Purge Switch Open During Purge - Benchmark BMK 1500 User Manual

ACTUATOR

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
(see Figure 6-6).
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 its 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.
OMM-0097_0C
GF-142
Benchmark 1500 - 2000 Boilers
CHAPTER 6 – SAFETY DEVICE TESTING
SSOV
COVER
Figure 6-5: SSOV Actuator Cover Location
Purge Switch Open During Purge
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
ACTUATOR
COVER
SCREW
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