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TEMPERATURE PROBES
Connecting the Probes
1
The controller is supplied with two temperature probes. Using two probes
allows obtaining a more accurate temperature reading and a faster reac-
tion time. Refer to the wiring diagram to connect the probes.
CAUTION: Probes operate at low voltage and are isolated from the supply.
Be sure that probe cables remain insulated from all high voltage sources.
In particular, do not route the probe cables through the same electrical
knockout as other cables. Do not connect the shield from the probe cable
to a terminal or a ground.
Switch # 3 activates the additional probe connected to
input # 2. Set the switch #3 to ON if the additional
probe 2 is used.
Extending the Probes
2
Each probe can be extended up to 500 feet (150 meters). To extend a probe:
Use a shielded cable of outside diameter between 0.245 and 0.260 in
(6.22 and 6.60 mm) (the cable dimensions should not be under 18 AWG)
to ensure the cable entry is liquid tight. Do not ground the shielding.
It is preferable to solder the cable joint to ensure a proper contact
between the two cables.
CAUTION: Do not run probe cables next to other power cables. When
crossing over other cables, cross at 90°.
SMART THERMOSTAT
SMART THERMOSTAT rev.01
ON
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