Lutron HomeWorks QS Palladiom HVAC Solution

Features

HomeWorks QS Palladiom Thermostat

• Aesthetically coordinates with Palladiom keypads.
• Available in plastic, glass, and metal finishes.
• Backlit screen and buttons with Dynamic Backlight Management (DBM) for automatic adjustment based on ambient lighting.
• Supports separate heating and cooling equipment on one thermostat.
• Displays temperature in Fahrenheit or Celsius.
• Uses Lutron QS link for power and communication.
• Ships with a sealed wallbox for new or existing constructions.
• Compliant with IEC SELV/NEC Class 2 (24-36 V), IEC, CE, RoHS, cULus, and NOM standards.

HomeWorks QS Palladiom HVAC Controller

• Compatible with most residential HVAC systems.
• Utilizes standard control wiring and 24 V from HVAC equipment transformer or other power supply (12-24 V~, 50/60 Hz, 24 V===, +/- 10%, SELV).
• Supports an optional wired remote temperature sensor for flexible installation location.
• Continues operation if communication with the Palladiom thermostat is interrupted (requires wired temperature sensor).
• Compliant with cULus Listed, CE, NOM, RoHS, FCC15 Class B standards.

System

• System features are programmed in HomeWorks QS software.
• Supports 7-day programmable schedules, based on time of day or astronomic time.
• Local hold button overrides system HVAC schedules.
• Allows selection of alternate setpoints for energy savings during vacation.
• Supports up to 64 HVAC zones per system.
• Supports up to 4 Palladiom thermostats per zone (one master, three companion). Master thermostat connects directly to the HVAC controller.
• Supports up to 32 Palladiom thermostats per link.
• Thermostat continues operation if communication with the HomeWorks QS system is interrupted.
• Allows monitoring and control of thermostat settings via the Lutron Connect mobile device.
• Enables lockout of local button control via HomeWorks QS system configuration.
• Supports dynamic temperature averaging of up to 4 thermostat sensors and 4 remote HVAC controller sensors for zone control.
• Palladiom thermostat sensor temperature is available over Lutron integration protocol.

Model Numbers

• HomeWorks QS Palladiom thermostat: HQWT-T-HW-XXX*-A
• HomeWorks QS Palladiom HVAC controller: SMC55-RESI-2
• Wired flush mount sensor: LR-TEMP-FLSH

Compatibility

The HomeWorks QS Palladiom HVAC controller is compatible with residential HVAC systems including:

• Conventional forced air systems (gas, electric, or oil heat) with compressor-based cooling-only split systems or packaged units.
• Heat pumps with or without auxiliary heat.
• Fan coil units (connect controller's fan-speed outputs to a fan motor relay control board).
• Hydronic or electric underfloor heating.
• Specific VRV/VRF systems.
• Combinations of one heating and one cooling system (e.g., radiant floor heating and VRF cooling).

Typical System Configurations

Heat/Cool Stages (Relays)

• 1 heat/1 cool conventional (W₁, Y₁, G)
• 1 heat/1 cool heat pump (O/B, Y₁, G)
• 1 heat conventional (W₁)
• 1 cool conventional (Y₁, G)
• 2 heat/1 cool heat pump (2 stage compressor, no auxiliary heat) (O/B, Y1, Y2, G)
• 2 heat/1 cool heat pump (1 stage compressor + 1 auxiliary heat) (O/B, Y₁, Aux, G)
• 2 heat/2 cool conventional (W₁, Y1, Y2, W₂, G)
• 2 heat/1 cool conventional (W, Y, V₁, Y₁, W₂, G)
• 1 heat/2 cool conventional (W₁, Y₁, Y₂, G)
• 2 heat/2 cool heat pump (2 stage compressor, no auxiliary heat) (O/B, Y₁, Y₂, G)
• 3 heat/2 cool heat pump (2 stage compressor + 1 auxiliary heat) (O/B, Y₁, Y₂, Aux, G)
• 1 heat / no cool radiant hydronic or electric floor (relay) (W1)
• 1 heat / no cool radiant hydronic or electric floor (0 – 10 V proportional)

