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INSTALLATION AND OPERATING INSTRUCTIONS FOR AUTOMATIC
INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND
LIQUEFIED PETROLEUM GAS
MODEL 125B LPL and 125B NGL (Non-Modulated)
Certified for space heating in combination with potable water only
Intended for either recirculation to storage or cold water inlet flow that is non-varying.
WARNING
: Improper installation,
adjustment, alteration, service or maintenance can
cause injury or property damage. Refer to this manual.
For assistance or additional information consult a
qualified installer, service agency or the gas supplier.
Upon completion of the installation, these instructions
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.
Warning: If you do not follow these instructions exactly, a
fire or explosion may result causing property damage,
personal injury or loss of life.
All manuals and user guides at all-guides.com
Suitable for heating potable water
Not certified for space heating only.
WARNING
If the information in this manual is not followed
exactly, a fire or explosion may result causing property
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.
- 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.
- Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
TABLE OF CONTENTS
Specifications .................................................... Page 2
Rules for safe operation ...................................... Page 4
Locating the Heater ............................................ Page 5
Combustion Air Requirements ............................ Page 5
Mounting the Heater ........................................... Page 6
Venting the Heater ............................................. Page 6
Gas Connections ............................................... Page 7
Water Connections ............................................ Page 9
Safety before lighting the pilot .......................... Page 10
Lighting instructions ......................................... Page 10
About Water Temperature ................................ Page 10
Trouble Shooting ............................................... Page 11
Diagram of AquaStar ......................................... Page 15
Components and Parts List .............................. Page 16
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Related Manuals for Bosch Aqua Star 125B LPL
Summary of Contents for Bosch Aqua Star 125B LPL
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Page 1: Table Of Contents
All manuals and user guides at all-guides.com INSTALLATION AND OPERATING INSTRUCTIONS FOR AUTOMATIC INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND LIQUEFIED PETROLEUM GAS MODEL 125B LPL and 125B NGL (Non-Modulated) Suitable for heating potable water Certified for space heating in combination with potable water only Not certified for space heating only. -
Page 2: Specifications
- Easy pilot flame lighting with push button piezo ignition. 3.7 GPM at 45° rise Min. Water Flow 1.8 gal/min LP GAS Supply Pressure BOSCH is constantly improving our products, therefore (before Aquastar regulator) min.: 11” W.C. specifications are subject to change without prior max.: 14”... - Page 3 All manuals and user guides at all-guides.com FRONT VIEW SIDE VIEW MINIMUM INSTALLATION CLEARANCES FROM COMBUSTIBLE AND NON COMBUSTIBLE MATERIALS FOR ALCOVE OR CLOSET INSTALLATIONS MODEL 125BL TOP (A) 12 " FRONT (B) 4 " BACK 0 " SIDES 4 " FLOOR (C) 12 "...
