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XI Start-up and Checkout
Use the following procedure for initial start-up of the boiler:
1) Verify that the venting, water piping, gas piping and electrical system are installed properly.
2) Conrmallelectrical,waterandgassuppliesareturnedoffatthesourceandthatventisclearofobstructions.
3) Conrmthatallmanualshut-offgasvalvesbetweentheboilerandgassourceareclosed.
4) Ifnotalreadydone,ushthesystemtoremovesediment,ux,andtracesofboileradditives.
5) Fill the boiler and hydronic system with water meeting the following requirements below (also see the note on the next page):
• pH between 6.5 and 9.5
• Hardness less than 7 grains/gallon
• Chlorides less than 200ppm
• Pressurize the system to at least 12 psi at the boiler
6) Bleed air from the heat exchanger using the manual air vent in the top left side of the heat exchanger (Figure 11.1). To do
this install a piece of ¼” ID clear tubing over the hose barb and route the tubing to a location where water will not damage
controls or nearby construction. Turn vent counter clockwise and allow heat exchanger to vent until a steady stream of water
is observed. Close vent and remove hose.
7) Checkallgaspipingforleaksandpurgepipingsectionsthatarelledwithair.RefertotheNational Fuel Gas Code for ad-
ditional information on testing and purging gas lines.
8) Conrmventsystemiscompleteandfreeofobstructionsbeforeattemptingtoreboiler.
9) Inspect all wiring for loose, uninsulated or miswired connections.
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