Bosch AquaStar 125B LPS Installation And Operating Instructions Manual Download Page 4

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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.
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, unvented closet 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 not approved for
outside installation. 

Drain the heater entirely if freezing

temperatures are anticipated in the area where heater is
installed by disconnecting both the inlet and outletelbow
connections at the rear of heater. Additionally remove the
drain plug under the water valve. See Fig 0.

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 more 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.

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.

Fig. 0 - Water heater drain plug

Summary of Contents for AquaStar 125B LPS

Page 1: ... 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 instructions If you cannot reach your gas supplier call the fire department In...

Page 2: ...off sensor Stainless steel burners with stabilized blue flame Built in corrosion resistant draft inducer Compact space saver mounts on a wall with two hooks Easily removable one piece cover Easy one person installation Adjustable water flow restrictor to ensure that water flow demand will not exceed the heating capacity of the heater Easy pilot flame lighting with push button piezo ignition BOSCH ...

Page 3: ...INIMUM INSTALLATION CLEARANCES FROM COMBUSTIBLE AND NON COMBUSTIBLE MATERIALS FOR ALCOVE OR CLOSET INSTALLATIONS FRONT VIEW SIDE VIEW AQUASTAR MODEL 125BS MODEL 125BS TOP A 12 FRONT B 4 BACK 0 SIDES 4 FLOOR C 12 VENT DIAMETER 5 ...

Page 4: ... 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 in...

Page 5: ...r combustion ventilation and dilution of flue gasses Appliances located in confined spaces The confined space must be provided with two permanent openings one commencing within 12 inches of the top and one commencing within 12 inches of the bottom of the enclosure Each opening must have a minimum free area of one square inch per 1000 Btu hr if all air is taken from inside the building 2000 Btu hr ...

Page 6: ...ttached across a pair of studs and then the heater should be attached to the support boards See Fig 1 Expansion and contraction of piping due to changing water temperature in the pipes imparts movement to the heater which if mounted directly to a brittle friable board such as plasterboard can cause failure of mounting In earthquake prone zones BBTNA recommends that installers use a large washer an...

Page 7: ... than 45 degrees from the vertical is considered horizontal Horizontal sections must slope upwards at least inch for every foot of its horizontal length and be properly supported Keep the horizontal section short and avoid too many elbows The minimum vertical gas vent height allowed is 6 feet horizontal vent connectors and elbows are not to be considered in the total gas vent height All gas vent s...

Page 8: ...ney Also an approved thimble or collar must be used when penetrating a masonry chimney A Existing INTERIOR Masonry Chimney The metal gas vent pipe should be permanently mounted inside the masonry chimney Double wall Type B gas vent is recommended The masonry chimney may have to be tile or metal lined before the insertion of the gas vent pipe check local codes for clarification The lining material ...

Page 9: ...lly being used the vent pipe is therefore cold except for the short durations when hot water is being used it is therefore very important that 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 The AquaStar 125B S instantaneous water heaters have built in draft diverters and are designed for indoor installation only...

Page 10: ...l Fuel Gas Code NFPA 54 ANSI Z223 1 No Additional Allowance is necessary for an ordinary number of fittings GAS LINE SIZING Fig 4 Nominal Iron Pipe Internal Length of Black Iron Pipe Feet 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 ...

Page 11: ...ines to facilitate servicing the heater see Fig 7 For installation on a private well system with the use of a pressure tank the lowest pressure range setting recommended is 30 50 psi 2 07 3 45 bar Fig 5 Installation of Gas Pressure Regulator The pressure regulator provided with the heater is adjusted to deliver the proper gas pressure as indicated on the rating plate and in the manual for altitude...

Page 12: ...ont cover of heater 1 STOP Read the safety information above on this plate 2 The gas valve must be turned off by depressing the gas valve off button 3 Wait five 5 minutes to clear out any gas If you smell gas STOP Follow B in the safety information above on this plate If you don t smell gas go to the next step 4 The pilot burner is located behind the peephole in the front center of the jacket dire...

Page 13: ... for a hot bath Handwashing should not be done in water hotter than 112 and cooler for older adults young children or persons with sensory loss Remember that scalding can occur in 20 seconds with 135 water MAINTENANCE AND SERVICE see maintenance table on back of manual Approximately once a year the AquaStar should be checked and cleaned To remove the front cover first remove the incandescent parti...

Page 14: ...s weak and thus can no longer heat the thermocouple sufficiently For cleaning purposes the air filter screen is pulled off washed and blown out The pilot orifice has likewise to be cleaned or exchanged Consult a gas service person to clean the pilot 4 Air in the Gas Line Note Normally this is a problem only at the time of initial installation after the pipes have been worked on or after a propane ...

Page 15: ...t your plumber 7 Water valve parts may be dirty or components damaged Water valve and component parts must be totally free of dirt First check that the venturi is free of dirt particles In hard water areas mineral deposits can eventually 3 to 5 years in hard water areas corrode the water valve parts to a point where they will need replacing Any sign of moisture or corrosion at the joint of the wat...

Page 16: ...o be performed see 7 under BURNERS DO NOT IGNITE WHEN HOT WATER IS TURNED ON 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 by a much hi...

Page 17: ...ly 3 Burner manifold gas pressure test nipple 4 Main gas burner 5 Pilot gas tubing 6 Gas valve 7 Piezo igniter 8 Location of pressure tap screw 9 Water valve 10 Gas inlet gas pressure test nipple 5 1 4 7 9 3 10 6 2 8 Fig 10 Diagram of AquaStar 125 BS ...

Page 18: ...18 6 720 606 518 AQ 125 BS Fig 11 INTERIOR COMPONENTS DIAGRAM AND PARTS LIST ...

Page 19: ...lot Tube 8 710 707 166 15 Thermocouple 8 747 202 083 16 Burner assembly washer 8 710 103 060 17 Gas valve 8 707 011 467 LP Gas valve 8 707 011 469 NG 18 Gas supply pipe 8 700 705 464 19 Electromagnet 8 747 201 094 20 Electromagnet washer 8 700 103 144 21 Gas filter 8 700 507 051 22 Thermocable 8 747 202 078 23 Thermostat 8 707 206 039 24 O ring Thermostat 8 700 205 101 25 O ring Thermostat 8 700 2...

Page 20: ...20 6 720 606 518 Fig 12 Flow chart of Aquastar 125 BS ...

Page 21: ...will furnish a replacement part free of charge Shipping costs In addition to supplying the replacement part s BBTNA will provide ground service delivery for these parts Expedited or upgraded shipping will be charged to the customer Service labor costs This warranty does not cover any labor costs associated with service removal or re installation of part s All such costs must be borne by the Purcha...

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Page 24: ... Cacia 3801 856 Aveiro PORTUGAL 3 1 e g a p e e s E L B A T E C N A N E T N I A M R A E Y Y R E V E S R A E Y 2 Y R E V E S R A E Y 5 3 Y R E V E E V L A V R E T A W E T A C I R B U L E V L A V R E T A W D L I U B E R N E E R C S R E T L I F R E T A W T C E P S N I Y L B M E S S A T O L I P T C E P S N I Y L B M E S S A T N E V T C E P S N I R E N R U B N I A M T C E P S N I Recycled paper 2006 BB...

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