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Application Note #627
Revision B
March 2017
LG VRF – Lutron Palladiom Thermostat Integration
Overview
Lutron Electronics and LG, a leading supplier of Variable Refrigerant Flow (VRF) technology, have integrated a sleek, intuitive design of the Palladiom Thermostat for control of LG Systems. This integration is achieved by using a Palladiom
Thermostat, a Lutron Fan Coil Unit (FCU) Controller (myRoom) or Palladiom HVAC Controller (HomeWorks QS), and the
LG Dry Contact Closure interface. This integration is available for Lutron projects in the United States. 1
System Topology
The System includes a Palladiom Thermostat with the FCU Controller (Model SMC550050407) or Palladiom HVAC
Controller (SMC55-RESI) connected to the LG Dry Contact interface (Model PDRYCB300).
Thermostat Link
To LG Indoor Unit
QS Link to Lutron System Contact Closures
1 LG offers multiple other dry contact closure interfaces in International regions. The Lutron Palladiom Thermostat has not been tested to work with these interfaces. Please contact LG for further information regarding compatibility.
1 Customer Assistance — 1.844.LUTRON1
Wiring Diagrams
3-Speed Fan
Heat and Cool
Application Note #627
Power Supply
Common
Power Supply
12-24 V~ / 24 V-
Supply
Supply
5V
12V
AO2
DO6
AO1
GND
DI6
GND
DI5
AI5
DI4
AI4
DI3
AI3
DI2
AI2
DI1
AI1
5
AO
3 G 4
Fan Coil Unit Controller
SMC5500050407 or
Palladiom HVAC Controller
SMC55-RESI
LAN
DO6 DO1 DO2 DO3 N DO4
G + –
RS485
12 11 10 9 8 7 6 5
Slide to “VOLT”
Note: Do not input voltage signal in “NON
VOLT” setting mode, otherwise it will cause serious damage.
RESET_SW
CN_TherOper CN_MODE
CHANGEOVER_SW
CN_WIND
SETTING_SW
DISPLAY_LED
TEMP_SW
CN_OUT
Rotate to “1”
Rotate to “F”
2 www.lutron.com/help
Application Note #627
Wiring Diagrams (continued)
3-Speed Fan
Heat Only
Power Supply
Common
Power Supply
12-24 V~ / 24 V-
Supply
Supply
5V
12V AO2
DO6
AO1
GND GND
DI6 DI5
AI5
DI4
AI4
DI3
AI3
DI2
AI2
DI1
AI1
5
AO
3 G 4
Fan Coil Unit Controller
SMC5500050407 or
Palladiom HVAC Controller
SMC55-RESI
LAN
DO6 DO1 DO2 DO3 N
12 11 10 9 8 7 6 5
DO4
G + –
RS485
Slide to “VOLT”
Note: Do not input voltage signal in “NON
VOLT” setting mode, otherwise it will cause serious damage.
RESET_SW
CN_TherOper CN_MODE
CHANGEOVER_SW
CN_WIND
SETTING_SW
DISPLAY_LED
TEMP_SW
CN_OUT
Rotate to “1”
Rotate to “F”
3 Customer Assistance — 1.844.LUTRON1
Application Note #627
Wiring Diagrams (continued)
3-Speed Fan
Cool Only
Power Supply
Common
Power Supply
12-24 V~ / 24 V-
Supply
Supply
5V
12V
AO2
DO6
AO1
GND
DI6
GND
DI5
AI5
DI4
AI4
DI3
AI3
DI2
AI2
DI1
AI1
5
AO
3 G 4
Fan Coil Unit Controller
SMC5500050407 or
Palladiom HVAC Controller
SMC55-RESI
LAN
DO6 DO1 DO2 DO3 N DO4
G + –
RS485
12 11 10 9 8 7 6 5
Slide to “VOLT”
CN_TherOper CN_MODE
CN_WIND
CHANGEOVER_SW
Rotate to “1”
RESET_SW
SETTING_SW
DISPLAY_LED
Rotate to “F”
Note: Do not input voltage signal in “NON
VOLT” setting mode, otherwise it will cause serious damage.
TEMP_SW
CN_OUT
Design Considerations
• In heat only or cool only applications, the FCU controller and Palladiom HVAC controller must be configured for heating only or cooling only.
• The Palladiom HVAC controller must be configured to control FCUs.
• The PDRYCB300 interface should be supplied by your local LG distributor.
• The FCU controller must be part number SMC5500050407 from Lutron.
• The Palladiom HVAC controller must be part number SMC55-RESI from Lutron.
• Use one PDRYCB300 interface per indoor unit controlled by the Palladiom Thermostat.
• Power supply is required and field supplied by others.
• Use 18 AWG (1.0 mm 2 ) wire between PDRYCB300 and Lutron controller, maximum 500 ft (152 m).
• Lutron myRoom systems and Palladiom Thermostat must be programmed by a trained Lutron service engineer or an authorized distributor.
• Lutron HomeWorks QS systems and Palladiom Thermostat must be programmed by a qualified system programmer.
• A trained LG HVAC professional may change the PDRYCB300 configurations based on user preference.
4 www.lutron.com/help
Application Note #627
Lutron, HomeWorks, and Palladiom are trademarks of Lutron Electronics Co., Inc., registered in the U.S. and other countries.
myRoom is a trademark of Lutron Electronics Co., Inc.
LG is a registered trademark of LG Electronics Inc.
Lutron Contact Numbers
WORLD HEADQUARTERS
USA
Lutron Electronics Co., Inc.
7200 Suter Road
Coopersburg, PA 18036-1299
TEL: +1.610.282.3800
FAX: +1.610.282.1243
www.lutron.com/help
EUROPEAN HEADQUARTERS
United Kingdom
Lutron EA Ltd.
6 Sovereign Close
London, E1W 3JF United Kingdom
TEL: +44.(0)20.7702.0657
FAX: +44.(0)20.7480.6899
FREEPHONE (UK): 0800.282.107
Technical Support: +44.(0)20.7680.4481
ASIAN HEADQUARTERS
Singapore
Lutron GL Ltd.
390 Havelock Road
#07-04 King’s Centre
Singapore 169662
TEL: +65.6220.4666
FAX: +65.6220.4333
Technical Support: 800.120.4491
North & South America
Customer Assistance
USA, Canada, Caribbean:
1.844.LUTRON1 (1.844.588.7661)
Mexico:
+1.888.235.2910
Central/South America:
+1.610.282.6701
Asia Technical Hotlines
Northern China: 10.800.712.1536
Southern China: 10.800.120.1536
Hong Kong: 800.901.849
Indonesia: 001.803.011.3994
Japan: +81.3.5575.8411
Macau: 0800.401
Taiwan: 00.801.137.737
Thailand: 001.800.120.665853
Other Countries: +65.6220.4666
5
Lutron Electronics Co., Inc.
7200 Suter Road
Coopersburg, PA 18036-1299 U.S.A.
P/N 048627 Rev. B 03/2017
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