White Rodgers 770-1 Dual Purpose Air Switch Catalog Page
Contents
1. DUAL PURPOSE White AIR SWITCH Rodgers DUAL PURPOSE AIR SWITCH Responds to Positive Negative or Differential Air Pressure FEATURES e Design eliminates fluttering or malfunction due to shock or vibration normally encountered with sail switches e Wide operating range e Furnished with one 12 piece 1 4 O D flexible tubing nuts and ferrules e Can be mounted in any position except upside down e Enclosed diaphragm Oo Zz lt Lu zE SPECIFICATIONS Ambient Temperature 40 to 180 F Maximum Pressure naana naa aana nn 1 2 PSI a AGENCY setetes doa nko e users ss ous U L listed and C S A approved 7 1 HP 125 VAC 6 1 8 Electrical Ratings 7 16 gt ia er Model Adjustable Resistive Non Inductive 1 5 16 1 7 16 Number Operating Range 120 VAC 240 VAC 277 VAC 125 277 VAC a ei 770 1 0 05 to 12 0 W C SPDT 15 0A 15 0A 15 0A 300 VA we 770 3 0 05 to 12 0 W C SPDT 15 0A 15 0A 15 0A 300 VA AIR SWITCH APPLICATIONS POWER HUMIDIFIERS Switch permits unit to operate whenever N Negative Pressure D Pressure Differential is there is proper air movement LEGEND P Positive Pressure po Pressure Sample Line ELECTRONIC AIR CLEANERS PROCESS DRYING Switch permits power to cleaner whenever Switch monitors negative pressure to stop blower of system is operating g t conveyor or process and provides alarm signal on fan failure Ideal for bulk chemicals food processing grai2. n drying NATURAL DRAFT BURNERS REFRIGERATION EQUIPMENT Switch signals insufficient draft provides Switch responds to pressure drop across safety limit to stop firing on lack of draft a refrigeration coils to signal alarm condition starts again on sufficient draft a or automatically initiate or terminate defrost cycle INDUCED DRAFT BURNERS DUCT STRIP HEATERS Proves operation of I D fan by sampling Switch proves air movement across draft or air flow Shuts off firing equipment A e heaters by positive pressure to prevent on fan failure F burn out on insufficient air flow ato Indicates Canadian Model Number call 1 800 305 6953 to order 72 www white rodgers com
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