A.O. Smith 100 Series, Руководство по обслуживанию

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Servicing should only be performed by a Qualified Service Agent
TROUBLESHOOTING
The Control System performs exhaustive self diagnostics and displays detected fault conditions in plain English errors/fault messages
on the Display System when there is a problem. When the Control System declares a fault condition it will “lock out” and disable
boiler/water heater operation.
POOR COMBUSTION - IGNITION FAILURE - ROUGH START/OPERATION
• Ensure the correct type of fuel gas, natural gas or propane, is supplied to the boiler/water heater., see the boiler/water heater's
rating label.
• Check supply gas and manifold pressure.
• Inspect the Burner for debris or damage.
If the high and/or low fire CO2 combustion readings are not in accordance with Table 7 on Page 36 and Table 8 on Page 37, or the
CO readings are high, or if the boiler/water heater is experiencing ignition failure or rough starting/operation perform the following
procedures:
ADEQUATE COMBUSTION AIR - PROPER VENTING
Combustion Air:
Carefully review the requirements for combustion and ventilation air in the Instruction Manual that came
with the boiler/water heater. Ensure there is an adequate supply of fresh air for combustion and the boiler/water heater is vented
properly. Do not overlook this step. Lack of combustion air and improper venting is often the root cause for poor combustion,
ignition failure and Control System lock out. Ensure all air requirements listed in the Instruction Manual that came with the boiler/
water heater have been observed and followed.
Direct Vent Installations:
If the boiler/water heater is using outdoor air for combustion (direct vent) ensure the intake air
or the vent pipe is not restricted and neither has exceeded the maximum equivalent feet or maximum number of elbow limitations
given in the Instruction Manual that came with the boiler/water heater. Ensure the specified (check parts list) vent and intake
air termination fittings have been installed. The factory supplied terminations are critical, failure to install required vent system
components will result in operation problems.
If the boiler/water heater is in an equipment room with a door to the outdoors, temporarily disconnect the intake air pipe and prop
open the equipment room door. Take combustion readings again to see if this corrects the problem. If the combustion readings
improve with the intake air pipe disconnected, the intake air pipe is either restricted or has too many equivalent feet or too many
elbows installed.
Conventional Vent Installations:
If the boiler/water heater is using room air for combustion (conventional vent) ensure the
vent pipe is not restricted and has not exceeded the maximum equivalent feet or maximum number of elbow limitations given in the
Instruction Manual that came with the boiler/water heater. Ensure the specified (check parts list) vent termination fitting has been
installed. The required termination are critical, failure to install required vent system components will result in operation problems.
Ensure the fresh air openings in the equipment room are adequately sized for the combined input Btu/hr rating of all conventionally
vented fuel burning appliances in the room. If the boiler/water heater is in an equipment room with a door to the outdoors - prop
open the equipment room door. Take combustion readings again to see if this corrects the problem. If the combustion readings
improve with the door open the fresh air openings may be undersized, refer to Air Requirements in the Instruction Manual to correct
the problem.
Service Note
If the Instruction Manual that came with the boiler/water heater is not on hand or there is any questions regarding the Air Requirements
or Venting instructions; call the toll free support phone number on the back cover of this manual for further assistance. Costs to
correct installation errors are not covered under the limited warranty.
VENT GAS RECIRCULATION
Vent gases recirculating from the vent termination into the intake air termination on direct vent installations is a serious installation
problem that MUST BE corrected. It will cause poor combustion, high Carbon Monoxide (CO) levels, delayed ignition, rough starting/
operation and ignition failure. Costs to correct installation errors are not covered under the limited warranty.
Vent and intake air terminations on direct vent installations may be allowing the recirculation of vent gases to the intake air pipe.
Ensure both terminations on direct vent installations have been installed with adequate clearances. See the Instruction Manual that
came with the boiler/water heater for venting instructions and vent/intake air termination clearance requirements.