Benchmark 750-3000 Boiler Installation & Startup Manual
SECTION 4 – INITIAL START-UP
OMM-0121_D • GF-205 • 5/9/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 73 of 122
4.6.2 Switchover from PROPANE to NATURAL GAS
Switchover from PROPANE to NATURAL GAS Instructions
1. Set the ON/OFF switch on the C-More Controller to the OFF position.
2. Close the external Propane Gas supply valves.
3. Open the external Natural Gas supply valves.
4. Refer to Figure 4-5 and locate the Fuel Selector Switch on the front of the unit.
5. Set the Fuel Selector Switch to the NATURAL GAS position. A GAS PRESSURE FAULT
message will be displayed on the C-More Controller.
6. Clear the Gas Pressure Fault by pressing the CLEAR key.
7. Apply AC power to the boiler.
8. Press the MENU key once. SETUP MENU will be displayed.
9. Press the ▲ arrow key once. PASSWORD will be displayed.
10. Press the CHANGE key. PASSWORD will begin to flash.
11. Using the ▲ arrow key, increment the display and stop at 159.
12. Press the ENTER key to store the displayed password.
13. PASSWORD 1
will be displayed, indicating that the valid Level 1 password has been
stored.
14. Next, access the Configuration menu by pressing the MENU key once.
15. Using the ▲ and ▼ arrow keys, scroll through the Configuration menu and stop at FUEL
TYPE.
16. Press the CHANGE key. FUEL TYPE will begin to flash.
17. Press the ▼ arrow key. NATURAL GAS will be displayed.
18. Press the ENTER key to store the Natural Gas Fuel type.
19. Replace the front door panel previously removed from the boiler.
This completes the steps necessary to switch from PROPANE Gas to NATURAL GAS.
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