SyxthSense SFT-A24-505, SFT-A24-P506, SFT-A24-506, SFT-A24-P505, SFT-A110/230-505 Product Sheet

Online store: www.syxthsense.com
Enquiries: T: 0844 840 3100 F: 0844 840 3200

PS TH6.95 - 1/6

SFT Series Digital Fan Coil Unit
Controllers

SFT series are elegant fan coil unit controllers with a large clear
LCD screen. The units are operated with five high quality buttons.
The SFT range of fan coil unit controlers is available with a range
of models to suit most applications.

The SFT controllers can be extensively applied for residential,
industrial and commercial environments. The Controllers have
switching rating of up to 16A 230V making them suitable for both
wet systems and electrical heating systems.

Depending on the model, the SFT controllers can operate using
internal or external sensor and have 7 day time programme.

The SFT range has RS485 communication capability making them
ideal for all commercial applications.

Features

• 24VAC/110VAC/230VACPower Supply (depend on models)

• 2-Pipe FCU Systems

• 4-Pipe FCU Systems

• Large Digital Display with Back-Light

• Flush Mounted for Sophisticated Look

• 5+2/7 Day Time Programme ("P"-models)

• Inside Temperature Display

• Celcius / Fahrenheit Display

• 12/24 Hour Time Mode

• Auto/Manual Fan Speed Programmable

Product sheet TH6.95

Controller Type SFT

Model Type Model Description

SFT-A24-505 2-Pipe Fan Coil Unit Controller, 24Vac Power, Heating or Cooling

(configurable), Modbus Communication

SFT-A24-506 2-Pipe Fan Coil Unit Controller, 24Vac Power, Heating or Cooling

(configurable), 3-Speed Fan Control, Modbus Communication

SFT-A24-P505 2-Pipe Fan Coil Unit Controller, 24Vac Power, Heating or Cooling

(configurable), Modbus Communication, Time Clock

SFT-A24-P506 2-Pipe Fan Coil Unit Controller, 24Vac Power, Heating or Cooling

(configurable), 3-Speed Fan Control, Modbus Communication, , Time Clock

SFT-A110/230-505 2-Pipe Fan Coil Unit Controller, 110Vac/230Vac Power, Heating or Cooling

(configurable), Modbus Communication

SFT-A110/230-506 2-Pipe Fan Coil Unit Controller, 110Vac/230Vac Power, Heating or Cooling

(configurable), 3-Speed Fan Control, Modbus Communication

SFT-A110/230-P505 2-Pipe Fan Coil Unit Controller, 110Vac/230Vac Power, Heating or Cooling

(configurable), Modbus Communication, , Time Clock

SFT-A110/230-P506 2-Pipe Fan Coil Unit Controller, 110Vac/230Vac Power, Heating or Cooling

(configurable), 3-Speed Fan Control, Modbus Communication, Time Clock

SFT-A24-605 4-Pipe Fan Coil Unit Controller, 24V ac Power , Heating and Cooling, Modbus

Communication

SFT-A24-606 4-Pipe Fan Coil Unit Controller, 24Vac Power, Heating and Cooling,

3-Speed Fan Control, Modbus Communication

SFT-A24-P605 4-Pipe Fan Coil Unit Controller, 24V ac Power , Heating and Cooling, Modbus

Communication, Time Clock

SFT-A24-P606 4-Pipe Fan Coil Unit Controller, 24Vac Power, Heating and Cooling,

3-Speed Fan Control, Modbus Communication, , Time Clock

Technical Data Power Supply A24 Models: AC24V ± 10%z or DC24V

A110/230 Models: AC110V-AC240V

SyxthSense Ltd

Copyright © 2012 SyxthSense Ltd. All rights reserved - 02/2012

PS TH6.95 - 2/6

Online store: www.syxthsense.com
Enquiries: T: 0844 840 3100 F: 0844 840 3200

Operating Instructions
(2-Pipe FCU Controller)

MODE Button

Pressing the MODE button the unit
operating mode can be changed.
The available options are: HEAT,
VENT, COOL, OFF.

In HEAT position the controller
operates in heating mode. When
the temperature drops below the
setpoint the valve output is
switched ON.

In COOL position the controller
operates in cooling mode. When
the temperature increases above
the setpoint the valve output is
switched ON.

In VENT position the unit only runs the fan. It is not possible to change the setpoint or set the fan to
operate in automatic mode. The required fan speed(LOW/MED/HIGH) is set by pressing the FAN
button.

In OFF position the FAN and VALVE outputs are switched OFF. The controller provides low limit frost
protection.

Temperature Setting

When the controller is ON, press UP or DOWN buttons to set the desired temperature.

Fan Speed Selection

Press the FAN button until the required fan speed is selected. In AUTO position the fan speed is
modulated automatically.

The available options are LOW, MED, HIGH, AUTO

Setting Controller Time (only available in P-models)

SETTING Controller TIME
When the Controller is ON, press the CLOCK button. The hours will flash. Press UP or DOWN buttons

to set the desired hour.
Press CLOCK button again to set the minutes (time). The minutes will flash. Press UP or DOWN

buttons to set the desired minutes.
Press CLOCK icon gain, and Weekday will flash. Then press UP or DOWN buttons to set the correct

weekday.

Fan Speed Output 3 x 3(1)A 230VAC SPST Relays
Control Valve 1 x 230VAC SPST Relay
Measurement Range 5..95°C
Accuracy 0.5°C/F
Working Temperature 0..70°C
Setpoint Range 5 to 95°C/F
Terminals Max 2.5 mm

2

(min 0.5mm2)

Communication RS485 Modbus RTU, up to 63 devices (logical address range 1..255)

(extended range available on special order)
Modbus Settings 9600 baud, 8 Data Bits, None Parity, 1 Stop Bit
Color White with glass panel
Housing ABS Flame Retardant
Mounting Flush Mounting (wall mounting using a separate box)
Dimensions W86 x H86 x D14.5 mm
Weight 0.15kg

Environmental Conditions Operating Temp 0..+50°C

Humidity Limits 0..95% rH non-condensing
Storage Temp -20..+50°C, Humidity <95% rH
Environmental

Standards

IEC721-3-3, Climatic Conditions Class 3K5

EN 60730

UP button

DOWN button

FAN button

CLOCK button

MODE button

M

SYSTEM

FAN

LOW

MED

HIGH

AUTO

HEAT

COOL VENT