Bosch AquaStar 125HX NG User manual

WARNING: Improper installation,
adjustment, alteration, service or maintenance can
causeinjuryorpropertydamage.Refertothismanual.
For assistance or additional information consult a
qualified installer, service agency or the gas supplier.
Uponcompletionoftheinstallation,theseinstructions
should be handed to the user of the appliance for
future reference.
In the Commonwealth of Massachusetts this product
must be installed by a licensed plumber.
FEATURING:Automatic Variable Power Modulating Gas
ValveandpowergeneratedElectronicIgnition
INSTALLATION AND OPERATING INSTRUCTIONS FOR AUTOMATIC
INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND
LIQUEFIED PETROLEUM GAS
MODEL 125HX LP and 125HX NG
(Flow Modulated with Electronic Ignition)
Suitable for heating potable water only
Not approved for space heating purposes
Intended for variable flow applications with steady cold water inlet temperatures.
WARNING
If the information in this manual is not followed
exactly, a fire or explosion may resultcausingproperty
damage, personal injury or death.
FOR YOUR SAFETY
Do not store or use gasoline or other flammable,
combustible or corrosive vapors and liquids in the
vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
-Do not try to light any appliance.
-Do not touch any electrical switch; do not use any
phone in your building.
-Immediatelycallyourgassupplierfromaneighbor’s
phone. Follow the gas supplier’s instructions.
-If you cannot reach your gas supplier, call the fire
department.
-Installation and service must be performed by a
qualifiedinstaller,serviceagencyorthegassupplier.
Specifications .................................................... Page 2
Rules for safe operation .................................... Page 4
Locating theHeater ............................................ Page 4
CombustionAirRequirements ............................ Page5
MountingtheHeater........................................... Page5
Ventingthe Heater ............................................. Page6
GasConnections ............................................... Page7
GasPiping ......................................................... Page8
WaterConnections ............................................ Page9
Safetybeforeturning on the heater..................... Page 9
Operatinginstructions ...................................... Page10
Settingwatertemperature ................................ Page10
Maintenance&Service......................................Page11
TroubleShooting ...............................................Page11
ElectricalDiagram............................................ Page 13
DiagramofAquaStar......................................... Page15
Interiorcomponentsdiagram ............................ Page16
Parts List ......................................................... Page17
TABLE OF CONTENTS
6 720 606 804 (02.10) AL

26 720 606 804 (02.10)
Principle of Operation:
Whenahotwater faucet is opened,thewater flow through
the heater causes the gas valve to open. At the same
time the hydro-generator activates the electronics which
sends a spark to the pilot. The flame sensor confirms the
pilot has been lighted and allows the first two burners to
comeon.Theflamesensorconfirmscorrectactivationand
allburners comeon.Thepilotgoes off.Theheatexchanger
coilsabsorb the heatgeneratedbytheburnersand transfer
heattothewater.When the hot water faucetisshutoff,the
gas valve automatically closes and the burners turn off.
Yourhotwater faucet is an ignition key to activate the water
heater,giving you control over yourhot water energyuse.
Every time you turn off your hot water faucet, the energy
consumptionof your hot water returns to zero.
FEATURES
- ElectronicPilotIgnitiondriven by hydro-generator
- HighQuality Materials forLong Working Life.
- Copper heating coils for endless supply of hot water.
- Burneroutputproportional to hot waterflowdemand for
maximumenergy efficiency.
- Safetyflame sensor atpilot burner.
- Automaticoverheatingprotectionshut-offsensor.
- Fluegas safety device.
- Stainless steel burners with stabilized blue flame.
- Built-incorrosionresistantdraftdiverter.
- Compactspacesaver:mountsonawallwithtwohooks.
- Easilyremovable one-piece cover.
- Easy one person installation.
- Adjustablewaterflowrestrictortoensurethatwaterflow
demand will not exceed the heating capacity of the
heater.
- On/Off Switch to activate system.
- RedLED indicator flasheswith low water pressure.
- GreenLEDindicatormainburner operation.
BOSCH is constantly improving our products, therefore
specifications are subject to change without prior notice.
AquaStar 125HX LP and 125HX NG Specifications
GasInput max.: 117,000 Btu/hr
min.: 28,000 Btu/hr
WaterConnection ½” Thread fitting NPT
H x W x D 29 3/4” x 18 1/4” x 8 3/4"
Vent 5”
CATEGORYI GASAPPLIANCE
GasConnection1/2”NPT thread
Min. Water Pressure 18 Psi at 4 GPM
Max. Water Pressure 150 Psi
Shipping Weight 43 LB
Net Weight 40 LB
1.8 GPM at 90°rise
3.7 GPM at 45°rise
Min. Water Flow 1/2 gal/min
LP GAS Supply Pressure
(beforeAquastarregulator) min. 11” W.C.
max. 14”W.C.*
Required LP GAS Pressure at inlet
tapwhileAquastaris operating: 10.5” W.C.
LPGAS Burner Manifold pressure whileAquastaris
operating atmaximum input: 9.0” W.C.
NaturalGas Supply Pressure min.: 7” W.C.
(beforeAquastarregulator) max.: 14” W.C.*
RequiredNatural Gas Pressure atinlet
tap whileAquastaris operating: 5.7” W.C.
NaturalGas Burner Manifold PressurewhileAquastaris
operating atmaximum input: 4.2” W.C.
* Inlet gas pressure before Aquastar regulator must not
exceed this value. Pressure may need to be adjusted for
high altitudes, see page 7.
UNPACKING THE AQUASTAR HEATER
Thisheater is packedsecurely.Thebox includes onewater connection fitting,a control knob,a gas pressureregulator,
apressure relief valve,an incandescent particletray, twohooks for hangingthe heater,this manual, apersonal letter, a
warrantystatement and a warrantyregistration card. Do not lose this manual, as there is a charge for replacement.
Pleasecomplete and returnthe enclosed warranty registrationcard.

