background image

PRODUCT DATA

68-0185-2

® U.S. Registered Trademark
Copyright © 2000 Honeywell •  All Rights Reserved 

T8411R Electronic

Heat Pump Thermostat

APPLICATION

The T8411R Thermostat provides 24V control of a two-stage 

heating and one-stage cooling heat pump system with manual 
changeover from heat to cool and second stage auxiliary heat. 

First stage heating and cooling cycle rates are fixed at 3 cph. 

Second-stage heating cycle rate is selectable at 3, 6, or 9 cph. 
Temperature indication can be set for °F or °C. 

FEATURES

• Attractive styling complements any decor to the 

homeowner’s delight.

• Ease-of-use means fewer homeowner questions and 

increased homeowner satisfaction.

• Large display for quick easy readability.
• Conveniently sized 5-1/2 in. x 3-1/2 in. thermostat 

makes it easy to install in a variety of locations.

• Keys are located by the display for easy access.
• Fan and system switches are located on the lower 

edge to eliminate accidental setting changes.

• Easy installation, setup and self-test saves installer 

time and increases their productivity.

• Manual changeover from heat to cool eliminates 

unexpected system operation.

• °F or °C temperature display for added model 

flexibility.

• Selectable second-stage heating cycle rate (3, 6 or 9 

cph). First-stage heating cycle rate is fixed at 3 cph.

• Cooling cycle rate is fixed (3 cph), the standard setting 

for compressors, for speedy installation.

• Setpoints are permanently held in memory (no 

batteries used) and retained during power outages for 
increased installer and homeowner convenience.

• Em Ht and Aux Ht indicators let the homeowner know 

when these modes are active.

Contents

Application ........................................................................

1

Features ...........................................................................

1

Specifications ...................................................................

2

Ordering Information  ........................................................

2

Installation ........................................................................

3

Settings and Adjustments .................................................

6

Operation ..........................................................................

7

Checkout ..........................................................................

8

Troubleshooting ................................................................

9

Содержание HEAT PUMP THERMOSTAT T8411R

Страница 1: ...in a variety of locations Keys are located by the display for easy access Fan and system switches are located on the lower edge to eliminate accidental setting changes Easy installation setup and self test saves installer time and increases their productivity Manual changeover from heat to cool eliminates unexpected system operation F or C temperature display for added model flexibility Selectable...

Страница 2: ...1R TRADELINE model includes a thermostat wallplate for wiring and mounting thermostat and owner s guide Power T8411R 24 Vac nominal 18 to 30 Vac 50 60 Hz Electrical Ratings First Stage Heating 0 02 to 1 5A run 7 5A inrush Second Stage Heating 0 02 to 1 5A run 3 5A inrush Cooling 0 02 to 1 5A run 7 5A inrush Fan 0 02 to 0 5A run 2 5A inrush Emergency Heat Output E 0 02 to 1 5A run 3 5A inrush Heati...

Страница 3: ...on Install the thermostat about 5 ft 1 5m above the floor in an area with good air circulation at average room temperature See Fig 2 Do not install the thermostat where it can be affected by drafts or dead spots behind doors and in corners hot or cold air from ducts radiant heat from the sun or appliances concealed pipes and chimneys unheated uncooled areas such as an outside wall behind the therm...

Страница 4: ...ate and con nect the system wires See Fig 4 2 Securely tighten each terminal screw 3 Push the excess wire back into the hole 4 Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat Mounting Thermostat to Wallplate 1 Engage the tabs at the top of the thermostat and wall plate 2 Swing down the thermostat and press the lower edge of the thermostat onto the wallpla...

Страница 5: ... TERMINALS SYSTEM SWITCH HEAT OFF COOL R W2 L B O Y EM HT W1 E AUXILARY HEAT RELAY CHANGEOVER VALVE HEAT CHANGEOVER VALVE COOL COMPRESSOR CONTACTOR COMPRESSOR CONTACTOR HEAT FAN RELAY RELAY EMERGENCY HEAT RELAY G C THERMOSTAT LOGIC THERMISTOR SENSOR POWER SUPPLY ON AUTO STAGE 2 RELAY STAGE 1 RELAY FAN SWITCH M11333A 3 3 M18577 SYSTEM Cool Off Heat Em Ht Auto On FAN DASHED LINES INDICATE TABS ON BA...

Страница 6: ...heating load Set Temperature Setpoint NOTE Temperature setpoint range is 40 to 99 F 4 to 39 C The temperature setpoint and the room temperature are shown separately on the display The indicator points to Set when the temperature setpoint is displayed and to Room when the room temperature is displayed To set temperature setpoint 1 Select Heat or Cool by sliding the SYSTEM switch in the lower right ...

Страница 7: ... displayed A typical example is shown but CC varies by model This informa tion is for factory use only 10 Press to save all changes exit installer setup mode and return to normal operation NOTE After exiting installer setup mode change the set point to the desired room temperature OPERATION The T8411R Thermostat provides two stage heat and one stage cool temperature control with proportional plus ...

Страница 8: ...ting and cooling Table 1 Sequence of Operations a The O terminal is powered continuously in cooling the B terminal is powered continuously in heating and the L terminal is powered continuously in emergency heat as a function of the system switch position even without a call for heat or cool CHECKOUT Heating 1 Slide the SYSTEM switch to Heat and the FAN switch to Auto 2 Press and hold the s key to ...

Страница 9: ... THERMOSTAT PARTIAL DISPLAY INOPERATIVE THERMOSTAT SEE THE SETTINGS AND ADJUSTMENTS SECTION FOR INSTRUCTIONS ON INSTALLER SETUP MODE STILL IN INSTALLER SETUP MODE RECONFIGURE THE DISPLAY SEE SETTINGS AND ADJUSTMENTS SECTION TEMPERATURE DISPLAY IS INCORRECT THERMOSTAT IS CONFIGURED FOR F OR C DISPLAY CHECK THAT C TERMINAL IS CONNECTED TO THE SYSTEM TRANSFORMER CHECK POWER TO HEATING AND COOLING EQU...

Страница 10: ...68 0185 2 10 ...

Страница 11: ...11 68 0185 2 ...

Страница 12: ...ilding Control Home and Building Control Honeywell Honeywell Limited Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley MN 55422 Scarborough Ontario M1V 4Z9 Printed in U S A on recycled paper containing at least 10 post consumer paper fibers ...

Отзывы: