Chapter 5
Innovation Series Water Heaters
GF-128
Safety Device Testing
USER MANUAL
OMM-0079_0B
07/21/11 AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph: 800-526-0288
Page
51
of
200
6. Set the
ON/OFF
switch to the
ON
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 fault to qualified service
personnel.
7. Close the drain and pressure relief valve used in draining the unit.
8. Open the water shut-off valve in the return piping to the unit.
9. Open the water supply shut-off valve to the unit to refill.
10. After the shell is full, press the
LOW WATER LEVEL RESET
button to reset the low water cutoff.
11. Press the
CLEAR
button to reset the
FAULT
LED and clear the displayed error message.
12. Set the
ON/OFF
switch to the
ON
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 over-temperature switch. This
switch is accessible from the front of the unit as shown in Figure 5-2.
1. Start the unit in the normal operating mode. Allow the unit to stabilize at its setpoint.
2. Lower the adjustable over-temperature switch setting to match the displayed OUTLET
TEMPERATURE.
3. Once the adjustable over-temperature 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 adjustable temperature limit switch setting is above the actual outlet
water temperature.
6. Once the adjustable over-temperature 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.
7. Reset the adjustable over-temperature switch to its original setting.
8. The unit should start once the adjustable temperature limit switch setting is above the actual outlet
water temperature.