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II. SELECT LOCATION (SEE FIG. 5.)
Humidifier must be installed on supply plenum only. If furnace has
air conditioning coil, be sure humidifier does not interfere with coil
ends.
Remember to provide clearance for maintenance and evaporator
pad removal. To access pad remove top or bottom cover to expose
assembly (turn knob counter-clockwise).
III. PREPARE PLENUM OPENING (SEE FIG. 2.)
1. Use template for marking humidifier opening.
2. Tape in place on plenum making sure template is level.
IMPORTANT: For humidifier to operate properly it must be
level and mounted on a vertical surface.
3. Drill four 1/8-in. holes in plenum.
4. Cut opening in plenum using heavy solid lines on template
as a guide.
IV. MOUNT THE HUMIDIFIER (SEE FIG. 3.)
1. Attach foam tape on inside of mounting flange.
2. Hook bottom notch of humidifier on opening cut in plenum.
3. Push top of humidifier to plenum aligning screw holes with
flange.
4. Align, level, and secure using top screws first.
5. Insert bottom screws and tighten all screws for air tight seal.
V. INSTALL DRAIN LINE
1. Use 1/2- or 5/8-in. vinyl tubing (field supplied) to connect
drain on bottom of humidifier housing to an open drain.
2. Use supplied worm clamp to hold drain tubing in position
over drain fitting outlet.
CAUTION: Unit may leak if drain tubing is misapplied.
Do not insert tubing inside of drain fitting outlet.
3. Make sure line is free of traps due to sagging and has
sufficient pitch to drain.
VI. MAKE WATER CONNECTION
If garden hose is not used for water supply:
1. Mount saddle valve on water line according to instructions
supplied with saddle valve.
2. Run 1/4-in. diameter (water line grade) tubing from saddle
valve to adapter on solenoid valve and tighten compression
fittings.
IMPORTANT: If water pressure is higher than normal (60 psi),
use noise suppression disk included in parts bag. (Read water noise
reducer note located inside package for instructions). For normal
operation, saddle valve need only be opened 1 full turn to meet
performance requirements.
3. Open valve and check installation for leaks.
NOTE: Saddle valve is self piercing on copper lines; 1/4-in. hole
must be drilled in steel or iron pipes. Use only a grounded drill or
a hand drill to avoid shock hazard. Turn off water and drain the
pipe prior to drilling 1/4-in. hole.
VII. INSTALL HUMIDISTAT AND COMPLETE WIRING
1. Mount humidistat on inside wall, or return-air duct in
accordance with section INSTALLATION OF HUMIDIS-
TAT on page 10.
2. Wire red and blue low voltage. (See Fig. 6.)
3. Plug power cord in to 115-vac 60Hz source.
NOTE: Wiring must comply with National Electrical Code and
any local codes or ordinances that may apply.
VIII. START-UP
1. Open saddle valve to permit water flow to the solenoid.
2. Check all connections for water leaks.
3. Set thermostat to call for heat. Set humidistat for highest
humidity setting making sure contacts are closed. After a
few minutes of operation, check the drain connection for
leaks and to see if water is flowing through humidifier.
4. Reverse thermostat and humidistat settings to insure proper
shutdown.
5. Reset thermostat to normal setting. Reset humidistat to
recommended setting.
IX. FINAL STEPS
Attach humidifier maintenance instruction sticker to a visible
location.
1. Inform homeowner of proper operation, maintenance, and
humidistat setting.
a. If unit is installed during cooling season set humidistat
for summer setting (OFF or lowest setting).
b. If installed during heating season, set unit for normal
operation.
→ Fig. 5—Installation of HUMBBLFP1025-A--
Fan-Type Humidifier
A98366
VERTICAL HORIZONTAL
"N" COIL
RED
BLUE
Fig. 6—Installation of Humidistat
on Fan-Type Humidifier
A96010
HUMIDIFIER HUMIDISTAT
115V FIELD WIRING
FAN TYPE UNITS ONLY
24VAC
FURNACE
RED
BLU
HUMIDIFIER HUMIDISTAT
115V FIELD WIRING
FAN TYPE UNITS ONLY
115V
FIELD
WIRING
TRANSFORMER
(FIELD SUPPLIED)
RED
BLU
24V
—4—
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