SOR Thermal Differential Flow Switch User Manual
Page 4
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Form 1024 (08.13) ©SOR Inc.
Remove the instrument enclosure lid by unscrewing in a counterclockwise direction.
Loosen the two, board-retaining captured screws.
Remove the printed circuit board by grasping the transformer on the center of the
board and, while rocking gently back and forth, pull firmly outward.
Connect power and alarm relay wiring to Terminal Block TBB as shown in .
Reinstall the switch electronics and tighten the retention screws.
Electrical Installation
NOTE: Connections to sensors are factory installed and should not be disconnected in the fi eld.
NOTE: For 24 VDC operation (factory prepared), connect +24 VDC to TBB7 and 24 VDC return to
TBB8. For 115 VAC or 230 VAC operation, there is no polarity.
NOTE: Connect ground wire to the ground screw located in back of instrument enclosure. A
ground wire must be attached to the ground screw located inside and on the back of
instrument head for proper operation.
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