Watts Aerco INN 1060N - Low Water Level Fault Test; Water Temperature Fault Test

Innovation - Edge [i] Installation, Operation, Maintenance Manual
CHAPTER 5 – SAFETY DEVICE TESTING
OMM-0143_A • GF-216 • 9/6/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 69 of 170
5.4 LOW WATER LEVEL FAULT TEST
To simulate a low water level fault:
Low Water Level Fault Test Instructions
1. Set the Controller’s Enable/Disable switch to the Disable position.
2. Close the water shut-off valves in the supply and return piping to the unit.
3. Slowly open the drain valve on the rear of the unit. If necessary, the unit’s relief valve may
be opened to aid in draining.
4. Continue draining the unit until a Low Water Level fault message is displayed and the
FAULT indicator flashes.
5. Put the unit in Manual Mode by going to the Main Menu → Diagnostics → Manual Run
and setting Manual Mode to Enabled.
6. Start the unit and raise the valve position above 30%.
7. Set the Enable/Disable switch to the Enable position. The READY light should remain off
and the unit should not start. If the unit does start, shut the unit off immediately and refer
the fault to qualified service personnel.
8. Close the drain and pressure relief valve used in draining the unit.
9. Open the water shut-off valve in the return piping to the unit.
10. Open the water supply shut-off valve to the unit to refill.
11. After the shell is full, press the Low Water Level Reset button to reset the low water cutoff.
12. Press the CLEAR button to reset the FAULT LED and clear the displayed error message.
13. Set the Enable/Disable switch to the Enable position. 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 Limit switch on the front of the unit (see Figure 5.5).
Water Temperature Fault Test Instructions
1. Start the unit in the normal operating mode. Allow the unit to stabilize at its setpoint.
2. Lower the adjustable Automatic Reset Over-Temperature Limit switch setting to match
the outlet temperature displayed on the Controller.
3. Once the Automatic Reset Over-Temperature Limit switch setting is approximately at, or
just below, the actual outlet water temperature, the unit should shut down. The FAULT
indicator should start flashing and a High-Water Temp Switch Open fault message should
be displayed. It should not be possible to restart the unit.
4. Reset the adjustable over-temperature switch to its original setting.
5. The unit should start once the Automatic Reset Over-Temperature Limit switch setting is
above the actual outlet water temperature.