A2L Accessory / Zoning Control Kit Installation Instructions

Attention Installing Personnel

As a professional installer, you have an obligation to know the product better than the customer. This includes all safety precautions and related items. Prior to installation, thoroughly familiarize yourself with this manual, paying special attention to all safety warnings. It is your responsibility to install the product safely and to be able to instruct the customer in its safe use. Safety is a matter of common sense and thinking before acting.

The precautions in this manual are supplemental to existing practices. If there is a conflict, the precautions in this manual take precedence.

Safety Precautions

The following symbols and labels indicate immediate or potential safety hazards. It is the owner's and installer's responsibility to read and comply with all safety information. Failure to heed safety information increases the risk of personal injury, property damage, and/or product damage.

⚠ HIGH VOLTAGE

WARNING: DISCONNECT ALL POWER BEFORE SERVICING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

If the installation check does not pass successfully, please call 1-855 DAIKIN1, option 3.

⚠ General Warnings

• WARNING: DO NOT BYPASS SAFETY DEVICES.
• Only personnel trained to install, adjust, service, maintain, or repair the equipment should do so.
• This equipment is not intended for use by persons with reduced physical, sensory, or mental capacities, or lack of experience and knowledge, unless supervised or instructed by a responsible person.
• Children should be supervised to ensure they do not play with the equipment.
• The manufacturer is not responsible for injury or property damage arising from improper supervision, service, or service procedures.

Parts Included in Kit

• 10ft RED 18 AWG wire with insulated ¼" terminals on each side (for Alarm terminal to HVAC unit)
• 10ft BLUE 18 AWG wire with insulated ¼" terminal on one end and cut on the other (for transformer common to HVAC unit)
• 4 x 10ft BLACK 18 AWG wire with insulated ¼" terminal on one end and cut on the other (for power wiring to accessory and accessory power)
• 4 x 10ft WHITE 18 AWG wire with insulated ¼" terminal on one end and cut on the other (for neutral or common wiring to accessory and accessory power)
• Mounting hardware (screws & wall anchors)
• PCB Enclosure with Zoning PCB

Product Overview

The A2L Accessory / Zoning Control Kit is designed for R-32 refrigerant HVAC installations utilizing electronic accessories such as zoning systems, electronic air cleaners, UV lamps, humidifiers, or dehumidifiers. It requires a refrigerant detection system to be present in the installation. In the event of an R-32 refrigerant leak, the system's refrigerant detection system will shut down all HVAC functionality (cooling and heating) and run the indoor blower to dissipate the gas. The A2L Accessory / Zoning Control, in conjunction with the leak detection system, ensures all zone dampers open and any installed accessory is turned off during an active leak alarm. Once the leak alarm is cleared, the control restores power to accessories and releases damper positions.

Mounting Instructions

The kit should not be physically mounted on the HVAC unit. It can be mounted to a wall near the unit, on a wood beam, or on the furnace return duct. Use the provided wall anchors and screws. The kit must always be accessible and serviceable.

Wiring Diagrams

Various wiring diagrams are provided to illustrate different application scenarios, including:

• Applications using Power Open / Power Closed Zone Dampers.
• Applications using Power Closed / Spring Open Zone Dampers.
• Applications using Power Open / Spring Closed Zone Dampers.
• Configurations for systems with more than 3 zones or 2 accessories, showing examples with 4 zones.
• Integration examples with Non-A2L Furnace Integration Kits.
• Specific application examples for DFVE, AHVE, or MBVK models, detailing connections for Zoning Control, 24VAC Accessory Application, and 120VAC Accessory Application.

These diagrams detail connections between the A2L Accessory / Zoning Control, HVAC System Control Board, Zone Dampers, Accessories (1 and 2), power sources, and zone control boards. Key terminals include ZONE-1-OUT, ZONE-1-IN, ACCESSORY 1, ACCESSORY 2, ZONE POWER, ALARM, and TRANSFORMER COMMON. LED indicators (DS1, DS2, DS3, DS4) are present to show Zone board power, Alarm status, and Accessory power status.

