Skuttle
®
Model 592-9
24-Volt Spray Humidifier
for Heat Pumps and
High-Efficiency Furnaces
IMPORTANT:
THIS HUMIDIFIER MUST BE INSTALLED BY A QUALIFIED CONTRACTOR.
DO NOT INSTALL ON ANY SYSTEM WITH WATER PRESSURE
LESS THAN 40 P.S.I.
Installation on water systems with hardness ratings greater than 7 grains
is not recommended. Such installations can result in nozzle blockage,
dripping, erratic spray patterns and other maintenance problems.
Hardness above 7 grains will also produce dust from solids in the water
supply, which will be distributed throughout the home. Consult your
municipal water provider before continuing.
SAFETY PRECAUTIONS
READ THESE PRECAUTIONS AND ALL INSTALLATION INSTRUCTIONS
BEFORE INSTALLING THE HUMIDIFIER.
NOTE:
Skuttle Mfg. Co. assumes no responsibility under warranty
if installer does not follow these instructions and safety precautions.
Do not install a humidifier where the heating temperatures can exceed 200°F.
Excessive temperatures will damage the humidifier, possibly causing an
overflow condition and water damage to the home.
Do not install a humidifier where the surrounding temperature can be 32°F
or colder. Frozen water will damage the humidifier and burst the supply
pipe, resulting in home damage.
Do not cut or drill into any air conditioning or electrical accessories during
humidifier installation.
DANGER: Electrocution is possible if you come
in contact with a live wire; blindness can occur if refrigerant contacts
your eyes.
When the humidifier is installed in an area where water damage could
occur, connect the humidifier’s overflow provision to a suitable drain pan.
For above-ceiling installations, always install a drain safety pan, plumbed to
a suitable drain.
For initial recommended humidistat settings, refer to Table 1, below. (Be-
cause relative humidity affects people differently, these settings can be
raised or lowered slightly to suit personal comfort levels.)
CAUTION: Setting the humidistat higher than the recommended set-
ting can cause condensation, resulting in home damage.
If excessive
moisture appears on windows or walls, reduce the humidistat’s humidity
setting enough to eliminate condensation. If the situation continues, turn off
the humidifier’s water source until condensation is gone.
Make sure the installation, wiring and plumbing of the humidifier comply
with local codes, ordinances and regulations.
INSTRUCTIONS
GENERAL INFORMATION:
1.0 This humidifier puts moisture into the home by spraying a fine mist of water
into the warm air plenum, which is carried into the living area by the duct system.
1.1 When wired as recommended, the humidifier will operate only when the
furnace blower is operating and the humidistat is calling for humidity.
1.2 The nozzle capacity (flow) is rated at 40 P.S.I. This capacity varies accord-
ing to line pressure, as shown in Table 2, below. Select the nozzle that delivers
the required spray in accordance with the pressure in your area.
1.3 If the water pressure is excessive, a pressure regulator valve will be neces-
sary to obtain the proper volume of moisture.
REQUIRED TOOLS:
2.0 Aviation Snips • #2 Flathead Screwdriver • #1 Phillips Screwdriver • Ad-
justable Wrench • Pliers • Electric Drill with 7/64", 3/32", 1/4" and 3/8" Drill
Bits • Hammer • Center Punch
INSTALLATION INSTRUCTIONS
Outside
Temperature
Recommended
Setting
Outside
Temperature
Recommended
Setting
-
20°F
Low
+10°F
Med
-
10°F
Low
+20°F
High
0°F
Med
Above +20°F
High
Table 1
Capacities in G.P.H. at Various Water Pressures
Nozzle Size
40 P.S.I.
60 P.S.I.
80 P.S.I.
100 P.S.I.
125 P.S.I.
.37
.37 G.P.H.
.45 G.P.H.
.55 G.P.H.
.60 G.P.H.
.70 G.P.H.
.50
.50 G.P.H.
.60 G.P.H.
.70 G.P.H.
