Honeywell T6861-F Manual de usuario

T6861-F Large LCD Digital Thermostat

230 VAC , Floating output

2-pipe fan coil control

Data sheet

Features

• Super modern appearance design, suitable for

ofce, hotel and residential building

• Horizontal and vertical model available for variant

application

• Slim design, direct installation on 86 size box

• Stylish and elegant blue/green backlight with white

• 2-pipe integrated into one unit with easy conguration

• Big LCD display with English and icons

• Easy to install and set-up

• Time on/off function

• Selectable room temperature or setpoint temperature

display

• Manual or automatic fan speed selection

• Remote sensor function

• Adjustment of display room temperature

• Temperature unit either oC or oF

• User setting can be kept when power off

• Freezing protection function available

• Lock or unlock keys or part of keys in Installer Set-up

• Heat and cool setpoint limitation for energy saving

Model summary

Application

T6861-F digital thermostats are designed for

application of 3-speed fan and oating valves in fan

coil system.

Including:

2-pipe cool only/heat only/manual changeover

Ventilation mode

Manual or automatic 3-speed fan control

oating valve control

Fan speed can be selected to automatic or manual

3-speed control mode.

In ventilation mode, fan only support manual speed

control.

Note: Horizontal models are taken as samples for display, operation and installation pictures shown in below parts.

Model Horizontal/

Vertical Backlight Color Ring Time

on/off

2-pipe/

4-pipe

Power supply

(V)

Remote

sensor Ventilation Manual/

Automatic Fan

Remote

Setback

T6861H2WB-F Horizontal Blue White Y2 230 Y Y Y N

T6861V2WB-F Vertical Blue White Y2 230 Y Y Y N

T6861H2WG-F Horizontal Green White Y2 230 Y Y Y N

T6861V2WG-F Vertical Green White Y2 230 Y Y Y N

Temperature display

The displayed temperature can be set to acquired

room temperature or setpoint. The setting can be

made during Installer Set-Up process.

Mechanical design

Thermostat appearnce

LCD display

Function

Floating Valve control

Thermostat acquires the room temperature via its

integrated sensor or external temperature sensor

and maintains the setpoint by delivering floating

valve control commands 3-position outputs.

Fan Operation

Fan can be selected as manual or automatic 3-speed

operation. In Manual mode, the fan is switched to

the selected speed via control output Gh, Gm, Gl.

While in automatic mode, fan speed depends on the

difference between room temperature and setpoint.

When room temperature reaches setpoint, valve will

be closed and meanwhile, fan will be closed either.

Time on/off

If the thermostat is off, hold power button for 3

seconds, system will be time on mode. If the

thermostat is on, hold power button for 3 seconds,

system will be time off mode.

The setting range is from 0 to 12 hours. The step is

0.5 hour with the default time is 0.

50030722-001 REV.A

DIGITAL DISPLAY

FAN BUTTON

POWER BUTTON

MODE BUTTON

UP BUTTON

DOWN BUTTON

PRESS THE FAN BUTTON TO SELECT

LOW, MED, HIGH OR AUTO

PRESS THE MODE BUTTON TO SELECT

HEAT, COOL, AUTO OR VENT

Fan speed ramping control algorithm

Open Degree of Valve

30%

70%

Fan speed is high

Fan speed is medium

Fan speed is low

100%

Backlight

Any key press will activate the backlight. Backlights

will timeout 8 seconds after last key press. When

in Installer Set-up and Installer test mode, the

backlight will timeout 60 seconds after last key

press.

Keypad lock

Keypad lock can be set in ISU with default status

is all keys available. You may change into mode

button locked out, Fan and mode buttons locked out

and All buttons locked out by changing the ISU.

Ventilation mode

Press mode button to enter ventilation mode. In

ventilation mode, no output for oating valve while

the fan will operate according to selected fan speed.

Remote temperature sensor

T6861 provides control either depending on the

acquired room temperature or depends on the return

air temperature. The model of remote temperature

sensor is (NTC20K).

Operating modes

The following operating modes are available:

Comfort mode

In comfort mode, the setpoint can be changed by

pressing up and down button. Different applications

include cool only, heat only and manual heat/cool

changeover.

Freezing protection mode

Freezing protection can be selected as disabled

(default) or enabled. In freezing protection mode

(no such mode in cool only application), when

thermostat is in OFF mode while the acquired

temperature is below 6oC, the thermostat will start

heat mode until the temperature rises to 8oC or the

thermostat is turned on.

On/off mode

Pressing power button can switch between on and

off mode.

Technical specication

Power supply 230 (+10%, -10%) VAC

Frequency 50Hz

Control algorithm PI, oating output

Accuracy +/-1oC at 21oC

Rating capacity For 230V power supply:

10(2)A for fan load, 3(1)A for valve

Cycle times 100,000 times

Setpoint range 10~32oC

Display range 0~37oC

Installation Installed on 86×86mm

junction box or 3×3 inch.