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Page 4: General Rules To Follow For Safe Operation
All manuals and user guides at all-guides.com If you are using the AquaStar for combined space heating and potable water heating (see schematic diagram below), all piping and other components connected to the system must be suitable for potable water, (b) toxic chemicals such as those commonly used for boiler treatment to prevent corrosion and freezing must not be introduced into the system, and (c) if the space heating requires water temperatures higher than those required for do- mestic, potable water, a mixing valve or other similar device must be provided to reduce... -
Page 5: Proper Location For Installing Your Heater
All manuals and user guides at all-guides.com 7. Correct gas pressure is critical for the optimum WARNING: The water in this water heater is cold operation of this heater (see specifications on page 2). Gas and always remains cold except for the times that hot piping must be sized to provide the required pressure at water is being used DO NOT INSTALL IN AN AREA the maximum output of the heater, while all the other gas... -
Page 6: Mounting Installation
All manuals and user guides at all-guides.com dilution of flue gases. which, if mounted directly to a brittle, friable board, such Appliances located in confined spaces: as plasterboard, can cause failure of mounting. The confined space must be provided with two permanent In earthquake-prone zones, CEC recommends that openings, one commencing within 12 inches of the top and installers use a large washer and lag screw through the... -
Page 7: Gas Connections
All manuals and user guides at all-guides.com Code if vent will have elbows or share venting with another appliance. 5” X 6” ADAPTOR The vent connector should have as much vertical rise USED ON HIGH ALTITUDE as possible (minimum 12”) before any horizontal run. Optional powervent available in order to sidewall vent. -
Page 8: Gas Piping, Connections And Gas Regulator
All manuals and user guides at all-guides.com 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 Gas Code ANSI Z223.1/NFPA 54. -
Page 9: Water Connections
All manuals and user guides at all-guides.com NOTE: The gas pressures specified below refer to NOTE: Do not apply soap solution to pilot filter screen or pressures taken at the pressure tap on the gas inlet pilot orifice area. If you have a leak, shut off the gas. After pipe just above the regulator (See Fig 4). -
Page 10: Safety Before Lighting The Pilot
All manuals and user guides at all-guides.com If control button(s) are jammed, close the gas supply and Connecting the pressure relief valve (PRV) call a qualified service technician. Attempted forceful repair A listed pressure relief valve supplied with the heater must may result in a fire or explosion. -
Page 11: Trouble Shooting
All manuals and user guides at all-guides.com toward you and lift up and out. THE FOLLOWING To access the pilot orifice, remove 2 screws holding pilot OPERATIONS SHOULD BE PERFORMED BY A assembly in place. Then loosen compression fittings to QUALIFIED SERVICE PERSON: expose pilot orifice. - Page 12 All manuals and user guides at all-guides.com C. Gas regulator may be shut or damaged. Tighten the thermocouple nut snugly but not too tight. 2. In-line AquaStar gas regulator jammed (usually on 4. Poor circuit connections at the ECO. (Energy Cut- LP gas) Off overheat protection) Replace or unlock the regulator.
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Page 13: Water Is Too Hot
All manuals and user guides at all-guides.com 6. Crossover in household plumbing WATER IS TOO HOT The AquaStar burner activates when there is sufficient water pressure drop in the AquaStar water valve assembly — ie. 1. Gas flow is higher than necessary. when a hot water faucet is opened. - Page 14 All manuals and user guides at all-guides.com HOT WATER TEMPERATURE FLUCTUATES 1. Cold water is mixing with the hot water between the AquaStar and the outlet (if not being used with a circulator pump) See #5 under “Burners do Not Ignite When Hot Water Turned On”.
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Page 15: Diagram Of Aquastar
All manuals and user guides at all-guides.com Fig. 10 - Diagram of AquaStar 125 BL Gas control slide Heat exchanger Piezo igniter Pilot assembly Location of pressure tap Burner manifold gas nipple pressure test nipple Water valve Pilot gas tubing Gas inlet gas pressure Main gas burner test nipple... -
Page 16: Components And Parts List
All manuals and user guides at all-guides.com Fig. 11 - INTERIOR COMPONENTS DIAGRAM AND PARTS LIST... - Page 17 All manuals and user guides at all-guides.com Fig. 11 INTERIOR COMPONENTS DIAGRAM AND PARTS LIST 125BL Cover ¤ 8 705 421 031 Cap cover ¤ 8 703 304 011 Water connection gasket ¤ 8 710 103 043 Draft divertor ¤ 8 705 505 354 Heat exchanger ¤...
- Page 18 All manuals and user guides at all-guides.com...
- Page 19 All manuals and user guides at all-guides.com...
- Page 20 All manuals and user guides at all-guides.com INSTALLATION CHECKLIST GAS LINE SIZE Natural Gas Nominal Iron Pipe Size* 1/2" 3/4" 1" 150' MAXIMUM LENGTH Liquid Propane Semi-rigid Tubing 1/2" 5/8" 3/4" 7/8" 150' MAXIMUM LENGTH RECOMMENDED * Flex tubing greatly reduces capacity and, therefore, is not recommended. Minimum Vent Size* and Height Minimum Diameter Minimum Height**...
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