Installing$the$water$heater:
Water$Supply$Connections,$continued
Notice:'If'the'water'flow'resistance'of'a'
shower'head'is'too'high,'the'burner'in'the'
water'heater'will'fail'to'ignite.'Keep'the'
shower'head'clean'from'debris'that'could'
cause'additional'pressure'drop.
Notice:'If'using'mixing'valves'on'the'
outlet,'choose'one'that'prevents'cold'
water'pressure'from'overcoming'hot'water'
line'pressure.
Notice:$If$multiple$water$heaters$are$
installed$in$a$manifold$system,$the$
water$piping$must$be$in$“Parallel”.$A$
water$pressure$of$40$psi$(276$kPa)$is$
recommended$for$each$water$heater$for$
proper$operation$of$the$water$heaters.
Alternate$Water$Piping$Arrangement$
with$Optional$Valve$Kit
Valve'kits'may'be'purchased'and'installed'as'
optional'items.'Contact'your'distributor'or'
place'of'purchase'for'details.They'allow'for'
one'person'full'diagnostic'testing'and'ease'
of'flushing'the'system.'The'kit'includes'two'
full'port'isolation'valves,'one'for'the'cold'
side'and'one'for'the'hot'side.'Refer'to''
page'22.
Install'a'shutoff'valve'near'the'inlet'of'
the'water'heater'for'service'and'draining'
purposes.
It'is'not'recommended'to'use'pipes'with'
smaller'diameters'than'the'water'supply'
connection'of'the'water'heater.
Before'connecting'the'water'supply'pipe'
to'the'water'heater,'open'the'shutoff'valve'
and'clean'out'sand,'debris,'air,'caulking'
material,'etc.'inside'the'pipe.'Connect'to'
the'water'inlet,'then'check'water'flow.'
Close'the'shutoff'valve'and'clean'the'
water'filter.
Be'sure'to'connect'the'water'inlet'and'the'
hot'water'outlet'as'shown'on'the'water'
heater.'If'reversed,'the'water'heater'will'
not'function.
Installation'of'unions'or'flexible'copper'
connections'are'recommended'on'the'
HOT'and'COLD'water'lines,'so'that'the'
water'heater'may'disconnect'easily'for'
servicing,'if'necessary.
It'is'recommended'to'install'a'Check'
Valve'between'the'water'heater'and'the'
water'shutoff'valve,'if'either'a'thermal'
expansion'tank'or'a'backflow'prevention'
device'is'not'installed.
The'following'should'be'addressed'in'
regards'to'the'HOT'WATER'OUTLET:
●$$Connections'between'the'water'heater'
and'point(s)'of'use'should'be'as'short'
and'direct'as'possible.
●$$Local'codes'shall'govern'the'exact'type'
of'pipe'material'to'be'used'for'water'
connections.
●$$To'conserve'energy'and'minimize'heat'
loss,'insulation'of'hot'water'piping'is'
recommended'(see'Hot'and'Cold'Pipe'
Insulation'Installation'on'page'23).
Notice:'The'flow'rate'of'hot'water'
may'vary'when'more'than'two'faucets'
(appliances,'fixtures,'etc.)'are'being'used'
simultaneously.
Notice:'The'pipes'MUST'be'completely'
drainable.'If'the'hot'water'faucets'are'
located'at'a'point'higher'than'the'water'
heater,'place'a'drain'valve'at'the'lowest'
point'(see'diagram'at'the'left).
Water Filter
Check Valve
Water Inlet
Clean the
Water Filter
Water
Nipple
Air
Relief
Valve
Hot
Water
Tap
Drain Valve
CAUTION:$This$water$
heater$must$only$be$used$with$
the$following$water$supply$
system$conditions:
●$$With$clean,$potable$water$
free$of$corrosive$chemicals,$
sand,$dirt$or$other$
contaminates.
●$$With$inlet$water$
temperatures$above$32°F$
(0°C),$but$not$exceeding$
120°F$(49°C).
●$$With$recommended$water$
quality$(see$chart$bellow).
●$$DO$NOT$reverse$the$hot$
and$cold$water$connections.$
The$water$heater$will$$
not$operate.
Notice:$Use$only$teflon$tape$on$
cold$and$hot$water$connections$and$
lines.
16
This$appliance$is$not$
intended$for$space$heating$
application.$$Do$not$$
connect$this$heater$to$
waterlines$previously$$
used$for$space$heating$$
or$non`potable$water$
distribution.$All$water$
piping$and$components$$
shall$be$suitable$for$$
potable$water.
pH TDS (Total
Dissolved Solids)
Free Carbon
Dioxide (CO2)
Total
Hardness Aluminum Chlorides Copper Iron Manganese Zinc
6.5 to 8.5 Up to 500 mg/L Up to 15mg/L
Up to 200
mg/L
Up to 0.2
mg/L
Up to 200
mg/L
Up to 1.0
mg/L
Up to 0.3
mg/L
Up to 0.05
mg/L
Up to 1.0
mg/L
Chart'for'Recommended'Water'Quality'Levels
AP15317 (10_09) DV Gas Manual 10 30 09.indd 16 11/9/2009 3:10:28 PM