Mounting The Controller To The Return Ductwork - Aprilaire 8126 Series Installation And Operation Manual

MOUNTING THE CONTROLLER TO THE RETURN DUCTWORK

NOTE: Mount the controller to the return ductwork at a location where the temperature
and humidity in the duct is most representative of the home . Keep the controller at least 6"
upstream from the point where the fresh air duct enters the return duct, and 6" upstream from
a humidifier outlet .
Sheet Metal Installation
1. Remove the wall plate from the control and put the rest of the control in a safe location until
after wiring is completed .
2. Mark the location of the wall plate sensor hole on the duct . Use a step-drill bit to create a 5/8"
( . 6 25") hole for the sensor .
3. Center the sensor hole in the wall plate over the hole in the duct, level the wall plate and mark
the locations of the two mounting slots . Drill a small pilot hole using a #36 ( . 1 06") or smaller
drill bit at the two mounting locations .
4. Use the supplied #8 standard hex head sheet metal screws to mount the wall plate to the duct .
PILOT HOLES FOR SCREWS
5/8" DIA
HOLE
6" MIN
FRESH AIR DUCT
90-2269
WALL PLATE
#8 HEX HEAD
SCREWS
FRESH 5/8" DIA
AIR DUCT
HOLE
6" MIN
6
Duct Board Installation
1. Take out the duct board mounting bracket, remove the wall plate from the control and put the
rest of the control in a safe location until after wiring is completed .
2. Cut a 5 . 7 5" x 5 . 2 5" rectangular opening in the return plenum . Save the piece cut out to
insulate the duct board bracket around the controller . The display of the control will run
parallel with the long dimension . DO NOT MOUNT THE CONTROL IN A POSITION WHERE IT IS
FACING DOWN .
3. Use the supplied #8 x 1/2" type 25 pan head screws to mount the control wall plate to the
duct board mounting bracket .
4. Place the bracket in the cut out and seal in place using metal foil tape and/or mastic .
5. Insulate the duct board bracket around the wall plate using the plug cut out of the duct board .
RETURN DUCT
DUCT
BOARD
BRACKET
WALL PLATE
#8 PAN HEAD
PILOT HOLES FOR SCREWS
TYPE 25 SCREW
WALL PLATE
#8 HEX HEAD
SCREWS
FRESH AIR DUCT
6" MIN
5-3/4"
5-1/4"
DUCT BOARD
RETURN PLENUM
MOUNT VENT CONTROLLER
SIDE AND TOP ONLY
USE CUT-OUT INSULATION
TO INSULATE DUCT BOARD
BRACKET AROUND CONTROLLER
7
90-2264