AERCO RECON 1000 - Manual (Page 68)

RECON Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 5 – SAFETY DEVICE TESTING
Page 68 of 178 AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 OMM-0103_0A
PRI: 10/28/2014 Phone: 800-526-0288 GF-147
5.2 LOW GAS PRESSURE FAULT TEST
Refer to Figure 5-1 and ensure that the leak detection ball valve located at the high gas
pressure switch is closed.
Low Gas Pressure Fault Test
1. Remove the 1/4“ plug from the ball valve at the low gas pressure switch, shown in the lower
portion of Figure 5-1, and then install an NPT to barbed fitting in its place.
2. Install a 0 – 16“ W.C. manometer or a W.C. gauge where the 1/4" plug was removed.
3. Slowly open the ball valve near the low gas pressure switch.
4. Place the unit in Manual Mode and adjust the air/fuel valve position (% open) between 25
and 30%.
5. While the unit is firing, slowly close the external manual gas shut-off valve.
6. Both the RECON 1000 and RECON 500 units should shut down and display a GAS
PRESSURE
fault message at approximately 3.6” W.C. The FAULT indicator should also
start flashing.
7. Fully open the external manual gas shut-off valve and press the CLEAR button on the
Control Box.
8. The fault message should clear and the FAULT indicator should go off. The unit should
restart.
9. Upon test completion, close the ball valve and remove the manometer. Replace the 1/4“
plug removed in step 1.
Figure 5-1: Low and High Gas Pressure Testing
LOW GAS
PRESSURE
SWITCH
HIGH GAS
PRESSURE
SWITCH
MANUAL
SHUTOFF
VALVE
TO AIR/FUEL
VALVE
LEAK
DETECTION
BALL VALVE
1/4" NPT PLUG
(Install manometer here for
HIGH GAS PRESSURE TEST)
GAS INLET
SSOV
1/4" NPT PLUG
(Install manometer here for
LOW GAS PRESSURE TEST)
LEAK
DETECTION
BALL VALVE