AERCO BMK 3.0 LN Dual Fuel Jan 2011 - Manual (Page 53)

SAFETY DEVICE TESTING
PARTIAL LEFT SIDE VIEW
BLOWER
AIR
INLET
BLOCKED
AIR INLET
SWITCH
AIR/FUEL
VALVE
MANUAL GAS
SHUTOFF VALVE
HANDLE
PROPANE
PART
O
F
FRAM
E
GAS I
N
LETS
NATURAL GAS
SS
O
Vs
(
2)
Figure 6-3
Manual Gas Shut-Off Valve Location
8. Once flame is proven, close the manual gas
valve located between the SSOV and the
Air/Fuel Valve.
9. The unit should shut down and execute an
IGNITION RETRY cycle by performing the
following steps:
(a) The unit will execute a shutdown purge
cycle for a period of 15 seconds and
display WAIT FAULT PURGE.
(b) The unit will execute a 30 second re-
ignition delay and display WAIT RETRY
PAUSE.
(c) The unit will then execute a standard
ignition sequence and display WAIT
IGNITION RETRY
.
10. Since the manual gas shutoff valve is still
closed, the unit will shut down and display
FLAME LOSS DURING IGNITION
following
the IGNITION RETRY cycle.
11. Open the valve previously closed in step 8.
12. Press the CLEAR button. The unit should
restart and fire.
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 between 25% and 30%.
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.
(b) The unit will then execute a standard
ignition sequence and display WAIT
IGNITION RETRY
.
4. The unit should perform two IGNITION
RETRY cycles and then shut down on the
third successive ignition attempt. The unit will
display AIRFLOW FAULT DURING PURGE.
5. Re-enable the blower output drive voltage by
performing the following steps:
(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 VALVE
POSITION 0-10V is displayed, then
press the ENTER key.
6-5