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LUNA RC a
Instructions for Use

Symbol explanation

Symbols on the machine.
This product complies with applicable EU
directives.
Symbols in this user manual
Warning/Caution!

Application area

LUNA RC is a controller that has been designed to regulate
room temperature as well as VAV control applications.
The product may not be used for anything other than its
intended use.

General

Read through the entire instructions for use before
you install/use the product and save the instructions
for future reference. It's not permissible to make changes
or modifications to this product other than those specified
in this document.

Protective equipment

Always use appropriate personal protective equipment
for the work in question, in the form of gloves,
respirators and protective glasses during handling,
installation, cleaning and service/maintenance.

Electrical safety

Permitted voltage, see "Electrical data". It is not
permissible to insert foreign objects into the product's
contactor connections or the electronics's ventilation openings;
risk for short circuiting.
24 V isolation transformer to be connected should comply
with the provisions of IEC 61558-1.
Cable sizing must be carried out for cabling between the
product and the power supply source.
Disconnect the power supply when working on products
that are not required to run in production.
Always follow the local/national rules for who shall be
permitted to carry out this type of electrical installation.
The document was originally written in Swedish

Handling

• The product must be handled with care.

• Installation

• Moist, cold and aggressive environments must be
avoided.
• Avoid installing the product near a heat source.
• Assemble the product according to applicable industry
regulations.
• Install the product for easy access during service/
maintenance.
• If the product is mounted above a fixed ceiling, the
inspection hatch must be located so that the product is
accessible for inspection.
• Check to make sure that the product doesn't have any
visible defects.
• Check that the product is properly secured after it has
been installed.
• Check that all cables are properly secured in place after
installation.
20220808

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Table of Contents
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Summary of Contents for Swegon LUNA RC a

  • Page 1: Symbol Explanation

    LUNA RC a Instructions for Use 20220808 Symbol explanation Handling • The product must be handled with care. Symbols on the machine. • Installation This product complies with applicable EU • Moist, cold and aggressive environments must be directives. avoided.
  • Page 2: Table Of Contents

    Set point for temperature.......... 22 Fan speed ..............24 Sensor selection ............24 Output limits ............25 Output overdrives ............. 26 Service alarm ............28 Network description ..........28 Modbus .............. 29 Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 3: Installation

    3.6 mm 1,5-1,8 m LUNA RC TEMP-MB LUNA RC CO -TEMP-MB 6.2 mm Figure 1. Recommended installation in room. 60 mm Figure 3. Dimensions, LUNA RC TEMP-MB and LUNA RC CO -TEMP-MB rear. 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 4: Connections

    • The controller’s settings remain the same during a power failure. • Overdrives that have occurred through Modbus are deleted during the power failure. The parameters that are reset are marked in the Modbus register that begins on page 29. Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 5: User Mode

    Control button for fan speed • 0=STOP • 1=Speed 1 • 2=Speed 2 • 3=Speed 3 • A=AUTO Button for “Occupancy” (Man in house) 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 6: Commissioning

    2. Set the selection button for configuration mode in the closed position 3. Make the settings that the process requires 4. Set the selection button for configuration mode in the open position. The controller reverts to user mode Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 7: Menu Structure

    The menu is enabled by setting the selection button for configuration mode in the closed position. Proceed in the menu by pressing the buttons. Change the values using the buttons. Accept the values with the button. The following menu structure indicates the factory settings. 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 8: Control Methods

    2-step, the step sequence for heating is always: 1. Valve Heating Cooling 2. VAV Cramp Cooling step CSEq Cooling step sequence Valve Vmin% Minimum VAV output *) e.g. 20% Using the fan Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 9: Heating With Heating Elements And Cooling With Beams

    In such situations, you can enable the function that prevents valve blocking. When the MJAM parameter is in the ON position, the valves are opened and closed for 5 minutes, once a day. 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 10: Heating With Heating Elements And Cooling With Fan Coils

    The fan’s speed 3 disabled OFF When FANLI=ON, fan speed 3 is disabled in auto mode (e.g. due to noise). However, the user can connect speed 3 manually When FANLI=OFF, speed 3 is permitted in auto mode Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 11: Fan Regulation (Control)

    • When the parameter FAN=is OFF, the 3-step fan operates at speed 1 and the valve is fully open. The fan is then controlled to speed 2 (66%) or 3 (100%) if required. Heating and 1-step cooling, the valve is opened before the fan speed increases, see page 8. 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 12: Heating With Heating Elements, Cooling With Vav And Beams, Ventilation On Request (Co )

    40018 Regulation, fresh air 0=CO2 / T, 1=DAY/T, 2=CO2 3=DAY DI1bst 40026 Minimum VAV output in day 100% Minimum VAV output when the controller mode is set to day mode ABC calibration Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 13: Improve The Use Of Fresh Air According To Carbon Dioxide Level

    • The parameter DI1bst (minimum VAV output when the controller is in day mode) has a value that is not zero (e.g. 80%) Note: When the parameter F Air is “1”, the Y1 output is determined as the maximum value according to the aforementioned regulations or temperatures. 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 14: Thermostat Mode

    50.0 100.0 Vmin% 40034 Minimum VAV output 50.0 Vmax% 40035 Maximum VAV output 100.0 50.0 100.0 ThrmC Thermostat function, OFF=P/PI controller, ON=thermostat mode cooling ThrmH Thermostat function, OFF=P/PI controller, ON=thermostat mode heating Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 15: Regulating The Electric Heater

    0=nc, 1=no (nc/no) DI1mod 40021 DI1 mode 0=not used, 1=regulate to day mode with nc/no switch connected to DI1 input DI1dir 40022 DI1 direction of operation in night mode: 0=nc, 1=no (nc/no) 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 16: Use Of The Digital Input Di1 And Its Functions

    DI1 delay passive to active Delay in minutes when switching from night mode to day mode DI1 d2 40024 DI1 delay active to passive Delay in minutes when switching from day mode to night mode Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 17: Use Of The Digital Input Di2 And Its Functions

    It is possible to adjust the temperature measurement, if necessary Note: Eliminate all fault factors that can affect the temperature measurement before changing this parameter. It is not possible to reset the parameter to the factory setting. 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 18: Regulating Day And Night Mode

    ON=The value from Modbus to day mode NIGHT Selection of night/day OFF=the controller is and remains in day mode mode, ON=the controller is in night mode unless it has been specially regulated to day mode Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 19: Temporary Day Mode

    Source of fresh air regulation 0=CO2/T, 1=DAY/T, 2=CO2 3=DAY type Function for the occupancy Set the parameter value to VAV (1) button Vmax% 40035 The VAV output’s maximum 100.0 50.0 100.0 value 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 20: Use The Extended Dead Zone In Night Mode

    2=DI2 contact for doors/windows (prevents both heating and cooling), 3=DI2 condensation switch (prevents cooling) nl OP Night operating mode DZ=dead zone, FG=frost protection mode NDZ °C 40019 Night mode’s dead zone 10.0 NDZ °C Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 21: Asymmetric Dead Zone

    2=DI2 contact for doors/windows (prevents both heating and cooling), 3=DI2 condensation switch (prevents cooling) nl OP Night operating mode DZ=dead zone, FG=frost protection mode FG °C 40020 Set point for frost protection 17.0 50.0 FG °C thermostat 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 22: Set Point For Temperature

    The parameter value SPcnt is 21°C and the user has changed the set point to 23°C (the deviation is +2°C). The parameter value SPcnt is changed to 22°C through Modbus (register 40011). → The controller uses 24°C as the actual set point (22°C + 2°C=24°C). Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 23 Note: It is also possible to write the set point to Modbus register 40002. However, the value for register 40011 is shown on the display when you press the - and + buttons. 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 24: Fan Speed

    U1mod 40027 U1 mode 0=not used, 1=external set point, 2=temp. measurement with 0…10 V transmitter (Note: The external sensor is not available if the 0...10 V transmitter is selected) Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 25: Output Limits

    The heating actuator’s maximum value 100.0 50.0 100.0 Fmin% 40032 Minimum fan output 50.0 Fmax% 40033 Maximum fan output 100.0 50.0 100.0 Vmin% 40034 Minimum VAV output 50.0 Vmax% 40035 Maximum VAV output 100.0 50.0 100.0 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 26: Output Overdrives

    Signed 16 0...1000 0…10.00 V 30014 Heating regulation (connection Y4) Signed 16 0...1000 0…10.00 V 30021 Cooling regulation (connection A1) Signed 16 0...1000 0.00…10.00% 30022 Heating regulation (connection A2) Signed 16 0...1000 0.00…10.00% Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 27 40033 Maximum fan output Signed 16 500-1000 50.0 … 100.0% 1000 40034 Minimum VAV output Signed 16 0...500 0.0 … 50.0% 40035 Maximum VAV output Signed 16 500-1000 50.0 … 100.0% 1000 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 28: Service Alarm

    Main control interface First floor Local floor interface Gateway Modbus RTU (RS-485) FCRY 3 FCRY 3 FCRY 3 Ground floor Local floor interface Gateway Modbus RTU (RS-485) FCRY 3 FCRY 3 FCRY 3 Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 29: Modbus

    Note: If you try to enter a parameter value that exceeds the range for the parameter values, the value will be replaced with the nearest acceptable value. For example, if you enter 270 in register 40011, the value will be replaced with 260. 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 30 Not in use 0=OFF, 1=ON Sequence of heating stages 0=valve first, 1=VAV first ABC calibration 0=OFF, 1=ON CO2 measurement value display (toggling) 0=OFF, 1=ON Man in house button function 0=Temporary day mode 1=VAV boosting Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 31 2=speed 2 3=speed 3 4=automatic 30020 User set point deviation Signed 16 ±SP ±SP 30021 Cooling control (connector A1) Signed 16 0…1000 0.00…100.0% 30022 Heating control (connector A2) Signed 16 0…1000 0.00…100.0% 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 32 Signed 16 0 - 1 - 2 0=not used 1=T set point 2=T measurement 40028 Minimum of cooling actuator Signed 16 0…500 0.0…50.0% 40029 Maximum of cooling actuator Signed 16 500…1000 50.0…100.0% 1000 Swegon reserves the right to alter specifications. 08.08.2022...
  • Page 33 Low limit P-band for CO2 control Signed 16 400…1000 400…1000 ppm 40040 High limit P-band for CO2 control Signed 16 500…2000 500…2000 ppm 1250 40041 CO2 sensor adjustment (offset) Signed 16 -200…200 -200…200 ppm 08.08.2022 Swegon reserves the right to alter specifications.
  • Page 34: Contents Technical Data

    Casing: ABS plastic Dimensions: (w x h x d) 87 x 86 x 33 mm * Factory setting ** Note: When using supply voltage with direct current, only capacities 0…10 V work. Swegon reserves the right to alter specifications. 08.08.2022...

Table of Contents