AERCO BMK 2000DF - Manual (Page 79)

Benchmark 1500DF - 2000DF Boilers
CHAPTER 6 – SAFETY DEVICE TESTING
OMM-0098_0A AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 79 of 196
GF-144 Ph.: 800-526-0288 04/01/2014
Low Gas Pressure Fault Test – Continued
7. The unit should shut down and display a GAS PRESSURE fault message at
approximately 2.6” W.C..
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“
plug removed in step 1.
6.3 HIGH GAS PRESSURE TEST
The instructions below apply to both the BMK 1500DF and BMK 2000DF and to both the
NATURAL GAS and PROPANE gas trains.
Figure 6-1b:
BMK 1500DF/2000DF:
High Gas Pressure Fault Test
To simulate a high gas pressure fault, refer to Figure 6-1b and perform the following steps:
TO AIR/FUEL VALVE
MANUAL SHUT-
OFF VALVE
NATURAL GAS
LOW GAS PRESSURE
SWITCH
NATURAL GAS
HIGH GAS
PRESSURE SWITCH
PROPANE
SSOV
PROPANE INLET
NATURAL GAS
SSOV
PROPANE
LOW GAS PRESSURE
SWITCH
PROPANE
HIGH GAS PRESSURE
SWITCH
1/4” NPT PLUG
(Install manometer here for
NATURAL GAS
HIGH gas
pressure fault test
1/4” NPT PLUG
(Install manometer here for
PROPANE
HIGH gas pressure
fault test
NATURAL GAS INLET
NATURAL GAS
HIGH GAS PRESSURE LEAK
DETECTION BALL VALVE
PROPANE
GAS LEAK DETECTION
BALL VALVE