AERCO BMK 2.0 LN Dual Fuel Serial G-11-2402 and UP - Manual (Page 69)

CHAPTER 6: SAFETY DEVICE TESTING
PR2: 04/22/13 Page 69 of 160
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0052_0E
GF-127
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
Figure 6-3: Manual Gas Shut-Off Valve Location (Partial Left-Side View)
6.10 AIR FLOW FAULT TESTS
These tests check the operation of the Blower Proof Switch and Blocked Inlet Switch shown in
Figure 6-3.
1. Disable the blower output drive voltage as follows:
(a) Press the MENU key until CONFIGUR-ATION MENU is displayed.
(b)
Press the ▲ arrow key until the ANA-LOG 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 of 34%.
3. The unit should shut down and execute an IGNITION RETRY cycle by performing the
following steps:
(a) The unit will execute a 30 second re-ignition delay and display WAIT RETRY
PAUSE.
PROPANE
SSOV
MANUAL
GAS
SHUTOFF
VALVE
BLOWER
PROOF
SWITCH
AIR/FUEL
VALVE
BLOCKED
INLET
SWITCH
NATURAL
GAS
SSOV