36 720 606 804 (02.10)
MINIMUM INSTALLATION CLEARANCES FROM COMBUSTIBLEAND NON
COMBUSTIBLE MATERIALS FOR ALCOVE OR CLOSET INSTALLATIONS
FRONT VIEW SIDE VIEW
AQUASTAR MODEL 125HX
MODEL 125 HX
TOP (A) 12"
FRONT (B) 4"
BACK 0"
SIDES 4"
FLOOR (C) 12" *
VENT DIAMETER 5"
* Some local codes require 18” in garage installations

46 720 606 804 (02.10)
GENERAL RULES TO FOLLOW
FOR SAFE OPERATION
1. You should follow these instructions when you install
your heater. In the United States: The installation must
conformwithlocal codes or,in the absence oflocalcodes,
theNational Fuel Gas CodeANSIZ223.1/NFPA54.
In Canada: The Installation should conform with CGA
B149.(1,2)INSTALLATIONCODESand/orlocalinstallation
codes.
2. Carefully plan where you install the heater. Correct
combustion air supply and flue pipe installation are very
important. If not installed correctly, fatal accidents can be
caused by lack of air, carbon monoxide poisoning or fire.
3. Theplacewhereyouinstalltheheatermusthaveenough
ventilation.The National Fire Codesdo not allow gasfired
water heater installation in bathrooms, bedrooms or any
occupiedroomsnormallykeptclosed.Seethesectionbelow
onlocating the heater.
4. You must vent your heater. See section on VENTING,
Page6.
5. Theappliancemustbedisconnectedfromthegassupply
piping system during any pressure testing at pressures in
excess of 1/2 Psig (3.5 kPa).
Theappliancemustbe isolated from thegassupplypiping
systemby closing its individual manual shutoffvalveduring
any pressure testing of the gas supply piping system at
test pressures equal to or more than 1/2 Psig (3.5Kpa).
Theappliance and itsgas connection must be leaktested
beforeplacingthe appliance in operation.
6. Keepwaterheaterareaclearandfreefromcombustibles
and flammable liquids. Do not locate the heater over any
materialwhich might burn.
7. Correct gas pressure is critical for the optimum
operationof this heater (see specifications on page2).Gas
piping must be sized to provide the required pressure at
the maximum output of the heater, while all the other gas
appliances are in operation. Check with your local gas
supplier,andseethesectiononconnectingthegassupply.
8. Shouldoverheating occur orthe gas supplyfail to shut
off,turnoff the gassupplyat the manual gasshut off valve
on the gas line.
9. Do not use this appliance if any part has been
underwater. Immediately callaqualifiedservicetechnician
to inspect the appliance and to replace any part of the
control system and any gas control which has been
underwater.
PROPER LOCATION FOR INSTALLING
YOUR HEATER
Carefully select the location of your new heater. For your
safetyand forproperheateroperation,you must providean
abundantsupplyof combustion air anda proper venting.
Fig. 0 - Water heater drain plug
Theheater may still operate even when improperly vented.
Itwill,however,belessefficientandcouldeventuallydamage
theheater. It could evenresultin human sickness ordeath
dueto oxygendeprivationandcarbonmonoxide poisoning.
Followtheguidelines below:
1. Place your heater as close to a vent or chimney as
possible.
2. National building codes require that you do not install
this appliance in bathrooms, bedrooms or any occupied
rooms normally kept closed.
3. Simultaneous operation of other appliances such as
exhaustfans, ventilation systems clothes dryers,fireplaces
orwoodstoves couldcreateavacuumeffectinyourhome
which could cause dangerous combustion by-products to
spillbackintoyour home rather than ventingtotheoutside
through the flue. Confirm that your Aquastar is venting
properlywhenall these otherappliances are running. See
sectiononventing.
Donot obstruct the flow of combustion and ventilation
air to the appliance. If installed near a clothes dryer it is
veryimportantthatthe dryer be properlyvented. Failure to
properlyvent a dryer couldresultinagradualaccumulation
oflintonthewaterheaterfincoilsandburners, leading to a
dangerous condition of vent blockage and poor unsafe
combustion.
4. Yourhotwaterlinesshouldbekept shorttosaveenergy.
It is always best to have hot water lines insulated.
WARNING: The water in this water heater is cold
and always remains cold except for the times that hot
water is being used DO NOT INSTALL IN AN AREA
WHEREIT COULDFREEZE.
This heater is neither designed for nor approved for
outside installation.
Drain the heater entirely if freezing temperatures are
anticipated in area where heater is installed by
disconnecting both the inlet and outlet water
connectionsfrom the heater (disconnect the outletflex
line from where it connects to the copper heat
exchanger). Additionally remove the drain plug under
the water valve. See Fig. 0.
WARNING: Flammable materials, gasoline,
pressurized containers, or any other items or articles
that are potentially fire hazards must NOT be placed
on or adjacent to the heater. The appliance area must
be kept free of all combustible materials, gasoline
and other flammable vapors and liquids.

56 720 606 804 (02.10)
Louvers, grills and screens have a blocking effect. If the
effectivefreearea is notknown,increase the sizesofyour
openings by 75% if your louvers are wood and by 30% if
yourlouversaremetal.RefertotheNationalFuelGasCode
forcomplete information. In buildings of tight construction
all air should be taken from outside.
CLEARANCES
TheAquastar125HXisdesigncertifiedforinstallationon a
combustible wall and for installation in an alcove or closet
with the minimum clearances to combustible and non -
combustibleconstruction listed below
A. Top 12inches (306 mm)
B. Front 4 inches (102 mm)
C. Back 0 inches
D. Sides 4 inch (102mm)
E. Bottom 12 inches (306 mm)
Clearancefromventisdependentupontheclearancerating
oftheventing material used. For example:typeB-1 vent is
approvedfor1inchclearance.
Note: Minimumclearancetocombustiblematerialsshould
not be less than 6" for single wall flue pipe. Note that this
clearance can be reduced if combustible material are
protectedaspertableVIoftheNationalfuelGasCodeorif
Type B gas vent is used.
MOUNTING INSTALLATION
TheAquastar125 HX isdesign certified formounting on a
wall.
SecurethetwoLshapedhooksprovidedwiththeheaterto
a wall surface. Place them 13 ¼ inches apart as shown in
Fig1.
Donotinstallthisapplianceonacarpetedwalloroverfloor
coveringwhichis combustible, such ascarpet.Theheater
must be mounted on a wall using appropriate anchoring
materials.Ifwall is a studwallsheathed with plasterboard,
it is recommended that support board(s), either 1x4’s
or 1/2" (minimum) plywood first be attached across a
pair of studs and then the heater should be attached
to the support boards. See Fig 1.
Expansionandcontractionofpipingduetochangingwater
temperature in the pipes imparts movement to the heater
which, if mounted directly to a brittle, friable board, such
asplasterboard, can cause failureof mounting.
In earthquake-prone zones, CEC recommends that
installers use a large washer and lag screw through the
existing holes used to hang the heater to affix the upper
thirdofthe heater to themountingboard.Toaffixthe lower
third of the heater, CEC recommends that two new holes
bedrilled in theheater’s frame, eachone 16 inchesbelow
the top two holes, and that washers and lag screws be
usedtosecure the lowerportionof the heatertoa spacing
board.
Before installing the unit, be certain you have the
correctheater for yourtype of Gas– Propane orNatural
Gas. Identification labels are found on the shipping
box, and on the rating plate which is located on the
right side panel of the cover.Also,each burner orificeis
stamped with a number (79 for LPG and 120 for Natural
Gas).
Thisproduct is not approved for manufactured homes
(mobile home), recreational vehicles (RV) or boats.
Reference ANSI Z21.10.3.
This product is neither designed or approved for
outside installations.
COMBUSTION AIR REQUIREMENTS
TheAquaStar water heater holds cold water in its copper
heatexchanger and water valve when not in use. Because
of this, any cold air that comes in through the unit’s vent
pipe is capable of freezing these components. This
InstallationManual specifiestheminimumvertical ventpipe
and the amount of combustion air required for this unit.
Thevent pipe must not be restricted and its 6footminimum
height(provided there are noelbows)mustterminate2feet
aboveany obstruction withina 10 footradius.
When all requirements are followed, the unit will operate
properly and safely. However, there may still be a risk of
freezingduetonegativedraftifallthecombustionappliances
inthe area arenot being suppliedwith a sufficientamount
ofmake-upair.Awood stove orfurnacecanrob the make-
upairintheAquaStar’sventpipe,leavingthecoldinfiltrating
aircapable of freezingthe cold waterin theAquaStarheat
exchanger. More make up air is the solution. Follow the
instructionsonventingandcheckingadequacyofmakeup
air. AHVAC specialist should be used to design solutions
forprovidingmoremake-up air if necessary.
Observethefollowinginstructions concerning combustion
air.
Applianceslocated in unconfinedspaces:
a) An unconfined space is one whose volume is greater
than50 cubicfeetper1000Btu per hourofthecombined
ratingofallappliancesinstalledinthe space.That would
be5850cubic feet for theAquaStar125HX alone.
b) Inunconfined spaces in buildings of conventional frame,
masonry, or metal construction, infiltration is normally
adequateto provide air forcombustion, ventilation, and
dilutionof flue gasses.
Applianceslocated inconfined spaces:
Theconfinedspace must be providedwithtwo permanent
openings,onecommencingwithin12inchesofthetopand
one commencing within 12 inches of the bottom of the
enclosure.Each openingmust have a minimum free area
ofone square inchper:
- 1000 Btu/hr if all air is taken from inside the building.
- 2000Btu/hr ifallairis takenfromtheoutsideby horizontal
ducts.
- 4000 Btu/hr if all air is taken from the outside by direct
openingsor vertical ducts.
Ortheconfinedspacemustbeprovidedwithonepermanent
openingorduct that iswithin12 inches of theceiling of the
enclosure.This opening must have a minimum free area of
onesquare inch per:
- 3000 Btu/hr if all air is taken from the outside by a direct
openingorvertical duct.

