C7089U OUTDOOR SENSOR
Fig. 1. Typical locations for outdoor sensor.
Wiring
CAUTION
Electrical Interference (Noise) Hazard.
Can cause erratic system operation.
Keep wiring at least one foot away from large
inductive loads such as motors, line starters,
lighting ballasts and large power distribution
panels.
Use shielded cable to reduce interference when
rerouting is not possible.
IMPORTANT
Erratic temperature readings from a sensor
can occur as a result of any of the wiring
practices described below. Avoid these
practices to assure correct operation. Use
shielded cable to reduce interference if
rerouting of sensor wiring is not possible.
— Be sure wires have a cable separate from the
thermostat cable.
— Do not route temperature sensor wiring with
building power wiring, next to control
contactors or near light dimming circuits,
electric motors or welding equipment.
— Avoid poor wiring connections.
— Avoid intermittent or missing building earth
ground.
69-1709EFS—03
Wiring must comply with applicable codes, ordinances
and regulations:
1. Wire the C7089U Outdoor Sensor to the
2. Mount C7089U in its mounting clip.
3. Plug wiring hole using nonhardening caulk or
M7514
1
2
2
CAUTION
Electrical Shock Hazard.
Can cause electrical shock or equipment
damage.
Disconnect power supply before connecting
wiring.
appropriate S terminals on the thermostat or
compatible device. If leadwire provided with
C7089U is not long enough (60 in.), run a cable
to a hole at C7089U location.
a. Using color-coded, 18-gauge thermostat
wire is recommended. For example of general
wiring of C7089U, see Fig. 2.
b. Pigtail wiring can be used.
putty.
1
C7089
USE APPROPRIATE MOUNTING MEANS FOR THE
TYPE OF STRUCTURE.
PLUG WIRING HOLE WITH NON-HARDENING CAULK
OR PUTTY.
Fig. 2. Wiring C7089U Outdoor Sensor to
thermostat.
WIRING HOLE
THROUGH
2
STRUCTURE
M19970