background image

PRODUCT DATA

Copyright © 1996 Honeywell Inc.   •          •   All Rights Reserved

X-XX UL

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.

T4398A,B High

Performance Electric Heat Thermostats

Contents

General ............................................................................. 1
Features ............................................................................ 1
Specifications .................................................................... 2
Ordering Information ......................................................... 2
Installation ......................................................................... 3
Settings and Adjustment ................................................... 4
Checkout ........................................................................... 5
Operation .......................................................................... 6

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.

68-0147-2

Summary of Contents for T4398A1021 - Electric Heat Thermostat

Page 1: ...asy installation Cover thermometer indicates room temperature Rugged plastic mounting base Contemporary white finish complements almost any decor T4398A B High Performance Electric Heat Thermostats Contents General 1 Features 1 Specifications 2 Ordering Information 2 Installation 3 Settings and Adjustment 4 Checkout 5 Operation 6 GENERAL The T4398A B High Performance Electric Heat Thermostats prov...

Page 2: ...riters Laboratories Listed File no E47434 guide 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 Number Switching Tem...

Page 3: ...ehind 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 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 featur...

Page 4: ...ith 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 e...

Page 5: ...d the thermometer 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 of the scale ring is the same temperature as the cover thermometer See Fig 5 Wait five minutes and recheck the calibration Fig 5 Calibrating thermostat Setting Range Stops Use th...

Page 6: ...nt 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 to 4 F 1 to 3 C depending on the load demand Temperature settings are adjusted to offset this The T43...

Page 7: ...T4398A B HIGH PERFORMANCE ELECTRIC HEAT THERMOSTATS 68 0147 2 7 ...

Page 8: ... Printed in U S A Home and Building Control Honeywell Inc 1985 Douglas Drive North Golden Valley MN 55422 Home and Building Control Honeywell Limited Honeywell Limitée 155 Gordon Baker Road North York Ontario M2H 2C9 Printed on recycled paper containing at least 10 post consumer paper fibers www honeywell com yourhome ...

Reviews: