Mounting the Outdoor Sensor
Wiring the Outdoor Sensor
Remove
cover by slid-
ing upwards
away from
the base.
To wire from
the back,
remove the
knock-out in
the sensor
base.
S1
S1
If using
conduit,
remove the
flexible plug
from the base
bottom.
S1
S1
Attach the
base to the
wall, soffit
or electrical
box.
S1
S1
• The 070 can be mounted directly onto a wall with the
wiring entering through the back or bottom of the en-
closure. Do not mount the 070 with the conduit knock-
out facing upwards as rain could enter the enclosure
and damage the sensor.
• In order to prevent heat transmitted through the wall
from affecting the sensor reading, it may be necessary
to install an insulating barrier behind the enclosure.
• The 070 should be mounted on a wall which best rep-
resents the heat load on the building (a northern wall
for most buildings). The 070 should not be exposed to
heat sources such as ventilation or window openings.
• The 070 should be installed at an elevation above the
ground that will prevent accidental damage or tampering.
• Connect 18 AWG or similar wire to the two terminals
provided in the enclosure & run the wires from the
sensor to the control. Do not run the wires parallel to
telephone or power cables. If the sensor wires are lo-
cated in an area with strong sources of electromag-
netic interference (EMI), shielded cable or twisted pair
should be used or the wires can be run in a grounded
metal conduit. If using shielded cable, the shield wire
should be connected to the Com terminal on the con-
trol & not to earth ground.
• Replace the cover of the sensor enclosure.
• Connect the 2 wires from the outdoor sensor to the Out
and Com terminals on the 256 (2 and 3).
S1
S1
2
3
Com
Out
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© 2019 tekmar 256_D - 09/19
