AERCO Innovation (G-10-1350 to G-11-0563) - Manual (Page 50)

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Innovation Series Water Heaters Chapter 5
OMM-0079_0B USER MANUAL Safety Device Testing
Page 50 of 200 AERCO International, Inc. · 100 Oritani Dr. · Blauvelt, NY 10913 · Ph.: 800-526-0288
07/21/11
Figure 5-1. Low & High Gas Pressure Testing
5.3 HIGH GAS PRESSURE TEST
To simulate a high gas pressure fault, refer to Figure 5-1 and proceed as follows:
1. Remove the 1/8“ plug from the leak detection ball valve shown in Figure 5-1.
2. Install a 0 – 16” W.C. manometer (or W.C. gauge) where the 1/8” plug was removed.
3. Slowly open the leak detection ball valve
4. Start the unit in Manual mode at a valve position (firing rate) of 25%.
5. Slowly increase the gas pressure using the adjustment screw on the SSOV.
6. The unit should shut down and display a HIGH GAS PRESSURE fault message when the gas
pressure exceeds 4.0” W.C. The FAULT indicator should also start flashing.
7. Reduce the gas pressure back to 2.8” W.C.
8. Press the CLEAR button on the Control Box to clear the fault.
9. The fault message should clear and the FAULT indicator should go off. The unit should restart.
10. Upon test completion, close the ball valve and remove the manometer. Replace the 1/8“ plug
removed in step 1.
5.4 LOW WATER LEVEL FAULT TEST
To simulate a low water level fault:
1. Set the ON/OFF switch to the OFF 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. Place the unit in the Manual Mode and raise the valve position above 30%.