Advertisement
Quick Links
A2L
RDS
KITS
Field
Mounting
Instructions
373 Atascocita Rd.,
Humble, TX 77396
Phone: 800.423.9007
Fax: 281.441.6510
www.aspenmfg.com
INSTALLATION GUIDE & FIELD
MOUNTING INSTRUCTIONS
OVERVIEW: The mitigation control system consists of a refrigerant detection sensor mounted on
a sensor bracket, wire harness connecting the sensor to the mitigation board, a control box with a
mitigation control board and optional relay, and a wire harness for connecting the system to a new/
existing field wiring/air moving system.
Refer to Figure-A and A1 below for complete system:
Sensor Cable
Refrigerant
Detection Sensor
Figure A1 - Mitigation Control Boards
(cover removed to show internal components)
Standard Mitigation
Option "S"
ASPEN A2L MITIGATION
CONTROL SYSTEM
Figure A - Mitigation Control System
Standard + Accessory
Control Option "R"
1
Field connection
wiring
Field low-volt wiring
Field connection to
furnace thermostat
wiring
INSTALLATION: The mitigation system
is required to be installed in the field by
an A2L-trained HVAC contractor at the
time of installation following these steps:
1. For cased A-coils, remove coil casing
front panels to expose the entire
evaporator coil. For uncased coils,
slide the coil into the field provided coil
casing. For slab coils, remove the
side panel on the refrigerant pip-
ing side. For dedicated horizontal/
plenum coils, skip to step three.
IO-A2L-001-REV3 | A2L-RDS-KIT-IO-2025-02
Advertisement
Summary of Contents for Aspen A2L
- Page 1 INSTALLATION: The mitigation system (cover removed to show internal components) is required to be installed in the field by an A2L-trained HVAC contractor at the time of installation following these steps: 1. For cased A-coils, remove coil casing front panels to expose the entire evaporator coil.
- Page 2 These markings will alert any Figure C technician servicing the installation in the future that the system is charged with an A2L refrigerant. Figure F Mount mitigation board enclosure to a nearby flat, vertical surface by using a.) the included two-sided tape or b.) using field-supplied screws;...
- Page 3 Open the enclosure to access the complete. mitigation control board. Once the system is powered, the control will communicate with the A2L sensor to request data NOTE: If the A2L REFRIGERANT DETECTION SYSTEM on the concentration of airborne refrigerant within the coil...
- Page 4 WIRING DIAGRAMS - STANDARD: SINGLE STAGE AIR CONDITIONER 2 STAGE AIR CONDITIONER IO-A2L-001-REV3 | A2L-RDS-KIT-IO-2025-02...
- Page 5 SINGLE STAGE HEAT PUMP 2 STAGE HEAT PUMP IO-A2L-001-REV3 | A2L-RDS-KIT-IO-2025-02...
- Page 6 Once the system as but not limited to electric heat or gas is powered, the control will communicate with the A2L sensor heat or air cleaner at the same time, then to request data on the concentration of airborne refrigerant it will energize the indoor blower.
- Page 7 WIRING DIAGRAMS - WITH ACCESSORY CONTROL KIT: SINGLE STAGE AIR CONDITIONER 2 STAGE AIR CONDITIONER IO-A2L-001-REV3 | A2L-RDS-KIT-IO-2025-02...
- Page 8 SINGLE STAGE HEAT PUMP 2 STAGE HEAT PUMP IO-A2L-001-REV3 | A2L-RDS-KIT-IO-2025-02...
- Page 9 Humble, TX 77396 Phone: 281.441.6500 Toll Free: 800.423.9007 Fax: 281.441.6510 www.aspenmfg.com Scan QR Code to visit Aspen’s website Revised 02/2025. Subject to change without notice and without incurring obligation. © Copyright 2025 Aspen Manufacturing. All Rights Reserved IO-A2L-001-REV3 | A2L-RDS-KIT-IO-2025-02...
Need help?
Do you have a question about the A2L and is the answer not in the manual?
Questions and answers
White therm wire from rods goes Tony on star and. Y on furnace board ? Other white wire from rods goes to condenser ? Grey wire to nothing ?