Instruction Manual for Honeywell models including: Honeywell, Communicating, Fan Coil, Thermostat, TF428WNM, TF428WNU

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TF428WNM/U - markus.ro

1 General The TF428WNM/U communicating thermostat is designed for 3-speed fan and valve control in fan coil system, including: 2-pipe cooling only/heating only/manual changeover 4-pipe cooling/heating manual/automatic changeover Ventilation mode

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TF428WNM/U
Communicating Fan Coil Thermostat

SPECIFICATION DATA

General
The TF428WNM/U communicating thermostat is designed for 3-speed fan and valve control in fan coil system, including:  2-pipe cooling only/heating only/manual changeover  4-pipe cooling/heating manual/automatic changeover  Ventilation mode  Manual or automatic 3-speed fan control  Water valve on/off control
The TF428WNM/U is available in Modbus RTU protocol and can be easily integrated into building automation system.
Features
 RS485 interface in Modbus RTU slave mode  Memorized time off  Cycle Per Hour (CPH)  Random startup  LCD display with simple user interface  Room temperature or setpoint temperature display
selectable  Manual or automatic fan speed selectable  Temperature units in either °C or °F  User setting can be stored when power loss  Freeze protection function available  Keypad lock options

Specifications

Physical Layer

EIA485

Protocol

Modbus RTU

Baud rate

4800/9600(Default)/19200

Parity

None

Error checking mechanism CRC

Rated voltage & Frequency 220/230VAC, 50/60Hz

Power consumption

<2W

Control

PI, On/off output

Accuracy

±1°C at 21°C

Auto cycle times

100,000 times

Manual cycle times

10,000 times

Protection class

IP20

Setpoint range

10 ~ 32°C

Display range

0 ~ 37°C

Ambient operating limits 0~ 49°C

Ambient storage limits

-30 ~ 60°C

Humidity limits

5~90% RH, non-condensing

Action Type:

1

Pollution Degree

2

Protection against electric shock class Class II

Electronic control software class

Class A

Rated impulse voltage:

2500V

Maximum temperature For relay wiring

155°C

Wire sectional area (Recommendation)

1.0~1.5mm2

Applied altitude up to 2000m above sea level

Rating capacity

Working current for the whole product : 4(3)A

4A: When the load of the thermostat is resistance

3A: When the load of the thermostat is inductance

For Fan load 3(2)A

3A:when the load is resistance;

2A:When the load is inductance

For Valve load 2(1)A

2A: when the load is resistance;

1A: when the load is inductance

The valve need have overtravel-limit organ to turn off the

load.

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Model Selection
Model Number Backlight

TF428WNM/U

White

Application
2-pipe/4-pipe FCU application

Power Supply
220/230Vac; 50/60Hz

Ventilation Mode
Y

Package Unit Package

Product Design
Thermostat appearance

Dimensions (mm)

LCD display

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Function
Valve Control
Thermostat measures the room temperature via integrated

Backlight
To turn on the backlight, press any key. The backlight will timeout 8 seconds after the last key is pressed. When in ISU or Installation test mode, the backlight will timeout 60 seconds after the last key is pressed.

sensor and maintains the setpoint by delivering on/off valve control command output.

Keypad Lockout

The fan setting can be selected as manual or automatic 3speed operation. When in "manual" mode, the fan is switched to the selected speed via control output FH (high), FM (Medium) , FL (Low).
When in "auto" mode, fan speed depends on the difference

Keypad lockout can be set in ISU or over Modbus. The default status is "all keys available". Keypad lock function can be se-
lected as "mode button locked out", "Fan and mode buttons locked out", "all buttons (except power button) locked out" and "all buttons locked out".

between room temperature and setpoint. When room tempera-

ture reaches the setpoint, the valve will be closed, and the fan will be closed in the meanwhile.

Temperature Display
The displayed temperature can be set to room temperature or setpoint. The setting can be changed during ISU (Installation

Set Up) process.

Difference between RT and SP

COOL

Fan Speed is high or off
2
Fan Speed is medium or off
1
Fan Speed is low or off
Fan Speed is low or off
-1
Fan Speed is medium or off
-2
Fan Speed is high or off

Setpoint

HEAT

Fig. 1. Fan Speed Ramping Control Algorithm

Cycle Per Hour (CPH)
CPH function enables the thermostat to open the valve several times per hour as the room temperature approaches to the sepoint. The value can be changed in the ISU, the default values are 4 for heating and 3 for cooling.
Operating Mode
Comfort Mode
In comfort mode, the setpoint and fan speed can be changed by pressing corresponding buttons. Comfort mode including 2pipe cooling only/heating only/manual changeover and 4-pipe manual /auto changeover applications.

Memorized Time Off
The time off feature will automatically turn off the thermostat after a selectable amount of time. To change the time setting, press and hold the power button for more than 3 seconds and press "up" and "down" button to change the value when the thermostat is working .
NOTE: The setting range is from 0 to 12 hours. The step is 1 hour and the default value is 0.

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Ventilation Mode
Press "mode" button to enter "ventilation" mode. In "ventilation" mode, no output for valve while the fan will operate at selected fan speed.

Freeze Protection Mode
Freeze protection can be selected as disabled or enabled (default) in the ISU or over Modbus. In freeze protection mode when thermostat is off and the temperature is below 6°C , the thermostat will activate heating mode until the temperature rises to 8°C .

Installation and Wiring
TF428WNM/U can be installed in standard 86 size junction box directly.
The screws must be locked tightly to avoid wire break off from the terminals. The temperature of mounting box and wall should be in the operating temperature range.

