GVS K-BUS User manual

Gu Guangzhou Video-star Electronics Industrial Co., Ltd
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K-BUS○
RFan Coil Controller
User manual-Ver. 1
AFVF-01/220.1
KNX/EIB Intelligent Installation Systems

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Contents
1. Overview----------------------------------------------------------------------------------------------------------------------------------- 2
1.1Products and Function Overview-------------------------------------------------------------------------------------------------- 3
2. Technical Data, Dimension and Circuit Diagram----------------------------------------------------------------------------------- 4
2.1 Technical Data------------------------------------------------------------------------------------------------------------------------ 4
2.2 Dimensional Drawing--------------------------------------------------------------------------------------------------------------- 5
2.3Wiring Diagram (Taking Continuous Valve for Example)-------------------------------------------------------------------- 6
3. Project Design and Application--------------------------------------------------------------------------------------------------------7
3.1 General Introduction-----------------------------------------------------------------------------------------------------------------7
3.2 System Mode and Button Operation Introduction----------------------------------------------------------------------------- 7
3.3 Coil System--------------------------------------------------------------------------------------------------------------------------- 8
3.4 Fan System---------------------------------------------------------------------------------------------------------------------------- 8
3.5 Room Temperature Control Mode and Setting Temperature Adjustment--------------------------------------------------9
3.6 Type of control----------------------------------------------------------------------------------------------------------------------10
4. ETS System Parameter Setting Description----------------------------------------------------------------------------------------11
4.1 Outline--------------------------------------------------------------------------------------------------------------------------------11
4.2 Parameter window “General”---------------------------------------------------------------------------------------------------- 12
4.3 Parameter window: “Temperature setting”------------------------------------------------------------------------------------ 15
4.4 Parameter window "Setpoints"---------------------------------------------------------------------------------------------------19
4.5 Parameter window "Controller"------------------------------------------------------------------------------------------------- 22
4.6 Parameter window "Fan"----------------------------------------------------------------------------------------------------------24
4.7 Parameter window “heating valve” and “cooling valve’--------------------------------------------------------------------28
4.8 Parameter window "Window contact"------------------------------------------------------------------------------------------34
4.9 Parameter window "Temperature monitoring"--------------------------------------------------------------------------------36
4.10 Parameter window “Scene”----------------------------------------------------------------------------------------------------- 39
4.11 External control parameter setting interface--------------------------------------------------------------------------------- 41
5. Description of the communication objects----------------------------------------------------------------------------------------45
1. Overview

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This manual provides detailed technical information about the Fan Coil Controller for users as well as
assembly and programming details, and explains how to use the Fan Coil Controller by the application examples.
To achieve convenient installation in distribution box, the Fan Coil Controller is designed to a modular installation
device, and is installed on 35mm DIN Rail according to EN 60 715. It adopts screw terminal to achieve electrical
connection. The connection to EIB/KNX BUS is established via EIB connecting terminal. It requires a 230V AC
power supply.
The Fan Coil Controller can be connected to other EIB/KNX devices to make up the system via EIB/KNX
BUS.
1.1Products and Function Overview
The Fan Coil Controller can work after connecting 230V AC voltage input and bus power supply directly,
without extra power. The parts of valve need voltage input of 75V~265V AC according to demands. It is able to
use the Engineering Tool Software ETS (ETS3 or later) with a VD4 file to allocate the physical address and set
the parameters.
The Fan Coil Controller outputs heating and cooling according to temperature’s setting, and the max. load
current of valve output is 2A. There are 3 levels of fan speeds, and max. load current of each level reaches 6A.
Both valves of heating and cooling and fan speeds can be switched on or off by manual buttons, and their status
are shown by LED.
The functions of the Fan Coil Controller are shown as follows:
Output heating and cooling according to temperature’s setting
Output modes of Standby, Comfort, Night and Protection according to user’s demands.
Control fan speeds in 3 gears (High, Medium, and Low) manually or automatically.
Control the raise/lower valves and ordinary switching valves intelligently and manually.
Achieve continuous or PWM output control for valves by PI controlling value.
Report local fan speeds and valves’ status.
Obtain temperature data from local or BUS, and achieve the monitoring function to actual temperature and
frost temperature.
Scene control, output specific operation mode and speed directly via recall scene.
Detect shutter’s on-off status or binary input.
Achieve the controlling by external controller ( e.g. via the Panel of Temperature Controller )

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2. Technical Data, Dimension and Circuit Diagram
Fan Coil Controller is a modular installation device, and installed on 35mm DIN Rail in distributor box. It is
connected EIB/KNX system via BUS connecting terminal.
2.1 Technical Data
Power Supply
Bus voltage
21-30V DC, via the EIB bus
Current consumption, bus
<12mA
Power consumption, bus
<360mW
Input Voltage
230 V AC +/-10%（50/60Hz）
Total Power Consumption
1.4W
Control of Heating/Cooling
2 folds Valve Control
Raise/lower valve and thermal valve can be
connected. One fold for heating, the other for
cooling.
Nominal Voltage
75V~265V AC (220VAC or 110VAC Motor)
Nominal Current
2A
Cable Length
Max. 20m (cross-sectional: 1-1.5mm2)
Fan Control
1 fold Fan
3 level fan speeds
Nominal Voltage
230V~（50/60Hz）
Nominal Current
6A
Note：In the case that above 3 level speeds are used as independent switching
outputs, the max. Current of each output 6 A, and the total of 3 outputs
cannot exceed 13A.
Binary Input
1 fold
For shutter’s on/off status and binary input
input Voltage
9V~265V AC/DC
Cable Length
Max. 100m (cross-sectional:1- 1.5mm2)
Tem. Measurement
Three-wire system PT1000 Tem.
Sensor
It is used to detect room temperature
Measuring Scope of Tem.
– 45°C ... + 80°C
Cable Length
2m
Buttons and Indicator LEDs
Fan Gears
1 button and 3 green LED
Operation modes
1 button and 4 red LED

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Heating/cooling
2button and 1 red & blue LED
Programming
1buton and 1 red & green LED
Please refer to section 2.3 for location of Button and Indicator LED, and 3.2
for operation description
Temperature rang
Operation
-5℃... + 45 ℃
Storage
-25℃... + 55℃
Transport
-25℃... + 70℃
Dimensions
90 x 72 x 64.2 mm
Installation
On 35mm DIN Rail, and on clean, dry indoor places
Safety class
-II
to EN61140
Electronic control
Type1.B
To EN 60730-1
Weight
0.3kg
Color
Grey
2.2 Dimensional Drawing

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2.3Wiring Diagram (Taking Continuous Valve for Example)
①Power supply for valve
⑧Temperature sensor input
②Heating Valve (1-close, 2-open)
⑨Power supply 230V AC
③Cooling Valve (1-close, 2-open)
⑩manual buttons, from left to right: operation modes,
Fan speeds, Heating and Cooling
④Control Mode Indicator LED
⑪Indicators of Fan speed (LO-Low, Me- Medium, and
HI-High) and Heating/Cooling
⑤Testing Button
⑫Indicators of Room operation Mode: S- Standby, C-
Comfort, N-Night, P-Protection
⑥Programming Button
⑬output 3 fan speeds: LO, ME , HI
⑦Programming LED
⑭Binary Input
μThis symbol indicates Micro-disconnection on operation, Type 1.B
This symbol indicates Class II
This symbol indicates separate collection for electrical and Electronic equipments.

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3. Project Design and Application
3.1 General Introduction
Application Program
Max. number of
Communication Objects
Max. number of
Group Addresses
Max. number of
Associations
Fan coil Controller
38
50
50
The Fan Coil Controller controls Fan’s fan speeds and Valve’s opening degree intelligently by PI Algorithm,
and achieve heating/cooling to make rooms comfortable through comparison between setting temperature and
actual temperature. The Fan Coil Controller contains 1 fold temperature data collection, 1 fold binary input, 1 fold
Fan control and 2 folds Valve control.
3.2 System Mode and Button Operation Introduction
The Fan Coil Controller has 3 control modes: Automatic Control Mode, Manual Control Mode and Testing
Control Mode.
Automatic Control Mode: When testing/auto indicator light is off, the mode is automatic control. In this mode,
Fan Coil’s output is controlled via the Fan Coil Controller, and the mode can be switched to testing or manual
control mode, as well as room operation modes can also be switched by manual button.
Manual Control Mode: When testing/auto indicator light is on, the mode is manual control. The manual control
mode can be activated via recalling scene (Object 12) or controlling fan speed manually (Object 15), and be
returned to the automatic control mode via setting Object 16 to 1. The Manual control mode refers to adjusting
Fan’s fan speed via KNX telegram (Note: this mode is for Fan only, the Valve is still controlled automatically). In
this mode, room operation modes can be switched by manual button, and the control mode only can be switched to
the Automatic Control Mode.
Testing Control Mode: When testing/auto indicator light is flashing, the mode is testing control. The mode can
be activated or returned to automatic control mode via pressing testing button for 2s. In this mode, output of valves
can be controlled via heating button and cooling button. Besides, for local continuous raise/lower valve the
controller can control it pause via pressing heating or cooling button for 2s and the heating/ cooling indicator would
flash. The pause function can be exited via a short operation of the button. The Fan speeds can be adjusted via

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fan-speed button; the fan-speed gear is change via a short operation, the current speed is switched on or off via a
long operation, and the corresponding indicators would on or off. In this mode, room operation modes cannot be
changed, and the control mode only can be returned to the Automatic Control Mode.
3.3 Coil System
Fan Coil can be designed as 2-pipe, 3-pipe, or 4-pipe version, according to hot and cold water’s circulation
loops.
The 2-pipe version consists of a single water circulation loop for both hot and cold water. It is achieved only
by connecting one fold valve to control flow of hot and cold water, and the default connecting is heating output. In
lots of practical application, only cooling is carried out via a 2-pipe fan coil, and heating is implemented by other
conventional heaters.
The 3-pipe and 4-pipe versions are quite similar to each other. For 3-pipe version, the hot and cold water have
separate inlet, while they share one outlet. The 4-pipe version has separate water circulation loops for both hot and
cold water. For both 3-pipe and 4-pipe, hot and cold water’s flow can be controlled by connecting to Fan Coil
Controller’s control terminal of heating and cooling valve.
Valve has two types: Raise/ lower valve and Thermal valve. Raise/ lower valve control valve’s opening
according to its run time, to achieve status of on, off and pause. It is 3-wire system, shown as wiring diagram.
Thermal valve is usually divided to normally open type and normally closed type, and has only two statuses: on/off.
It is 2-wire system, and one for valve’s open (as wiring diagram ②and ③of 2 shown), the other for null line of
valve power supply ( as wiring diagram ① of 2 ) .
3.4 Fan System
Fan system can control local Fan, as well external Fan, and it is achieved via parameter setting of “Type of
fan”
Fan can be controlled both automatically and manually. Auto control is Fan Coil’s control according to
algorithm output. Manual control is used to adjust current fan speed according to KNX telegram. Under manual
control, Fan cannot be controlled by Fan Coil, unless the mode is auto control.
Auto-control Fan adopts stepping sequence, that is, the fan speed can be adjusted step by step only, but not
phase step. For example, to change current gear 0 to 3, the operation order is 1->2->3, and between each two gears,
it would stay at least 2mins due to the parameter “Minimum delay at fan speed”. The limitation is un available
when it is manual mode or testing mode.

