Mounting The Controller In A Closet Return Plenum; Mounting The Outdoor Temperature Sensor - Aprilaire 8126 Series Installation And Operation Manual

MOUNTING THE CONTROLLER IN A CLOSET RETURN PLENUM

NOTE: Do not mount directly in the path of the outdoor air . Mount the control where it will
sense the relative humidity of the return air .
1. Remove the wall plate from the control and put the rest of the control in a safe location until
after wiring is complete .
2. Use spacers or brackets to mount the controller to an inside wall surface or return plenum/
duct surface that is at room temperature (i . e . do not mount to supply ductwork or to the air
handler/furnace) to space the wall bracket a minimum of ½" away from the surface .
3. Mount the wall bracket to the surface using #8 screws (field supplied – do not use flat head
screws) and wall anchors (field supplied) if mounting to drywall . Ensure that there is room
for air to flow behind the wall bracket . DO NOT install screws in the wall bracket anywhere
except intended mounting holes.
SPACER (2)
WALL PLATE
1/2"
#8 SCREW (2) DO NOT
USE FLAT HEAD SCREWS
8

MOUNTING THE OUTDOOR TEMPERATURE SENSOR

1. Drill a 3/8" diameter hole in the duct of the fresh air inlet hood .
2. Install the outdoor temperature sensor into the duct and use metal foil tap to secure it in place
and seal the opening . Run the wire toward the outside wall .
3. Secure ductwork to the inlet hood duct while allowing the wire of the sensor to extend outside
of the insulation . Tape and/or mastic the duct as needed and properly insulate .
1
FRESH AIR
INLET HOOD
90-2265
90-2278
USE METAL FOIL
TAPE TO SECURE
3
SENSOR TO DUCT
3/8" DIA
HOLE
OUTDOOR
2 TEMPERATURE
SENSOR
9
INSULATED
FLEX DUCT
ENSURE PROPER
SEAL TO PREVENT
CONDENSATION