Benchmark 2.0 LN Installation, Operation & Maintenance Manual
CHAPTER 6 – SAFETY DEVICE TESTING
Page 78 of 168 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0046_0J
06/18/2015 Phone: 800-526-0288 GF-123
11. Replace the wire on the SSOV and press the CLEAR button. The unit should restart.
ACTUATOR
COVER
SCREW
SSOV
ACTUATOR
COVER
Figure 6-4: SSOV Actuator Cover Location
6.10 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 between 25% and 30%.
2. Remove the Air/Fuel Valve cover by rotating the cover counterclockwise to unlock it and
then lift up (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.
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:
1. Set the unit’s ON/OFF switch to the OFF position.
2. Place the unit in Manual Mode and set the valve position between 25% and 30%.
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.
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