Koer C35-FC Technical Manual

C35-FC Technical Manual

Configurable zone temperature and relative
humidity controller for fan coil/floor convector
systems and Universal HVAC applications

Firmware Version C35-FC 1.0

2

C35-FC

Revision table

Revision number Affected pages Affected sections Date Reviser

3

C35-FC

1. Introduction

1.

1. Use

1.2. Applications

1.3. Hardware features

1.4. Software features

1.5. Type Summary & Ordering Info

2. Before use or installation

3. Device Overview

4. Mounting Diagram

5. Mounting Instructions

6. First Power Up and Commissioning

6.1. Temperature measurement

6.2. Relative humidity measurement

7. Touch screen operation and Maintenance

8. Defi nitions

9. User Interface

9.1. Home Screen Overview

9.2. Navigation buttons

10. Working and operating modes

10.1. Comfort mode

10.2. Economy mode

10.3. Standby mode

10.4. Scheduler

10.5. Occupied mode

11. Main menu and settings

11.1. Home > Menu

11.2. Scheduler

11.3. Setpoints

11.4. Display

11.5. Date and Time settings

11.6. Heating / Cooling (Manual Changeover)

11.7. Sound On / Off

11.8. About

12. Advanced Menu

12.1. Network

12.2. Security

12.3. Parameters

12.4. Offset

12.6. Setpoint Limits

12.7. Language

13. In/Out Menu

13.1. Binary input

13.2. RTD Sensor function

13.3. Temperature sensor

13.4. Input and Output values

14. Applications and connection diagrams

15. Connection terminals

16. Connection diagrams

17. BACnet MS/TP network recommendations

17.1. Wiring and topology

17.2. Termination jumper

17.3. Maximum number of devices on data bus

17.4. Isolated RS485

18. Technical data C35

19. Trouble shooting guide

20. Device Reset

21. Factory reset

22. Calibration of resistive touchscreen

23. BACnet Protocol Implementation Conformance Statement

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C35-FC

1. Introduction

Thank you f

or purchasing a KOER product. KOER is a brand dedicated to the development and
production of the next generation of hardware and software solutions for HVAC management
and building automation systems. Our vision is to continuously develop and produce quality
products for the building automation industry which will have a positive impact on user
environments, quality of life and, health and safety. With this in mind, we value any insights or
feedback you may have regarding our products. (Email: [e-mail])

1.1. Use

This device (C35-FC) can be used for temperature and humidity control of individual zones as
part of a HVAC system, or as a standalone fan coil/fl oor convector controller.

C35-FC can be used in HVAC systems for:

• Heating

• Cooling

• Dehumidifying (only devices with humidity sensor)

C35-FC can control of the following operational elements:

• EC motor fan (0 - 10V DC)

• Electrical valve actuators (0 - 10V DC)

C35-FC can be combined with FC-RB fan coil driver for control of the following operational elements:

• 3-speed motors

• 1-speed motors

• Thermal valve actuators (ON/OFF)

The following elements can be connected to C35-FC:

• Remote temperature or season changeover or fl oor temperature sensor (Pt1000)

• Window contact or presence sensor or dew point sensor

1.2. Applications

The C35-FC was designed for the following applications:

• 2-pipe fan coil or fl oor convector systems

• 4-pipe fan coil or fl oor convector systems

• 2-pipe fan coil with auxiliary heater

• 2-pipe fan coil or radiator with fl oor heating

• Chilled or heated ceiling

• Chilled ceiling and radiator

• Chilled ceiling and fl oor heating

• Two stage chilled or heated ceiling

For more information, see chapter 14. Applications and Connection Diagrams

1.3. Hardware features

Main hardware features include:

• Resistive Colour TFT touchscreen display

• Built-in sensors:

• - Temperature

• - Relative humidity (optional)

• Three analog 0 - 10 V DC outputs

• One analog resistive input for PT 1000 sensor

• One binary input

• RS-485 transceiver (optional)

• Galvanic isolated RS-485 transceiver (optional)

• Real - time clock

• Power supply 24 V AC/DC

5

C35-FC

1.4. Software features

•

Temperature, humidity (optional), fan speed and set points shown on home screen

• PID control based on temperature and relative humidity parameters

• Weekly scheduler, four presets and up to eight scheduler timers per day

• Occupied mode function

• Three operating modes: Comfort; Economy; Standby

• Protection functionality in Standby mode

• Password protected menu and advanced menu

• Window contact or presence sensor input

• Automatic or manual changeover

• Standby, Dim and Night Mode display brightness settings

• Confi gurable commissioning and working parameters

• Set point limitations for users

• Show only set points on home screen

• BACnet MS/TP communication protocol (optional)

• Internal Temperature Compensation Algorithm

• Factory Reset function

1.5. Type Summary & Ordering Info

Product
Summary

Inputs Outputs Built in Sensors Protocol Network Interface Enclosure color

0-10 V

Pt1000 Binary 3x0-10V Temp. Humidity BACnet RS485 Isolated rs-485 White Black

Option
Codes

-H -B /RS /RS-G -BLK

C35-FC √√√√√O OO O √O

√ - Standard O - Option

Ordering Code E.g. C35-FC-H-B/RS-G-BLK

Naming
Convention

1) Device 2) Application 3) Options 4) Network Interface 5) Enclosure color

C35 FC H = Relative Humidity Sensor /RS-G = Galvanic Isolated RS485 -BLK = Black

2. Before use or installation

It is strongly recommended that installation is performed by a qualifi ed professional and
that this user manual is read car

efully prior to installation. Incorrect installation may result
in malfunction, damaging the device or incorrect confi guration. Please ensure you have the
correct user manual for the fi rmware version, as shown on the ‘About’ screen (see chapter 11.8.
About on page 21).

This manual was specifi cally written for Firmware Version C35-FC 1.X.

6

C35-FC

3. Device Overview

Figur

e 3.1.

7

C35-FC

4. Mounting Diagram

Great care should be taken when mounting C35- to any surface. The unit has been designed to
allow it to be connected or disconnected from the wall mount quickly and easily (Figure 5.3 on
Page 9). Please ensure the unit is only connected to the wall mount once all construction has
been completed and the surrounding environment is safe.

Ideal mounting conditions include inside facing walls which are in an open and central location
of the unit’s area of operation.

Warning: In order to ensure accurate readings and correct operation, the unit should not be
mounted in the following areas:

• In direct sunlight

• In enclosed spaces, for example, bookshelves or drawers

• Behind doors or curtains

• On sun - facing walls

• Areas where the unit could be exposed to water or condensation
(e.g. shower rooms or bathrooms)

130 cm

min.
20 cm

Figure 4.1.
Suitable mounting
locations

8

C35-FC

5. Mounting Instructions

Component Listing:

Component Description Quantity

1 Codis 35

1

2 W

all mount bracket 1

3 Screws 4

4 Wall plug / screw anchor 2

Inspect your package to ensure all components are present and that the connection terminals meet the
required specifi cations shown below. See Section 4 (page 7) for appropriate mounting locations.

Warning: Disconnect the power supply prior to commencing installation of the wall mount or
any wiring.

1. Place the wall mount on the conduit box (ø 60.3mm) and insert two screws which are provided.

NOTE: Alternate screws with the parameters shown above (right) can be used.

2. Connect the wires from the conduit box wall mount terminals using the relevant wiring
diagram on page 31.

Connection terminal
wire specifi cations

Single stranded wire 0.2 … 1.5 mm

2

Fine stranded wire 0.2 … 1 mm

2

Captive screw M2

Screwdriver mm

Figure 5.1.

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9

C35-FC

Figure 5.2.

IMPORTANT: Before proceeding to the next step, verify that all connections are in the correct
terminals and that the correct voltage is being provided.

3. Attach C35 - to the wall mount by sliding the unit onto the mounting brackets as
shown in the diagrams below. The unit will click into position. Turn on the power supply
and the unit will automatically turn on.

Figure 5.3.

10

C35-FC

6. First Power Up and Commissioning

Once Once C35 has power

ed on, a boot-up screen will be displayed. The home screen, as shown

on page 12 , will appear once the device has fi nished booting up.