1

2

3

4

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Wiring Diagram
2- pipe application
Fig. 2. Honeywell VC4013/VN4013/VS4016 Wiring

Terminal Designations

Terminal Description

D-

Modbus 485-

D+ Modbus 485+

FL

Low speed fan

FM Medium speed fan

FH High speed fan

2-pipe application_VC6013: valve

V2

close 4-pipe application_VC4013: cooling

valve open

2-pipe application_VC4013/VC6013:

V1

valve open 4-pipe application_VC4013: heating

valve open

L

Live wire

N

Neutral wire

Fig. 3. Honeywell VC6013/VN6013 Wiring
4-pipe application

Fig. 4. Honeywell VC4013/VN4013/VS4016 Wiring Note: when in 4-pipe application, the thermostat can not be connected with Honeywell VC6013/VN6013 series motorized valve
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ISU (Installation Setup)
Press and hold the "mode" and "up" buttons together for more than 3 seconds to enter or exit ISU. Change the ISU code by pressing the "mode" button and then change the option setting by pressing the "up" and "down" button refer to the following introduction.

ISU Code

Description

0 Modbus Address

1 System Type

2 Temp. Scale 3 Fan Control Type

Options
1~64 1(Default) 0 Heating only 1 Cooling only 2 Two pipes heating/cooling manual (Default) 4 Fur pipes manual 5 Four pipes auto 0 °F 1 °C (Default)
0 Auto only 1 Manual only (3 speed: LowMedHighLow) 2 Users can choose auto or manual (Default)

1ºC (2ºF)

4

Switching Differential for 4 pipe Auto Changeover With Single Setpoint

1.5ºC (3ºF)(Default) 2ºC (4ºF)

3ºC (5ºF)

5 CPH (Heat)

1~12 4(Default)

6 CPH (Cool)

7

Display Temp. Adjustment

8 Temp. Display

9

Heating Range Stops

10

Cooling Range stops

1~6 3(Default)
-2~2°C, 0.5°C. Default 0°C (-4~4°F, 1°F. Default 0°F)
0 Room temp. (Default)
1 Setpoint
10~32°C. Default 32°C (50~90°F. Default 90°F) 10~32°C Default 10°C (50~90°F. Default 50°F)

ISU Code

Description

Options

0 All keys are available (Default)

1 Mode button locked out

11 Keypad Lockout

2 Fan and mode buttons locked out
3 All buttons locked out except power button

4 All buttons are locked

0 Disabled 12 Freeze Protection
1 Enabled (Default)

13

Power Recovery Status

0 OFF 1 Previous status (Default)

0 9600( Default)

14 Modbus Baud Rate 1 4800

2 19200

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Modbus Address Table
When the thermostat is integrated into building automation system. Please make configuration refer below list.

Address Registers
01
02

Parameters Power Switch Room Temperature

Properties and Value 0-Off;1-On Room temperature value

Properties R/W R

03

Temp. Scale

04

Setpoint

05

Fan Speed

0-°F;1-°C

R/W

Set temperature value

R/W

0-Auto;1-Low speed;2-Med speed;3-High speed R/W

06

System Mode

0-Ventilation;1-Heating;2-Cooling;3-Auto

R/W

07

V1 Valve Status

08

V2 Valve Status

09

Error Code

10

Fan Status

0-Closed;1-Open

R

0-Closed;1-Open

R

0-None;1-Sensor; 2-EEprom;3-Sensor+

R

EEprom

0-Off 1-Low 2-Med 3-High

R

11

Modbus Address

1~64 1(Default)

R/W

12

System Type

13

Fan Control Type

0-Heating only;1-Cooling only;2-Two pipes

R/W

heating/cooling manual (Default) 4-Four pipes

manual;5-Four pipes auto

0-Auto;1-Manual;2-Auto+Manual (Default)

R/W

14

Switching Differential For 2-1ºC(2ºF); 3-1.5ºC(3ºF); 4-2ºC(4ºF); 5-3ºC(5ºF); R/W

4 pipe Auto Changeover

With Single Setpoint

15

CPH (Heat)

1-12 4 (Default)

R/W

16

CPH (Cool)

17

Display Temp.

Adjustment

1-6 3 (Default)

R/W

0~8(-2~2C) step1(0.5C) 4 (Default)

R/W

0~8(-4~4F) step1(1F) 4 (Default)

18

Temp. Display

0­ Room temp. (Default);1-Setpoint

R/W

19

Heating Range Stops

100~320 (10~32C) step5(0.5C) 320 (Default) R/W

500~900(50~90F) step10(1F) 900 (Default

20

Cooling Range Stops

100~320 (10~32C) step5(0.5C)100 (Default R/W

500~900(50~90F) step10(1F) 500 (Default

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Address Registers
21

Parameters Keypad Lockout

22

Freeze Protection

23

Power Recovery Status

24

Modbus Baud Rate

Properties and Value

Properties

0- All keys are available (Default);1­ Mode but- R/W ton locked out;2- Fan and mode buttons locked out;3- All buttons locked out except power but-
ton;4- All buttons locked out

0- Disabled;1- Enabled (Default)

R/W

0- OFF;1-Previous Status (Default)

R/W

0-9600 (Default);1-4800;2-19200

R/W

25

Time Off Time

0~12 Step 1 Unit :h

R/W

26

Remain Time To Turn Off Remain time to turn off

R

Note: 1 The parameters are registers,16 bit integer. Modbus Function is 0x01(read),0x06(write single),0x10(write multiple).
2 Max. 31 devices in one network.

Automation and Control Solutions Honeywell Environmental and Combustion Controls (Tian Jin) Co., Ltd No. 158, NanHai Road Tianjin Economic-Technological Development Area Tianjin, 300457, P.R.C.
Subject to change without notice.

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Microsoft Publisher 2013