Honeywell HEAT PUMP THERMOSTAT T8411R Bedienungsanleitung

® U.S. Registered Trademark

INSTALLATION INSTRUCTIONS

69- 1481- 1

T8411R Electronic

Heat Pump Thermostat

The T8411R Heat Pump Thermostat provides 24V

control of two-stage heating and one-stage cooling heat

pump system with manual changeover from heat to cool.

First stage heating and cooling cycle rates are fixed at

3 cph. Second stage heating cycle rate is selectable at

3, 4, 5, 6, or 9 cph. Temperature indication can be set for

°F or °C.

The T8411R Heat Pump Thermostat is powered directly

from the system transformer. Batteries are not required

because setpoints are held permanently by non-volatile

memory.

The T8411R TRADELINE® model includes a thermostat,

wallplate (for wiring and mounting thermostat), and

owner’s guide. A 7 3/8 in. x 5 3/4 in. (188mm x146 mm)

decorator cover plate (for covering wall marks) is

available separately. Order Honeywell part no. 209649A

(taupe color).

MERCURY NOTICE

If this control is replacing a control that contains

mercury in a sealed tube, do not place your old

control in the trash.

Contact your local waste management authority

for instructions regarding recycling and the

proper disposal of an old control containing

mercury in a sealed tube.

INSTALLATION

When Installing this Product…

1. Read these instructions carefully. Failure to follow

them could damage the product or cause a hazard-

ous condition.

2. Check the ratings given in the instructions and 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.

CAUTION

Electrical Shock or Equipment Damage

Hazard.

Can shock individuals or short equipment

circuitry.

Disconnect power supply before installation.

Location

Install the thermostat about 5 ft (1.5m) above the floor in

an area with good air circulation at average temperature.

See Fig. 1. 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 thermostat.

This thermostat is a precision instrument and was

carefully adjusted at the factory. Handle it carefully.

Mounting Wallplate to Wall

IMPORTANT

Level only for appearance. The thermostat func-

tions normally even when not level.

Mount wallplate, T8411R and the screws provided (see

Fig. 2) as follows:

1. Place the wallplate at the desired location on the

wall.

2. Use a pencil to mark the mounting holes.

3. Remove the wallplate from the wall and drill two

3/16 in. holes in the wall (if drywall) or two 7/32 in.

holes for firmer material such as plaster or wood.

4. Gently tap the anchors (provided) into the holes

until flush with the wall.

5. Position the wallplate over the holes.

6. Pull the thermostat wire through the wallplate

entrance hole.

7. Fasten the wallplate to the wall using the anchors

and screws provided.

T8411R ELECTRONIC HEAT PUMP THERMOSTAT

69-1481-1 2

Fig. 1. Typical location of thermostat.

Fig. 2. Mounting wallplate to wall.

Wiring

IMPORTANT

Use an 18-gauge maximum wire for wiring the

T8411R Thermostat.

All wiring must comply with local electrical codes and

ordinances.

CAUTION

Electrical Shock or Equipment Damage

Hazard.

Can shock individuals or short equipment

circuitry.

Disconnect power supply before installation.

The shape of the terminals permits insertion of straight or

wraparound wiring connections; either method is

acceptable. See Fig. 3.

Fig. 3. Wiring connections.

NOTE: To ensure proper mounting of thermostat,

restrict all wiring to the shaded area. See Fig. 4.

5 FEET

[1.5 METERS]

YES

M11338

M12202A

WALL WALL

ANCHORS (2)

WALLPLATE

WHEN USING WALL ANCHORS, DRILL 3/16 INCH

HOLES FOR DRYWALL, 7/32 INCH HOLES FOR

PLASTER OR WOOD.

MOUNTING

SCREWS (2)

TERMINAL

SCREW

M11334A

FOR STRAIGHT INSERTION

STRIP 5/16 IN. (8 MM)

FOR WRAPAROUND

STRIP 7/16 IN. (11 MM)

NOT ALL MODELS HAVE BOTH O AND B TERMINALS.

T8411R ELECTRONIC HEAT PUMP THERMOSTAT

3 69-1481-1

Fig. 4. Restrict wiring to shaded area.

Refer to Fig. 5 for typical wiring hookups. A letter code is

located near each terminal for identification.

1. Loosen the terminal screws on the wallplate and

connect the system wires. See Fig. 5.

2. Securely tighten each terminal screw.

3. Push the excess wire back into the hole.

4. Plug the hole with nonflammable insulation to pre-

vent drafts from affecting the thermostat.

Mounting Thermostat to Wallplate

1. Engage the tabs at the top of the thermostat and

wallplate.

2. Swing down the thermostat and press the lower

edge of the thermostat onto the wallplate to latch.

