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BCS6000C-9
6. Install the stack temperature thermocouple in the dryer exhaust duct to sense exhaust
gas temperature. See Appendix G. for installation instructions.
7. Install a Hauck Rapid Response material temperature thermocouple in the material
discharge chute to sense the temperature of the material leaving the dryer. See
Appendix H. for recommended installation.
8. Connect the thermocouples to the appropriate terminals in the BCS control panel using
thermocouple cable of the same type as the Material and Stack thermocouples.
9. For a batch plant or parallel flow drum mix plant a pressure tap for the dryer draft
transmitter should be located in the 2 or 10 o’clock position on the dryer breech. Locate
the tap midway between the outer edge of the breeching and the outer edge of the
combustion chamber or shell. Cut a hole to accommodate a 1" (DN 25) pipe coupling
angled downward at approximately 30
° from horizontal. For a counter-flow drum mix
plant, the tube should be extended so that it ends near the nose of the burner.
10. Mount the draft transmitter on a vibration free support, shielded from direct flame
radiation. The operating temperature range is -20 to 180
°F (-29 to 82°C). Connect the
transmitter manifold to the LOW pressure tap and leave the HIGH pressure tap open to
atmosphere as a reference. The open tap must be shielded from wind and other
disturbances and should not be in a position where it can collect dirt or water. The
manifold moisture drain should be positioned vertically down.
11. Install the flame scanner(s) on the burner and wire them to the appropriate terminals in
the burner junction box. Reference burner instructions for scanner installation details.
12. Refer to the external component wiring diagram for interconnection between the burner
junction box and the BCS panel terminal strips.
13. Set the purge timer 1TR for the required purge time.
IMPORTANT
Thermocouple cables must be separated from AC power and control
wiring to avoid interference and nuisance shutdowns. Observe polarity
when making thermocouple connections. Regardless of thermocouple
type, the red wire is always negative.
IMPORTANT
The flame scanner, draft transmitter, and control motor position feedback
signals should be run in a separate harness from the burner junction box
to the BCS control panel. These cables may be run along with thermocouple
cables but must be separated from all other AC power and control wiring. If
shielded cable is used, only one end of the cable shield should be
grounded. Use one of the ground terminals in the BCS control panel for this
purpose.
IMPORTANT
Before igniting the burner, the dryer must be purged to remove possible
accumulation of combustible gases. A minimum of four complete air
changes must be supplied. Multiply the total system volume (dryer, baghouse
and exhaust ducts) in cubic feet (meters) by four. Divide this value by the burner
air capacity in cubic feet (meters) per minute. The result will be the required
purge time in minutes.
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