66 720 606 804 (02.10)
Fig. 2 - Incandescent Particle Tray Illustration
atleast1/4inch for every foot ofitshorizontallength.Keep
thehorizontal section short and avoid too manyelbows.
To check the draft:
Close all doors and windows to the outside.
Turn on all appliances that force air out of the building.
Theseincludeallexhaust/ventilationfans, furnaces,clothes
dryers,wood burning stoves,etc.
Open all doors between the AquaStar and these other
appliances.
With the control knob set fully clockwise and strong hot
water flow rate, run the unit for at least 10 minutes. The
125HX is equipped with a Flue Gas Sensor; it’s mounted
ontheright side of thedraft diverter (Flue GasSensor#34
on page 17). If the main burners shut off during this test it
isbecause the FlueGas Sensor has detected inadequate
venting. This is a serious health hazard and must be
corrected. Poorventing canresultinsootbuilding up inside
the heater, overheating of the heater and freezing of the
heat exchanger in a freezing environment, which is all a
resultofnegativeairflow. Additional combustion air and/or
improvedventing will benecessary to correctthis.
WARNING
Note: Theburnersofaninstantaneous“ondemand”water
heater such as the AquaStar are only on at the time that
hotwater is actuallybeing used, the vent pipeis therefore
coldexceptfor the short durations whenhotwater is being
used,itis therefore very importantthat the venting and air
supply be adequate to provide a good positive draft as
soon as the burners turn on. See venting guide on back
page.
TheAquaStar125HXinstantaneouswaterheatershavebuilt-
in draft diverters and are designed for indoor installation
only.The draftdiverteroutletmust be connected to a clear,
unobstructedvent of thesame size, orlarger.
InCanada,CAN/CGA-B149InstallationCodefordetailed
requirements
In U.S.A., ANSI Z223.1 - NFPA 54, National Fuel Gas
Codefordetailedrequirements.
The vent connection for theAquaStar 125HX is 5 inches.
However,inCANADA,forinstallationsathighaltitude(2000-
4500 feet above sea level) a six inch vent is required.A5"
by 6" vent adaptor must be affixed to the vent collar of the
AquaStar with at least two screws. See figure 3.
WARNING:FailureTOINCREASETHEVENTSIZE
TOSIX INCHESAND/orassurethatthemanifoldpressure
issettopropervaluelistedforapplicationsathighaltitudes
willcause unsafe venting, asphyxiation,and will void CSA
Certification.
Theincandescentparticletray(shippedlooseinthecarton
with the water heater) must be attached at the bottom of
thewater heater frontcover at the timeof installation. Use
thescrewsprovided.Seefigure2
VENTING
Vent pipe connection.WARNING: Do not reduce
the vent pipe size.
This appliance must be vented to the outside following all
local ordinances and specifications for installing a gas
appliance vent or chimney. The venting system must be
designedand constructed so asto develop apositive flow
adequateto remove flue gassestotheoutdoors.Minimum
vent size must be 5". Minimum vent height must be 6
feet, provided there are no elbows. Termination of
the vent must be 2 feet above any obstruction within
a 10 foot radius of the vent pipe. Consult your gas
utility or National Gas Fuel Code if vent will have
elbows or share venting with another appliance. The
vent connector should have as much vertical rise as
possible (minimum 12”) before any horizontal run.
Optional powervent (Model AQ-1) is available in order to
sidewallvent.In the Commonwealth of Massachusetts:
Powervented applications must utilize proof-of-draft
safety interlock device. Contact your local dealer. The
appliance must be located as close as practicable to a
chimney or vent. The vent pipe sections must be secured
to each other with sheet metal screws. Keep in mind the
minimumclearance from thetopofyourheater. Remember
also that single wall vent pipe connectors require a 6 inch
clearance from combustibles. National Fuel Gas Code
specifies double wall — Type “B” — vent pipe be used in
coldclimatesand for gasventsrunning through attics. We
consider double wall vent pipe preferable in all
circumstances.Any vent section greater than 45 degrees
fromverticalis considered horizontal.
Horizontalsections of vent connectorsmustslopeupwards
Fig. 1 - Mounting the Heater
WALL STUDS
1” X 4”
SPACE BOARD
13 ¼”
SUPPORTBOARD
SCREWS
INCANDESCENT PARTICLE TRAY
Fig. 3 - Vent Adaptor for High Altitude Canadian
Installations
5”X 6”ADAPTOR
USEDONHIGHALTITUDE