Installation Steps

Zoning Applications

1. Identify the type of zoning control system used (power open/spring closed, power closed/spring open, or power open/power closed dampers). The A2L Accessory / Zoning Control is compatible with all types.
2. Locate the appropriate wiring diagram for the damper type.
3. Identify damper connection points on the zone control. If the zoning control was previously installed, dampers are likely already wired; if new, this step is not needed.
4. If an existing zone control is present, move damper wires from it to the A2L Accessory / Zoning Control terminals labeled "CONNECT DAMPER WIRES TO THIS SIDE". Ensure zone 1 wires go to zone 1, zone 2 to zone 2, and zone 3 to zone 3.
5. Following the identified wiring diagram, connect zone control wires to the A2L Accessory / Zoning Control terminals labeled "CONNECT ZONE DAMPER WIRES FROM ZONE CONTROL TO THIS SIDE". Ensure zone matching.
6. For new zone system installations, connect zone dampers directly to the A2L Accessory / Zoning Control terminals labeled "CONNECT DAMPER WIRES TO THIS SIDE", ensuring correct zone connections.
7. Locate the HVAC unit's refrigerant detection system, which has an ALARM or CTL-NO terminal (¼" size). Run a wire from this terminal to the ALARM terminal on the A2L Accessory / Zoning Control (a red wire is provided).
8. If the detection system terminal was marked ALARM, run an additional wire from the A2L Accessory / Zoning Control's "TRANSFORMER COMMON FROM HVAC UNIT" terminal to any common point inside the HVAC unit (a blue wire is provided). Note: This connection is to the HVAC system transformer, not the zoning control transformer. If the terminal was marked CTL-NO, refer to specific diagrams for CTL-COM and CTL-NO connections, using provided wire if necessary.
9. Locate the main 24VAC transformer power input to the Zone control, which should originate from a separate zone transformer.
10. Connect two wires from the zone control's 24VAC power input terminal to the A2L Accessory / Zoning Control terminals marked "ZONE POWER, ZONE-C, ZONE-R".

Zone Application Test

RUNNING THE SYSTEM TEST IS MANDATORY FOR ALL INSTALLATIONS.

1. Apply power to the HVAC system. A green LED near the Zone Power terminals should illuminate, indicating zone transformer power.
2. Confirm all zone dampers are closed. If a zone control defaults dampers to OPEN when idle, induce a fan, cooling, or heating call for a single zone to test its open/closed state, leaving other zones inactive. This ensures the calling zone remains open while others close.
3. Disconnect power, locate the R-32 sensor cable, and the refrigerant leak detection system control board it connects to.

Accessory Application

The A2L Accessory / Zoning Control is designed to remove main power from an accessory during a refrigerant leak event. Accessory control wires (e.g., from thermostats, humidistats) should be wired separately. The kit supports up to two accessories; additional controls are needed for more.

Wiring for Accessory Application

1. Connect the accessory device's two power wires to the A2L Accessory / Zoning Control terminals labeled "CONNECT ACCESSORY TO THIS SIDE" (use provided White/Black wires). Terminals are marked ACCESSORY 1 and ACCESSORY 2.
2. Connect the accessory's main power source wires to the A2L Accessory / Zoning Control terminals labeled "CONNECT ACCESSORY POWER" (use provided White/Black wires). Terminals are marked ACCESSORY 1 and ACCESSORY 2. Power can be 120VAC or 24VAC.
3. Locate the HVAC unit's refrigerant detection system (ALARM or CTL-NO terminal). Run a wire from this terminal to the A2L ALARM terminal (red wire provided).
4. If the detection system terminal was marked ALARM, run an additional wire from the A2L Accessory / Zoning Control's "TRANSFORMER COMMON FROM HVAC SYSTEM" terminal to any common point inside the HVAC unit (blue wire provided). If the terminal was marked CTL-NO, refer to specific wiring diagrams for CTL-COM and CTL-NO connections, noting different methods for 24VAC and 120VAC accessory power sources.

Accessory Application Test

RUNNING THE SYSTEM TEST IS MANDATORY FOR ALL INSTALLATIONS.

1. Apply power to the HVAC system and accessory devices. Confirm accessories are powered.
2. Green LEDs next to Accessory 1 and Accessory 2 terminals should be ON if an accessory is installed and powered.
3. Disconnect power, locate the R-32 sensor cable and the refrigerant leak detection system control board.

Final Steps and Testing

• The control board is typically mounted inside an air handler, furnace, or modular blower, or in a kit mounted outside the unit.
• After locating the board, disconnect the R-32 Sensor from the refrigerant leak detection system control board. Reassemble the HVAC unit and reconnect power. This energizes the Alarm or CTL-NO terminal within 30 seconds.
• Confirm the red LED next to the ¼" ALARM terminal on the A2L Accessory / Zoning Control is ON, indicating proper HVAC system wiring. The green LED (Zone transformer power) should also remain on.
• Confirm all zone dampers are fully open. Disconnect power, then reconnect the R-32 sensor. Reassemble the unit and reconnect power. The Red LED on the A2L Accessory / Zoning Control should turn OFF, and zone dampers should return to their original state.
• This completes the zoning test.
• For accessory testing: Confirm accessory devices are powered. Green LEDs next to Accessory 1/2 terminals should be ON. Disconnect power, locate R-32 sensor cable and control board. Reconnect R-32 sensor, reassemble, and reconnect power. The Red LED should turn OFF, and accessories should return to their original state. Confirm accessories have turned back on. This completes the accessory test.

Multiple Control Systems

Applications requiring more than 3 zones or 2 accessories will need a second A2L Accessory / Zoning Control. Jump the Alarm and HVAC Common terminals to the second control and wire zone dampers/accessories as shown in the diagrams. Ensure power from the zoning transformer is also applied to the second control. All test steps apply to systems using multiple controls.

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