Not available for Iranian market
Series ANA Switches are specifically designed for OEM markets where customer-specified fixed set points between 0.05″ and 12.0″w.c. are required. ANA Switches are used to sense positive, negative, or differential air pressure. They are supplied with various sample line connections, terminal styles, and mounting arrangements.
GENERAL DESCRIPTION & OPERATION
The plated housing contains a diaphragm and a SPDT or SPST snap-acting switch.The switch operates on pressure rise or fall at desired set point. For additional application and technical information, please contact the sales office. Select a mounting location which is free from vibration. The ANA switch must be mounted with the diaphragm in any vertical plane in order to maintain the specified operating set point. Avoid mounting with the sample line connections in the “up” position.
MOUNTING (Fig. 1)
Select a mounting location which is free from vibration. The ANA switch must be mounted with the diaphragm in any vertical plane in order to maintain the specified operating set point. Avoid mounting with the sample line connections in the “up” position.
AIR SAMPLING CONNECTION (Fig. 2)
The ANA can be supplied with one or two sample line connections, situated on either side of the diaphragm. These connections are suitable for flexible or metallic tubing. Locate the sampling probe a minimum of 1.5 duct diameters downstream from the air source. Install the sampling probe as close to the center of the airstream as possible. Refer to Figure to identify the high pressure inlet (H) and the low pressure inlet (L). Select one of the five application options listed below, and connect the sample lines as recommended. Positive pressure only: Connect the sample line to inlet H; inlet L remains open to the atmosphere. Negative pressure only: Connect the sample line to inlet L; inlet H remains open to the atmosphere. Two Negative Samples: Connect the
higher negative sample to inlet L. Connect the lower negative sample to inlet H. Two Positive Samples: Connect the higher positive sample to inlet H. Connect the lower positive sample to inlet L. One Positive & One Negative Sample: Connect the positive sample to inlet H. Connect the negative sample to inlet L.
ELECTRICAL CONNECTIONS (Figs. 2 & 3)
Before pressure is applied to the diaphragm, the switch contacts will be in the normally closed (NC) position. Control and alarm functions are wired.
SERIES ANA AIR PRESSURE SENSING SWITCHES
0.05 + 0.02″w.c. to 12.0″ w.c.
Progressive, from 0.02″ ± 0.01″ w.c. at minimum set point, to approximately 0.8″ w.c. at maximum set point.
½ psi (0.03 bar).
300 VA pilot duty at 115 to 277 VAC; 15 amp noninductive; to 277 VAC, 60 Hz.
SPDT, SPST/NO or SPST/NC logic.
Electrical Connections: Complying with the latest NEMA standards.
Operating Temperature Range:
–40 to 180F (–40.0 to 82.2C).
Diaphragm in any vertical plane to obtain specified operating set point.
Sample Line Connectors: Per customer requirement, for flexible or metallic tubing.
UL, CSA, CE.