Bosch 250 SXO NG - Manual (Page 15)

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Appliance details
15
2.13 For your safety read before
operating your water heater
A. This appliance is equipped with electronic ignition for
lighting the main burners. When turning the heater on,
follow these instructions exactly.
B. Before operating the unit, turn the On/Off switch to
the right position.
WHAT TO DO IF YOU SMELL GAS
B Do not try to light any appliance.
B Do not touch any electric switch; do not use any
phone in your building.
B Immediately call your gas supplier from a neighbors
phone. Follow the gas supplier’s instructions.
B If you cannot reach your gas supplier, call the fire
department.
C. Use only your hand to turn the on/off control switch.
Never use tools. Follow these instructions exactly. If
control switch is jammed, close the gas supply and call
a qualified service technician. Attempted forceful repair
may result in a fire or explosion.
D. Do not use this appliance if any part has been under
water. Immediately call a qualified service technician to
inspect the appliance and to replace any part of the
control system and any gas control which has been
under water.
2.14 Lighting and operating instructions
B 1. STOP! Read the previous safety information.
B 2. The gas valve must be shut off by putting the ON/
OFF switch to the OFF position (turn to the left
position). Wait five (5) minutes to clear out any gas.
If you smell gas, STOP! Follow “B” in the safety
information above. If you do not smell gas, go to the
next step.
B 3. This appliance is equipped with electronic ignition
for lighting the main burners. When turning the
heater on, follow these instructions exactly.
B 4. Set the ON/OFF switch to the ON position (turn to
the right position).
B 5. Open a hot water tap.
B 6. The burners will remain on until the hot water tap
is turned off.
When the heater is in operation you will hear its power
vent fan and burner operating. Upon turning off the hot
water flow the power vent fan will continue to operate
for up to 60 seconds to exhaust all flue gases. The
power vents fan speed is variable depending on the rate
of hot water used and the burner output.
TO TURN OFF GAS TO APPLIANCE
B Turn off the manual gas shut off valve on the supply
line to the heater and set the ON/OFF switch to the
OFF position (turn to the left position). Note: a
manual gas shut off valve is not supplied with the
heater.
Warning: If you do not follow these
instructions exactly, a fire or explosion
may result causing property damage,
personal injury or loss of life.
i
NOTE: on a first time initial
installation or after gas line work
has been done, air in the gas line
will cause ignition delay when the
hot water is turned on. This will
result in an error (EA or EC) on the
units display screen. This is
normal. When this occurs, leave
the hot water running and wait 3-5
seconds, then press reset button
to reset the unit (Fig. 19 , pos. 2).
Wait for (EA or EC) to disappear.
The heater will begin to attempt
ignition again, if the (EA or EC)
reappears then repeat this same
process until all air has been bled
from the gas line.