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3.5 Room Temperature Control Mode and Setting Temperature Adjustment
Room Temperature Control Mode
Room temperature control has 4 modes: comfort mode, standby mode, night mode, and protection mode,
and it is used to adjust rooms’ setting temperature, and it can be switched via KNX BUS or room mode button.
Via KNX BUS, to select a 1byte communication object or three 1bit objects can help to switch room modes.
When selecting three 1bit objects as above-mentioned, the objects have priority as follows: protection
mode >comfort mode > night mode > standby mode. Writing “1” on the relevant object enables room mode, and
writing “0” disable it. When lower priority would replace the higher priority, close the latter first. When object 9,
object 10 and object 11 are “0”, the mode is lowest priority – standby mode.
When selecting a 1byte to switch to room mode, value 0: stay; value 1-4 represent comfort mode, standby
mode, night mode, and protection mode respectively; value 5-255, invalid.
Setpoint values
Setpoint value is configured in the parameter window “Setpoints”.
Setpoint temperature of actual output can be calculated according to following:
Comfort mode: Heating: Setpoint temperature = Base setpoint temperature + Setpoint adjustment
Cooling: Setpoint temperature = Base setpoint temperature + Setpoint adjustment + Insensitive
zone + external temperature correction ( Pls refer to “External temperature” in the
parameter window “Temperature setting ” under cooling control )
Standby mode: Heating: Setpoint temperature = Base setpoint temperature – Reduces heating in standby mode +
Setpoint adjustment;
Cooling: Setpoint temperature = Base setpoint temperature + Increased cooling in standby
mode + Setpoint adjustment
Night mode: Heating: Setpoint temperature = Base setpoint temperature –Reduces heating in night mode +
Setpoint adjustment;
Cooling: Setpoint temperature = Base setpoint temperature + Increased cooling in night mode +

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Setpoint adjustment
Protection mode: Heating: Setpoint temperature = Threshold value for heat protection
Cooling: Setpoint temperature = Threshold value for frost protection
Setpoint adjustment is realized via object 5.
Note: When user chooses “Heating and cooling ” of “Controller mode in Heating/Cooling” in the
parameter window “General”, auto control to toggle heating and cooling is related to setting temperature
in comfort mode only, that is, the comparison between setting temperature and actual temperature
generate heating or cooling.
3.6 Type of control
Continuous control
Continuous control is based on the actual temperature and set the thermometer calculates a control value, and the
valve opening degree of the continuous control, the temperature to achieve a comfortable condition. For example: the
current control value is the maximum 50% of the control value , then the valve position will be under the control value to
50% open position ; If the control value output to the maximum control value , the valve will be fully open. Continuous
control can be achieved "on" and "off” and “stop" three-step operation, the specific action as shown below:
Continuous control, can achieve the most accurate temperature control, no considerable overshoot. Meanwhile, the
positioning of the valve drive frequency can be maintained at a low level. Continuous control can be used with the Fan
Coil Controller for electromotive raise/lower valves or KNX valve drives.

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PWM control
PWM (pulse width modulation) control is based on the actual temperature and set the thermometer calculates a
control value, and then calculates the valve opening and closing time of the switch valve is controlled to achieve a
comfortable temperature state. On/off valve that only “full open" and “fully closed” two kinds of control operations.
PWM control need to set a fixed cycle time period, For example, set the PWM period of 15 minutes, when the control
value is the maximum 20% of the control value, the valve will open 15 * 20 % = 3 minutes; Off 15 * 80 % = 12 minutes;
when the control value is the maximum control value of 50 %, the valve will open 15 * 50 % = 7.5 minutes; off 15 * 50
% = 7.5 minutes. Diagram is as follows:
PWM control is a relatively accurate adjustment, if you select the appropriate cycle, temperature overshoot will not
be great, and you can use a simple low cost general switching valve actuator. Fan coil can be used to control the common
switching valve, electric valve or KNX valve drives.
4. ETS System Parameter Setting Description
4.1 Outline
Fan coil controller either as a master device can also be used as the controlled device.
1. Local（master device）
Local control fan coil controller acts as the master role, which according to the set temperature and the actual
temperature difference to calculate the control value, thus control the valve and the speed. In this mode, the local
wind speed and valve can be controlled by own, or via bus fan speed and valve of the external fan coil can be also
controlled.

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2. Bus (controlled device)
As controlled by the external control fan coil controller role, and its temperature is not monitored and does
not output the control value, but by an external controller (e.g., temperature and humidity sensors, temperature
control panel, etc.) is sent to the control value for the output control. In this mode, the control value from external
only can control the fan coil local control valve and speed controller.
4.2 Parameter window “General”
"General" parameter setting interface shown in Figure 4.2, this parameter setting window is mainly set some
basic parameters of fan coil controller. Intro of each parameter follows.
Fig.4.2 parameter window “General”
Parameter：Controller from
Options：Local
Bus
This parameter sets the fan coil controller source. Wind speed and valve of fan coil controller can be locally
controlled by an internal controller (the connected temperature sensor in the input), can also be controlled via bus
(such as temperature panel).
“Local” shows that the outputs of the fan coil controller are controlled by the internal controller, i.e. as the
master device. In this mode, the fan coil controller can either control the local wind speed and valve, or can also

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control the wind speed and valve of external fan coil controller via bus.
"Bus" shows that the fan coil controller is controlled by an external controller, i.e. as the controlled device; in
this mode, the outputs of the fan coil controller are controlled via bus.
Since the sources are not the same, so their parameter settings are also not the same, we then introduce "Local"
parameter settings, "Bus" in case of parameter settings to 4.11 do detail.
Parameter：Controller mode in Heating/Cooling
Options：Heating
Cooling
Heating and cooling
This parameter sets the HVAC heating and cooling.
Select the "Heating", controller is in heating control state, then fan coil only achieved heating function;
Select "Cooling", controller is in cooling mode, the cursor can only achieve cooling,
If select "Heating and cooling", both heating and cooling can be achieved, fan coil controller outputs
automatically heating or cooling according to the set temperature and the actual temperature difference and the dead
zone. Meantime, the corresponding parameters will be visible.
Parameter：Valve
Options：1 channel for heat/cool(2 pipes system)
2 channels for heat/cool(4 pipes system)
This parameter sets the water pipe type of fan coil.
"1 channels for heat / cool (2 pipes system)" for the heating and cooling shared an inlet and outlet pipe, that is
hot and cold water pipes are out from a pipe. In the case, you only need a valve to connect with heating valve output
of fan coil controller;
"2 channels for heat / cool (4 pipes system)" for the heating and cooling, respectively, have their own pipe to
in and out water, requires two separate control valve to control in and out of hot and cold water.
Parameter：Choose heating or cooling by
Options：Local
Bus
This parameter is visible if the option "1 channels for heat / cool (2 pipes system)" is select in the parameter
"Valve", which is used to set heating or cooling for the 2 pipes system.
With “Bus”, the cooling and heating can be controlled via external input, and the control of cold or hot water

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is realized via the communication object 7 and 8.
"Local" means that the actual temperature and the set of local parameters to determine the output control of
heating or cooling.
Parameter：Insensitive zone between heating and cooling
Options：[°C] 0.5...6.0
This parameter set the dead zone that is used to switch automatically heating and cooling. When the smaller
the value of the dead zone, the faster switching between heating and cooling according to the temperature, but the
heating and cooling frequent exchange; larger values when the dead zone is not so frequent exchange heating and
cooling, energy conservation, but switching heating and cooling of the reaction is slow. Dead zone temperature
usages see 3.5 Introduction. The parameter will be visible in the parameter window "General" of the "Controller
mode in Heating / Cooling" with the option "Heating and cooling".
Parameter：Minimum changeover time between heating and cooling
Options：[min.] 0...255
This parameter sets the minimum pause in minutes when toggling between heating mode and cooling mode.
Mainly prevent frequent switching heating and cooling, and energy conservation.
Parameter：Delay time to recover automatic mode
Options：[min.] 0...255
This parameter set the delay time from the manual or test mode switch back to automatic mode.
With option "0", the controller does not automatically switch back to automatic mode until the user via the
KNX communication objects or local button to switch back to automatic mode;
For "1-255" the manual mode or test mode will switch back to automatic mode after delay.
Parameter：Send RHCC and HVAC status
Options：Do not send
Send on change
Send cyclically
The parameter sets the transmission event for the HVAC and RHCC status.
With "Do not send” two status reports is not sent.
With "Send on change", the status is only sent if there is a change in the object value.
With "Send cyclically”, the object value is sent according to the parameterized period for cyclical sending, but

