documents required:
SM500-16 Testing the RV500
Tools Required:
Scissors (or other cutting tool)
1. Remove the wire ties, metal tape, and old thermister. Clean off the old heat sink and be sure
copper is wiped clean.
2. Place a large dab of heat sink compound on the pipe to replace the compound removed.
3. Place the thermister into the heat sink compound with the wire leads pointing down along the
tube. Make sure the tip of the thermister is completely submerged in the compound.
4. Wrap metal tape around the tube and thermister.