The T6140A,B Remote Bulb Temperature Controller

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1 T640A,B Remote Bulb Temperature Controller The T640A,B Remote Bulb Temperature Controller is used as a unit mount temperature controller in electric heat, fan coil, room air conditioner applications, cold storage, refrigeration, heat pumps, heaters and other applications where low differentials and accurate sensing are required. Ambient compensation is not provided, so the thermostat must be located at normal ambient temperature, away from the sensing element. The device is used to control line voltage circuits. The T640 is an operating temperature control and not a limit control. In applications where high property value and/or occupant safety is important, a separate backup safety or limit control must be used. T640 Remote Bulb Temperature Controllers are unit mount thermostats, available as one-stage (T640A) and two-stage (T640B) models. Silver cadmium oxide switch contacts. Ambient temperature range of -40 F to +76 F (-40 C to +80 C), with maximum safe temperature exposure of F (00 C). Relative humidity rating of 5 to 95%, noncondensing. UL and CSA component approved. Fixed differential. Pilot duty electrical load rating of watts, with full load amperage (FLA) of 6A at 30 and 77 Vac and locked rotor amperage (LRA) of 60A at 30 and 77 Vac. Black knob and scale plate are optional. CONTENTS Specifications... Ordering Information... Installation... 3 Wiring... 4 Operation And Checkout... 5 G.R. -95 Honeywell Inc

2 T640A,B SPECIFICATIONS ORDERING INFORMATION MODELS: T640A: One stage with single pole double throw (spdt) switching action. Provides switching action that makes the line voltage control circuits between terminals 0 and on temperature rise and makes the circuit between terminals 0 and on temperature fall. T640B: Two stage with spdt switching action. Provides switching action that makes the line voltage control circuit between terminals 0 and on temperature rise and makes the circuits between terminals 0 and on temperature fall. TERMINALS: /4 in. (6 mm) brass quick connects. ELECTRICAL RATINGS: Voltage 0 Vac 30 Vac 77 Vac Full Load 6A 6A Locked Rotor 60A 60A Pilot Duty W ENVIRONMENTAL RATINGS: Ambient Temperature: -40 F to +76 F (-40 C to +80 C). Maximum Temperature: F (00 C). Relative Humidity: 5 to 95 percent, noncondensing. Specifications Shipping and Storage Temperature: -40 F to +76 F (-40 C to +80 C), 5 to 95 percent relative humidity, noncondensing. DESIGN LIFE: 00,000 cycles at rated load, using Honeywell Inc. K-Standard testing at 6 Full Load Amperes (FLA) and 60 Locked Rotor Amperes (LRA). 30,000 cycles UL rated at 0 FLA and 80 LRA. APPROVALS: Underwriters Laboratories Inc. Component Listed: File No. E CSA Approved: File No. LR8630. MOUNTING: Four tapped holes (6-3 NC) in the setpoint shaft face of the control. DIMENSIONS: See Fig.. ACCESSORIES: Bag Assembly, containing: Black knob Warmer/Cooler Plate Mounting screws 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, or specify. Order number.. Accessories, if desired. 3. Order additional system components and system accessories separately. If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:. Your local Home and Building Control Sales Office (please check the white pages of your phone directory).. Home and Building Control Customer Logistics Honeywell Inc., 885 Douglas Drive North Minneapolis, Minnesota In Canada Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario MV 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

3 T640A,B SPECIFICATIONS INSTALLATION Fig. T640 Remote Bulb Temperature Controller approximate dimensions in in. (mm). 3/8 (0) 3 4-/ (5) OR 3-9/3 (98) -3/3 (6) -5/6 (33) A B 5/8 (6) -/3 (7) 30 o 0 0 -/ (38) (5) -7/3 (3) 6-3 UNC DEPENDING ON RANGES. 3 3/8 IN. (0 MM) STANDARD, 7/6 IN. ( MM) OPTIONAL. SEE TABLE FOR CAPILLARY LENGHT. M8844 Installation WHEN INSTALLING THIS PRODUCT. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.. 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. CAUTION Disconnect power supply before beginning installation to prevent electrical shock or equipment damage. MOUNTING SENSING ELEMENTS Mount the remote bulb in the airflow or water supply where air or water of average temperature circulates around it. The bulb can be strapped to a water pipe using a05900 T-Clamp (see Fig. ) or as follows: Fig. Bulb strapped to water pipe with T-Clamp. T-CLAMP BULB CAPILLARY TUBING LOCATION AND MOUNTING T640 Thermostats mount either vertically or horizontally in equipment in an electrical control compartment. The remote bulb can be mounted as far from the controller as capillary tubing allows. SUPPLY WATER PIPE M