See Fig. 6.

Fig. 5. T8411R two-stage heat and one-stage cool wiring diagram with manual changeover.

KEEP WIRING IN

SHADED AREA

MOUNTING

SCREW HOLE

MOUNTING

SCREW HOLE

WIRING ENTRANCE

HOLE

M11331A

NOT ALL MODELS HAVE BOTH O AND B TERMINALS.

(HOT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

REMOVE JUMPER, WHEN SUPPLIED, FOR SYSTEMS WITH SEPARATE HEATING COMPRESSOR CONTACTOR (W1 SEPARATE FROM Y).

NOT ALL MODELS HAVE BOTH O AND B TERMINALS.

SYSTEM

SWITCH

HEAT

OFF

COOL

EM. HT.

AUXILARY

HEAT RELAY

CHANGEOVER

VALVE HEAT

CHANGEOVER

VALVE COOL

COMPRESSOR

CONTACTOR

COMPRESSOR

CONTACTOR

HEAT

FAN RELAY

RELAY

EMERGENCY

HEAT RELAY

THERMOSTAT

LOGIC

THERMISTOR

SENSOR

POWER

SUPPLY

AUTO

STAGE 2 RELAY

STAGE 1 RELAY

FAN SWITCH

M11333A

T8411R ELECTRONIC HEAT PUMP THERMOSTAT

69-1481-1 4

Fig. 6. Mounting thermostat wallplate.

OPERATION

Setting FAN and SYSTEM Switches

Fan and system settings are controlled manually by

using the switches located at the bottom of the

thermostat case. See Fig. 7.

FAN Switch

Fan switch settings are:

On: The fan runs continuously. Use for improved air

circulation and air quality.

Auto: Normal setting for most homes. The fan starts

and stops with the equipment.

Slide the FAN switch in the bottom left corner of the

thermostat to select the desired fan setting.

SYSTEM Switch

System switch settings control thermostat operation as

follows:

Cool: The thermostat controls the cooling system.

Off: Both heating and cooling are off.

Heat: The thermostat controls the heating system.

Em Ht: Thermostat cycles auxiliary heat (W2) and

emergency heat relay (E) as needed to maintain

setpoint. Terminal L is energized continuously.

Fault heat relay is on continuously. Cooling system

is off. Compressor is de-energized.

Slide the SYSTEM switch in the bottom right corner of

the thermostat to select the desired system setting.

Fig. 7. Digital display and system

switches (FAN and SYSTEM).

Em Ht and Aux Ht Indications

The ▲indicator points to either Emergency Heat (Em Ht)

or Auxiliary Heat (Aux Ht) when these modes are active.

Em Ht: The ▲indicator points to Em Ht when the

SYSTEM switch is set at Em Ht.

Aux Ht: The ▲indicator points to Aux Ht when the

auxiliary backup heat is needed to help handle

the heating load.

M18541

SYSTEM

Cool Off Heat Em Ht

Auto On

FAN

DASHED LINES INDICATE TABS

ON BACK OF THERMOSTAT

SYSTEM

Cool Off Heat Em Ht

Auto On

FAN

ENGAGE TABS AT TOP OF THERMOSTAT

WITH SLOTS ON MOUNTING PLATE.

PRESS LOWER EDGE OF

CASE TO LATCH.

EmHt Aux Ht

Set Room

Em Ht Aux Ht

Set Room

SYSTEM

Cool Off Heat EmHt

Auto On

FAN

M18542

TEMPERATURE DISPLAY

INCREASE SETTING

DECREASE SETTING

FAN SWITCH

SYSTEM SWITCH

Em Ht Aux Ht

Set Room

INDICATOR

M18425

Em Ht

T8411R ELECTRONIC HEAT PUMP THERMOSTAT

5 69-1481-1

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 digital 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 corner of the thermostat to the

desired mode. See Fig. 7.

2. To display the temperature setpoint on the digital

display, press either the ▲or ▼key once. The

temperature setpoint is displayed for approxi-

mately five seconds as the indicator points to Set

and flashes.

3. To increase the temperature setpoint press the ▲

key. Each press changes the setpoint one degree;

press and hold to change the setpoint several

degrees.

4. To decrease the temperature setpoint press the ▼

key. Each press changes the setpoint one degree;

press and hold to change the setpoint several

degrees.

Setting °F/°C Indication and Heat Cycle Rate

NOTE: To save changes to the °F/°C indication and the

heat cycle rate, all seven steps must be com-

pleted.

In installer setup mode, steps 2 through 5, each

press of the ▲key momentarily displays 01 and

each press of the ▼ key momentarily displays

02. When the keys are released, these two-digit

codes are no longer displayed.