Fan Coil Units

• 2-pipe, On/Off valve, 3-speed fan with changeover sensor (valve, G₁, G2, G3)
• 2-pipe, On/Off valve, 0–10 V controlled fan with changeover sensor (valve, 0–10 V fan)
• 2-pipe, 0–10 V valve, 3-speed fan with changeover sensor (0–10 V valve, G₁, G2, G3)
• 2-pipe, 0-10 V valve, 0–10 V controlled fan with changeover sensor (0–10 V valve, 0–10 V fan)
• 4-pipe, On/Off valve, 3-speed fan (hot valve, cold valve, G1, G2, G3)
• 4-pipe, On/Off valve, 0-10 V controlled fan (hot valve, cold valve, 0–10 V fan)
• 4-pipe, 0-10 V valve, 3-speed fan (0–10 V hot valve, 0–10 V cold valve, G₁, G2, G3)
• 4-pipe, 0-10 V valve, 0–10 V controlled fan (0–10 V hot valve, 0–10 V cold valve, 0–10 V fan)

VRV/VRF Systems

The HomeWorks QS Palladiom thermostat can control VRV/VRF systems. Contact a Lutron representative for regional availability.

Daikin VRV Systems

Requires:

• HomeWorks QS Palladiom thermostat and CoolAutomation CoolPlug interface. See Application Note #650 at www.lutron.com. (Daikin indoor unit requires a P1/P2 connection.)
• HomeWorks QS Palladiom thermostat with HomeWorks QS processor and CoolAutomation CoolMasterNet interface. See Application Note #650 at www.lutron.com.

Mitsubishi VRF Systems

Requires:

• HomeWorks QS Palladiom thermostat and Mitsubishi Procon A1M interface. See Application Note #585 at www.lutron.com. (Mitsubishi indoor unit requires CN105 connection.)
• HomeWorks QS Palladiom thermostat with HomeWorks QS processor and CoolAutomation interface. See Application Note #650 at www.lutron.com.
• HomeWorks QS Palladiom thermostat with HomeWorks QS Palladiom HVAC controller and Mitsubishi thermostat controller interface. See Application Note #585 at www.lutron.com.

LG VRF Systems

Requires:

• HomeWorks QS Palladiom thermostat and LG PDRYCB500 interface. See Application Note #627 at www.lutron.com. (Contact LG engineering for compatible LG indoor units.)
• HomeWorks QS Palladiom thermostat with HomeWorks QS processor and CoolAutomation interface. See Application Note #650 at www.lutron.com.
• HomeWorks QS Palladiom thermostat with HomeWorks QS Palladiom HVAC controller and LG thermostat controller interface. See Application Note #627 at www.lutron.com.

Underfloor Heating Systems with Heatmiser Interface

Requires:

• HomeWorks QS Palladiom thermostat with HomeWorks QS processor and Heatmiser interface. See Heatmiser HVAC Integration with HomeWorks QS document.

Technical Specifications

HomeWorks QS Palladiom Thermostat

• Model Number: HQWT-T-HW-XXX*-A
• Regulatory Approvals: IEC, CE, cULus, RoHS, and NOM compliant.
• Operating Voltage: 24-36 V IEC SELV/NEC Class 2
• Typical Power Consumption: 10 mA at 24 V===
• Maximum Power Consumption: 60 mA at 24 V--- (Backlight on full)
• Environment: Ambient operating temperature: 32 °F to 104 °F (0 °C to 40 °C); 5% to 90% relative humidity (non-condensing). Indoor use only. IP20 Rating.
• Communications: Communicates via 4-wire QS link protocol and 3-wire HomeWorks QS Palladiom HVAC controller link.
• Room Temperature Sensor: Display range: 32 °F to 99 °F (0 °C to 37 °C); Setpoint range: 50 °F to 90 °F (10 °C to 32 °C). Accuracy: +/- 1 °F at 70 °F.
• Power Failure Memory: Retains all settings upon power restoration.
• Mounting: Mount on a clean, dry, interior wall approximately 4 ft to 5 ft (1.2 m to 1.5 m) above the floor.
• Wiring: IEC SELV/NEC Class 2: 24-36 V===; 22 AWG (0.5 mm²) and 18 AWG (0.75 mm²) solid wiring.
• Warranty: Valid if installed by a properly trained climate control specialist.

