Bosch AquaStar 125B LP Installation And Operating Instructions Manual
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Bosch AquaStar 125B LP Installation And Operating Instructions Manual

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INSTALLATION AND OPERATING INSTRUCTIONS FOR AUTOMATIC
INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND
LIQUEFIED PETROLEUM GAS
MODEL 125B LP and 125B NG (Flow Modulated)
Not approved for space heating purposes
WARNING
All manuals and user guides at all-guides.com
Suitable for heating potable water only
WARNING
FOR YOUR SAFETY
WHAT TO DO IF YOU SMELL GAS
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Summary of Contents for Bosch AquaStar 125B LP

  • Page 1 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 LP and 125B NG (Flow Modulated) Suitable for heating potable water only Not approved for space heating purposes WARNING FOR YOUR SAFETY WHAT TO DO IF YOU SMELL GAS...
  • Page 2 All manuals and user guides at all-guides.com FEATURES UNPACKING THE AQUASTAR HEATER...
  • Page 3 All manuals and user guides at all-guides.com MINIMUM INSTALLATION CLEARANCES FROM COMBUSTIBLE AND NON COMBUSTIBLE MATERIALS FOR ALCOVE OR CLOSET INSTALLATIONS MODEL 125B / 125B LOW PRESSURE / 125B SOLAR / 125X TOP (A) 12" FRONT (B) 4" BACK 0" SIDES 4"...

  • Page 4: General Rules To Follow For Safe Operation

    All manuals and user guides at all-guides.com GENERAL RULES TO FOLLOW PROPER LOCATION FOR INSTALLING FOR SAFE OPERATION YOUR HEATER...

  • Page 5: Combustion Air Requirements

    All manuals and user guides at all-guides.com COMBUSTION AIR REQUIREMENTS CLEARANCES MOUNTING INSTALLATION...
  • Page 6 All manuals and user guides at all-guides.com Before installing the unit, be certain you have the correct heater for your type of Gas – Propane or Natural Gas. Identification labels are found on the shipping box, and on the rating plate which is located on the right side panel of VENTING...
  • Page 7 All manuals and user guides at all-guides.com 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 LINE SIZING GAS CONNECTIONS and Gas Regulator...

  • Page 8: Water Connections

    All manuals and user guides at all-guides.com WATER CONNECTIONS FOR YOUR SAFETY READ BEFORE LIGHTING THE PILOT SWEATED ASSEMBLY THREADED ASSEMBLY 1/2” ELBOW 1/2” ELBOW S FITTING S FITTING S FITTING PIPE PRV TO PIPE PRV TO APPROPRIATE APPROPRIATE DISCHARGE DISCHARGE...

  • Page 9: Lighting Instructions

    All manuals and user guides at all-guides.com LIGHTING INSTRUCTIONS MAINTENANCE AND SERVICE SETTING THE WATER TEMPERATURE...

  • Page 10: Troubleshooting

    All manuals and user guides at all-guides.com TROUBLE SHOOTING The AquaStar 125 burners are activated by a water flow valve. Numerous water related problems can cause this water valve to malfunction such as: Insufficient water flow volume to activate the burners at its minimum flow requirement;...
  • Page 11 All manuals and user guides at all-guides.com...
  • Page 12 All manuals and user guides at all-guides.com It is extremely important for a tankless instantaneous water heater to have the right size gas line to obtain the correct gas pressure Any sign of moisture or corrosion at the joint of the water valve and the gas valve is a sign that the water valve assembly components need to be replaced immediately Do not...
  • Page 13 All manuals and user guides at all-guides.com Diagram of AquaStar 125 B...

  • Page 14: Interior Components Diagram And Parts List

    All manuals and user guides at all-guides.com - INTERIOR COMPONENTS DIAGRAM AND PARTS LIST...
  • Page 15 All manuals and user guides at all-guides.com INTERIOR COMPONENTS DIAGRAM AND PARTS LIST 125B...

  • Page 16: Installation Checklist

    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" 10’ 40’ 150’ MAXIMUM LENGTH Liquid Propane Semi-rigid Tubing 1/2" 5/8" 3/4" 7/8" 20’ 60’ 150’ MAXIMUM LENGTH RECOMMENDED * Flex tubing greatly reduces capacity and, therefore, is not recommended.

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Aquastar 125b ng

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