Water Temperature Fault Test - Watts AERCO Edge CFR 3000 Operator's And Service Manual

SECTION 5 SAFETY DEVICE TESTING
9. Close the drain and pressure relief valve used in draining the unit.
10. Open the water shut-off valve in the return piping to the unit.
11. Open the water supply shut-off valve to the unit to refill.
12. After shell is full, press LOW WATER LEVEL – RESET button to reset the low water cutoff.
13. Press the CLEAR button to reset the FAULT LED and clear the displayed error message.
14. Set the Enable/Disable switch to Enable. The unit is now ready for operation.

5.5 Water Temperature Fault Test

A high-water temperature fault is simulated by adjusting the Automatic Reset Over-Temperature switch
by doing the following:
1. Start the unit in the normal operating mode and allow the unit to stabilize at its setpoint.
2. On the Automatic Reset Over-Temperature switch, note the current setting, then:
3. Press the Set button two times, to activate a setting change.
4. Use the Down arrow to lower the setting to a temperature below the Outlet temperature displayed
on the Controller's front face (see Figure 5-5b).
5. Press the Set and Down arrow at the same time to save that temperature setting.
NOTE: If the Controller's is not configured to display outlet temperature, go to the
→ Unit → Front Panel Configuration
Figure 5-3a: Over Temperature Limit Switches
6. Once the Automatic Reset Over-Temperature switch setting is approximately just below the actual
outlet water temperature, the unit should shut down, the FAULT indicator should flash, and a High-
Water Temp Switch Open fault message be displayed. It should not be possible to restart the unit.
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screen and set the Upper-Right Display parameter to Water Outlet.
Figure 5-3b: Edge Controller Front Face
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Main Menu → Advanced Setup
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