Honeywell T4800A User's Manual
Contents
1. 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 CAUTION Handle the thermostat with care to avoid damage A N 2 Use a separate limit control in the heating appliance 3 Do not short 208 or 240 volt supply wires with thermostat This will damage the T4800 and void the warranty Replacement Applications Disconnect power to the 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 Carefully remove thermostat cover by gently lifting at top edge with a flathead screwdriver Using wire connectors approved for No 12 wires make line voltage connections directly to leadwires on thermostat See Fig 2 for typical wiring connections Be sure all wiring connections are tight Prebend and push solid wires into the outlet box Secure the thermostat on the outlet box by tightening the two mounting screws Rotate control knob to more easily access lower mounting screw Snap thermostat cover in place New Applications Disconnect power to the thermostat to prevent e2. Setpoint Adjustment Control knob on front of thermostat Sensing Element Electronic thermistor Dimensions See Fig 1 Red LED Indicator Lights as heat comes on Mounting Means Mount directly on vertical 2 x 4 inch outlet box or on 4 x 4 inch outlet box with ring adapter ordered separately Approvals CSA certified LR1322 Underwriters Laboratories Inc Listed File No E47434 Guide No XAPX 3 1 8 80 gt e 1 5 16 e 1 5 16 34 34 Honeywell 4 3 4 120 l 7 8 23 e M7102 Fig 1 Nominal dimensions in in mm 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 Voltage 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 Honeywell Customer Relations Honeywell 1885 Douglas Drive North Golden Valley Minnesota 55422 4386 In Canada Honeywell Limited Honeywell Limit e 35 Dynamic Dr Scarborough Ontario M1V 429 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 68
3. 0151 1 T4800A PRECISION ELECTRONIC ELECTRIC HEATING THERMOSTAT 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 your old control 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 WARNING HIGH VOLTAGE CONTROL ELECTRICAL SHOCK HAZARD Follow local codes and ordinances when installing this thermostat Improper handling may cause serious injury or death CAUTION 1 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 Location Install a vertical outlet box which is used to mount the thermostat on about 5 ft 1 5m 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
4. the sponsorship of EPRI the Electric Power Research Institute Honeywell Automation and Control Solutions Honeywell 1985 Douglas Drive North Golden Valley MN 55422 35 Dynamic Drive Scarborough Ontario MIV 4Z9 68 0151 1 C B Rev 4 96 Honeywell Limited Honeywell Limit e r x Printed on recycled paper containing at Printed in U S A least 10 post consumer paper fibers
5. to warm up Turn knob all the way counterclockwise N LED should go off the power circuit should be broken and electric heater should start to cool NOTE The T4800 has a load responsive time delay to reduce equipment wear which makes the mechanical switching differential appear wider the faster the knob is rotated This time delay does not affect the thermal operation of the T4800 Allow thermostat to operate for several hours to determine appropriate temperature setting Adjust the setting as necessary moving the knob only one or two degrees at a time The precise temperature control of the T4800 allows the user to select a lower temperature setting which saves energy while maintaining comfort OPERATION The T4800 Thermostat provides precise temperature control with minimum droop of resistance rated electric baseboard heating equipment The T4800 controls room temperature within 1 F 0 5 C for average baseboard heater loads Electric heat thermostats are often affected by the heat generated in the control Temperature control points may vary or droop 2 to 4 F 1 to 3 C depending on the load demand Temperature settings are adjusted to offset this The T4800 provides precise control with minimum droop This allows better control of room temperatures from day to night and season to season while saving energy The development of this technology was assisted by the electric power industry of the United States under
6. Honeywell T4800A Precision Electronic Electric Heating Thermostat GENERAL The T4800A Electric Heating Thermostat provides precise accurate line voltage control of resistance rated heating equipment A patented Cool Switch design activates the heating circuit on temperature fall and results in longer life for the thermostat Copyright 1996 Honeywell Inc e e All Rights Reserved PRODUCT DATA FEATURES e CSA Certified and Performance Certified Underwriters Laboratories Inc Listed Conforms to NEMA standard DC3 for thermostat accuracy e Rugged molded thermoplastic mounting base with captive mounting screws e Energy efficient and economical e Patented electronic switch requires no leveling e High sensitivity solid state temperature sensing element e Nonpolarized leadwire connections e Adjustment range is 40 to 80 F 5 to 25 C e Premier White finish e One piece decorative cover e Red LED status indication e Suitable for noninductive rated fan forced heaters radiant cable or convectors CONTENTS General iets 2avenye ae este dienes needa RO i 1 FCatu re reacer ea a Rascals 1 SPECHICATONS seurina a Naa ence iT 2 Ordering Informatio Naisissa enia 2 ISAM ATION siseses enese eaka cei a aaea 3 Setting and Checkout eee eeceeeeeeeeeeeeeeteeeeeeeeteeeeteeeeeetaees 4 OPS TALON essc ine ee E a aE a iaaii 4 68 0151 1 T4800A PRECISION ELECTRONIC ELECTRIC HEATING THERMOSTAT SPEC
7. IFICATIONS 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 as follows Model T4800A makes heating circuit on temperature fall Single pole single throw See Fig 2 Range 40 to 80 F 5 to 25 C Type of Switching Cool Switch Triac relay combination Wiring Connections 6 in 150 mm stranded copper leadwires suitable for connecting to aluminum wiring when approved special service CO ALR solderless connectors are used Electrical Rating Noninductive resistive rating 2 7A minimum 750W 240V 560W 208V to 16A maximum 3800W 240V 3300W 208V Performance Certification 16A at 208 or 240 Vac Performance Specifications Precision 1 F 0 5 C differential with thermistor time constant of 10 seconds ORDERING INFORMATION Accuracy 1 F 0 5 C droop average for range of loads Conforms to NEMA DC3 standard applied to low voltage thermostats
8. lectrical shock or equipment damage All wiring must comply with local electrical codes and ordinances Carefully remove thermostat cover by gently lifting at top edge with a flathead screwdriver Using wire connectors approved for No 12 wires make line voltage connections directly to leadwires on thermostat See Fig 2 for typical wiring connections Be sure all wiring connections are tight Prebend and push solid wires into the outlet box Secure the thermostat on the outlet box by tightening the two mounting screws Rotate control knob to more easily access lower mounting screw Snap thermostat cover in place BLACK BLACK SOLDERLESS CONNECTORS ELECTRIC HEATER Li HOT L2 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 HEATING CIRCUIT ON A TEMPERATURE RISE A USE A SEPARATE LIMIT CONTROL IN THE HEATING APPLIANCE M7103 Fig 2 Typical wiring connections for T4800A 68 0151 1 T4800A PRECISION ELECTRONIC ELECTRIC HEATING THERMOSTAT SETTING AND CHECKOUT IMPORTANT Make sure that all wiring connections are secure before beginning checkout After the thermostat has been installed and powered up simulate normal operation as follows Turn control knob all the way clockwise N LED should light and electric heater should start
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