RETURN AIR DUCT INSTALLATION
1
Locate the humidistat in the return air duct at least 12 in. up stream
prior to the humidifier or the humidifier by-pass tube.
2
Remove the backing and adhere the humidistat mounting template
in a horizontal position, make sure it is level.
3
Drill four 7/64 in. mounting holes.
4
Drill 1/2 in. hole in the center of the template and use tin snips to
cut the rectangular hole designated by the dotted lines then remove
template.
5
Remove the backing and adhere the gasket over the opening area.
6
Connect the low voltage wires to the humidistat terminals. Tuck the
wire into the recessed area on the back of the base plate.
7
Use sheet metal screws to securely fasten the humidistat to the
return air duct.
k
!
CAUTION:
*
Mount the humidistat in the return air duct only,
installation on the warm air duct will destroy humidistat
element.
*
Make certain the wires stay in the slot under the
mounting base.
WALL MOUNT INSTALLATION
1
Locate the humidistat about 5 ft. above the floor, on an inside wall,
away from discharge registers. Also, avoid areas with extreme
variation in relative humidity levels; i.e. bathrooms and kitchens.
When wall mounting, homeowners usually prefer the humidistat
mounted beside, or in the vicinity of the heating thermostat.
2
For conversion to a wall mount configuration, simply pull the
indicator knob off and remove the mounting screws, and rotate
the control 180° and reattach the mounting base Fig 2.
3
Drill a 3/8 in. hole in the indention on the mounting base plate.
4
Place the base assembly in the predetermined location on the wall,
in a horizontal position, make sure it is level. Mark and drill a 3/8
in. hole in the wall.
5
Run low voltage wire to the location and pull about 6 in. of wire
through the hole.
6
Plug the hole with nonflammable insulation to prevent drafts from
affecting the humidistat operation.
7
Position the base assembly over the wire and pull the wire through
the hole previously drilled in the plate.
8
Use four 1 in. screws to secure the mounting base plate to the wall.
9
Connect the wires to the terminals on the control.
10 Use one 3/8 in. screw to secure the humidistat cover.
11 Remove the backing and adhere the cover label to the recessed area
on the front of the cover.
12 Push the indicator knob onto the control shaft.
Figure 1: Wiring Diagram
Figure 2: Wall Mounting Diagram
3/8 In. Screw
Humidistat
1 In. Screws
Mounting base
3/8 in. Screws
Drill 3/8 in. hole
for wires
Wire terminals
Humidistat cover
Cover label
Knob
