HUMIDIFIER

WWW.CLEANCOMFORT.COM

Return Air

Drain

Clean Comfort High Eciency

Media or Electronic Air Cleaner

Warm Air

DOWN FLOW

UP FLOW

IO-HE12-A 10/13

HE12

Evaporave Bypass Humidier

Precaution:

The installer should be an experienced service

technician. DISCONNECT ELECTRICAL POWER

BEFORE BEGINNING INSTALLATION. Do not

install where temperatures fall below

32° F / 0° C or where plenum temperatures

exceed 150° F / 66° C. When wiring into a

mul-speed blower circuit see Step 6.

Installation:

The humidier may be mounted with the

6˝ outlet to the right or le by inverng the

cabinet and reversing the posions of the

side panel. The humidier may be mounted

on the supply or return air plenum with

equal eciency.

FOR INSTALLATION ON A VERTICAL PLENUM

SURFACE OF ANY FORCED AIR FURNACE

Additional Materials That May Be Necessary:

1. 1/4˝ diameter plasc supply tubing

(or 1/4˝ copper supply tubing for hot

water applicaons).

2. 6˝ diameter galvanized by-pass pipe

(provided with “B” models, which include

a bypass kit).

3. 18 Gage electrical wire and wire nuts

4. Current sensing relay (part number HEP-GA50

suggested) or air pressure proving switch

(part number HEP-12500 suggested).

5. #8 self piercing sheet metal screws.

Proprietary Notice

This document and the informaon disclosed herein are

proprietary data of Daikin North America LLC. Neither this

document nor the informaon contained herein shall be

reproduced, used, or disclosed to others without the wrien

authorizaon of Daikin North America LLC except to the

extent required for installaon or maintenance of recipient’s

equipment.

Liability Notice

Daikin North America LLC does not accept any liability for

installaons of humidity equipment installed by unqualied

personnel or the use of parts/components/equipment that

are not authorized or approved by Daikin.

Typical Installation For Bypass Humidiers

Important:

HVAC Installer: Read and save these instrucons. This guide to be le with equipment owner. Equipment Owner: Fill out and send

in the product registration card to register this product.

Product registration is required to get the benets of the warranty,

except that failure by residents of California or Quebec to register the products will not diminish their warranty rights.

See the full warranty text at your dealer or at the end of this document.

WWW.CLEANCOMFORT.COM

IO-HE12-A IO-HE12-A

This humidier is capable of delivering up to 12 GPD of humidity, according to the industry-standard performance test, AHRI 610,

which species an air ow of approximately 200 CFM and plenum temperature of 120° F / 49° C. If the furnace or air handler

operates at lower temperatures or air ow, the amount of humidity delivered will be less than 12 GPD. If an HRV is installed in the

system, some of the humidity in the house will be transferred outside by the HRV; if this is the case, the humidier should be sized

to accommodate for this humidity loss.

8-7/8˝

9-1/2˝

6˝

The Clean Comfort Model HE12 may be installed on

either the supply or return plenum of a forced air handling

system. Select a locaon for the humidier that allows for

service and maintenance. Using the installaon template

supplied with this humidier, cut out a rectangle 8-7/8˝

wide by 9-1/2˝ tall. Extend horizontal centerline of cut out

to the adjacent plenum. Cut a 6˝ hole 10˝ to 15˝ from side

of humidier, on cabinet centerline, using connecng

collar as guide. The bypass is reversible and can be

mounted on the right or le side of the humidier.

Open cover and remove evaporator pad assembly. Humidi-

er is self retaining. Slide top side in rst, then slide chassis

down. Level chassis and install center screws. If by-pass pipe

installs to opposite side of chassis, bend clip on chassis,

remove side discharge, and reinstall discharge to opposite

side of chassis. Install remaining four corner screws.

Corner

Screw

Corner

Screw

Corner

Screw

Corner

Screw

Attach by-pass pipe

to humidier here

Corner

Screw

Corner

Screw

Connect by-pass pipe to collar and humidier cabinet.

Using holes at top and boom of side panel discharge,

pierce 2 self tapping screws through by-pass pipe.

COPPER

TUBING

Hot Water

PLASTIC

TUBING

Cold Water

Compression

Nut

Sleeve

Insert

Saddle Valve Installaon Opon: Mount the self tapping

saddle valve (4a) or code valve (4b next page) on either a

cold or hot water* pipe. A side or top mount is best to avoid

clogging from pipe sediment. Connect 1/4˝ O.D. tubing to

the saddle valve. Copper tubing requires a brass compression

nut and brass sleeve. Plasc tubing requires a brass compres-

sion nut, a brass insert inside the tubing and a plasc sleeve

on the outside.

NOTE: DO NOT USE PLASTIC TUBING ON HOT WATER OR IN CON-

TACT WITH ANY HOT PLENUM SURFACE OR DUCT. INSTALLATION

OF THIS SADDLE VALVE MUST MEET OR EXCEED LOCAL CODES AND

ORDINANCES. USING HOT WATER WILL INCREASE THE AMOUNT OF

HUMIDITY DELIVERED TO THE HOME, AND WILL ALSO INCREASE

THE DEMAND ON THE HOME’S DOMESTIC HOT WATER SYSTEM.

1 3

Attach by-pass pipe

to humidier here

WIRE JUMPER

(HOT)

115v.

60CY.

ON-OFF SWITCH

COMMON LEAD

FURNACE

GA50

CURRENT

SENSING

RELAY

MULTI

SPEED

BLOWER

MOTOR

AC L

AC N

HUM

24V. SOLENOID VALVE

727-58 24 V. TRANSFORMER

(HOT)

115v.

60CY.

ON-OFF SWITCH

AC L

AC N

HUM

SNSR

24V. SOLENOID VALVE

24 V. TRANSFORMER

(HOT)

115v.

60CY.

ON-OFF SWITCH

HEP-12500 AIR

PRESSURE SWITCH

AC L

AC N

HUM

SNSRSNSR

SNSR

24V. SOLENOID VALVE

24 V. TRANSFORMER

FURNACE

CONTROL BOARD

24v.

60CY.

AC L

AC N

HUM

24V. SOLENOID VALVE

FURNACE

BOARD

WIRE JUMPER

OUTDOOR TEMP. SENSOR

24v.

60CY.

ACC

EAC

(HOT)

115v.

60CY.

ON-OFF SWITCH

COMMON LEAD

FURNACE

GA50

CURRENT

SENSING

RELAY

MULTI

SPEED

BLOWER

MOTOR

24V. SOLENOID VALVE

HUMIDISTAT

24 V. TRANSFORMER

(HOT)

115v.

60CY.

ON-OFF SWITCH

24V. SOLENOID VALVE

24 V. TRANSFORMER

(HOT)

115v.

60CY.

ON-OFF SWITCH

HEP-12500 AIR

PRESSURE SWITCH

24 V. TRANSFORMER

HUM

FURNACE

CONTROL BOARD

24v.

60CY.

24V. SOLENOID VALVE

HUMIDISTAT

FURNACE

BOARD

WIRE

JUMPER

WIRE

JUMPER

WIRE

JUMPER

WWW.CLEANCOMFORT.COM

IO-HE12-A IO-HE12-A

3/4˝ TEE

1/2˝ TEE

HEP-GCV3412 Code Valve Installation Option:

Copper Pipe

1. Turn o water supply.

2. Clean pipe, ngs and valve with sandpaper or wire brush.

3. Apply a thin layer of ux to all surfaces to be soldered.

4. Assemble valve to pipe and/or ngs.

5. Cooling the valve by wrapping a weed rag around

the valve is oponal.

6. Heat the joints with a torch. Apply solder to each joint.

Connue to apply heat sucient to keep solder liquid.

7. Aer solder has lled enre joint area, remove heat

and allow joint to cool. Do not move or disturb.

8. Slide compression nut over 1/4˝ copper tube

followed by compression sleeve.

9. Insert tube into valve fully and ghten nut.

10. Turn on water supply and check for leaks.

7A-7D Electronic

Humidistat

7A – To furnace control board

24 volts

7B – To constant power using

24V transformer and

pressure switch

7C – To furnace control board

115 volts with 24V

transformer

7D – To constant power using

24V relay and current

sensing relay

7E-7H Manual Humidistat

7E – To furnace control board

24 volts

7F – To constant power using

24V transformer and

pressure switch

7G – To furnace control board

115 volts with 24V

transformer

7H – To constant power using

24V relay and current

sensing relay

Connect 1/4˝supply tube at inlet of solenoid (there is an internal

brass lter beyond inlet, not shown). DO NOT USE PLASTIC

TUBING IN CONTACT WITH ANY HOT PLENUM

SURFACE OR DUCT. IF USING PLASTIC TUBING,

USE TUBE SUPPORT HEP-P189 AND PLASTIC COM-

PRESSION SLEEVE HEP-P190 (Supplied with humidier).

Connect drain hose to 1/2˝ spout on humidier cabinet using

hose clamp. Run 1/2˝ hose to suitable drain such as oor drain,

sewer or laundry sink. Be sure hose has connuous slope and is

not kinked at any point.

Turn damper knob to winter (open) posion. Turn on water

supply and check operaon of humidier. Set humidistat to a

demand seng. With the furnace o, the solenoid valve should

be closed. Start the furnace, the solenoid valve should open

when the blower or burner circuit is energized. Check ow

of water through distributor trough and evaporator pad.

The standard HEP-GA4231 YELLOW orice will supply

approximately 3.5 GPH of water at a line water pressure

of 60 psi. For low water pressures (20-40 psi) a larger ORANGE

orice HEP-GA4299 is available to provide the same ow.

Leave humidistat set at the recommended seng.

* CODE VALVE IS INCLUDED WITH AUTOMATIC MODELS ONLY,

but can be purchased separately as part number HEP-GCV3412.

HEP-

P102 COMPRESSION SLEEVE

HEP-

P101 COMPRESSION NUT

HEP-570-40 PAD RAIL

HEP-570-1 CHASSIS

HEP-GA4226 DISTRIBUTOR TUBE

HEP-GA4040 SOLENOID

VALVE ASSEMBLY

HEP-GA4004 STAINER SCREEN

HEP-P189 BRASS TUBE INSERT

HEP-P101 COOMPRESSION UNIT

HEP-P190 COMP. SLEEVE (PLASTIC) /P102

COMP. SLEEVE (BRASS)

HEP-GA4231 YELLOW ORIFICE

HEP-900-14 DRAIN PAN

HEP-900-71 BADGE

HEP-570-13 COVER

HEP-900-11 DAMPER KNOB

HEP-900-28 DAMPER DISK

HEP-570-2 SIDE PANEL

DISCHARGE

HEP-900-9 NOZZLE

HEP-GA-10 EVAPORATOR PAD

HEP-900-15 DISTRIBUTOR TROUGH

HEP-900-10 SPOUT

PARTS LIST FOR HUMIDIFIER

WWW.CLEANCOMFORT.COM

IO-HE12-A IO-HE12-A

CARE AND MAINTENANCE

Your humidier is engineered to give helpful and

trouble-free humidication. For maximum eciency

the following cleaning procedures should be carried

out at the end of each heating season:

1. Turn o water supply and turn humidistat seng to the

“OFF” posion.

2. Remove humidier's front cover, distributor trough,

evaporator pad and drain pan. Clean excessive mineral

deposits from the distributor trough, drain pan, pad rails,

and humidier cover and chassis. A soluon of 1/2 vinegar

& 1/2 water will help loosen mineral deposits, or you may

use a common household de-scaler.

3. Replace evaporator pad part number HEP-GA19 seasonally.

(Some instances require 2 pad replacements per heang

season, depending on water hardness.) Install trough and

drain pan. Replace cover. For peak performance do not

aempt to clean evaporator pads, or use longer than one

heang season.

4. In areas where the supply water for the humidier contains

a high mineral content, OR if the solenoid valve fails to

operate, the solenoid and the strainer screen should be in-

spected and descaled. To do this disconnect the 1/4˝ water

supply line from the solenoid valve. Carefully pull the

strainer screen (part number HEP-GA19 ) from the valve

HE12MB Models shipped to

Canada, also contain (Not shown

on diagram):

• HEP-1042-28 Bypass Kit (Includes

ex duct, start collar and 15�

drain hose)

• HEP-747-38 Water Supply

Tubing Kit (Includes water

hose, Compression Nuts,

2 Compression Sleeves

and 2 Brass Tube Inserts)

• HEP-1042-40 Extra Die Cut

• HEP-1040-13 Ring Flange

• HEP-990-31 15� Drain Tube

• HEP-570-80 Hardware

• MHX3 Wall Mount

Humidistat (allows mounng

on wall or in duct)

Humidistats (Not Shown):

HE12 “A” Models = HEP-GFX3

HE12 “M” Models = HEP-MHX3

At Outside

Temperature

Recommended

Setting

-20 ° F -29 ° C 15%

-10 ° F -23 ° C 20%

0 ° F -18 ° C 25%

+10 ° F -12° C 30%

+20 ° F -7 ° C 35%

+30 ° F -1 ° C 40%

body (part number HEP-900-6). Clean the mineral deposits

from all parts. If the orice is clogged, it may be opened by

inserng a small pin. Reassemble the brass ngs, ensuring

the strainer screen has been fully seated.

5. Reconnect the 1/4˝ water line to the solenoid valve if

necessary. Turn on the water supply and check all points for

leakage. The operaon of the unit may

be checked by starng the furnace. The humidier operates

only when the furnace blower is running or the burner circuit

is energized. The humidier is now ready for operaon.

6. During the summer, turn o water supply and turn the

humidistat seng to the “OFF” posion. Close air damper

disk on the humidier.

HOW THE HUMIDIFIER WORKS

WWW.CLEANCOMFORT.COM

IO-HE12-A IO-HE12-A

TROUBLESHOOTING (By Licensed Professionals Only)

The operang principle of the humidier is based on the

most ecient and economical means of evaporang water

to the air. The humidier uses only 2.5 was of electrical

power during operaon, less than the smallest household

light bulb. The heat necessary for evaporang water is

produced by the furnace.

The water supply to the humidier is controlled by the

electric solenoid valve. The humidistat connected in series

with the solenoid provides low voltage control of the

humidier. The humidistat is designed for wall mounng in

the living area or surface mounng on the return air duct.

ELECTRICAL RATING: 24 VAC / 60 Hz.

Water ows through a strainer, is metered through an

orice to provide the proper amount of water, and is supplied

to the evaporator pad by the distributor trough. Approxi-

mately 200 CFM of air is by-passed from the warm air

plenum through the humidier and returned to the cold

air plenum. Moisture is evaporated to the air passing

through the evaporator pad.

Minerals are not blown into the air stream, but are le on

the evaporator pad where a high percentage is carried o

with the waste water. When the humidier is installed and

operang, no adjustments are necessary other than seng

the control knob on the humidistat to the desired level of

humidicaon. Set the damper knob on the humidier to

“WINTER” posion. To turn the humidier o, close water

supply valve and turn humidistat to the “OFF” posion.

If furnace is used for summer cooling or venlang set the

damper knob to “SUMMER”.

DO NOT SET RELATIVE HUMIDITY TOO HIGH DURING

COLD WEATHER. EXCESSIVE HUMIDITY MAY CAUSE

CONDENSATION ON WINDOWS OR IN WALLS. REFER

TO RECOMMENDED SETTINGS AS DESCRIBED IN THE

HUMIDISTAT OWNERS MANUAL.

1. Verify water supply is on.

2. Verify metering orice is not obstructed. Very hard water with high mineral content may restrict

the metering orice in as lile as one heang season. Replace metering orice if restricted.

(part number HEP-GA4231).

1. Replacement parts can be purchased through the installing contractor.

1. Verify humidier and humidistat wiring. Humidier should operate with furnace burner

or blower cycle.

1. Reduce the seng on the humidistat*. Refer to CARE AND MAINTENANCE secon of this manual

to esmate a humidity seng for the home based on outside temperature.

Proper voltage present at

solenoid valve (24 VAC

but no water ow.

Humidier runs without

furnace operaon or

humidier never shuts o.

Too much humidity in home

and/or condensaon on

windows.

Where can I purchase

replacement parts?

TECHNICAL SUPPORT • 1-855-303-1821 • www.cleancomfort.com

Symptoms

Humidier will not operate.

Diagnostic Steps

1. Verify that the operang mode of the home’s thermostat is set to “HEAT”. Adjust the setpoint

on the thermostat to 5 degrees higher than the current room temperature. This should force

the furnace on (you may need to wait up to 2 minutes before the furnace’s blower motor starts).

Operaon of the furnace may be necessary to power the humidier.

2. Humidity level in home may be higher than humidistat seng. Increase humidity seng on

humidistat.*

3. Verify water supply is on.

4. Check for voltage at the solenoid valve. Voltage should be 24VAC. Bypass the humidistat if

necessary to isolate the solenoid valve circuit.

5. Verify wiring of humidier and humidistat.

* The humidistat is generally located on furnace return plenum, or on an inside wall in the living space.

HUMIDIFIER SPECIFICATIONS

WWW.CLEANCOMFORT.COM

IO-HE12-A IO-HE12-A

Approximate size of home that can be humidied by each humidier model, based on air ghtness of the home.

Humidier Chassis with plenum

cut out shown as dashed lines

Model GPD

Loose

(0.75 AC/H)

Average

(0.50 AC/H)

Tight

(0.30 AC/H)

HE12 12 800 sq. . 1200 sq. . 2000 sq. .

HE17 17 1115 sq. . 1650 sq. . 2800 sq. .

HE18 18 1175 sq. . 1770 sq. . 3000 sq. .

Humidier Performance Baseline Criteria

Outside Design Temp 0° F / -18° C

Outside Design R.H. 70% R.H.

Inside Design Temp. 70° F / 21° C

Inside Design R.H 30% R.H.

15-1/2˝

13-3/4˝

13-1/4˝

8-7/8˝

9-1/2˝

Footnote: If plenum temperature is less than 120° F / 49° C, the amount of humidity delivered to the home will be less than

the GPD specicaon shown above.

HUMIDIFIER PACKAGED COMPONENT ACCESSORIES

Model HE12A includes:

Humidier components: HEP-GA10 Vapor pad, HEP-GA4040 solenoid assembly, Integral Bypass Damper

Accessories: HEP-GFX3 Automac Digital Humidistat, 24V Transformer, Code Valve, Saddle Valve

Model HE12M includes:

Humidier Components: HEP-GA10 Vapor Pad, HEP-GA4040 Solenoid Assembly, Integral Bypass Damper

Accessories: HEP-MHX3 Manual Humidistat, 24V Transformer, Saddle Valve

Air Changes/Hour (AC/H) 0.30

Ceiling Height 8 ft

Furnace Plenum Temp. 120° F / 49° C

Furnace run time for

calculating sq. ft. 8hr/1 day

WARRANTY REGISTRATION

WWW.CLEANCOMFORT.COM

IO-HE12-A IO-HE12-A

LIMITED WARRANTY

What This Limited Warranty Covers

Daikin North America LLC (“Daikin”) warrants that, for the period

stated below, its HE Series evaporave humidier (the “Product”)

will be free from defects in manufacturing or materials.

What This Limited Warranty Does Not Cover

This limited warranty does not cover components or materials used

in the installaon of the Product, including, but not limited to, wiring,

fasteners, ductwork, gaskets, pipes, or tubes. This warranty does not

cover evaporator pads, water strainers, or metering orices.

Who Has Rights under this Limited Warranty

This limited warranty runs to the original purchaser of the Product(s)

who owns, and resides in, the residenal dwelling in which the

Product(s) are inially installed (“you”).

