Operating The Boiler; Operating The Boiler For The First Time - Navien NFC-250/175H Installation Manual

11. Operating the Boiler

11.1 Operating the Boiler for the First Time

FOR YOUR SAFETY READ BEFORE OPERATING
WARNING: If you do not follow these instructions exactly, a fire or explosion may
result, causing property damage, personal injury or loss of life.
A. This appliance does not have a pilot. It is equipped with an ignition device which automatically
lights the burner. Do NOT try to light the burner by hand.
B. BEFORE OPERATING, smell all around the appliance area for gas. Be sure to smell next to the floor
because some gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
- Do NOT try to light any appliance.
- Do NOT touch any electrical switch.
- Do NOT use any phone in your building.
- Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's
instructions.
- If you cannot reach your gas supplier, call the fire department.
C. Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not
push in or turn by hand, don't try to repair it, call a licensed professional. Force or attempted repair
may result in a fire or explosion.
D. Do not use this appliance if any parts have been under water. Immediately call a licensed
professional to inspect the appliance and to replace any part of the control system and any gas
control which has been under water.
1. STOP! Read the safety information above this label.
2. Turn off all electrical power of the appliance.
3. Set the thermostat or other operating control to the lowest setting.
4. This appliance is equipped with an ignition device which
automatically lights the burner.
Do NOT try to light the burner by hand.
5. Close the main gas shut off valve.
6. Wait (5) minutes to clear out any gas. Then smell for gas around
the appliance and near the floor.
If you smell gas, STOP! Follow "B" in the safety information above.
If you don't smell gas, go to the next step.
7. Open the main shut off valve.
8. Turn on the appliance.
9. Set the thermostat or other operation control to desired setting.
10. If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance" and call your
service technician or gas supplier.
1. Turn off all electric power to the appliance if service is to be performed.
2. Set the thermostat or other operating control to the lowest setting.
3. Close the main gas shut off valve.
106 Operating the Boiler
OPERATING INSTRUCTIONS
TO TURN OFF GAS TO APPLIANCE
OPEN
CLOSE
OPEN
CLOSE
Manual Gas Valve (Main Valve)