Bosch 125B NG User Manual
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 or gas fitter.
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 or gas fitter.
I N STALLATION AN D OPE RATING IN STR UCTION S FOR AUTOMATIC
INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND
LIQUEFIED PETROLEUM GAS
INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND
LIQUEFIED PETROLEUM GAS
MODEL 125B LP and 125B NG (Flow Modulated)
Suitable for heating potable water only
Not approved for space heating purposes
Intended for variable flow applications with steady cold water inlet temperatures 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.
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.
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
- 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.
Specifications ....................................... Page 2
Rules for safe operation ..................... Page 4
Locating the Heater ............................ Page 4
Combustion Air Requirements .......... Page 5
Mounting the Heater ........................... Page 6
Venting the Heater .............................. Page 7
Gas Connections .............................. Page 10
Water Connections ........................... Page 12
Safety before lighting the pilot ....... Page 12
Lighting instructions .......................... Page 13
Setting water temperature ............... Page 13
Maintenance & Service .................... Page 13
Trouble Shooting ................................ Page 14
Diagram of AquaStar ........................ Page 19
Components and Parts List ............ Page 20
Rules for safe operation ..................... Page 4
Locating the Heater ............................ Page 4
Combustion Air Requirements .......... Page 5
Mounting the Heater ........................... Page 6
Venting the Heater .............................. Page 7
Gas Connections .............................. Page 10
Water Connections ........................... Page 12
Safety before lighting the pilot ....... Page 12
Lighting instructions .......................... Page 13
Setting water temperature ............... Page 13
Maintenance & Service .................... Page 13
Trouble Shooting ................................ Page 14
Diagram of AquaStar ........................ Page 19
Components and Parts List ............ Page 20
TABLE OF CONTENTS
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