AERCO BMK 6000 - Manual (Page 84)

Benchmark 6000 Boiler Installation, Operation & Maintenance Manual
CHAPTER 6 – SAFETY DEVICE TESTING
Page 84 of 210 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0086_0D
03/20/14
Ph.: 800-526-0288
GF-133
Figure 6-4: Blower Proof Switch & Blocked Inlet Switch Locations
6.8.1 Blower Proof Switch Test
Blower Proof Switch Test
1. Disable the blower output drive voltage as follows:
a) Press the MENU key until CONFIGURATION MENU is displayed.
b)
Press the ▲ arrow key until the ANALOG OUTPUT function is displayed, then press
the CHANGE key.
c)
Press the ▼ arrow key until OFF is displayed, then press the ENTER key.
2. Start the unit in the Manual Mode at a valve position between 25% and 30%.
3. The unit should shut down and Lockout, showing AIRFLOW FAULT DURING PURGE in
the display.
4. The unit should perform one IGNITION RETRY cycle and then shut down, since the blower
is disabled. The unit will then display AIRFLOW FAULT DURING PURGE.
5. Re-enable the blower output drive voltage by performing the following steps:
a) Press the MENU key until CONFIGURATION MENU is displayed.
b)
Press the ▲ arrow key until the ANALOG OUTPUT function is displayed, then press
the CHANGE key.
c)
Press the ▲ arrow key until VALVE POSITION 0-10V is displayed, then press the
ENTER key.
d) Press the CLEAR button to clear the airflow fault.
6. Once the unit has proved flame, turn off the blower again by going to the Configuration
Menu, Analog Output menu item and select OFF.
7. The Blower Proof Switch will open and the blower should stop. The unit should shut down
and display AIRFLOW FAULT DURING RUN.
BLOCKED INLET
SWITCH
BLOWER PROOF
SWITCH
AIR/FUEL VALVE
ASSEMBLY
MANUAL SHUT-
OFF VALVE
BLOWER