AERCO BMK 1.5 LN October 2012 - Manual (Page 77)

CHAPTER 6
SAFETY DEVICE TESTING
PR1: 10/18//12 AERCO International Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 Page 77 of 166
GF-120
OMM-0041 0E
Benchmark 1.5LN Low NOx Boiler
Installation, Operation and Maintenance Manual
Set the unit’s ON/OFF switch to the OFF position. Place the unit in manual mode and set 1.
the valve position between 25% and 30%.
Remove the Air/Fuel Valve cover by rotating the cover counterclockwise to unlock it and 2.
then lift up (see Figure 6-5).
Remove one of the two wires (#171 or #172) from the Purge Switch (Figure 6-6). 3.
Initiate a unit start sequence. 4.
The unit should begin it’s start sequence, then shut down and display PRG SWITCH 5.
OPEN DURING PURGE.
Replace the wire on the Purge Switch and depress the CLEAR button. The unit should 6.
restart.
6.11 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:
Set the unit’s ON/OFF switch to the OFF position. 1.
Place the unit in Manual Mode and set the valve position between 25% and 30%. 2.
Remove the Air/Fuel Valve cover (Figure 6-5) by rotating the cover counterclockwise to 3.
unlock and lift up to remove.
Remove one of the two wires (#169 or #170) from the Ignition Switch (Figure 6-6). 4.
Initiate a unit start sequence. 5.
The unit should begin its start sequence and then shut down and display IGN SWITCH 6.
OPEN DURING IGNITION.
Replace the wire on the Ignition Switch and press the CLEAR button. The unit should 7.
restart.
AIR/FUEL VALVE COVER
(ROTATE CCW TO REMOVE)
Figure 6-5: Air/Fuel Valve Cover Location