.80 G.P.H.
.85 G.P.H.
.75
.75 G.P.H.
.89 G.P.H.
1.10 G.P.H.
1.20 G.P.H.
1.40 G.P.H.
1.00
1.00 G.P.H.
1.20 G.P.H.
1.40 G.P.H.
1.60 G.P.H.
1.70 G.P.H.
1.50
1.50 G.P.H.
1.80 G.P.H.
2.10 G.P.H.
2.40 G.P.H.
2.70 G.P.H.
2.00
2.00 G.P.H.
2.50 G.P.H.
2.80 G.P.H.
3.20 G.P.H.
3.50 G.P.H.
Table 2
101 Margaret Street, Marietta, OH 45750
Phone: (800) 848-9786 • Fax: (740) 373-9565
Email: [email protected] • Web: www.skuttle.com
INSTALLING THE HUMIDIFIER:
3.0
CAUTION:
When selecting a location for the humidifier, make sure the
spray will not impinge or accumulate on any fan, limit controls, resistance heat-
ing coils or heating/air coils.
3.1 Select a location where the air will push the spray mist away from the
humidifier.
3.2 Mount the humidifier on the warm air
plenum only, with the nozzle pointing up in
the direction of airflow (see Figure 1, left).
On narrow plenums, mount the humidifier
on the narrow side.
3.3 If there is not enough room on the
warm air plenum, mount the humidifier
further downstream on the warm air duct,
away from the heating and cooling coil.
3.4 If it is necessary to mount the spray
nozzle further away from the humidifier (in
order to move the nozzle further into the
air stream for better absorption), remove
the nozzle adapter and 45° fitting from the
solenoid valve. Use the fittings supplied in
the parts bag to relocate the nozzle using
1/4" copper tubing (not supplied). (See
Figure 2, below, left.)
CAUTION:
Do not
allow copper tubing to come in contact
with sharp edges or surfaces that may
cause wear on the tubing.
3.5 Tape the template
(provided) on the warm air
plenum in the location
selected for the humidifier.
CAUTION:
Make sure the
template is level.
3.6 Center punch and drill
four 7/64" mounting holes,
as shown on the template.
DANGER:
Make sure you
are not cutting or drilling in-
to air conditioning or elec-
trical accessories.
3.7 Drill a 3/8" hole in the
center of the shaded area
of the template; cut a rec-
tangular opening (staying
within the shaded area), as
indicated.
3.8 Install the drain cup
over the nozzle; attach it
with a #6 x 3/8" sheet
metal screw. (See Figure
3, left.)
3.9 Install 3/16" I.D. tubing
on the copper humidifier
drain and run it to a waste
drain. (An occasional drip
from the drain tube when
the humidifier is operating
is normal.)
3.10 Attach the humidifier
with four #8 sheet metal
screws.
INSTALLING THE INSPECTION WINDOW:
NOTE:
A clear, plastic window is supplied with the humidifier to be mounted on
the ductwork. This allows you to observe whether the humidifier is functioning
properly, and whether there is water impinging on parts or surfaces within the
system.
4.0 Select a mounting location on the ductwork where the humidifier spray
nozzle can be viewed easily.
4.1 Drill a 3/8" hole and cut a 4-1/2" x 2" rectangular opening.
DANGER: Make
certain that you are not drilling or cutting into any air conditioning or elec-
trical accessories during installation.
4.2 Position the window over the opening; mark and center-punch the two
mounting hole locations.
4.3 Drill the two 3/32" mounting holes.
4.4 Attach the window with the two #6 Phillips-head screws provided.
Part No. 000-0756-233
Rev. 8/03 HBP
BEGIN READING ON OPPOSITE PANEL
Continued on back...
Figure 1
Figure 2
Figure 3
EXAMPLE:
A home which requires .50 gallons of water per hour for proper hu-
midification, and which has a water pressure of 80 P.S.I., would need a .37 noz-
zle to do the job.
