NON-A2L Furnace Integration Kit

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Product Information

Specifications:

• Product Name: Non-A2L Furnace Integration Kit

• Model Number: IO-7021B

• Compatibility: Designed for HVAC systems containing a Furnace,
  Indoor Coil, and Outdoor Air Conditioner or Heat Pump unit, or a
  Modular Blower, Indoor Coil, and Outdoor Air Conditioner or Heat
  Pump unit

• Refrigerant: R-32 compatible

• Function: Refrigerant leak detection system

Product Usage Instructions:

Installation:

1. Before installation, carefully read and understand the
   instruction manual.

2. Ensure you have all the items needed in the kit as listed in
   the manual.

3. If an installation check fails, contact 1-855 DAIKIN1 for
   assistance.

4. If the furnace or modular blower needs replacement, ensure it
   is R-32 compatible.

5. The Non-A2L Furnace Integration Kit should be installed
   externally to the cased coil and furnace.

Mitigation Function:

The kit relies on existing functions of the installed furnace or
modular blower control boards for necessary mitigation functions
using R-32 refrigerant. Verify the Mitigation section in the manual
for details.

Refrigerant Leakage Detection:

When connected with an R-32 gas sensor, the kit acts as a
refrigerant leak detection system. Ensure proper installation of
the sensor as instructed.

FAQ:

Q: What should I do if the installation check fails?

A: If the installation check fails and cannot be resolved by
following the instructions, contact service for further assistance.
If necessary, replace the furnace or modular blower with an R-32
compatible unit.

Q: Where should the Non-A2L Furnace Integration Kit be

mounted?

A: The kit should be installed externally to the cased coil and
furnace. Do not mount it on the cased coil or furnace directly.

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NON-A2L FURNACE INTEGRATION KIT

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 the actual installation, thoroughly familiarize yourself with this instruction manual. Pay special attention to all safety warnings. Often during installation or repair, it is possible to place yourself in a position which is more hazardous than when the unit is in operation. Remember, it is your responsibility to install the product safely and to know it well enough to be able to instruct a customer in its safe use.
Safety is a matter of common sense. A matter of thinking
safety practices. Follow them.
The precautions listed in this installation manual are intended as supplemental to existing practices. However,
the content of this manual, the precautions listed here take precedence.

WARNING WARNING

The following symbols and labels are used throughout this

manual to indicate immediate or potential safety hazards.

It is the owner’s and installer’s responsibility to read

and comply with all safety information and instructions

accompanying these symbols. Failure to heed safety

information increases the risk of personal injury, property

damage, and/or product damage.

Items needed in kit:

Qty

IO Manual

1

WARNING

1

Connector Pin 1

1

HIGH VOLTAGE

Connector Pin 2

1

Connector Pin 3

1

Mounting hardware (screws)

4

Mounting hardware (wall anchors)

4

If the installation check, as detailed in these installation instructions, does not pass successfully and cannot be resolved by calling 1-855 DAIKIN1, option 3 for further assistance, the installer must replace the furnace or modular blower with an R-32 compatible furnace or
modular blower.

IO-7021B 03/2024

19001 Kermier Rd., Waller, TX 77484 wwww.daikincomfort.com · www.goodmanmfg.com · www.amana-hac.com
© 2024 Daikin Comfort Technologies Manufacturing, L.P.
is a registered trademark of Maytag Corporation or its related companies and is used under license. All rights reserved.

The Non-A2L Furnace Integration Kit was designed to support the HVAC replacement market for systems containing 1) a Furnace, Indoor Coil and Outdoor Air Conditioner or Heat Pump unit or 2) a Modular Blower, Indoor Coil and Outdoor Air Conditioner or Heat Pump unit. If either the indoor coil or outdoor unit needs to be replaced, both must be upgraded to R-32 models. If the furnace or modular Blower is still operational, it does not need to be replaced.
NOTE: If the installation check, as detailed in these installation instructions, does not pass successfully and cannot be resolved by calling service for further assistance, the installer must replace the furnace or modular blower with an R-32 compatible furnace or modular blower.

The Non-A2L Furnace Integration Kit relies on existing functions of the currently installed furnace or modular blower control boards or PCBs to achieve the necessary mitigation function required for a system utilizing R-32 refrigerant. Therefore, it is important to verify the function
Mitigation” section of this manual.
NOTE: a refrigerant leakage detection system to be installed. The Non-A2L Furnace Integration Kit, when connected with an R-32 gas sensor, is a refrigerant leak detection system. The Non-A2L Furnace Integration Kit is designed to be installed externally to the cased coil and furnace. It should never be physically mounted anywhere on the cased coil or

