Honeywell T4398A User's Manual
Contents
1. LOCKING DA COVER SCREW EN ALLEN WRENCH M5798 THERMOSTAT cover 7 Fig 7 Locking cover CHECKOUT IMPORTANT Make sure that all wiring connections are secure before beginning checkout After thermostat installation is complete check the operation as follows O Move the thermostat setting knob clockwise until the switch makes click sound the electric heater starts O Move the setting knob counterclockwise all the way the switch breaks and the electric heater starts to cool Allow the thermostat to operate for several hours to determine the appropriate temperature setting Adjust the setting as necessary The precise temperature control of the T4398 allows the user to select a lower temperature setting which saves energy while maintaining comfort 68 0147 2 T4398A B HIGH PERFORMANCE ELECTRIC HEAT THERMOSTATS OPERATION The T4398 Thermostat provides precise temperature control of resistance rated electric baseboard heating equipment with minimum droop The T4398 controls room temperature within 2 F 1 C regardless of the load of the baseboard heater The vapor filled dual diaphragm sensing element is more sensitive to temperature changes than a bimetal sensor This accuracy usually associated with low voltage thermostats is now available for line voltage control Electric heat thermostats are often affected by the heat generated in the control Temperature control points can vary or droop 2 to2. 4 F 1 to 3 C depending on the load demand Temperature settings are adjusted to offset this The T4398 provides precise control with minimum droop This allows better control of room temperatures from day to night and season to season while saving energy 68 0147 2 6 68 0147 2 Honeywell Home and Building Control Home and Building Control Honeywell Inc Honeywell Limited Honeywell Limit e 1985 Douglas Drive North 155 Gordon Baker Road Golden Valley MN 55422 North York Ontario M2H 2C9 y A amp Printed on recycled paper containing at 68 0147 2 C H Rev 4 96 Printed in U S A least 10 post consumer paper fibers Helping You Control Your World www honeywell com yourhome
3. Do not remove thermostat cover until wiring is complete to avoid damaging the sensing element Location Install a vertical outlet box which is used to mount the thermostat on about 5 ft 1 5 m above the floor in an area with good air circulation at room temperature Do not install the thermostat where it may be affected by drafts or dead spots behind doors in corners or under cabinets hot air from convectors radiant heat from sun or appliances concealed pipes and chimneys unheated uncooled areas such as an outside wall behind the thermostat Wiring and Mounting N CAUTION 1 Handle the thermostat with care to avoid damaging the sensing element or control 2 Use a separate limit control in the heating appliance IMPORTANT If locking cover feature is desired insert the locking cover clip in the thermostat base before mounting the thermostat on the wall See Fig 7 Replacement Applications Disconnect power to thermostat to prevent electrical shock or equipment damage All wiring must comply with local electrical codes and ordinances Remove the old thermostat from the wall taking care not to damage the wiring insulation Check the old wire insulation for cracks nicks or fraying Apply approved electrical tape to insulate wires or replace wires as necessary Do not remove T4398 Thermostat Cover Using wire connectors approved for No 12 wires make line voltage connections d
4. IMPORTANT The Specifications given in this publication do not include normal manufacturing tolerances Therefore this unit may not exactly match the listed specifications Also this product is tested and calibrated under closely controlled conditions and some minor differences in performance can be expected if those conditions are changed For exact engineering specifications contact your Honeywell sales representative TRADELINE MODELS TRADELINE models are selected and packaged to provide ease of stocking and handling and also maximum replacement value TRADELINE model specifications are listed in Table 1 Electrical Ratings Noninductive Resistive Loads 22A at 120 208 240 Vac 19A at 277 Vac 60 Hz Wiring Connections 6 in 150 mm copper leadwires suitable for connecting to aluminum wiring if approved special service CO ALR connectors are used Sensing Element Vapor filled dual diaphragm Temperature Setting Range 50 to 80 F 10 to 25 C Thermometer Temperature Range 50 to 90 F 10 to 30 C Differential 2 F 1 C nonadjustable Setpoint Adjustment Dial on front of thermostat Dimensions See Fig 1 Barometric Sensitivity 1 F 500 ft 0 5 C kPa Mounting Mount directly on vertical 2 x 4 in outlet box or on 4 x 4 in outlet box with ring adapter ordered separately using 6 32 Robertson slotted screws Approvals Underwriters Laboratories Listed File no E47434 gui
