User Guide

72
WARNING
Asphyxiation Hazard. Do not operate the boiler without the ball and ball support in place. Doing so
could result in ue gas leakage into the indoors resulting in personal injury or death from Carbon
Monoxide (CO) poisoning.
NOTICE
Attempting to clean the heat exchanger or trap with anything other than water could result in
condensate backup, causing the boiler to shut-down.
CAUTION
Do not over tighten re door mounting nuts. Doing so could break the re door mounting studs. If any
of these studs are damaged, the heat exchanger must be replaced. Use of a short 10mm box wrench will
reduce the risk of damaging these studs.
o. Inspect the ignition electrode and ame rod for deposits. Clean any found with steel wool. Do not use sand paper
or Emory cloth for this cleaning. Inspect the ceramic portion of both of these parts for cracks and replace if any are
found. Verify that the ignition electrode gap is within the range shown in Figure 13.2
p. Inspect the blower gas valve assembly, looking for dust, lint, or other debris that may have been drawn into this
assembly. Excessive deposits may be vacuumed out.
The blower/gas valve assembly used on the 150MBH and 180MBH may be disassembled to expose the
“swirl plate” (Figure 13.4). If it is necessary to clean the swirl plate, carefully note the orientation of all parts during
disassembly and use care not to damage the swirl plate vanes. The venturi assembly used on the 80, 100, and 120
cannot be removed from the blower.
Inspect all rubber and plastic components on the blower/gas valve assembly, looking for deterioration. Replace
blower and/or gas valve if deterioration is found.
q. Inspect and clean the condensate trap. Place a bucket under the condensate cleanout cap on the bottom of the
boiler (Figure 2.1) to catch water in the trap as well as the ball and ball support. Unscrew the cap, being careful
   nottolosetheballorballsupport.Flushanydebrisfoundinthetrapwithwater–donotuseothercleaningagents.
Reassemble the trap as shown in Figure 13.3.
r. Reinstall the re door/blower/gas valve assembly, following the above steps in reverse order.
s. Inspect the vent system to verify that:
   • Allgasketsandjointsbetweentheboilerheatexchangerandterminalareleaktight.
   • Allsupportsareintactandventsystemisproperlypitched
   • Allpipeisingoodcondition.Lookfordamagesuchascracks,heatdistortion,discoloration,andembrittlement.
    Ifanysuchdamageisfound,thepipemustbereplacedandthecauseofthedamageidentied.
   • Vent/Intaketerminalsareingoodcondition,freefromblockages,andstillcorrectlylocatedrelativetodoors,
windows, decks, etc.
   • Thereisnogasoline,ammableliquids/vapors,orhalogenbasedproductsstoredinthevicinityofthe 
vent or inlet terminals. Also verify that there are no chemical products containing chlorine, chloride based salts,
    chlorouorocarbons,paintremovers,cleaningsolvents,ordetergentsstoredneartheairintaketerminal.
Refer to Part VII (Venting) to re-assemble any vent system components that are disassembled during this
inspection. Also refer to Part VII for details on supporting, pitching, and terminating the vent system.