HomeWorks QS Palladiom HVAC Controller

• Model Number: SMC55-RESI-2
• Regulatory Approvals: cULus Listed, CE, NOM, RoHS, FCC15 Class B compliant.
• Operating Voltage: 12-24 V~ 50/60 Hz, 24 V===, +/- 10%, SELV
• Maximum Relay Rating: SPST(NO) 2 A at 24 V~/100 V~/120 V~/220-240 V~ (general purpose); 2 FLA/12 LRA at 100 V~/120 V~/220-240 V~ (motor load).
• Maximum Power Consumption: 4 W/6 VA
• Environment: Ambient operating temperature: -4 °F to 122 °F (-20 °C to 50 °C); 10% to 90% relative humidity (non-condensing). Indoor use only. IP20 Rating.
• Communications: Communicates with the HomeWorks QS Palladiom thermostat using a 3-wire Modbus protocol.
• Power Failure Memory: Retains system configuration settings upon power restoration.
• Mounting: Preferred for DIN rail mounting in a listed NEMA Type-1 or IP20 rated enclosure.
• Wiring: HomeWorks QS Palladiom HVAC Controller: LR-HVAC-WIRE-120 required wire harness (included). Wired Flush Mount Sensor: IEC SELV/PELV/NEC Class 2; 22 AWG (0.5 mm²) twisted, shielded pair wiring. Maximum wire length: 100 ft (30.5 m).
• Warranty: Valid if installed by a properly trained climate control specialist.

Dimensions

HomeWorks QS Palladiom Thermostat

Front View: 4.0 in (102 mm) width, 3.7 in (94 mm) height.

Side View: 1.0 in (25 mm) width, 0.4 in (10 mm) depth, 2.5 in (64 mm) height.

Rear View: 2.5 in (64 mm) width, 2.5 in (64 mm) height.

Wallboxes and Wallbox Adapters

Sealed Wallbox and Color Trim Ring (included): Used unless solid masonry or poured concrete walls are used.

EBB-1-SQ (sold separately) and Corresponding Wallbox Adapter: Square, metal wallbox for use with solid masonry or poured concrete walls. A pack of 15 wallboxes can be purchased via Lutron model number EBB-15-SQ.

• Wallbox Front View: 2.75 in (70 mm) width, 2.36 in (60 mm) height.
• Adapter Front View: 2.36 in (60 mm) width, 3.46 in (88 mm) height.
• Adapter Side View: Minimum 1.38 in (35 mm) depth, Maximum 0.125 in (3 mm) low-profile chase nipple.

HomeWorks QS Palladiom HVAC Controller

Front View: 2.75 in (70 mm) width, 3.4 in (87 mm) height.

Side View: 2.4 in (62 mm) depth, 0.2 in (5 mm) height.

Mounting

HomeWorks QS Palladiom Thermostat

• Mount on a clean, dry, interior wall.
• Mount approximately 4 ft to 5 ft (1.2 m to 1.5 m) above the floor.
• Mount on a wall without pipes, chimneys, or ducts.
• Mount on a wall with good visibility and control access.
• Do not mount on an exterior wall, near windows, doors, or areas with drafts.
• Do not mount in direct airflow from supply and return registers/grilles.
• Do not expose to water or mount in a damp area.
• Do not mount within 4 ft (1.2 m) of heating sources (e.g., direct sunlight, light bulbs).
• Do not mount in areas with poor circulation (e.g., niches, alcoves, behind curtains or doors).
• Do not mount within 0.75 in (19 mm) of Palladiom keypads.

Note: If guidelines cannot be followed, an indoor remote temperature sensor is recommended.

HomeWorks QS Palladiom HVAC Controller

Must be installed in a listed NEMA Type-1 or IP20 rated enclosure conforming to IEC 61439-3. Enclosure must meet minimum clearance requirements and be secured by a keyed or tooled locking mechanism. Metal enclosures are recommended for improved electromagnetic immunity. Preferred installation is DIN rail mounting (requires a 4 DIN wide location).

Acceptable DIN Rail Dimensions: 0.59 in (15 mm) width, 0.04 in (1 mm) height, 0.22 in (5.5 mm) depth, 1.38 in (35 mm) length, 0.06 in (1.5 mm) width, 0.28 in (7 mm) width, 0.04 in (1 mm) height, 0.06 in (1.5 mm) width.

Minimum Clearances: 0.8 in (20 mm) on all sides.

Wiring

QS Link

• Use IEC SELV/NEC Class 2 (24-36 V===) wiring for thermostat to QS link connection.
• Connect two 22 AWG (0.5 mm²) shielded, twisted pair wires to terminals 3 and 4. Connect shielding (drain) together, but not to earth/ground or the thermostat.
• Connect appropriate size wires to terminals 1 and 2 for power, based on link length.
• Connect Drain/Shield as shown; do not connect to Ground (Earth) or the thermostat.

QS Link Wire Sizes

• < 500 ft (153 m): Power: 1 pair 18 AWG (1.0 mm²); Data: 1 twisted, shielded pair 22 AWG (0.5 mm²).
• 500 ft to 2000 ft (153 m to 610 m): Power: 1 pair 12 AWG (4.0 mm²); Data: 1 twisted, shielded pair 22 AWG (0.5 mm²).

HomeWorks QS Palladiom HVAC Controller Link

• The controller comes with a 3-wire harness (LR-HVAC-WIRE-120).
• The 3-wire harness can be extended up to 500 ft (153 m) using one 18 AWG (1.0 mm²) and 1 pair 22 AWG (0.5 mm²) twisted, shielded wire.
• Do not connect the drain/shield wire to earth/ground or the thermostat.

HomeWorks QS Palladiom HVAC Controller Link Wire Sizes

• < 500 ft (153 m): Power (COM [G]): One 18 AWG (1.0 mm²); Data (MUX and MUX): One twisted, shielded pair 22 AWG (0.5 mm²).

Wiring Diagrams

Heat Pump Systems

• Diagram 1: 1 heat stage/1 cool stage heat pump (1 compressor stage, no auxiliary heat)
• Diagram 2: 2 heat stages/2 cool stages heat pump (2 compressor stages, no auxiliary heat)
• Diagram 3: 2 heat stages/1 cool stage heat pump (1 compressor stage, 1 auxiliary heat)
• Diagram 4: 3 heat stages/2 cool stages heat pump (2 compressor stages, 1 auxiliary heat)

Conventional Systems

• Diagram 5: 1 heat stage/1 cool stage system (1 transformer)
• Diagram 6: 1 heat stage/1 cool stage system (2 transformers)
• Diagram 7: Heat only system with no fan
• Diagram 8: Heat only system with fan
• Diagram 9: Cool only system
• Diagram 10: 2 heat stages/2 cool stages system (1 transformer)
• Diagram 11: 2 heat stages/2 cool stages system (2 transformers)

Fan Coil Units

2-pipe Systems

• Diagram 12: 2-pipe system, On/off valve, 3-speed fan, changeover sensor
• Diagram 13: 2-pipe system, On/off valve, 0–10 V controlled fan, changeover sensor
• Diagram 14: 2-pipe system, 0-10 V valve, 3-speed fan, changeover sensor
• Diagram 15: 2-pipe system, 0–10 V valve, 0–10 V controlled fan, changeover sensor

4-pipe Systems

• Diagram 16: 4-pipe system, On/off valve, 3-speed fan
• Diagram 17: 4-pipe system, On/off valve, 0–10 V controlled fan
• Diagram 18: 4-pipe system, 0-10 V valve, 3-speed fan
• Diagram 19: 4-pipe system, 0–10 V valve, 0–10 V controlled fan

Radiant Floor

• Diagram 20: On/off valve
• Diagram 21: 0-10 V valve

User Interface

The HomeWorks QS Palladiom thermostat features an intuitive user interface with controls for:

• Heating mode
• Cooling mode
• Fan mode (Low, Medium, High, Auto)
• System selection (Heat, Cool, Heat/Cool, Aux, Auto, Off)
• Schedule on/off control
• Heat setpoint adjustment
• Cool setpoint adjustment
• Local hold button
• Raise/Lower room setpoint
• Display backlighting with Dynamic Backlight Management (DBM)
• °F/°C indicator

Remote Temperature Sensor

If recommended mounting guidelines for the thermostat cannot be followed, an indoor remote temperature sensor (LR-TEMP-FLSH) is recommended for proper temperature control. The remote sensor must be enabled through advanced programming via the thermostat. A maximum of one remote temperature sensor can be used per HVAC Controller, which will disable the internal thermostat sensor.

• Wired Flush Mount Sensor: Flush mount on wall, field paintable.
• Wiring: Use 22 AWG (0.5 mm²) twisted, shielded pair wiring. Maximum wire length: 100 ft (30.5 m).
• Mounting: Mount on wall approximately 4 ft to 5 ft (1.2 m to 1.5 m) above the floor.

Colors and Finishes (thermostat)

Architectural Matte Finishes

• Almond (AL)
• Beige (BE)
• Black (BL)
• Brown (BR)
• Gray (GR)
• Ivory (IV)
• Light Almond (LA)
• Sienna (SI)
• Taupe (TP)
• White (WH)

Architectural Metal Finishes

• Antique Brass (QB)
• Bright Brass (BB)
• Bright Chrome (BC)
• Bright Nickel (BN)
• Polished Graphite (PG)
• Satin Brass (SB)
• Satin Chrome (SC)
• Satin Nickel (SN)

Glass Finish

• Clear Black Glass (CBL)
• Clear White Glass (CWH)

Note: Colors and finishes shown are for reference only and may not perfectly match actual product colors due to printing limitations. Color chip keychains are available for precise color matching.