Bosch 125HX LP - 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.
FEATURING: Automatic Variable Power Modulating Gas
Valve and power generated Electronic Ignition
INSTALLATION AND OPERATING INSTRUCTIONS FOR AUTOMATIC
INSTANTANEOUS TYPE WATER HEATERS FOR USE WITH NATURAL AND
LIQUEFIED PETROLEUM GAS
MODEL 125HX LP and 125HX NG
(Flow Modulated with Electronic Ignition)
Suitable for heating potable water only
Not approved for space heating purposes
Intended for variable flow applications with steady cold water inlet temperatures.
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.
Specifications .................................................... Page 2
Rules for safe operation .................................... Page 4
Locating the Heater ............................................ Page 4
Combustion Air Requirements ............................ Page 5
Mounting the Heater ........................................... Page 5
Venting the Heater ............................................. Page 6
Gas Connections ............................................... Page 7
Gas Piping ......................................................... Page 8
Water Connections ............................................ Page 9
Safety before turning on the heater ..................... Page 9
Operating instructions ...................................... Page 10
Setting water temperature ................................ Page 10
Maintenance & Service ...................................... Page 11
Trouble Shooting ............................................... Page 11
Electrical Diagram ............................................ Page 13
Diagram of AquaStar ......................................... Page 14
Interior components diagram ............................ Page 16
Parts List ......................................................... Page 17
TABLE OF CONTENTS
6 720 606 562 (02.03)
A
L