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GF-127
OMM-0052_0E
6.12 IGNITION SWITCH OPEN DURING IGNITION
The Ignition Switch (and the Purge Switch) is located on the Air/Fuel Valve. To check the
switch, proceed as follows:
1.
Set the unit's ON/OFF switch to the OFF position.
2.
Place the unit in Manual Mode and set the valve position to 34%.
3.
Remove the Air/Fuel Valve cover (Figure 6-5) by rotating the cover counterclockwise to
unlock and lift up to remove.
4.
Remove one of the two wires (#169 or #170) from the Ignition Switch (Figure 6-6).
5.
Initiate a unit start sequence.
6.
The unit should begin it's start sequence and then shut down and display IGN SWITCH
OPEN DURING IGNITION.
7.
Replace the wire on the Ignition Switch and press the CLEAR button. The unit should
restart.
6.13 PURGE SWITCH OPEN DURING PURGE
The Purge Switch (and Ignition Switch) is located on the Air/Fuel Valve. To check the switch,
proceed as follows:
1.
Set the unit's ON/OFF switch to the OFF position. Place the unit in manual mode and set
the valve position to 34%.
2.
Remove the Air/Fuel Valve cover by rotating the cover counterclockwise to unlock it and
then remove the cover (see Figure 6-5).
3.
Remove one of the two wires (#171 or #172) from the Purge Switch (Figure 6-6).
4.
Initiate a unit start sequence.
5.
The unit should begin it's start sequence, then shut down and display PRG SWITCH
OPEN DURING PURGE.
6.
Replace the wire on the Purge Switch and depress the CLEAR button. The unit should
restart.
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
PR2: 04/22/13
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
Figure 6-4: SSOV Actuator Cover Location
CHAPTER 6: SAFETY DEVICE TESTING
Page 71 of 158
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