White Rodgers 770-1 User Manual

Ensures unit operation with proper air movement.

Permits power to cleaner when system blower is operating.

Monitors negative pressure for process control and alarms.

Responds to pressure drop across coils for alarms/defrost.

Signals insufficient draft, stops firing on lack of draft.

Proves sufficient airflow before permitting gas valve to open.

Proves ID fan operation, shuts off firing on fan failure.

Proves air movement across heaters, prevents burn-out.

Proves blower operation for firing control and safety.

Explains symbols used for pressure types in diagrams.

Specifies voltage and amperage ratings for the switch.

Defines the pressure adjustment range from .05 to 12" w.c.

Specifies the size of the conduit opening.

Indicates that the set point is adjustable.

Specifies the ideal mounting orientation.

Defines the ambient temperature limits for operation.

Details the threaded connectors for sample lines.

Guides on how to mount the air switch vertically.

Outlines general wiring practices and codes.

Provides detailed instructions for connecting sample lines.

Illustrates probe placement for various airflow and pressure conditions.

Lists conversion factors for pressure units.

Explains how to adjust the operating range using the knob.

Provides physical dimensions and hole specifications for mounting.