LASKO 900L Humidifier Owner’s Manual
- July 12, 2024
- Lasko
Table of Contents
LASKO 900L Humidifier
Specifications
- Model: LASKO 900L
- Intended Use: Furnace humidifier for forced circulation warm air furnaces
- Installation: Wall-mounted
- Power Source: Electrical
- Warranty: Limited Warranty
Product Usage Instructions
1. Installation
Before you start:
- A. Check the contents of the carton.
- B. Read the rules for safe installation and operation.
- C. Check for required tools.
- D. Follow the typical installation process.
- E. Determine the mounting location for the humidifier.
- F. If needed, convert the right-hand model into a left-hand unit.
- G. Prepare the humidifier for installation.
Mounting the humidifier cabinet:
Follow the instructions provided in the manual for mounting the cabinet securely.
By-pass air tube installation:
- A. Install the by-pass collar and air shutter as directed.
- B. Proceed with installing the by-pass air tube according to the manual.
Water supply installation:
- A. Connect the plastic tubing to the humidifier.
- B. Install the saddle valve to the water pipe.
- C. Connect the plastic tubing to the saddle valve.
- D. Ensure proper overflow drain connection.
Electrical installation:
- A. Install the transformer correctly.
- B. Place and connect the humidistat as instructed.
- C. Refer to the low voltage wiring diagram for proper wiring.
2. Humidifier Start-Up
- A. Install the drum and evaporator pad following the provided guidelines.
- B. Set the humidistat dial to the desired level.
3. Final Check-Up Before Commencing Operation
Ensure all installation steps are completed correctly before starting the humidifier for operation.
4. Routine Maintenance
Normal humidifier maintenance:
- A. Regularly clean and replace the evaporator pad.
- B. Clean the float valve assembly periodically.
- C. Perform summer shut down procedures when necessary.
FAQs
- Q: How often should I clean the evaporator pad?
- A: It is recommended to clean and replace the evaporator pad at least once a year to maintain optimal performance.
- Q: Can I use copper tubing instead of plastic tubing for water supply?
- A: Yes, you can use copper tubing as an alternative to plastic tubing; however, ensure proper fittings and connections are made according to instructions.
- Q: What is the warranty coverage for the LASKO Furnace Humidifier?
- A: The LASKO Furnace Humidifier comes with a Limited Warranty that covers specific components like evaporator pads and replacement parts. Refer to the warranty documentation for detailed terms and conditions.
INSTALLATION
BEFORE YOU START…
Take precaution when handling any fabricated metal, sharp edges can cause
serious injury. The following preparation should be done before you start your
new furnace humidifier installation.
A. CHECKTHECONTENTSOFTHECARTON Please refer to the repair parts illustration
on page 10 for parts identification. Inthe carton, you should find the
followingitems: r- 1 – 6″ flexible by-pass tube! item20 1
NOTE: On model 900L, metal collars are constructed on the flexible tube for
quick locking connections. On model 400L, two plastic ties are supplied for
the flexible tube to connect to the collars! item211
1 – air shutten ,tem 191
1 – by-pass tube collar. item181
-1 motor & plastic cap assem bly. ‘tem 29&6 1 -1 humidifier cabinet assembly, ‘teM U. 10& 261
1 – drum cage with evaporator pad, ‘tem2 &5 I 1 – humidistat assembly. Item8 1
1 – 120V/24Vtransformen ‘tem 71
-1 low voltage wire 20FT ion9 ,. item30 1
1 – 1/4″ plastic water tubing, 10FT.’ong” item17I 1 – water panl,tem3, 1 –
installation instruction t
1 – plenum and humidistat opening template t
1 – by-pass collar opening template t
1 – polybag contains the following hardware and
accessories
-1 saddle valve assembly ( item 9) -1 nylon compression nut (item111
1 – overflow drain fitting ( item 25 I
-1 rubber hole plug ( item27 I -1 humidifier conditioner t -1 conditioner’s instruction t
-1 black rubber ferrule I item 12 I
-5 -electrical wire fastening staples t
11 sheet metal screws t
1 – nylon ferrule! item 161
-2 brass insert I item 13 i
NOTE: 1. “t” – Parts are not shown on parts illustration. 2. If parts are
damaged or missing, please call our parts dept. toll free at
1-800-966-2028, Mon. thru Fri. between
the hours of Bam and 4pm EST. please do not return product to place of
purchase. Please quote model number of product when you call. 3. For questions
on installation please call our tollfree hot line at
1-800-465-7300.
