1 Gas Hot Water Boiler: Burnham Series x2 Boiler- Perform a tune-up and cleaning to help ensure reliable and safe operation. Inspect for cracks & deterioration of Heat Exchanger Check and clean Burners tubes and heat exchanger- ok, vacuumed-ok Check and clean flame sensor/flame rod and ignition Assembly-ok Spark igniter. Check Safety Controls-ok Check electrical wiring and components-ok Check Gas valve & Gas Line-ok Check Combustion Air & Exhaust-ok Check Temperatures & Water pressure settings; 20psi Performance-ok Check and run Thermostats- operating well at this time. Check circulator pumps-ok amps and voltage check. Check water feeder, low water cut off, relief valve, vent damper and expansion tank. Check for water leak no leakage at this time. Ran and monitored for good operations. All zones are fine supply and return lines getting hot. Perform check for 50gal HWH. Check for water leak, no leakage at this time. Check control gas valve-ok Check air Combustion and Draft-ok Ran and mo