Related Manuals for Samsung MXD-U000XN
Summary of Contents for Samsung MXD-U000XN
- Page 1 AHU Control Unit (ACU) Installation manual MXD-U000XN • Before operating this unit, please read this manual carefully and retain it for future reference.
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Page 2: Table Of Contents
Contents Contents Safety Information Before Installation Functions of the AHU Control Unit (ACU) Structure Diagram of the AHU Control Unit (ACU) Installation Accessories External appearance External dimensions Circuit diagram Installation Wiring Diagram Option settings Appendix Troubleshooting 2 English... -
Page 3: Safety Information
Safety Information CAUTION California Proposition 65 Warning (US) Do not install the product where there’s combustible gas. Cancer and Reproductive Harm - WARNING : • Potential risk of fire and explosion. www.P65Warnings.ca.gov. Do not install the product in areas exposed to oil or vapor. This installation manual explains how to install a AHU Control •... - Page 4 Safety Information Section 15.105 Information to the user. (a) For a Class A digital device or peripheral, the instructions furnished the user shall include the following or similar statement, placed in a prominent location in the text of the manual: NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
- Page 5 Refrigeration Institute). Performance registered in ICM (Independent Coil Manufacturers) can be guaranteed fully by members of ICM. Partial system changes or performance changes are not provided by SAMSUNG or members of ICM. Refer to the table below for information regarding compatibility.
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Page 6: Before Installation
Before Installation Functions of the AHU Control Unit (ACU) • The AHU Control Unit (ACU) controls the system based on input signals from a 24VAC thermostat. • The AHU Control Unit (ACU) provides 24 VAC output signals for the thermostat to the third-party indoor unit. See page 8 for the circuit diagram for the AHU Control Unit (ACU). -
Page 7: Installation
Installation Accessories External appearance AHU Control Unit (ACU) Cable tie (2) M4x16 screw (4) U-ring (20) Fan speed control wire (1) Holder lock (4) Installation manual (1) Wire label (1) Parts and components Front cover (Case-top) Rear cover (Case-bottom) Magnet English... -
Page 8: External Dimensions
Installation External dimensions [Unit: inch (mm)] 8.81 (223.8) Circuit diagram FAN SPEED CONTROL INDOOR FAN 3 STEP AHU Control Unit (ACU) Reserved INDOOR FAN 2 STEP INDOOR FAN 1 STEP Reset THERMOSTAT AHU/INDOOR 8 English... -
Page 9: Installation
Installation CAUTION • The AHU Control Unit (ACU) should be installed by a qualified person, according to the relevant local wiring regulations and this installation manual. • Turn off the power before connecting the terminals. • Install wires according to the relevant electrical wiring regulations. Ensure that the wires are installed inside the indoor unit or on a wall near the indoor unit, to prevent access by users. - Page 10 Installation The magnets attached to the rear cover can be used to fix the device to the indoor unit. If the device cannot be fixed properly with the magnets, use the supplied screws to fix to the unit or a nearby structure. •...
- Page 11 Connect the wires to the corresponding terminal blocks. For wiring instructions, refer to wiring diagrams on page 13 to 24. G3 (RED) G2 (BLU) Fan speed (step) control G1 (YEL) Output Input Name Description Outdoor unit communication Outdoor unit communication Reserved Reserved Compressor Stage 1...
- Page 12 Installation Set the DIP switches to fit the application requirements. Scan the QR code attached to the front cover of the AHU Use your Control Unit (ACU) using a smartphone camera to use an smartphone camera on-line system configuration wizard. For further information to scan the QR code.
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Page 13: Wiring Diagram
After connecting the terminals, organize the wires properly to prevent overheating, electric shock or fire. • Make sure that only 24 VAC is connected to the terminal blocks of the AHU Control Unit (ACU). Samsung is not responsible for any accident resulting from use of power that is not 24 VAC. - Page 14 Installation AHU with Heat Pump Configuration • 2 Stage Thermostat, 2 Stage AHU AHU Control Unit (ACU) • Thermostat Indoor unit Input Output • Connection of the dehumidification (D) terminal is optional. If the thermostat and the AHU/furnace supports a dehumidification signal, the outdoor unit and AHU Control Unit (ACU) will adjust operation to optimize dehumidification.
- Page 15 AHU with Heat Pump Configuration (continued) • 2 Stage Thermostat, 1 Stage AHU AHU Control Unit (ACU) • Thermostat Indoor unit Input Output • • DIP SW1 AHU with Cooling-only Configuration • 2 Stage Thermostat, 2 Stage AHU AHU Control Unit (ACU) •...
- Page 16 Installation AHU with Cooling-only Configuration (continued) • 1 Stage Thermostat, 1 Stage AHU AHU Control Unit (ACU) • Thermostat Indoor unit Input Output • • • • DIP SW1 • Please review the Option Settings section for 2 Stage Thermostat, 1 Stage AHU additional system option settings.
- Page 17 AHU + Electric Heat with Heat Pump Configuration • 2 Stage Thermostat, 2 Stage AHU AHU Control Unit (ACU) • Thermostat Indoor unit Input Output NOTE • • DIP SW1 • 1 Stage Thermostat, 1 Stage AHU • AHU Control Unit (ACU) Thermostat Indoor unit Input...
- Page 18 Installation AHU + Electric Heat with Heat Pump Configuration (continued) 2 Stage Thermostat, 1 Stage AHU • Please review the Option Settings section for additional system option settings. AHU Control Unit (ACU) Thermostat Indoor unit • If an auxiliary heater is installed and the heater Input Output can operate simultaneously with the heat-pump,...
- Page 19 AHU + Electric Heat (emergency heat) with Heat Pump Configuration (continued) 1 Stage Thermostat, 1 Stage AHU • AHU Control Unit (ACU) Thermostat Indoor unit • Input Output • • • DIP SW1 2 Stage Thermostat, 1 Stage AHU • AHU Control Unit (ACU) Thermostat Indoor unit...
- Page 20 Installation AHU + Electric Heat with Cooling-only Configuration 2 Stage Thermostat, 2 Stage AHU • AHU Control Unit (ACU) Thermostat Indoor unit • Input Output • DIP SW1 1 Stage Thermostat, 1 Stage AHU • AHU Control Unit (ACU) Thermostat Indoor unit •...
- Page 21 AHU + Electric Heat with Cooling-only Configuration (continued) 2 Stage Thermostat, 1 Stage AHU • Please review the Option Settings section for additional system option settings. AHU Control Unit (ACU) Thermostat Indoor unit • If the system is used as cooling-only with auxiliary Input Output heater, configure the thermostat as a 2 stage...
- Page 22 Installation A-Coil + Furnace with Heat Pump Configuration (continued) 1 Stage Thermostat, 1 Stage Furnace • AHU Control Unit (ACU) Thermostat Indoor unit • Input Output • • • DIP SW1 2 Stage Thermostat, 1 Stage Furnace • AHU Control Unit (ACU) Thermostat Indoor unit •...
- Page 23 A-Coil + Furnace with Cooling-only Configuration 2 Stage Thermostat, 2 Stage Furnace • AHU Control Unit (ACU) Thermostat Indoor unit • Input Output • • DIP SW1 1 Stage Thermostat, 1 Stage Furnace • AHU Control Unit (ACU) Thermostat Indoor unit •...
- Page 24 Installation A-Coil + Furnace with Cooling-only Configuration (continued) 2 Stage Thermostat, 1 Stage Furnace • AHU Control Unit (ACU) Thermostat Indoor unit • Input Output • • • DIP SW1 24 English...
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Page 25: Option Settings
Option settings Thermostat settings • Heat pump stage: It is recommended that a 2-stage thermostat be used with this device. • O/B Reversing valve: energized on heat, Configure as B at thermostat. • Minimum compressor downtime: 180 seconds or more •... - Page 26 Installation Option settings 1 ~ 8 9 ~ 16 17 ~ 24 9 10 K1 (Reset) 17 18 SW1-1 System Furnace with A-coil (dual fuel or cooling only) Air handling unit (Default) SW1-2 No auxiliary heat / furnace (default) SW1-3 Auxiliary heat Emergency heat (Default) SW1-4 to 1-8...
- Page 27 Option settings 1 ~ 8 9 ~ 16 17 ~ 24 9 10 K1 (Reset) 17 18 SW2-13 Reserved SW2-14 Disable Enable (Default) SW2-15 ~ 2-16 Reserved SW3-17 ~ 3-18 Reserved SW3-19 SW3-20 15 seconds 10 seconds 5 seconds 0 seconds (Default) SW3-21 SW3-22 90 seconds...
- Page 28 Installation Option setting details NOTE • After changing DIP SW setting, reset power supply or press the K1 (Reset) button, to update the changes. Options Option setting details 1) Auxiliary heater installed • For heat pump applications, if an auxiliary heater is installed, set SW1-2 to On. for heat pump If SW1-2 is set to Off, the W1 and W2 input/output terminals on the AHU Control Unit (ACU) are disabled.
- Page 29 Options Option setting details 4) 3 step fan speed control for • This can only be turned on when a 2-stage thermostat is used. 2 stage thermostats • The fan speed control logic is as follows: (Y1 and Y2 connection) –...
- Page 30 Installation Options Option setting details 7) Enhanced dehumidification • Improves dehumidification by improving the cooling performance while control dehumidification signals from the thermostat are received. • When this feature is set to Enable, the thermostat may turn off or on frequently. SW2-14 •...
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Page 31: Appendix
Troubleshooting Refer to the outdoor unit installation manual for information regarding troubleshooting. English...