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also sent when changes.
Parameter：Period of sending fan coil status
Options：[min.] 1…255
This parameter sets the period for cyclical sending the RHCC and HVAC status. This parameter is visible
when the option "Send cyclically" in the parameter "Send RHCC and HVAC status" is selected.
Parameter：Fan,dependence on ventilator and mode change of operational mode
Options：No dependence
Switch fan to automatic on mode change
Switch comfort mode on manual operate fan
This parameter sets the connection between the fan and the operation mode.
"No dependence" indicates no relationship between both of them;
If "Switch fan to automatic on mode change" is selected, and the fan is in manual control (via the object 15),
fan coil control is automatically switched to automatic control mode when the operation mode changes via KNX
telegram.
If "Switch comfort mode on manual operate fan" is selected, and the room of control mode is not comfort
mode, the fan coil control is automatically switched to the comfort mode when the fan speed changes via KNX
telegram (the object 15).
4.3 Parameter window: “Temperature setting”
Parameter window "Temperature setting" is shown in Figure 4.3. The window primarily sets the basic
parameters of the temperature. "Actual temperature" and "External temperature" two parts, of which "External
temperature" parameters are visible with the option "Cooling" or "Heating and cooling" in the parameter
"Controller mode in Heating / Cooling" of the "General" parameter window. The following detailed describe
settings of each parameter.

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Fig. 4.3.1 parameter window “Temperature setting”
Actual temperature
Actual temperature, mainly setting the way of collecting temperature, temperature type and correction,
monitoring and sending of the temperation and so on.
Parameter：Actual temperature from
Options：Local
Bus
Setting the temperature sensor.
If the temperature sensor PT1000 is connected to the Fan Coil Controller, the option “Local” must be selected.
If the temperature is received via the KNX, the option “Bus” must be set.
Note: The fan coil controller needs to know the current heating or cooling output clearly to control to work
properly, the heating or cooling can be the actual temperature and the set temperature compared to determine, in
some cases need to clear through the communication objects, such as the two coils control systems and as a
controlled device.
Parameter：Temperature type
Options：Centigrade
Fahrenheit

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This parameter is set to the bus output, or received from the bus type of the actual temperature.
"Centigrade" indicates the actual temperature is expressed in degrees Celsius;
"Fahrenheit" indicates the actual temperature is Fahrenheit.
Wherein the relationship between Fahrenheit and Celsius are as follows: F = 32 + °C × 1.8.
Parameter：Temperature correction
Options：[val x 0.1°C] -50...50
Correction of the value measured by the temperature sensor PT1000 or the actual value received via the KNX.
When the temperature sensor receives the temperature value and the actual value of the parameter deviation
can be corrected. For example: no output before calibration temperature of 25 degrees, but the indoor temperature is
25.5 degrees, then the database where the calibration temperature must be set to 5 ( 0.1 * 5 ), and then re-download
the database, it will have 25.5 degrees output temperature.
Parameter：Monitoring period of actual temperature
Options：[min.] 2...255
Setting the monitoring period for the actual temperature (local and via the KNX).
When the temperature is up from the Bus, then within the set time did not update, then it is wrong temperature,
the corresponding telegram is sent "True"; when the temperature reading from the Local, at this set time has
remained the same a temperature value, it is considered wrong temperature, the corresponding telegram will be sent
"True". Error occurs when the control value output parameter page "Temperature monitoring" parameter "when
actual temperature is absent or in event of frost" setting maximum control value ( 10,000 ) Percentage.
Note: If a sensor value is received via the KNX, the monitoring period should be selected so that it is at
least twice as long as the cyclical transmission period of the sensor so that an error message is not sent
immediately when a signal fails to appear.
Parameter：Sending of error signal
Options：Do not send
Send on change
Send cyclically
This parameter is setting to send the actual temperature of the wrong way.
"Do not send" when an exception occurs for the actual temperature is not transmitted to the bus error status
report;
"Send on change" is the actual temperature of the abnormal state when there is a change on the transmission
error status value, which is only made when actual temperature anomaly a "1" (True means 1), until the actual

