—3—

Fig. 4—Saddle Valve

Fig. 5

•
On a Model HUMBBLBP or Model
HUMBBLFP humidifier, loosen the
thumbscrew that holds the distributor
cover to the top of the cabinet. Lift up the
distributor cover slightly to make certain
that water is flowing from the solenoid
valve into the distributor pan. Do not lift
the cover off the cabinet more than 1 in.
when water is flowing. (See Fig. 6 or 7
according to the model you own.)

Fig. 6—

Model HUMBBLBP2018-A--

•
On a Model HUMBBSBP humidifier,
gently pull the latch that secures the
access door. Remove the door. Check to
see if water is flowing from the solenoid
valve into the evaporator pad. (See Fig. 8.)

•
On a Model HUMBBSFP humidifier,
open the side door or the front cover. If the
front cover is opened, hold the pad assem-
bly in place. Check to see if water is flow-
ing from the solenoid valve into the
distributor pan. (See Fig. 9.)

•
On a Model HUMBBWTR unit, look
through the window on front of the unit to
see that the evaporator pad is rotating and
water is flowing. (See Fig. 10.)
The Model HUMBBWTR is controlled
by a float valve. Turning off the furnace
will not affect the water flow until float
level is achieved. (See Fig. 11.)

Fig. 7—

Model HUMBBLFP1025-A--

Fig. 8—

Model HUMBBSBP2017-A--

Fig. 9—

Model HUMBBSFP1016-A--

4. Turn off the furnace. When the
blower stops, look into the humidi-
fier to make sure the water is not
flowing into the unit.
5. Replace the cover assembly and
fasten securely.
6. Now, turn the furnace on and set
the thermostat for desired room
temperature.

SHUTDOWN PROCEDURES

To shut down your humidifier, close the
saddle valve on the water line. Then turn
off the humidistat. When set to the OFF
position, the humidistat shuts off the
electrical power to the solenoid valve on
the humidifier.
NOTE:
If your home comfort system in-
cludes cooling, be sure the water supply
to your humidifier is
turned off
during
the cooling season. Close the damper
located in the bypass duct if one is
installed. If your humidifier is a Model
HUMBBWTR, drain and clean the water
pan as described in cleaning procedures.

PERFORMING ROUTINE MAINTENANCE
With the proper maintenance and care,
your humidifier will operate economi-
cally and dependably. Maintenance can
be accomplished easily by referring to
the following directions. However,
before performing any maintenance,
consider these important safety
precautions:

•
DISCONNECT ALL ELECTRI-
CAL POWER TO THE HUMIDIFIER
AND FURNACE BEFORE PER-
FORMING ANY SERVICE OR
MAINTENANCE TO AVOID PER-
SONAL INJURY.

Fig. 10—

Model HUMBBWTR2019-A--

NOTE:
THERE MAY BE MORE
THAN 1 ELECTRICAL DISCON-
NECT SWITCH.

•
ALTHOUGH SPECIAL CARE HAS
BEEN TAKEN TO MINIMIZE SHARP
EDGES IN THE CONSTRUCTION OF
YOUR HUMIDIFIER, BE EXTREME-
LY CAREFUL WHEN HANDLING
PARTS OR REA CHING INTO THE
UNIT TO AVOID PERSONAL INJURY.
Your humidifier has been designed for
easy disassembly to simplify cleaning
and servicing. Your unit must be kept
clean to maintain its efficiency.
HUMIDISTAT
SOLENOID VALVE
DISTRIBUTOR COVER
DISTRIBUTOR PAN
EVAPORATOR PAD
CABINET
BOTTOM ACCESS
PANEL
SOLENOID VALVE
DISTRIBUTOR COVER
DISTRIBUTOR PAN
EVAPORATOR PAD
CABINET
BOTTOM ACCESS PANEL
INLET
CABINET
DUCT HOUSING
RECTIFIER
DRAIN
SIDE ACCESS DOOR
EVAPORATOR PAD
DISTRIBUTOR PAN
SOLENOID VALVE
CABINET
FRONT COVER
SCREWS (4)
PAD ASSEMBLY
SIDE ACCESS DOOR
BEARING RETAINER
CABINET
PAD
PAN