76 720 606 804 (02.10)
GAS CONNECTIONS and Gas Regulator
NOTE: The Aquastar 125 HX is supplied with a gas
pressureregulatorthatmustbeinstalledontheheater
before attaching the gas supply line. See figure 4.
Failure to install the gas regulator as shown in figure
4 will be a violation of CSA certification of the unit.
The regulator supplied with the heater is preset for
the gas shown on the rating plate to the correct
pressure. It is an appliance level regulator designed
for (low inlet) pressure (less than 1/2 Psig or 15” W.C.)
DO NOT connect to an unregulated or high pressure
propane line or to a high pressure commercial natural
gas line.
GAS LINE SIZING
-It is strongly recommended that the Natural Gas pipe
be Black Iron pipe the entire distance from the outside
meter to the inlet of theAquastar regulator. 1/2” Black
Iron pipe up to 10 feet, 3/4” Black Iron pipe up to 40
feet and 1” Black Iron pipe up to 150 feet distances.
Flex line tubing is NOT recommended, but if used
then oversize it.
-It is strongly recommended that the LP Gas pipe be
semi-rigid copper or Black Iron pipe from the outside
regulator to the inlet of the Aquastar regulator. For
semi-rigid copper piping: 5/8” up to 20 feet and 3/4”
up to 60 feet distances. For Black Iron piping: 1/2” up
to 45 feet and 3/4” up to 160 feet distances. Flex line
tubingis NOT recommended, but if used then oversize
it.
THESEFIGURESARE FORAQUASTARSUPPLYONLY,
ALLOTHERAPPLIANCESINTHEBUILDINGWILLNEED
TO BE INCLUDED IN THE PIPE SIZING.
NationalFuelGasCoderequiresthatasediment trap (drip
leg) be installed on gas appliances not so equipped. The
drip leg must be accessible and not subject to freezing
conditions.Install inaccordancewiththerecommendations
oftheserving gas supplier.
WARNING:The heater must bedisconnected from
the gas supply piping system during any pressure testing
of that system at test pressures in excess of 0.5 psig.
The water heater must be isolated from the gas supply
piping system by closing the manual shutoff valve during
any pressure testing of the gas supply piping system at
test pressures equal to or more than 0.5 psig.
Thewater heater,includingthepressureregulatorprovided
with it, must not be operated at gas supply pressures in
excess of 0.5 psig. If overpressure has occurred, such as
throughimproper testing ofthe gas linesor malfunction of
the supply system, the gas valve and regulator must be
checked for safe operation. Make sure that the regulator
ventis protected againstblockage.
When your connections are made, check for gas leaks at
all joints (not just the ones you made). Apply some soapy
water to all gas fittings and gas valve. Soap bubbles are
a sign of a leak.
NOTE: Donot apply soap solution to the pilot or pilot orifice
area.Ifyouhavealeak,shutoffthe gas.Afterverifyingthat
required gaskets are in place, tighten appropriate fittings
tostopleak.Turnthe gas on and checkagainwithasoapy
solution. Never test for gas leaks using a match or
flame.
Fig. 4 - Installation of Gas Pressure Regulator
Altitude Natural Gas Liquid Propane
inches W.C: inches W.C:
0' - 2.000 ft 5.7" 10.5"
2.000 ft - 4.500 ft 4.6" 8.4"
GAS INLET PIPE
PRESSURE TAP
PRESSUREREGULATOR
(with directional arrow on
reverse side pointing
upward)
Thepressure regulator provided with theheaterisadjusted
to deliver the proper gas pressure (as indicated on the
rating plate and in the manual for altitude up to 2000 feet
(660meters)abovesealevel.Onappliancesbeinginstalled
above2000 ft(660meters)elevation,the inletgaspressure
should be set at installation to the value shown below.
NOTE: The gas pressures specified below refer to
pressures taken at the pressure tap on the gas inlet
pipe just above the regulator (See Fig 4). These
readings should be taken while the heater is operating
at full input — i.e. maximum water flow with the
temperature dial selector turned all the way
clockwise.
Above 4.500 ft consult your local gas provider.
PLASTIC VENT CAP
MAXIMUM INLET GAS FLOW PRESSURE SETTING

86 720 606 804 (02.10)
Nominal
Iron Pipe Black Iron Pipe
Size, Length of Pipe, Feet
Inches 10 20 30 40 50 60 70 80 90 100 125 150
1/2 275 189 152 129 114 103 96 89 83 78 69 63
3/4 567 693 315 267 237 217 196 185 173 162 146 132
1 107 732 590 504 448 409 378 346 322 307 275 252
1 1/4 220 149 121 103 913 834 771 724 677 630 567 511
1 1/2 330 229 185 155 141 127 118 108 102 976 866 787
2 622 433 346 299 264 239 220 204 192 1811 1606 1496
Copper
Outside Length of Tubing, Feet
Diameter,
Inch 10 20 30 40 50 60 70 80 90 100
3/8 39 26 21 19 _ _____
1/2 9262 5041 37 3531292726
5/8 199 131 107 90 79 72 67 62 59 55
3/4 329 216 181 145 131 121 112 104 95 90
7/8 501 346 277 233 198 187 164 155 146 138
GAS PIPING, CONNECTIONS and Gas Regulator
Before connecting the gas supply, check the rating plate on the right side of the front cover to be sure that the heater is
rated for the same gas to which it will be connected.
In the United States: The installation must conform with local codes or, in the absence of local codes, the National Fuel
GasCodeANSIZ223.1/NFPA54.
InCanada:The Installationshould conformwith CGAB149INSTALLATION CODES and /orlocal installation codes.
FOR NATURAL GAS
Maximum Capacity of pipe in Cubic Feet of Gas per Hour
forGasPressureof0.5PsigorlessandaPressuredropof
0.3 in Water Column.
(Basedona0.60Specific GravityGas)Btunumbersgiven
inthousands.
GAS LINE SIZING
The gas supply piping should be sized according to the Applicable Plumbing Code for a maximum draw of 117,000 BTUH. First
determine the effective length of the gas supply line by measuring the actual length of piping, and then adding 5 ft. for every elbow
or “T”to the actual length. Use the charts below to determine the pipe diameter necessary to accommodate the BTU demand
of the unit. If there are more gas drawing appliances on the line, size according to the maximum amount of BTU demand.
FollowboxednumbersforpipingjustoneAquastar125HX
(example:3/4”B.I.NaturalGaspipefor30 ft. will handle
152,000btu’s).For multipleappliancescombinethetotal
btuinput load andthen refer toapplicable chart below.
FOR LP GAS
MaximumCapacityofPipein Thousands of
BTUperHourof UndilutedPetroleumGases
(at11inches WaterColumn InletPressure)
(BasedonaPressureDropof0.5InchWater
Column).
MaximumCapacity of Semi-Rigid
Tubing in Thousands of BTU per Hour of
UndilutedLiquified Petroleum Gases(at 11
inchesWater Column Inlet Pressure)
(BasedonaPressureDropof0.5InchWater
Column)
*Source National FuelGas Code NFPA54,ANSI Z223.1.
Nominal
Iron Length of Black Iron Pipe, Feet
Pipe Internal
Size, Diameter
inches inches 10 20 30 40 50 60 70 80 90 100 125 150 175 200
1/4 0.364 32 22 18 15 14 12 11 11 10 9 8 8 7 6
3/8 0.493 72 49 40 34 30 27 25 23 22 21 18 17 15 14
1/2 0.622 132 92 73 63 56 50 46 43 40 38 34 31 28 26
3/4 0.824 278 190 152 130 115 105 96 90 84 79 72 64 59 55
1 1.049 520 350 285 245 215 195 180 170 160 150 130 120 110 100
1 1/4 1.380 1050 730 590 500 440 400 370 350 320 305 275 250 225 210
1 1/2 1.610 1600 1100 890 760 670 610 560 530 490 460 410 380 350 320
2 2.067 3050 2100 1650 1450 1270 1150 1050 990 930 870 780 710 650 610
2 1/2 2.469 4800 3300 2700 2300 2000 1850 1700 1600 1500 1400 1250 1130 1050 980
3 3.068 8500 5900 4700 4100 3600 3250 3000 2800 2600 2500 2200 2000 1850 1700
4 4.026 17,500 12,000 9,700 8,300 7,400 6,80 6,200 5,800 5,400 5,100 4,500 4,100 3,800 3500

