The burner may best be cleaned by immersing the burner port
area in a solution of dishwashing detergent and hot water.
Allow the burner to remain in the solution for a short period of
time to loosen dust, dirt and oil or grease laden contaminants.
Rinse the burner thoroughly with clean water to remove any
residue from the detergent cleaner. The burner should be air
dried after removal from the cleaning solution and rinsing. DO
NOT use chlorine based solvents or cleaning agents.
9.5 – Check the Condensate Neutralizer –6 Months
Neutralizer medium is expected to last approximately three to six
months depending on the amount of condensate produced.
Condensate Produced, USgal/h = [KBtu/h Input / 100]
In higher temperature systems less condensate will be produced,
extending the life of the neutralizer media. Media viability can be
verified with pH test strips (i.e. litmus paper). Replace media as
needed to maintain neutral state of discharged condensate, as
required by code.
9.6 – Draining and Flushing – Annual
It is recommended that the water heater tank be drained and
flushed annually to reduce sediment buildup. The water heater
should be drained if being shut down during freezing
temperatures.
9.7 – Complete the Service
Update the appliance service records immediately upon
completing service.
Restore electrical power and gas supply to appliance.
Cycle unit and check for proper operation. At minimum the
following parameters should be checked to verify they fall
within acceptable limits. Deviation from the readings made
during commissioning can also indicate a problem that is
otherwise undetectable.
o Verify all combustion settings, including incoming gas
pressure, differential air pressure, and CO
2
settings (see
Section 8).
o Visually inspect burner flame to verify combustion.
Confirm proper operation of all safety devices.
Check for gas leaks and proper vent operation.
Check control settings.
Install top cover once all checks and adjustment are
complete.
9.8 – Troubleshooting
• Verify that all air has been purged from gas line
• Inspect hot surface igniter and related wiring for damage and connection errors.
• Inspect flame sensor and associated wiring. Replace if necessary
• Verify that water heater is properly grounded
• Verify incoming gas supply pressure and that it coincides with Table 9.
• Verify that the gas line connections to the water heater are adequate
• Verify that the vent/ air inlet piping (if equipped) are correctly installed and
obstructions are not present
• Verify that 24 VAC is being supplied to the gas valve during ignition. If a signal
cannot be detected, the transformer needs to be replaced
• Inspect the burner. Refer to Burner Maintenance in section 9.7
• Replace the VTech Controller if necessary
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