Honeywell T8400C Users Manual 69 1480 And T8401C Electronic Thermostats
2015-01-23
: Honeywell Honeywell-T8400C-Users-Manual-262480 honeywell-t8400c-users-manual-262480 honeywell pdf
Open the PDF directly: View PDF 
.
Page Count: 6
| Download | |
| Open PDF In Browser | View PDF |
T8400C and T8401C Electronic Thermostats INSTALLATION INSTRUCTIONS The T8400C and T8401C Thermostats provide singlestage, non-programmable temperature control for 24V heating-cooling systems with manual changeover from heat to cool. Heating cycle rate is selectable at 1, 3, 4, 5, 6, or 9 cph. Cooling cycle rate is fixed at 3 cph. Temperature indication can be set for °F or °C. The T8400C Thermostat is powered through the heating/ cooling system controls. The T8401C Thermostat is powered directly from the system transformer. Batteries are not required because setpoints are held permanently by non-volatile memory for all models. All TRADELINE® models include a thermostat, wallplate (for wiring and mounting thermostat) and owner’s guide. The T8400C SUPER TRADELINE® model also includes two decorator cover plates for covering wallmarks. MERCURY NOTICE If this control is replacing a control that contains mercury in a sealed tube, do not place your old control in the trash. Contact your local waste management authority for instructions regarding recycling and the proper disposal of an old control containing mercury in a sealed tube. INSTALLATION When Installing this Product… 1. 2. 3. 4. 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. Installer must be a trained, experienced service technician. After installation is complete, check out product operation as provided in these instructions. CAUTION Electrical Shock or Equipment Damage Hazard. Can shock individuals or short equipment circuitry. Disconnect power supply before installation. Location Install the thermostat about 5 ft (1.5m) above the floor in an area with good air circulation at average temperature. See Fig. 1. Do not install the thermostat where it can be affected by: — drafts or dead spots behind doors and in corners. — hot or cold air from ducts. — radiant heat from the sun or appliances. — concealed pipes and chimneys. — unheated (uncooled) areas such as an outside wall behind the thermostat. This thermostat is a precision instrument and was carefully adjusted at the factory. Handle it carefully. ® U.S. Registered Trademark Copyright © 2002 Honeywell • • All Rights Reserved 69-1480-1 T8400C AND T8401C ELECTRONIC THERMOSTATS YES NO NO 5 FEET [1.5 METERS] NO M10308 Fig. 1. Typical location of thermostat. Mounting Decorator Cover Plate and Wallplate to Wall The shape of the terminals permits insertion of straight or wraparound wiring connections; either method is acceptable. See Fig. 4. IMPORTANT Level only for appearance. The thermostat functions normally even when not level. The T8400C Thermostat is powered through the heating/ cooling system controls and is adaptable to most 4-wire, 18 to 30 Vac heating-cooling systems. NOTE: Only SUPER TRADELINE® models have the cover plate. The T8401C Thermostat is powered directly from the system transformer and is adaptable to most 5-wire, 18 to 30 Vac heating-cooling systems. Refer to Fig. 5 and 6 for typical wiring hookups. Mount decorator cover plate (SUPER TRADELINE® model only), wallplate, T8400C or T8401C, and the screws provided (see Fig. 2) as follows: 1. Place the desired decorator cover plate and the wallplate at the desired location on the wall. 2. Pull the thermostat wire through the entrance hole on the decorator cover plate, then through the wallplate entrance hole. 3. Select the two mounting holes that best fit the application. 4. Fasten the decorator cover plate and the wallplate to the wall using the anchors and screws provided. 5. After wiring the wallplate, plug the hole to prevent drafts from affecting the thermostat; see Wiring section. 5-3/4 IN. x 5-3/4 IN. DECORATOR COVER PLATE WALL 1 2 WALL ANCHORS (2) Wiring IMPORTANT Use an 18-gauge maximum wire for wiring the T8400C and T8401C Thermostats. All wiring must comply with local electrical codes and ordinances. Disconnect the power supply to prevent electrical shock or equipment damage. NOTE: To ensure proper mounting of thermostat, restrict all wiring to the shaded area on the left side of the terminals. See Fig. 3. 69-1480-1 1 3-7/8 IN. x 3-7/8 IN. DECORATOR COVER PLATE (SELECT MODELS). 