RED LED

PUSH BUTTON

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the furnace. The kit can be mounted to a wall near the unit, on a wood beam, on the furnace return duct or other locations deemed acceptable. The kit can be mounted using the wall anchors and screws provided with the kit. The kit must always be accessible and serviceable. This manual will explain how to wire and test a new installation where the original furnace or modular blower remains installed while the indoor coil and outdoor unit are replaced with R-32 models.
NON-A2L FURNACE INTEGRATION KIT
NON-A2L FURNACE INTEGRATION KIT is designed to read R-32 sensor concentration and utilize existing function of indoor PCBs to mitigate R-32 leakage in an unlikely event of a leak in the system. The integration kit continuously monitors the system for R-32 leaks and does not impact the normal operation of the unit when no leak/sensor fault is detected.
kit is described here. For a more in-depth understanding of the integration kit’s operating principle, please contact technical service.
Unit (Green) and Thermostat (Black). The integration kit is connected between the thermostat and indoor unit, and it

modular blower does not conform to these common operating principles, please contact technical service to identify a compatible thermostat and/or furnace or modular blower. Do not install R-32 coil and/or outdoor unit if the thermostat or the furnace of modular blower is not compatible.
R signal of the thermostat is the source of Y1/Y2, W1/W2, G and other signals. Please verify this by disconnecting the R
then the thermostat is compatible. If the thermostat is still powered on (by alternate power source or battery), lower and increase the thermostat setpoint to activate COOLING and HEATING call, respectively to the indoor unit. In either case, the indoor unit and outdoor unit shall not operate in COOLING or HEATING mode, respectively.
Noncommunicating indoor units must activate blower fan within 15 seconds, when a G call is presented
putting the system in FAN ONLY mode. The blower shall activate within 15 seconds after the thermostat provides 24VAC on the G terminal.
Communicating indoor units must prioritize 24VAC calls, over ClimateTalk® communication and activate blower fan within 15 seconds, when a G call is presented over 24VAC signal. This is true for all ComfortNet systems. However, ComfortBridge systems, may require a

indoor unit, based on the R-32 concentration. 1. R-32 Concentration detection: The integration kit is
connected to a refrigerant sensor, which detects R-32 concentration. The sensor transmits the concentration, and the integration kit acts based on the concentration. 2. When R-32 concentration is at safe level, the integration kit, does not interfere between the thermostat and indoor unit. All signals are passedthrough. 3. When R-32 concentration is above a certain level or the R-32 sensor or the integration kit encounters a fault, the integration kit, energizes the G (fan) terminal in the indoor unit by sending a 24VAC signal. It also disconnects the R signal to the thermostat and/or, disconnects ClimateTalk® communication, as applicable. This action will terminate all HVAC operation (Cooling or Heating) while keeping the main blower on to dissipate any refrigerant gas.
NON-A2L FURNACE INTEGRATION KIT
The NON-A2L FURNACE INTEGRATION KIT works successfully if the following are true for the thermostat and furnace or modular blower. While these conditions are true for most thermostats and furnace or modular blower, please consult the user manual of the thermostat and furnace or modular blower to verify. If the thermostat or furnace or

installed in ComfortBridge system, via CoolCloud app (version available for download on your mobile device).

5. Identify thermostat wires in the indoor unit and note it down. It will greatly help to identify the wires later.

Indoor Unit Terminal

Color of the Color of Color of the

Wire from the Wire to Wire to EEV

Thermostat Outdoor Unit

Unit

R

C

G

Y1

Y2

W1

W2

DH

O

1

2

unit terminals can be illuminated hands-free. It is also unit terminals.

ClimateTalk is a trademark of Emerson Electric Co. 3

A copy of the wiring diagram of the existing indoor unit, to identify the indoor unit terminals (R, Y1/2, W1/2, C, 1, 2 etc) as applicable.
A picture of the existing installation and wiring, before disconnecting the wires.
NON-A2L FURNACE INTEGRATION KIT

c. ComfortBridge Non-Communicating System (Indoor unit contains a ComfortBridge control but the outdoor unit is wired as a non-communicating system meaning standard thermostat inputs such as Y and W are used. In this case, the indoor unit ComfortBridge control contains terminals labeled 1 and 2, but they are not in use).

During installation of the kit: 1. Disconnect wires coming from thermostat and outdoor
unit to indoor unit. 2. Connect appropriate wires from thermostat to the
integration kit’s “Thermostat” terminals. 3. Use new wires to connect the integration kit’s “Indoor
Unit” terminals to the indoor. 4. If applicable, disconnect 4 wires for EEV coil from
Unit” terminal per the wiring diagram provided on page 10. 5. a. Verify normal operation. b. Verify mitigation function. c. Verify system returns to normal operation. 6. Install and mount the kit.
Please consult the WIRING FOR VARIOUS CONTROL SYSTEM section below, to understand the scope of wiring.
NON-A2L FURNACE INTEGRATION KIT
RUNNING THE SYSTEM TEST IS MANDATORY FOR ALL INSTALLATIONS. THE HVAC SYSTEM MUST NOT COMPLETE COMMISSIONING UNTIL THE INSTALLATION STEPS LISTED IN THIS MANUAL HAVE BEEN SUCCESSFULLY COMPLETED.
1. Identify the type of control system being installed. a. Non-Communicating System (indoor / outdoor units that only use standard thermostat inputs such as Y, W and G for control). b. ComfortBridge Communicating System (indoor unit contains a ComfortBridge control and is connected to the outdoor unit using wire terminals labeled 1 and 2. Indoor unit is then connected to thermostat using standard thermostat inputs such as Y, W and G).

