DO-IT-YOURSELF CHECK LIST

If you feel the following operations are within your skills, you should have no difficulty installing this humidifier.

I Cutting and drilling sheet metal.

Using hand tools: screwdriver, wrench, etc.

I Hooking up low voltage electrical connections.

SEARS INSTALLATION POLICY

All installation labor arranged by Sears will be performed in a neat, workmanlike manner in accordance with generally accepted trade practices. Further, all installations will comply with all local laws, codes, regulations, and ordinances. The customer will also be protected, during installation, by insurance relating to property damage, Workman's Compensation, and public liability.

You must realize that the wrong use of any tool can be danger- ous. Be sure you know how to use the tools and equipment to avoid any possible hazards. If you have any doubt we ask that

you contact your Sears salesperson. They will arrange for profes- sional installation.

SEARS INSTALLATION WARRANTY

in addition to any warranty extended to you on the Sears mer- chandise involved, which warranty becomes effective the date the merchandise is installed, should the workmanship of any Sears

arranged installation prove faulty within one year, Sears will, upon notice from you, cause such faults to be corrected at no addi- tional cost to you.

before you start

RULES FOR SAFE INSTALLATION & OPERATION

10.To prevent over humidification, humidifier must not be oper- ated above humidistat high position or above the +20

position (whichever applies) except briefly to test op- eration after installation or servicing.

TOOLS AND MATERIALS

???Safety Glasses

???Straight edge ruler Pencil or grease pencil Hand drill or grounded electric drill

Drill bits, 5/32", 1/8"

???Tin snips or metal cutting saw

NEEDED

???Screwdriver (flat point, medium size)

???File

???Level

???Hammer

???Small adjustable wrench

???Center punch

Humidity can be puzzling, it cannot be seen, heard, touched, smelled or tasted. Many people do not understand what a humidi- fier will or will not do.

Probably the best way to judge whether the humidity is too high, too low or about right is to watch your windows. If they are heavily fogged you most likely have too much. If there is no moisture on

them at all, especially in the corners, you have too little. (NOTE: Moisture will not normally form on thermopane or when storm win- dows are used.) If there is some moisture in the window corners and along the edges, the humidity is just about right. This is a good rule of thumb if you do not have an expensive piece of testing equip- ment. Your comfort is another good check.

TYPICAL QUESTIONS ASKED

1.Why do moisture requirements vary from home to home?

Requirements depend on the amount and dryness of air to be humidified. The larger and more loosely constructed the home, the greater the quantity of moisture required.

2.How can I best check my home's relative humidity?

First give your humidifier time to build up the humidity to an acceptable level. Instruments are available to measure relative humidity, but from a practical standpoint, your comfort is the best guide. You cannot depend on table top or wall hung dial gauges.

3.How long will it take my humidifier to build up the humidity in my home?

Much depends on the outside temperature, time of year, home construction, and how dried out the home has become. In some cases, it may take a week or more.

4.What ere some of the common things that cause higher than average air leakage in the home, therefore causing low humidity?

A. Jalousie windows

B.Open fireplace dampers

C. Cracks around windows and doors

D.Open doors and windows

E.Unusually large attic or foundation vents F. Range hoods and bath fans

5.What else causes static shock besides low humidity?

Some types of carpets tend to create more static than others. While the proper humidity level will reduce the static level, it may not eliminate static entirely.

6.What is the safe humidity level for my home?

In order to determine the safe relative humidity for homes ex- posed to various low outside temperatures, NESCA* conducted tests and published recommended humidity levels for various outdoor temperatures. These are shown in the chart. These levels help prevent damage to your home such as water run- ning down the walls or even building up inside the walls.

The safe indoor relative humidity percentage is not a fixed num-

ber but will increase or decrease as the outdoor temperatures rise or fall.

*NESCA = National Environmental Systems Contractors Association,

selecting a location

Consider these points as you choose the location for your hu- midifier.

Locate humidifier on supply air plenum (Fig. 1) or return air

plenum. If the humidifier is installed on the return air plenum,

the flexible hose, round opening, is connected to the supply air plenum.

If furnace is equipped with air conditioning, humidifier should be mounted above or at slope side of "A" coil to avoid possible splashing (Fig. 2) of water in reservoir.

Humidifier should be installed so that if the humidifier or any other connections should leak, the resulting flow of water will not cause damage. Under no condition is Sears and the manu- facturer to be held liable for any water damage in connection with this humidifier. Never install humidifier in attic or crawl space where freezing may occur or leaking

type installation are available at Sears.

Return Air

Plenum

Furnace

Place Humidifier

Duct

Supply

Plenum

Air Conditioner Coil

inspection

If you require the bypass duct on the right (Fig. 4), remove parts as shown under Disas- sembly and start with A.

AS RECEIVED

(Left Hand Flange)

"-U

Bypass Duct

AS CONVERTED

(Right Hand Flange)

l l otor

disassembly

Remove front cover. Lift top cover to lock position. Pull pivot pin and remove float assembly from valve. Lift out media wheel.

Remove water reservoir.

MotorBracket

_ B Install motor bracket on left side. Make sure bracket

is firmly seated (Fig. 6).

Nylon

Lance

C Install wire support and nylon bearing in

lances. Be sure groove in nylon bearing is toward inside of humidifier. Bend that portion of the wire support leg ex- tending below the lance, outward, to lock support in lances (Fig. 7)

D After conversion, unit should look like (Fig. 8).

AFTER CONVERSION

Groove

Motor --

- Wire Bearing Support

Lances

installation (on sheet metal plenums)

FIBER PLENUM DUCTS

NOTE: The mounting screws supplied are for standard in- stallation on sheet metal plenum ducts. If you have fiber plenum ducts, install the humidifier and components with thru-bolts, nuts, and washers (not supplied). If necessary, reinforce the humidifier mounting area on fiber ducts with sheet metal and provide additional bracing as required to support the weight of the humidifier and water. (This fiber duct installation hardware is not supplied and must be pur- chased from your local hardware store.)

'4

IMark a level line on selected plenum at bottom lo- cation for humidifier.

NOTE: Unit must be installed level from left to right and I

Hold the humidifier housing against the plenum with the bottom edge on the level line. Mark location of the (3) holes and large rectangular opening (Fig. 9).

Level

Line

See Fig. 10 for clearance required to open top cover when re- moving media wheel for servicing. Cut opening with tin snips or saw and drill (3) 1/8" diameter holes as shown in Fig. 11.

CAUTION: DO NOT DRILL INTO AIR CONDITIONING COIL.

Duct or Ceiling

g" --._-_1

Top Cove r_/_

._._, / 5'_in. Clearance

Plenum ??

2 Mount the humidifier to the hot air plenum using the three screws provided. Bend the two tabs 180 ?? inward to seal the humidifier to the Plenum (Fig. 12).

Humidifier

With 3

Screws

Bend 2 Tabs -

Inward 180??

Screws (2)

If Necessary "_t

ar/

i 6 It is best to install an overflow line. Local codes may require overflow protection. The overflow is in the bottom of the reservoir (Fig. 15). Use 1/2" inside diameter plastic or rub- ber tubing to connect and route to nearby floor drain. (Tubing not furnished. Available at your local hardware store.)

NOTE: HUMIDIFIER MUST BE LEVEL FOR DRAIN TO I

Position collar at selected location. Mark center

opening and (5) holes. Cut out center opening and drill (5) 1/8" holes.

4 Attach collar and flexible hose to plenum. If addi- tional flexible hose is required an eight foot length is available through the parts department, order 281152-05. Before tight- ening screws, insert damper between collar and plenum (Fig. 13). it should be open for humidifier operation.

Damper Blade

(Slide shut before using

air conditioning. Slide open at

start of heating season.)

installation

WATER SUPPLY

J1 Water for the humidifier must be taken from a nearby

cold water line. Turn off the water supply. Drain by opening a faucet at a lower level of the line.

i J2 Position the saddle valve on the water line as close

to the humidifier as possible. You have been supplied with 10 feet of 1/4" plastic tubing.

SPECIAL NOTE: When measuring the distance from the saddle valve location to the humidifier, keep in mind that the tubing must be supported; therefore, it must run along

ceiling and walls. Measure along the path the tubing will follow.

;_1 Connect the flexible hose as shown using clamp pro- vided. Do not allow flexible tube to come within 3" of furnace flue pipe because of flue pipes extreme heat. If hose is under stress (pulling), it may be necessary to drill 2 holes in humidi- fier collar for screws. This will prevent clamp from slipping off (Fig. 14).

3 Back out the piercing pin by turning the "T" handle counter clockwise and then clamp the saddle valve body se- curely on the water line with rubber gasket positioned as shown (Fig. 16). On galvanized or copper pipe over 5/8", first drill a 5/32" hole.

CAUTION: For safety, use a hand drill or grounded electric drill.

Turnhandleclockwiseuntilithaspiercedthewater lineandvalveiscompletelyclosed(Fig.16).

, _ PartiallyuncoilthetubingSlidethebrasscompres.- sionnutoverthetubingThethreadsinthenutmustfacethe.

tubingend.Placethebrasscompressionsleeveasshownin

Fig. 16. Slip brass insert into end of tubing.

_ U Insert the tubing end into the saddle valve at threaded stem "A" (Fig. 16) as far as it will go. Thread the brass compression nut onto the valve, then tighten gently with a wrench. Take care not to overtighten the nut.

Brass

Compression Nut

NOTE: Wire bearing support must be bent slightly inward to insure snug engagement of media wheel with media motor. Adjust as required by bending wire slightly inward before installing media wheel. (Be careful not to overbend as too much tension may cause media wheel shaft to pop out of plastic bearing.)

1,1[_ U:!

Cover

Bend

Slightly _.

Inward

Water Pipe

.A,,

Rubber Gasket

(Stem Up)

MOUNTING SADDLE VALVE

7 Unwind the rest of the tubing. Take care not to kink it. Run the tubing along flat surfaces to the humidifier. Support the tubing as needed to avoid contact with furnace.

0

__ O Close previously opened faucet. Turn on main wa- ter supply. Place a pail under the end of the tubing. Open the

saddle valve. Flush the line. Make sure there are no leaks along the line or at the valve. Turn valve off.

11 Install float assembly. Place float assembly on valve

body; align hole. Slide pivot pin through holes to fasten. Float should have slight up and down movement (Fig. 19).

Operating Float \

Valve Button

Body

Pivot Pin

Complete installation of water supply by first sliding plastic compression nut onto the water supply tubing. Insert brass insert into the end of water supply tubing. Insert the tubing into humidifier valve body, making sure it is fully seated. Tighten plas- tic nut securely, finger tight (no wrench) (Fig. 17).

l=[_=_ilrd

Plastic Compression Nut

[ 12 Open saddle valve and allow reservoir to fill. Check water level (Fig. 20). If adjustment is necessary, turn off water and remove float assembly. See instructions on bottom of float. To raise water level, turn float clockwise viewing bottom of float. Water should be 9/16" below the top edge of the reservoir.

t--p,ost,o

WARNING:

BrassInsert MustBe Installed

10 Install reservoir, making sure overflow drain is on

left side. Install media wheel. Be sure that media wheel is prop- erly engaged with the media motor and that media wheel shaft is in groove in plastic bearing (Fig. 18).

3 Lower top cover. Install plastic front cover by inserting

top edge up under top cover front flange, with side flanges out- side casing. Swing bottom of cover in against case and lower down against flange.

humidistat

The humidistat is designed to mount on the cold air plenum of your furnace or on an interior wall of the home. The cold air ple- num, however is the preferred location for sensing the average humidity throughout your home. Select your location and follow the appropriate instructions.

NOTE: THE HUMIDISTAT AS SUPPLIED IS ASSEMBLED I

FOR COLD AIR PLENUM INSTALLATION (FIG. 21).

cold air plenum mount (F g21).

1 Select a location that is a minimum of 6" upstream

on cold air plenum (Fig. 22). Peel off paper backing and posi- tion template supplied, drill (4) 1/8" diameter holes and cut out center portion along solid line. Peel off backing and apply gasket material as indicated by dashed lines.

-_ 2 Remove knob and cover from humidistat. To remove

cover, place screwdriver blade in slot at side of humidistat and twist.

Position humidistat in opening and fasten with 4 screws provided.

_ 4 Install shaft extension. Install cover by snapping onto backplate. Press knob onto shaft extension.

Connect wiring (Fig. 24). Plug 24 VAC transformer into 120 VAC outlet.

_i 6 Peel off backing and attach the operating instruc- tion label onto the cold air plenum next to the humidistat.

wall mount (Fig.

r iI Remove knob and cover from humidistat.To remove

cover, place screwdriver blade in slot at side of humidistat and twist.

2 Convert humidistat for wall mounting by removing control unit from backplate. Reassemble control unit to backplate as illustrated in (Fig. 23) with spacers to rear and shaft forward. Remove electrical disconnect by cutting the (2) wires. Strip ends 1/2" for splicing to wall wire.

I NOTE: Shaft extension is not required for wall mounting.

i 3 Select a location on a convenient inside wall, usu- ally beside your furnace thermostat.

Run low voltage wire through the wall. Exit hole must be within the lower backplate opening. (Purchase additional wire as required.)

5 Connect low voltage wires from wall to previously cut leads on humidistat by stripping ends and using wire nuts (not provided). Position and fasten humidistat to wall with (4) screws provided. Install cover by snapping onto backplate. Press knob onto humidistat shaft. Make sure 1/8" air space is maintained between wall and backplate to allow air circulation and humidity sensing.

6 Connect wiring (Fig. 24). Remove electrical discon- nect by cutting wires on harness, strip ends and splice to low voltage wire from wall humidistat using wire nuts. (Wire nuts not provided. Purchase them from your local Sears Hardware Store.) Plug 24 VAC transformer into 120 VAC outlet. Do not use existing transformer on furnace.

NOTE: Humidifier humidifies only when furnace is on, I however, Media Wheel will turn whenever humidistat I calls for humidity.

NOTE: If the installation is being made in the sum- mer or when the humidity is high, turn knob to the test position and the humidifier should start. When your system is working satisfactorily, turn knob back to the minimum humidity setting until winter.

NOTE: By turning knob to the test position humidifier should start. (Do not leave on test.)

(4)

Cover-_

)_--Spacers

Control

Unit

Wall Mount

SPLASH INSIDE HUMIDIFIER:

This humidifier depends on the difference of air pressure between the supply air plenum and the return air plenum to propel air through the humidifier. Some furnaces have higher pressures than others. This could result in air travelling at high speed through the humidifier. This can cause droplets of water to be picked up and splashed against the inside of the humidifier case. Eventu- ally a coating of lime will build up. It could in extreme cases, cause leaking of water from the humidifier. If possible, operate the fur- nace blower at a lower speed.

TO REDUCE SPLASH:

Partially close the damper located in the collar on the return air plenum. Some experimenting may be necessary to find the proper setting.

AIR CONDITIONING - IMPORTANT:

If your furnace has air conditioning (cooling), close the damper completely during summer months and turn the humidistat to the Minimum Humidity setting. BE SURE TO OPEN DAMPER

DURING HEATING SEASON.

CAUTION:

Do not use tablets in an attempt to control lime de- posits in this humidifieH Use of tablets may cause

humidifier to splash causing damage to humidifier or furnace.

I NOTE: Make sure wall outlet is not controlled by a switch. I

operation

1 Set knob to the lowest temperature predicted for a 24-hour period. Because of differences in house construction you may want to try a higher or lower setting to achieve proper humidity.

'2 Change knob settings as outdoor temperature changes

Occur.

WARNING:

DO NOT LEAVE KNOB SET ABOVE "+20" OR HU-

MIDIFIER WILL RUN CONSTANTLY AND MAY OVER

HUMIDIFY YOUR HOME.

IF SWEATING OF WINDOWS OR WALLS

OCCURS OR IF AIR ISTOO DRY:

Check dial setting. Indicator should point to the lowest 24 hour temperature. If setting does not agree, readjust knob to proper number and wait 24 hours for sweating to stop. If dial setting was correct and conditions have not changed, rotate knob back and forth from TEST to MINIMUM HUMIDITY SETTING. If hu- midifier goes ON and OFF, control is operating properly.

maintenance

THIS HUMIDIFIER IS AN APPLIANCE THAT EVAPO-

RATES WATER IN LARGE QUANTITIES.

The dissolved minerals normally found in tap water are left as lime deposits in the humidifier. REGULAR CLEANING is nec- essary to keep the parts free of lime deposits. Deposit build- up will reduce humidifier output. Ease of servicing has been foremost in the design of this humidifier, Service at least every

(4) four weeks during the heating season or more often de- pending on the water conditions.

1.Unplug transformer.

2.Close saddle valve.

3.Remove the front plastic panel and lift up top hinged cover.

4.Pull out pivot pin and remove float and float arm.

5.Lift out the media wheel and reservoir.

6.Pour contents of reservoir down the drain.

7.Clean lime from all parts using a solution of vinegar and wa- ter, detergent and water, or Sears All-Purpose Humidifier Cleaner (Stock No. 42-14713).

8.Remove media pad from inside of wheel and clean thor-

oughly, replace if necessary (Sears Stock No. 42-14603). IMPORTANT: Stretch new media length- wise before placing in wheel.

9.If the Reservoir has been overflowing, the operating Float Valve Button may be worn. Remove the operating Float Valve Button, turn it over and reinsert or replace after both surfaces are worn (see page 10, Fig. 25).

10.Reinstall reservoir, media wheel with pad, float and pivot pin.

11.Open saddle valve and check water level in reservoir. Adjust float as required.

12.Close top metal hinged cover and replace front plastic cover.

13.Plug in transformer.

14.Turn humidistat to "test" momentarily and check for media wheel rotation. Reset humidistat according to outdoor tem- perature as instructed on label and reinstall front cover. Unit is back in operation.

SUMMER SHUT DOWN:

Unplug transformer, close saddle valve, close bypass damper. (CLEAN PER ABOVE AND LEAVE RESERVOIR EMPTY.) As a reminder, you may want to put a tag or sticker on the unit indi- cating it has been shut down for the summer and will require start up in the fall.

FALL START UP:

Plug in transformer, open saddle valve, open bypass damper and set humidistat to TEST position. Check for proper water level and media wheel operation. Set humidistat according to outdoor temperature as instructed on label.

Float

Body

Pivot Pin

*Reverse button if it has not been used.

Replace with new button if both sides are worn.

SERVICING THE FLOAT

If the humidifier has been overflowing, the float valve button may be worn. This button will wear much like a faucet washer. To service:

1.Turn off water at saddle valve.

2.Remove float from humidifier (pull out pivot pin).

3.Service float as shown in illustration at left.

4.Reinstall, turn on water at saddle valve and test float.

Too little Humidity

1.Does humidifier need cleaning.

2.Is media wheel rotating?

3.Humidistat setting.

4.Water to unit.

5.Excessive air loss in house.

6.Is water level correct?

7.Is damper open?

1.Clean humidifier and clean or replace media pad and reservoir liner.

2.a. Clean or replace media pad.

b.Check to see if transformer is properly plugged in.

c.Inspect main fuse or circuit breaker.

d.Check to see if media motor is rotating.

e.Humidistat setting too low, turn knob clockwise to increase humidity.

3.Set for proper outdoor temperature - lowest 24 hour temperature.

4.Turn on saddle valve and check for possible obstruction in water line. Is water supply connected?

5.Close fireplace damper, seal around doors and windows.

6.Adjust float.

7.Slide damper out for winter operation.

1.Turn knob counterclockwise to decrease humidity.

2.May be a temporary condition caused by moisture from laundering, bathing, cooking, etc.

1.Level unit.

2.Service as shown in Fig. 25.

3.Adjust damper.

1.Tighten all fasteners.

2.A slight sound is normal as water enters humidifier.

3.Check clearance of media wheel in reservoir.

1.Turn knob on humidistat to minimum setting.

2.This is a normal condition since humidistat is controlling humidifier.