96 720 606 804 (02.10)
OPERATINGINSTRUCTIONS
Before proceeding with the operation of the heater make
sure that the system is filled with water.
Open the cold water inlet supply to the heater fully.
Opena hot water faucet to permit the water to fill the heater
andthe pipingandtoeliminatethe air trappedinthesystem
Closethe hot waterfaucet after the water flowsfreely and
allthe air hasescaped from the system. Thewater heater
is now ready to operate.
FOR YOUR SAFETY READ BEFORE
OPERATING YOUR HOT WATER HEATER
Warning:Ifyoudonot followtheseinstructions exactly,
a fire or explosion may result causing property
damage, personal injury or loss of life.
A. This appliance is equipped with electronic ignition for
lightingthe pilot andmainburners.Whenturningthe heater
on, follow these instructions exactly.
B. Before operating the unit, set the On/Off switch to the
On ( ) position. The On/Off switch is located behind
the flip-down coverplate on the front panel strip. Smell all
aroundtheappliancearea for gas. Besuretosmell next to
the floor because some gas is heavier than air and will
settle on the floor.
WHAT TO DO IF YOU SMELLGAS
- Do not try to light any appliance.
- Do not touch any electric switch; do not use any phone
inyourbuilding
- Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
- If you cannot reach your gas supplier, call the fire
department.
C. Useonlyyour hand topushin the on/offcontrolbutton.
Neveruse tools. Follow these instructions exactly.Ifcontrol
buttonisjammed, close the gassupplyand call a qualified
servicetechnician.Attemptedforceful repairmay result in
afire or explosion.
D. Do not use this appliance if any part has been under
water. Immediately call a qualified service technician to
inspecttheapplianceandto replace any part ofthecontrol
system and any gas control which has been under water.
WATER CONNECTIONS
Whenfacingtheheater, the coldwaterinletis on your right
and the hot water outlet is on your left.
Although water piping throughout your structure may be
other than copper, we recommend that copper piping be
usedforatleastthreefeetbeforeandafter theheater(follow
local codes if more stringent). Keep water inlet pipe to no
less than 1/2 inch diameter to allow the full flow capacity.
Rememberthatwaterpressuremustbesufficienttoactivate
theheaterwhen drawing hot waterfromthe top floor.Ifthe
hot and cold connections to the heater are reversed, the
heater will not function. TheAquaStar 125HX is provided
withoneflexible type connector thatmustbe connected to
the inlet fitting of the water valve as shown in Fig 5. ½”
Copper or brass fittings work best when connected to the
connectors. See Fig 6. The flexible type connector seals
to the water valve by means of a union connection with a
washer type gasket at the joint. No pipe dope or thread
tape is to be used at this joint.
This fitting seal to the water valve by means of a union
connectionwith a washertype gasket at the joint.No pipe
dopeorthreadtapeistobeused at these joints. Be certain
therearenolooseparticles or dirt in thepiping.Blowoutor
flushthe lines beforeconnecting to theAquaStar. Full port
valvesshould be installedon both thecold water feedline
andthe hotwateroutletline to facilitateservicingthe heater.
For installation on a private well system, be sure that the
water pressure is set between 30 and 50 psi.
Fig. 5 - Water valve - top view
Connecting the pressure relief valve (PRV)
Alistedpressure relief valve supplied withtheheater must
be installed at the time of installation. No valve is to be
placed between the PRV and the heater. No reducing
couplingorotherrestrictionmaybeinstalledinthedischarge
line.
The discharge line must be installed such that it allows
complete drainage of both the PRV and the line.
The location of the PRV must be readily accessible for
servicingor replacement,and bemounted asclose tothe
water heater as possible. See Fig 7. To install the PRV, a
suitable fitting connected to an extension on a “T”fitting
can be sweated to the hot water line.
Supportallpiping.
Fig. 7 - Pressure Relief Valve
Fig. 6 - Plumbing connections for the Aquastar
125HX
THREADEDASSEMBLY SWEATEDASSEMBLY
PIPEPRVTO
APPROPRIATE
DISCHARGE
1/2”FLEX
PIPEPRVTO
APPROPRIATE
DISCHARGE
1/2”FLEX

