A.O. Smith Boiler VB/VW- 1000 User Manual

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Any safety devices including low water cutoffs used in conjunction
withthisboilershouldreceiveperiodic (everysixmonths)
inspection to assure proper operation. A low water cutoff device of
theoattypeshouldbeushedeverysixmonths.Periodicchecks,
at least twice a year, should be made for water leaks.
More frequent inspections may be necessary depending on water
conditions.
The boiler-mounted gas and electrical controls have been
designed to give both dependable service and long life. However,
malfunction can occur, as with any piece of equipment. It
is therefore recommended that all components be checked
periodicallybyaqualiedserviceagentforproperoperation.
RELIEF VALVE
The safety relief valve should be opened at least twice a year
to check its working condition. This will aid in assuring proper
pressure relief protection. Lift the lever at the top of the valve
several times until the valve seats properly and operates freely.
COMBUSTION AIR FILTER
If the combustion air supply to the boiler contains dust, dirt, drywall
dustetc.altermustbeinstalled.Anairlterisnotsuppliedwith
the boiler as shipped from the factory. The installer must provide a
lteringsystemintheairinlettotheboilerifdust,dirtorconstruction
dirt can be pulled into the boiler through the inlet air piping.
Periodicallycleanairlterperthemanufacturer’sinstructions.
BLOWER COMPARTMENT
The blower compartment should be cleaned annually to remove
any dirt and lint that may have accumulated in the compartment
or on the blower and motor. Buildups of dirt and lint on the blower
and motor can create excessive loads on the motor resulting in
higher that normal operating temperatures and possible shortened
service life.
BURNER MAINTENANCE
Qualiedservicersshouldfollowthisprocedurewhentheboiler’s
burner needs cleaning.
1. Turn off the electrical power to the boiler and close the main
manualgasshutoffvalve(s).Allowtheboilerpartstocoolbefore
disassembly.
2. Loosentheangeandseparatethegastrainfromthemanifold
assembly.
3. Separatetheburnerfromthebloweradapterbyrstremoving
thefour(4)boltsandsubsequently,theblowergaskets.The
blower should be free to move at this point.
FOR DIRECT VENT UNITS: It is necessary to loosen and slide
the rubber coupling on the blower adaptor in order to move the
blower.
4. Loosen the seven bolts on the blower adapter at the base and
movetheburnergroundwire(Green)aside.
5. Lift the blower adapter and remove the manifold assembly up
from the 6 studs located on the cover plate and remove the
burner gasket.
6. Remove any loose foreign material such as dust or lint with
a vacuum. Check all ports for blockage. Dislodge any foreign
material causing blockage. Remove any soot or carbon deposits
with a rag making sure to remove any lint left on the burner by
vacuuming again.
7. Reverse the steps to reassemble the unit.
8. Restore electrical power and gas supply to the boiler.
• PuttheboilerbackinoperationbyfollowingtheLightingand
Operating instructions in this manual.
• Checkforgasleaksandproperboilerandventoperation.
CONDENSATE REMOVAL SYSTEM
Duetothehighlyefcientoperationofthisunit,condensateis
formed during operation and must be removed by the conden-
sate drain systems. Inspect the condensate drains and tubes
atleastonceamonthandinsuretheywillallowthefreeowof
condensate at all times. The system must be inspected more
frequently in cold weather if the drain system is located in an
area,suchasalongtheoor,wherefreezingtemperaturesare
likely to occur. The conden sate drain system must be protected
againstfreezing.Contactaqualiedserviceagenttoinspect
and correct the condition if freezing of the conden sate lines is a
problem.Theunitisequippedwithablockedueswitchwhich
will shut the unit off if condensate is unable to drain and backs
upintheunit.Ablockedueerrorwillappearwhensufcient
condensate accumulates for this condition.
The transparent drain lines and condensate drain on the bottom
of the vent collector should be visually inspected at one month
intervals for blockage, particularly in the areas of the loops in the
lines which trap a small amount of conden sate, and the exit point
of the vent collector drain. Conden sate in portions of the line other
than the loop area indicates a blockage in the drain line. Flush the

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