White Rodgers 770-1 Dual Purpose Air Switch Catalogue

 

770-1 

0.05 to 12.0 W.C. 

SPDT 

15.0A 

15.0A 

15.0A 

300 VA

 

770-3 

0.05 to 12.0 W.C. 

SPDT 

15.0A 

15.0A 

15.0A 

300 VA

Responds to Positive, Negative or Differential Air Pressure

• Design eliminates “fluttering” or malfunction due to shock or vibration normally

  encountered with “sail switches.”

• Wide operating range.

• Furnished with one 12” piece 

1

/

4

”

O.D. flexible tubing, nuts and ferrules.

• Can be mounted in any position except upside down.

• Enclosed diaphragm.

Ambient Temperature . . . . . . . . . . . . . . . .   -40 to +180°F

Maximum Pressure. . . . . . . . . . . . . . . . . .  

1

/

2

 PSI

Agency . . . . . . . . . . . . . . . . . . . . . . . . . . .   U.L. listed and C.S.A. approved

1

/

2

 HP @ 125 VAC



Switch permits power to cleaner whenever

blower of system is operating.

Switch monitors negative pressure to stop

conveyor or process and provides alarm

signal on fan failure. Ideal for bulk

chemicals, food processing, grain drying.

Switch permits unit to operate whenever

there is proper air movement.

Switch signals insufficient draft, provides

safety limit to stop firing on lack of draft,

starts again on sufficient draft.

Switch responds to pressure drop across

refrigeration coils to signal alarm condition

or automatically initiate or terminate

defrost cycle.

Proves operation of I.D. fan by sampling

draft or air flow. Shuts off firing equipment

on fan failure.

Switch proves air movement across

heaters by positive pressure to prevent

burn-out on insufficient air flow.

Indicates Canadian Model Number: call 1-800-305-6953 to order



72