Forney Corporation
UNIFLAME User’s Manual
Publication 372000-48 Rev H
3.1 GROUNDING AND SHIELDING TECHNIQUES
FOR USE ON DETECTORS OR DETECTOR CABLE LOCATED WITHIN 12 INCHES OF A HIGH
ENERGY OR HIGH VOLTAGE SOURCE.
1. The detector and cable (preferably in flexible conduit)
must
be located at least 12 inches from the
ignition source.
2. Run a ground wire from the ignition transformer chassis to the igniter assembly.
3. Replace all frayed, cracked, or dirty/oily ignition wires. Ignition wire must be in good working
condition.
4. Electrically isolate the detector from the burner using the surface mounting flange provided.
5. Attach drain wire of the detector cable to earth ground of power supply.
6. For remote communications
less than 200 feet
, connect drain wire of the communication cable to
earth ground of power supply.
Figure 7 – Connection for Less Than 200 Feet
7. For remote communications
greater than 200 feet
, connect drain wire of the communication cable to
earth ground of the RS485 source (e.g. IBM compatible computer).
Figure 8 – Connection for Greater Than 200 Feet
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