Lochinvar Condensing Boiler OFN3001

Ensure water meets manual requirements before filling system

Fill to correct system pressure

Enter the minimum cold water fill pressure

Did the pressure rise when the boiler was turned ON?

Check the system for leaks during initial fill and boiler startup

Describe any leaks found and repairs made

Check for gas odor around the boiler

If gas odor is detected, shut down the boiler immediately

Locate the source of the gas leak using a bubble test

Repair the gas leak immediately

Do not restart the boiler until the leak is repaired

Flush the entire heating system prior to fill and start-up

Clean the entire heating system with an approved pre-commissioning cleaner

Specify the manufacturer's recommendation followed for cleaning

Clean all water filtering devices in the system

Flush the cleaning solution out of the entire system

Measure the water hardness in grains per gallon

Is the water hardness between 5 and 12 grains per gallon?

Consult local water treatment companies for hard water areas (above 12 grains per gallon hardness)

Measure the pH level of the water

Is the pH level between 6.5 and 8.5?

Total Dissolved Solids (TDS) Check

Measure the Total Dissolved Solids (TDS) in ppm

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.