Bosch AquaStar 125X LP Installation And Operating Instructions Manual Download Page 4

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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
conform with local codes or, in the absence of local codes,
the National Fuel Gas Code ANSI Z223.1/NFPA 54.
In Canada: The Installation should conform with CGA
B149.(1,2) INSTALLATION CODES and /or local installation
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. The place where you install the heater must have enough
ventilation. The National Fire Codes do not allow gas fired
water heater installation in bathrooms, bedrooms or any
occupied rooms normally kept closed. See the section below
on locating the heater.

4. You must vent your heater. See section on VENTING,
Page 6.

5. The appliance must be disconnected from the gas supply
piping system during any pressure testing at pressures in
excess of 1/2 Psig (3.5 kPa).
The appliance must be isolated from the gas supply piping
system by closing its individual manual shutoff valve during
any pressure testing of the gas supply piping system at
test pressures equal to or less than 1/2 Psig (3.5Kpa).
The appliance and its gas connection must be leak tested
before placing the appliance in operation.

6. Keep water heater area clear and free from combustibles
and flammable liquids. Do not locate the heater over any
material which might burn.

7. Correct gas pressure is critical for the optimum
operation of this heater (see specifications on page 2). 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, and see the section on connecting the gas supply.

8. Should overheating occur or the gas supply fail to shut
off, turn off the gas supply at the manual gas shut off valve
on the gas line.

9. Do not use this appliance if any part has been
underwater.  Immediately call a qualified service technician
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
safety and for proper heater operation, you must provide an
abundant supply of combustion air and a proper venting
installation.

Fig. 0 - Water heater drain plug

The heater may still operate even when improperly vented.
It will, however, be less efficient and could eventually damage
the heater. It could even result in human sickness or death
due to oxygen deprivation and carbon monoxide poisoning.
Follow the guidelines 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
exhaust fans, ventilation systems clothes dryers, fireplaces
or wood stoves  could create a vacuum effect in your home
which could cause dangerous combustion by-products to
spill back into your home rather than venting to the outside
through the flue. Confirm that your Aquastar is venting
properly when all these other appliances are running. See
section on venting.

Do not obstruct the flow of combustion and ventilation
air to the appliance.
  If installed near a clothes dryer it is
very important that the dryer be properly vented. Failure to
properly vent a dryer could result in a gradual accumulation
of lint on the water heater fin coils and burners, leading to a
dangerous condition of vent blockage and poor unsafe
combustion.

4. Your hot water lines should be kept short to save energy.
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
WHERE IT COULD FREEZE.
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 elbow
connections at the rear of heater. 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.

Summary of Contents for AquaStar 125X LP

Page 1: ...onal 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 Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s inst...

Page 2: ... heating capacity of the heater Electronic Pilot Ignition Safety Flame Sensor at pilot burner not thermocouple On Off Switch to activate system LED indicator flashes before battery needs replacement AquaStar 125X LP and 125X NG Specifications Gas Input max 117 000 Btu hr min 28 000 Btu hr Water Connection 1 2 Thread fitting H x W x D 29 3 4 x 18 1 4 x 8 3 4 Vent 5 Gas Connection 1 2 NPT thread Min...

Page 3: ...STIBLE AND NON COMBUSTIBLE MATERIALS FOR ALCOVE OR CLOSET INSTALLATIONS FRONT VIEW SIDE VIEW AQUASTAR MODEL 125X D870_072 MODEL 125 X TOP A 12 FRONT B 4 BACK 0 SIDES 4 FLOOR C 12 FLUE DIAMETER 5 Some local codes require 18 in garage installations ...

Page 4: ... underwater PROPER LOCATION FOR INSTALLING YOUR HEATER Carefully select the location of your new heater For your safety and for proper heater operation you must provide an abundant supply of combustion air and a proper venting installation Fig 0 Water heater drain plug The heater may still operate even when improperly vented It will however be less efficient and could eventually damage the heater ...

Page 5: ...n the right side panel of the cover Also each burner orifice is stamped with a number 79 for LPG and 120 for Natural Gas This product 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 The AquaStar water heater holds cold water in its copper h...

Page 6: ...ARNING Failure TO INCREASETHE VENT SIZE TO SIX INCHESAND or assure that the manifold pressure is set to proper value listed for applications at high altitudes will cause unsafe venting asphyxiation and will void CSA Certification Fig 3 Flue Adaptor for High Altitude Canadian Installations 5 X 6 ADAPTOR USED ON HIGH ALTITUDE The incandescent particle tray shipped loose in the carton with the water ...

Page 7: ...f the serving gas supplier WARNING The heater must be disconnected 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 less than 0 5 psig The...

Page 8: ...d between the PRV and the heater No reducing coupling or other restriction may be installed in the discharge line The discharge line must be installed such that it allows complete drainage of both the PRV and the line THREADEDASSEMBLY SWEATEDASSEMBLY The location of the PRV must be readily accessible for servicing or replacement and be mounted as close to the water heater as possible See Fig 7 To ...

Page 9: ...about 4 seconds 7 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 ignition delay In that case repeatedly open and close the hot water tap in order to restart the ignition process until all the...

Page 10: ... the center core Yellow flames could be a sign of wrong size gas orifices or dirty burners or a blockage on the heat exchangers fins If some burners have yellow flames while others have good flames it is likely that dust lint or spider webs have partially clogged the burner venturis To clean the burners contact a gas service person Mineral Scale Build up The AquaStars heater when operated at lower...

Page 11: ...Water valve parts may be dirty or components damaged First check that venturi is free of dirt particles Water valve and component parts must be totally free of dirt In hard water areas mineral deposits can eventually 3 5 years in hard water areas corrode the water valve parts to a point where they will need replacing Any sign of moisture at the bleed hole is a sign that the water valve components ...

Page 12: ...ar 6 Parts in water flow valve are corroded so that the gas passage is not fully opening HOT WATER TEMPERATURE FLUCTUATES UNIT DEACTIVATED 1 Unbalanced pressure in waterlines The added restriction caused by the Aquastar in the hot water system can result in uneven pressures between the cold and the hot In such cases when mixing cold water at the tap the lower hot water pressure may be overpowered ...

Page 13: ...itch 12 Gas inlet gas pressure test nipple 13 LED 2 Cold water is mixing with the hot water between the AquaStar and the outlet See 4 under NO SPARKAT 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...

Page 14: ...14 Fig 15 INTERIOR COMPONENTS DIAGRAM AND PARTS LIST ...

Page 15: ... 708 504 021 15 Diaphragm switch LPG 8 708 504 049 16 Pilot burner assembly LPG 8 708 105 491 16 Pilot burner assembly NG 8 708 105 337 17 Electrode ignition group 8 718 107 067 18 Injector pilot NG 8 708 200 069 18 Injector pilot LPG 8 708 200 312 19 Pilot gas tube 8 700 707 349 20 Washer 8 700 103 173 21 Electronic control box 8 707 207 011 22 Battery box 8 700 505 062 23 Set of cables complete ...

Page 16: ...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 W...

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