NOTE: The internal sensors require time to stabilise and power up. Only adjust offsets
once the unit has had suffi cient time (outlined below) to complete this process.

6.1. Temperature measurement

The C35 uses an Internal Temperature Compensation (ITC) algorithm to eliminate heat
generated by internal electronic components.

NOTE: The ITC Algorithm requires up to 30 minutes to stabilise and achieve accurate
temperature readings. Thermal resistance of the surface on which the device is
mounted will affect temperature readings.

Once the required time has elapsed, compare sensor readings against a reference instrument. If
required, the device can be calibrated using the Offsets menu instructions on page 26 .

6.2. Relative humidity measurement

The built-in humidity sensor (optional) utilises temperature readings to calculate relative
humidity. Allow 30 minutes for the device to calculate accurate readings of temperature and
relative humidity, prior to adjusting offsets.

NOTE: If offset is added to temperature readings, it will affect relative humidity readings.

7. Touch screen operation and Maintenance

The C35 - is primarily operated through its 3.5” resistive touch screen.

• The screen should not be operated with sharp objects which can scratch or damage the

screen

• To clean the screen, simply wipe the front- facing screen using a slightly damp cloth

CAUTION: Do not expose the device’s vents to liquids and do not use any cleaning agents on
the device as this may result in sensor malfunction or incorrect readings.

Figure 5.4.

$

4. To remove or detach device from the wall mount, press the release bracket on the
bottom of the device and then pull the device upwards.

Warning: Ensure that the power supply has been switched prior to removing the device from
the wall mount.

11

C35-FC

Data Bus RS485 physical layer standard for data transition

ECM Electronically Commutated Motors. C35-FC is equipped with a

0-10 V output for ECM fan control

HVAC Heating, ventilation and air conditioning

Kd Derivative gain for PID controller

Ki Integral gain for PID controller

Kp Proportional gain for PID controller

MS/TP Master-Slave Token Passing

Offset The manual adjustment required to calibrate the temperature

or relative humidity, as measured by the sensor

Pt1000 Platinum resistance temperature sensor with resistance of

1000 Ohm at 0°C

% rh Relative humidity (%)

RTD Resistive Temperature Detector

8. Definitions

Term Description

BACnet A communication protocol f

or Building Automation and

Control Networks

C35 - FC Confi gurable zone temperature and relative humidity

controller for fan coil/fl oor convector systems and universal
HVAC applications

Season changeover Change from heating to cooling or vice versa

Control sequence This parameter defi nes whether the HVAC system is capable of

heating, cooling or heating and cooling; the controlled zone

Cooling / Heating Setpoints The desired temperature range (°C)

12

C35-FC

9. User Interface

9.1. Home Screen Overview

1

2

3

6.1. 6.2. 6.3.

9

10.1 10.2

10.3

8

1. Current operating mode (

Comfort, Economy

or

Standby

)

2. Current working mode (manual, scheduler) or bypass status (

Windows Open, Occupied

Mode timer

)

3. Current fan status

4. Operating and working mode change button

5. Increase or decrease setpoints

6. Select to adjust temperature setpoint and fan speed in

Comfort

mode, or activate/

deactivate

Occupied

mode in

Economy

and

Standby

modes:

6.1. Temperature (°C)

6.2. Fan speed

6.4.

Occupied

mode button

7. Menu button

8. Current relative humidity (% rh) (optional)

9. Current room temperature (°C) as measured by internal sensor or remote sensor

10. Info bar

10.1. Indicates heating mode is active

10.2. Indicates cooling mode is active

10.3. Indicates

Occupied

mode is active

11. Date and time

5 6 5 74

11

10

13

C35-FC

10. Working and operating modes

Working and operating modes are designed to have predefi ned set points, limitations and
options in or

der to reduce energy consumption in different situations. All parameters and
set point limitations for each mode are predefi ned by the technical person responsible for
commissioning of the device.

By changing the working and operating mode, the following will change:

• Temperature setpoint

• Humidity setpoint

• Buttons on home screen

• Display settings

• Following scheduler or not

Working and operating modes are switched sequentially by selecting the button (fi gure 9.1.,
explanation number 4) on the home screen:

There are two main working modes (Manual Control and Scheduler) and three operating modes
(Comfort, Economy and Standby). The device’s working and operating modes are shown on the
home screen (fi gure 9.1., explanation number 1 and 2) to notify users of the device’s current status.

NOTE: If C35-FC is remotely controlled by C35-CBMS, working and operating modes
cannot be changed from the home screen of the device because the button will not
be visible on the home screen.

9.2. Navigation buttons

Below are the standard navigation buttons which appear on most settings screens.

1 2 3 4 1

1. Back and Next: Each screen will offer a “Back” or “Next” button. These can be used to

navigate menus with more than one screen.

2. Home: Pressing the “Home” button will take you directly to the home screen.

3. Previous Screen: Each screen will offer a “Previous” or button. This will take you to the

previous main menu selection.

4. Save: Once a parameter value has been adjusted or modifi ed in the parameter screen, a

“Save” button will appear allowing users to save their changes. If the “Save” button is not
selected prior to changing screens, any changes will not be saved and the original values
will be retained.

Comfort mode

Manual control

Economy mode

Manual control

Comfort / Economy / Standby mode

Following scheduler

Standby mode

Manual control

14

C35-FC

10.1. Comfort mode

This mode prioritises user
comf

ort: it is recommended

that

Comfort mode

is
activated only when the
controlled zone is occupied.

Comfort mode

can be
activated manually or by
the scheduler and, in short
term applications, with the

Occupied button

.

In this mode, users are able
to adjust setpoints on the
homescreen and in the
setpoints menu.

Changes on the homescreen
will be saved automatically in
the setpoints menu.

Figure 10.1.a. Manually controlled

Comfort mode

Figure 10.1.b.

Comfort mode

activated by scheduler

Figure 10.1.c.

Comfort mode

activated through

Occupied mode

function

15

C35-FC

This mode prioritises lower
ener

gy consumption and it is

recommended that

Economy

mode

is only activated
when the controlled zone is
unoccupied.

Depending on the setpoint
range,

Economy mode

can
signifi cantly decrease HVAC
energy consumption and
operating costs.

Economy mode

can be
activated manually using the
button, by the scheduler
or by the presence sensor. (see
chapter

13.1. Binary input

).

Economy mode

can be
overridden for a certain
amount of time by pressing
button (see chapter

10.5.

Occupied Mode

).

NOTE: Users will not be
able to adjust any setpoints
from the home screen in

Economy mode.

The setpoints
for economy mode can be
adjusted in the setpoints menu
(see chapters

11.3. Setpoints

and

12.5. Setpoint limits

).

NOTE: In

Economy mode

the
display will be dimmed after 5
minutes, and turned off after
15 minutes, by default. This
setting can be changed in the

Display

menu (see chapter

11.4. Display

on page 20)

10.2. Economy mode

Figure 10.2.a Manually controlled

Economy mode

Figure 10.2.b

Economy mode

activated by scheduler

Figure 10.1.d.

Comfort mode

activated remotely through

C35-CBMS device

16

C35-FC

10.3. Standby mode

This mode is meant to be
used f

or zones which are
unoccupied for extended
periods of time.

Standby mode

effectively
turns off the HVAC system
unless the system detects
a value below 5-10°c (for
heating mode) or above 45°c
(for cooling mode). If C35-FC
detects that a setpoint is
exceeded, the HVAC system
will be activated to protect
the controlled environment
and to ensure the
temperature remains within
the desired setpoint range.

Figure 10.3.a Manually controlled

Standby mode

Figure 10.2.c

Economy mode

activated by presence sensor

Figure 10.2.d

Economy mode

activated remotely through

C35-CBMS device

17

C35-FC

Figure 10.3.b

Standby mode

activated by scheduler

Figure 10.3.c

Standby mode

activated by window contact (if

enabled in parameters)

Figure 10.3.d

Standby mode

activated remotely through

C35-CBMS device

NOTE: Similarly to

Economy

mode

, users will not be able
to adjust any setpoints from
the Home screen unless

Occupied mode

is activated

(see chapter

10.5. Occupied

mode

).

