4
5
Tools and Materials Needed
Safety glasses
Tin snips or aviation snips
Electric drill
/8" and 7/64" drill bits
Pliers
Screwdrivers (medium flat point and Phillips #1)
Level
Hammer
Small adjustable wrench
Center punch
Knife
Wire and hardware to connect fan control
Additional relay(s)
For some installations:
Duct tape
1/4" copper water line
Tubing and fittings for the overflow connection
2 conductor low-voltage wire
Selecting a Location
For most installations, mount the humidifier under the horizontal warm
air supply duct. As an alternative, the unit can be mounted on a verti
-
cal plenum using a fabricated transition for support. (See “Mounting the
Humidifier”, pages 5-7.)
NOTE:
Ideally the White-Rodgers ComfortPlus Steam Humidifier is not
intended for installation in or on the return air duct or plenum. However,
some contractors do so without complications.
If you choose to install
a ComfortPlus Steam Humidifier under a return air duct or on
a return air plenum, be aware that moisture MUST be absorbed
BEFORE entering the filter, blower, turn or transition. Therefore,
INSTALL THE HUMIDIFIER AT LEAST 4-TO-6 FEET PRIOR TO
THESE DEVICES AND CONFIGURATIONS.
Select a location where the humidifier can be plugged in without the
use of an extension cord. (See separate manual, “Wiring Instructions for
High-Capacity Steam Humidifiers”.)
Select a location that will not allow steam to condense on the system air
mover, electrical components, etc.
Mount the unit on rigid metal ductwork, never on duct board or internally-
insulated duct.
1.
2.
.
4.
5.
6.
7.
8.
9.
10.
11.
12.
1.
14.
15.
16.
17.
1.
2.
.
4.
CAUTION:
For all installation configurations, the mounting area
must be strong enough to support the humidifier’s weight when
it is full of water
(approximately 18 lbs.), and to hold the humidifier in
a level position for safe, reliable operation. Otherwise, additional duct
reinforcement will be necessary.
NOTE:
If the installation includes exposed insulated materials, a sec
-
tion of the ductwork must be removed and replaced with rigid metal duct
extending at least 6 feet downstream from the humidifier.
Mount the unit at least 4-to-6 feet after the plenum transition. Avoid sud-
den turns or transitions in the ductwork in the immediate area down
-
stream from the humidifier.
5.
To install Option A:
Place the mounting bracket (provided)
on the edge of the ductwork where the
humidifier is to be installed.
Use a marker to trace around the in
-
side of the mounting bracket. Cut out
the duct opening.
CAUTION:
DO NOT
attach the
mounting bracket before the hole in
the ductwork has been cut.
1.
2.
Mounting the Humidifier
Option A
is the preferred method of
mounting
because it requires the least
amount or duct reinforcement to support
the humidifier and keep it level. A duct
width of at least 10 inches is necessary.
Wider ducts may need to be reinforced in
order to hold the humidifier level.
DANGER:
Wear safety glasses when
cutting or drilling.
Do not cut or drill
into any air conditioning components or
electrical enclosures during installation.
Electrocution is possible if you come
in contact with a live electrical wire;
blindness can occur if refrigerant con
-
tacts your eyes.
Attach the mounting bracket to the ductwork with sheet metal screws.
Attach the L-shaped bracket to the top/front of the humidifier, so that the
vertical wall is toward the reservoir.
.
4.
Figure 1
—Option A:
Duct Edge Mount
Figure 2
—Mounting Bracket