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Accessories for pressure switch
Klima-Set (Duct mounting kit)
Replacement cover
Mounting plaste (plastic)
Mounting bracket (plastic)
120 VAC light mounting set (orange)
120 VAC light only
24 VDC/VAC light mounting set (orange)
120 VAC light (green)
Replacement conduit adapter
DIN connector
Order No.
217-897
228-732
230-301 (recommended mounting bracket)
230-273 (optional mounting bracket)
231-772
244-156 (for switches with kit 231-772 already installed)
231-774
248-240 (for switches with kit 231-772 already installed)
231-944
210-318
ACCESSORIES AND REPLACEMENT PARTS
MAINTENANCE
Annually check the switch for proper operation
Set Point Calibration
Connect a meter capable or reading +/- 0 ohms to the •
NC and COM contacts.
Measure the resistance across the NC and COM con-•
tacts. If the resistance is more than 1 ohm, the switch
switch should be replaced, since this indicates that the
switch contacts are starting to either corrode or carbon-
izing.
Apply appressure to the + air pressure connection, and •
confirm that the NC contact breaks when pressure rises
above the set point and that the NO contact makes. the
NC contact will make automatically when pressure falls
below the set point pressure.
Connect a meter capable or reading +/- 0 ohms to the •
NO and COM contacts.
Measure the resistance across the NO and COM con-•
tacts. If the resistance is more than 1 ohm, the switch
switch should be replaced, since this indicates that the
switch contacts are starting to either corrode or carbon-
izing.
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