Standby mode

can be
activated manually using the
button or with the
scheduler.

Standby mode

will be activated if a window
contact switch is connected
and a Window is open (see
chapter

13.1. Binary input

(BIN1)

).

NOTE: In Standby mode, the
display will be turned off
after 5 minutes by default.
This setting can be changed
in

Display

menu (see chapter

11.4. Display

).

18

C35-FC

10.4. Scheduler

The

week long scheduler allows users to set up to four presets (

Workday, Weekend, Holiday

and

Custom

) for the week, where the working modes start and end at specifi c times. The device will
automatically manage the HVAC system to regulate temperature within the specifi c setpoints
for each scheduled working mode (

Comfort, Economy

and

Standby

). See chapter

11.2. Scheduler

.

10.5. Occupied mode

Occupied mode

can override

Economy

or

Standby

mode to bring the controlled environment

to a comfortable setting with the single touch of the

Occupied

button on the home screen.

In these modes, the

Occupied

button will appear at the bottom of the home screen (see

chapter

9.1. Home screen overview)

. When

Occupied mode

is activated, the system will operate

in

Comfort mode

and a countdown timer will appear on the Home screen. The default

Occupied

timer is set to 60 minutes. The duration can be adjusted in the

Parameters

menu (see chapter

12.3. Parameters

). Users will be able to adjust the comfort setoints ±3°c from the standard

value for the duration of the override. By pressing the

Occupied

button again,

Occupied mode

will be deactivate and it will return to the previous operating mode.

11. Main menu and settings

Select the button on the
Home screen to enter the
Settings menu, shown right.

11.1. Home > Menu

11.2. Scheduler

Select the on the Menu
screen. The

Scheduler

screen

will show the unit’s week

- long schedule. Pressing
the button below each
corresponding day will cycle
through the desired daily
profi les (

Workday, Weekend,

Holiday

and

Custom

). Press
the button to save the
changes.

19

C35-FC

Step by step instructions:

1.

Click the button to create new timer.

2. Touch the timetable legend or timer array to select the desired working mode (

Comfort,

Economy, Standby

).

3. Using the +/- buttons, adjust the start time of the operating mode.

4. Repeat this process for each entry until the whole day has been confi gured.

5. To edit specifi c enties, select the entry on the timetable on the 24 hour timetable or by

pressing the button.

6. Press the button to delete entries in the timetable.

7. Once all the required entries have been made, press “Save” to save the changes to the daily profi le.

The The setpoints for
heating, cooling and relative
humidity can be adjusted in
the

Setpoint

menu for each

operating mode (

Comfort,

Economy,

and

Standby

).

These setpoints will be used
by the scheduler or when a
mode is manually activated.
To adjust the setpoints for
each operating mode, enter
the relevant screen and
increase or decrease the
desired setpoints using the
+/- buttons. (The setpoints
for comfort mode can also be
adjusted using the increase/
decrease buttons on the
home screen). Once the
required adjustments have
been made, select to save
your changes.

11.3. Setpoints

Confi guring Daily Scedules

Once the week long schedule
has been set, the daily
profi les can be inputted by
pressing one of four preset
profi les:

Workday, Weekend,

Custom

or

Holiday.

A 0-24 hour timetable will
appear.

20

C35-FC

Select the button on

Menu

screen to enter the

Date/Time

menu. Select EDIT
from the options to change
the time, date or format. Once
the correct time and date
has been set using the time
buttons -/+, press the
button to save the changes.

11.5. Date and Time settings

Select the button on

Menu

screen to enter the

Display

menu.

Brightness: Select EDIT from
the options to change the
display brightness (%).

Turn Off Display: Select EDIT
from the options to enable
the screen to turn off after 5,
15 or 30 minutes, or never.

Dim Display: Select EDIT from
the options to enable the
screen to dim brightness after
5, 15 or 30 minutes, or never.

Night Mode:

Night mode

aims to reduce eye strain
in dark settings. If enabled,
screen brightness will
decreased to a minimal level
between the start and stop
time. Enable or disable

Night

Mode

, using the On/Off
button. The timer can be set
by using the +/- buttons.
Press the button to save
any changes.

11.4. Display

21

C35-FC

NOTE: For all other contr

ol sequence options, this button will be disabled and it will only serve

as indicator for heating or cooling mode.

Once the desired setting has been selected, press the button to save the changes.

Manual changeover from
heating to cooling and
vice versa can be done by
pressing the

Heating

or

Cooling

buttons on

the

Menu

screen. Manual
changeover is only possible
when

Cooling

or

Heating

is selected as the control
sequence in

Parameters

(see

chapter

12.3. Parameters

) and

when

Sensor

function in the

In/Out

menu is not defi ned

as

Changeover

(see chapter

13.2. RTD sensor function

).

Select the

Sound on

or

Sound off

button on

Menu

screen to turn the unit’s key tone

speaker on or off. Press the button to save any changes.

Enter the

About

menu to
see Firmware version and
System info.

11.6. Heating / Cooling (Manual Changeover)

11.7. Sound On / Off

11.8. About

22

C35-FC

MS/TP MAC:

The unique MAC address, which can have a value between 0-127 on the local

MS/TP data bus.

Max Master: The highest MAC address used by BACnet devices in the local MS/TP data bus
(limited to 127). For optimal network performance, limit the Max Master value to the total
number of devices on the data bus.

Max Info Frames: The maximum number of requests a device is able to send over the local
network. For optimal network performance, this value should be set to 1.

Baud Rate: The Baud Rate setting determines the rate at which data is sent on the data bus.
The maximum value will be determined or limited by the quality of cabling between the two
furthest devices on the network.

NOTE: All devices must be set on the same Baud Rate. The available options are:

• 9600

• 19200

• 38400

• 57600

• 76800 (default value)

Once the desired settings have been selected, press the button to save any changes.

12.1. Network

Enter the

Advanced Settings

menu. Select the

Parameter

button to enter the specifi c
parameters of the system
into the device.

NOTE: You will be prompted
for a pass code prior to
entering the

Advanced

menu.
Enter the passcode to proceed
to the menu. Note: The default
password is 0000.

12. Advanced Menu

NOTE: BACnet and network
settings should be confi gured
by qualifi ed profesionals.

Device Name: The device
name that will be used on
the BACnet network.

Device ID: A unique BACnet
device number which can
have a value between 0 to
HEX 3FFFFF. This will be used
for the device’s identifi cation
on the different protocols
within the BACnet network.

12.1.1. Network [1/2] Network BACnet settings

23

C35-FC

To set a lock password and
limit access to the unit’s
home scr

een, or to show only
setpoints, select the button
on the home screen to enter
the

Settings

menu. Select

Advanced

and then

Security.

NOTE: The default
administrator password
0000 can be used to bypass
the user password and to
enter

Advanced

menu. The
administrator password
cannot be changed.

User Password: Select the

User Password

button from

the

Options

screen, and
then input a password using
the keypad. Once a 4-digit
password has been set, press
the OK button.

12.2. Security

12.1.2. Network [2/2] Network BACnet settings

CBMS Device ID: Set up the

CBMS Device ID only if you
registered a C35 FC or C35
VAV within C35 CBMS device
and the Remote Controlled
feature is enabled for a
targeted device.
The CBMS Device ID is a
BACnet device number
which uniquely defi nes
C35 CBMS device within a
Network. Enter the CBMS
Device ID only if you want to
enable automatic switch off
of the Remote Control mode. If the CBMS Device ID is entered the C35 FC or the C35 VAV will
periodically check whether the C35 CBMS device is present and in case that a connection with
the C35 CBMS is lost, the Remote Control mode will be temporally disabled. Once the connection
is reestablished the Remote Controlled mode will be restored automatically. A default value is 0.

