B-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL
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20.4 Manifold and Controls
20.5 Burner
Manifold Periodically check gas control assembly and internal and external piping for
leaks. Relief vent lines to outdoors on gas controls should be checked to
ensure against blockage caused by insects or any other substance. Clean as
required.
All gas piping to the air handler must comply with the National Fuel Gas Code
- NFPA54, latest edition and all local codes. Verify gas soundness of each
SSOV (Safety Shut Off Valve). This test must be repeated after the first 100
hours of operation.
See Page 75, Figure 32 through Page 76, Figure 35.
Air Flow Switch An annual check of the tubes attached to the air flow switch should be made
to ensure against blockage caused by insects or any other substance. Clean
as required.
See Page 118, Section 19.4.
Electric Components Check for physical damage on any of the electric components and verify all
electrical connections are secure. Ensure equ ipment is properly grounded.
See Page 118, Section 19.3 and Page 132, Figure 86.
Temperature Sensors Calibrate space, outdoor air, and discharge air sensors as required.
See Page 118, Section 19.2.3.
An annual inspection of the burner and components must be made to ensu
re
proper and safe operation. For the most part, the burner is self cleaning.
However, if the application is extremely dirty or dusty, it may become neces-
sary to periodically clean the burner. Inspect and clean the burner in accor-
dance with the following recommended procedures:
1. To a void damaging the valves, disconnect the burner piping from the
manifold, at the union, and cover the exposed end of the manifold. See
Page 75, Figure 32 through Page 76, Figure 35.
2. Unscrew the UV scanner from the side of the burner and clean the lens
with a soft cloth. See Page 79, Section 17.5.4.
3. Remove the ignition cable from the igniter on the side of the burner, and
then remove the spark igniter. Clean the igniter contacts with a wire
brush. Set the gap to 0.078" (2.0 mm).
4. Inspect each of the stainless steel mixing plates to see that all of the air
holes are free of debris. Clean with a wire brush as necessary. See
Page 129, Figure 82 through Page 129, Figure 84.
5. The burner orifices may need to be drilled to unplug any closed orifices.
See Page 129, Figure 82 through Page 129, Figure 84. Use a pin vise
with the appropriate drill, See Page 129, Table 26, to clean debris from
the orifices. An electric drill is not suggested beca
use it is easy to snap
drill bits off in the orifices. See Page 75, Figure 32 through Page 76,
Figure 35.
6. Reinstall the UV scanner and the spark igniter. The UV scanner should
be installed only finger tight as over tightening can result in damaging
the lens. Reconnect the burner piping to the manifold at the union.
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