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PAGE 24
2472 DI HEATER OPERATION / MAINTENANCE MANUAL
Example:
“Power Distribution” LED E1 of Heater 1 fails to illuminate;
check these two fuses (“Main Breaker” off).
Figure 7-1
Lockout/Tagout power to the heater.
Remove electrical access panel and replace fuse with proper type.
NOTE:
Chronic replacement of the same fuse(s) indicates possible
heater element damage or fuse block contact damage (see Section 8,
Troubleshooting).
7.1.c Draining the System
Close heater DI water inlet isolation valve.
Connect fluid inlet to an open drain line.
Loosen a fitting in the upper manifold to release internal vacuum in
the line.
The system will drain through the cold DI inlet; a small amount of
water will drain through fluid exit port.
Perform required maintenance.
Reconnect fluid inlet and outlet to process lines and refill the system.
7.1.d Leaks
When a leak has been detected it is recommended that the supply water
be shut off along with the facility circuit breaker. Allow sufficient time for
the DI heater and plumbing to cool down before inspection.
