A.O. Smith Cyclone XL 100 Series, Руководство по обслуживанию

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INSTALLATION CHECK LIST INSTALLATION CHECK LIST
The list below represents some of the most critical installation requirements that, when overlooked, often result in operational problems,
down time and needless parts replacement. Before performing any troubleshooting procedures use the list below to check for
installation errors. Costs to correct installation errors are not covered under the limited warranty. Ensure all installation requirements
and instructions contained in the Instruction Manual that came with the water heater have been observed and followed.
See
Fault and Alert Codes
(page 10) for service procedures relating to the fault conditions mentioned below.
1. The vent (exhaust) pipe must not be combined or connected to any other appliance’s vent system or chimney.
2. The intake air pipe must not be combined or connected to any other appliance’s intake air piping.
3. The water heaters covered in this Service Handbook are condensing appliances. Condensate will form in the vent pipe during normal
operation, condensate can also form in the intake air piping in certain circumstances. Ensure the intake air and/or vent piping is not
installed in a manner that will allow water to be trapped in the piping. Install a condensate tee in the intake air and/or vent piping.
Condensate trapped in the intake air and/ or vent piping will lead to
Blocked Exhaust
and/or
Blocked Air Intake
fault conditions and
Control System lock outs.
4. Ensure the intake air and/or vent piping is the correct size for the installed length. See the venting requirements section in the
Instruction Manual that came with the water heater. Using smaller pipe than is required will lead to
Blocked Exhaust
and/or
Blocked
Air Intake fault conditions and Control System lock outs.
5. Ensure the intake air and/or vent piping are within the maximum equivalent lengths required in the Instruction Manual that came with
the water heater. Exceeding the maximum length or number of elbows allowed will also lead to Blocked Exhaust and/or Blocked Air
Intake fault conditions and Control System lock outs.
6. The metal condensate elbow supplied with the water heater has a built in water trap; thus it is not necessary to form another water trap.
Condensate drain blockage will cause the exhaust elbow to fill with water and lead to Blocked Exhaust fault conditions and Control
System lock outs.
7. Ensure the vent and intake air terminations have adequate clearances from each other and the terminations of other appliances.
Failure to maintain adequate clearances can cause the recirculation of flue gases between the vent and intake air piping. Recirculation
of flue gases will cause poor combustion, sooting, ignition failure, rough starts, rough operation, premature failure of the heat
exchanger and icing of the combustion air intake during severe cold weather.
8. Direct vent terminations being installed in dead air spaces such as alleys, atriums, and inside corners can also cause the recirculation
of flue gases between the vent and intake air piping. To prevent the recirculation of flue gases, maintain as much distance as possible
between the intake air and vent terminations.
9. Ensure the screens in the factory supplied terminations are securely installed to prevent blockage in the intake air and/or vent piping.
10. On Direct Vent installations ensure the screen at the intake air connection on the water heater was removed before the intake air piping
was connected. See
Intake Air Connection
(page 25).
11. Ensure the water heater is properly grounded. The water heater Control System requires an adequate earth ground for flame sensing
(verification), see “Flame Sensing Operation” on page 15 . Inadequate grounding to the water heater and/or the Burner will cause the
Ignition Failure fault condition and Control System lock out. See
Electrical Connections – All Models
(page 26).