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RH Series HC-67x3 Humidity Controllers Installation Instructions
1-3/8 in.
(35 mm)
Hole
Drywall
Spacer (2) for
3/8 in. (9.5 mm) and 1/2 in.
(12.7 mm) Thick Drywall
1-3/8 in.
(35 mm)
Hole
Spring
Clip (2)
Drywall
Drywall
Spring
Clip (2)
Base
No. 6-20 x 1.25 in.
Pan-head
Tapping Screw (2)
Figure 6: Surface Mounting to Drywall
Duct Probe Humidity Controller: Parts Included
•
HC-6703-6N00P duct probe humidity controller
•
No. 8 x 1 in. Phillips-head sheet metal screw (2)
•
washer for use with conduit fitting
Note:
Conduit fitting and nut are not provided.
Duct Probe Humidity Controller:Special Tools
Needed
•
hole saw with 1 in. (25 mm) diameter blade
•
drill with 1/8 in. (3 mm) drill bit
•
1/8 in. (3 mm) flat-blade and No. 2 Phillips
screwdrivers
•
pliers
•
gasket, sealer, or other material to seal the area
between the unit and the duct
Duct Probe Mounting Location Considerations
Place the duct probe humidity controller in a location
that complies with the following:
•
Position: Designed for duct mounting in any
position, except with the probe tip pointed up.
•
Duct Diameter: Recommended minimum diameter
(round ducts) or width (square ducts) is 12 in.
(305 mm).
•
Air Stratification (when the unit is mounted on the
discharge side of the fan): Recommended location
is at least 8 ft (2.4 m) downstream from the
humidification equipment, where duct air and
water vapor are sufficiently mixed. Avoid areas
where the probe may be exposed to condensation.
To mount the duct probe humidity controller, refer to
Figure 7, and proceed as follows:
1. Remove any excess insulation from the duct that
prevents the probe from extending a minimum of
3 in. (76 mm) into the air stream.
2. Use the hole saw to make a 1 in. (25.4 mm) hole
in the duct for inserting the probe.
3. Pull the plastic cover off the housing.
Housing
Conduit Hole
Snap-on Cover
Conduit Knockout
(Top and Bottom
of Cover)
Duct
Washer (Cupped Side
Toward Housing)
Conduit Fitting
(Not Provided)
Nut for Conduit Fitting
(Not Provided)
No. 8
Screw
(2)
Figure 7: Mounting and Assembly
4. Insert the probe into the duct, and mark the
location of the holes for the mounting screws.
5. Remove the unit, and drill a 1/8 in. (3 mm) hole for
each mounting screw.
IMPORTANT:
Remove the unit before drilling
to prevent any metal remnants from falling onto the
circuit board. Seal any holes created during
installation to help reduce drafts and for more
accurate humidity readings.
6. Use a gasket, sealer, or other means to seal the
area around the 1 in. (25.4 mm) hole between the
unit and the duct.
7. Reinsert the probe, and secure the housing to the
duct using the two No. 8 screws provided.