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temperature returned to normal hair only a "0" (Flase means 0);
"Send cyclically" send for the cycle, depending on the setting of the transmission time , time to send a
message , but the actual temperature anomalies also sent telegram, and sent at this time to re-cycle timing .
Parameter：Period of sending
Options：[min.] 1…255
This parameter is setting when actual temperature occurs an exception, the controller sends the error status
reporting time period to BUS. This parameter only "Sending of error signal" option to "Send cyclically" is visible.
Parameter：Send the actual temperature
Options：Do not send
Send on change
Send cyclically
This parameter is setting to read from the local pt1000 temperature sensor value and sent to the BUS.
"Do not send" the local acquisition temperature does not occur on the bus made;
"Send on change" for the local temperature changes when a certain value, the controller transport the
temperature value on the bus;
"Send cyclically" Send for the cycle, that is every once in a while to send a temperature value. This parameter
is only "Actual temperature from" option for the "Local" visible.
Parameter：Send temperature at variation of
Options：0.1…5
This parameter is to set the actual temperature variation. When the actual temperature changes every time the
option value, the fan coil controller will be sent to the bus once the actual temperature. This parameter is only "Send
the actual temperature" option to "Send on change" visible.
Parameter：Time lag of sending actual temperature
Options：[min.] 1…255
This parameter is set to send the local actual temperature period time. This parameter is only "Send the actual
temperature" option to "Send cyclically" visible.
External temperature
External temperature only in the case of a cooling occurs , the parameter item in the "General" parameter page
"Controller mode in Heating / Cooling" is selected for "Cooling" or "Heating and cooling" is visible . Mainly used
to adjust the room temperature setting , indoor outdoor temperature can not be too large. As below:

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Fig. 4.3.2 parameter window “External temperature”
4.4 Parameter window "Setpoints"
"Setpoints" parameter setting window is shown in Figure 4.4. It is for setting the basic setpoint temperature of
heating or cooling. Divided into "Base setting", "Heating" and "Cooling" three parts, "Heating" and "Cooling"
parameter can be seen when choosing the appropriate heating or cooling option in parameter "Controller mode in
Heating / Cooling" in the "General" page, Following is detail description for each of the parameter settings.

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RKNX/EIB Fan Coil Controller
20
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Fig. 4.4.1 parameter window “Setpoints”
Base setting
Setting the basic setting for either heating or cooling
Parameter: Base setpoint temperature
Options: [° C] 15 ... 30
This parameter is a reference value to set the set temperature, the set temperature of room modes generated via
the value.
Parameter: Controller status at power on
Options: Standby mode
Comfort mode
Night setback
Frost protection
Setting of the operation mode when connecting the supply voltage.
Parameter: Extended comfort mode
Options:[min.] 0 ... 1-255
The comfort mode parameter is set delay time. When the setting is "0", it means do not use comfort mode
delay function; when set value at 1-255, the room mode Night mode switch back from comfort mode, this function
is enabled, comfort mode will be delayed user settings, when the delay time exceeds the set value, it will
automatically switch to night mode. This mode is only for night mode and comfort mode switch.
Parameter: operating mode switchover
Options: 1bit
1byte
This parameter sets the operating room Switching mode.
Select 1bit, according to the writing of ON or Off, switch to a different mode. Switch to the attention of
priority, if you want to enter the low level mode, you must first close the high level mode, otherwise unable to enter
the low level mode. Mode priority is as follows: Mode of priority is as follows: protected mode (Frost / heat
protection mode)> Comfort mode (comfort mode)> Night mode (night mode)> standby mode (standby mode).
When selected 1byte, 1 comfort mode, said preparation mode 2, 3 for the night mode, 4 denotes a protective
mode, different values   are written into the mode is not the same.
Parameter: Send the setpoint temperature
Options: Send on change