Danfoss CF-MC Master Controller Installation Guide

4.1 CF-MC Master Controller Mounting

Mount the CF-MC Master Controller in a horizontal upright position.

Wall Mounting:

• Remove the front cover (refer to Figure 4).
• Mount using screws and wall plugs (refer to Figure 5).

DIN-Rail Mounting:

• Attach DIN-rail mounting parts (refer to Figure 6).
• Click the unit onto the DIN-rail (refer to Figure 7).
• Release from DIN-rail if necessary (refer to Figure 8).

Important: Complete all CF-MC Master Controller installations before connecting to a 230 V power supply.

4.2 24 V Actuators

• Connect the two actuator wires to an output terminal (refer to Figure 9).
• Secure the cable using the appropriate fixing for round (Figure 10) or flat/squared (Figure 11) cables.

Note: For NC (normally closed) actuators used with Pulse Width Modulation (PWM) regulation for floor heating, no further actuator output configuration is required (see Chapter 6.1).

4.3 Relays for Pump and Boiler Control

• Pump: Connect the live wire (L) from an external power supply to the Pump Relay. Ensure the power supply is switched off before connecting. Complete other pump connections according to local regulations (refer to Figure 12). Secure the cable (Figure 13).
• Boiler: Connect the live wire (L) from an external power supply to the Boiler Relay. Ensure the power supply is switched off before connecting. Complete other boiler connections according to local regulations.

Note: The pump and boiler relays are potential-free contacts and cannot be used as a direct power supply. Maximum load: 230 V and 8 A/2 A (inductive).

4.4 Input for Away Function

• Connect the two wires from an external ON/OFF switch to the Away Function input terminals (refer to Figure 14).
• When this switch is closed (ON), the system will override the current set point for all room thermostats to 8 °C.
• Secure the cable (Figure 15).

Note: The Away Function sets a fixed room temperature of 8 °C for all Room Thermostats, which can be adjusted via the CF-RC Remote Controller. If the system is configured for cooling, a dew-point sensor can be connected instead of an external switch.

4.5 Input for Heating and Cooling

• Connect both wires from an external ON/OFF switch to the heating and cooling input terminals (refer to Figure 16).
• When the switch is closed (ON), the system switches between heating and cooling modes.
• Secure the cable (Figure 17).

Note: In cooling mode, the actuator output activates (ON for NC actuators/OFF for NO actuators) when the room temperature exceeds the set point by 2 °C. In cooling mode, a dew-point sensor should be installed and connected to the Away Function input, placed on the primary supply side.

4.6 Wiring Diagram

The wiring diagram illustrates connections for inputs (PT1000, Away Function, Heating/Cooling), relays (Pump, Boiler), and actuator outputs (1-10). It also shows the external antenna connection and the 230 V AC power supply (L, N, ~).

Diagram Description:

• Inputs: PT1000 sensor, Away Function switch, Heating/Cooling switch.
• Relays: L+N terminals for pump and boiler control.
• Actuator Outputs: Terminals 1 through 10 for actuators.
• Power Supply: 230 V AC, 50 Hz connection.
• External Antenna: Connection point shown. Maximum cable length for sensors is 3 m.

4.7 Power Supply

Connect the CF-MC Master Controller power supply plug to a 230 V power supply only after all actuators, pump and boiler controls, and other inputs are installed. If the power supply plug is removed from the cable during installation, ensure the connection is made according to existing legislation.

4.8 CF-EA External Antenna

The CF-EA External Antenna is used when transmission is obstructed by large buildings, heavy construction, or metal barriers (e.g., if the CF-MC Master Controller is in a metal cabinet).

• Remove the plastic cover from the antenna connection on the CF-MC Master Controller (refer to Figure 18).
• Connect the CF-EA External Antenna (refer to Figure 19).
• Position the CF-EA External Antenna on the opposite side of the transmission barrier from the CF-MC Master Controller.

4.9 More (2 to 3) CF-MC Master Controllers

For a trouble-free installation of a second or third CF-MC Master Controller, it is recommended to complete the installation of the first one. CF-MC Master Controller 1 should be connected to the local supply pump. Up to 3 CF-MC Master Controllers can be connected in one system. If 2 or 3 controllers are used, connect them to a 230 V power supply within 1.5 meters of CF-MC Master Controller 1 to allow simultaneous handling.

Initiating Installation:

• On CF-MC Master Controller 1 (Figure 20): Use the menu selection button (1) to select 'Install' mode. The Install LED (2) will flash. Press OK (3) to activate Install mode; the Install LED (2) will turn ON.
• On CF-MC Master Controller 2 or 3 (Figure 20): Activate installation to CF-MC Master Controller 1 by pressing OK (3). The Install LED (2) will flicker during communication and turn OFF upon completion.

Relocate CF-MC Master Controller 2 or 3 if necessary. A link test will initiate automatically upon reconnection to the 230 V power supply. If CF-MC Master Controller 2 or 3 has its own pump, its relays must be configured accordingly (see Chapter 6.5).

Note: Later removal of CF-MC Master Controller 2 or 3 from CF-MC Master Controller 1 can only be done by resetting CF-MC Master Controller 1 (see Chapter 7.2).

4.10 CF-RS, -RP, -RD and -RF Room Thermostats

Note: Assign Room Thermostats to the CF-MC Master Controller within a distance of 1.5 meters.

Activating Install Mode:

• On CF-MC Master Controller (Figure 20): Use the menu selection button (1) to select 'Install' mode. The Install LED (2) flashes. Press OK (3) to activate; the Install LED (2) turns ON.
• On CF-RD and -RF Room Thermostats (Figures 20/21): Press the push button (10). LEDs (11) and (2) flicker during communication.
• On CF-RS and -RP Room Thermostats (Figures 20/21): Press the push button (10)/(12). LEDs (11) and (2) flicker during communication.

Selecting Output on CF-MC Master Controller (Figure 20/22):

• All available output LEDs (13) on the CF-MC Master Controller light up, then the first one flashes.
• Press the output selection button (8) to select the desired output (it will flash). Confirm with OK (3).
• All output LEDs (13) turn OFF. The selected output stays ON briefly.

Room Thermostat Installation Status (Figure 21):

• Satisfactory: LED (11) goes OFF.
• Not satisfactory: LED (11) flashes 5 times.

Note: A Room Thermostat can be assigned to multiple outputs by repeating the installation process.

4.11 Other System Components

Installation procedures for other system components (CF-RC Remote Controller, CF-RU Repeater Unit) are detailed in their respective instruction manuals.

4.12 Transmission Test (Link Test)

The transmission test between the CF-MC Master Controller and other system components is initiated from those components (e.g., CF-RU Repeater Unit, CF-RC Remote Controller). Refer to their instructions for specific procedures.

Room Thermostats:

When the CF-MC Master Controller receives a transmission test signal from a Room Thermostat, the assigned output(s) will flash, allowing identification of the outputs to which the thermostat is assigned (Figure 22).

Initiating Transmission Test on Room Thermostat (Figure 27):

• Press the push button (3); LED (4) goes ON.
• Satisfactory: LED (4) goes OFF.
• Not satisfactory: LED (4) flashes 5 times.

No Link Connection to Room Thermostat:

• Try relocating the Room Thermostat within the room.
• Alternatively, install a CF-RU Repeater Unit between the CF-MC Master Controller and the Room Thermostat.

Note: CF-MC Master Controller output LED(s) connected to a Room Thermostat will flash during a Link test.

4.13 Mounting of CF-RS, -RP, -RD and -RF Room Thermostats

Mount the CF-RS, -RP, -RD, and -RF Room Thermostats sheltered from direct sunlight and other heat sources (refer to Figure 23).

Mounting with screws (Figure 24):

• 1: Back plate
• 2: Turning knob release (CF-RS and -RD only)
• 3: Back plate lock/unlock (rotate 90°)
• 4: Screw hole for wall mounting
• 5: Battery placement
• 6: Screw and wall plug

Note: Remove enclosed battery strips to activate. A Room Thermostat can be assigned to multiple outputs by repeating the installation process.

5.1 CF-RS and -RP Room Thermostat

Turning knob/cover (Figure 25):

• 1: Turning knob/cover release

CF-RS Room temperature limitation (Figure 26):

• 1: Minimum limitation (blue) (from 10 °C)
• 2: Maximum limitation (red) (up to 30 °C)

5.2 CF-RD and CF-RF Room Thermostat with Digital Display (Figure 21)

* Only valid for CF-RF Room Thermostat.

Settings available via CF-RC Remote Controller:

• ? Lock icon
• ⏰ Timer icon
• ❄️ Cooling icon**
• ? AUTO Automatic change-over icon**
• ? Heating icon**

** Only valid for CF-RD Room Thermostat. A standard CF-RD Room Thermostat can be defined as a master thermostat for sequential control of heating and cooling stages, according to room temperature. This function is available via the CF-RC Remote Controller.

Changing Default Display Temperature:

• The actual room temperature is displayed by default.
• To change the default display to actual floor surface temperature, press and hold the push button (10) until 'SET MAX' is shown.
• Press button (10) repeatedly until or is flashing.
• Use the up/down selector (9) to choose the new default display temperature: Room temperature or Floor surface temperature.

Setting Room Temperature:

• Ensure the actual room temperature is displayed.
• Use the up/down selector (9) to set the desired room temperature value. 'SET' will be shown.
• Releasing the up/down selector (9) returns the display to the actual temperature.

Note: The thermostat regulates the floor heating system based on the room temperature set point, within the defined maximum and minimum floor surface temperature limitations.

Room Temperature Limitation:

• Ensure the actual room temperature is displayed.
• Press and hold the push button (10) until 'SET MAX' is shown.
• Use the up/down selector (9) to set the maximum room temperature limitation.
• Press button (10) briefly; 'SET MIN' is shown.
• Use the up/down selector (9) to set the minimum room temperature limitation.
• Press button (10) briefly; the actual floor surface temperature is shown.

Floor Surface Temperature Limitation (CF-RF only):

• Ensure the actual floor surface temperature is displayed (indicated by ?️).
• Press and hold the push button (10) until 'SET MAX' is also shown.
• Use the up/down selector (9) to set the maximum floor surface temperature limitation.
• Press button (10) briefly; 'SET MIN' is shown.
• Use the up/down selector (9) to set the minimum floor surface temperature limitation.

IMPORTANT: Heat emission from the floor can vary, potentially affecting temperature measurement. Adjust max. and min. floor surface temperatures accordingly. Always follow the floor manufacturer's recommendations for maximum floor surface temperature. Using a mixing shunt for floor heating circuits is recommended to ensure optimal flow temperature and minimize energy consumption, preventing excessive heat transfer to the floor.

6.1 Actuator Outputs

Activate Output Mode:

• On the CF-MC Master Controller (Figure 20/22), use the menu selection button (1) to select 'Output' mode. The Output LED (5) will flash.
• Press OK (3) to activate Output mode; the Output LED (5) turns ON.

Select Output Configuration:

Press the output selection button (8) and toggle through the possible configurations. The output LEDs will indicate the selection:

• 1 LED: Outputs configured for NC actuators with ON/OFF regulation.
• 2 LEDs: Outputs configured for NO actuators with ON/OFF regulation.
• 3 LEDs: Outputs configured for NC actuators with Pulse Width Modulation (PWM) regulation for floor heating (default).
• 4 LEDs: Outputs configured for NO actuators with Pulse Width Modulation (PWM) regulation for floor heating.
• 5 LEDs: A Remote Controller is installed; settings cannot be changed from the CF-MC Master Controller.

Activate the selected output configuration by pressing OK (3).

Note: During periods with no output activations, the CF-MC Master Controller runs a valve motion program every 2 weeks, lasting up to 12 minutes. Individual output configuration is possible via the CF-RC Remote Controller (see separate instruction).

6.2 Relays for Pump and Boiler Control

Activate Relay Mode:

• On the CF-MC Master Controller (Figure 20), use the menu selection button (1) to select 'Relay' mode. The Relay LED (4) flashes.
• Press OK (3) to activate Relay mode; the Relay LED (4) turns ON.

Select Relay Configuration (Figure 20/22):

Press the output selection button (8) and toggle through the possible Relay configurations. The output LEDs indicate the selection:

• NO LEDs: Relays are not used.
• 1 LED: Pump control.
• 2 LEDs: Boiler control.
• 3 LEDs: Pump and boiler control.
• 4 LEDs: Pump control with 2 min. start/stop delay.
• 5 LEDs: Pump and boiler control, with 2 min. start/stop delay on pump (default).

Activate the selected relay configuration by pressing OK (3).

Note: If the pump relay is active, the CF-MC Master Controller runs a pump motion program every 3rd day for one minute. More relay configurations are available via the CF-RC Remote Controller (see separate instruction).

6.3 Input for Away Function and Heating and Cooling

Activate Input Mode:

• On the CF-MC Master Controller (Figure 20), use the menu selection button (1) to select 'Input' mode. The Input LED (6) flashes.
• Press OK (3) to activate Input mode; the Input LED (6) turns ON.

