Check Burner Flame - A.O. Smith 400 - 2100 Installation & Operation Manual

9
Maintenance
Perform start-up and checks
1. Start appliance and perform checks and tests specified
in Section 6 - Start-up of the Genesis Installation and
Operation Manual.
2. Verify cold fill pressure is correct and that operating
pressure does not go too high.

Check burner flame

Visually check main burner flames at each start-up after long
shutdown periods or at least every six months.
viewport is located on the burner mounting flange.
The area around the burner viewport is hot
WARNING
and direct contact could result in burns.
Figure 9-1_Flame Pattern Illustration
NORMAL
YELLOW FLAME
Normal Flame: A normal flame at 100% of burner input is
blue, with slight yellow tips, a well defined flame and no flame
lifting.
Yellow Tip: Yellow tipping can be caused by blockage or partial
obstruction of air flow to the burner.
Yellow Flames: Yellow flames can be caused by blockage of
primary air flow to the burner or excessive gas input. This
condition MUST be corrected immediately.
Lifting Flames: Lifting flames can be caused by over firing the
burner, excessive primary air or high draft.
If improper flame is observed, examine the venting system,
ensure proper gas supply and adequate supply of combustion
and ventilation air.
64
Check flue gas passageways
Any sign of soot around the inner jacket, outer jacket, flue
pipe connections, burner or in the areas between the fins on
the copper heat exchanger indicates a need for cleaning. The
following cleaning procedure must only be performed by a
qualified serviceman or installer. Proper service is required to
maintain safe operation. Properly installed and adjusted units
seldom need flue cleaning.
NOTICE
A burner
CAUTION
Inspect and clean burner
YELLOW TIP
1. Turn off main power to unit.
2. Turn off main manual gas shutoff to unit.
3. Remove the front outer jacket panels.
4. Disconnect manifold from gas train using union(s) just
below each gas valve(s).
FLAME LIFT
5. Remove mounting screws from manifold mounting
brackets. Pull the manifold/orifice assembly away from
burners. Repeat for each manifold assembly.
6. Remove two mounting screws from burner and slide
burner out toward front of unit. Use caution to prevent
damage to burners, refractory, hot surface igniter or wiring.
7. Remove soot from burners with a stiff bristle brush.
Dirt may be removed from burner ports by rinsing the
burner thoroughly with water. Drain and dry burners
before re-installing. Damaged burners must be replaced.
When installed in a dusty and dirty location, the burners may
require cleaning on a 3 to 6 month schedule or as needed, based
on severity of contamination. Contaminants can be drawn in
with the combustion air. Non combustible particulate matter
such as dust, dirt, concrete dust or dry wall dust can block
burner ports and cause non-warrantable failure. The standard
inlet air filter will help eliminate dust and dirt from entering
the unit. Use extreme care when operating a unit for temporary
heat during new construction. The burners could require a
thorough cleaning before the unit is placed in service.
Installation & Operation Manual
All gaskets/sealants on
components or jacket panels must be replaced
with new gaskets/sealants on reassembly.
Gasket and sealant kits are available from
your distributor.
When a Category IV vent system is
disconnected for any reason, the flue must
be reassembled and resealed according to the
vent manufacturer's instructions.
disassembled