Most of circuit breakers provide one trip-close-trip cycle. A delay time is necessary to return to the nominal state of the CB (for example, the spring that allows the circuit breaker to close should be fully charged). The state of the CB can be checked using an input assigned to the “CB FLT” function. If on completion of the “Ext CB Fail time” (tCFE), the “CB FLT” indicates a failed state of the CB, a lockout occur and the CB remains open.
Room Temperature Sensors
This unit is suitable for either drywall mounting or
junction box mounting. The room sensor is provided
with screw terminal blocks for all connections.
Remove the cover from the unit and mount the
housing base to the wall using the (2) 6/32” x 1”
machine screws. Replace the cover and tighten
down, using the (2) 1/16” Allen Screws located on
the bottom of the enclosure.
Duct and Duct Averaging Sensors
Duct temperature sensors - drill a 3/8” hole in the
duct and insert the probe through the hole until the
foam pad is tight to the duct. Now insert (2) screws
through the mounting holes in flange and tighten
them until the unit is held firmly to the duct. Duct
Averaging sensors - Drill a 3/8” hole in the duct and
insert the averaging element through the hole until
the foam pad is tight to the duct. Now insert the (2)
screws through the holes in the mounting flange
and tighten until the unit is held firmly to the duct.
The sensor should then be strung in a criss-cross
pattern throughout the duct using the mounting
clips provided, in a pattern that covers the greatest
surface area of the duct, to insure that there is no
stratification. When bending the copper tubing, be
careful that you use a gradual bend and that you DO
Not kink the copper tubing.
Immersion Temperature Sensors
The Fluid Immersion-type sensors are provided
with a 2 ½”, 4”, or 6 ¼” insertion length, 304 series
stainless steel thermowell. The thermowell has a
1/2” NPT external or process thread and a 1/2” NPS
Female process thread. Heat transfer compound
may be used but it is not necessary
