- Instruction Manual Residential Gas Water Heater

20
INSTALLATION OF VENT SYSTEM
Beforebeginninginstallationofpipingsystemthoroughlyread
the section of this manual VENT PIPE PREPARATION.
If you are installing your system so that it vents through roof,
please refer to section  titled INSTALLATION OF VERTICAL
VENT SYSTEM.
VENT TERMINAL INSTALLATION, SIDEWALL
1. Installtheventterminalbyusingthecoverplateasatemplate
tomarktheholefortheventpipetopassthroughthewall.
BEWARE OF CONCEALED WIRING AND PIPING INSIDE
THE WALL.
2. If the Vent Terminal is being installed on the outside of a
finishedwall, itmaybeeasier tomark boththeinsideand
outsidewall.Aligntheholesbydrillingaholethroughthe
centerofthetemplatefromtheinsidethroughtotheoutside.
Thetemplatecannowbepositionedontheoutsidewallusing
thedrilledholeasacenteringpointforthetemplate.
3. A)MASONRYSIDEWALLS
 Chiselanopeningapproximatelyonehalfinch(1.3cm)larger
thanthemarkedcircle.
 B)WOODENSIDEWALLS
 Drillapilotholeapproximatelyonequarterinch(0.64cm)outside
ofthemarkedcircle.Thispilotholeisusedasastartingpoint
for a saws-all or sabre saw blade. Cut around the marked
circlestayingapproximatelyonequarterinch(0.64cm)outside
ofthe line. (This will allowthe ventto easilyslide through
the opening. The resulting gap will be covered up by the
VentTerminalcoverplate.)Repeatthissteponinsidewallif
necessary.
SEQUENCE OF INSTALLATIONS, FIGURE 18A
CutalengthofPVCpipeabout3.5inches(8.9cm)longerthanthe
wall thickness at the opening.  Glue the vent terminal to this
sectionofpipe.Slidethewallplateoverthepipetostopagainst
theventterminal.Placeabeadofcaulking(notsupplied)around
thegap between the pipe andcover plate.Apply enough to
fillsomeofthegapbetweenthepipeandwall.Placesomeof
thecaulkingonthebackoftheplatetoholditagainstthewall
afterinstallation.Iftheventpipeisinstalleduptothewall,with
acouplingontheendagainstthewallopening,thepipewith
thevent terminal can be prepared for gluingbefore inserting
through the wall.  Slide the pipe through the wall and insert
intothecouplingontheothersideofthewall,makingsurethat
theventterminal endsup pointedin the correctposition,see
Figure18A.
VENT TERMINATION - FIGURE 18A.
DIRECT VENTING
Theairintakeprovidedontheunitcontainsameshscreentoprevent
largeparticlesfromenteringtheunit.
FIGURE 18B.
WHEN THE UNIT IS TO BE SETUP AS A DIRECT VENT, THE
MESH SCREEN MUST BE REMOVED. THE INLET VENT PIPE
MAYTHENBEGLUEDTOTHEAIRINTAKE(SeeFigure18B)
PROVIDED ON THE UNIT. THE SCREEN REMOVED FROM THE
INTAKENEEDSTOBEINSERTEDINTOTHE2”-22.5DEGREE
VENT TERMINAL SUPPLIED IN THE VENT TERMINAL KIT.
DIRECT VENT TERMINAL INSTALLATION IMPORTANT
THIS UNIT CONSISTS OF TWO VENT TERMINALS - AN INTAKE
VENT TERMINAL AND AN EXHAUST VENT TERMINAL. THE INTAKE
VENTTERMINALISA2”22.5°PVCELBOW(-)WITHAMESHWIRE
SCREENANDTHEEXHAUSTVENTTERMINALISA2”22.5°PVC
ELBOW WITH A MESH WIRE SCREEN.
NOTE: TO PREVENT EXHAUSTING PRODUCTS FROM
CIRCULATING TO THE AIR INTAKE IN WINDY/COLD AREAS,
THE MAXIMUM PRACTICAL DISTANCE BETWEEN THESE TWO
TERMINALS IS RECOMMENDED.
FIGURE 18C.
WHEN LOCATING THE TERMINALS ON A SIDEWALL, THE
FOLLOWING SPECIFICATIONS PERTAINING TO TERMINAL
LOCATION MUST BE FOLLOWED.
1.Theintakeairterminalandtheexhaustventterminalmustterminate
onthesameexteriorwallandmustbeseparatedbyaminimumof
24”(61cm)onverticalcenterline(seeFigure18C).Incolderclimates
increasing the 24” (61cm) minimum will reduce possibility offrost
overfromsidewindsblowingexhaustvaporstotheairintakeofthe
direct vent.
2.Thehorizontalcenterlineoftheintakeairterminalmaynotbelocated
lowerthanthehorizontalcenterlineoftheexhaustventterminal(see
Figure18C).