Koer C35-VAV... Manuel utilisateur
C35-VAV... Technical Manual
Configurable zone temperature, carbon dioxide
and relative humidity controller for VAV systems
and universal HVAC applications
Firmware Version C35-VAV 1.0
2C35-VAV 3C35-VAV
1. Introduction
1.1. Use
1.2. Hardware features
1.3. Software features
1.4. Applications
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
6.3. Carbon dioxide (CO2) 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 [1 / 5] Main Configuration
12.4. Parameters [2…5 / 5] Air volume, VAV Temperature PID and ECM
12.5. Offsets
12.6. Setpoint Limits
12.7. Language
13. Input/Output Menu
13.1. Analog input (AI1)
13.2. Binary input (BIN1)
13.3. Sensor Function
13.4. Temperature sensor
13.5. Values
14. Variable Air Volume applications using C35-VAV
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-VAV 5C35-VAV
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-VAV…) can be used for temperature, air quality and humidity control of
individual zones as part of a Demand Controlled Ventilation system, HVAC system or as a
standalone controller.
C35-VAV… can be used in HVAC systems for:
• Heating
• Cooling
• Ventilation
• Dehumidification
C35-VAV… can control of the following operational elements:
• Damper actuators
• Heat exchange actuators
• Radiator/Floor heating actuator
• Modulating electric heaters
• EC motor fan
1.2. Hardware features
Main hardware features include:
• Resistive Color TFT touchscreen display
• Built-in sensors:
- Temperature
- CO2 (optional)
- Relative Humidity (optional)
• Three analog 0…10 V DC outputs
• One analog 0…10 V DC input
• One analog resistive input
• One binary input
• RS-485 transceiver (optional)
• Galvanic isolated RS-485 transceiver (optional)
• Real Time Clock
• Easy wall mounting
• Power supply 24 V AC/DC
1.3. Software features
• PID control based on temperature, air quality and humidity parameters
• Weekly scheduler, four preset modes, 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
• Easily configurable commissioning and working parameters
• Setpoint limitations for users
• BACnet MS/TP communication protocol (optional)
• Internal Temperature Compensation Algorithm
• Factory Reset function
1.4. Applications
The C35-VAV… was designed for the following VAV applications:
• Single duct
• Single duct with electric heater
• Single duct and radiator
• Single duct with heating and/or cooling coil
Pressure independent VAV applications:
• Single duct with serial fan
• Single duct with parallel fan
• Single duct with serial fan and heating or cooling coil
• Single duct with parallel fan and heating or cooling coil
1.5. Type Summary & Ordering Info
Product
Summary
Inputs Outputs Built in Sensors Protocol Network Interface Enclosure color
0-10V Pt1000 Binary 3x0-10V Temp. Humidity CO2BACnet RS485 Isolated
rs-485
White Black
Option
Codes
-H -C -B /RS /RS-G -BLK
C35-VAV √ √ √ √ √ O O O O O √ O
√ - Available
O - Option
Ordering Code E.g. C35-VAV-C-B/RS-G
Naming
Convention
1) Device 2) Application 3) Options 4) Network Interface 5) Enclosure color
C35 VAV C = CO2 sensor Isolated RS485 White
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 page 20).
This manual was specifically written for Firmware Version C35-VAV 1.0.
6C35-VAV 7C35-VAV
4. Mounting Diagram
Great care should be taken when mounting C35-VAV... 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
• Closed spaces, for example, bookshelves or draws.
• 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)
See page 8 for mounting and page 31 for wiring instructions.
3. Device Overview
Figure 3.1.
130 cm
min.
20 cm
Figure 4.1.
Suitable mounting
locations
8C35-VAV 9C35-VAV
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.
Figure 5.2.
IMPORTANT: Before proceeding to the next step, verify all connections are in the correct
terminals and that the correct voltage is being provided.
3. Attach C35-VAV… 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.
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.
Figure 5.3.
Figure 5.4.
CODIS35v4.4
WEIGHT:
A4
SHEET 1 OF 1
SCALE:1:5
DWG NO.
TITLE:
REVISION
DO NOT SCALE DRAWING
MATERIAL:
DATE
SIGNATURE
NAME
DEBUR AND
BREAK SHARP
EDGES
FINISH:
UNLESS OTHERWISE SPECIFIED:
DIMENSIONS ARE IN MILLIMETERS
SURFACE FINISH:
TOLERANCES:
LINEAR:
ANGULAR:
Q.A
MFG
APPV'D
CHK'D
DRAWN
A
DETAIL A
SCALE 2 : 1
CODIS35v4.4
WEIGHT:
A4
SHEET 1 OF 1
SCALE:1:5
DWG NO.
TITLE:
REVISION
DO NOT SCALE DRAWING
MATERIAL:
DATE
SIGNATURE
NAME
DEBUR AND
BREAK SHARP
EDGES
FINISH:
UNLESS OTHERWISE SPECIFIED:
DIMENSIONS ARE IN MILLIMETERS
SURFACE FINISH:
TOLERANCES:
LINEAR:
ANGULAR:
Q.A
MFG
APPV'D
CHK'D
DRAWN
10 C35-VAV 11C35-VAV
6. First Power Up and Commissioning
Once C35-VAV… 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. The internal sensors
require time to stabilize and power up. Only adjust offsets once the unit has had sufficient
time (outlined below) to complete this process. Once the required time has elapsed compare
sensors readings against a reference instrument. If required, the device can be calibrated using
the Offsets menu instructions on page 25.