5. ED BREAKS ON TEMPERATURE RISE MAKES ON TEMPERATURE FALL A USE A SEPARATE LIMIT CONTROL IN THE HEATING APPLIANCE A BREAKS AT POSITIVE OFF ONLY NOT THERMALLY ACTIVATED A DO NOT CONNECT GROUNDED CONDUCTOR NEUTRAL ON 120 OR 227V CIRCUITS INSULATE AND TAPE OR CUT OFF RED WIRES IF UNUSED edad Fig 3 Typical wiring connections for T4398B 68 0147 2 I wal OUTLET 7 ee BOX SETTING DIA INDICATOR MOUNTING SCREWS 2 M5797 Fig 4 Mounting thermostat to outlet box New Applications Disconnect power supply to prevent electrical shock or equipment damage All wiring must comply with local electrical codes and ordinances Run line voltage wiring to the thermostat location Do not remove T4398 Thermostat Cover Using wire connectors approved for No 12 wires make line voltage connections directly to leadwires on thermostat See Figs 2 and 3 for typical wiring connections Prebend and push solid wires into the outlet box Remove the thermostat cover by grasping the top and bottom edges and pulling outward away from the base Turn the setting dial so indicator is at the 12 o clock position to prevent damaging the sensing element when mounting the thermostat Mount the thermostat on the outlet box as shown in Fig 4 Secure the thermostat by tightening the two mounting screws o 66 SETTINGS AND ADJUSTMENTS Calibration The T4398 Thermostats are calibrated at the factory using precise instruments
6. Honeywell T4398A B High Performance Electric Heat Thermostats GENERAL The T4398A B High Performance Electric Heat Thermostats provide precise line voltage control of resistance rated electric heating equipment Snap action switch makes heating circuit on temperature fall T4398B models make double line break with setting knob at OFF position Copyright 1996 Honeywell Inc All Rights Reserved PRODUCT DATA FEATURES e Controls both fan forced and baseboard electric heaters e Temperature responsive vapor filled dual diaphragm sensing element provides 2 F 1 C sensitivity with minimum droop e UL listed up to 5 kW at 277 Vac Replaces virtually all standard wall mounted line voltage thermostats e Includes long lasting Micro Switch mechanism e Color coded leads for easy installation Cover thermometer indicates room temperature Rugged plastic mounting base e Contemporary white finish complements almost any decor Contents General eenma aaaea di ac ee ied ESEA 1 A innen 1 Specificatiohs 4a0 na Enina 2 Ordering Information 24424444 40er nnnnnnennnnnnnnn nenn 2 Install tion 2s2 2A ee 3 Settings and Adjustment rs2r4s0ennnrnnnnnnnnnnnnnnnnnn nenn 4 A SALE aE REAA Eea AGERE 5 Operation unnsessssennannnnnnnnnnnnnnnnnnnnnnnnnnnnnnnonannnnnnnnannnnnnn 6 68 0147 2 T4398A B HIGH PERFORMANCE ELECTRIC HEAT THERMOSTATS SPECIFICATIONS
7. de no XAPX Canadian Standards Association Listed File no LR1322 Accessories 272804A Range Stop and Locking Screw Assembly Includes locking cover screws Tinnerman cilps wrench and range stops two plastic pins to insert inside cover for field selection of minimum and maximum temperature settings Table 1 Thermostat Specifications Model Temperature Rating F C Number T4398B ORDERING INFORMATION T4398A Spst makes single line break on 50 to 80 10 to 25 White Cover thermometer temperature temperature fall range stops and locking cover Dpst makes double line break 50 to 80 10 to 25 White Cover thermometer temperature with setting knob at OFF position range stops and locking cover 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 1 Model Number 2 Switching 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 Limit e 35 Dynamic Drive Scarborough Ontario M1V 429 International Sales and Service Offices in al