10 6 720 606 804 (02.10)
Thepositionyouselectonthetemperatureadjustmentknob
willdepend on thetemperatureoftheincomingwater(50°F
isaverageintheU.S.).Inwarmweatherregionswherethe
incomingcold water isgenerally warmer, orduring the hot
weather months in some other areas a midway setting on
the temperature adjustment knob would produce a
temperature rise of about 70°F, giving an output of
approximately120°F. At this setting, ifitis still necessary,
one could mix a small amount of cold water in a shower
andhavea comfortable shower atabout3gallons/minute.
Duringthecolder months, or incoldclimate areas, itmight
be necessary to set the control to the maximum position,
all the way clockwise to the right.
If you supply the AquaStar 125HX, with preheated water
(i.e.) in a solar installation the unit could overheat. It will
thenshut offonsafetywhen theoutlettemperaturereaches
194°F. For thistypeof application, purchase asolarmodel
125B LPS or 125B NGS.
Fig. 8 - Temperature Adjustment Knob
LIGHTINGAND OPERATING INSTRUCTIONS
1. STOP!Read the safetyinformation above on thislabel.
2. The gas valve must be shut off by putting the ON/OFF
switchtoposition “ ”. Wait five(5) minutes toclear
out any gas. If you smell gas, STOP! Follow “B”in the
safety information above. If you do not smell gas, go to
the next step.
3. This water heater is equipped with a safety pilot burner
and an automatic ignition control system.
4. Set the ON/OFF switch (flip down cover plate on front
panel strip) to the “ ” position. In this position, the
water heater is ready to use.
5. Ifthered LED indicator light isflashing,this is a warning
thatthe water pressureis not enoughto ignite the main
burner.
6. Turn the hot water faucet on to the minimum flow rate
required to activate the heater. The automatic ignition
system first ignites the safety pilot burner which then
ignites the main burner in about 4 seconds.
7. The green LED indicator is on when the main burner is
on.
8. The pilot flame will extinguish 10-30 seconds after the
burners come on. The burners will remain on until the
hot water tap is turned off.
NOTE: On a first time initial installation, existence of air in
the gas supply line and in the water line may cause some
ignitiondelay. Inthat case, repeatedly open andclose the
hot water tap in order to restart the ignition process until
all the air has been purged.
TO TURN OFF GAS TO APPLIANCE
Turn off the manual lever on the gas supply line to the
heater and set the ON/OFF switch to the OFF ( )
position. See Fig 9.
SETTING THE WATER TEMPERATURE
The AquaStar 125 HX LP and 125 HX NG water heaters
haveagascontrolthatmodulatesburnerinputinresponse
to flow. Its purpose is to ensure that the hot water
temperature will remain steady, although the water flow
demandmightvary (down to 1/2gal/minute).Toadjustthe
temperature on yourAquaStar, turn on a hot water faucet
to its maximum flow. At the water heater, turn the large
knob located beneath the main gas control on the front of
the heater all the way to the right (clockwise). See Fig 8.
Thiswillproduceatemperaturerise of approximately 90°F
atflow rates between0.5and2.0gallonsper minute. Given
that average incoming water temperatures are 50°F, this
heater will produce approximately 140°F water at these
flow rates. Turning the dial all the way to the left
(counterclockwise) will produce a temperature rise of
approximately 45°F for flow rates between 1.1 and 3.7
gallons per minute. It is safest to select a comfortable
temperatureand not haveto mix in cold water.
TemperatureAdjustment Knob
Tostartandtoshutdown
the appliance press the
button “ ”.
The switch is located
behind the flip down
cover plate on the front
panel strip.
G661_004
Decrease
temperature and
increase flow
Increases temperature
and decreases flow
Fig. 9 - Principles of Operation
- on
- off
Green light on = main
burner on.
Green light off = main
burner off.
Ifthered light is flashing,
that means the water
flow is not enough to
ignite the burner.

116 720 606 804 (02.10)
Fig. 10 - Characteristic Pilot Flame
(Pilotassembly shown without pilot hood)
MAINTENANCE AND SERVICE
REVIEWMAINTENANCETABLEON THEBACKOFTHIS
MANUAL.
Approximatelyonceayear,theAquaStarshouldbechecked
and cleaned. To remove the front cover, first remove the
incandescent particle tray, then pull off the temperature
adjustmentknobandunscrew andremovethe plasticcollar.
Pull main cover out toward you and lift up and out. THE
FOLLOWINGOPERATIONSSHOULDBEPERFORMED
BYAQUALIFIEDSERVICEPERSON:
Vent System: Should be checked annually. Clean and
repair as needed.
Water Valve(Part#8707002649):Thewatervalveonthis
heatershouldbeservicedperiodically.Lubricatecomponent
36 on page 16 with a small amount of silicon, faucet or
lithiumgreaseeverytwoyearsto keep its o rings freshand
pushrod sliding smoothly. Every 3-5 years replace
component 36 on page 16. The frequency will depend on
the mineral content of the water and conditions of use or
whenever signs of corrosion appear at the gas and water
valvejoint.Periodicallycheckthat the water inlet filter(#27
onpage16)iscleanaswell.NOTE:Ifwatervalveisremoved,
be sure to also inspect the o ring seal on the end of the
righthand side waterpipe before re-installing. Lubricating
the o ring with lithium or faucet and valve grease is
recommended.
Pilot Flame: The pilot flame should burn with a clean,
sharp, blue flame and should resemble the diagram in
Fig.10.Iftheflameissoftandyellow,thepilotburnerorifice
mayneed to be cleanedorreplaced.Thepilotflameshould
be approximately 2 inches long, extending past the flame
sensor. If the flame is too small, it will not reach the flame
sensor and the burners will not come on.
Main Burner Flames: The main burner flames should be
blue, with a more intense blue cone in the center core.
Yellowflames could bea sign of wrongsize gas orificesor
dirty burners, or a blockage on the heat exchangers fins.
Ifsome burners haveyellowflameswhileothershavegood
flames,it is likely that dust, lint orspiderwebshavepartially
cloggedthe burner venturis.Toclean the burners,contact
a gas service person.
Mineral Scale Build-up: The AquaStar heater, when
operated at lower temperature settings, does not
accumulatemineral build-up. If however,theheateris used
at the higher temperature settings and the water has a
highmineralcontent,periodicdescaling may benecessary.
The heating coils should be flushed with a descaling
solution. The descaling is done only to the heat
exchanger.Thechemicalswilldamagethehydro-generator
andother parts. Consultyour dealer orControlled Energy
forinstructions.
TROUBLE SHOOTING
Introduction
TheAquaStar 125HX burners are activated by a waterflow
valve. Numerous water related problems can cause this
watervalve to malfunctionsuch as: Insufficientwater flow
volume to activate the burners at its minimum flow
requirement; Dirt in the water flow valve causing it to
malfunction;Sedimentbuild-upinfaucetaerators,orshower
heads;Unevenpressuresbetweencoldandhot.(withsingle
lever faucets) Plumbing cross overs. These water flow
relatedproblemscan cause theheaterto deliver less than
itsfull output,or to fail toignite or toshutdown completely.
To clean the pilot burner and/ or the pilot orifice : Turn
offthegastothe unit. Set the On/Off switchtoOff(position
). Remove the cover of the heater. To do so, pull off
thetemperature adjustmentknobandunscrew andremove
theplasticcollar. Pull maincoverout toward you andliftup
andout. The pilot orifice should be cleaned or replaced. Do
not enlarge the orifice.
Donotuseanywireorsharpobject tocleanorifices.Natural
gas orifices are large enough that you can usually clean
them by blowing through them. LP orifices, on the other
hand, are too small to clean and should be replaced.
To access the pilot orifice, remove 2 screws holding pilot
assembly in place. Then loosen compression fittings to
exposepilot orifice.
3mm
Correct gap between pilot
burner tip and electrode tip
PiezoElectrode
Flame sensor
Piezo
Fig. 11 - Pilot burner with pilot orifice
(Pilotassembly shownwithout pilothood)
PILOT ORIFICE

