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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
T4398A,B High
FEATURES
• Controls both fan-forced and baseboard electric
heaters.
• Temperature-responsive, vapor-filled dual diaphragm
sensing element provides 2°F (1°C) sensitivity with
minimum droop.
• UL listed up to 5 kW at 277 Vac.
• Replaces virtually all standard wall-mounted line
voltage thermostats.
• Includes long-lasting Micro Switch™ mechanism.
• Color-coded leads for easy installation.
• Cover thermometer indicates room temperature.
• Rugged, plastic mounting base.
• Contemporary white finish complements almost any
decor.
General ............................................................................. 1
Features ............................................................................ 1
Specifications .................................................................... 2
Ordering Information ......................................................... 2
Installation ......................................................................... 3
Settings and Adjustment ................................................... 4
Checkout ........................................................................... 5
Operation .......................................................................... 6
X-XX UL
PRODUCT DATA
Contents
68-0147-2
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Summary of Contents for Honeywell T4398A1021 - Electric Heat Thermostat
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Page 1: Table Of Contents
General ................1 Features ................1 Specifications ..............2 Ordering Information ............2 Installation ................. 3 Settings and Adjustment ........... 4 Checkout ................5 Operation ................6 Copyright © 1996 Honeywell Inc. • • All Rights Reserved 68-0147-2 X-XX UL... -
Page 2: Specifications
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. -
Page 3: Installation
T4398A,B HIGH PERFORMANCE ELECTRIC HEAT THERMOSTATS CAUTION FRONT VIEW SIDE VIEW 1/2 (13) Disconnect power supply to prevent electrical 1-3/4 (19) (48) shock or equipment damage. If connecting with aluminum conductors, use CO/ • ALR solderless wire connectors to avoid fire •... -
Page 4: Settings And Adjustment
T4398A,B HIGH PERFORMANCE ELECTRIC HEAT THERMOSTATS T4398A WALL THERMOSTAT BASE SOLDERLESS CONNECTORS ELECTRIC HEATER OUTLET SETTING DIAL INDICATOR (HOT) POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. MOUNTING SCREWS (2) USE SPECIAL SERVICE CO/ALR SOLDERLESS CONNECTORS M5797 WHEN CONNECTING ALUMINUM CONDUCTORS OR A FIRE Fig. -
Page 5: Checkout
T4398A,B HIGH PERFORMANCE ELECTRIC HEAT THERMOSTATS BACK OF If the thermostat setting differs from the thermometer, THERMOSTAT record the temperature difference and recalibrate as COVER instructed in the Recalibration Procedure section. Recalibration Procedure Note the temperature difference between the thermostat setting and the thermometer. INSERT RANGE STOP PINS IN Turn the setting dial clockwise until the switch makes... -
Page 6: Operation
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. - Page 7 T4398A,B HIGH PERFORMANCE ELECTRIC HEAT THERMOSTATS 68-0147—2...
- Page 8 T4398A,B HIGH PERFORMANCE ELECTRIC HEAT THERMOSTATS Home and Building Control Home and Building Control Helping You Control Your World Honeywell Inc. Honeywell Limited-Honeywell Limitée 155 Gordon Baker Road 1985 Douglas Drive North Golden Valley, MN 55422 North York, Ontario M2H 2C9 Printed on recycled paper containing at 68-0147—2...