Aprilaire humidifiers are a popular choice for homeowners looking to improve indoor air quality by adding moisture to the air. These humidifiers come in different models and require different wiring configurations. This article provides a comprehensive guide on Aprilaire humidifier wiring diagrams to help you install your humidifier correctly.
Understanding the Basics of Aprilaire Humidifier Wiring Diagram
Before we delve into the specifics of Aprilaire humidifier wiring diagrams, it is essential to know the basic components of these humidifiers. An Aprilaire humidifier has a water supply line, a solenoid valve, a humidistat, and a blower motor. The wiring diagram shows how these components connect to each other and the thermostat or furnace control board.
Each model of Aprilaire humidifier comes with its wiring diagram. You must follow the wiring diagram specific to your unit to avoid making mistakes that could damage the humidifier or the heating system. Failure to follow the correct wiring diagram may also void the warranty.
Aprilaire humidifier wiring diagrams may look complex, but they are easy to understand with a little guidance. The diagrams provide a clear picture of the wiring connections and their color codes. The wiring diagram will show you where to connect the power supply, water supply, humidistat, and other components.
Additionally, the wiring diagram will show you how to connect the humidifier to the HVAC system, whether it is a furnace or air handler. Some Aprilaire humidifiers require an external transformer to step down the voltage from 120V to 24V, while others have an internal transformer. The wiring diagram will indicate which transformer to use and how to wire it.
FAQ
| Question | Answer |
|---|---|
| Do I need a professional to install my Aprilaire humidifier? | While you can install an Aprilaire humidifier yourself, we recommend that you hire a professional HVAC technician to ensure that the installation is done correctly. |
| What type of wire should I use for my Aprilaire humidifier? | You should use either 18 or 20 gauge wire for the control wiring and 14 or 16 gauge wire for the power wiring. |
| Can I connect my Aprilaire humidifier to my air conditioner? | No, Aprilaire humidifiers are designed to be connected to a heating system, not a cooling system. |
| Can I use my existing thermostat with my Aprilaire humidifier? | Yes, as long as your thermostat has a humidification mode or a humidistat that supports a humidifier. |
| How often do I need to replace the water panel in my Aprilaire humidifier? | You should replace your water panel once a year before the heating season begins. |
Aprilaire Humidifier Wiring Diagram for Model 600M
The Aprilaire 600M humidifier is a popular model for mid-sized homes. This humidifier requires an external transformer to step down the voltage from 120V to 24V. The following wiring diagram shows how to wire the Aprilaire 600M humidifier to a furnace control board.
Step 1: Turn Off Power to the Furnace
Before you begin wiring your Aprilaire 600M humidifier, turn off power to the furnace. You can do this by turning off the furnace switch or flipping the circuit breaker that controls the furnace.
Step 2: Mount the Humidifier
Mount the humidifier on the supply or return plenum of the furnace. The humidifier should be placed upstream of the air filter and downstream of the furnace heat exchanger. Follow the humidifier installation instructions to mount the unit correctly.
Step 3: Install the Water Supply Line and Drain Line
Connect the water supply line to the solenoid valve on the humidifier. The water supply line should be connected to a cold water pipe with a saddle valve or a tee fitting. The drain line should be connected to a nearby floor drain or a condensate pump. Follow the humidifier installation instructions to install the water supply and drain lines correctly.
Step 4: Install the Humidistat
Mount the humidistat on an interior wall near the thermostat. The humidistat should be wired to the furnace control board using 18 or 20 gauge wire. Follow the humidistat installation instructions to install the humidistat correctly.
Step 5: Wire the Humidifier to the Furnace Control Board
The following wiring diagram shows how to wire the Aprilaire 600M humidifier to a furnace control board:
| Wire Color | Humidifier Terminal | Furnace Terminal |
|---|---|---|
| Red | R | R |
| Yellow | H | HUM |
| Green | Gf | G |
| White | G | COM 24V |
Note that the wiring diagram varies depending on the humidifier model and the furnace control board. Consult the humidifier installation manual and the furnace wiring diagram to ensure that you wire the humidifier correctly.
Conclusion
Aprilaire humidifiers are an excellent way to improve indoor air quality and comfort. Proper installation and wiring of Aprilaire humidifiers are crucial for their optimal performance and longevity. We recommend that you follow the wiring diagram specific to your model and consult a professional HVAC technician if you are unsure or inexperienced in wiring and installation.
