Honeywell T4398A Product Data
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Honeywell T4398A Product Data

Precision electric heating thermostat
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APPLICATION
The T4398 Electric Heating Thermostat provides precise,
accurate line voltage control of electric heating equipment. A
snap action switch makes the heating circuit on temperature
fall. B models feature double-line break in the Off position.
® U.S. Registered Trademark
Copyright © 2002 Honeywell • All Rights Reserved
T4398A,B Precision
Electric Heating Thermostat
FEATURES
• Controls both fan-forced and baseboard electric
heaters.
• Vapor-filled dual diaphragm sensing element provides
high-temperature sensitivity with minimum droop.
• Canadian Standards Association (CSA) Performance
Certified up to 20A.
• CSA Certified, UL Listed up to 5 kW at 277 Vac.
• Long-life, industrial-grade Micro Switch™ mechanism.
• Rugged-engineered, plastic mounting base with
captive mounting screw.
• Color-coded flyleads compatible with aluminum wire
for quick installation.
• Replaces any standard wall-mounted electric heat
thermostat.
• Contemporary white styling.
• Operating temperature range of 50°F to 80°F (10° C to
30° C).
• Celsius and fahrenheit models available.
• Optional thermometer.
• Altitude compensation feature.
• Frost protection setting (A models only).
• Optional locking cover and range stops available.
PRODUCT DATA
69- 1604

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Summary of Contents for Honeywell T4398A

  • Page 1 B models feature double-line break in the Off position. • Frost protection setting (A models only). • Optional locking cover and range stops available. ® U.S. Registered Trademark Copyright © 2002 Honeywell • All Rights Reserved 69- 1604...

  • Page 2: Specifications

    T4398A,B PRECISION ELECTRIC HEATING THERMOSTAT SPECIFICATIONS Models: Approval Ratings: T4398A: Makes heating circuit on temperature fall. With Underwriters Laboratories Inc: Listed; file no. E47434, setting knob at far left (counterclockwise) position, pro- guide no. XAPX. vides calibration-free frost protection setting of 40°F Canadian Standards Association: File no.

  • Page 3: Installation

    T4398A,B PRECISION ELECTRIC HEATING THERMOSTAT INSTALLATION NOTE: Make line voltage wiring connections directly to the WARNING leadwires installed on the thermostat, using wire con- nectors approved for the number and size of conduc- 120-277 Volt Line Voltage Hazard. tors. Can cause serious injury or death.
  • Page 4 T4398A,B PRECISION ELECTRIC HEATING THERMOSTAT T4398B WIRE WALL THERMOSTAT BASE ELECTRIC HEATER OUTLET SETTING DIAL SOLDERLESS INDICATOR CONNECTORS (HOT) POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. USE SPECIAL SERVICE CO/ALR SOLDERLESS CONNECTORS MOUNTING WHEN CONNECTING ALUMINUM CONDUCTORS OR A FIRE SCREWS (2) HAZARD MAY RESULT.

  • Page 5: Operation And Checkout

    T4398A,B PRECISION ELECTRIC HEATING THERMOSTAT OPERATION AND CHECKOUT After the thermostat is installed and wired, check out normal operation as follows: ELEVATION 1. Turn setting dial fully clockwise until the switch clicks CITIES WITH (SEA LEVEL) and the electric heater starts to heat.

  • Page 6: Security Features

    T4398A,B PRECISION ELECTRIC HEATING THERMOSTAT THERMOSTAT THERMOSTAT BASE BASE SETTING KNOB AT 12 O'CLOCK POSITION SCALE RING LOCKING COVER THERMOSTAT CLIP COVER SETTING KNOB LOCKING COVER SCREW M5796 Fig. 7. Calibrating the thermostat. ALLEN WRENCH M5798 Security Features Fig. 8. Installing locking cover.
  • Page 7 T4398A,B PRECISION ELECTRIC HEATING THERMOSTAT Frost Protection (T4398A) NOTE: To prevent heat from turning on below 40°F (4°C), turn off the circuit at the breaker panel, or install a When the ambient temperature falls to 40°F (4°C), the vapor T4398B.
  • Page 8 T4398A,B PRECISION ELECTRIC HEATING THERMOSTAT $XWRPDWLRQ DQG &RQWURO 6ROXWLRQV +RQH\ZHOO +RQH\ZHOO /LPLWHG+RQH\ZHOO /LPLWpH  'RXJODV 'ULYH 1RUWK  '\QDPLF 'ULYH *ROGHQ 9DOOH\ 01  6FDUERURXJK 2QWDULR 09 = Printed in U.S.A. on recycled 69-1604 G.H. 3-02 www.honeywell.com/yourhome paper containing at least 10%...

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T4398b

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