Turn Off Remote Control

A button which will turn off the Remote Control mode on the C35 FC or the C35 VAV device,
but if the C35 CBMS device is pUresent and the C35 FC or the C35 VAV is still registered within
the C35 CBMS and the Remote Controlled feature is enabled, the C35 CBMS will turn back on
the Remote Control mode on the targeted device, regardless that you switch it off using this
button. Purpose of this button is to provide the ability to manually turn off the Remote Control
mode if the C35 CBMS device is no longer present.

Once the desired settings have been selected, press the button to save any changes.

24

C35-FC

12.3. Parameters

12.3.1. Parameters [1 / 4]
Main Confi guration

Application Type

The Application Type defi nes confi guration of the controlled system. By selecting one of the options,
the functionality of the analog outputs is changed. The following applications are available:

• Application type: 2-pipe system

• Application type: 4-pipe system

• Application type: 2-pipe and aux. heater

• Application type: Chilled/heated ceiling

• Application type: Chill Ceiling/heat fl oor

• Application type: 2-stage chill/heat ceiling

To see more details about application diagrams, go to chapter

14. Applications and connection

diagrams.

Lock Home Screen: To
activate a user password on
the

Home screen

, press the

Lock Home Screen

button so

that its status is

On

.

Unlock Setpoint Buttons:

This function allows users to
change the setpoint when
the Home screen is locked. It
can only be activated if the

Lock Home Screen

function is

On

. Users will not be able to
change operating and working
mode or enter the

Menu.

NOTE: It is recommended to use setpoint limits (see chapter 12.5.

Setpoint Limits

) to ensure

rational energy consumption when Setpoint buttons are unlocked.

Show only Setpoint values: Turn this function On if you only want to show Setpoints on the

Home screen

. Measured values will not be visible for the end users. Measured values can be

seen in

Offset menu

(see chapter 12.4. Offset).

Return To Home screen: When this function is enabled, the device will return to the

Home

screen automatically from any menu screen after 1 minute of inactivity.

25

C35-FC

Control sequence:

The

Control sequence

setting defi nes whether the controlled system is capable of heating,

cooling or both.

•

Cooling only

•

Heating only

•

Cooling or heating

•

Cooling and heating

Changeover mode

The

Changeover mode

settings defi nes whether the changeover from cooling to heating and
vice versa is controlled automatically according to signal from changeover sensor, manually
from the

Menu

(see chapter

11.6. Heating/Cooling (manual changeover)

) or if changeover

signal is distributed through network by

C35-CBMS Compact building Management System

device. The following applications are available:

• Manual

• Automatic

• Following CBMS

Fan motor type

The Fan motor type defi nes whether the controlled fan coil is equipped with EC motor fan, or a
3 or 1 speed motor fan. This setting will affect analog output AO1 voltages.

Fan motor type: EC motor

By selecting

EC motor

, user will be able to select fi ve fan speeds (20%, 40%, 60%, 80% or

100%), plus

AUTO

fan working mode and

OFF

mode.

See

ECM voltage

settings in 12.3.2.

Parameters [2/4]

for analog output voltage settings.

Fan motor type: 1 or 3 speed motor

By selecting

1 speed motor

or

3 speed motor

user will be able to select one or three fan speeds,

AUTO

fan working mode and

OFF

mode.

NOTE: Select this fan motor type only when using

C35-FC

with

FC-RB

fan coil driver.

Occupied timer

The default duration for the occupancy timer is 60 minutes. To adjust the occupancy timer
duration, enter screen 01/05 of the

Parameters

menu and increase or decrease the number of

minutes using the + / - buttons.

Select to save your changes.

26

C35-FC

Adjustments can be made using the + / - buttons. Once the required adjustments have been
made,

select to save your changes.

PID

The Proportional-Integral-Derivative controller (PID controller) calculates a difference between
measured values and set points. The PID controller minimises the difference between those
values by adjusting openness of the valves and fan speed.

NOTE: The default values may not be suitable for all applications. Adjust PID gains
according to each project’s specifi cations.

Fan PID

Tuning a PID controller for fan reaction involves setting Proportional gain (

Fan PID Kp

), Integral

gain (

Fan PID Ki

) or Derivative gain (

Fan PID Kd

) parameter values. If 2-term (PI) or 1-term (P)

control is needed adjust unnecessary values to zero.

ECM voltage

The analog output signal (AO1) for the EC motor can be confi gured with three parameters:

•

ECM OFF Voltage:

If this value is different from zero volts for the controlled EC motor

fan, adjust the

ECM OFF

voltage to a value that will turn off the ECM fan.

•

ECM Min Speed Voltage:

Defi nes the minimum signal value and the minimum speed

of the fan (20 %).

•

ECM Max Speed Voltage:

Defi nes the maximum signal value and the maximum speed

of the fan (100 %).

Example for

ECM voltage

settings:
ECM OFF voltage = 0.8 V
ECM Min speed voltage = 2 V
ECM Max speed voltage = 8 V

Fan speed AO1 [V]

OFF 0.8 V

20% 3.2 V

40% 4.4 V

60% 5.6 V

80% 6.8 V

100% 8.0 V

Table 12.3.3. Analog output (AO1) values depending on selected fan speed and ECM voltage settings

12.3.2. Parameters [2/4]

27

C35-FC

12.3.4. Parameters [4/4]
Humidity protection

12.3.3. Parameters [3/4]

Valve PID

Tuning a PID controller for
the valve’s reaction involves
setting parameter values of
Proportional gain (Kp), Integral
gain (

Ki

) or Derivative gain
(Kd). If 2-term (PI) or 1-term
(P) control is needed, adjust
unnecessary values to zero.

Valves Stage 1 PID

settings will
affect heating and cooling valve
reactions.

Valves Stage 2 PID

will affect valves in applications
with the second stage.

Select to save your changes.

By enabling the

Humidity

Protection

function, any time
a relative humidity value
measured by the internal
sensor of the device exceeds
the

Max Relative Humidity

value, the C35-FC-H will
activate its fan and open the
cooling valve, until humidity
value is below

Max Relative

Humidity

value again.

Humidity Protection

is active

in

Economy, Standby

mode,
whenever the device is in
cooling mode and if the
application type is a 4-pipe
system where there is no
demand for heating.

Select to save your changes.

The C35-FC can be calibrated
by adjusting the offset values
on the device. Adjust offset
values for each sensor using
the + / - buttons.

Select to save your
changes. Once the button
has been pressed, the values
will be updated to refl ect the
input of the offset value.

12.4. Offset

28

C35-FC

Setpoint limits are defi ned
in the

SP limits

menu.
Limits can be set for the
temperature in heating and
cooling control modes, and
for all operating modes
(

Comfort, Economy and

Standby

). Once setpoint limits
have been defi ned, users
will not be able to adjust
setpoints outside the defi ned
limits.

Adjust the limits for each
setpoint on screens 1 to 4
using the + /- buttons. Select
to save your changes.

Select the

Language

button

on the

Advanced

menu
screen. Select the desired
language from the available
options and then press the
button to save the changes.

12.5. Setpoint Limits

12.6. Language

If a window contact switch or
presence sensor is connected
to binary input (BIN1), change

Binary Input

parameter from

Disabled

to

Window Contact

or

Presence Sensor

.

13. In / Out Menu

13.1. Binary Input

29

C35-FC

13.2. RTD Sensor function

If the

Analog RTD sensor

(PT1000) sensor is connected
to the device’s RTD input, the
parameter has the following
available options:

• Disabled

– a default

value: an external sensor is
connected but has not
been enabled

• Changeover sensor

• Remote sensor

• Floor sensor

NOTE: If a RTD sensor is not
connected or a sensor with
resistance smaller than 803
Ω or bigger than 1480 Ω is
connected, a message

Not

connected

will be shown
instead. Connect only to a
PT1000 RTD sensor.

13.1.1. Binary Input: Window
Contact

If the

Window Contact

parameter is selected and a window’s contact switch is triggered by an

open window, then the system will go into

Standby

mode to save energy. The operating status

on the home screen will state

Standby - Window

is

Open

to notify users. Once the window has

been closed, the system will resume normal operation.