6.1. Temperature measurement
The C35-VAV… uses Internal Temperature Compensation (ITC) Algorithm to eliminate heat
generated by internal electronic components. The ITC Algorithm requires up to 30 minutes to
stabilize and achieve accurate temperature readings. Thermal resistance of surface on which
the device is mounted will affect temperature readings.
6.2. Relative humidity measurement
Built-in humidity sensor (optional) utilizes 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.
6.3. Carbon dioxide (CO2) measurement
The C35-VAV-C… uses Non-dispersive Infrared (NDIR) CO2 sensor to measure carbon dioxide
concentration. The sensor uses automatic calibration procedure and it requires up to 7 days
calibration. The calibration procedure keeps track of lowest CO2 concentration reading and
uses that measurement as a default calibration point. The automatic calibration procedure is
repeated on an ongoing (weekly) basis.
7. Touch screen operation and Maintenance
The C35-VAV… 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.
8. Definitions
Term Description
BACnet A communication protocol for Building Automation and
Control Networks
C35-VAV… Configurable zone temperature, carbon dioxide and relative
humidity controller for pressure depended or pressure
independent VAV systems
Changeover Change from heating to cooling or vice versa
Control mode The method used (Heating/Cooling) to bring the controlled
zone to the target temperature
Control sequence This parameter defines whether the HVAC system is capable of
heating, cooling or heating and cooling, the controlled zone
CO2Carbon dioxide (measured in ppm)
Cooling / Heating Setpoints The desired temperature range (°C)
Data Bus RS485 physical layer standard for data transition
ECM Electronically Commutated Motors. C35-VAV… is equipped
with a 0-10v output for ECM fan control
HVAC Heating Ventilation & 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,
CO2 or relative humidity, as measured by the sensor
PID controller Proportional Integral Derivative controller
ppm Parts per million
% rh Relative humidity (%)
RTD Resistive Temperature Detector
Setpoints The target value in a closed-loop feedback system
VAV Variable Air Volume
12 C35-VAV 13C35-VAV
10. Working and operating modes
Working and operating modes are switched sequentially by selecting the button 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 to notify users of the devices current status.
9. User Interface
9.1. Home Screen Overview
9.2. Navigation buttons
Below are the standard navigation buttons which appear on most settings screens.
1
2
3
6.1. 6.2. 6.3. 6.4.
9
14
12 11 10
8
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.
1. Current operating mode (Comfort, Economy, Standby)
2. Current working mode (Manual, Scheduler) or bypass status (Windows Open, Occupied
mode timer)
3. Current CO2 level (ppm) for devices with built in CO2 sensors or if external sensor is
connected
4. Operating and working mode change
5. Increase or decrease setpoints
6. Select which setpoint to adjust in Comfort mode or activate/deactivate Occupied mode in
Economy and Standby modes:
6.1. Temperature (°C)
6.2. CO2 (ppm)
6.3. Relative humidity (% rh)
6.4. Occupied mode button
7. Menu button
8. Current relative humidity (% rh) (optional)
9. Current temperature (°C) as measured by internal sensor or remote sensor
10. Indicates Heating mode is active
11. Indicates Cooling mode is active
12. Indicates Occupied mode is active
13. Date and time
5 6 5 74
Comfort mode
Manual control
Economy mode
Manual control
Comfort / Economy / Standby mode
Following scheduler
Standby mode
Manual control
13
14 C35-VAV 15C35-VAV
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 presence sensor.
Users will not be able to
adjust any setpoints from the
Homescreen unless Occupied
mode is activated from the
homescreen.
The setpoints for economy
mode can be adjusted in the
setpoints menu.
10.2. Economy mode10.1. Comfort mode
This mode prioritises
user comfort and 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.
A. Comroft mode with manual control A. Economy mode with manual control
B. Comfort mode activated by scheduler B. Economy mode activated by scheduler
C. Economy mode activated by presence sensorC. Comoft mode activated through Ocupied mode function
16 C35-VAV 17C35-VAV
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) or above
(45°c). If C35-VAV... detects
that a set point is exceeded,
the HVAC system will be
activated to protect the
controlled environment and
to ensure the temperature,
CO2 or relative humidity
remains within the desired
setpoint range.
Similarly to Economy mode,
users will not be able to
adjust any setpoints from the
Homescreen unless Occupied
mode is activated (see
below).
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
(optional).
NOTE: In Standby mode the
display will be turned off
after 5 minutes
A. Standby mode with manual control
B. Standby mode activated by scheduler
C. Standby mode activated by Window contact (if enabled in
parameters)
10.4. Scheduler
The week long scheduler allows users to set up to four presets 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 page 17 for Scheduler setup.
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. 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 1 hour. The duration can
be adjusted in the Parameters menu (see page 22). Users will be able to adjust the comfort set
points ±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 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 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.
18 C35-VAV 19C35-VAV
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 setpoints for heating,
cooling, air quality 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 input by
pressing one of four preset
profiles: Workday, Weekend,
Custom, Holiday.
A 0-24 hour timetable will
appear (Figure 11.3).
Select the button on
Menu screen to enter the
Date / Time Menu. Select
the 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, 30 minutes or never.
Dim Display: Select EDIT from
the options to enable the
screen to dim brighntes after
5, 15, 30 minutes or never.
Night Mode: Night mode
aims to reduce eye strain
in dark settings. If enabled,
screen brightness will
decreased to 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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