Kenmore 229.960330 Owner's Manual page 25

Check thewater level every d ay ortwo. V erify t he water line shown by
operating thedrain valve onthegauge. BESURE TOP AND BOTTOM
VALVES ON GAUGE ARE A LWAYS OPEN SO THAT ACTUAL WATER LEVEL
WILL B E SHOWN AT ALL TIMES,
The gauge glass s hould bedryabove the water line. The water line should
notbounce more than about oneinch when t heboiler i s steaming. If
you see water droplets carrying over through thetop ofthegauge glass,
orexcessive bouncing ofthewater line, t he boiler needs
to be cleaned.
Followthe instructions under"Cleaning YourBoiler."
POP SAFETY VALVE
This valve should openautomatically whenthe steampressureexceeds
the safe limit (per instructionspackaged with valve).Shouldit ever fail
to open under these conditions, s hut downyour system.Havethe valve
replacedimmediately
LOW WATER CUT-OFF
The Low WaterCut-Offwill interruptthe electricalcurrentto the burner
whenthewaterline in the boilerdropsto a low level.
On float type low water cut-offs, it is very importantto keep the float
chamberfree from sediment,a conditionessenlialto dependability To
keepanyaccumulation f rom interfering withfloatactionis to "BLOWDOWN"
or flush out the control regularly. T his must be done two to threetimes
duringthe first weekafter installation and oncea weekthereafterduring
the heatingseason.Do it whilethe boiler is in operation. F irstnote water
level in gauge glass.Open blow-off valve at bottom of control; water
will pour out, flushing awaysediment.Drain until water is clear, about
a pailful, then close valve, g water level in gaugeglass has dropped,
addwaterto boilerto restorelevel.Consultlowwater cut-off manufacturer's
instructions includedwith boiler.
NOTE: Openingblow-off valve checks cut-off operationtoo. As float
drops with falling waterlevel, burnerswill shut off. After valve is closed
andnormaloperating conditions are restored,burnerswill resume firing.
Forprobe type Low WaterCut-Offs, c heckactionof the LowWaterCut-
Offmonthly to make sureit isprovidingtheproper protection. S ee"Checking
and Adjusting"on page 23. Low Water Cut-0ff remote probesmust be
removed for periodicinspectionand cleaning, p referablyat the beginning
of eachheating season.Morefrequentcleaning maybe required on boilers
requiringconstant o r very frequent a dditions of makeup water.
BURNERS
A visual check of the pilot and mainburner flamesshouldbe madeat
least once eachyear,preferablyat the beginningof the heatingseason.
Seepage23.
BOILER FLUE PASSAGES
Under norma]operatingconditions,with the burners properlyadjusted,
it shouldnot be necessary to cleantheboiler flue gaspassages. However,
to assuretrouble-freeoperation,we recommend that you havethe flue
passages, burner adjustment, and operation of the controlscheckedonce
eachyearby a competent S erviceTechnician.
Beforethestart of eachseason(or whenever s ystemhasbeenshut down
for some time) recheckthe wholesystemfor leaks ... and recheckthe
boilerandvent pipefor leaks.
VENT PIPE
Theventingof this unitis very importantandthepiping shouldbe checked
at least once a season.If the vent piping shows any sign of leaking,
replaceit immediately
CLEANING YOUR BOILER FLUE PASSAGES
AND BURNERS
FluePassages betweensectionsshouldbe examined yearlyandcleaned,
if necessary To clean,removeburners,pilot, and venl pipe,Remove top
and front jacketpanels.Remove thetwo screwsattaching the intermediate
front pand 1o lhe left and righl side jacket panels. Remove the draft
diverlerandintermediate f ront panelasa unit.Carefully remove thecerafeg
gasketstrips. Cleanpassageways betweensectionswith a flexiblehandle
wire brush.Remove dirt from botlomof boiler andfrom between seclions
by vacuuming, M akesure all flame ports in burnersare openand clear.
Shakeout or blow out all loose dirt in burners.Reseal s eamsbetween
adjacent s ections as necessary w ith400F RTV siliconesealant. R eassemble
all parts.Be sure to checktightnessof pilot connections and condftion
of burnerflamesafter reassemNy (seeFigures18 and 19). Be sure vent
pipeconnections to chimneyaresecureand no obslructions are present.
FOAMING, PRIMING OR SURGING
These terms are used to describea fluctuating waterline - whenwater
leaves theboiler withthesteam.
It is caused by anycombination of the following:
1. Threading oil and organicmatterin the boiler water,(Mineraloil, or
coresanddoesnot cause surging.) Followinstructions under"Cleaning
Your Boiler."
2. Faultyquick ventsthat do not releaseair unlil a sizeablepressure
is built up - if old style, reptace it dirty cleanso you can easily
blowthroughvalve.
3. Improperheaderdesign - when steam flowsin oppositedirection
of equalizerline on "HartfordLoop." Generally a 15" horizontalrun
betweenriser and main takeoffwill allow entrainedwaterto fall out
of the steam vapor so it can return to boiler. (See Figures5, 6A
& 6B on pages7,8 and9).
4. Adjustment of steamlimitcontroltoa widedifferential i ncreases d ifficulty
if quick ventsare old style, slow-releasing type or dirty Alwaysset
steamlimitcontrol differential as low aspossible.
5. Soapand detergents in the boiler watercauseextreme surging.Boiler
cleaners and chemical c leaning additivesare notrecommended. If used
andnot rinsedproperlytheywill de moreharmthangood.Thecleaning
procedureslaid out in these instructionswill clean out the typical
oilsandimpurities foundin newboilersandin residential heating systems.
Thebest thing for yourboiler and heatingsystemis cleanwaterwith
no additives.
CAUTION ]
Never refill a hot boiler with cold water - the danger
of thermal shock may crack a section.
BOILER WATER TREATMENT (Other Than Cleaners)
In steamsystemswhere the systemis tight, free from leaks,and all
the steamis returnedto the boiler as condensate, the amountof make
up wateris small,Water treatment i s generally notrequired.
In steamsystemswith less than 90% of the steam being returnedas
condensate, or wilh very hard or corrosivemakeup water,treatment m ay
bedesirable. F ollow therecommendations of'yourlocalboilerwater treatment
speciafisl.
BETWEEN HEATING SEASONS
Boilers shouldnotbe drained between heating seasons. Steam boilersshould
beentirety filledwithwaterduringthesummer m onths to exclude air.
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