The$water$heater$must$be$installed$with$a$3”/5”$diameter$UL$approved$Category$III$Concentric$ Stainless$
Steel$appliance$concentric$vent$pipe$or$Rheem$approved$concentric$vent$pipe.
Venting
The'installation'of'venting'must'comply''
with'national'codes,'local'codes'and'the''
vent'manufacturer’s'instructions.
The'water'heater'must'be'vented'to'the'
outdoors'as'described'in'these'instructions.'
DO$NOT'connect'this'water'heater'to'a'
chimney.'It'must'be'vented'separately'from'
all'other'appliances.
All'concentric'vent'components'(adapters,'
pipe,'elbows,'terminals,'etc.)'should'be'
Rheem'approved'Stainless'Steel'Venting'
Material''
(e.g.'AL29E4C).
The'specified'vent'termination'must'be'used.''
(Refer'to'pages'13'and'14'for'an'example'of'
the'concentric'vent.)
Use'the'screws'provided'to'connect'
the'concentric'vent'pipe'with'the'antiE
disconnection'joint.
The'unit'can'be'vented'either'horizontally''
or'vertically.
Concentric'vent'pipe'runs'must'be'
adequately'supported'along'both'horizontal'
and'vertical'runs.
The'maximum'recommended'unsupported'
span'should'be'no'more'than'five'(5)'feet'
(1.5'm).'Support'isolation'hanging'bands'
should'be'used.'DO$NOT'use'wire.'(See'
diagram)
Notes$on$pre`existing$vent:
If'the'water'heater'is'being'installed'as'a'
replacement'for'an'existing'water'heater,'a'
thorough'inspection'of'the'existing'venting'
and'air'intake'system'must'be'performed'
prior'to'any'installation'work.'Verify'that'the'
correct'materials,'vent'lengths'and'terminal'
locations'as'detailed'in'this'Use'and'Care'
Manual'have'been'met.'Carefully'inspect'the'
entire'venting'and'air'intake'system'for'any'
signs'of'cracks'or'fractures,'particularly'at'
the'joints'between'elbows'or'other'fittings'
and'the'straight'runs'of'vent'pipe.'Check'the'
system'for'signs'of'sagging'or'other'stresses'
in'the'joints'as'a'result'of'misalignment'of'
any'components'in'the'system.'If'any'of'
these conditions'are'found,'they'must'be'
corrected'in'accordance'with'the'venting'
instructions'in'this'manual'before'completing'
the'installation'and'putting'the'water'heater'
into'service.
See(the(back(page(of(this(manual(
for(additional(requirements(for(the(
Commonwealth(of(Massachusetts.
DANGER:$Failure$to$
install$the$appliance$vent$
adapter$and$properly$vent$the$
water$heater$to$the$outdoors$
as$outlined$in$the$Venting$
section$of$this$manual$will$
result$in$unsafe$operation$of$
the$water$heater,$causing$death,$
serious$injury,$explosion,$$
or$fire.$To$avoid$the$risk$$
of$fire,$explosion,$or$
asphyxiation$from$carbon$
monoxide,$NEVER$operate$the$
water$heater$unless$it$is$
properly$vented$and$has$
adequate$air$supply$for$proper$
operation$as$outlined$in$the$
Venting$section$of$this$manual.
WARNING:$Use$only$3”/5”$
UL$approved$Category$III$
Concentric$Stainless$Steel$vent$
material$or$Rheem$approved$
concentric$vent$material.$No$
other$vent$material$is$
permitted.
WARNING:$Follow$
concentric$vent$
manufacturer’s$installation$
instructions$and$their$
recommended$clearances$to$
combustibles.
NO! YES!
Venting$Lengths
MAXIMUM$VENT$LENGTH:'
The'system'will'not'operate'if'there'is'
excessive'restriction'(pressure'drop)'in'the'
venting'system.'A'maximum '39’
(12.0'm)'
of'
vent'pipe'may'be'used'provided'there'is'only'
one'90°'elbow'in'the'system.'If'additional'
elbows'are'required:'two'elbows'can'be'used'
with'37’'6"
(11.5'm)
,'three'elbows'can'be'used'
with'
36’'
'
(11.0'm)
'or'four'elbows'can'be'used'
with'34
’'6"
'(10.5'm)'of'vent'pipe.'(See'table)
A'94°'elbow'is'equivalent'to'1’6”'(.5'm)'of'
straight'pipe.'A'45°'elbow'is'equivalent'to'
9”'(.25'm)'of'straight'pipe.
The'vent'termination'does'not'count'
in'equivalent'to'pipe'calculation'when'
determining'total'vent'lengths.'
The'vent'should'be'installed'with'a'slight'
downward'slope'of'1/4”'per'foot'of'
horizontal'run'toward'the'vent'terminal'(see'
diagram).'This'ensures'that'any'condensate'
formed'during'operation'of'the'unit'is'
evacuated'from'the'appliance'and'to'prevent'
rain'from'entering'the'appliance.
An'upward'slope'toward'the'vent'terminal'is'
not'acceptable'for'horizontal'venting'without'
installing'the'drain'tube'to'the'condensation'
trap.''For'horizontal'installation'with'less'
than'10’'(3.1m),'a'94°'elbow'is'required.'
MINIMUM$VENT$LENGTH:'The'venting'
may'be'as'short'as'12”'(30cm),'in'addition'
to'installation'of'one'94°'elbow'and'one'
vent'termination'to'the'outdoors'through'a'
side'wall'(Total'equivalent'vent'length:'30”'
(76cm)).
Notice:'Make'sure'that'the'seam'of'the'inner'
vent'pipe'in'horizontal'runs'is'toward'the'top'
of'the'installation'(see'diagram).
Vent Seam
Number'of'
90°'elbows'
(bends)
Maximum'
Length'of'
Straight'Pipe
1 39’
(12.0'm)
2 37''6"
(11.5'm)
3 36"
(11.0'm)
4 34''6"
(10.5'm)
5 33'
(10.0'm)
6 31'6"
(9.5'm)
9
AP15317 (10_09) DV Gas Manual 10 30 09.indd 9 11/9/2009 3:10:25 PM