13.1.2. Binary Input:

Presence Sensor

If the

Presence Sensor

parameter is selected and the sensor is not detecting any presence, the

system will go from

Comfort

mode to

Economy

mode. The operating status on the

Home

screen

will state

Economy mode – No presence detected

. Once the presence is detected, the system

will resume to

Comfort

mode.

The contact polarity can be reversed by selecting the binary input polarity

Normally open

or

Normally closed

.

Select to save your changes.

13.2.1. RTD sensor Function:

Changeover

If the

RTD sensor function

parameter is set to

Changeover

, the device will automatically
change from heating to cooling or vice versa as required. Changeover will be determined by
the temperature in the duct or pipe. If the temperature in the duct or pipe is above 28°C, the
control mode will change to heating. If the temperature is below 18°C, the control mode will be
changed to cooling.

13.2.2. RTD sensor Function:
Remote sensor

The remote sensor for room temperature measurement can be activated by selecting

Remote

sensor

from the available

RTD Sensor Function

parameter options.

13.2.3. RTD Sensor Function:
Floor Sensor

The

Floor Heating Sensor

function requires fl oor temperature sensor (PT1000) to be connected

and enabled in the settings. Enable the fl oor sensor by selecting

Floor Sensor

from the

available

Sensor function

parameter options. Select to save your changes.

13.2.4. Max Floor
Temperature

This parameter limits the maximum fl oor temperature in

Heating

mode. If the fl oor sensor

parameter is enabled, a

Max Floor Temperature

parameter will appear at the bottom of screen:

In/Out

[1/2]. Adjust maximum fl oor temperature by using the + / - buttons.

When the temperature measured by the fl oor sensor is bigger than the

Max fl oor temperature

value, the C35-FC will close the heating valve. Select to save your changes.

30

C35-FC

13.3. Temperature Sensor

Users can defi ne how temperature readings will be measured by pressing the button next to

Temperature Sensor

. The options are:

•

Internal

: the temperature as measured by the device’s inbuilt sensor.

•

Remote

: if a remote RTD PT1000 sensor is connected, the temperature is measured by

the remote sensor.

•

Min, Max and Average

: if a remote sensor is connected, the measured temperature can

be a calculated using a minimum, maximum or average reading of the two sensors.

Select to save your changes.

13.4. Input and Output values

Screen [2/2] of the In/Out
menu summarises all of
the values and states of the
device’s inputs and outputs.
These values are refreshed
every second.

14.1. 2-pipe fan coil with ECM fan and electrical actuator

14. Applications and connection diagrams

HOME > MENU > ADVANCED > PARAMETERS [1/4]
Application type: 2-pipe system
Control sequence: Cooling only

Heating only
Cooling or heating

Fan motor type: EC motor

1 speed motor*
3 speed motor*

*use only with FC-RB fan coil driver

HOME > MENU > ADVANCED > IN/OUT [1/2]
Binary input: Window contact

Presence sensor

RTD Sensor Function: Changeover sensor

Remote sensor

Temperature sensor: Internal

Remote

D1 – C35-FC
M1 – ECM fan (DC 0-10 V)
V1 – Heating or cooling valve actuator (DC 0-10 V)
S1 – Switch for window or presence sensor contact
T1 – Changeover or remote temperature sensor (PT1000)

The C35-FC supports the following applications, which can be confi gured in

Advanced

menu.

AO1

AO2

24V

GND

G
D­D+

GND

GND
RTD
RTD

BIN1

GND

24V

AC/DC

/+
/-

M1

V1

S1

D1

T

T1

6A

Figure 14.1.1. Functional

diagram

Figure 14.1.2. Connection

diagram

31

C35-FC

14.2. 4-pipe fan coil with ECM, electrical actuators and BACnet communication

HOME > MENU > ADVANCED > PARAMETERS [1/4]
Application type: 4-pipe system
Control sequence:

Cooling and heating

Fan motor type: EC motor

1 speed motor*
w3 speed motor*

*use only with FC-RB fan coil driver

HOME > MENU > ADVANCED > IN/OUT [1/2]
Binary input: Window contact

Presence sensor

RTD Sensor function: Remote sensor
Temperature sensor: Internal

Remote

HOME > MENU > ADVANCED > NETWORK
Device name: Network name
Device ID: 0-4194303
MS/TP MAC: 0-127
Max Master: 0-127
Max info frames: 0-100
Baud rate: 9600, 19200, 38400,

57600, 76800

D1 – C35-FC
M1 – ECM fan (DC 0-10 V)
V1 – Cooling valve actuator (DC 0-10 V)
V2 – Heating valve actuator (DC 0-10 V)
S1 – Switch for window or presence sensor contact
T1 – Changeover or remote temperature sensor (PT1000)

AO1

AO2

AO3

24V

GND

G
D­D+

GND

GND

GND

RTD
RTD

BIN1

GND

24V

AC/DC

/+
/-

G
D­D+

BACnet

S1

D1

T

T1

G
D­D+

M1

V1

V2

6A

14.3. 2-pipe and auxiliary heater

HOME > MENU > ADVANCED > PARAMETERS [1/4]
Application type: 2-pipe & aux. heater
Control sequence:

Heating only

Cooling or heating

Fan motor type: EC motor

1 speed motor*
3 speed motor*

*use only with KOER FC-RB fan coil driver

HOME > MENU > ADVANCED > IN/OUT [1/2]
Binary input: Window contact

Presence sensor

RTD Sensor function: Changeover sensor

Remote sensor

Temperature sensor: Internal

Remote

D1 – C35-FC
M1 – ECM fan (DC 0-10 V)
V1 – Cooling or heating valve actuator (DC 0-10 V)
E1 – Current valve for electric heater (DC 0-10 V)
V2 – Heating valve actuator for radiator (DC 0-10 V)
S1 – Switch for window or presence sensor contact
T1 – Changeover or remote temperature sensor (PT1000)

Figure 14.2.1. Functional

diagram

Figure 14.2.2. Connection

diagram

Figure 14.3.1. 2-pipe fan coil

with auxilary electric heater

or radiator heater

Figure 14.3.2. 2-pipe fan coil

with auxilary radiator heater

32

C35-FC

AO1

AO2

AO3

24V

GND

G
D­D+

GND

GND

GND

RTD
RTD

BIN1

GND

24V

AC/DC

/+
/-

S1

D1

T

T1

M1

V1

E1

+

6A

V2

AO O3

Analog outputs

[V, DC]

10

t [s

]

Figure 14.3.3. Connection diagram

Figure 14.3.4. Analog outputs

for two stage heating

14.4. 2-pipe fan coil/radiator and floor heating

HOME > MENU > ADVANCED > PARAMETERS [1/4]
Application type: 2-pipe & fl oor heating
Control sequence:

Heating only

Cooling or heating

Fan motor type: EC motor

1 speed motor*
3 speed motor*

*use only with KOER FC-RB fan coil driver

HOME > MENU > ADVANCED > IN / OUT [1/2]
Binary input: Window contact

Presence sensor

RTD Sensor function: Floor sensor
Temperature sensor: Internal
Max fl oor temp: 5-40 °C

D1 – C35-FC
M1 – ECM fan (DC 0-10 V)
V1 – Cooling or heating valve actuator (DC 0-10 V)
E1 – Current valve for electric heater (DC 0-10 V)
V2 – Floor Heating valve actuator for radiator (DC 0-10 V)
S1 – Switch for window or presence sensor contact
T1 – Floor sensor (PT1000)

T1

V2

V1

M1

Figure 14.4.1. Functional

diagram with 2-pipe fan coil

and fl oor heating

T1

V2

V1

Figure 14.4.2. Functional

diagram with radiator and

fl oor heating

AO1

AO2

AO3

24V

GND

GND

GND

GND

RTD
RTD

BIN1

GND

24V

AC/DC

/+
/-

S1

D1

T

T1

M1

V1

V2

6A

Figure 14.4.3. Connection

diagram

14.5. Chilled or heated ceiling

HOME > MENU > ADVANCED > PARAMETERS [1/4]
Application type: Chilled or heated ceiling
Control sequence:

Cooling only
Heating only
Cooling or heating

HOME > MENU > ADVANCED > IN/OUT [1/2]
Binary input: Dew point sensor
RTD Sensor function: Changeover sensor

Remote sensor

Temperature sensor: Internal

Remote

H1V1T1

T1

Figure 14.5.1. Functional

diagram

33

C35-FC

D1 –

C35-FC

V1 – Cooling or heating valve actuator (DC 0-10 V)
H1 – Dew point sensor
T1 – Changeover or remote temperature sensor (PT1000)

AO1

AO2

24V

GND

G
D­D+

GND

GND
RTD
RTD

BIN1

GND

24V

AC/DC

/+
/-

V1

D1

T

T1

6A

H1

Figure 14.5.2. Connection

diagram

14.6. 2-pipe fan coil and chilled ceiling

HOME > MENU > ADVANCED > PARAMETERS [1/4]
Application type: 2-pipe & chilled ceiling
Control sequence:

Cooling or heating

HOME > MENU > ADVANCED > IN/OUT [1/2]
Binary input: Dew point sensor
RTD Sensor function: Remote sensor
Temperature sensor: Internal

Remote

D1 – C35-FC
V1 – Cooling valve actuator (DC 0-10 V)
V2 – Heating valve actuator (DC 0-10 V)
H1 – Dew point sensor
T1 – Remote temperature sensor (PT1000)

Figure 14.6.1. Functional

diagram

F igure 14.6.2. Connection

diagram

14.7. Chilled ceiling and floor heating

HOME > MENU > ADVANCED > PARAMETERS [1/4]
Application type: Chilled ceiling or fl oor heating
Control sequence:

Cooling and heating
Cooling or heating

HOME > MENU > ADVANCED > IN/OUT [1/2]
Binary input: Dew point sensor
RTD Sensor function: Floor sensor
Temperature sensor: Internal
Max fl oor temp: 5-40 °C

D1 – C35-FC
V1 – Cooling valve actuator (DC 0-10 V)
V2 – Heating valve actuator (DC 0-10V)
H1 – Dew point sensor
T1 – Floor temperature sensor (PT1000)

T1

V2

H1V1

AO1

AO2

AO3

24V

GND

G
D­D+

GND

GND

GND

RTD
RTD

BIN1

GND

24V

AC/DC

/+
/-

D1

T

T1

V1

V2

6A

H1

Figure 14.7.1. Functional

diagram

F igure 14.7.2. Connection

diagram

V1

M1

H1V2

T1

AO1

AO2

AO3

24V

GND

GND

GND

GND

RTD
RTD

BIN1

GND

24V

AC/DC

/+
/-

S1

D1

T

T1

M1

V1

V2

6A

34

C35-FC

14.8. Two stage chilled or heated ceiling

HOME > MENU > ADVANCED > PARAMETERS [1/4]
Application type: 2-stage chilled/heated ceiling
Control sequence:

Cooling only

Heating only
Cooling or heating

HOME > MENU > ADVANCED > IN / OUT [1/2]
Binary input: Dew point sensor
RTD Sensor function: Changeover sensor

Remote sensor

Temperature sensor: Internal

Remote

D1 – C35-FC
V1 – Cooling or heating valve stage one (DC 0-10 V)
V2 – Cooling or heating valve stage two (DC 0-10V)
H1 – Dew point sensor
T1 – Changeover or remote sensor (PT1000)

Figure 14.8.1.

Figure 14.8.2.

Figure 14.8.3.

14.9. Applications with 3 or 1 speed motor and thermal valve actuators using FC-RB

AO1
AO2
AO3

24V

GND

G
D­D+

RTD
RTD

BIN1

GND

230V AC

50 Hz

L
N

V1
V2

AI1
AI2
AI3

24V AC
GND

10 A

DO1
DO2

DO3

DO5

D2

L

DO4

M1

D1

S1

T

T1

Figure 14.9.1. Connection diagram of C35-FC… (D1) and FC-RB (D2)

For applications with 3/1 speed motor and/or with thermal valve actuators which are
controlled by mechanical and solid state relays, use the FC-RB fan coil relay board.

Voltage output (AO1) from the C35-FC device is applied to analog input 1 (AI1) of the FC-RB, and
it controls the 3 or 1 speed fan through digital outputs (DO1, DO2, DO3).

H1V1T1

V2

T1

AO1

AO2

AO3

24V

GND

G
D­D+

GND

GND

GND

RTD
RTD

BIN1

GND

24V

AC/DC

/+
/-

D1

T

T1

V1

V2

6A

H1

AO2A O3

Analog outputs

[V, DC]

10

t [s]

35

C35-FC

15. Connection terminals

Figur

e 15.1.

Fan speed OFF 1 2 3

AI1 voltage 0 V 2 V 5.5 V 10 V

DO1 OFF ON OFF OFF

DO2 OFF OFF ON OFF

DO3 OFF OFF OFF ON

Table 14.9.1. Relationship between the input voltage and fan speeds (digital outputs).

Voltage output AO2 from the C35-FC is applied to the FC-RB analog input 2 (AI2). Analog input
2 (AI2) contr

ols the digital output 4 (DO4) with Pulse Width Modulation (PWM). If this voltage
is 7.5V, or 75% of the maximum 10V value, then the DO4 will set the electric valve actuator to
75% open. In the same manner, voltage output 3 (AO3) from C35-FC controls the digital output
5 (DO5) through analog input 3 (AI3) on FC-RB.

C35-FC

G0 Power supply voltage ground
G
D­D+
SC
AI
M

(Pin 1)
(Pin 2)
(Pin 3)
(Pin 4)
(Pin 5)
(Pin 6)
(Pin 7)

RTD (Pin 8,9)

Power supply voltage 24 V AC
RS485 data –
RS485 data +
RS485 isolated ground or cable shield connection
Analog input 1 DC 0-10V (1mA)
Analog input 1 ground reference
Analog input for RTD room temperature sensor, changeover sensor or floor sensor (Pt1000)

BIN (Pin 16, 17) Input for potential-free switch (window, presence sensor or dew point sensor)
AO1
M1
AO2

(Pin 15)
(Pin 14)
(Pin 13)

Analog output 1, DC 0-10V (1mA) for fan
Ground reference for analog output 1
Analog output 2, DC 0-10V (1mA) for valve actuators

M2 (Pin 12)
AO3 (Pin 11)
M3 (Pin 10)

Ground reference for analog output 2
Analog output 3, DC 0-10V (1mA) for valve actuators
Ground reference for analog output 3

36

C35-FC

16.2. Termination jumper

P

osition of the termination jumper is shown in the fi gure below. The termination jumper
should be connected on the fi rst and last device of the data bus segment. When the jumper is
connected, termination is enabled. A 120 resistor is connected between RS-485 nodes. When
the jumper is removed, the termination of the cable is disabled.

16. BACnet MS/TP network recommendations

16.1. Wiring and topology

BACnet wiring requirements

• Use

Shielded Twisted Pair

cable (0.2 mm2).

• Maximum cable length for a data bus segment must not exceed 1200 m.

• Only a daisy-chained data bus topology (as shown in drawing) is acceptable.

• Connect cable shields together. Connect cable shield to the Protective Earth (PE) at one

point only.

• Connect termination jumper on the fi rst and last device on the data bus (see below).

• Maintain same polarity between devices on a single power supply.

37

C35-FC

16.3. Maximum number of devices on data bus

The C35-FC--B/RS is categorized as BA

Cnet MS/TP Master Device. The maximum
number of Master Devices supported by BACnet MS/TP on one data bus segment is 128.
However, it is recommended that no more than 50 devices are connected to one data
bus segment. A BACnet router device should be used for projects where more data bus
segments need to be connected, as shown below.