B.READTHERULESFORSAFEINSTALLATIONAND OPERATION 1.Always shut the power OFF
before working on electric devices. 2. Shut OFF the water supply before
working on the humidifier. 3. All wiring and accessories (wire size,
insulation etc.) must satisfy national and local electrical codes. 4. Be
cautious of sharp edges during installation.
C. CHECK FOR REQUIRED TOOLS
– tin snips – utility knife . adhesive tape – pliers – electric drill – drill
bits (1/4″, 1/8″ and .104″) – medium sandpaper
– screwdrivers – adjustable wrench – hammer
– ruler or measuring tape
-level
D. TYPICALINSTALLATION Here are three frequently encountered types of
installation.
1. lO-BOY FURNACE (Fig.l) 2. HI-BOY FURNACE (Fig.2)
W.A.
la-BOY FURNACE
FIG.1 3. HORIZONTAL FURNACE (Fig.3)
R.A. HI-BOY II
r FURNACE !
FIG.2
HORIZONTAL FURNACE
~
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_ FIG.3
R.A.: Return (cold) air plenum
: Humidistat
W.A.: Warm air plenum
II : Humidifier
IMPORTANT: Humidistat must be upsteam of the furnace humidifier and a minimum
of 6 inches dis-
tance must be maintained for humidity sensing and control.
E. DECIDE THE HUMIDIRER MOUNTING LOCATION NOTE: 1. The humidifier should be
mounted on the return air
plenum with the by-pass tube connected to the warm air plenum. This is a
safeguard only, it can be mounted on either side, but you must make sure that
the evaporator pad
,-;.:;..; ~
1
~’~~
does not sight radiant heat from the combustion cham-
ber of the furnace. Radiant heat will cause the evaporator
pad to deteriorate. Available space and ease of installation will determine
which location to use. This humidifier can
be mounted on a minimum of 8″ wide plenum or duct. 2. The center of the by-
pass tube collar opening
must be approximately 13 inches from the humidi-
fier cabinet side panel (Fig.4). However, if the dis-
Approx. 13 inches
rl
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By.pass tube
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collar opening
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FIG.4
side. Using the nylon bearing as a pushing point. slide the bracket towards
the front of the cabinet until the bracket disengages from the rear tab. Pull
the bracket forward until the front of it is free of the front tab. (Fig.5) 3.
Position the bearing bracket over to the left side with the open portion of
the “U” shaped nylon bearing in the up position and insert the rear end of the
bracket into the rear tab to its limit. Next slide the front end of the
bracket into the front tab until the small circular boss snaps into the nest
hole. This locks and registers the correct position of the nylon bearing. 4.
Relocate the float valve assembly over to the right side of the cabinet. Be
sure to register the double “D” plas-
tic raised portion into the hole then secureit with the
nylon hex nut. (Fig.6)
.’ I:~’ ,,-
tance has to be more than 13 inches for your installation, an additional
length of galvanized pipe (not included)may be used to extend the by-pass tube
length. 3. 00 not mount the air by-pass tube and the plastic cap assembly to
the cabinet, until you know if it is going to be a left or right side
installation. 4. In order to prevent furnace or property damage, the
humidifier must be installed according to the manufacturer’s installation
instructions. Ifdamage occurs due to improper installation, the manufacturer’s
warranty is null and void.
F. CONVER11NGRIGHTHAND MODELINTO~ HAND UNIT
As shipped, the humidifier is a right hand model (By-pass tube connected to
the right side of the humidifier). Ifthe humidifier mounting location dictates
that the by-pass air tube must be on the left side of the humidifier, then
proceed with the following: 1. Remove the float valve assembly from the
cabinet. 2. The bearing support bracket must be relocated to the left
Nylon bearing
FIG.6
Relocating the float valve assembly from the left side of the
cabinet to the right side
5. From the parts bag, take out the double “0” rubber hole plug and insert it into the left side double “0” hole to prevent air leakage. The humidifiE?ris now ready for a left hand installation (By-pass tube connect to the left side of the humidifier).
G. PREPARINGTHE HUMIDIRER FOR INSTALLAll0N
1. Mount the motor & plastic cap assembly onto the humidifier cabinet.
Note: Be certain that this sub-assembly is mounted to the proper side of the
cabinet for your specific installation.
2. Mount the overflow drain fitting onto the bottom of the humidifier cover
by inserting the tail of the fitting into the double “0” shaped hole in the
cover bottom. Using a coin
or a screwdriver, turn the fitting one quarter turn (90°) in either direction
to bind it onto the cover. (Fig.7)
@’-
Bearing support bracket
o
Ofitvtienrgflow drain~
L Humidifier cover bottom
FIG.S
FIG.7
2
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MOUNTING THE HUMIDIFIER CABINET
Foryour convenienceand simplicityof installation.a combination plenum opening
template, which includesthe locationof the humidistat control, is supplied. To
install the humidifier cabinet
CAUTION: If you have central air-conditioning take precautions not to damage
the evaporator coil while drilling and cutting. The evaporator coil is
generally installed just above the furnace in the warm air plenum.
1. Use adhesive tape (not supplied) to affix the template on the plenum.
2. Drill the marked holes on the template. 3. Drill a 3/8″ hole inside the
marked rectangle. Use this hole as a
starting point for cutting opening. 4. Mount the humidifier cabinet on the
plenum with (8) sheet
metal screws supplied. NOTE: 1.The humidifier should be level from side to
side
and from front to back. 2.Existing air conditioning coil or electronic air
cleaner
may dictate the template location.
For Model 400L:
1. Slide the by-pass tube over the flanged collars of the humidifier and the
by-pass tube collar.
2. Usethe two plastic ties provided to tighten the bypass tube onto the
collars.
Note: The mounted by-pass tube should be straight _ not sagging.
WATER SUPPLY INSTALLATION
IMPORTANT: Connect the tubing to the humidifier FIRSTbeforeconnecting to the saddlevalve.
A. CONNECTING THE PLASTIC WATER TUBING TO THE HUMIDIFIER
1. Sand the plastic water tubing end
(Approx.1-1/4″) with medium sandpaper (not provided) in a rotating motion.This assures a
Approx. ,., ,i”
–
BY-PASS AIR TUBE INSTAllATION
A. INSTAWNG THE BY-PASS COU.ARAND AIR SHUTTER 1.Attach the by-pass tube
opening template to the other plenum. The center of the by-pass tube opening
must be approximately 13 inches from the humidifier cabinet side panel. Note:
Leveling of the by-pass tube is not necessary but preferred. 2. Drill 3 holes
and cut the circular opening according to the template. 3. Mount the by-pass
tube collar and the air shutter to the plenum with 3 sheet metal screws
supplied. Note: Air shutter should be mounted in the open
r-
—r <t
L Plastic water tubing
(
.~
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Sand in a rotating motion FIG.9
non-slipping, trouble free connection. (Fig.9) 2. Slide the nylon compression
nut and the black rub-
ber ferrule onto the sanded plastic tubing and then fit the brass insert into
the end of the plastic tub-
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Airshutter in
open position
!
Black rubber terrUI
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———–
FIG.S’
position. (Fig.S)
B.INSTALLING THE BY-PASS AIR TUBE For Model 900L: 1. Line up the 4 lugs on the
collars with the 4 matching slots on the by-pass tube ends.
2. Slide and clip the by-pass tube ends onto the flanged collars.
.4
L Nylon compression nut
FIG.10
ing. (Fig.1 0)
3. Push the plastic tubing firmly into the humidifier float
valve threaded water inlet. Carefully begin tightening the threads by hand.
Use an adjustable wrench to finish tightening the nylon compression nut onto
the float valve. Do not over-tighten. Note: The optimum tightness of the nylon
com-
pression nut will leave a gap of approximately 3116″ between the nylon
compression nut and the nylon hex nut. (Fig.11)
~”‘”‘”‘””””oII1’1″:”
3
-,Leaves a gap
Approx. 3/16″
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L Nv,onhexl,
nut
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Nylon com
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nut
pression “I,r-
FIG.11
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Float valve assembly
”
onto the sanded plastic tube and fit the brass insert in the end of the
tubing. (Fig.12) 4. Push the tubing firmlyinto the saddlevalvethreaded water
outlet. carefully begin tightening comperession nut by hand (Be careful not to
cross the threads). Use an adjustable wrench to finish tightening the brass
compression nut. Do not over-tighten.
D. OVERFLOW DRAIN CONNECTION
We strongly recommend you install a drain pipe to protect your property in
case of water leakage. This overflow fitting should be connected to a drain by
pushing an inside diameter of 1/2″hose over it or an ouside diameter of
1/4″plastic tubing into it (Fig.13!. Make sure the hose has the proper slope
for drainage when you finish the installation.
B. INSTAlliNG THE SADDLE VALVE TO THE WATER PIPE The water supply for the
humidifier is provided from an existing cold water pipe by using a self-
piercing saddle valve. In order for you to use the supplied plastic tubing,
select the nearest cold water pipe suitable for saddle valve installation.
1. Turn the main water supply off. 2. Rotate the valve handle so that the
piercing pin does not
protrude down beyond the top clamp. 3. With the rubber gasket in the fixed
position, clamp the
saddle valve on the selected location of the cold water pipe and mount the
bolts and nuts to the saddle clamps. Note:Make sure that the bolts and nuts
are not in the way
of handle operation. 4. To pierce the copper pipe, simply turn valve handle
clock-
wise until you feel that it is firmly seated. (Fig.12) Note: Do not open the
valve now. Proceed with the
mounting of the plastic tubing to the saddle valve first.
Rubber gasket
C. CONNECTING THE PLASTIC TUBING TO THE SADDLE VALVE
1. Cut the plastic tubing with a sharp knife to the proper length to fit
between the humidifier and the saddle valve.
2. Sand the plastic water tubing end (Approx.1-1/4″ ) with medium sandpaper
in a rotating motion. (Fig.9)
3. Slide the brass compression nut and nylon ferrule
n
]~ Pushtoconnect ..
-/’
/
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rf
1/2′ hose or 1/4″ plastic tubing
FIG.13
Note: The drain hose is not supplied with the unit, you may purchase the hose from a local plumbing supply store.
ELECTRICALINSTALLATION
A. INSTAlliNG THE TRANSFORMER
. CAUTION: Turn the electric power OFF at the main electric panel before you
work on the transformer installation.
The step down transformer (120V to 24V) can be mounted on any conveniently
located electrical outlet box which has a CONSTANT 120V power supply.
(i.e.,power can not be switched OFF by any other switch such as lighting, fans
etc.)
1. Select a conveniently located electric outlet box. 2. Open the outlet box
cover and remove one of the
knock-outs on the outlet box by using a screwdriver or pliers. 3. Remove the
locknut of the transformer and then insert
the wire leads and threaded portion of the transformer into the knockout of
the electrical outlet box. (Fig.14) 4. Install the locknut to lock the
transformer onto the electrical outlet box.
5. Connect the transformer lead wires to the power source. (One lead connects
to the black wire and another lead connects to the white wire.)
6. Replace the cover of the electrical outlet box.
4
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Note: Some transformer models are grounded by the transformer body & transformer lock nut & electrical box outlet. other transformer models have a green wire.
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120V constant power supplv
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-Transformer
L L Electricaolutletbox Transformer locknut
FIG.14
B. INSTAWNG THE HUMIDISTAT
Caution: Turn the electric power OFF at the main
electric panel before beginning humidistat installation.
This humidifier is equipped with an exclusive universal humidistat which can
be either wall mounted as fur-
nished or, with a few minor changes, be mounted on the return (cold) air
plenum or duct. Either wall mounting or plenum (duct) mounting works equally
well for humidity sensing and control. Wall mounting provides easy access to
adjust the humidistat setting since it is located in the living area. Plenum
(duct) mounting provides a simple installation (y’ou’do not have to fish the
low voltage wire through the wall. In some cases, it may be difficult to fish
the wire thru the wall).
Select either wall mounting or duct mounting for your humidistat. If you
decide to mount your humidistat in the living area (wall mounting), then
proceed with the following: Wall mounting: 1. Your humidistat is furnished in
the “wall mounting”
mode, no changes to the humidistat are necessary. because the circuit is low
voltage (24V), no switch box is required. 2. Select a location about five'(5)
feet above the floor on an inside wall where “normal” air circulation f!xists.
(In most residential installations, the humidistat is installed
near the heating thermostat for easy adjustment and wiring). 3. Drill a small
hole in the wall and then fish the low volt-
age wire out thru the hole. Leave approximately 6 inches of the low voltage
wire leads outside the hole for humidistat connection.
4. Remove the cover plate from the humidistat and you will see four holes at
the corners of the base plate.
900 wire termonals for low “” voltage wire connections
‘: ‘::::::….
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Four 14) screw
for mounting s provided
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to thae wall
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se plate
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“~Control Ia bel Cove “.,
FIG.15
Mount the humidistat on the wall using the four (4) 1″ long screws provided.
Make sure it is level and the low voltage wire is coming out thru the 3/8″
hole on the base plate. (Fig.15) 5. Strip the low voltage wires and make
connections to the humidistat using the two 90° wire terminals provided.
Replace the cover plate. 6. Remove the paper backing from the control label
and apply the label onto the face of the plate. 7. Install the knob onto the
humidistat control shaft.
Plenum (duct) mounting:
1. As shipped. the humidistat is ready for wall mounting. You must first
convert the humidistat from wall
mounting to plenum (duct) mounting. The control mechanism must be in the air
stream in order to sense
and control the humidity. To convert to plenum (duct) mount: (a) Remove the
cover plate and discard it. (b) Remove the control mechanism from the base
plate by removing the two holding screws at the
Control mechanism holding screws
Note: 1, Discard the cover plate,
2, Control mechanism must be in the air stream to sense and control the
humid.ty,
FIG.16
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back, and then, turning the control mechanism 180< upside down to allow the
shaft to protrude out
through the 1/2″ hole on the base plate (Note: base plate remains in the same
position and only the control mechanism is turned). (Fig.16) (c) Replace the
two screws to hold the control mechanism to the base plate. 2. Use adhesive
tape (not provided) to affix the humidistat opening template to the pre-
selected location and then drill four holes and cut the plenum as outlined on
the template.
3. Connect the low voltage wire to the humidistat by using the two (2) 90<
wire terminals provided.
4. Mount the humidistat onto the return (cold) air plenum by using the four
(4) 1″ long sheet metal screws provided. (Note: a small rectangular notch at
the bottom of the base plate is provided for the access of the low voltage
wire to the humidistat wiring terminals.)
5. Remove the paper backing from the control label and apply the label onto
the face of the base plate.
6. Install the knob onto the humidistat control shaft.
IMPORTANT: The humidistat must be upstream of the humidifier and a minimum
distance of 6 inches must be maintained.
(Refer toTypicallnstaliation, Fig.l,2 & 3.)
C. LOW VOLTAGE WIRING DIAGRAM This humidifier uses a 24 Volt drum motor to turn the evaporator pad in the cabinet. The motor is controlled (ON or OFF) by the humidistat. The power source for turning the motor is the 24 volt side of the transformer. Once you have mounted the transformer and the humidistat in place, the low voltage wire connection is accomplished as follows: 1. The humidifier motor lead wire has two(2) push-on female connectors and the 20 foot low voltage wire has two(2) push-on male connectors. Connect the , female to the male connectors first and then run the low voltage wire to the transformer. 2. At the transformer, carefully cut the insulation between the two conductors and separate them approx. 3″. (Fig.17)
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Cut the middle and separate approx. 3″
FIG.17
Low voltage wire set
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one of the
conductors and stnp the ends.
<:::::.
FIG.18
-::::-_. L Low v.oltage
wire set
3. Cut one of the conductors and strip the insulation from both ends (Fig.18)
4. Connect the newly stripped ends to the transformer low voltage
LOADterminals. (Fig.19)
l$~ LOAO
— -‘-‘-‘ ~sv 12VA
—–..-. FIG.19
‘iransformer
.,;- Lowvoltage J!:. wire set
5. Run the low voltage wire to the humidistat. Separate the ends of the conductors, strip them and connect to the humidistat terminals. (Fig.20)
.——–_.-
r Electrical outlet box
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Connect to 120V constant power supply
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I Humidistat I
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—-
v-. 24 Volts
Load side-=~’
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L Low voltage wire
~ :I 24 Volts motor
FIG.20
HUMIDIFIER START UP
Caution: 1. Make sure that all the components are securely installed before
you start up your humidifier.
~~t~l~ng
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Ear lug
Steel shaft
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Ear lug closer ! ….
totnesnaft endUnsertthis
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Ear IU~r~~~; :;,’:1~~~~~~se” ~~~n oearlngi
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.I L ‘:fu Nylon bearing
Mow L”m
dO”””‘
FIG.21
Note: Insert the ear lug into the motor coupling first and then push the other
end of the shaft to seat inside the
nylon bearing.
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2\. Remember to replace the water pan before
you open the water supply. A small arrow on the
water pan shows how it should be inserted. A.INSTALLING THE DRUM AND
EVAPORATOR PAD
A steel shaft in the center of the drum & evaporator pad
assembly is used to connect to the motor coupling and
the nylon bearing (Fig.21). The ear lug that is closer to the shaft end is the
end to be inserted into the motor coup-
~
ling. Connect to motor coupling first and then push the
other end of the shaft down to seat inside the nylon bearing.
Caution: Do not rotate the drum by hand once it is
seated inside the motor coupling. This may
damage the gears in the motor.
Loosen one screw and men slide the shutter to open or close
B. ADJUSTING THE WATER LEVEL
Turn on the water supply at both the main water supply and the self-piercing
saddle valve. Check to see if water leaks at any joints. If there is a
leakage, tighten the com
pression nut to correct the problem. Water should flow gently into the water
pan. If it flows too slow or
too fast, adjust the self-piercing saddle valve. The water level is adjusted
by altering the height of the float. This is done by rotating the knob of the
valve seat. Adjusting the float in such a way that it closes the automatic
valve when the selected water level has been reached. The maximum
water level in the pan should not exceed 1/2” from the top of the water pan.
(Fig.22)
FIG.23
D. HUMIDISTAT DIAL SETTING Although a relative humidity environment of 45-50%
may be desirable, setting your humidistat at this point when the outside
temperature is below 30:F can cause condensation on windows and walls.
Continued condensation for extended periods of time may result in structural
damage. Use the following chart. or the one on the humidistat as a guide for
maximum dial settings for various outdoor temperatures. If condensation forms
at these suggested settings, reduce the humidistat setting by successive 50/0
increments.After eachreduction in setting allow 6 hours for equilibrium to be
reached before further re-adjustment. If condensation persists with
progressively lower settings made during a 3 day period. turn off water supply
at saddle valve. turn humidistat to “OFF” and consult your heating dealer.
When your house is unoccupied for longer than 3 days during the winter always
set the humidistat down to 15% so that severe weather during your absence will
not result in condensation which might cause damage in your home.
AT OUTSIDE
0
TEMPERATURE ‘F
-20 I .10
SSETTAYTOAUTR HUMIDI’I
15%0 I
0 20″1<
25%
.20 +10 I
ABOVE -32
40’O
30% I 35%
FIG.22
C. ADJUSTING THE BY-PASS. AIR FLOW Sometimes there can be a static pressure
differential that may causean excessof air to by-passfrom one plenum to the
other through the humidifier ,causing less airflow through the distant heat
outlets in the house. It may also blow water off the evaporator pad. In either
case the shuttershould be gradually closed until the condition is corrected.To
close the shutter, simply loosen one screw and slide the shutter under the
collar flange and replace the screw. (Fig.23)
FINAL CHECK-UP BEFORE COMMENCING OPERATION
1\. Carefully check that both ends of the water tubing are firmly held in
place in the compression fittings. Pull slightly on
Cover
Match the slots
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FIG.24
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both ends of tubing. The tubing should not move at all. 2. Check to see that
the water level in the water pan is at the
right level and the float closes the valve completely. 3. Make sure that there
is no water leakage before leaving the
installation unattended. 4. Put the cover back on the humidifier. (Fig.24)
Note: The humidifier drum will turn very slowly.( 1 revolution
per minute)
#### MISCELLANEOUS INFORMATION
A. UNDERSTANDING HUMIDITY 1. Measuring the humidity level is possible with a
device called a hygrometer. However. only a precision hygrometer can give you
an accurate reading. 2. The humidity level goes down if the air in the house
is frequently replenished. There can be many causes of air leaks such as
fireplace damper left open, operation of kitchen or bathroom fan or a
constantly running heat recovery ventilator etc. 3. Humidifying all of the air
in a house may take some time, depending on the original dryness level in the
house. Some parts of the house such as carpet or furniture will absorb the
humidity before a measurable result is reached. 4. An approximate measure of
humidity level. during the winter can be done by examining your windows. If
your windows are misted or fogged up and there is nothing obvious causing it
(for example: bath, shower, cooking ), then there is too much humidity in the
house. No mist at all could indicate a lack of humidity. A slight mist around
or in the corners of the windows indicates that the humidity level is about
right for your comfort. (Note: Mist may never form on thermopane windows or
when storm windows are used. This is because the inside pane is “insulated”.
In this case look at the corners or the edges.)
C. CONNECTING THE TRANSFORMER TO INTERLOCK WITHTHE FURNACE BLOWER
You may wish to interlock the operation of the humidi-
fier motor to the furnace blower. The wiring diagram shown on Fig.26 is
applicable only if your furnace is equipped with a single speed motor. DO NOT
connect to a furnace with a two or three speed blower motor, otherwise, the
transformer will short out in a very short period of time. Caution: The
transformer may only be wired to a
blower motor operating at 120V. The transformer will short out if wired to a
220V circuit.
If you are not familar with the furnace wiring diagram. DO NOT use this
method.
Furnace power supply
120V
~
Line ~
Neutral
,~ Transformer
I t Fan
,
= control
~/ ~jl 24 Volt side
I~JJ
l ~ / ‘. . ‘>?’../
~/
‘ –
1 – Furnace control
F(Suo.nrgnleacsepbeleodw,e1r2m0o’toonbrIoyxl casing
FIG.26
B. USING COPPER TUBING INSTEAD OF PLASTIC TUBING
You may wish to use copper tubing instead of plastic tubing for the water line
connection. To do so, you will have to replace the nylon ferrule with a brass
ferrule in the saddle valve. Furthermore, it is not necessary to fit the brass
insert into the ends of the copper tubing for the humidifier and saddle valve
connections and do not sand
the ends of the copper tubing. (Fig.25!
To saddle valve
8
Brass ferrule (suppliedl
r
Brass compression nut
,I
Nylon com. pressIon nut
t~ I
~o
L 1/4″ Copper
tubing
humidifier
lBlack
rubber
ferrule
FIG.25
–
i’)InII: ~””””‘~’A.
#### ROUTINE MAINTENANCE
NORMAL HUMIDIFIER MAINTENANCE
Caution:
1\. Turn off the water supply and eleCtiic:J1 power before you do any
maintenance wcrk.
2\. Do not try to stop or rotate the drum by hand.
This may cause permanent damJge to the drum motor.
The evaporator pad should be replaced at least once per heating season. The
water pan and the float valve should be thoroughly cleaned at least once a
year. Depending on the mineral concentration in your water, a more frequent
cleaning may be necessary. Special water treatment conditioners aie available
at your store. They prevent the mineral contents in the water from depositing
on the humidifier parts. This will make the cleaning process much easier. We
highly recommend the use of such product.
A. CLEANING OR REPlACING THE EVAPORATOR PAD Use on Iv manufacturer brandname
reDia cement
evaporator Dads or vou will void your warrantv. This new drum design features
an instant release and locking action for replacing and servicing of the
evaporator pad. To remove the evaporator pad from the drum, proceed as
follows: 1. Hold the drum assembly in a horizontal position and
pull the bushing out with your fingers. (Fig.27)
—————
.. DrumShaftJ
4
Diskflange)
Stop IU~
———-…
– — ‘
FIG.27
~.Pull out
‘- Bushing
2\. Place your thumb and forefinger around the neck of the float as shown in
Fig.28
3\. Squeeze firmly. This will disengage the two pivot pins from the holes at
the sides of the valve jet shield and release the float.
4\. The valve seat and the knob can then be pulled off the spigot.
5\. When replacing the seat be sure that it is pushed down as far as it will
go onto the float.
/~
Knob
.”
‘….
/t_
~
..! ~
/
. Valve jet-‘
,<t ‘1 / <t
‘.
shield Pivot pin-/
/
Squeeze here
”
{neck)
Valve seat Seigot
/._ Fioat
FIG.28
C. SUMMER SHUT DOWN Normally during summer season, the humidity level in the
air is quite high. Therefore it is advisable to shut off the humidifier
system. To prepare for the summer shut down, proceed with the following: 1.
Close the water supply at saddle valve. 2. Turn the humidistat knob to the
“OFF” poisition. 3. Empty and clean the water pan. Note: The water pan ean be
taken out without removing the float valve or even if water is inside the
water pan. Simply move the water pan forward and take it out from the bottom
of the humidifier. 4. Close the air shutter.
2\. Slide the evaporator pad off the drum cage. To replace the pad: a. Keep
the bushing in the extended position and slide the evaporator pad over the
spokes until it is against the disc flange. b. Push the bushing back along the
shaft to the stop lugs.The evaporator pad is now locked into position.
B. CLEANING THE FLOAT VALVE ASSEMBLY AND WATER PAN The float valve assembly
and the water pan can be cleaned by using a solution of 50/50 water and
vinegar. To remove the float from the valve jet shield, proceed as follows: 1.
Turn off the water supply.
#### REPAIR PARTS ILLUSTRATION
Note: Use only manufacturer brandname
evaporator pads and replacement parts or your warranty is void.
,
Go
~1
ITEM
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
PART NO. .
01A900939 01A900914 01A060214 01A900163 01AOl7256 01A 172134 01AOO0201
01AOO0806 OPB132055 02A900905 060010801 01A010816 01A930041
.060011142
DESCRIPTION
CABINET DRUM CAGE WATER PAN COVER EVAPORATOR PAD 90’S-L DRUM MOTOR 111788
TRANSFORMER H,IMIDISTAT SADDLE VALVE FLOAT VALVE ASSEMBLY NYLON COMPRESSION
NUT RUBBER FERRULE BRASS INSERT NYLON HEX NUT BRASS COMPRESSION NUT
ITEM.
16 17 18 19 20 t 21 22 23 24 25 26 27 28 29 30
PART NO.
*
01A930040 01A 172107 01A170929 01A 118810 010798000 01A 170925 01A131810
01A900911 01A006911 01A 131725 01A 131720 20221 01A900902 01A008116
DESCRIPTION
NYLON FERRULE 1/4″PlASTIC WATERTUBING(10FT.LONG! BY-PASS TUBE COLLAR AIR
SHUTTER 6″ FLEXIBLE BY-PASS TUBE PLASTIC TIE BEARING SUPPORT BRACKET NYLON
BEARING DRUM SHAFT OVERFLOW DRAIN FITTING WINDOW RUBBER HOLE PLUG FOAM SEAL
PLASTIC MOTOR MOUNTING CAP LOW VOLTAGE WIRE (20 FT. LONG)
NOTES:
1\. THIS IS A PARTS LIST, NOT A PACKING UST. IT IS FOR THE PURPOSE FOR
ORDERING THE REPAIR PARTS. 2. * PART NO. NOT AVAILABLE, USE THE “DESCRIPTION”
TO ORDER. 3. t SOME MODELS HAVE A METAL CONNECTION COLLAR. HENCE THE PLASTIC
TIES ARE NOT SUPPLIED.
10
-y.~
PART NO. 060900018 Issueo: Mav,2′” 1994
#### References
* [ Repair Your Grill: Shop Replacement Parts for 24,880 Models](https://www.appliancefactoryparts.com "Repair Your Grill: Shop Replacement Parts for 24,880 Models")
* [ Lasko Humidifier Parts - Select From 20 Models](https://www.appliancefactoryparts.com/humidifiers/lasko/ "Lasko Humidifier Parts - Select From 20 Models")
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