B) DIRECT VENT MODELS
Check air shutter on the
burner tube (venturi).
Make sure there are no leaks
in the venting system.
Make sure the unit is not recirculating flue products.
Make sure the gas pressure is correct for fuel being used.
Make sure the orifice size is the same as the rating plate.
Add a vent restrictor ring.
SEE OWNERS MANUAL.
Adjust air shutter.
Close until flame sits onto
the burner ports.
Seal exhaust tube with high
temperature silicone. Also make sure that combustion air pipe is sealed.
Check flue for blockage or
high wind situations.
Use a manometer to check
gas outlet (manifold)
pressure.
SEE PAGE 5 FIGURE 7.
Correct if necessary.
Only if necessary.
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