Honeywell C7089 User manual

Honeywell
C7089
OutdoorSensor
(USEWITHTH8000ANDTH7000THERMOSTATS)
APPLICATION
This C7089 Outdoor Sensor is used with theTH8000 and
TH7000 Thermostat families.
SPECIFICATIONS
Operating Ambient Temperature Range:
-40 to 120°F (-40 to 49°C).
Display Range:
-40 to 127°F (-40 to 53°C).
Sensor Accuracy:
+/-1.5°F at 70°F (+/-.84 at 21°C)
Operating Relative Humidity:
5% to 95% non-condensing.
Dimensions in in. (mm):
2-1/4 (57) x 3/8 (10) with 60 (1524) leadwires.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous condition.
2. Check the ratings given in the instructions end on
the product to make sure the product is suitable for
your application.
3. [ustaller must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
CAUTION
Electrical Shock Hazard.
Dan cause electrical shock or equipment
damage.
Disconnect power supply before connecting
wiring.
Locationand Mounting(Fig.1)
Mount the sensor where:
• cannot tamper with settings.
• there is good air circulation.
• it can measure true outdoor ambient temperature.
• surface is flat.
• wire distance between C7089 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.
MTS14
Fig. 1. Typical locations for outdoor sensor.
@U.S. Registered Trademark
Copyright © 2004 Honeywell International Inc. ° _ • All Rights Reserved 69-I709EFS

C7089OUTDOOR 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 widng
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.
CAUTION
Electrical Shock Hazard.
Can cause electrical shock or equipment
damage.
Disconnect power supply before connecting
wiring.
Wiring must comply with applicable codes, ordinances
and regulations:
1. Wire the C7089 Outdoor Sensor to $1 and $2
terminals on the thermostat. If leadwire provided
with C7089 is not long enough (60 in.), run a cable
to a hole at C7089 location.
a. Using color-coded, 18-gauge thermostat wire is
recommended. For example of general wiring
of C7089, see Fig. 2.
b. Pigtail wiring can be used.
2. Mount C7089 in its mounting clip.
3. Plug wiring hole using nonhardening caulk or putty.
WIRING HOLE
THROUGH
Z_STRUCTURE
z_USE APPROPRIATEMOUNTINGMEANS FORTHE
TYPE OFSTRUCTURE.
Z_ PLUGWIRING HOLEWITHNON-HARDENINGCAULK
ORPUTTY. M_997o
Fig. 2. Wiring C7089 Outdoor Sensor to thermostat.
69-1709EFS 2

OPERATION
Once installed and the Thermostat installer Setup
Number 8346 is set to 1 or 2, the outside temperature
can be displayed on the thermostat. See Fig. 3.
7
TUE
iC
Heat On
FoltowingSchedule
HE_ Outside
-t.I I_- _,, t-- t--I
rT-S t----!----I
M19971
Fig. 3. Outside temperature reading on
TH8000 Series Thermostat.
C7089 OUTDOOR SENSOR
The C7089 Outdoor Sensor converts outdoor ambient
temperature to a resistance that the thermostat can
interpret.
The C7089 has a negative temperarule coefficient (TC), which
llleans that lesistance decreases as
tile rempelature incleases. See Table 1
CHECKOUT
Allow C7089B Outdoor Sensor to absorb outdoor air for a
minimum of twenty minutes before taking a reading.
With an accurate thermometer (:t:l°F [O.5°C]) measure
the temperature at the sensor location, allowing time for
the thermometer to stabilize before reading.
To verify sensor resistance, remove one wire from one of
the C7089 60-in. leadwires. Use an ohmmeter to
measure the resistance across the sensor. Then verify
the sensor accuracy with the temperature/resistance in
Table 1.
CALIBRATION
The C7089 Ourdool Seilsor is caliblared at tile fucroly and can-
nor be recalibrated in tile field
-2O
-18
-16
-14
-12
-10
-8
-6
-4
-2
O
2
4
6
8
Table 1. Sensor Resistance
at Outdoor Temperature.
Outdoor Temperature
°F °C
-28.9
-27.8
-26.7
-25.6
-24.4
-23.3
-22.2
-21.1
-20.0
-18.9
-17.8
-16.7
-15.6
-14.4
-13.3
Ohms of
Resistance
106926
100923
95310
90058
85124
80485
76137
72060
68237
64631
61246
58066
55077
53358
49598
3 69-1709EFS

C7089OUTDOOR SENSOR
10
t2
14
16
t8
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
66
Table 1. Sensor Resistance
at Outdoor Temperature (Continued).
Outdoor Temperature
°F °C
-12.2
-11.1
-10.0
-8.9
-7.8
-6.7
-5.6
-4.4
-3.3
-2.2
-1.1
O.O
1.1
2.2
3.3
4.4
5.6
6.7
7.8
8.9
10.0
11.1
12.2
13.3
14.4
15.6
16.7
17.8
18.9
Ohms of
Resistance
47092
44732
42506
40394
38400
36519
34743
33063
31475
29975
28558
27219
25949
24749
23613
22537
21516
20546
19628
18754
17928
17136
16387
15675
14999
14358
13743
13161
12607
68
7O
72
74
76
78
8O
82
84
86
88
9O
92
94
96
98
100
t02
104
106
t08
110
112
114
116
t18
120
Table 1. Sensor Resistance
at Outdoor Temperature(Continued).
Outdoor Temperature
°F °C
20.0
21.1
22.2
23.3
24.4
25.8
26.7
27.8
28.9
30.0
31.1
32.2
33.3
34.4
35.6
36.7
37.8
38.9
40.0
41.1
42.2
43.3
44.4
45.6
46.7
47.8
48.9
Ohms of
Resistance
12081
11578
11100
10644
10210
9795
9398
9020
8659
8315
7986
7672
7372
7086
6813
6551
630t
6062
5834
5614
5404
5203
5010
4826
4649
4479
4317
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