Bosch aqua star 250sx ng User Manual
6 720 607 057
2
Index
Index
1
Warning
2
2
Appliance details
4
2.1
Features
4
2.2
250 SX Specifications (Technical data)
4
2.3
Dimensions and Minimum installation clearances
6
2.4
General rules to follow for safe operation
7
2.5
Proper location for installing your heater
7
2.6
Clearances
8
2.7
Mounting installation
8
2.8
Combustion air requirements
8
2.9
Venting
9
2.9.1
Venting options
11
2.10
Gas piping & connections
15
2.11
Gas line sizing
17
2.12
Measuring gas pressure
17
2.13
Water connections
18
2.14
Electrical connections
19
2.15
Operating instructions
19
2.16
For your safety read before operating your water heater 19
2.17
Lighting and operating instructions
19
3
Operation instructions
21
3.1
Power
21
3.2
Temperature selection
21
3.3
Use of remote control accessory
23
3.4
Operation
23
3.5
Reset button
23
3.6
Program button
23
3.7
Locked condition
23
4
Maintenance and service
24
5
Troubleshooting
24
6
Electrical diagram
27
7
250 SX Functional scheme
28
8
Interior components diagram and parts list
29
8.1
Interior components
29
8.2
Components diagram
30
8.3
Parts list
31
9
Special adjustment for measuring and adjusting CO
2
levels
32
9.1
Adjusting the unit
32
9.1.1
CO2 measuring port
32
9.1.2
Selecting adjustment mode
32
10
Protecting the environment
34
11
Twelve Year Limited Warranty
35
1
Warning
Featuring
Electronic Ignition and Power Venting
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.
Warning: If the information in this
manual is not followed exactly. A fire or
explosion may result causing property
damage, personal injury or death.
manual is not followed exactly. A fire or
explosion may result causing property
damage, personal injury or death.
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.
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.
Warning: Carefully plan where you
install the heater. Correct combustion
air supply and flue pipe installation are
very important. If a gas appliance is not
installed correctly, fatal accidents can
result from lack of air, carbon monoxide
poisoning or fire.
install the heater. Correct combustion
air supply and flue pipe installation are
very important. If a gas appliance is not
installed correctly, fatal accidents can
result from lack of air, carbon monoxide
poisoning or fire.
Warning: Exhaust gas must be vented
to outside using proper vent material
suitable for category III vent systems
and temperatures up to 480°F. Vent
and combustion air connector piping
must be sealed gas-tight to prevent
possibility of flue gas spillage, carbon
monoxide emissions and risk of fire,
resulting in severe personal injury or
death.
to outside using proper vent material
suitable for category III vent systems
and temperatures up to 480°F. Vent
and combustion air connector piping
must be sealed gas-tight to prevent
possibility of flue gas spillage, carbon
monoxide emissions and risk of fire,
resulting in severe personal injury or
death.
Warning: Place the heater in a location
where water leaks will do NO DAMAGE
to adjacent areas or lower floors.
where water leaks will do NO DAMAGE
to adjacent areas or lower floors.