2 DRILL 3/16 INCH HOLES (IF DRYWALL) OR 7/32 (PLASTER OR WOOD) WHEN USING WALL ANCHORS. M11041C Fig. 2. Mounting decorator cover plate and wallplate to wall. 2 T8400C AND T8401C ELECTRONIC THERMOSTATS KEEP WIRING IN SHADED AREA T8400C, T8401C ALTERNATE MOUNTING SCREW HOLE W COOLING CONTACTOR Y G R W FAN RELAY C 2 1 Y MOUNTING SCREW HOLE G R L1 (HOT) 1 L1 (HOT) L2 24V T T OIL PRIMARY CONTROL L2 C ALTERNATE MOUNTING SCREW HOLE POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 IN T8401C INSTALLATIONS, CONNECT C TERMINAL. M11022B Fig. 6. T8400C/T8401C heat-cool wiring diagram in oil heating/electric cooling system. Oil primary has its own transformer. WIRING ENTRANCE HOLE MOUNTING SCREW HOLE 1 M11023 Mounting Thermostat to Wallplate Fig. 3. Restrict wiring to shaded area. 1. 2. W Engage the tabs at the top of the thermostat and wallplate. Swing down the thermostat and press the lower edge of the thermostat onto the wallplate to latch. See Fig. 7. DASHED LINES INDICATE TABS ON BACK OF THERMOSTAT Y G FOR WRAPAROUND STRIP 7/16 IN. (11 MM) Set Set Room Room R FOR STRAIGHT INSERTION STRIP 5/16 IN. (8 MM) FAN Auto On FAN Auto SYSTEM Cool Off Heat SYSTEM Cool Off Heat C A M11232 TERMINAL SCREW Fig. 4. Wiring connections. COOLING CONTACTOR Y G R L1 (HOT) PRESS LOWER EDGE OF CASE TO LATCH. Fig. 7. Mounting thermostat wallplate. W C HEATING PRIMARY CONTROL 1 B M18416 T8400C, T8401C 2 ENGAGE TABS AT TOP OF THERMOSTAT WITH SLOTS ON WALLPLATE. OPERATION Setting FAN and SYSTEM Switches FAN RELAY Fan and system settings are controlled manually by using the switches located at the bottom of the thermostat case. See Fig. 8. 24V L2 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 IN T8401C INSTALLATIONS, CONNECT C TERMINAL. FAN Switch M11021B Fig. 5. T8400C/T8401C heat-cool wiring diagram in single transformer system with gas heat/electric cooling. Fan switch settings are: On: The fan runs continuously. Use for improved air circulation and air quality. Auto: Normal setting for most homes. In cooling, the fan starts and stops with the cooling equipment. In heating, the fan is controlled directly by the heating equipment and may start a few minutes after the heating equipment turns on (on most systems). When using an electric heat thermostat, the fan starts and stops with the heating equipment. 3 69-1480-1 T8400C AND T8401C ELECTRONIC THERMOSTATS Slide the FAN switch in the bottom left corner of the thermostat to select the desired fan setting. 3. To increase the temperature setpoint press the s key. Each press changes the setpoint one degree; press and hold to change the setpoint several degrees. 4. To decrease the temperature setpoint press the t key. Each press changes the setpoint one degree; press and hold to change the setpoint several degrees. SYSTEM Switch System switch settings control thermostat operation as follows: Cool: The thermostat controls the cooling system. Off: Both heating and cooling are off. Heat: The thermostat controls the heating system. M14681 Slide the SYSTEM switch in the bottom right corner of the thermostat to select the desired system setting. TEMPERATURE DISPLAY M14682 INCREASE SETTING Set NOTE: To save changes to the °F/°C indication and the heat cycle rate, all seven steps must be completed. Room FAN Auto On Setting °F/°C Indication and Heat Cycle Rate DECREASE SETTING SYSTEM Cool Off Heat FAN SWITCH SYSTEM SWITCH To set the °F/°C indication and heat cycle rate: 1. If the temperature is displayed in °F, set the temperature setpoint to 52°F. If the room temperature is displayed in °C, set the temperature setpoint to 11°C. M18417 Fig. 8. Digital display and system switches (FAN and SYSTEM). Set Temperature Setpoint NOTE: Temperature setpoint range is 40° to 99°F (5° to 37°C). M14683 OPTIONAL SYSTEM CHECKOUT When in steps 2 and 3 only, the t key can be used to turn heat or cool outputs on and off. Change the SYSTEM switch setting to test heat or cool outputs. No action takes place If the system switch is in the Off position. Examples: System setting at HEAT: If heat is on, the t key turns it off; if heat is off, t turns it on. The temperature setpoint and the room temperature are shown separately on the digital display. The t indicator points to Set when the temperature setpoint is displayed and to Room when the room temperature is displayed . M14684 System setting at COOL: If cool is on, t key turns it off; if cool is off, t turns it on. INDICATOR Set Room ROOM TEMPERATURE SETPOINT TEMPERATURE M14679 M14685 To set temperature setpoint: 1. Select Heat or Cool by sliding the SYSTEM switch in the lower right corner of the thermostat to the desired mode. See Fig. 8. 2. To display the temperature setpoint on the digital display, press either the s or t key once. The temperature setpoint is displayed for approxi-mately five seconds as the indicator points to Set and flashes. M14680 69-1480-1 2. Press the st keys simultaneously for more than one second to light all segments on display and to enter installer setup mode. When the keys are released, a two-digit software revision code is displayed. M14686 NOTE: In installer setup mode only, each press of the s key momentarily displays 01. Each press of the t key momentarily displays 02. When the keys are released, these two-digit codes are no longer displayed. 