Protection Class IP20

Environmental Operation temperature -18~49oC

Conditions Shipping temperature -35~65oC

Relative humidity 5~90%,

noncondensing

INDICATES THERMOSTAT

HAS BEEN SET TIME OFF

TEMPERATURE

SETTING

PRESS THIS BUTTON TO

RAISE THE TEMPERATURE

SETTING

INDICATES THERMOSTAT

HAS BEEN SET TIME OFF

Application 3: 2 pipes 1 stage Heat or 1 stage Cool

MCO wiring diagram

Application 2: 2 pipes Cool only wiring diagram

1 Pull wires through wire hole.

Loosen screw terminals, insert wires into terminal

Block, then retighten screws.

Terminal Designations

Install the thermostat about 5 feet (1.5m) above the

oor in an area with good air circulation at average

temperature.

Do not install in locations where the thermostat can

be affected by:

• Drafts or dead spots behind doors and in corners

• Hot or cold air from ducts

• Sunlight or radiant heat from appliances

• Concealed pipes or chimneys

• Unheated/uncooled areas such as an outside wall

Installation & Commissioning

Figure 0-2 Typical wiring for 3-wire control in 2 pipe cooling only

Figure 0-3 Typical wiring for 3-wire control in 2 pipes 1H1C

Wiring diagram

Application 1: 2 pipes heat only wiring diagram

Figure 0-1 Typical wiring for 3-wire control in 2 pipe heating only

Terminal Description

L Line voltage Power

Ch/Cc Valve close

W/Y Valve open

NLine voltage ground

Gl Low speed fan relay

Gm Medium speed fan relay

Gh High speed fan relay

Sc Ground for remote sensor

Rs Remote sensor

Heat valve

Fan

remote sensor

Cool valve

Fan

remote sensor

valve

Fan

remote sensor

2 Push the Power box into the junction box.

5 Align the 4 tabs on the Back cover with corresponding

slots on the back of the thermostat, and then push it

until the thermostat snaps in place.

4 Insert the cable into connector on circuit board of

thermostat.

3 Place Back cover over junction box, insert and

tighten mounting screws.

Installer system test

After completing the installer setup above, press the

button again to begin a system test

Follow the procedure below to test the heating and

cooling and fan system.

System

System test No.

Press and hold and buttons 3 seconds to enter

test mode.

Press or button to change system status.

Press button to advance to next test number.

Press and button hold to terminate system test

at any time.

System Test System Status

10 Valve open degree

0 Stop

1 Open

2 Close

40 Fan 0 Fan off

1 Low speed Fan on

2 Medium speed Fan on

3 High speed Fan on

70 Thermostat information (for reference only)

71 Software revision number (major revisions)

72 Software revision number (minor revisions)

73 Conguration identication code (major)

74 Conguration identication code (minor)

75 Production conguration date code (week)

76 Production conguration date code (year)

Installer Set-Up (ISU) setting

Press and simultaneously for 3 seconds to

enter ISU as below:

Press or to change settings

Press to advance to next function

Press and hold and buttons 3 seconds to

exit and save settings

Number

Setting

Troubleshooting Tips

If… Then…

Valve doesn't

open

♦ Press Up and Down button and hold them about 3s.

♦ Press Mode button to adjust the item to "10", and

Press the Up button to modify the value to "2".

♦ Check the actuator. It must turn on slowly.

♦ Check the valve, if it still doesn't open, please call

your supplier.

The fan doesn’t

work.

♦ Check whether the Fan mode is set to Auto

♦ Check whether valve is open

The Mode

button doesn’t

work.

♦ Check whether the keypad is locked or not.

♦ Check whether the thermostat is off.

The Fan button

doesn’t work.

♦ Check whether the keypad is locked or not.

♦ Check whether the thermostat is off.

The Up or Down

button doesn’t

work.

♦ Check whether the keypad is locked or not.

♦ Check whether the thermostat is off.

Setup Function Settings & Options

ISU Code Description Possible Options

1System Type

0 Heat only

1 Cool only

2 Two pipes 1H1C manual (Default)

3Floating Actuator

Running Time

24 (120 seconds Default)

Range 6~32 (30~160 seconds)

5 Remote Sensor

0 Onboard Sensor (Default)

1 Remote sensor

(NTC20K, T7770A1006)

9 Temperature Scale

0 ºF

1 ºC (Default)

10 Fan Control Type

0 Auto Only

1 Constant Only

2 Both (Default)

18 Display Temperature

Adjustment

-2 ºC (-4 ºF)

-1.5 ºC (-3 ºF)

-1 ºC (-2 ºF)

-0.5 ºC (-1 ºF)

0 ºC (0 ºF) (Default)

0.5 ºC (1 ºF)

1 ºC (2 ºF)

1.5 ºC (3 ºF)

2 ºC (4 ºF)

19 Temperature Display

Mode

0 Display Room Temperature

1 Display Set point

2 Display Both (Default)

20 Heating Range

Stops

10-32 ºC Default 32 ºC

(50-90 ºF Default 90 ºF)

21 Cooling Range

Stops

10-32 ºC Default 10 ºC

(50-90 ºF Default 50 ºF)

22 Keypad Lockout

0 All keys are available (Default)

1 System button is Locked out

2 Fan and System button are Locked out

3 All buttons are locked out

27 Freeze Protection

0 Disabled

1 Enabled

Dimension

Horizontal model

Vertical model

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