d. ComfortNet Communicating System (Indoor unit, Outdoor unit and Thermostat are all connected using terminals labeled 1 and 2).
e. ComfortNet Communicating System with EEV Coil (Indoor unit, Outdoor unit, EEV Coil and Thermostat are all connected using terminals labeled 1 and 2).
f. ComfortNet Mixed Mode System (Indoor unit and communicating thermostat are connected using terminals labeled 1 and 2. Single stage noncommunicating outdoor AC unit is controlled by the indoor control board’s Y terminal).
g. ComfortNet Non-Communicating System (Indoor and/or outdoor unit contains a ComfortNet control, but they are not wired together using terminals labeled 1 and 2. All wiring is done using standard thermostat inputs such as Y, W and G).
2. Using the appropriate wiring diagram that matches the controls being installed, make all the appropriate wire connections using standard thermostat wire. It is not recommended to insert multiple wires into a single terminal block. Using wire nuts is recommended to achieve this.
3. Connect the R-32 sensor from the coil to the Non-A2L Furnace Integration Kit control board (4 pin connection point). ATTENTION! AFTER THE CONNECTION OF THE A2L SENSOR AND THE NON-A2L FURNACE INTEGRATION KIT, ENSURE THE A2L SENSOR IS KEPT IN ITS ORIGINAL LOCATION AND CORRECTLY MOUNTED IN THE SENSOR BRACKET.

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4. Turn power on to indoor and outdoor units (this will apply power to the Non-A2L Furnace Integration Kit control board) and make sure the thermostat is in the OFF mode (no cooling or heating calls being made). The red LED on the Non-A2L Furnace Integration Kit
continuously).

c. The HVAC operation that was chosen should turn short period of time (times will vary depending on the installed system but Electric Heat or Gas Heat
d. The indoor blower will begin to operate within 30 seconds and remain running.

5. If a communicating system has been installed (ComfortNet or ComfortBridge), wait until the
both the indoor unit and outdoor units before proceeding to step 6.
6. Test all modes of operation with the system to make sure they are functioning properly (Fan Only Mode, Cooling Mode, Heating Mode). This step does not involve the Non-A2L Furnace Integration Kit. The
system before testing the Non-A2L Furnace Integration Kit functionality. 7. of R-32 Leak Mitigation depending on one of the below systems.

e. was successful. It is recommended to wait for the full 5-minute test to expire. However, pressing the same push button once will automatically exit this test mode.
f. Wait for the system to return to the state it was
automatically recover, and then repeat the tests using the other HVAC modes not previously tested. It is extremely important to verify the Non-A2L Furnace Integration Kit will function properly for all modes of operation.

Perform the control R-32 leakage test for all modes of
Emergency heating, Constant fan and Idle. Each test will take approximately 2 to 15 minutes.
a. Set the thermostat to one of the operation modes and ensure system is running properly in that mode. Note which mode is being tested. The test sequence will need to be run again under the other modes as well.
b. Locate the push button on the Non-A2L Furnace Integration Kit control and press it two times (See Reference to the push button on page 2). You will hear all the relays on the Non-A2L Furnace Integration Kit control switch as it goes into R-32

Perform the control R-32 leakage test for all modes of
heating, Constant fan and Idle. Each test will take approximately 2 to 15 minutes.
a. Set the thermostat to one of the operation modes and ensure system is running properly in that mode. Note which mode is being tested. The test sequence will need to be run again under the other modes as well.
b. Disconnect the R32 sensor from the Non-A2L Furnace Integration Kit control board. The relays will switch after 5 seconds and the LED will display

rapidly during this 5-minute test mode. 5

c. short period of time (times will vary depending on the installed system but Electric Heat or Gas Communicating outdoor unit could take up to 12
d. The indoor blower will begin to operate within 30 seconds and remain running.