4 T8400C AND T8401C ELECTRONIC THERMOSTATS 3. Press the s key. Factory information is displayed. A typical example is shown, but information displayed varies by model. This information is for factory use only. Press the s key to save all changes, exit installer setup mode and return to normal operation. NOTE: After exiting installer setup mode, change the setpoint to the desired room temperature. CHECKOUT M14687 4. 10. Press the s key again to display °C or °F. Heating 1. 2. M14688 5. Press the t key to change the °C or °F indication. 6. Press the s key to display the heat cycle rate of 1, 3, 4, 5, 6, 9, or 12. If the desired cycle is displayed, press the s key to exit the installer setup mode. To change the heat cycle rate, press the t key to scroll between 1, 3, 4, 5, 6, or 9. Stop scrolling when the desired rate is displayed. See Table 1 for the cycle rate options and the corresponding system equipment. M14689 3. Slide the SYSTEM switch to Heat and the FAN switch to Auto, if available. Press and hold the s key to raise the temperature setting several degrees above the room temperature. After approximately ten seconds, the heating equipment should start. In conventional systems, the system turns on the fan through the use of a time delay relay or through a limit control. When using an electric heat thermostat, the fan starts immediately. Press the t key to lower the temperature setting below the room temperature. Heating equipment should stop. Cooling CAUTION Low Temperature Hazard. Operating at too low of an outdoor temperature may cause compressor damage. Do not operate cooling if outdoor temperature is below 50°F (10°C). Refer to manufacturer’s recommendations. M14690 Table 1. Heating Cycle Rates. System Cycles Per Hour Steam, radiant floor heat, gravity 1 Hydronic heat, condensing gas furnacea 3 Gas or oil forced air 6 Electric heat 1. 2. 9 4, 5, 12 Special applicationsb 3. aHigh efficiency furnace. bRefer to equipment manufacturer’s instructions. NOTE: Steps 7 and 8 are available on select models. 7. Press the s key to display cooling algorithm configuration default. NOTE: To bypass the 5 minute delay, see the Optional System Checkout section. Fan 1. 2. M18419A 8. 9. Press the s key again to change cooling algorithm to C1 or C3. C1 = Standard cooling algorithm. C3 = Aggressive cooling algorithm (can cause overshooting). Press the s key again. Current configuration (CC) is displayed. A typical example is shown, but CC varies by model. (This information is for factory use only.) Slide the SYSTEM switch to Cool and the FAN switch to Auto. Press the t key to lower the temperature setting several degrees below the room temperature. After approximately five minutes, the cooling equipment should start. The fan starts and stops with the cooling equipment. Press the s key to raise the temperature setting above the room temperature. Cooling system should shut down. Slide the SYSTEM switch to Off and the FAN switch to On. The fan should run continuously. Slide the FAN switch to Auto. In heating, the fan is controlled directly by the heating equipment and may start a few minutes after the heating equipment turns on (on most systems). When using an electric heat thermostat, the fan starts and stops with the heating equipment. In cooling, the fan starts and stops with the cooling equipment. Make certain all equipment responds properly to the thermostat. M18420 5 69-1480-1 Automation and Control Solutions Honeywell 1985 Douglas Drive North Golden Valley, MN 55422 69-1480-1 G.H. Rev. 2-02 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Scarborough, Ontario M1V 4Z9 www.honeywell.com/yourhome
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.6 Linearized : Yes Encryption : Standard V1.2 (40-bit) User Access : Print, Copy, Fill forms, Extract, Assemble, Print high-res Page Mode : UseOutlines XMP Toolkit : 3.1-701 Producer : Acrobat Distiller 7.0 (Windows) Creator Tool : FrameMaker 7.0 Modify Date : 2006:06:16 13:12:21-05:00 Create Date : 1999:07:07 12:30:47Z Metadata Date : 2006:06:16 13:12:21-05:00 Format : application/pdf Title : 69-1480 - T8400C and T8401C Electronic Thermostats Creator : Honeywell ECC Technical Communications Description : Installation Instructions Document ID : uuid:dbe761d1-3f94-4028-9544-16740a44f323 Instance ID : uuid:ae66e038-e0b8-4809-b563-a32b6c27c81e Page Count : 6 Subject : Installation Instructions Author : Honeywell ECC Technical CommunicationsEXIF Metadata provided by EXIF.tools