Select Input Configuration (Figure 20/21/22):

Press the output selection button (8) and toggle through the possible Input configurations. The output LEDs indicate the selection:

• 1 LED: Input ports are not used.
• 2 LEDs: System switches to cooling mode when heating/cooling input is activated (Figure 2 - 8).
• 3 LEDs: System switches to a fixed set room temperature of 8 °C for all Room Thermostats when the away function input is activated (Figure 2 - 9).
• 4 LEDs: System switches to cooling mode when heating/cooling input is activated (Figure 2 - 8). In heating mode, system switches to a fixed set room temperature of 8 °C for all Room Thermostats when the away function input is activated (Figure 2 - 9) (default).

Activate the selected input configuration by pressing OK (3).

6.4 Heating/Cooling

A 2-pipe system can be configured for automatic heating/cooling change-over.

• A PT-1000 pipe sensor must be connected to the PT-1000 input (Figure 2 - 10).
• Configuration is only possible via the CF-RC Remote Controller (see separate instruction).

6.5 Relays on more (2 to 3) CF-MC Master Controllers

If multiple CF-MC Master Controllers are connected in a system, their pump and boiler control relays should be configured separately.

Activate Relay Mode on CF-MC Master Controller 2/3 (Figure 20):

• Use the menu selection button (1) to select 'Relay' mode. The Relay LED (4) flashes.
• Press OK (3) to activate Relay mode; the Relay LED (4) turns ON.

Select Relay Configuration (Figure 20/22):

Press the output selection button (8) and toggle through the possible Relay configurations. The output LEDs indicate the selection:

Uses pump and boiler connected to CF-MC Master Controller 1:

• NO LEDs: Relays are not used (default).

If local manifold and pump are separate:

• 1 LED: Pump control.
• 4 LEDs: Pump control with 2 min. start/stop delay.

Activate the selected relay configuration by pressing OK (3).

6.6 Wireless Relay

The CF-WR Wireless Relay can be connected to the CF-MC Master Controller and configured using the CF-RC Remote Controller (see separate instruction).

7.1 When?

If the CF-MC Master Controller in an existing CF2+ system is reset to factory settings or replaced, all other CF2+ system components must also be reset to allow re-installation to the new or reset controller.

7.2 How?

Note: Only reset the CF-MC Master Controller to factory settings if normal in- and uninstallation procedures cannot be followed.

Resetting the CF-MC Master Controller (Figure 20/22):

• Disconnect the 230 V power supply to the CF-MC Master Controller until the Power LED (7) is OFF.
• Simultaneously press and hold the menu selection button (1), OK button (3), and output selection button (8).
• Reconnect the 230 V power supply. Release the three buttons when the Power LED (7) and all output LEDs are ON.
• The CF-MC Master Controller is reset when all output LEDs (13) go OFF.

Resetting the CF-RS, -RP, -RD and -RF Room Thermostats (Figure 27):

• Remove the Room Thermostat from its back plate (1) and disconnect one battery (2).
• Press and hold the push button (3) (Link test) and reconnect the battery (2).
• Release the push button (3) when the red LED (4) has been ON and OFF again.
• The Room Thermostat is now reset and ready for installation to a CF-MC Master Controller.

Resetting the CF-RC Remote Controller (Figure 28):

• Simultaneously activate soft key (1), soft key (2), and the down selector (3).
• The CF-RC Remote Controller will request confirmation before resetting.
• Confirming with 'yes' resets the CF-RC Remote Controller, making it ready for installation to a CF-MC Master Controller.

Resetting the CF-RU Repeater Unit (Figure 29):

• Disconnect the CF-RU Repeater Unit from the 230 V power supply.
• Press and hold the push button (1) (Link test) and reconnect the 230 V power supply.
• Release the push button (1) when the red LED (2) has been ON and OFF again.
• The CF-RU Repeater Unit is now reset and ready for installation to a CF-MC Master Controller.

8.1 CF-MC Master Controller

8.2 CF-RS, -RP, -RD and -RF Room Thermostats

* Only valid for CF-RF Room Thermostat.

Note: See separate instructions for other components.

9.1 CF-MC Master Controller

* Buzzer is shut off by pressing OK. The error indication continues until the error is fixed.

** If the room thermostat signal is lost, the CF-MC Master Controller output will be activated 15 minutes every hour for frost protection until the error is fixed.

9.2 CF-RS, -RP, -RD and -RF Room Thermostats

* Only valid for CF-RD and -RF Room Thermostats.