NOTE: If a R-32 leak is detected, the Non-A2L Furnace Integration Kit control will automatically enter R-32 Mitigation mode. R-32 Mitigation mode provides the same performance as seen during the test mode. The NonA2L Furnace Integration Kit will ensure all HVAC system
blower is running. After the R-32 sensor no longer detects refrigerant, the system will remain in mitigation mode for an additional 5 minutes. During this 5-minute period the
continuously on. After 5 minutes, the Non-A2L Furnace Integration Kit will allow the system to return to normal

e. was successful. Reconnect the R32 sensor. The on-board LED will turn solid on once the sensor is detected and the system will remain in this mode for 5 minutes before exiting.
f. Wait for the system to return to the state it was
automatically recover, and then repeat the tests using the other HVAC modes not previously tested. It is extremely important to verify the Non-A2L Furnace Integration Kit will function properly for all modes of operation.

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A2L STATUS CODES

MODE

Definition

1 Normal Operation No faults to report

LED Flashing Pattern Slow LED flashing pattern (2 seconds on and 2 seconds off)

RED LED’S STATUS Recommended actions
No action

2

R-32 Leak Alarm

R-32 leak is currently being detected

Fast LED Flashing Pattern

The controls and sensor are working properly. Identify where the leak is coming from and address the leak.

Notes:

After R-32 leak or

Alarm has been

cleared, the unit will

3 Delay Mode

remain in alarm

mode for 5 minutes

before returning to

normal operation

LED will be on continuously

Check HVAC performance (Cooling and

Heating Modes). Check system pressures and After any alarm or fault, it is required to remain in R-

lines for any leaks. Re-Check HVAC

32 mitigation mode for 5 minutes.

performance after addressing any issues.

4

System Verification Mode

Manual test run by contractor to
simulate R-32 Leak Alarm (test will last for 5 minutes max)

Fast LED Flashing Pattern

No actions needed

To Enter system verification test mode, press the button on the control 2 times within 5 seconds. The control will enter a simulated R-32 Leak Alarm state
and remain in that mode for 5 minutes. After 5 minutes, the control will return to Normal Operation
automatically. If the contractor wants to end the test early they need to press the button one time.

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Control Board Internal Fault

Control board has detected an issue
with the R-32 detection system

1. Unplug and plug the R-32 sensor back in.

Cycle power to the system.

2. If control is in Normal Operation or Delay

mode, there is no more issue. If not, continue

LED will flash 2 times and then be off for 5 seconds before repeating the
pattern

with diagnostics 3) Unplug R-32 sensor and leave unplugged.
Cycle power to the system 4) If control still displays “Control Board

Internal Fault” (2 flash pattern) replace the

control. If control now displays “R-32 Sensor

Communication Fault” (3 flash pattern)

replace the sensor.

These steps will determine if the error is on the board or external to the board.

R-32 Sensor 6 Communication
Fault

Control board does not have
communications with R-32 sensor

LED will flash 3 times and then be off for 5 seconds before repeating the
pattern

1. Unplug and plug the R-32 sensor back in. Cycle power to the system.
2. If control is in Normal Operation or Delay mode, there is no more issue. If not, continue
   with diagnostics 3) If control still displays “R-32 Sensor Communication Fault” (3 flash pattern), Relace both the sensor and the PCB,

If the control cannot talk to the sensor there could be a problem with the sensor, a problem with the sensor harness or a problem internal to the control. The field will not be able to measure anything to
reliably fix this error assuming the connector is properly secured to the control. Replacing both is
the only option.

1. Unplug and plug the R-32 sensor back in.

Cycle power to the system.

R-32 Sensor has LED will blink 4 times and then be off 2) If control is in Normal Operation or Delay

7 R-32 Sensor Fault reported an internal for 5 seconds before repeating the mode, there is no more issue. If not, continue

issue

pattern

with diagnostics

3. If control still displays “R-32 Sensor Fault”

(4 flash pattern), Relace both the sensor.

This means communications to the sensor are perfectly fine. The sensor itself is reporting an
internal fault.

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Vt_In and Vt_Out terminals are intended to be use as a low voltage signal to turn on any installed ventilator if an R32 leak is detected (24VAC at 1A max). The connection between the terminals is normally open and closes if there is R32 leak.

The Alarm output is only to be used with specific A2L accessories. Wiring instructions for using this terminal will be detailed in the installation manuals of these other accessory products. Do not use this terminal unless specifically instructed to.

Check that all the cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other sources such as furnace blower or modular blower.

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DAIKIN

GOODMAN® BRAND

AMANA® BRAND

19001 Kermier Rd., Waller, TX 77484 wwww.daikincomfort.com · www.goodmanmfg.com · www.amana-hac.com
© 2024 Daikin Comfort Technologies Manufacturing, L.P.
is a registered trademark of Maytag Corporation or its related companies and is used under license. All rights reserved.
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References

• Quality, Durable Heating & Air Conditioning Systems From Amana
• Contact Amana Heating & Air Conditioning
• Air Conditioning and Heating Systems| HVAC | Goodman
• Contact Us | Goodman Manufacturing
• Daikin Comfort - Perfecting The Air We Share
• Daikin Comfort - Perfecting The Air We Share

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