Service and Parts | 6-1
SERVICE AND PARTS
The operations in this appendix should be performed only by qualified
service personnel with a knowledge of electrical safety techniques.
Never service the sensor unless power has been removed from the sen-
sor, and the sensor has been allowed to cool for one hour.
This chapter is divided into the following sections:
• Cell Replacement
• Thermocouple Replacement
• Furnace Replacement
• Combustibles/Methane Detector Replacement (optional)
• Flow Sensor Replacement
• Box Heater Wiring
• RCU (Remote Calibration Unit) Solenoid Valve Replacement
• Electronics Board
• Recommended Maintenance Schedule
• Replacement Parts List
You can clean the outside of the sensor using normal household or com-
mercial general purpose cleaners, cloths, or sponges. You can also use
water. Always turn off power before attempting to clean the enclosure.
A wiring diagram for a standard sensor is provided in Figure 8-1. This
figure shows the locations of all wiring connections on the sensor. If your
sensor requires different wiring, this is provided in an appendix.