37
Servicing should only be performed by a Qualified Service Technician
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 Warning Codes" beginning on Page 7 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" on Page 34.
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 24. 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" section on Page 35.
