Honeywell C7650A Bedienungsanleitung
PRODUCT DATA
Copyright © 1996 Honeywell Inc. • All Rights Reserved
FEATURES
•Senses temperature of outdoor air.
• Long lasting thermistor sensing element is accurate
and stable over time.
•When temperature of outdoor air increases, the
outdoor air damper is closed to a preset minimum
position.
•When temperature of outdoor air is low, the outdoor
air damper is opened to reduce the cooling load in the
building.
•Provides 10 to 20 mA output signal to W7459 Solid
State Economizer Control; setpoint is located on solid
state economizer control.
•Sensor is enclosed in a rugged, corrosion-resistant
glass-fiber reinforced plastic case.
•Compact size and lightweight construction provide
easy mounting in HVAC rooftop unit.
GENERAL
C7650A Solid State Thermistor Sensor is used with the
W7459 Solid State Economizer Control Package. The W7459
Solid State Economizer Control Package is usually mounted
on an M7405/M7415 Actuator. It permits the use of outdoor
air as the first stage of cooling in heating, ventilating and air
conditioning (HVAC) systems. The application is for
differential or single temperature economizer control on
HVAC equipment up to approximately 20 tons.
C7650A
Solid State Temperature Sensor
Contents
General ............................................................................... 1
Features .............................................................................. 1
Specifications ...................................................................... 2
Ordering Information ........................................................... 2
Installation ........................................................................... 2
Operation ............................................................................ 3
63-2499-1
C7650A SOLID STATE TEMPERATURE SENSOR
63-2499—1 2
SPECIFICATIONS
Model:
C7650A Solid State Temperature Sensor.
Case:
Duct mount.
Temperature Sensing Element:
Thermistor.
Output Signal:
10 to 20 mA current signal; increases from 10 mA to 20 mA
as temperature decreases.
Operating Ambient Temperature Range:
+40°F to +100°F (+4°C to +38°C).
Shipping Temperature Range:
-40°F to +150°F (-40°C to +66°C).
Maximum Power Consumption:
0.45 VA.
Supply Voltage:
15 to 23 Vdc.
Electrical Connections:
Two 1/4 in. (6.5 mm) quick connect terminals.
Approval:
Underwriters Laboratories Inc. Flammability Rating: UL94-5V.
Dimensions:
See Fig. 1.
M9096
S
+
9
16
(14) 7
8
3 (96)
5
16 (8)
5
32
3
(80)
3
4
2
(70)
1 (25)
7
32
(6)
Fig. 1. C7650A Thermistor Temperature Sensor
Dimensions in in. (mm).
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
ORDERING INFORMATION
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number.
If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:
1. Your local Home and Building Control Sales Office (check white pages of your phone directory).
2. Home and Building Control Customer Relations
Honeywell, 1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.
International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,
Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.
C7650A SOLID STATE TEMPERATURE SENSOR
63-2499—1
3
L1
(HOT)
L2
1
1
TR1
TR
+
+
+
5
2
4
T1
P1
SO
SR
1
3
T
P
S
620 OHM
RESISTOR
C7650A OUTDOOR
AIR TEMPERATURE
SENSOR
A
BC
D
TEMPERATURE
SETPOINT
OPEN
MINIMUM
POSITION
MINIMUM
POSITION
24 Vac
MIXED AIR
SENSOR
TR
TR1
TR
TR1
TR
TR1
SEE W7459 SPECIFICATIONS FOR ADDITIONAL
WIRING INFORMATION.
W7459 ECONOMIZER PACKAGE MOUNTED ON ACTUATOR
W7459 ECONOMIZER PACKAGE ACTUATOR
M7577
Fig. 2. Wiring Connections for C7650A Temperature Sensor.
CAUTION
1. Before beginning installation, disconnect power
supply to prevent electrical shock or equipment
damage.
2. When selecting the location, make sure the
sensor is not exposed to rain, snow, or direct
sunlight.
Location
The C7650A Temperature Sensor can be mounted in any
position; however, the sensor must be installed where it is
exposed to freely circulating air, but protected from rain and
direct sunlight.
The C7650A is designed to operate in 500 ft/min minimum
airflow.
Wiring
Disconnect power supply before beginning installation to
prevent electrical shock or equipment damage. All wiring
must comply with applicable codes and ordinances. Follow
the wiring information furnished by the equipment
manufacturer or refer to Fig. 2 for typical wiring hookups.
OPERATION
Control Dial Setting
Control setpoint scale is located on the W7459 Solid State
Economizer Control. Control points A, B, C, D are field
selectable; use A, B, C, D control points for temperature
sensing.
Operation
The C7650A Solid State Temperature Sensor is used with a
solid state economizer control and damper actuator to
proportion an outdoor air damper in a ventilation system.
When outdoor air temperature is higher than return air
temperature, the outdoor air damper closes to the minimum
position. When the outdoor air temperature and the return air
temperature are equal, the outdoor air damper proportions
open on a call for cooling.
The relationship between the C7650A output current and the
temperature is shown in Fig. 3.
Fig. 3. C7650A Temperature Sensor Output Current.
40 45 50 55 60 65 70 75 80 85 90 95 100
19
18
17
16
15
14
13
12
11
10
9
LED OFF
LED OFF
LED OFF
LED OFF
LED ON
LED ON
LED ON
LED ON
D
C
B
A
mA
DEGREES FAHRENHEIT
NOTE: A,B,C,D ARE W7459A SWITCHING SETPOINTS. M7578A
C7650A SOLID STATE TEMPERATURE SENSOR
63-2499—1 4
Honeywell Europe S.A.
3 Avenue du Bourget
B-1140 Brussels Belgium
Honeywell Asia Pacific Inc.
Room 3213-3225
Sun Hung Kai Centre
No. 30 Harbour Road
Wanchai
Hong Kong
Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 2C9
Honeywell Latin American Division
Miami Lakes Headquarters
14505 Commerce Way Suite 500
Miami Lakes FL 33016
Helping You Control Your World®
63-2499—1 G.H. Rev. 12-96 Printed in U.S.A.
Home and Building Control
Honeywell Inc.
Honeywell Plaza
P.O. Box 524
Minneapolis MN 55408-0524
www.honeywell.com/building/components
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