Honeywell T4398B, T4398A User Manual

T4398A,B High

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Performance Electric Heat Thermostats

PRODUCT DATA

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.

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.

• Rugged, plastic mounting base.

• Contemporary white finish complements almost any decor.

Contents

General ............................................................................. 1

Features ............................................................................ 1

Specifications .................................................................... 2

Ordering Information ......................................................... 2

Installation ......................................................................... 3

Settings and Adjustment ................................................... 4

Checkout ........................................................................... 5

Operation .......................................................................... 6

X-XX UL

T4398A,B HIGH PERFORMANCE ELECTRIC HEAT THERMOSTATS

SPECIFICATIONS

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.

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, 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 fieldselection of minimum and maximum temperature settings.

Temperature Setting Range:

50° to 80°F (10° to 25°C).

Table 1. Thermostat Specifications.

Model

Number Switching

T4398A Spst; makes single line break on

temperature fall.

T4398B Dpst; makes double line break

with setting knob at OFF position.

Temperature Rating

°F (°C) Finish Includes

50 to 80 (10 to 25) White Cover thermometer, temperature

range stops and locking cover.

50 to 80 (10 to 25) White Cover thermometer, temperature

range stops and locking cover.

ORDERING INFORMATION

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 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.

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T4398A,B HIGH PERFORMANCE ELECTRIC HEAT THERMOSTATS

FRONT VIEW SIDE VIEW

•

˚F

2-7/8 (73)

4-3/8 (111)

1-3/4

(48)

1-1/2

(39)

3/4

(19)

1/2 (13)

2-1/8

(54)

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 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.

not

place your old

3-1/4

(83)

M5795A

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.

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

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.

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 can cause serious injury or death.

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 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.

 Tu rn 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.

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