Installing The Circuit Board Assembly - GE DigitalFlo XGM868i Service Manual

Chapter 4. Parts Replacement

4.7.2 Installing the Circuit Board Assembly

Be sure that the circuit board assembly is completely assembled, as described in the previous section. Then, refer to
Illustrations 1, 2 and 3 in Figure 6 on page 33 and install the circuit board assembly into the electronics enclosure as
follows:
1. Slide the terminal board end of the circuit board assembly into the front of the electronics enclosure. By aligning
the slots around the circumference of the terminal board with the bosses inside the enclosure, guide the circuit
board assembly into the enclosure until the terminal board just clears the bosses at the rear of the enclosure. (Refer
to Illustration 3.)
2. From the rear of the enclosure, rotate the circuit board assembly about 20° clockwise so that the mounting holes in
the terminal board are positioned over the tapped holes in the bosses. Secure the circuit board assembly to the
enclosure with four mounting screws, flat washers and lock washers previously removed. (Refer to Illustration 2.)
If the circuit board assembly is inserted too far into the enclosure, it cannot be rotated properly.
IMPORTANT:
3. Attach the loose end of the green grounding jumper wire to the enclosure with the mounting screw, flat washer and
lock washer previously removed. Be sure to install the metal label plate under this screw. (Refer to Illustration 2.)
4. From the rear of the enclosure, connect the power line leads to terminal block TB5. Plug the connectors back into
terminal blocks J1-J4. If necessary, see Chapter 1, Installation, of the Startup Guide for detailed wiring instruction.
5. Install the front and rear covers on the electronics enclosure and secure them in place with the set screws provided.
(Refer to Illustration 1.)
The Model XGM868i is now ready to be placed back into service. Before taking measurements with the Model
XGM868i, refer to Chapter 2, Initial Setup, of the Startup Guide and Chapter 1, Calibration, of this manual for
instructions on properly setting up the meter for accurate flow rate measurements.
Note: Be sure to enter a complete and detailed account of any parts replacement performed on the Model XGM868i
in Appendix A, Service Record.
To purchase the parts mentioned in this chapter or any items not specifically discussed, contact the factory for
assistance. To make sure the proper components are obtained, be sure to specify the serial number of the Model
XGM868i at the time of purchase.
32 DigitalFlow™ XGM868i Service Manual