12 6 720 606 804 (02.10)
Problemsarestatedinuppercase,boldface.Mostcommon
causes for the problems follow in order of likelihood. The
suggestedsolutionsrequire that thecover be taken off.To
do this, remove incandescent particle tray, pull off the
temperatureadjustment knobandunscrewand removethe
plastic collar. Pull main cover out toward you and lift up
andout.
NO SPARK AT THE PILOT
1. On/Off switch is not ”On” (Position ).
TheOn/Offswitchislocatedbehindtheflipdown coverplate
on the front panel strip. See fig. 9.
2. Cross over in water lines
To confirm there is no cross-over in the plumbing, shut off
the cold water supply to the AquaStar and open all hot
water faucets. There should not be any water flowing at
any faucets. Water running is a sign of a plumbing cross-
over.Consultyourplumber.
3. Water flow is not sufficient to activate heater.
Waterflowrate at faucet is belowminimumflow needed to
activate heater. When temperature adjustment knob is
turned all the way clockwise, theAquaStar model 125HX
requires 1/2 gallon per minute flow to activate the heater.
As a reference, this is a flow which would fill a quart jar in
30 seconds. If the temperature adjustment knob is turned
fullycounterclockwise, aflow rateof 1.1 gallons/minute is
requiredtoactivate the heater.
The red LED light (located behind the coverplate on the
frontpanel) flashes when thewater flow isnot enough.
4. Water inlet filter is clogged
Waterflowisrestricted,preventingneeded flow to activate
heater. Clean water inlet filter screen.
5. Cold incoming water connection made to wrong
side of heater
Make sure cold water inlet connection is on the right side
ofheaterwhen you are facingheater.
6. Water valve parts may be dirty or components
damaged
Firstcheck that venturi isfree of dirtparticles. Water valve
and component parts must be totally free of dirt. In hard
waterareas, mineral deposits caneventually (3-5 years in
hard water areas) corrode the water valve parts to a point
where they will need replacing. Any sign of moisture or
corrosionatthejointofthewatervalveandthegas valve is
asign that thewatervalvecomponentsneedto be serviced
immediately.
7. Poor circuit connections at the ECO (overheat
sensor) or the flue gas safety device
Ignition sparker will not operate if the electrical circuit is
interrupted. Check that the connections to the ECO and
FlueGasSafetyDevicearesecureandtighten ifnecessary.
If the Aquastar is Powervented, check spill switch reset
SPARK APPEARS AT PILOT WHEN HOT WATER TAP
TURNED ON, BUT PILOT AND BURNERS WILL NOT
IGNITE
1. Air in the Gas Line
Normally this is a problem at time of initial installation,
afterthepipes have beenworkedon, or afteragas supply
line has been allowed to empty. Bleed the air trapped in
thegas line byturning the hotwater faucet on and offuntil
the air has been cleared from the line.
2. No gas to the AquaStar
A. Gas cock on gas line may not be open
B. Gas regulator may be shut or damaged. Replace or
unlockthe regulator.Note:Theregulator furnished with the
heater is exclusively designed for low gas pressure.
Excessivepressure will lock it up. Locking usually happens
when using propane gas if the gas pressure between the
gastankandthewaterheater’sgas regulator has not been
reduced. See Page 2 for recommended correct gas
pressure. To unlock a regulator, consult your gas supplier
or call CEC.
3. Pilot orifice or gas valve is dirty
Clogging of the pilot burner can be caused by dust in the
airor dirt inthe gas. Thepilot orifice orgas filter mayneed
to be cleaned or replaced.
4. Pilot electrovalve switch may need to be replaced
(See Fig 13).
Call CEC.
5. Electronic Control Box may need to be replaced
(See Fig 13).
Call CEC.

136 720 606 804 (02.10)
Fig. 13 - Electrical wiring diagram
5. Flue gas safety device tripped
Ventilate the room and re-ignite the appliance 10 minutes
later. If it happens again, contact your service person or
ControlledEnergy..
WATER IS TOO HOT
1.Temperature Selection too high
Turnthe temperature adjustmentknob counter-clockwise
(to the left) to lower the maximum water temperature.
Note: This will increase the activation flow rate.
2. Inlet water temperature is too hot (as with solar
preheated water or high ground water
temperatures)
Decrease gas pressure. Note: Only the Model “S”
AquaStar should be used if the inlet water is preheated.
WATER IS NOT HOT ENOUGH
1. Temperature selection too low.
Changethe setting.Turnthetemperatureadjustmentknob
clockwise (to the right).
Note: This will decrease the activation flow rate.
2. Btu input is toolowdue to insufficient gas pressure
It is extremely important for a tankless
instantaneous water heater to have the right size
gas line to obtain the correct gas pressure
See specifications on page 2. Unlike storage tank water
heaters, the burners of a tankless water heater must be
verypowerful to heatwater instantaneously sincethey do
this only at the time hot water is actually being used. It is
therefore imperative that the gas pressure requirement
bemetexactly. Insufficientgas pressure willdirectlyaffect
the water temperature at the time of usage. See page 2
for correct gas pressure settings and fig. 4 for locations
wheregas pressures are taken.
3. Btu input is too low due to insufficient gas supply
Make sure your main gas line is fully opened. If using LP
gas, be sure that the size of the propane tank is adequate
tosupply the requiredgas pressure.
4. Cold water is mixing with the hot water between
the AquaStar and the outlet
Comparewater temperature at outlet of the AquaStar(hold
theAquaStar’s outlet pipe with your hand) and at the tap.
If these two are very different, check for mixing valve or
plumbing crossover (see “NO SPARK AT THE PILOT”
paragraph #4). Where automatic “anti-scald”valves are
required by code, lower the temperature setting on the
AquaStar as much as possible and balance the pressure
between cold and hot water after the AquaStar.
5. Parts in water flow valve are corroded so that the
gas passage is not fully opening.
Contactyour service personorControlled Energy.
PILOT LIGHTS BUT BURNERS WILL NOT COME ON
1. Confirm water valve assembly is working properly.
2. Confirm the flame sensor is in its proper position.
3. Confirm the burner electrovalve switch is
functioning properly.
Call CEC
4. The Electronic Control Box (Fig. 13) may need to
be replaced.
Call CEC.
8 electronic control box
9 LED failure indicator
10 LED indicator main
burner operation
11 on/off switch
12 hydro-generator
13 flue gas safety device
1 burner electrovalve
2 gas control valve
3 pilot electrovalve
4 flame sensor
5 pilot electrode
6 overheat sensor
7 temperature limiter
MAIN BURNERS GO OUT DURING HOT WATER USE
1. Flow rate diminished below activation rate
2. Unbalanced pressure in the water lines
The added restriction caused by the AquaStar in the hot
watersystem can result inuneven pressures betweenthe
coldand the hot. In suchcases when mixing cold waterat
thetap,thelowerhot water pressure may beoverpowered
by a much higher cold water pressure, which may cause
the AquaStar burners to shut down. Make sure faucet
aerators and showerheads are free of minerals and dirt.
Do not add any flow restrictor to the shower head.
3. Minimum inlet pressure on well is inadequate
Checktheinletwater pressure. On a privatewell,raisethe
minimum pressure setting to 30 psi. Confirm that the
pressure tank is not water logged.
4. ECO (overheat sensor) tripped due to overheating
re-ignitethe appliance 10 minutes later. If it happens again,
contactyour serviceperson or ControlledEnergy.

