Aprilaire 8120X User Manual

MIN/
HR
CODE
Model 8120X
Digital Ventilation Controller
Installation and
Operation Manual

Aprilaire 8120X Specifications

General

Model	8120X
Category	Controller
Power Supply	24 VAC
Installation	Wall-mounted
Outdoor Temperature Sensor	Optional
Display	Digital
Compatibility	Aprilaire Humidifiers
Dimensions	4.5" x 1.25"

Summary

Warnings and Cautions

WARNING

120 volts can cause serious injury from electric shock. Disconnect electrical power to the HVAC system before proceeding.

NOTICE

Ensure furnace blower runs long enough after heat call to prevent over-temperature.

Package Contents

Specifications

Mounting the Controller and Outdoor Temperature Sensor

Mounting to an 8140NC Ventilator

Mount the control to the return duct and the outdoor sensor as shown on pages 6-9 if humidity limits are important.

Mounting the Controller in a Closet Return Plenum

Mounting the Outdoor Temperature Sensor

Wiring

Wiring to Furnace

Connect the control to the HVAC equipment according to Figure 1.

Wiring to Heat Pump

Connect the control to the HVAC equipment according to Figure 2.

Wiring to Model 8140NC Fresh Air Ventilator

Connect the control to the 8140NC ventilator according to Figure 3.

Wiring to Model 6506 Damper

Connect the control to the Model 6506 damper according to Figure 4.

Operation

Set Up Menu

Test Mode

Test Sequence

Verify all ventilation system components and wiring function correctly.

Rater/Inspector Verification

Sequence of Operation – "Code" Setting

Sequence of Operation – "Comfort" Setting

Limited Warranty

Warranty Registration

Register your Aprilaire product online or by mail to activate warranty.