8. irectly to leadwires on thermostat See Figs 2 and 3 for typical wiring connections Prebend and push solid wires into the outlet box Remove the thermostat cover by grasping the top and bottom edges and pulling outward away from the base Turn the setting dial so the indicator is at the 12 o clock position to prevent damaging the sensing element when mounting the thermostat Mount the thermostat on the outlet box as shown in Fig 4 Secure the thermostat by tightening the two mounting screws o 0 00 68 0147 2 T4398A B HIGH PERFORMANCE ELECTRIC HEAT THERMOSTATS T4398A SOLDERLESS CONNECTORS ELECTRIC HEATER HOT A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED A USE SPECIAL SERVICE CO ALR SOLDERLESS CONNECTORS WHEN CONNECTING ALUMINUM CONDUCTORS OR A FIRE HAZARD MAY RESULT A USE A SEPARATE LIMIT CONTROL IN THE HEATING APPLIANCE A BREAKS AND REMAKES BELOW 31 F 35 C NORMALLY THERMAL ACTIVATED BREAKS ON TEMPERATURE RISE MAKES ON TEMPERATURE FALL M5791B Fig 2 Typical wiring connections for T4398A T4398B ELECTRIC HEATER L2 SOLDERLESS A CONNECTORS L1 HOT A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED A USE SPECIAL SERVICE CO ALR SOLDERLESS CONNECTORS WHEN CONNECTING ALUMINUM CONDUCTORS OR A FIRE HAZARD MAY RESULT A BREAKS AT POSITIVE OFF AND REMAKES UNDER 31 F 35 C NORMALLY THERMALLY ACTIVAT
9. l principal cities of the world Manufacturing in Australia Canada Finland France Germany Japan Mexico Netherlands Spain Taiwan United Kingdom U S A 68 0147 2 T4398A B HIGH PERFORMANCE ELECTRIC HEAT THERMOSTATS FRONT VIEW SIDE VIEW I 1 3 4 al 1 2 13 48 N Fig 1 T4398 approximate dimensions in in mm RECYCLING 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 any control containing mercury in a sealed tube INSTALLATION When Installing this Product 1 Read these instructions carefully Failure to follow these instructions could damage the product or cause a hazardous condition 2 Check the ratings 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 A WARNING HIGH VOLTAGE CONTROL ELECTRICAL SHOCK HAZARD Follow local codes and ordinances when installing this thermostat Improper handling can cause serious injury or death AN CAUTION Disconnect power supply to prevent electrical shock or equipment damage 2 If connecting with aluminum conductors use CO ALR solderless wire connectors to avoid fire hazard 3
10. of the scale ring is the same temperature as the cover thermometer See Fig 5 Wait five minutes and recheck the calibration THERMOSTAT BASE ay a I AN TT SETTING KNOB jo AT 12 O CLOCK A gt POSITION Sd o SCALE RING D SETTING KNOB CAD yA M5796 Fig 5 Calibrating thermostat Setting Range Stops Use the range stops included to limit the maximum and minimum temperatures that may be set O Move the thermostat setting dial to the desired maximum temperature O Remove the thermostat cover Insert the range stop pins in the desired minimum and maximum temperature setting positions on the back of the thermostat cover See Fig 6 Make sure the pins are completely seated before replacing the thermostat cover Replace the thermostat cover and check the range stops Locking Cover The thermostat cover may be locked using the locking cover screws included Locking the cover prevents unauthorized tampering of the thermostat temperature setting Remove the thermostat cover Insert the locking cover clip included into the slot at the back of thermostat base as shown in Fig 7 Using the Allen wrench insert the locking cover screw into the clip Secure the screw in place until it is flush with the thermostat base BACK OF THERMOSTAT COVER S z INSERT RANGE STOP PINS IN SLOTS M5801 Fig 6 Setting range stops D P LOCKING COVER CLIP
11. under closely controlled conditions Recalibration should not be necessary Allow the thermostat to operate for several hours before checking calibration The T4398 Thermostat vapor filled dual diaphragm sensing element is affected by barometric pressure and altitude Temperature deviations of 1 F 0 5 C are normal If the thermostat is mounted in a suitable location as instructed in the Location section and still appears out of calibration check calibration as follows Check Calibration Remove the thermostat cover and set it aside for several minutes because radiant heat from your hands will affect the thermometer reading O Turn the setting dial clockwise until the switch makes click sound The heating equipment and fan start No recalibration is necessary if the thermostat switch makes with the thermostat setting at the same temperature as indicated on the thermostat cover thermometer T4398A B HIGH PERFORMANCE ELECTRIC HEAT THERMOSTATS Ifthe thermostat setting differs from the thermometer record the temperature difference and recalibrate as instructed in the Recalibration Procedure section Recalibration Procedure Note the temperature difference between the thermostat setting and the thermometer O Turn the setting dial clockwise until the switch makes click sound Firmly hold the setting dial with one hand Using the other hand turn the outer scale ring counterclockwise until the 12 o clock position
Download Pdf Manuals
Related Search