Lochinvar Condensing Boiler OFN2501

Check for gastight seal at every connection, seam, and vent piping

Is the venting system sealed gastight to prevent flue gas spillage and carbon monoxide emissions?

Check around the boiler for gas odor (connecting gas supply piping)

Is there any evidence of a gas leak?

Shut down the boiler immediately if a gas leak is detected

Describe the location and nature of the gas leak

Perform a bubble test to find the leak source

Was the leak repaired successfully?

Has the boiler been restarted after ensuring the leak is corrected?

Disconnect the two external wires connected to the enable terminals on the connection board.

Connect a voltmeter across the two incoming wires and close each thermostat, zone valve, and relay in the external circuit one at a time. Record the voltmeter reading across the incoming wires.

If a voltage occurs, was the external wiring checked and corrected?

Reconnect the external thermostat circuit wires to the connection board.

Turn the main power switch to the “OFF” position.

Shut off gas supply at the manual gas valve in the gas piping to the appliance.

Remove the 1/8" pipe plug on the flange to the factory supplied gas shutoff valve and install a suitable 1/8" fitting for the manometer tubing.

Place the tubing of the manometer over the tap once the 1/8" fitting is installed.

Slowly turn on the gas supply at the factory installed manual gas valve.

Vent any remaining air from the system using manual vents