AprilAire 8022 3-Wire to 4-Wire Thermostat Adapter
AprilAire 8022 3-Wire to 4-Wire Thermostat Adapter
Available to order — ships from incoming stock
Typically ships in 1–3 Business Days (Western Canada) · 3–6 Business Days (Eastern Canada)
SKU:8022
MPN: 8022
A practical add-a-wire solution for thermostat retrofits where pulling new cable is difficult.
The AprilAire 8022 3-Wire to 4-Wire Adapter allows an installer to combine two thermostat equipment functions onto one existing conductor using the included diode assembly, then separate those signals at the HVAC equipment.
It is intended for situations where an extra conductor is needed, a thermostat wire is damaged, or a common-wire solution is required and replacing the cable is impractical.
Key Features
- Adds an additional usable thermostat conductor without replacing the existing cable.
- Can help repair a broken thermostat conductor.
- Can be used to add a common wire in supported 4-wire applications.
- Designed to mount inside the HVAC equipment or control enclosure.
- 24VAC Class 2 thermostat accessory.
- Package includes adapter board, diode Y and wire nuts.
- AprilAire accessory listings associate the 8022 with current S84 and S86 thermostat families.
Application & Compatibility
Do not connect the diode pair to the thermostat R or C terminals. Follow the AprilAire wiring diagram for the exact equipment functions being combined. This is an installer wiring accessory, not a universal substitute for every missing-conductor situation.
Key Specifications
| Model | 8022 |
|---|---|
| Product Type | 3-wire to 4-wire thermostat adapter |
| System Voltage | 24VAC Class 2 |
| Mounting Location | Inside HVAC unit or control box |
| Included | Adapter, diode Y, wire nuts |
Related AprilAire Products
- AprilAire S84NSU Universal 1H/1C or 2H/1C Heat Pump Thermostat
- AprilAire S84N1H1C Single-Stage 1H/1C Programmable Thermostat
- AprilAire S86NMU Multi-Stage Universal Programmable Thermostat
- AprilAire S86NMUPR Multi-Stage Programmable IAQ Thermostat
- AprilAire S86WMUPR Wi-Fi Multi-Stage Programmable IAQ Thermostat
Frequently Asked Questions
What problem does the AprilAire 8022 solve?
It can provide an additional thermostat conductor, repair a broken wire path or support a common-wire retrofit without pulling a new cable.
Can I use the diode pair on R or C?
No. AprilAire installation guidance specifically warns against connecting the diode pair to the thermostat R or C terminal.