16.4. Isolated RS485

Devices with RS-485 and with galvanic isolation are marked with suffix /RS-G. Galvanic
isolation is required where there is no guarantee that the potentials at the earth grounds
of different nodes in the system are within the common-mode range of the receiver.
The benefits of galvanic isolation extend beyond safety and protection from dangerous
voltages. They also provide error-free communication in the presence of high edge-rate
transients, plus noise and high common mode voltage that would otherwise render a
non-isolated network inoperative.

17. Technical data C35

Power supply Nominal voltage AC 24 V ± 15 %

DC 17…39 V

Consumption 1.5 W

Analog Inputs Resistive input (PT1000) 803 … 1480  (-50 … 125 °C)

Resolution 0.385  (0.1 °C)

Accuracy ± 1.54  (± 0.5 °C)

Binary Input Voltage free contact Selectable (NO/NC)

Analog Outputs Voltage outputs 0 - 10 V DC (1 mA)

Resolution 10 mV

Accuracy ± 0.9 % (full scale)

38

C35-FC

Display Type Graphical TFT LCD

Touchscreen type Resistive / single touch

Size 3.5 inch (diagonal)

Resolution 320 x 240 pixel

Color depth 16 bit

Real time clock Battery ON time up to 200 hours

Temperature sensor Type Silicon band gap

Resolution 0.0625 °C

Accuracy ± 0.5 °C (max) - 20 °C to

+ 100 °C

Humidity sensor Type Capacitive

Range 0-100 % rH from -40 °C

to 75 °C

Accuracy ± 2% at 25°C

RS485 Bitrate 250 kbps (up to 2000 m)

Isolation Galvanic (optional)

Termination 120  (jumper selectable)

Connection terminals Single stranded wire 0.2 - 1.5 mm

2

Fine stranded wire 0.2 - 1 mm

2

Captive screw M2

Screwdriver Flat-bladed 0.5 x 2.5 mm

Degree of protection Enclosure IP20

Against electric shock Class III

Ambient temperatures Operation + 5 °C to + 40 °C

Transport and storage - 20 °C to + 65 °C

Weight With package/without

package

180 g / 150 g (max)

39

C35-FC

Dimensions (mm)

Directives

conformity

EMC directive 2004/180/EC

Low voltage directive
2006/95/EC

RoHS 2011/65/EU (RoHS 2)

Standards Electronic individual zone

control equipment

EN 15500:2008

Automatic electrical controls
for household and similar use

EN60730-1

Electromagnetic
Compatibility (EMC)

Emission standard for
residential, commercial and
light industrial environments

EN 61000-6-3:2007

Immunity for industrial
environments

EN61000-6-2:2005

Disposal This device is classifi ed as waste electronic equipment

under European Directive 2002/96/EC (WEEE) and may
not be disposed of as unsorted municipal waste.
Adhere to all relevant national laws.

40

C35-FC

18. Trouble shooting guide

Symptom Diagnostic Test Cause Solution

Home screen temperature
r

eading is incorrect.

Confi rm room temperature
using a thermometer.

The device has not had
enough time to power up
and stabilise.

After resetting the device,
wait 30 minutes prior to
adjusting parameters.

The device has not been
calibrated.

Calculate and input the
temperature offsets. See
chapter

12.4. Offset.

Unit has not been mounted
correctly, resulting
in uncharacteristic
temperatures.

Remount device in a suitable
mounting location and follow
mounting instructions. See
chapter

4. Mounting diagram.

Incompatible remote sensor
has been connected.

Only use the PT1000 resistive
temperature sensor.

The device is not mounted
properly.

Ensure the device has clicked
into place on the wall mount.
See chapter

5. Mounting

instructions.

Relative humidity reading
is incorrect.

Compare measurements
against a reference
instrument.

The device has not had
enough time to power up
and stabilise.

Read chapter

First start up

and Commissioning.

The device has not been
calibrated.

Calculate and input the offsets.
See chapter

12.4. Offsets.

Display is not ON or the
device appears to be OFF.

Touch the screen: the device
should awaken upon contact.
If not:

The connecting pins have
been damaged during
installation.

Ensure none of the connector
pins are bent. If required,
gently realign any bent pins.

The device is not mounted
correctly.

Ensure the device has clicked
into place on the wall mount.
See chapter

5. Mounting

instructions.

The device’s wiring has not
been installed correctly.

Install the device in line with
the wiring diagrams. See
chapter

14. Applications and

connection diagrams.

Display’s touch screen is not
responding to touch or it is
responding incorrectly.

Touch the screen to see if
there is a response.

A pressure has already been
applied on touchscreen
surface.

Check the perimeter of the
display and remove any dust
or dirt.

Check if plastic enclosure
is applying pressure on
touchscreen due to incorrect
mounting. Check if wall mount
is mounted on uneven surface.

If the pressure has been
applied at one place but
the graphic response
is on other part of the
screen, recalibration of the
touchscreen is required.

For recalibration of touch
screen, please see chapter

21. Calibration of Resistive
Touchscreen.

41

C35-FC

Symptom Diagnostic Test Cause Solution

Display brightness is low. Touch the screen to see if the

brightness will

increase.

If brightness increases after
the display has been touched,
the Dim display setting is
turned on.

Change “Dim” display settings
in Display menu. See chapter

11.4. Display.

If brightness don’t increases
after the display has been
touched, the Night mode
setting is turned on.

Change the “Night mode” start
and stop time, or turn off this
option in the display menu.
See chapter

11.4. Display.

Scheduler is not working
properly.

Set new timers and test the
scheduler. The home screen
should respond in line with
the set timetable.

Time and/or Date have not
been set correctly.

Enter the correct date and
time in the

Date/Time menu

.

See chapter

11.5. Date and

time settings.

When device is following
scheduler it is always in
standby mode.

The scheduler timer presets
have not been confi gured.

Enter new timers in
scheduler presets in the
Scheduler menu. See chapter

11.2. Scheduler

System is not heating or
cooling to the desired
setpoint.

Check the

Home Screen

status bar to ensure the
correct control sequence icon:
(heating) or (cooling),
is present.

The unit is set to manual
changeover and is in the
incorrect control mode.

Enter the Menu and press
the (heating) or
(cooling) button for manual
changeover.

Manual changeover can’t be
performed from the settings
menu.

Check if the (heating)
or (cooling) button is
unavailable (dimmed button).

Manual changeover is
disabled. Manual changeover
is only possible when

Control

sequence is set to “

Heating

or Cooling”

and if

Sensor

function in

In/Out

menu is

not set to “Changeover”.

Change the

Sensor

function

in

In/Out

menu or

Control

sequence

in

Advanced

Parameters.

Sensor

function in

In/Out

menu can’t be changed.

Check if the message on the
button is

“Not connected”.

If the PT1000 sensor is not
connected to RTD terminals
or if the resistance of
connected element is less
than 803 Ω and more than
1480 Ω, then the

Sensor

function

parameter will be

unavailable.

Connect the correct RTD
sensor (PT1000) to RTD
terminals.

Setpoint buttons are not
shown on the

Home

screen.

Check if the device is in
Economy or Standby mode by
reading the status on screen.

Setpoints in these modes
can only be adjusted in the

Setpoints

menu.

Change the

Operating

mode

with button or bypass to

Comfort

mode by activating

Occupied

mode function with

button.

System is not heating or
cooling and only the Menu
button is shown on the
Home screen.

Check if

“Window is open”

message is shown on the
display and if any window in
the room is open.

The device has detected that
a window is open .

Device will exit bypass mode
when the window is closed.

“Window is open”

message is
shown on the display and all
windows are closed.

Close or open the window to
see if the device will change
operating mode.

Polarity of the window
contact is not correct.

Change the

Window

contact

polarity in

In/Out

menu.

42

C35-FC

Symptom Diagnostic Test Cause Solution

The device does not
communicate over the
BA

Cnet MS/TP network.

Inspect wires and wall
mounts for signs of damage.

Disconnected/broken/
damaged wire.

Repair or install new wiring
where necessary.

The device does not
communicate over the
BACnet MS/TP network.

Count the number of devices
on the network segment

The maximum number
of devices on a network
segment has been exceeded.

Install a BACnet router to
extend the BACnet data bus
network.

The device does not
communicate over the
BACnet MS/TP network.

