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high temp furnace current controller

We have an 832/40A240V/00/4-20ma-pa/@AF120/ controller with serial A21906-001-006-92-03 part #CNX125.
What is the value of resistor R53 next to Q4 on the daughter board? Thanks Rich Laughlin senior tech instructor 330-941-7204 rllaughlin@ysu.edu
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