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Series S Solid-State Staging Controller Instruction Manual
NEMA size 2 will operate with standard fuses. NEMA
3 and 4 contactors may require slow blow fuses,
depending on the manufacturer. NEMA 6, 7, and
8 are similar to the small contactors because they
have internal pilot contactors.
If a fuse blows, check the contactor and contactor
wiring for shorts before operating the controller. The
controller cannot cause the fuses to blow.
Section 3 Options
3.1
Thermistor Input – 'B' Option
When the 'B' put module is added to the staging
controller, the controller becomes a simple non-
indicating temperature controller. connect the
Thermistor probe to points A & B and connect the
setpoint pot to points C, D, and E. The leads can be
extended using conventional copper wire. Available
ranges are 50-180ºF (5006), 100-200ºF (5006), and
140- 250ºF (5008). The controller is failsafe to both
open and shorted probes.
To quickly check the controller, connect a test resistor
(1000 to 10,000 ohms) across points A & B to
simulate the probe. Turn the setpoint fully clockwise
(high temperature). All steps should come on. If all
steps do not turn on, slowly turn the span adjustment
on the yellow board clockwise until all steps turn on
(allow 1 minute per step).
Short terminals A & B and all heating stages will turn
off (cooling stages will turn on). Connect probe and
energize system.
12
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