To set the °F/°C indication and heat cycle rate:

1. If the temperature is displayed in °F, set the tem-

perature setpoint to 52°F. If the room temperature

is displayed in °C, set the temperature setpoint to

11°C.

2. Press the ▲▼ keys simultaneously for more than

one second to light all segments on display and to

enter installer setup mode. When the keys are

released, a two-digit software revision code is dis-

played.

OPTIONAL SYSTEM CHECKOUT

When the heat or cool outputs are turned on, the five-

minute off-timer safety feature is bypassed.

When in steps 2 and 3 only, the

▼

key can be used to

turn heat or cool outputs on and off. Change the

SYSTEM switch setting to test heat or cool outputs. No

action takes place If the system switch is in the Off

position.

The following examples of system settings show a two

digit software code on the display. The code shown is

only an example; codes may vary.

System setting at Heat:

To turn heat on, press the ▼ key.

To turn auxiliary heat on, press the ▼ key.

To turn auxiliary heat off, press the ▼ key a third time.

To turn heat off, press the ▼ key a fourth time.

System setting at Cool:

To turn cool on, press the ▼ key.

To turn cool off, press the ▼ key.

3. Press the ▲key. Factory information is displayed.

A typical example is shown, but information dis-

played varies by model. This information is for fac-

tory use only.

4. Press the ▲key again to display °C or °F.

Set Room

INDICATOR

ROOM TEMPERATURE

SETPOINT TEMPERATURE

M14679

M14680

M14681

M14682

M14683

M18426

M18431

M18432

Aux Ht

M18433

M18434

M18435

M18434

M14688

69-1481-1 G.H. Rev. 2-02 Printed in U.S.A. www.honeywell.com/yourhome

T8411R ELECTRONIC HEAT PUMP THERMOSTAT

Automation and Control Solutions

Honeywell Honeywell Limited-Honeywell Limitée

1985 Douglas Drive North 35 Dynamic Drive

Golden Valley, MN 55422 Scarborough, Ontario

M1V 4Z9

5. Press the ▼ key to change the °C or °F indication.

NOTE: Stage-one heat and cool cycle rates are fixed at

3 cph. Only stage-two heat cycle rates are

selectable.

6. Press the ▲key to display the heat cycle rate of 3,

4, 5, 6, 9 or 12. If the desired cycle is displayed,

see Table 1, press the ▲key to exit the installer

setup mode. To change the heat cycle rate, press

the ▼key to scroll between 3, 4, 5, 6, 9, and 12.

Stop scrolling when the desired rate is displayed.

aHigh efficiency furnace.

bRefer to equipment manufacturer’s instructions.

7. Press the ▲key to display cooling algorithm con-

figuration default.

8. Press the ▲key again to change cooling algorithm

to C1 or C3.

C1 = Standard cooling algorithm.

C3 = Aggressive cooling algorithm (can cause

overshooting).

9. Press the ▲key again. Current configuration (CC)

is displayed. A typical example is shown, but CC

varies by model. (This information is for factory use

only.)

10. Press the ▲key to save all changes, exit installer

setup mode and return to normal operation.

NOTE: After exiting installer setup mode, change the

setpoint to the desired room temperature.

CHECKOUT

Heating

1. Slide the SYSTEM switch to Heat and the FAN

switch to Auto.

2. Press and hold the ▲key to raise the temperature

setting several degrees above the room tempera-

ture. After approximately five minutes, the heating

equipment should start.

3. Press the ▼key to lower the temperature setting

below the room temperature. Heating equipment

should stop.

Cooling

CAUTION

Equipment Damage Hazard.

Operating at too low of an outdoor

temperature may cause compressor damage.

Do not operate cooling if outdoor temperature is

below 50°F (10°C). Refer to manufacturer’s

recommendations.

• For compressor protection, allow the

compressor to remain off for five minutes

before restarting.

1. Slide the SYSTEM switch to Cool and the FAN

switch to Auto.

2. Press the ▼ key to lower the temperature setting

several degrees below the room temperature. After

approximately five minutes, the cooling equipment

and fan should start.

3. Press the ▲key to raise the temperature setting

above the room temperature. Cooling system

should shut down.

Fan

1. Slide the SYSTEM switch to Off and the FAN

switch to On. The fan should run continuously.

2. Slide the FAN switch to Auto. The system turns the

fan on and off with the equipment.

Make certain all equipment responds properly to the

thermostat.

Table 1. Heat Cycle Rates.

System Cycles per Hour

Hydronic heat, condensing gas

furnacea

Gas or oil forced air 6

Electric heat 9

Special applicationsb4, 5, 12

M14689

M14690

M18421

M18420

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