14 6 720 606 804 (02.10)
HOTWATERTEMPERATURE FLUCTUATES
1. Unbalanced pressure in waterlines
The added restriction caused by the Aquastar in the hot
watersystem can result inuneven pressures betweenthe
coldand the hot. In suchcases when mixing cold waterat
thetap,thelowerhot water pressure may beoverpowered
by a much higher cold water pressure, which may cause
the Aquastar burners to shut down. Make sure faucet
aerators or shower heads are free of minerals. Do not
add any flow restrictor to the shower head.
2. Cold water is mixing with the hot water between
the AquaStar and the outlet
See #4 under “NO SPARK AT THE PILOT”.
3. Inlet water pressure is erratic due to inadequate
supply water pressure or saturated pressure tank
on well system
Check the inlet water pressure. On a private well, raise
minimum pressure setting to 30 psi. Confirm that the
pressure tank is not water logged.
4. Gas pressure is too low
See page 2 for correct specifications.

156 720 606 804 (02.10)
Fig. 14 - Diagram of AquaStar 125 HX
1. Heat exchanger
2. Pilot assembly
3. Burner manifold gas
pressure test nipple
4. Main gas burner
5. Pilot gas tubing
6. LED failure indicator
7. on/off switch
8. LED operation indicator
9. Watervalve
10. Temperature adjustment selector
11. Gas inlet gas pressure test nipple
12. Hose
3
1
4
10
11
2
9
8
6
7
5
12
6 720 606 804-10.1AL

16 6 720 606 804 (02.10)
Fig. 15 - INTERIOR COMPONENTS DIAGRAM AND PARTS LIST

176 720 606 804 (02.10)
Fig. 15
INTERIOR COMPONENTS DIAGRAM
AND PARTS LIST 125HX
1 Cover 8 705 421 752
2 Temperature adjustment knob 8 702 000 111
3 Temperature adjustment collar 8 700 403 008
4 Draft diverter 8 705 505 354
5 Heat exchanger 8 705 406 235
7 Main burner 8 708 120 298 NG
7 Main burner 8 708 120 296 LP
8 Burner assembly washer 8 710 103 060
9 Throttle disc 8 700 100 174 LP
10 Pilot burner 8 708 105 491 LP
10 Pilot burner 8 708 105 337 NG
11 Piezo electrode 8 718 107 067
12 Pilot orifice 8 708 200 069 NG
12 Pilot orifice 8 708 200 312 LP
13 Pilot tube 8 700 707 370
14 Washer pilot tube 8 700 103 173
15 Gas valve 8 707 011 917 NG
15 Gas valve 8 707 011 945 LP
16 Diaphragm switch 8 708 504 021 NG
16 Diaphragm switch 8 708 504 049 LP
17 Pilot electrovalve 8 708 501 249
18 Burner electrovalve 8 708 501 250
19 O-ring 8 700 205 023
20 Hydro-generator 8 707 406 043
21 Cold water pipe 8 700 705 947
22 Outlet flex hose 8 700 703 139
23 Washer 8 700 103 658
24 Water valve 8 707 002 649
25 Water valve cover 8 705 500 101
26 Diaphragm 8 700 503 053
27 Water inlet filter 8 700 507 001
28 Water valve selector screw 8 708 500 289
29 Volumetric water governor 8 705 705 009
30 Venturi 8 708 205 279
31 Electronic control box 8 707 207 085
32 Flame sensor cable 8 704 404 040
33 Electrode cable 8 704 404 039
34 Flue Gas Sensor 8 707 206 345
35 Set of cables 8 704 404 038
36 Pushrod 8 700 306 114
37 O-ring 8 700 205 120
38 O-ring 8 700 205 119
39 Water connection gasket 8 710 103 043
40 Water elbow fitting 8 700 703 114
41 Overheat sensor (ECO) 8 707 206 040
42 Connecting pipe hot 8 700 715 178
43 Washer 8 710 103 045

18 6 720 606 804 (02.10)

196 720 606 804 (02.10)

Replacement Parts available from North American
Distributor
CONTROLLED ENERGY CORP.
340 Mad River Park
Waitsfield, Vermont 05673
Phone[phone]
Fax [phone]
www.controlledenergy.com
[e-mail]
VULCANO Termodomésticos S.A.
Estrada de Cacia
3801 - 856 Aveiro - PORTUGAL
Recycled paper
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RAEYYREVESRAEY2YREVESRAEY5-3YREVE
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†
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†
NEERCSRETLIFRETAWTCEPSNI
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© 2001 Controlled Energy Corporation,
Waitsfield, VT all rights reserved
INSTALLATION CHECKLIST
GAS LINE SIZE
Natural Gas
Nominal Iron Pipe Size* 1/2" 3/4" 1"
MAXIMUM LENGTH 10' 40' 150'
Liquid Propane
Semi-rigid Tubing 1/2" 5/8" 3/4" 7/8"
MAXIMUM LENGTH NOT
RECOMMENDED 20' 60' 150'
* Flex tubing greatly reduces capacity and, therefore, is not recommended.
Minimum Vent Size* and Height
Minimum Diameter Minimum Height**
5 inches 6 feet
* NOTE
:
Vent size must not be restricted. Installation must comply with national fuel gas code venting requirements
for a 117,000 Btu Category I appliance and any applicable local codes.
Water Pressure
For installation on well systems, insure that the minimum pressure tank setting is between 30-50 psi.
** NOTE: Minimum vent height must be 6 feet, provided there are no elbows. Termination of the vent must be 2
feet above any obstructionwithin a 10 foot radius of vent pipe. Consult your gas utility or National Gas Fuel Code
i
f vent will have elbows or share venting with another appliance. The vent connector should have as much vertical
rise as possible (minimum 12") before any horizontal run.