APPENDIX K
K-1
BENCHMARK DUAL-FUEL
PROPANE SWITCH-OVER INSTRUCTIONS
Prior to operating a Benchmark Dual-Fuel Unit using propane, the Start and Stop levels must be
changed to 28% and 24%. In addition, the following valves must be set to the following
positions:
• The Diverter Valve handle shown in Figure 1 must be set to the PROPANE (UP) position.
• The Air Injection Valve handle shown in Figure 2 must be set to the Open position.
START/STOP LEVEL CHANGES
The Start and Stop levels are changed using the front panel controls on the C-More Control
Box. Proceed as follows:
1. Press the MENU key once. Setup Menu will be displayed.
2. Press the ▲ arrow key once. Password will be displayed.
3. Press the CHANGE key. Password will begin to flash.
4. Using the ▲ arrow key, increment the display and stop at 6817.
5. Press the ENTER key to store the displayed password.
6. Password 2 will be displayed, indicating that the valid Level 2 password has been
stored.
7. Next, access the Calibration Menu by pressing the MENU key four times.
8. Press the ▼ arrow key one time. Start Level 20% should be displayed indicating that it
is currently set for Natural Gas operation.
9. Press the CHANGE key. The Start Level will begin to flash.
10. Press the ▲ arrow key and increase the Start Level to 28%.
11. Press the ENTER key to store the 28% Start Level.
12. Press the ▼ arrow key again. Stop Level 16% should be displayed indicating that it is
currently set for Natural Gas operation.
13. Press the CHANGE key. The Stop Level will begin to flash.
14. Press the ▲ arrow key and increase the Stop Level to 24%.
15. Press the ENTER key to store the 24% Stop Level.
16. Return to the Operating Menu by pressing the BACK key twice.
17. Refer to Figure 1 and verify that the Diverter Valve handle is set to the PROPANE (UP)
position.
18. Refer to Figure 2 and verify that the Air Injection Valve is Open
IMPORTANT
Remember to change the Start/Stop Levels back to 20% and 16%
prior to switching back to Natural Gas operation. Also, ensure that
the Diverter Valve handle is properly positioned as shown in
Figure 1 and the Air Injection Valve shown in Figure 2 is Closed.
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