Koer C35-FC User 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
2C35-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. Definitions
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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4C35-FC
1. Introduction
Thank you for 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: info@koer.com)
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/floor 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 floor 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 floor convector systems
• 4-pipe fan coil or floor convector systems
• 2-pipe fan coil with auxiliary heater
• 2-pipe fan coil or radiator with floor heating
• Chilled or heated ceiling
• Chilled ceiling and radiator
• Chilled ceiling and floor 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
• Configurable 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 qualified professional and
that this user manual is read carefully prior to installation. Incorrect installation may result
in malfunction, damaging the device or incorrect configuration. Please ensure you have the
correct user manual for the firmware version, as shown on the ‘About’ screen (see chapter 11.8.
About on page 21).
This manual was specifically written for Firmware Version C35-FC 1.X.
6C35-FC
3. Device Overview
Figure 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
8C35-FC
5. Mounting Instructions
Component Listing:
Component Description Quantity
1 Codis 35 1
2Wall mount bracket 1
3Screws 4
4Wall plug / screw anchor 2
Inspect your package to ensure all components are present and that the connection terminals meet the
required specifications 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 specifications
Single stranded wire 0.2 … 1.5 mm2
Fine stranded wire 0.2 … 1 mm2
Captive screw M2
Screwdriver mm
Figure 5.1.
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',0(16,216$5(,10,//,0(7(56
685)$&(),1,6+
72/(5$1&(6
/,1($5
$1*8/$5
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 powered on, a boot-up screen will be displayed. The home screen, as shown
on page 12 , will appear once the device has finished booting up.
NOTE: The internal sensors require time to stabilise and power up. Only adjust offsets
once the unit has had sufficient 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 for Building Automation and
Control Networks
C35 - FC Configurable zone temperature and relative humidity
controller for fan coil/floor convector systems and universal
HVAC applications
Season changeover Change from heating to cooling or vice versa
Control sequence This parameter defines 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 predefined set points, limitations and
options in order to reduce energy consumption in different situations. All parameters and
set point limitations for each mode are predefined 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 (figure 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 (figure 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 modified 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
comfort: 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
energy 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
significantly 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 for 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 specific times. The device will
automatically manage the HVAC system to regulate temperature within the specific 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
profiles (
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 configured.
5. To edit specific 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 profile.
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
Configuring Daily Scedules
Once the week long schedule
has been set, the daily
profiles can be inputted by
pressing one of four preset
profiles:
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
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