Other Limitations

Remedies under this limited warranty are condioned upon the

normal use and care of the Product(s). The Product must have been

installed according to its manual and all applicable wiring diagrams,

in addion to all applicable building and construcon codes and all

other applicable law. This limited warranty does not cover damage

caused by misuse, neglect, re, damage in transit, sediment, poor

water quality, or other casualty, damage caused during installaon,

or any cause beyond the control of Daikin. This warranty does not

cover Products placed into commercial or industrial service.

How Long This Limited Warranty Lasts

This limited warranty begins on the date upon which the Product is

installed. The limited warranty lasts for 10 years.

Registering Your Product

To be eligible for warranty coverage, you must register your Product

within 30 days aer installaon. You can register your Product in any

of the following ways.

• Return the Product registraon card within 30 days aer

the Product is installed.

• If you have any diculty with this method, you can call Daikin

at 1-855-303-1821 for assistance.

Failure by California or Quebec residents to register the

Product does not diminish their warranty rights.

How to Obtain Service

• Contact the contractor from whom you purchased the

Products(s), or

• Contact Daikin using the informaon below.

What Daikin Will Do

If the Product(s) covered by this limited warranty are not as

warranted and you nofy Daikin of such failure during the term of

the limited warranty, Daikin will, at its opon, furnish replacement

part(s) and/or whole replacement Product(s). If the exact original

Product or part is no longer available, Daikin reserves the right to

substute a similar part or Product of equal or greater quality. All

replacement parts or Products will be shipped either to the original

selling contractor or directly to you. You must pay for all shipping of

replacement part(s) and/or Product(s). Labor, de-installaon costs,

and re-installaon costs are not covered by this limited warranty.

Daikin reserves the right to inspect any Product(s) that you believe

fails to meet the requirements of this limited warranty and you must

allow Daikin or its representaves all access reasonably necessary to

perform such inspecons or at Daikin’s request, return the Product(s).

Any part replaced pursuant to this warranty is warranted only for the

unexpired poron of the warranty term applying to the original part.

Limitation of Liability

IN NO EVENT WILL DAIKIN BE LIABLE FOR ANY INCIDENTAL OR

CONSEQUENTIAL DAMAGES ARISING OUT OF THE FAILURE OF THE

PRODUCT, WHETHER BASED ON BREACH OF EXPRESS OR IMPLIED

WARRANTY, OTHER BREACH OF CONTRACT, NEGLIGENCE OR

OTHER TORT. Some states and provinces do not allow the exclusion

or limitaon of incidental or consequenal damages, so the above

limitaon may not apply to you.

Your Rights Under State Law

This warranty gives you specic legal rights, and you may also have

other rights which vary from state to state or province to province.

How to Contact Daikin

You may contact Daikin about warranty quesons or claims using

the following contact informaon: by mail at 43800 Grand River,

Novi, Michigan, 48375 or, by telephone at 1-855-303-1821.

HUMIDIFIER

WWW.CLEANCOMFORT.COM

IO-HE12-A 10/13

Our connuing commitment to quality products may mean a change in specicaons without noce.

Houston, Texas • USA

TECHNICAL SUPPORT • 1-855-303-1821

Mail Form To:

Clean Comfort

An: Warranty Dept.

43800 Grand River Ave.

Novi, MI 48375

Product Information:

Serial Number: ________________________________________________________________________

Model: ______________________________________________________________________________

Install Date: Month ______________________ Day ___________ Year _________________________

Owner Information:

Contractor Name: _____________________________________________________________________

Address: _____________________________________________________________________________

Address 2: ____________________________________________________________________________

City: ______________________________ State: _________________ Zip Code: __________________

Phone: _______________________________________________________________________________

Email: _______________________________________________________________________________

Contractor Information:

Contractor Name: _____________________________________________________________________

Address: ___________________________________________________________________________

Address 2: ___________________________________________________________________________

City: ______________________________ State: _________________ Zip Code: __________________

Contractor Phone: _____________________________________________________________________

Contractor Email: ______________________________________________________________________

Cut Along Dashed Line