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MST-1
2.4.1.2 - 230 VAC
Make certain that the line voltage selector switch is set
to 230 VAC.
Connect the power cable to terminals 3 and 4
on the main (bottom) board.
2.4.2 - Stage 1 (terminals 5 and 6)
Connect the two leads from Stage 1 to terminals 5 and 6
on the main (bottom) board.
2.5 TEMPERATURE PROBES
Temperature probes use a “Class 2” low voltage circuit.
These cables (#18AWG) can extend up to a distance of
500 feet (150 meters).
For probe longer than 10 feet
(3 meters), install shielded wire #18AWG min.
With the
shield grounded to ground of power source. Single probe
connections. Single temperature probe connections are
illustrated in Figure 3 while temperature averaging
connections are illustrated in Figure 4.
2.5.1 Single Temperature Probe
Install a single temperature probe in an area that best
reflects the overall temperature of the room. Connect the
two leads and the shield of the temperature probe to the
MST-1 terminals labelled “Probe” as indicated in Figure 3.
2.5.2 Averaging (optional)
Four temperature probes are required if temperature
averaging is desired in larger rooms. Place the probes in
appropriate locations to best average the ambient
temperature. Refer to Figure 4.
Use shielded cabling for probes when their cable paths
run parallel to high voltage wires. Connect the shields to
the ground of power source. Failure to do so may result
in inaccurate readings!
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