AERCO BMK 6000 Dual Fuel - Manual (Page 92)

Benchmark 6000 DF Installation, Operation & Maintenance Manual
CHAPTER 6 – SAFETY DEVICE TESTING
Page 92 of 219 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0096_0B
03/21/2014
Ph.: 800-526-0288
GF-141
6.9 SSOV PROOF OF CLOSURE SWITCH
For both the Natural Gas and Propane gas trains, the downstream SSOV (see Figure 6-1B)
contains the proof of closure (POC) switch. The proof of closure switch circuit is checked as
follows:
SSOV Proof of Closure Switch
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. Refer to Figure 6-1B to locate the downstream SSOV.
4. Remove the cover from the SSOV by loosening the screw shown in Figure 6-7. Lift off the
cover to access the terminal wiring connections.
5. Disconnect wire #148 from the SSOV to “open” the proof of closure switch circuit.
6. The unit should fault and display SSOV SWITCH OPEN.
7. Replace wire #148 and press the CLEAR button.
8. Set the ON/OFF switch to the ON position to start the unit.
9. Remove the wire again when the unit reaches the purge cycle and PURGING is displayed.
10. The unit should shut down and display SSOV FAULT DURING PURGE.
11. Replace the wire on the SSOV and press the CLEAR button. The unit should restart.
Figure 6-7: Downstream SSOV Actuator Cover Location
SSOV
ACTUATOR
COVER COVER
SCREW