Check the device ID in the
network settings menu.

Two or more devices have the
same device ID .

Assign unique ID to every
device on network.

Check the MAC address in the
network settings menu.

Two or more devices have the
same MAC address.

Assign unique MAC address to
every device on data bus.

Check the Baud rate in the
network settings menu.

The correct Baud rate has not
been confi gured.

Set the same Baud rate to all
devices on data bus.

Check the connection
terminals on the wall mount.

BACnet data bus polarity has
been incorrectly connected .

Rewire the D+ and D- signal
wires to correct polarity.

Check the

Max Master

parameter in the

Network

Settings

menu.

The

Max Master

parameter
has been incorrectly
confi gured.

Set the

Max Master

to
highest MAC address used on
data bus.

Measure the power supply
voltage on device terminals.

Incorrect voltage is being
supplied to the device.

Connect correct voltage to
device.

Check if cable termination
is enabled on fi rst and last
device on the data bus.

Incorrect signal levels are
being received by the data
bus.

Enable termination by
connecting termination jumper
to fi rst and last device on data
bus.

Check if all devices are
connected in daisy-chain
topology .

The network has not been
correctly wired.

Connect all devices only in
daisy-chain topology.

Determine the cable length
for furthest device.

Network cable length is too
long.

Ensure the total wire length
for the furthest device does
not exceed 1200 meters.

No operating mode button
on home screen

Check if

Remote controlled

information is showed on

Home

screen.

The device is remotely
controlled by C35-CBMS.

43

C35-FC

19. Device Reset

In the event C35-FC becomes inoperative, the device can be reset using the manual reset
switch,

which is located on the bottom right hand corner of the device. Gently insert a
thin object into the opening. The device should reboot through the normal boot menu.
Note: Do not touch the display during the boot menu to avoid inadvertently performing a
factory reset.

20. Factory reset

Caution: All stored data will be deleted. This should only be used in situations where all
parameters need to be reset to their default values.

The C35-FC has its factory default function built into the boot menu. To perform a factory
reset:

1. Reset the device by following procedure described in chapter

Device reset

2. When the device enters the boot menu, touch and hold the screen untilit reaches

the

“Press to reset all parameters”

section.

3. The device will boot up with all the default parameters.

NOTE: As the device has been reset to factory settings, please see chapter

6. First boot

up and commissioning instructions.

21. Calibration of resistive touchscreen

The resistive touch screen has been calibrated during the production process. In the
unlikely event that the touch screen needs to be recalibrated, please follow these steps:

1. Reset the device by following procedure described in chapter Device Reset

2. When the device enters the boot menu, touch and hold the screen until it reaches the

“Touch screen (press to calibrate)…” message, and follow the instructions on the screen.

3. Once you enter calibration, touch the screen to start procedure.

4. Press the red dot on the screen in each corner of the screen.

5. Once all four dots have been tested, the calibration procedure ends. If this needs to

be repeated, follow steps 1-4 again.

Figure 19.1.

44

C35-FC

BACnet Protocol Implementation Conformance Statement

List all BACnet Inter

operability Building Blocks Supported (Annex K):

BIBB Service

DS-RP-B Data Sharing - Read Property-B

DS-RPM-B Data Sharing - Read Property Multiple-B

DS-WP-B Data Sharing - Write Property-B

DM-DDB-B Dynamic Device Binding

DM-DOB-B Dynamic Object Binding

Segmentation Capability:

Able to transmit segmented messages Window Size _____
Able to receive segmented messages Window Size _____

Standard Object Types Supported:

An object type is supported if it may be present in the device. For each standard Object
Type supported we provide the following data:

1. Whether objects of this type are dynamically creatable using the Create Object service.

2. Whether objects of this type are dynamically deletable using the Delete Object service.

3. List of the optional properties supported.

4. List of all properties that are writable where not otherwise required by this standard.

5. List of proprietary properties and for each its property identifi er, data type, and meaning.

6. List of any property range restrictions.

BACnet Protocol Implementation Conformance Statement

- PROTOCOL IMPLEMENTATION CONFORMANCE STATEMENT (NORMATIVE)
(This annex is part of this S

tandard and is required for its use.)

BACnet Protocol Implementation Conformance Statement

Da

te: May 2, 2014
Vendor Name: KOER
Product Name: C35-FC..
Product Model Number: C35-FC--B/RS(-G)
Application Software Version: 1.0
Firmware Revision: unknown BACnet Protocol Revision: 14

Product Description:
C35-FC is a configurable zone temperature and relative humidity controller for fan coil or
floor convector systems and universal HVAC applications

BACnet Standardized Device Profile (Annex L):

BACnet Operator Workstation (B-OWS)
BACnet Advanced Operator Workstation (B-AWS)
BACnet Operator Display (B-OD)
BACnet Building Controller (B-BC)
BACnet Advanced Application Controller (B-AAC)
BACnet Application Specific Controller (B-ASC)
BACnet Smart Sensor (B-SS)
BACnet Smart Actuator (B-SA)

ANNEX A

45

C35-FC

BACnet Protocol Implementation Conformance Statement

Object Supported Object Dynamically

Creatable

Object Dynamically
Deletable

ACCUMULATOR N N N

ANAL

OG INPUT Y N N

ANALOG_OUTPUT Y N N

ANALOG_VALUE Y N N

AVERAGING N N N

BINARY_INPUT Y N N

BINARY_OUTPUT Y N N

BINARY_VALUE Y N N

CALENDAR N N N

COMMAND Y N N

DEVICE Y N N

EVENT_
ENROLLMENT

N N N

FILE Y N N

GROUP N N N

LOOP N N N

LIFE_SAFETY_
DEVICE

N N N

LIFE_SAFETY_ZONE N N N

MULTISTATE_INPUT Y N N

MULTISTATE_
OUTPUT

Y N N

MULTISTATE_VALUE Y N N

NOTIFICATION_
CLASS

Y N N

PROGRAM Y N N

PULSE CONVERTER N N N

SCHEDULE Y N N

TRENDLOG N N N

46

C35-FC

BACnet Protocol Implementation Conformance Statement

Data Link Layer Options:

BACnet IP, (Annex J)
BACnet IP, (Annex J), Foreign Device
SO 8802-3, Ethernet (Clause 7)
ATA 878.1, 2.5 Mb.ARCNET (Clause 8)
ATA 878.1, EIA-485 ARCNET (Clause 8), baud rate(s) ____________
MS/TP master (Clause 9), baud rate(s): 4800, 9600, 19200, 38400, 57600, 76800
MS/TP slave (Clause 9), baud rate(s):
Point-To-Point, EIA 232 (Clause 10), baud rate(s):
Point-To-Point, modem, (Clause 10), baud rate(s):
LonTalk, (Clause 11), medium: __________
BACnet/ZigBee (ANNEX O)
Other:

Device Address Binding:
Is static device binding supported? (This is currently necessary for two-way
communication with MS/TP slaves and certain other devices.)

Yes
No

Networking Options:
Router, Clause 6 - List all routing configurations, e.g., ARCNET-Ethernet,

Ethernet-MS/TP, etc.

Annex H, BACnet Tunneling Router over IP
BACnet/IP Broadcast Management Device (BBMD)

Does the BBMD support registrations by Foreign Devices?

Yes
No

Does the BBMD support network address translation?

Yes
No

Network Security Options:

Non-secure Device - is capable of operating without BACnet Network Security
Secure Device - is capable of using BACnet Network Security (NS-SD BIBB)
Multiple Application-Specific Keys:
Supports encryption (NS-ED BIBB)
Key Server (NS-KS BIBB)

Character Sets Supported:
Indicating support for multiple character sets does not imply that they can all be
supported simultaneously.

ISO 10646 (UTF-8)
IBMTM/MicrosoftTM DBCS
ISO 8859-1
ISO 10646 (UCS-2)
ISO 10646 (UCS-4)
JIS X 0208

If this product is a communication gateway, describe the types of non-BACnet
equipment/networks(s) that the gateway supports:

• This is not a gateway