White Rodgers 770-1 Dual Purpose Air Switch Catalog Page

White Rodgers Heaters Catalog Page - 770-1 Dual Purpose Air Switch.
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Electrical Ratings 

 

Model 

Adjustable 

Switch 

 Resistive (Non-Inductive) 

  Number 

Operating Range 

Action 

120 VAC 

240 VAC 

277 VAC  125-277 VAC

 

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

DUAL PURPOSE AIR SWITCH

Responds to Positive, Negative or Differential Air Pressure

FEATURES
•Designeliminates“fluttering”ormalfunctionduetoshockorvibrationnormally

  encountered with “sail switches.”

•Wideoperatingrange.

•Furnishedwithone12” piece 1/4”O.D.flexibletubing,nutsandferrules.

•Canbemountedinanypositionexceptupsidedown.

•Encloseddiaphragm.

SPECIFICATIONS
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

770-1

AIR SWITCH APPLICATIONS

ELECTRONIC AIR CLEANERS

Switch permits power to cleaner whenever

blower of system is operating.

PROCESS DRYING

Switch monitors negative pressure to stop

conveyor or process and provides alarm

signalonfanfailure.Idealforbulk

chemicals, food processing, grain drying.

POWER HUMIDIFIERS

Switch permits unit to operate whenever

there is proper air movement.

NATURAL DRAFT BURNERS

Switchsignalsinsufficientdraft,provides

safetylimittostopfiringonlackofdraft,

startsagainonsufficientdraft.

REFRIGERATION EQUIPMENT

Switch responds to pressure drop across

refrigeration coils to signal alarm condition

or automatically initiate or terminate

defrost cycle.

INDUCED DRAFT BURNERS

Proves operation of I.D. fan by sampling

draftorairflow.Shutsofffiringequipment

on fan failure.

DUCT STRIP HEATERS

Switch proves air movement across

heaters by positive pressure to prevent

burn-outoninsufficientairflow.

DUAL PURPOSE

AIR SWITCH

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

www.white-rodgers.com

72

HEA

TING

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