4 T640A,B INSTALLATION WIRING Fig. 3 Strap-on mounting of bulb on water pipe. APPROX. 3 FT (0.9 M) CAPILLARY TUBE BULB STRAPPED TO PIPE CAUTION DO NOT OVERTIGHTEN CLAMPS TO AVOID SENSOR BULB DISTORTION. OVERTIGHTENING CLAMPS MAY CAUSE A SIGNIFICANT SHIFT IN CALIBRATION. T640 BULB PIPE DUCT HANGER WIRE OR METAL HOSE CLAMPS. Secure remote bulb to pipe with duct hanger wire or metal hose clamps (Fig. 3).. Cover the bulb and pipe with foam rubber insulation extending at least six inches (5 mm) beyond both ends of the bulb (Fig. 3). 3. Secure foam rubber with duct tape. DO NOT ALLOW DUCT TAPE TO CONTACT PIPE. MOUNTING THERMOSTAT. Use the dimensions in Fig. to locate and drill holes in the cabinet or panel for the setpoint shaft and four mounting screws.. Fasten the case to the cabinet or panel through the mounting holes in the panel using the supplied screws. 3. Run the tubing to the sensing location by the shortest practical route. Do not sharply bend the tubing because flow can be restricted. Leave excess tubing coiled near the thermostat. 4. Make wiring connections according to the instructions in the Wiring section. 5. Replace the faceplate and tighten the mounting screw. FOAM TAPED OVER STRAPPED BULB (OPTIONAL) CAPILLARY TUBE FOAM RUBBER WRAP (EXTENDS 6 in. (5 mm) BEYOND ENDS OF SENSOR) PIPE DUCT TAPE M8835 Wiring CAUTION Disconnect power supply before connecting wiring to prevent electrical shock and equipment damage. All wiring must comply with local codes and ordinances. Wire the thermostat by referring to the wiring diagrams furnished with the system equipment and Fig. 4 through 7, as applicable

5 T640A,B WIRING OPERATION AND CHECKOUT Fig. 4 Typical hookup for T640B controlling a normally open valve on both heating and cooling cycles. SWITCH A T640 UNIT SWITCH B Fig. 5 Typical hookup for T640 with T603G,H changeover thermostat controlling a motorized or solenoid valve on both heating and cooling cycles. T640A UNIT T603G,H CHANGEOVER THERMOSTAT 0 0 NORMALLY OPEN VALVE IN WATER SUPPLY TO UNIT R B 0 W MOTORIZED OR SOLENOID VALVE IN WATER SUPPLY TO UNIT CONDITIONER L (HOT) L POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M8838 L (HOT) L POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M8839 Fig. 6 Typical hookup for T640 used with a T603J line voltage thermostat to control a normally open valve or a fan on both heating and cooling cycles. T640 UNIT N.O. N.C. COM 0 T603J CHANGEOVER THERMOSTAT R B SOLENOID OR FAN L (HOT) W L POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M8840 Operation And Checkout After the T640 is installed and wired into the system, check controller action by slowly raising the temperature setpoint above room temperature. Heating equipment should start or cooling equipment should stop operation, depending on the application. Lower the setpoint temperature below room temperature. Heating equipment should stop operation or cooling equipment should begin, depending upon the application

6 Home and Building Control Home and Building Control Helping You Control Your World Honeywell Inc. Honeywell Limited Honeywell Limitée 985 Douglas Drive North 740 Ellesmere Road Golden Valley, MN 554 Scarborough, Ontario MP V Printed in U.S.A. 6

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