Aerco Benchmark 2000 User Manual

Benchmark 1500 - 2000 Boilers
CHAPTER 6 – SAFETY DEVICE TESTING
Page 74 of 182 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0097_0E
10/01/2015 Ph.: 800-526-0288 GF-142
6.2 LOW GAS PRESSURE TEST
To simulate a low gas pressure fault, refer to Figure 6-1a and perform the following steps:
Figure 6-1a: BMK 1500/2000: Low Gas Pressure Test
Low Gas Pressure Fault Test
1. Close the leak detection ball valve located at the Low Gas Pressure switch.
2. Remove the 1/4" NPT plug from the ball valve at the Low Gas Pressure switch.
3. Install a 0 - 16” W.C. (0 - 4000 Pa) manometer or gauge where the 1/4" plug was
removed.
4. Slowly open the ball valve near the Low Gas Pressure switch.
5. Place the unit in MANUAL mode and adjust the Air/Fuel Valve position (% open) between
25% and 30%.
6. While the unit is firing, slowly close the external manual gas shut-off valve.
7. The unit should shut down and display a GAS PRESSURE fault message at approximately
2.6” W.C. (648 Pa) for both 1500 & 2000 units.
8. Fully open the external manual gas shut-off valve and press the CLEAR button on the
Control Box.
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"
NPT plug removed in step 2.
NATURAL GAS INLET
SSOV
HIGH GAS
PRESSURE
SWITCH
LOW GAS
PRESSURE
SWITCH
MANUAL
SHUT-OFF
VALVE
1/4” NPT PLUG
Install manometer here for
LOW gas pressure fault test.
LOW GAS BALL VALVE
TO
AIR/FUEL
VALVE

Aerco Benchmark 2000 Specifications

General

Brand	Aerco
Model	Benchmark 2000
Category	Boiler
Language	English