Installed a 47-Gallon Short Electric Hot Water Heater in the crawl space. Capped the water coil lines and routed the piping to the new water heater. Filled the water heater with water and checked all piping and fittings for leaks. Purged air out of the water heater. Performed pm on oil boiler Brushed and vacuumed flue pipe and heat exchanger Replaced oil filter, nozzle, and strainer Checked all electrical connections and safeties Performed combustion and smoke tests 9.5%o2 0ppm co 0 smoke