Table 6-1, He- 111 − scheduled maintenance – AERCO SWDW68 U-Tube Double-Wall Heaters w/ECS User Manual
Page 42
HE-
111 − SCHEDULED MAINTENANCE
Rev B Mar 2013
6-4
5. If there is evidence of scale build-up, disconnect the conduit and electrical power lines from the pump
and service or replace it, as necessary.
6. If there is no evidence of scale build-up on the recirculation pump, reinstall it and reconnect the wiring
and flanges.
Table 6-1. Recommended Maintenance Schedule
Maintenance Check
Week
(6.3)
Month
(6.4)
Quarter
(6.5)
Six Months
(6.6)
Year
(6.7)
□
Tube Leak
√
□
Control Valve Leak
√
□
Vacuum Breaker(s)
√
□
Shell Solids*
√
□
Over-temperature Switch Alarm
√
□
Temperature Controller
√
□
Actuator Adjustment
√
□
Steam Strainer
√
□
Over-temperature Switch
√
□
Temperature Sensor
√
□
Recirculation Pump
√
* Perform the first test for shell solids upon completion of the first three months of heat exchanger
operation. Depending upon the results (see 6.4.1, Step 5), repeat this test quarterly, semi-
annually or annually.