4
SHUTDOWN PROCEDURES
To shut down your humidifier, close the saddle valve on the wa-
ter line. Then turn off the humidistat. When set to the OFF posi-
tion, the humidistat shuts off the electrical power to the solenoid
valve on the humidifier.
NOTE:
If your home comfort system includes 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 49WS, drain and
clean the water pan as described.
PERFORMING ROUTINE MAINTENANCE
With the proper maintenance and care, your humidifier will op-
erate economically and dependably. Maintenance can be accom-
plished easily by referring to the following directions. However,
before performing any maintenance, consider these important
safety precautions:
•
DISCONNECT ALL ELECTRICAL POWER TO THE
HUMIDIFIER AND FURNACE BEFORE PERFORMING
ANY SERVICE OR MAINTENANCE TO AVOID PER-
SONAL INJURY.
A95263
Fig. 10 — Model 49WS
NOTE:
THERE MAY BE MORE THAN 1 ELECTRICAL
DISCONNECT SWITCH.
•
ALTHOUGH SPECIAL CARE HAS BEEN TAKEN TO
MINIMIZE SHARP EDGES IN THE CONSTRUCTION OF
YOUR HUMIDIFIER, BE EXTREMELY CAREFUL WHEN
HANDLING PARTS OR REACHING INTO THE UNIT TO
AVOID PERSONAL INJURY.
Your humidifier has been designed for easy disassembly to sim-
plify cleaning and servicing. Your unit must be kept clean to
maintain its efficiency.
Regular inspection allows you to determine the cleaning sched-
ule best suited to your humidifier’s operating conditions. The
frequency for required maintenance will depend most upon the
available water supply. In areas where hard water and high min-
eral content are prevalent, more frequent cleaning and servicing
may be required.
At minimum, the humidifier will need to be cleaned at the be-
ginning of every heating season.
CLEANING PROCEDURES
Models 49BF, 49BG, 49FH, and 49FP
1. Turn off all electrical power to the humidifier and furnace.
2. Turn off the humidifier’s water supply. (See Fig. 4.)
3. Disassemble the humidifier.
•
To disassemble a Model 49BG humidifier, gently pull the
latch that secures the access panel. Remove the door and slide
the evaporator pad assembly out of the unit. (See Fig. 8.)
•
To disassemble either a Model 49BF or Model 49FH humid-
ifier, first remove the water supply connection to the solenoid
valve. Next, remove the screw that holds the distributor cover to
the cabinet, and lift off the cover. Disconnect the drain line from
the sump and loosen the thumbscrew(s) holding the sump to the
cabinet. Remove the sump. Remove evaporator pad assembly.
(See Fig. 6 or 7, according to the model you own.)
•
To disassemble a Model 49FP, the pad assembly can be
removed from the side access door or the front cover. When
removing the side door, lift the pad assembly up by holding the
tabs and slide the assembly out. When removing the front cover
on Model 49FP, disconnect the quick connects to the solenoid
valve, unscrew the 4 screws to the front cover, snap loose the top
and bottom catches, and lay the front cover aside. Once the front
cover is off, lift the pad assembly up and twist it out. The pad
assembly consists of 4 parts; the distributor pan, frame, sump,
and the evaporator pad. Pull the distributor pan apart from the
frame and the evaporator pad can be removed. Do not force the
evaporator pad in or out without removing the distributor pan as
this will distort the pad.
4. Clean the humidifier’s external components.
•
If your humidifier is a Model 49BG humidifier, wash the
access door and outlet drain portion of the cabinet. Make sure
the drain is open.
•
If your humidifier is a Model 49BF or 49FH, wash the distrib-
utor cover, sump cover, and cabinet. Be sure the inlet ports are
open and clean. Then, clean the sump with a solution of deter-
gent and water.
5. Clean the internal components of your humidifier. Wash the
distributor pan with a mild detergent and warm water. Be
sure holes and slots in the pan are clean and unobstructed.
Wash the evaporator pad assembly in a detergent solution.
If there are scale deposits on the pad, soak it in ordinary
household vinegar. If the pad is covered by a heavy deposit
of scale, or if the local water supply has high sulfate or cal-
cium content, replace the pad with a new one. Contact your
dealer for replacement part.
6. Reassemble your humidifier.
7. Turn on the electrical power and water supplies. Refer to
the startup procedures.
Model 49WS
1. Turn off all electrical power to the humidifier and furnace.
2. Turn off the humidifier’s water supply. (See Fig. 4.)
3. Drain water from the unit. Place a pail underneath the drain
plug located on the bottom of the humidifier cabinet. Lift
the tab on the drain plug and remove the plug. Allow all
water to drain from the unit. (See Fig. 12.)
4. Remove the front door from the humidifier. Rotate the
latches one-half turn, then pull the door forward.
BEARING RETAINER
CABINET
PAD
PAN
