AERCO RECON 1000 - Manual (Page 69)

RECON Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 5 – SAFETY DEVICE TESTING
OMM-0103_0A AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 Page 69 of 178
GF-147 Phone: 800-526-0288 PRI: 10/28/2014
5.3 HIGH GAS PRESSURE FAULT TEST
To simulate a high gas pressure fault, refer to Figure 5-1 and proceed as follows:
High Gas Pressure Fault
1. Remove the 1/4“ plug from the leak detection ball valve at the high pressure switch, shown
in Figure 5-1, and then install an NPT to barbed fitting in its place.
2. Install a 0 – 16” W.C. manometer (or W.C. gauge) where the 1/4” plug was removed.
3. Slowly open the leak detection ball valve
4. Start the unit in Manual mode at a valve position between 25% and 30%.
5. Slowly increase the gas pressure using the adjustment screw on the SSOV.
6. The unit should shut down and display a GAS PRESSURE fault message when the gas
pressure exceeds 3.0”W.C. for the RECON 500 and 4.0” W.C. for the RECON 1000. The
FAULT indicator should also start flashing.
7. Reduce the gas pressure back to 2.2” W.C. for the RECON 500 and 3.0” W.C. for the
RECON 1000.
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 1/4“
plug removed in step 1.
5.4 LOW WATER LEVEL FAULT TEST
To simulate a low water level fault:
Low Water Level Fault Test
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, open the unit’s P&T relief
valve (see Figure 5-9, below) 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%.
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 P&T 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.