Appendix k, Benchmark 3.0 dual-fuel switchover instructions – AERCO BMK 3.0 LN Dual-Fuel Series Gas Fired Low NOx Boiler System User Manual

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APPENDIX K

K-1

BENCHMARK 3.0 DUAL-FUEL

SWITCHOVER INSTRUCTIONS

Prior to operating a Benchmark 3.0 Dual-Fuel Unit on either Natural Gas or Propane, a number

of checks and procedural steps must be performed prior to performing the initial start-up and

combustion calibration, including adjusting the Max Fire Rate setting in the Configuration Menu

of the C-More Control Box.

Detailed instructions for performing these tasks are presented in the following sections.

SWITCHOVER FROM NATURAL GAS TO PROPANE

To switch from Natural Gas to Propane operation, proceed as follows:

Refer to Figure K-1 and locate the Fuel Selector Switch on the front of the unit.

Set the Fuel Selector Switch to the

PROPANE position. A Low Gas pressure Fault

message will be displayed on the Control Box.

Clear the Low Gas Pressure Fault by pressing the

CLEAR key.

Set the

ON/OFF switch on the C-More /control Box to the ON position.

Press the

MENU key once. Setup Menu will be displayed.

Press the ▲ arrow key once. Password will be displayed.

Press the

CHANGE key. Password will begin to flash.

Using the ▲ arrow key, increment the display and stop at 159.

Press the

ENTER key to store the displayed password.

10.

Password 1 will be displayed, indicating that the valid Level 1 password has been

stored.

11.

Next, access the Configuration Menu by pressing the

MENU key once.

12.

Using the ▲ and ▼ arrow keys, scroll through the Configuration Menu and stop at Max

Valve Position.

13.

Press the

CHANGE key. The Max Valve Position will begin to flash.

14.

Press the ▼ arrow key and decrease the Max Valve Position to 75%.

15.

Press the

ENTER key to store the 75% Max Valve Position.

16.

Using the ▲ and ▼ arrow keys, scroll through the Configuration Menu and stop at Fuel

Type.

17.

Press the

CHANGE key. Fuel Type will begin to flash.

18.

Press the ▲ arrow key. Propane will be displayed.

19.

Press the

ENTER key to store the Propane Fuel type.

20.

This completes the steps necessary to switch from Natural Gas to Propane operation.