A.O. Smith 110-310-510 – PURGE THE GAS LINE OF AIR

1) The unit should not be running during this procedure. Turn off power to the unit.
2) Turn the gas valve to the off position (perpendicular to the gas line).
3) Loosen the gas line on the unit side of the gas valve (at a flare fitting or union).
4) Next open the gas valve very slightly until you can smell gas by wafting the air towards your nose. This means any air previously in the gas line has been removed and only gas remains.
5) Turn gas back off and re?tighten gas line.
6) Turn gas back on and check for leaks. Spray water & dish soap mixture onto fittings. No bubbles means there are no leaks.