Honeywell TB7220 Manuale Utente

63-2635—03

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Mount the sensor where (see Fig. 24):

• cannot tamper with settings.

• there is good air circulation.

• it can measure true outdoor ambient temperature.

• surface is flat.

• wire distance between C7089U and thermostat is less than 

200 feet.

Do not mount the sensor:

• in direct sunlight.

• where hot or cold air blows on the sensor. Discharge line 

from an outdoor compressor unit, vent or fan causes 

inaccurate temperature readings.

• where snow, ice or debris can cover it.

Use the following steps to mount the sensor:

1. Remove the sensor from the mounting clip.

2. Mark the area on the location selected for mounting the 

sensor mounting clip.

3. Mount the clip.

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.

1. Wire C7089U Outdoor Sensor to S1and S2 terminals on 

the thermostat. If leadwire provided 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. 25.

2. Mount C7089U in its mounting clip.

3. Plug wiring hole using nonhardening caulk or putty.

Locate and mount the sensor in the same fashion as the 

thermostat. See the Select Thermostat Location section.

Consider the following as well:

1. Be sure wire distance between sensor and thermostat is 

less than 200 feet.

2. Mark the area on the wall selected for mounting the 

sensor or junction box.

3. Sensor wire must be separate from the thermostat cable.

4. Run wire cable to a hole at the selected wall location.

5. Pull approximately three inches of wire through the 

opening.

NOTE: Color-coded, 18-gauge wire is recommended.

M7514

1

2

2

1

USE APPROPRIATE MOUNTING MEANS FOR THE 

TYPE OF STRUCTURE.

PLUG WIRING HOLE WITH NON-HARDENING CAULK

OR PUTTY.

C7089

WIRING HOLE 

THROUGH 

STRUCTURE

M13664