Overview
The WalTech Vision 2.0 works with standard 24V home and commercial HVAC systems. It uses the same Coleman Mach / Airxcel single-zone wiring method (relay-based), so if you are familiar with that setup, this will feel the same.
The key difference is the power source:
- Pin #7 = +24V AC (instead of +12V DC used in RV systems)
- Pin #8 = 24V AC Common (instead of DC ground)
Everything else - heating, cooling, fan wiring - works the same way.
1 Identify Your Wiring
Turn off power at the breaker and remove your existing thermostat from the wall. Take a photo of the current wiring before disconnecting anything.
Standard 24V home thermostats use lettered wire terminals. Here is how they map to the WalTech:
| Your Thermostat Label | Function | WalTech Pin |
|---|---|---|
| R / Rc / Rh | 24V AC Power | Pin #7 |
| C | 24V AC Common | Pin #8 |
| W / W1 | Heat 1 | Pin #5 |
| W2 | Heat 2 | Pin #4 |
| B or O | Heat Pump Reversing Valve | Pin #3 |
| Y / Y1 | Compressor (AC) | Pin #2 |
| G | Fan | Pin #13 |
2 Mount the WalTech Base Plate
Use the included mounting template, screws, and wall anchors to secure the base plate to the wall. The WalTech base plate fits standard thermostat mounting holes in most homes.
Feed all wires through the opening in the base plate before securing it to the wall.
3 Connect to WalTech
Connect each wire to the corresponding WalTech pin using the push-and-lock connectors.
Power
| WalTech Pin | Connection | Notes |
|---|---|---|
| Pin #7 | +24V AC | From your R / Rc / Rh wire |
| Pin #6 | Jumper from Pin #7 | Use a short jumper wire between Pin #7 and Pin #6 |
| Pin #8 | 24V AC Common | From your C wire |
Heating
| WalTech Pin | Connection | Your Wire Label |
|---|---|---|
| Pin #5 | Heat 1 | W / W1 |
| Pin #4 | Heat 2 | W2 (if applicable) |
| Pin #3 | Heat 3 / B&O | B or O (heat pump reversing valve) |
Air Conditioning
| WalTech Pin | Connection | Your Wire Label |
|---|---|---|
| Pin #2 | Compressor | Y / Y1 |
Fan
| WalTech Pin | Connection | Your Wire Label |
|---|---|---|
| Pin #13 | High Fan | G |
| Pin #14 | Low Fan | Only if your system has a separate low-speed fan wire |
4 Power On
Snap the thermostat onto the base plate and secure it with the tightening screw. Turn the breaker back on. The WalTech Vision 2.0 should power on and display the setup wizard.
5 Configure Your System
In the setup wizard, select "Coleman / Airxcel / Home Thermostat" as your system type. This is the correct profile for all 24V home and commercial HVAC systems.
Frequently Asked Questions
Can the WalTech Vision 2.0 work with a 24V home HVAC system?
Yes. The WalTech Vision 2.0 fully supports standard 24V home and commercial HVAC systems. It uses the same relay-based wiring method as the Coleman Mach / Airxcel single-zone setup. The only difference is Pin #7 receives 24V AC instead of 12V DC, and Pin #8 connects to the 24V AC common instead of DC ground.
What is the difference between 24V AC and 12V DC?
Standard home and commercial HVAC systems use 24V AC power from a transformer inside the furnace or air handler. RV systems typically use 12V DC from the battery. The WalTech Vision 2.0 supports both voltages. The wiring method and pin layout are the same - only the power source is different. You do not need any adapters or converters.
Does the WalTech work with heat pumps that have B or O wires?
Yes. Connect your B or O wire to Pin #3 (Heater 3 / B&O) on the WalTech. After setup, go to Settings and configure whether Pin #3 controls the B or O function. This lets the WalTech properly control the reversing valve on your heat pump.
Related Articles
Coleman Mach / Airxcel Wiring
Standard single-zone relay wiring guide for RV systems.
Home / Commercial Replacement
See which home and commercial thermostats the WalTech replaces.
Error Codes
All error codes for Coleman Mach, Dometic, GE, and Furrion systems.
Coleman Mach Two Stage
Dual AC compressor systems with 9-pin + 3-pin connectors.